Heterogeneous mixture of polymers and method of increasing content of filling agent in paper or carton sheet with its application (versions)

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a method of obtaining heterogeneous mixture used in the paper industry. Described is the method of manufacturing heterogeneous mixture of polymers, including: (a) introduction into a solution of the first portion of a polymerisation initiator and one or several anionic or cationic monomers, with monomers carrying the same charge; (b) introduction into the solution of the second portion of the polymerisation initiator and one or several non-ionic monomers; (c) introduction of the third portion of the polymerisation initiator and one or several ionic monomers, whose charge is opposite to the charge of monomers from (a); (d) gradual introduction of the fourth portion of polymerisation initiator for a reaction of any remaining monomer with formation of a heterogeneous mixture of polymers; and (e) in case of necessity neutralisation of the obtained heterogeneous mixture of polymers, with anionic monomers being selected from the group, consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrene sulfonic acid, (4) vinyl sulfonic acid, (5) acrylamido methylpropane sulfonic acid and (6) their mixtures; cationic monomers are selected from the group, which includes: (1) diallyldimethylammonium chloride, (2) acryloylethyl trimethylammonium chloride, (3) methacryloylethyltrimethylammonium chloride, (4) acryloylethyltrimethylammonium sulfate, (5) methacryloyl ethyltrimethylammonium sulfate, (6) acrylamidopropyltrimethylammonium chloride, (7) methacrylamidopropyl trimethylammonium chloride, (8) non-quaternised forms (2)-(7), (9) vinylformamide (further hydrolised into vinylamine) and (10) their mixtures, and non-ionic monomers are selected from the group, consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylamide, (4) vinylformamide and (5) their mixtures. Also described is the heterogeneous mixture of polymers, intended for increasing the content of a filling agent in paper or carton, obtained by the method described above. Methods of increasing the content of the filling agent in a paper or carton sheet with application of the said heterogeneous mixture of polymers are described.

EFFECT: increase of the content of an inorganic filling agent in paper with simultaneous preservation of weight, strength and suitability of the final product for processing.

17 cl, 9 tbl, 14 ex

 

BACKGROUND of INVENTION

In the paper industry is very profitable to replace the wood fiber in paper and cardboard inorganic filler as an inorganic filler is usually cheaper than wood fibers and this replacement reduces costs. Usually in industry are used as filler precipitated calcium carbonate. Despite the fact that inorganic fillers reduce the overall production costs of paper, with the increase in the concentration of these additives decrease the total mass, strength and stiffness of the paper, i.e. properties that are important for the final application paper.

Reducing the strength and stiffness of the resulting paper is due to differences in the structure of wood and inorganic filler. During the manufacture of paper long wood fibers mixed up, forming a solid mesh of fibers. The inorganic filler does not contain such long chains of fibers, and an increase in the content of the inorganic filler may weaken the mesh of fibers in the final product. In addition, with increasing content of the inorganic filler is reduced initial blagorodnost paper web at the outlet of the pressing section of the paper machine. This reduction in strength affects the health of the machine and may cause performance degradation is whether increased uptime due to gaps damp cloth.

Although the prior art in the manufacture of paper were proposed processing methods aimed at retention of fine particles of inorganic fillers in the resulting paper or paperboard, not previously known methods for enhancing the content of the inorganic filler in the paper while maintaining mass, strength and suitability of the final product to be processed.

For example, in the prior art have been known for durable dry resin, which increase the strength of the resulting paper, when they are mixed with a suspension of the original paper pulp (also called a paper charge). In the prior art have been known amphoteric water-soluble dry solid resin. Amphoteric resin is usually obtained by free-radical copolymerization of acrylamide with cationic or anionic monomers (for example, diallyldimethylammonium chloride ("DADMAC") and acrylic acid). The content of such resins do not exceed 10-15 mol. % of each ionic component (20-30 mol. percent of total polymer). At higher concentration of the polymer solution becomes unstable.

In addition, in the prior art have been known to separate anionic and cationic polymer dry durable resin. Typically, these resins are added sequentially, i.e. first add all the resin od of the CSO type, and then add the entire resin of a different type. When anionic and cationic resin added separately, the anionic resin is typically a copolymer of acrylamide and acrylic acid. Cationic resin usually contains either DADMAC or acrylonitrilebutadiene chloride (AETAC"), or gidralizovanny form vinylformamide.

For example, the content of the inorganic filler can be improved by processing the polymer suspension of cellulose and inorganic filler separately - first one charged polymer, then the polymer with oppositely charged ions, and then mix the treated filler is treated with a suspension of cellulose. Alternatively, you can process the polymer only inorganic filler, and then merge the treated filler with a suspension of cellulose.

Another way to save paper pulp with increasing content of the inorganic filler is to increase the average particle size of the inorganic filler. The increase in the filler concentration and/or size of the filler particles may cause additional roughness on the surface of the paper pulp. The roughness usually lead to additional wear and tear on the wet end of the paper in the process of its production, in particular on formovochnykh and in static drain nodes. In addition, increased wear these nodes, shears and other surfaces can reduce the quality of the paper and increase the cost of maintenance and operation of equipment. Previous attempts at solving these problems included the introduction of additives, surfactants and Teflon (TEFLON, PTFE) suspension of cellulose.

The INVENTION

In General, the invention relates to the surprising discovery, according to which a heterogeneous mixture of polymers containing at least one anionic, one cationic and one non-ionic monomer, can be used to increase the content of the inorganic filler in the paper that there is a negative impact on the strength of the paper, the mass or its suitability for processing. This discovery allows you to organize cost-effective production of paper or cardboard. In one aspect the present invention also relates to a new method of obtaining new heterogeneous mixtures of polymers. Finally, in another aspect, the present invention also relates to methods of using heterogeneous mixtures of polymers with filler is precipitated calcium carbonate to maintain strength, mass, and the suitability of paper or paperboard for processing.

One variant of the present invention provides a method of making a heterogeneous polymer mixture is to increase the content of inorganic filler in paper or cardboard, including: (a) introducing into the solution with neutral pH of the first portion of the polymerization initiator and one or more anionic or cationic monomers, and all monomers have the same charge; (b) introducing the solution of the second portion of the polymerization initiator and one or more nonionic monomers; (C) introducing a third portion of the polymerization initiator and one or more ionic monomers, a charge which is opposite to the charge of monomers stage (a); and (d) the gradual introduction of the fourth portion of the polymerization initiator to interact with any remaining monomer and formation of a heterogeneous mixture of polymers, and (e) optionally neutralizing the obtained heterogeneous mixture of polymers, and polymerization initiator selected from the group consisting of water-soluble azo compounds.

Anionic monomers may be: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic or mixtures thereof.

Cationic monomers can be: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acrylonitrilebutadiene sulfate, (5) methacryloxypropyltrimethoxysilane sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene holdem the reed, (8) nekvotirovannoe forms reagents(2)-(7), (9) vinylformamide (later hydrolisis in vinylamine) or (10) mixtures thereof.

Non-ionic monomers may be: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide or (5) mixtures thereof.

In another embodiment, the invention provides a heterogeneous mixture of polymers comprising: (a) one or more anionic polymers derived from monomers selected from the group:

(1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic and (6) mixtures thereof; (b) one or more cationic polymers derived from monomers selected from the group of: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acrylonitrilebutadiene sulfate (5) methacryloxypropyltrimethoxysilane sulfate, (6) acrylamidophenylboronic chloride (7) methacrylamidoethylene chloride, (8) nekvotirovannoe forms reagents(2)-(7) (9) vinylformamide (later hydrolisis in vinylamine) or (10) mixtures thereof; (C) one or more nonionic polymers obtained from monomers chosen from the group: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;

A heterogeneous mixture of polymers may also contain (a) one or n is how many copolymers of at least one anionic monomer with at least one non-ionic monomer; (b) one or more copolymers of at least one cationic monomer with at least one non-ionic monomer.

A heterogeneous mixture of polymers may also contain one or more terpolymers containing at least one anionic monomer, at least one cationic monomer and at least one non-ionic monomer.

Another variant of the invention provides a method of increasing the filler content of a sheet of paper or cardboard, comprising: (a) integrating heterogeneous mixture of polymers with filler is precipitated calcium carbonate with the formation of a mixture; (b) combining the mixture with a suspension of cellulose; and (C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

Another variant of the invention provides a method of increasing the filler content of a sheet of paper or cardboard, comprising: (a) the Association or heterogeneous mixture of polymers, or filler is precipitated calcium carbonate with a suspension of cellulose and the formation of a mixture; (b) combining the remaining component from step (a) with a mixture of a suspension of cellulose; and (C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

Another variant of the invention provides a method of increasing the filler content of a sheet of paper or paperboard, including:

p> (a) combining a copolymer of a mixture of polydiallyldimethyl chloride/acrylamide/acrylate with filler is precipitated calcium carbonate; (b) combining the mixture with a suspension of cellulose; and (C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

Another variant of the invention provides a method of increasing the filler content of a sheet of paper or cardboard, comprising: (a) combining a copolymer of a mixture of polydiallyldimethyl chloride/acrylamide/acrylate or filler is precipitated calcium carbonate with a suspension of cellulose; (b) combining the remaining component from step (a) with a mixture of a suspension of cellulose; and (C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

DETAILED description of the INVENTION

Used here, the articles "a" and "the" are synonymous and are used interchangeably with the terms "one or more" or "at least one" as long as the context does not clearly indicate the opposite sense. Accordingly, for example, reference to "connection" here or in the attached formula refers to a single compound or more than one connection. In addition, it is clear that all numerical values, unless otherwise indicated, contain the term "about". It should be understood that all of the songs and with whom persons may be present in at least trace amounts of unreacted components, including the initiators of any reactions of monomers and polymers. Unless otherwise stated, "wt.%" refers to mass% solids in the concrete mixture and excludes the mass of water contained in the water solution.

Compositions and methods for the different variants of the present invention can be used to increase the content of the inorganic filler in paper and cardboard. The present invention also improves the suitability for processing a damp cloth paper mixture. The present invention includes a new heterogeneous mixture of polymers derived from anionic, cationic and non-ionic monomers. The present invention also includes the method of preparation in situ of the new heterogeneous mixture of polymers. It also includes a method of increasing the content of the inorganic filler in paper and cardboard by treating the pulp suspension heterogeneous mixture of polymer and filler is precipitated calcium carbonate. Finally, the present invention includes a method of increasing the content of the inorganic filler in the paper by treating the suspension of cellulose copolymer mixture polydiallyldimethyl chloride/acrylamide/acrylate with filler is precipitated calcium carbonate.

A stable aqueous composition of a heterogeneous mixture of polymers can be prepared in situ by sequential reactions in solution with neitralnym pH. Before and during the reaction the pH of the solution remains neutral in order to minimize the reaction between the anionic and cationic monomers. The method comprises the stage of: (a) polymerization of one or more anionic monomers in the presence of initiator, thermal polymerization and in neutral solution; (b) introducing the solution of one or more nonionic monomers and additional initiator, thermal polymerization; (C) adding to the solution one or more cationic monomers and additional initiator, thermal polymerization; (d) interaction of any remaining monomer added initiator, thermal polymerization; and (e) neutralizing the resulting aqueous heterogeneous mixture of polymers. The obtained heterogeneous composition of the polymers contains mainly nonionic Homo-polymer, a cationic homopolymer, anionic Homo-polymer, anionic/non-ionic copolymer, cationic/non-ionic copolymer and optional anionic/nonionic/cationic terpolymer. Specialists in this field it is clear that this composition will contain trace amounts as initiator, thermal polymerization, and monomer components.

As shown in the examples below, the Monomeric components can be added in reverse order, so the first to react cationic monomer, and the last anionic monomial is. Alternative heterogeneous mixture of polymers can be prepared separately by the polymerization of anionic, cationic and non-ionic, and then merge the resulting polymers in the mixture. It is preferable to obtain a heterogeneous mixture of polymers by the reaction in situ.

The polymerization initiator may be any, including, but not limited to, the initiators of oxidative recovery and thermal polymerization. Preferably, the polymerization initiator represented by the initiator, thermal polymerization. More preferably, the polymerization initiator was water-soluble uzasadnienie. Most preferably, the polymerization initiator represented azodiisobutyronitrile the dihydrochloride (V50) from Wako, Richmond, Virginia.

The monomer can be any monomer that is widely used in the paper industry. Preferably, the anionic monomer was acrylic acid, methacrylic acid, styrelseledamot, vinylsulfonate or acrylamidophenylboronic. More preferably, the anionic monomer was acrylic acid.

Preferably, the cationic monomer was diallyldimethylammonium chloride; acrylonitrilebutadiene chloride; methacryloxypropyltrimethoxysilane chloride; acrylonitril the ammonium sulfate; Methacrylonitrile the rd sulfate; acrylamidophenylboronic chloride; methacrylamido propyltrimethylammonium chloride; nekvotirovannoe form acrylonitrilebutadiene chloride, methacryloxyethyl the ammonium chloride, acrylonitrilebutadiene sulfate, methacryloxypropyltrimethoxysilane sulfate, acrylamide propyltrimethylammonium chloride, methacrylamido propyltrimethylammonium chloride and vinylformamide (later hydrolyzable to vinylamine). More preferably, the cationic monomer was diallyldimethylammonium chloride.

Preferably, the nonionic monomer represented acrylamide, methacrylamide, N-alkylacrylate or vinylformamide. More preferably, the nonionic monomer was acrylamide.

The mole fraction of each component of the heterogeneous mixture of polymers can be in the range of about 1-50 mol. percent of each monomer.

Preferably, the molar ratio of reagents was in the range of about 10-30 mol. % anionic monomer, about 40 to 80 mol.% non-ionic monomer and about 10 to 30 mol.% cationic monomer.

Depending on the molar fraction of each monomer of the final heterogeneous mixture of polymers can be charged positively or negatively, or it can be electroneutral. It is preferable to choose a mole fraction of anionic and cationic components so that Goethe is agenda the mixture of polymers was almost neutral in charge at neutral pH. However, there are times when a more favorable total anionic or cationic charge.

The monomers are polymerized linearly with the exception of those cases when there are bifunctional compounds. If for a particular application desired branched polymers, one or more stages of the polymerization reaction, you can add bi - or polyfunctional compounds in low concentrations. Preferably, the reaction did not attend bi - or polyfunctional compounds and the resulting polymers were almost linear.

Heterogeneous polymer blend can be used in any form appropriate to the traditions of the paper industry, including, but not limited to, aqueous suspension; reverse emulsions and microemulsions; dispersion in saline solution, and dried or precipitated mixture of polymers, crushed or powdered. It is preferable to use a heterogeneous polymer blend in the form of a stable aqueous suspension.

Heterogeneous polymer mixtures can be used to significantly increase the content of the inorganic filler in paper or cardboard while maintaining the physical properties of the final product, including the amount (mass), suitability for processing and durability. In the manufacture of paper high content of filler is very advantageous, because reorgan the ical filler is cheaper than primary or recycled wood fiber.

Heterogeneous polymer blends can increase the amount of inorganic filler in paper or cardboard by 10% (per dry weight) without compromising other physical properties of the final product. In the present invention can use any inorganic filler, including, but not limited to, precipitated calcium carbonate, ground calcium carbonate, kaolin clay, calcined kaolin clay, talc, calcium sulfate, calcium phosphate and titanium dioxide. It is preferable to use as the inorganic filler is precipitated calcium carbonate, ground calcium carbonate or kaolin clay. More preferably used as the inorganic filler is precipitated calcium carbonate. It is most preferable to use precipitated calcium carbonate in the modification of needle-like aragonite or cluster scalenohedral calcite. Preferred variants of the present invention offer a higher level of rigidity of the obtained sheet than other inorganic fillers.

The heterogeneous polymer blend of the present invention can be pre-mixed with the inorganic filler before the resulting mixture with a suspension of cellulose or heterogeneous mixtures is ü polymers and inorganic fillers can be added to the pulp suspension. It is preferable to mix heterogeneous mixture of polymers with inorganic filler before they will be added to the pulp suspension. Compounds of the present invention can also enter on the wet end of the papermaking machine.

A heterogeneous mixture of polymers effective in a wide range of concentrations. It is preferable to add to the suspension of cellulose of about 0.05-1 wt.% a heterogeneous mixture of polymers counting on all dry pulp (the pulp suspension plus supplements). It is more preferable to process a suspension of cellulose heterogeneous mixture of polymers in an amount of about 0.1-0.5 wt.% a heterogeneous mixture of polymers counting on all dry pulp.

A heterogeneous mixture of polymers can be used to obtain a paper with different properties, including, but not limited to, uncoated copy paper, high-grade coated paper, coated paper from mechanical mixture of wood, uncoated paper from a mixture of wood and wrapping paper.

Besides maintaining the desired properties of the final paper product while increasing the overall amount of inorganic filler in paper or cardboard, the present invention provides such an unexpected advantage of easier handling of the suspension of pulp with a high content of filler and see the LC forming tissues and stationary dewatering elements in the paper machine. Polymer mixture increases cohesion non-drying damp fabrics with high filler contents; this cohesion increases the suitability of the paper for processing due to the high content of filler. In addition, with the increasing content of inorganic filler in the suspension of pulp mechanical parts of the paper machine are exposed to extreme abrasion due to the inorganic filler. This wear increases the cost of maintaining the equipment and the machine downtime, which reduces productivity. Increase service life of fabrics and components of the machine can reduce the total cost of producing paper and increase the time of operation of the machine.

To reduce friction in the paper machine can be used to reduce friction additives of TEFLON type, however, such reagents can have a negative impact on the quality of the paper and often expensive. A heterogeneous mixture of polymers according to the present invention prolongs the life of the tissues in the paper machine in the laboratory tests. Treatment of a suspension of cellulose compound according to this invention reduces abrasion when the filler concentration is about 0.01-10 wt.% the entire dry weight of the filler. The preferred concentration is about 1.5 wt.% counting on all the dry weight of the filler. Heterogeneousness polymers can be used to reduce abrasion similar to the increase in the content of the inorganic filler in the resulting paper or cardboard.

EXAMPLES

The following examples illustrate variants of the present invention.

In each of examples wt.% means mass percent active solid polymer with the exception of an aqueous solution. In examples 7-14, which shows how the application of the new heterogeneous mixture of polymers to increase the content of the filler in the pulp suspension, all quantities of the substances specified as the fraction of active (solid) component from the whole mass of the processed dry material (wood fiber plus filler and other additives) without water.

Example 1: Obtaining in-situ heterogeneous polymer blend

Samples of heterogeneous polymer blends were prepared in the following way. Acrylamide from SNF, Riceboro, GA, and DADMAC from Kemira, Kennesaw, GA, was placed in a separate flask and was purged with nitrogen, not containing oxygen, within thirty (30) minutes. Into the flask containing the deaerated solution of acrylamide was added 1.10 g of 10% copper sulfate (II) from Sigma Aldrich, St. Louis, MO, and watched the flask in order to avoid uncontrolled exothermic reaction.

Separately in a glass chetyrehosnuju round bottom flask, equipped with a fridge, a mechanical stirrer, a thermocouple with a regulator, a tube for blowing nitrogen, tube for nitrogen and a heating jacket, added 35.51 g of acrylic acid from Rohm & Haas, Philadelphia, PA, downloaded 1432.53 g deionized the odes and blew nitrogen, not containing oxygen, within thirty (30) minutes.

In a separate 100 ml round bottom flask was loaded 46.87 g of 10% solution of α,α'-azodiisobutyronitrile dihydrochloride (V50) from Wako, Richmond, Virginia, and was stirred at 275 rpm, blowing nitrogen that does not contain oxygen, within thirty (30) minutes. To acrylic acid was added twenty percent (20%) (9.37 g) deaerated V50. The flask was heated to 55°C within thirty (30) minutes under stirring with a speed of 275 rpm Followed by temperature, so as not to miss an uncontrolled exothermic reaction. For regulating the temperature of the prepared ice bath.

In a three-liter flask was added 323.63 g of deaerated solution of acrylamide, and then another 20% (9.37 g) deaerated V50. The flask was heated to 55°C within thirty (30) minutes under stirring with a speed of 275 rpm thirty (30) minutes to raise the temperature to 65°C and added 121.33 g of deaerated solution of DADMAC. The remaining solution of V50 (28.12 g) was placed in a syringe pump. Added dropwise forty percent (40%) solution V50 (11.25 g) for a further 270 min while heating and stirring the solution with a speed of 275 rpm

After 270 min temperature in a three-liter flask was raised to 75°C. and added dropwise remaining solution V50 (16.87 g) within thirty (30) minutes. Thirty (30) minutes the temperature in the flask was raised to 80°C. and heated the ri 80°C for extension of sixty (60) minutes. The resulting solution was cooled to room temperature. Measured pH of the solution and installed a pH equal to 7 using sodium hydroxide.

The reaction formed a stable opaque suspension is a heterogeneous mixture of polymers containing polyacrylamide, sodium polyacrylate, polyacrylamide/acrylate copolymer, poly-DADMAC, poly-OOMAS/acrylamide copolymer and terpolymer polyacrylamide/acrylate/DADMAC concentration of active polymer 10% and viscosity Brookfield equal to 3000 CPs (measured using a rotor #3 LVT, 30 rpm at 22°C). The content of the components of the mixture calculated from the kinetic data and1H NMR spectra of the mixture during the process. The product was also analyzed after reaction method13WITH NMR. End of heterogeneous polymer mixture contained (in mass percent solid polymer): 13% polyacrylate, 4% polyacrylamide/acrylate copolymer, 64% polyacrylamide, 6% poly-OOMAS/acrylamide copolymer, 12% poly-DADMAC and 1% terpolymer polyacrylate/acrylamide/DADMAC. A heterogeneous mixture of polymers not deposited, not thickens and is not shared during curing at room temperature for thirty (30) days.

Example 2: Synthesis of in-situ heterogeneous polymer blend

Samples of a heterogeneous mixture of polymers was prepared as follows. Acrylamide from Kemira, Kennesaw, GA, and DADMAC from Sigma Aldrich, St. Louis, MO, is Stili in a separate flask and purged with nitrogen, not containing oxygen, within thirty (30) minutes.

Separately in 500 ml chetyrehosnuju round bottom flask, equipped with a fridge, a mechanical stirrer, a thermocouple with a regulator, tube for barbotine nitrogen, tube for nitrogen and a heating jacket, added 14.06 g of acrylic acid from Sigma Aldrich, St. Louis, MO. Into the flask was loaded 205 g of deionized water and was barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes. To the flask was added 0.24 g of isopropanol from VWR, West Chester, PA.

In a separate 50 ml round bottom flask was loaded 11.13 g of 20% solution of α,α'-azodiisobutyronitrile dihydrochloride (V50) from Wako, Richmond, VA, and was stirred with a speed of 275 rpm, barbotine nitrogen, which does not contain oxygen, within (30) minutes. To acrylic acid was added twenty percent (20%) (2.23 g) deaerated V50. Flask of 500 ml was heated to 45°C for 45 minutes under stirring with a speed of 275 rpm Followed by temperature, so as not to miss an uncontrolled exothermic reaction. For regulating the temperature of the prepared ice bath.

In a 500 ml flask was added 54.92 g of deaerated solution of acrylamide and then quickly made 40% (4.46 g) deaerated V50. The flask was heated to 45°C for 45 minutes under stirring with a speed of 275 rpm 45 min added 48.04 g of deaerated solution of DADMAC and 20% (2.23 g) deaerated V50. The flask on revali at 45°C for 45 minutes under stirring with a speed of 275 rpm

After 45 minutes the temperature of 500 ml flask was raised to 75°C. and added a solution of V50 (2.23 g). The mixture was heated at 75°C for one (1) hour. The resulting solution was cooled to room temperature. Measured pH of the solution and installed a pH equal to 7 using sodium hydroxide.

The reaction formed a stable opaque suspension is a heterogeneous mixture of polymers containing polyacrylamide, sodium polyacrylate, polyacrylamide/acrylate copolymer, poly-DADMAC, poly-DADMAC/acrylamide copolymer and terpolymer polyacrylamide/acrylate/DADMAC concentration of active polymer 10.2% and a Brookfield viscosity equal to 580 CPs (measured using a rotor #3 LVT, 30 rpm at 22°C). The content of the components of the mixture calculated from the kinetic data and analysis of spectra1H NMR of the mixture during the process.

A heterogeneous mixture of polymers were not deposited, not zahustovali and not separated during curing at room temperature for thirty (30) days.

Example 3: Synthesis of in-situ heterogeneous polymer blend

Samples of a heterogeneous mixture of polymers prepared in the following way. Acrylamide and DADMAC, both from SNF, Riceboro, GA, was placed in a separate flask and was barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes.

Separately in 500 ml chetyrehosnuju round bottom flask, equipped with a fridge, a mechanical stirrer,thermocouple, associated with the controller, the input of nitrogen to purge the release of nitrogen and heating the casing, downloaded 14.06 g of acrylic acid from SNF, Riceboro, GA, and 205.49 g of deionized water and stirred with a speed of 275 rpm for 30 min, barbotine nitrogen, which does not contain oxygen.

In a separate 50 ml round bottom flask was added 11.13 g of 20% solution of α,α'-azodiisobutyronitrile dihydrochloride (V50) from Wako, Richmond, VA, and was stirred with a speed of 275 rpm, barbotine nitrogen, which does not contain oxygen, within thirty (30) minutes. To acrylic acid was added twenty percent (20%) (2.23 g) deaerated V50. a 500 ml flask was heated to 45°C for 45 minutes under stirring with a speed of 275 rpm Followed by temperature, so as not to miss an uncontrolled exothermic reaction.

In a 500 ml flask was added 54.92 g of deaerated solution of acrylamide, and then quickly made 40% (4.46 g) deaerated V50. The flask was heated to 45°C for 45 minutes under stirring with a speed of 275 rpm 45 min added 48.04 g of DADMAC solution and 20% (2.23 g) deaerated solution of V50. Next, the flask was heated at 45°C for 45 minutes under stirring with a speed of 275 rpm

After 45 minutes the temperature in a 500 ml flask was raised to 75°C. and added to the remaining solution of V50 (2.23 g). The mixture was heated at 75°C for one (1) hour. The resulting solution was cooled to room temperature. I measured the pH of the solution and set pH, equal to 7 using sodium hydroxide.

The reaction formed a stable opaque suspension is a heterogeneous mixture of polymers containing polyacrylamide, sodium polyacrylate, polyacrylamide/acrylate copolymer, poly-DADMAC, poly-OOMAS/acrylamide copolymer and terpolymer polyacrylamide/acrylate/DADMAC concentration of active polymer 10.4% and a Brookfield viscosity equal 774 CPs (measured using a rotor #3 LVT, 30 rpm at 22°C). The composition of the mixture was calculated from the kinetic data and analysis of spectra1H NMR of the mixture during the process. A heterogeneous mixture of polymers were not deposited, not zahustovali and not separated during curing at room temperature for thirty (30) days.

Example 4: obtaining a post-reaction polymer mixture

A heterogeneous mixture of polymers was obtained with the use of the polymers after the reaction. First received three polymer. To obtain polyacrylamide 219.9 net grams of acrylamide from SNF, Riceboro, GA, downloaded in two-liter round bottom flask and diluted with 800 g of deionized water. The mixture was stirred with a speed of 275 rpm and barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes. Thirty (30) minutes added 0.11 g of copper sulfate (II). The reactor was heated to 45°C. and the flask was added 35.6 g of 10% solution of V50 in deionized water. The reaction mixture was heated to 50°C, and it is became very viscous. To reduce the viscosity was added 400 g of deaerated deionized water. After 4 min the flask was added 17.8 g of 10% solution of V50 and the flask was heated to 75°C for one (1) hour. The pH value of the polymer was not installed. The reaction received 1419 solution of polyacrylamide with a concentration of solids of 8.0%.

To obtain a polyacrylic acid 28.1 g of acrylic acid from SNF, Riceboro, GA, was placed in a 1-liter round bottom flask and was diluted with 400 g of deionized water. The mixture was stirred with a speed of 275 rpm and barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes. Thirty (30) minutes, the flask was heated to 45°C. and the flask was added 17.80 g of 10% solution of V50 in deionized water. The reaction was continued at 45°C (with weak heating up to 50°C) for 45 minutes, the pH of the polymer was not installed. The reaction received 420 g of a transparent polyacrylic acid solution containing 63% solids.

To obtain poly-DADMAC 121.4 g of DADMAC from SNF, Riceboro, GA, was loaded into a 1-liter round bottom flask and diluted 538 g of deionized water. The mixture was stirred with a speed of 275 rpm and barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes. Then the reactor was heated to 75°C. and the flask was added from a syringe pump. 13.1 g of 10% solution of V50 in deionized water for another 120 minutes 120 minutes added another aliqu what you 3.3 g of 10% solution of V50 in deionized water, the temperature was raised up to 80°C and kept for 30 minutes the pH Value of the polymer was not installed. The reaction received 664 g of a clear solution of poly-DADMAC content 12.80% solids.

After receiving three polymer, prepared heterogeneous post-reaction mixture of polymers. First 230 g of polyacrylate (7.0 wt.% solids) was slowly mixed with 380 g of the solution of polyacrylamide (8.5 wt.% solids). The resulting mixture was diluted with 420 g of deionized water and vigorously stirred at a speed of 400 rpm Stir the mixture slowly added to 220 g of a solution of poly-DADMAC (16.6 wt.% solids). The precipitated substance is re-dissolved by adding dropwise a 50% NaOH solution, and set the pH of the mixture equal to 7.0.

The obtained stable transparent suspension is a heterogeneous mixture with a concentration of active polymer 11.7 wt.% and a Brookfield viscosity equal to 1200 SP. The mixture contained 19 wt.% polyacrylate, 38 wt.% polyacrylamide and 43 wt.% poly-DADMAC.

Example 5: Synthesis of a heterogeneous mixture of polymers containing hydrate of sodium salt of 4-styrelseledamot (SSA), acrylamide and metolachlor-N-propyltrimethylammonium chloride (MARTHA)

Samples of a heterogeneous mixture of polymers SSA/acrylamide/MARTHA prepared in the following way. Acrylamide from Kemira, Kennesaw, GA, and MARTHA from Sigma Aldrich, St.Louis, MO, was placed in a separate flask and was barbotirovany nitrogen, not aderrasi oxygen, within thirty (30) minutes.

Separately in 500 ml chetyrehosnuju round bottom flask, equipped with a fridge, a mechanical stirrer, a thermocouple with a regulator, tube for ozonation of nitrogen, tube for nitrogen and a heating jacket, added 133.25 g SSA from Sigma Aldrich, St. Louis, MO, and at 23.72 g of deionized water and stirred with a speed of 275 rpm for 30 minutes. Into the flask was brought 242 g of deionized water and stirred with a speed of 275 rpm, barbotine nitrogen, which does not contain oxygen, within thirty (30) minutes.

In a separate 50 ml round bottom flask made 7.45 g of 20% solution of V50 from Wako, Richmond, VA, and was stirred with a speed of 275 rpm, barbotine nitrogen, which does not contain oxygen, within thirty (30) minutes. To SSA added twenty percent (20%) (1.49 g) deaerated V50. Flask of 500 ml was heated to 45°C for 45 minutes under stirring with a speed of 275 rpm

In a 500 ml flask was loaded 36.75 g of a solution of acrylamide and then quickly added 40% (2.98 g) deaerated solution of V50. Flask of 500 ml was heated to 50°C for 45 minutes under stirring with a speed of 275 rpm 45 min added 57.06 g of deaerated solution MARTHA and as quickly as possible 20% (1.49 g) deaerated V50.

Flask of 500 ml was heated to 50°C for 45 minutes under stirring with a speed of 275 rpm

After 45 min the temperature in a 500 ml flask was raised up to 75°C and add the remaining solution V50 (1.49 g). The mixture was heated at 75°C for one (1) hour. The resulting solution was cooled to room temperature. Measured pH of the solution and set pH 7 using sodium hydroxide.

The reaction formed a stable opaque suspension is a heterogeneous mixture of polymers with a concentration of active polymer 15.3% and a Brookfield viscosity equal to 46 CPs (measured using a rotor #63, 50 rpm at 22°C). Identified residual SSA and the monomer is acrylamide, which amounted to less than 2 ppm, This suspension was divided upon dilution and to obtain a homogeneous suspension, suitable for the production of paper, took vigorous stirring.

Example 6: Synthesis of a heterogeneous mixture of polymers in a reverseintroducing the components (compared to example 1)

Samples of a heterogeneous mixture of polymers prepared in the following way. 161.9 g of acrylamide from SNF, Riceboro, GA, and 17.76 g of acrylic acid from Aldrick, St. Louis, MO, was placed in a separate flask. Acrylamide was mixed with 716.6 g of deionized water and 0.11 g of solid copper sulfate (II) from Sigma Aldrich, St.Louis, MO. In both flasks were barbotirovany nitrogen, which does not contain oxygen, within thirty (30) minutes.

Separately in 500 ml chetyrehosnuju round bottom flask, equipped with a two-nozzle with a dropping funnel, 250 ml and a refrigerator with a mechanical stirrer, a thermocouple with a regulator, trubk the th for ozonation of nitrogen, tube for nitrogen and a heating jacket, made 60.68 g DADMAC from SNF, Riceboro, GA, and was stirred with a speed of 275 rpm for 30 min, barbotine nitrogen, not containing oxygen

In a separate 50 ml round bottom flask made a 10% solution of V50 from Wako, Richmond, VA, and was stirred with a speed of 275 rpm, barbotine nitrogen, which does not contain oxygen, within thirty (30) minutes. The syringe pump was placed 9.38 g of deaerated solution of V50 and gave this solution dropwise into a flask of 500 ml within 180 minutes After administration of the entire solution temperature in the flask was maintained at 65°C. under stirring with a speed of 275 rpm

A solution of acrylamide was added in a 500 ml flask and then quickly made 4.69 g of deaerated 10% solution of V50. The flask was cooled to 50°C. and the temperature maintained for one (1) hour under stirring with a speed of 275 rpm - Through one (1) hour in the flask quickly added 17.76 g of acrylic acid and 4.69 g of the solution V50. A temperature of 50°C was maintained for one (1) hour under stirring with a speed of 275 rpm

After one (1) hour, the temperature in a 500 ml flask was raised to 75°C. and added from a syringe pump remaining 4.69 g of V50 solution dropwise within thirty (30) minutes. After you have added all the V50 solution, the flask was heated at 80°C for one (1) hour. The resulting solution was cooled to room temperature. Measured pH of the solution and the Sol diers stopped pH 7.4 with sodium hydroxide.

The reaction formed a light grey viscous suspension is a heterogeneous mixture of polymers with a concentration of active polymer 14.5% and a Brookfield viscosity equal 20100 CPs (measured using a rotor #63, 5 rpm at 22°C). The composition of the mixture calculated on the basis of kinetic data and spectra1H NMR of the mixture during the process. Data1H NMR showed 99.9% conversion of DADMAC in poly-DADMAC and content of less than 1 ppm of unreacted acrylic acid and 253 ppm of unreacted acrylamide. A heterogeneous mixture of polymers not deposited, not thickens and is not shared during curing at room temperature for thirty (30) days.

Example 7: a Method of manufacturing paper with a high ash content in the sheet of paper or cardboard

A heterogeneous mixture of polymers according to the present invention, prepared as in example 2 was used together with the filler is precipitated calcium carbonate in the modification of the cluster of needle-shaped aragonite (ULTRABULK® IIPCC) from Specialty Minerals, Inc., Bethlehem, PA. The average diameter of the filler particles was 3.9 μm. In separate experiments, heterogeneous mixture of polymers according to the present invention was tested on pre-processing of the filler to the manufacture of paper and as an additive to wet the end during the manufacture of paper filled with added before Goethe is agenoy mixture of polymers. In all experiments, the polymer was added in the amount of 0.45 wt.% calculated on dry pulp. Both as a way of introduction has provided excellent quality of the paper.

From the obtained paper cut sheets with a dry weight of 30 wt.% to determine ash content, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood. Fiber pulp to grind to the consistency of grind (sagasti) 450 ml CSF. Other standard additives (all expressed in wt.% from all the dry paper pulp) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny cornstarch ETHYLEX 2015 in the amount of 50 lb/ton from Tate and Lyie, Decatur, IL. The paper was Kalandarishvili in the car until smooth top side 150 Sheffield.

Received the paper of the present invention compared with paper made using the same components and additives, but even with the addition of filler - cluster scalenohedral calcite (SMI ALBACAR® LO RCC) from Specialty Minerals, Inc., Bethlehem, PA, with an average particle diameter of 2.1 μm, the ash content of 20 wt.% calculated on dry pulp without heterogeneous mixture of polymers. The results of the experiment are shown in table 1. Skin is of inventions helped to maintain the stiffness and strength with increasing filler content compared with the control sample ALBACAR® LO RCC with higher filler contents. The pre-treatment of the filler, and additive copolymer in suspension of cellulose helped to preserve the strength of the paper at higher filler contents.

TABLE 1: USE of the PRESENT INVENTION FOR PROCESSING of FILLER
FillerALBACAR® LOPCCULTRABULK® P RCCULTRABULK® II RCCALBACAR ® LOPCC
Chemical processingnoExample 2 - 0.45%Example 2 - 0.45%no
The point of applicationnoThe wet endFillerno
Ash (S) (%)20.929.829.531.0
Stiffness MD Taber (g-force cm)2.492.522.322.21
Stiffness CD Taber (g-force cm) 1.111.061.010.91
The rigidity of the GM Taber (g-force cm)1.661.631.531.42
The GM tensile (lbs/inch)12.6112.1910.819.87
The ZD tensile (psi)75,771.272.667,1

Example 8: Comparison of results of adding the heterogeneous polymer blend and a two-component polymer mixture

The heterogeneous polymer blend of the present invention was obtained as in example 3 and compared with the post-reaction mixture of cationic/anionic polymers. Cationic and anionic polymers were obtained from the same monomers, cationic and anionic, used in the synthesis of a heterogeneous mixture of polymers in example 3, known as PERFORM PC8229 and HERCOBOND 2000, both from Hercules, Inc., Wilmington, DE.

The resulting paper is cut into sheets to determine the ash with a dry weight of 30 wt.%, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood is Sina. Cellulose fibers to grind to sagasti 450 ml CSF. Other standard additives (all expressed in wt.% from all the dry paper pulp) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny cornstarch ETHYLEX 2015 in the amount of 50 lb/ton from Tate and Lyie, Decatur, IL. The paper was Kalandarishvili to achieve smoothness index of the upper side 150 Sheffield. In addition, the paper obtained according to the present invention, compared with paper made using the same components and additives, but with the addition of filler - cluster scalenohedral calcite (SMI ALBACAR® LO RCC) from Specialty Minerals, Inc., Bethlehem, PA, with an average particle diameter of 2.1 μm, 20 wt.% ash calculated on the dry paper weight without heterogeneous mixture of polymers. The results of the experiment are shown in table 2.

At the same smoothness of the upper surface 150 Sheffield in the both treatments polymers improved the extensibility of the paper in the plane and perpendicular to the direction in comparison with the obtained raw paper. Precipitated calcium carbonate in the modification of needle-like aragonite some increased strength compared to precipitated calcium carbonate in modificationsirolimrotease calcite without the addition of polymer. However, in the presence of a heterogeneous polymer compound and filler is precipitated calcium carbonate in the modification of needle-like aragonite - observed the highest values of hardness and total top quality of the received paper.

TABLE 2: COMPARISON of the quality of the PAPER WITH the INTRODUCTION of the MIXTURE AND WITH the INTRODUCTION of TWO COMPONENTS
FillerALBACAR® LOPCCALBACAR® LOPCCULTRABULK®II RCCULTRABULK® II RCCULTRABULK® AND RCA
Chemical processingnonoExample 3-0.45%Perform® RS 0.036% Hercobond® 2000-0 .45%no
ApplicationnonoThe wet endThe wet endno
Ash (S) (%)19.028.828.727.731.9
Stiffness MD Taber (g-force cm)2.292.092.332.182.05
Stiffness CD Taber (g-force cm)0.850.790.960.790.83
The rigidity of the GM Taber (g-force cm)1,391.291.501.321.30
The GM tensile (lbs/inch)12.519,0711.0611.089.45
The ZD tensile (lbs/inch)75,956.664.974.962.2

Example 9: Comparison of the post-reaction mixture of the present invention

A heterogeneous mixture of polymers according to the present invention was synthesized as in example 2, and compared with the post-reaction mixture of the polymers prepared in example 4.

To determine ash received a paper cut is and the leaves with a dry weight of 30 wt.%, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood. Cellulose fibers to grind to sagasti 450 ml CSF. Other standard additives (all expressed in wt.% from all the dry paper pulp) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny cornstarch ETHYLEX 2015 in the amount of 50 lb/ton from Tate and Lyie, Decatur, IL. The paper was Kalandarishvili in the car until smooth top side 150 Sheffield. Furthermore, the paper of the present invention compared with paper made using the same components and additives and filler - cluster scalenohedral calcite (SMI ALBACAR® LO RCC) from Specialty Minerals, Inc., Bethlehem, PA, with an average particle diameter of 2.1 μm, 20 wt.% ash calculated on the dry paper weight without heterogeneous mixture of polymers. The results of the experiment are shown in table 3.

At the same smoothness of the upper side 150 Sheffield in the two ways of processing polymers improved the extensibility of the paper in the plane and perpendicular to the direction in comparison with the obtained raw paper. However, in the presence of a heterogeneous polymer compound together with a filler - precipitated calcium carbonate in the modification of needle-like aragonite - observed the highest values of hardness and total top quality of the received paper.

TABLE 3: COMPARISON PREPARED IN-SITU POLYMER MIXTURE WITH a POST-REACTION HOMOPOLYMER MIXTURE
FillerALBACAR® LO RCAULTRABULK®II RCCULTRABULK® P RCC
Chemical processingNoExample 2 - 0.45% in-situ mixtureExample 4-0.45% Post-reacts. mixture
ApplicationNoThe wet endThe wet end
Ash (S) (%)31.029.830.2
Stiffness MD Taber (g-force cm)2.212.522.37
Gestco the ü CD Taber (g-force cm) 0.911,061.01
Stiffness CD Taber (g-force cm)1.421.631.55
The GM tensile (lbs/inch)9.8712.1911.34
ZD tensile (lbs./square D.)67.171.266.5

Example 10: Effect of a heterogeneous mixture of polymers on increasing or maintaining the runnability of the paper machine

A heterogeneous mixture of polymers were obtained as in the first example, and the method of Noble and Wood paper manual low tide to assess the effect of mixtures on the performance of the paper machine. The mixture of fibers for the experiments consisted of 70 wt.% bleached Kraft fibers hardwood 360 ml CSF mixed with 30 wt.% bleached Kraft fibers soft wood 500 ml CSF. To the mixture of fibers added 20-30 wt.% calculated on dry pulp inorganic filler is calcium carbonate ULTRABULK® II RCC from Specialty Minerals, Inc., Bethlehem, PA. In addition, for comparison made is whether the checklist of ALBABAR® LO RCA but without heterogeneous mixture of polymers. The suspension was diluted to 1 wt.% solids calculated on a dry pulp. The mass of the added standard fillers - 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.02% flocculant PERFORM PC8138 and 0.02% drainage agent PERFORM SP7200 (all percentages are calculated on all dry pulp).

Aliquots of treated and untreated paper pulp used for the manufacture of manual casting square sheets 8x8 inches with a basis weight of 90 lb/3000 by Sheets extruded under standard conditions, but not dried. Each laminated sheet is then laid between two transparent plastic sheets and paper knife cut these sheets into strips of a width of 1 inch. The strips were tested for tensile strength in wet conditions on the Instron apparatus of the type. Then handmade sheets after identical conditions dried for analysis on the solids content of the main mass and ash content. These assessments are conducted TAPPI standard methods.

The increase in ash content in the sheet 17 to 25 wt.% calculated on the dry mass of the obtained paper in combination with a change in the type of filler has led to a 56% decrease in the tensile strength of a dry leaf in that the solids content of the sheet during the extrusion has not changed. The addition of 0.2 wt.% the calculation is as dry pulp heterogeneous mixture of polymers of example 1 has improved the quality of the paper compared to the raw weight by 38%. When processing paper pulp using 0.4 wt.% calculated on dry pulp has a better quality than the raw mass to 65%.

The efficiency of the paper machine is closely associated with cohesive properties damp cloth, leaving a press; the higher the cohesion, the more healthy the paper weight. Adding heterogeneous mixture of polymers according to the present invention has led to increased cohesion of the band which, as expected, are converted to increased efficiency of the paper machine at high ash content in the sheet. The results are presented in table 4.

td align="center"> Control
TABLE 4: IMPROVEMENT of COHESION DAMP CLOTH
ConditionAsh (S)FillerWet stretchingSolids
Units(%)Type(pound-force/inch)(%)
Control16.7ALBACAR LO ® PCC0.9249.9
25.5ULTRABULK ® IIPCC0.4049.7
0.2% example 125.4ULTRABULK ® IIPCC0.6047.1
0.4% example 124.7ULTRABULK ® IIPCC0.7446.3

Example 11: Use of heterogeneous mixtures of polymers to reduce the abrasive properties of suspensions

A heterogeneous mixture of polymers according to the present invention was prepared as in example 1, and evaluated in comparison with untreated filler mixture/suspension and the suspension is treated with 1.5 wt.% calculated on dry weight of suspension two-component poly-OOMAS/acrylate/acrylamide copolymer. When assessing the quality of the inorganic filler used as ALBACAR® SP PCC and ULTRABULK® II RCC, both from Specialty Minerals, Inc., Bethlehem, PA.

Possible abrasion assessed using abrasive tester Einlehner (model T), to determine how the suspension will be ground synthetic mesh paper machine. The degree of abrasion caused by the filler or other additives, and is determined by the weight loss of the test grid. Test with the TKA loses its material in the sliding friction of the rotating element of the test sample in an aqueous suspension of the test filler or pigment. Mass which test grid loses after passing a given distance at a given pressure level is used to compare the wear caused by the test filler or pigment.

The test grid is wound on the rotating element consisting of a ceramic ledges. A rotating element attached to the bottom of the vertical driving rod and is open at the top. Test mesh bonded with a fixed supporting rod and a supporting rod that is wound around the fixed rod and pressed against the rotary abrasion tester due to the weight of the load. Test grid and the rotating element is completely immersed in a suspension of a filler or pigment, found in a glass test cylinder. Suspension penetrates to test the grid through the gaps between the ceramic protrusions of the rotating abrasive element tester by suction between the wire and the rotary abrasion tester. The suspension is thoroughly mixed by rotating element tester with ceramic tabs. The consistency of the suspension pick up in such a way that the weight loss corresponded to the reference sample filler GCC when using both rotating elements of the tester. Outside mesh covered with adhesive tape, and in between the ceramic protrusion and the wire is formed corresponding the adequate film of liquid.

Standard conditions for test abrasion on Einlehner AT include a mass of 1 kg to friction on the grid and the distance 25000 m to move the rotary tester. Rotary tester moves with the velocity of 333 m/min, so that one test lasts 75 minutes Samples of filler was tested with two rotary testers, and end loss of mass (in mg) is the average of the two measurements. The amount of dry sample for testing was 9.5 g for sample #2062 and 8.5 g for sample #2137.

Experiments with suspensions was performed as for ALBACAR® SP PCC and ULTRABULK® II RCC in the following ways:

unhandled suspension, 1.5 wt.% calculated on dry weight of suspension is a heterogeneous mixture of polymers, 1.5 wt.% calculated on the dry weight of the suspension component connection. While the two-component polymer leads only to a slight decrease in the abrasion from the suspension, in the presence of a heterogeneous polymer compound of the present invention, the abrasion from the suspension significantly reduced. The results of different experiments are summarized in table 5.

TABLE 5: the ABRASIVE SLURRY ACCORDING to the EINLEHNER TEST
ALBACAR® SP PCC (mg weight loss)ULTRABULK® II RCC (mg rubbed the mass)
Untreated control9.07.0
Processed as in example 1 (1.5% filler)3.44.1
Perform ®RS processed Hercobond ® 2000 (1.5% filler)8.06.1

Example 12: Use of heterogeneous polymer blends SSA/AM/MAPTAC in the manufacture of paper

A heterogeneous mixture of polymers SSA/AM/MAPTAC was prepared as in example 5, and added to a suspension of cellulose to evaluate properties obtained from this suspension of paper. As the inorganic filler used ALBACAR® LO RCC. Heterogeneous polymer blend was mixed with ALBACAR® LO RCC and mixed with low shear effort at room temperature before adding to the suspension.

To determine the ash obtained paper was produced as in example 7, in the form of sheets with a dry weight of 30 wt.%, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood. Fibers were crushed to sagasti 450 ml CSF. Other standard additives (all expressed in wt.% from the dry paper pulp) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant is PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny cornstarch ETHYLEX 2015 from Tate and Lyie, Decatur, IL, in the amount of 50 lb/tons Paper was Kalandarishvili until smooth top side 150 Sheffield.

Both of the polymer product showed a higher ash content of the paper without loss of strength compared with the control sheet containing 20 wt.% ash. The results of the experiment are shown in table 6.

TABLE 6: comparison of the HETEROGENEOUS MIXTURE of POLYMERS SSA/AM/MAPTAC WITH a HETEROGENEOUS MIXTURE of POLYMERS AA/AM/DADMAC
FillerALBACAR ® LOPCCALBACAR ® LOPCCALBACAR® LOPCCALBACAR ® LOPCC
Chemical processingnonoExample 3-2% relates. RCCExample 5-2% relates. RCC
The point of applicationnonoWill precede. treatment of RCCWill precede. treatment of RCC
Ash (S) (%)21.1 30.726.626.71
Stiffness MD Taber (g-force cm)2.131.792.372.38
Stiffness CD Taber (g-force cm)0.790,690.720.76
The rigidity of the GM Taber (g-force cm)1.301.111.311.35
The GM tensile (lbs/inch)12.1810.2911.4311.89
The ZD tensile (psi)99.072.490.092.6

Example 13: Comparison of the quality of the paper produced with the use of a heterogeneous mixture of polymers and heterogeneous mixture of polymers obtained by introducing the components in reverse order

A heterogeneous mixture of polymers prepared as in example 3, and compared with a heterogeneous mixture of polymers obtained in the reverse order, or as in the example 6, and compared the or the effectiveness of both heterogeneous polymer blends. As the inorganic filler used ULTRABULK® II RCC. In addition, have produced a checklist, not processed ALBACAR® LO RCC.

To determine the ash obtained paper was produced as in example 7, in the form of sheets with a dry weight of 30 wt.%, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood. Fiber to grind to sagasti 450 ml CSF. Other standard additives (all expressed in wt.% from all the dry paper pulp) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny corn, starch ETHYLEX 2015 from Tate and Lyie, Decatur, IL, in the amount of 50 lb/tons Paper was Kalandarishvili until smooth top side 150 Sheffield.

With constant smoothness of the top 150 Sheffield heterogeneous polymer mixture obtained as in example 3, worked better than the heterogeneous polymer blend obtained in reverse order of introduction of the components. Both mixtures gave better results than the untreated control. The results are summarized in table 7.

TABLE 7: comparison of the ACTIVITY of HETEROGENEOUS MIXTURES of POLYMERS PREPARED IN this way ABOUT ATOM INTRODUCING COMPONENTS
FillerALBACAR® LO RCAALBACAR® LOPCCULTRABULK® 1IPCCULTRABULK® press
Chemical processingNoNoExample 6 0.45%Example C 0.45%
The point of applicationNoNoThe wet endThe wet end
Ash (S) (%)20.028.929.529.1
Stiffness MD Taber (g-force cm)2.391.921.941.90
Stiffness CD Taber (g-force cm)1.030.810.850.88
The rigidity of the GM Taber (g-force cm)1.561.251.281.29
Stretching GM (NGF the-force/inch) At 11.648.929.6010.39
The ZD tensile (psi)80.867.975.785.0

Example 14: a Comparison of precipitated calcium carbonates ALBACAR® SP-3 and ULTRABULK® II, used in the manufacture of paper together with a heterogeneous mixture of polymers

A heterogeneous mixture of polymers according to the present invention was prepared as in example 6, and evaluated the properties of the paper obtained by the use of two different fillers - precipitated calcium carbonates in modifications acicular aragonite (ULTRABULK® IIPCC) and cluster scalenohedral calcium carbonate (ALBACAR® SP-3), both from Specialty Minerals, Inc., Bethlehem, PA, Wilmington, DE. Both filler contained particles with an average diameter of 3.9 and 3.0 μm, respectively. As a control we used paper made from a suspension of cellulose containing only inorganic filler.

Paper cut as in example 7, the sheets for the determination of ash with a dry weight of 30 wt.%, using a suspension of cellulose from 70 wt.% bleached hardwood and 30 wt.% bleached soft wood. Fibers were crushed to sagasti 450 ml CSF. Other standard additives (all expressed in wt.% from shabumeni mass) included 0.75% starch Stalok 300 from Tate and Lyie, Decatur, IL, 0.25% alum from General Chemical, Parsippany, NJ, 0.1% Prequel 1000 ASA, 0.015% flocculant PERFORM PC8138 and 0.01% drainage agent PERFORM SP9232, all from Hercules, Inc., Wilmington, Delaware. The press was treated with surface gidroksietilirovanny cornstarch ETHYLEX 2015 from Tate and Lyie, Decatur, IL, in the amount of 50 lb/tons Paper was Kalandarishvili until smooth top side 150 Sheffield. The results of the experiment are shown in table 8 (ALBACAR®) and table 9 (ULTRABULK®).

With constant smoothness of the upper side 150 Sheffield paper obtained from a suspension of cellulose containing ULTRABULK® II RCC or ALBACAR SP-3 RCC and processed heterogeneous mixture of polymers, looked better than untreated paper.

TABLE 8: COMPARISON of the ACTIONS of HETEROGENEOUS POLYMER blends TOGETHER WITH ALBACAR® SP-3 AND the quality of the OBTAINED RAW PAPER
FillerALBACAR® LOPCCALBACAR® LOPCCALBACAR® SP-3 RCAALBACAR® SP-3 RCAALBACAR® SP-3 RCA
Chemical processingNoNoNo Example 3 0.33%Example 3 0.50%
The point of applicationNoNoNoThe wet endThe wet end
Ash (S) (%)21.029.630.429.130.1
Stiffness MD Taber (g-force cm)1.991.601,541.651.68
Stiffness CD Taber (g-force cm)0.810.580.650.670.71
The rigidity of the GM Taber (g-force cm)1.270.971.00 1.051.09
Stretching GM pound-force/inch)9.247.267.277.898.02
The ZD tensile (psi)61.163.069.669.273.2

TABLE 9: ALIGNMENT ACTION HETEROGENEOUS POLYMER blend TOGETHER WITH ULTRABULK® P AND the quality of the OBTAINED RAW PAPER
FillerULTRABULK® II RCCULTRABULK® II RCCULTRABULK® II RCC
Chemical processingnoExample 3 0.33%Example 3 0.50%
The point of applicationnoThe wet endThe wet end
Ash (S) (%) 31.029.528.7
Stiffness MD Taber (g-force cm)1.691.671.70
Stiffness CD Taber (g-force cm)0.610.760.79
The rigidity of the GM Taber (g-force cm)1.021.131.16
The GM tensile (lbs/inch)8.028.508.72
The ZD tensile (psi)69.668.672.8

For specialists in this field it is essential that the above options and examples you can make changes without deviating from the concept in a broad sense. Therefore, it is clear that this invention is not limited to the described specific cases and examples, but may include modifications, similar in spirit and scope to the present invention, as shown in the attached formula.

1. A method of manufacturing a heterogeneous mixture of polymers, including
(a) introducing the solution of the first portion of the initiator of the polymerization and one or more anionic or cationic monomers, the monomers have the same charge;
(b) introducing the solution of the second portion of the polymerization initiator and one or more nonionic monomers;
(c) introducing a third portion of the polymerization initiator and one or more ionic monomers, a charge which is opposite to the charge of the monomers of (a);
(d) the gradual introduction of the fourth portion of the polymerization initiator for the reaction of any remaining monomer with the formation of a heterogeneous mixture of polymers; and
(C) optionally neutralizing the obtained heterogeneous mixture of polymers, while
anionic monomers are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamide methylpropanesulphoacid and (6) mixtures thereof;
cationic monomers are selected from the group that includes: (1) diallyldimethylammonium chloride, (2) acrylonitril the ammonium chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acrylonitrilebutadiene sulfate, (5) methacryloyl ethyltrimethylammonium sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof, and
the nonionic monomers are selected from the group consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkyl is of Alameda, (4) vinylformamide and (5) mixtures thereof.

2. The method according to claim 1, wherein the polymerization initiator is a water-soluble azo initiator.

3. The method according to claim 1, wherein the solution contains 10 to 30 mol.% anionic monomers, 40-80 mol.% non-ionic monomers, and 10 to 30 mol.% cationic monomers.

4. A heterogeneous mixture of polymers, designed to increase the filler content in paper or cardboard, obtained by the method according to claim 1, containing:
(a) one or more anionic polymers derived from monomers which are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic and (6) mixtures thereof;
(b) one or more cationic polymers obtained from monomers chosen from the group including: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acryloyl ethyltrimethylammonium sulfate, (5) methacryloxypropyltrimethoxysilane sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof;
(c) one or more nonionic polymers obtained from monomers chosen from the group consisting of: (1) acrylamide, (2) is macrolide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;
(d) one or more copolymers of at least one anionic monomer and at least one non-ionic monomer, and
(e) one or more copolymers containing at least one cationic monomer and at least one non-ionic monomer.

5. A heterogeneous mixture of polymers according to claim 4, additionally containing:
(f) one or more terpolymers containing at least one anionic monomer, at least one cationic monomer and at least one non-ionic monomer.

6. Method of increasing the filler content of a sheet of paper or paperboard, including:
A) integrating heterogeneous mixture of polymers with filler is precipitated calcium carbonate with the formation of a mixture, the polymer mixture contains:
(a) one or more anionic polymers derived from monomers which are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic and (6) mixtures thereof;
(b) one or more cationic polymers obtained from monomers chosen from the group including: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acryloyl ethyltrimethylammonium sulfate, (5) macromoleculeandthehumanof sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof;
(c) one or more nonionic polymers obtained from monomers chosen from the group consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;
(d) one or more copolymers of at least one anionic monomer and at least one non-ionic monomer;
(e) one or more copolymers containing at least one cationic monomer and at least one non-ionic monomer;
(f) one or more terpolymers containing at least one anionic monomer, at least one cationic monomer and at least one non-ionic monomer;
B) combining the mixture with a suspension of cellulose; and
C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

7. The method according to claim 6, in which the filler is precipitated calcium carbonate is selected from the group consisting of: (1) cluster crystals of acicular aragonite, (2) crystal cluster scalenohedral calcite or (3) mixtures thereof.

8. The method according to claim 6, in which the filler is precipitated calcium carbonate consists of particles with an average diameter of about 2-4 ICRI is N.

9. Method of increasing the filler content of a sheet of paper or paperboard, including:
A) combining either (i) a heterogeneous mixture of polymers, or (ii) the filler is precipitated calcium carbonate with a suspension of cellulose with the formation of the mixture, the polymer mixture contains:
(a) one or more anionic polymers derived from monomers which are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic and (6) mixtures thereof;
(b) one or more cationic polymers obtained from monomers chosen from the group including: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acryloyl ethyltrimethylammonium sulfate, (5) methacryloxypropyltrimethoxysilane sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof;
(c) one or more nonionic polymers obtained from monomers chosen from the group consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;
(d) one or more copolymers of at least one anionic mono the EPA and at least one non-ionic monomer;
(e) one or more copolymers containing at least one cationic monomer and at least one non-ionic monomer;
(f) one or more terpolymers containing at least one anionic monomer, at least one cationic monomer and at least one non-ionic monomer;
B) combining the remaining component (i) or (ii) from step (a) with a mixture of a suspension of cellulose; and
C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

10. The method according to claim 9, in which the filler is precipitated calcium carbonate is selected from the group consisting of: (1) cluster crystals of acicular aragonite, (2) crystal cluster scalenohedral calcite and (3) mixtures thereof.

11. The method according to claim 9, in which the filler is precipitated calcium carbonate - containing particles with an average diameter of about 2-4 microns.

12. Method of increasing the filler content of a sheet of paper or paperboard, including:
A) integrating heterogeneous mixture of polymers with filler is precipitated calcium carbonate with the formation of a mixture, the polymer mixture contains:
(a) one or more anionic polymers derived from monomers which are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidoethyl the sulfonic acids and (6) mixtures thereof;
(b) one or more cationic polymers obtained from monomers chosen from the group including: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (3) methacryloxypropyltrimethoxysilane chloride, (4) acryloyl ethyltrimethylammonium sulfate, (5) methacryloxypropyltrimethoxysilane sulfate, (6) acrylamidophenylboronic chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof;
(c) one or more nonionic polymers obtained from monomers chosen from the group consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;
(d) one or more copolymers of at least one anionic monomer and at least one non-ionic monomer;
(e) one or more copolymers containing at least one cationic monomer and at least one non-ionic monomer.
B) combining the mixture with a suspension of cellulose; and
C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

13. The method according to item 12, in which the filler is precipitated calcium carbonate is selected from the group consisting of: (1) cluster crystals of acicular aragonite, (2) crystal cluster scalenohedral calcium is a and (3) mixtures thereof.

14. The method according to item 12, in which the filler is precipitated calcium carbonate - containing particles with an average diameter of about 2-4 microns.

15. Method of increasing the filler content of a sheet of paper or paperboard, including:
A) combining either (i) a heterogeneous mixture of polymers, or (ii) the filler is precipitated calcium carbonate with a suspension of cellulose with the formation of the mixture, the polymer mixture contains:
(a) one or more anionic polymers derived from monomers which are selected from the group consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrelseledamot, (4) vinylsulfonate, (5) acrylamidophenylboronic and (6) mixtures thereof;
(b) one or more cationic polymers obtained from monomers chosen from the group including: (1) diallyldimethylammonium chloride, (2) acrylonitrilebutadiene chloride, (7) methacrylamidoethylene chloride, (8) nekvotirovannoe form(2)-(7), (9) vinylformamide (later hydrolyzable in vinylamine) and (10) mixtures thereof;
(c) one or more nonionic polymers obtained from monomers chosen from the group consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylate, (4) vinylformamide and (5) mixtures thereof;
(d) one or more copolymers of at least one anionic monomer and at least one nonionic m is number;
(e) one or more copolymers containing at least one cationic monomer and at least one non-ionic monomer;
B) combining the remaining component (i) or (ii)from stage (a) with a mixture of a suspension of cellulose; and
C) processing the mixture of a suspension of cellulose with the formation of a sheet of paper or cardboard.

16. The method according to item 15, in which the filler is precipitated calcium carbonate is selected from the group consisting of: (1) cluster crystals of acicular aragonite, (2) crystal cluster scalenohedral calcite and (3) mixtures thereof.

17. The method according to clause 16, in which the filler is precipitated calcium carbonate - containing particles with an average diameter of about 2-4 microns.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention can be applied in chemical and pulp and paper industry. Silicon-dioxide-based sol has concentration of soluble silicon dioxide is lower than approximately 800 mg of SiO2/l, SiO2 content at least 3 wt %, electric conductivity at least approximately 2.0 mS/cm and S-parameter is lower than approximately 50%. Method of obtaining silicon dioxide-based sol includes processing of aqueous solution of alkali metal silicate by electrodialysis with further acidification of electrodialysed sol to pH from approximately 5.0 to approximately 10.

EFFECT: silicon dioxide-based sol is applied as flocculant, as well as additive in paper production.

14 cl, 8 tbl

FIELD: textile; paper.

SUBSTANCE: composition contains a fibrous mixture from chemical and thermomechanical mass and cellulose. The fibrous mixture contains birch leached chemical and thermomechanical mass with extent of grinding 60-125 ml (CSF) and cellulose with grinding extent of 350-500 ml (CSF) at the specified ratio of components. The cellulose in the fibrous mixture is a leached pine sulfate cellulose and/or pine sulphite cellulose, or pine cellulose, and/or leaf cellulose.

EFFECT: expansion of leaf-bearing soft woods due to using birch leached chemical and thermomechanical mass to prepare a fibrous semi-finished product to produce paper with high physical mechanical indices to ensure extent of whiteness.

3 cl, 1 tbl

FIELD: textile, paper.

SUBSTANCE: method includes provision of a thick mixture of cellulose suspension, which contains a filler. The thick suspension mass is dissolved to form a diluted mix of suspension, in which the filler is available in amount of at least 10 wt % in terms of dry mass of dissolved suspension mix. The thick mixture of suspension and/or dissolved mix are flocculated. Polymer system of retention/dehydration is used in flocculation. The dissolved mixture of suspension is dehydrated on a mesh to form a sheet, and then the sheet is dried. In this method the polymer system of retention/dehydration contains the following: i) a water-soluble branched anion-active polymer and ii) a water-soluble cation-active or amphoteric polymer. The anion-active polymer is available in the thick mixture or in the dissolved mixture of suspension prior to addition of cation-active or amphoteric polymer.

EFFECT: improved retention of ash relative to complete retention with higher quality of paper.

16 cl, 21 dwg, 32 tbl, 8 ex

FIELD: textile, paper.

SUBSTANCE: method includes provision of a thick mixture of suspension, which contains wood mass and a filler. The thick suspension mix is dissolved to form a diluted mix of suspension, in which the filler is available in amount of at least 10 wt % in terms of dry mass of dissolved suspension mix. The thick mix and/or dissolved mix of the suspension are flocculated, using a polymer system of retention/dehydration. The dissolved mixture of suspension is dehydrated on a sieve to form a sheet, and then the sheet is dried. The polymer system of retention/dehydration contains the following: i) a water-soluble branched anion-active polymer and ii) a water-soluble cation-active or amphoteric polymer. The method may be realised on paper-making machines of quick dehydration, such as GAP former.

EFFECT: improved retention of ash with reduction of dehydration.

16 cl, 26 dwg, 46 tbl, 16 ex

FIELD: textile, paper.

SUBSTANCE: method includes moistening pulp lap with water solution of sodium salt of carboxymethylcellulose (NaCMC), included into composition of the paste made of a filler (chalk), mixed with a solution of NaCMC at the filler ratio of NaCMC equal to 100:(1-2). Production of moisture-saturated air suspension of fibres with filler from it. Forming a fibrous later on a shaping mesh. Moistening of a fibrous layer between two clothes, pressing and drying of a paper leaf. The filler is added as a paste, which contains 30% of dry substance. Moistening of a fibrous layer prior to pressing is carried out with a starch solution with concentration of 0.7-1.3%.

EFFECT: increased retention of filler in paper at simultaneous increase of paper strength index.

3 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: aqueous polysilicate composition is meant for producing paper and cardboard and can be used in pulp and paper industry. The aqueous polysilicate composition contains a component based on polysilicate microgel combined with particles obtained from colloidal polysilicate. The method of preparing the aqueous polysilicate composition involves mixing aqueous colloidal polysilicate with an aqueous phase of polysilicate microgel. This composition or a composition obtained using the method described above can be used as a flocculant when producing paper and cardboard. The method of producing paper or cardboard involves preparation of a cellulose suspension and flocculation of said suspension using a flocculation system containing said polysilicate composition. The suspension is then drained on a mesh to form a sheet which is then dried.

EFFECT: high efficiency of the disclosed aqueous polysilicate composition owing to improved holding or draining when making paper or cardboard, as well as stability thereof during storage.

24 cl, 11 tbl, 3 ex, 9 dwg

FIELD: textile, paper.

SUBSTANCE: cellulose product comprises thermoplastic microspheres and a charged aromatic acrylamide polymer. The method to produce a cellulose product includes provision of an aqueous solution of suspension that contains cellulose fibres. Addition of thermoplastic microspheres and the charged aromatic acrylamide polymer into the suspension, and dehydration of the produced suspension. Thus made cellulose product may be used as a cardboard for liquid packing.

EFFECT: reduced porosity of a cellulose product as its volume increases and improved resistance of a wick edge to penetration of aqueous liquids for cellulose products.

25 cl, 3 tbl, 4 ex

FIELD: textile, paper.

SUBSTANCE: method of filler treatment includes formation of a mixture of an aqueous suspension of filler and aqueous anion latex. The latter is a dispersion of acrylic polymer with vitrification temperature (T v) from - 3 to 50°C. This mix is mixed with water at the temperature that is higher than T v of latex, at the same time the specified water has temperature of 40-98°C. The specified suspension of the filler comprises a solid disperse filler selected from the group containing kaolin clay, ground calcium carbonate, deposited calcium carbonate, deposited calcium sulfate, talc and mix of two or more of them. The specified acrylic polymer is selected from the group containing copolymers n-butylacrylate-acrylonitrile-sterol and copolymers n-butylacrylate-sterol. The aqueous composition of the filler contains the solid dispersed filler specified above with solid particles of anion latex polymer specified above and adsorbed on them, in aqueous carrier. The treated filler contains the solid dispersed filler specified above with solid particles of anion latex polymer specified above and adsorbed on them. The pulp charge contains pulp fibres and the solid dispersed filler specified above with solid particles of anion latex polymer specified above and adsorbed on it, in aqueous carrier. Method to make paper from the above specified pulp charge containing pulp fibres. The paper product made of pulp fibres and solid disperse filler, where the specified filler has solid particles of anion latex polymer specified above absorbed on it, with size of solid polymer particles of 30-200 nm and in amount of 1-100 kg of latex per 1 t of filler relative to dry mass of solid substances of latex and filler, and the specified filler has average size of particles of 0.1-30 mcm.

EFFECT: improved retention of the filler, continuous execution of the filler treatment method to improve fixation of anion latex on the filler for a short period of time due to irreversible fixation of anion latexes on particles of the filler and time stability of aggregated filler suspension, latex-treated deposited calcium carbonate is more acid-resistant, and when used to make paper from wood mass under neutral conditions less acid is required to control pH.

21 cl, 14 dwg, 8 ex

FIELD: textile, paper.

SUBSTANCE: method includes dissolution of cellulose and its grinding down to specified extent of grinding. Preparation of the first dispersion with application of return water, containing fibres of microcrystal cellulose, produced by its grinding in mixture with titanium dioxide and calcium hydroxide in specified amount. The second dispersion is prepared from cellulose fibres with application of return water. Then the first suspension is mixed with the second, and produced mixture is treated with carbon dioxide. In case of this treatment calcium hydroxide under action of carbon dioxide results in production of chemically deposited chalk and production of paper mass at specified ratio of components. Grinding of microcrystalline cellulose in mixture with titanium dioxide and calcium hydroxide is carried out in vibration mill with provision of impact and wear effect at mixture.

EFFECT: increased extent of fillers retention in paper, improvement of its printing properties, provision of possibility to vary bulk and porosity of paper, provision of possibility to use fully closed cycle of return water.

1 tbl, 8 ex

FIELD: textile, paper.

SUBSTANCE: according to one version, method includes provision of aqueous suspension that contains cellulose fibres. Addition of cation polysaccharide and polymer P2, which is an anion polymer, to produced suspension after all points of high polymer P1 shearing force, and P1 polymer is an anion polymer. Then water is removed from produced suspension to form paper. According to the other version, auxiliary agents are added for drainage and retention to produced suspension of cellulose fibres after all points of high shearing force. The latter are represented by a cation polysaccharide and polymer P2, being an anion polymer.

EFFECT: improved drainage without deterioration in retention and forming of paper, increased speed of paper-making machine and application of lower doses of polymer.

34 cl, 5 tbl, 5 ex

FIELD: textile, paper.

SUBSTANCE: cellulose product comprises thermoplastic microspheres and a charged aromatic acrylamide polymer. The method to produce a cellulose product includes provision of an aqueous solution of suspension that contains cellulose fibres. Addition of thermoplastic microspheres and the charged aromatic acrylamide polymer into the suspension, and dehydration of the produced suspension. Thus made cellulose product may be used as a cardboard for liquid packing.

EFFECT: reduced porosity of a cellulose product as its volume increases and improved resistance of a wick edge to penetration of aqueous liquids for cellulose products.

25 cl, 3 tbl, 4 ex

Composition // 2347030

FIELD: textiles; paper.

SUBSTANCE: composition is meant for improving the softness of paper products. Composition includes: (i) oil, fat or wax; (ii) at least one non-ionic surfactant; (iii) at least one anion compound, selected from anionic micro-particles and anionic surfactant; (iv) at least one polymer, which is a cation, non-ionic or amphoteric, where the non-ionic surfactant is added to the amount from about 60 to 1000 weight fractions for 100 weight fractions of the polymer. Composition is used in the method of manufacturing paper (versions). Method includes adding the mentioned composition to a cellulose suspension or to a moist or dry paper fabric.

EFFECT: increase in the quality of the paper products due to the increase in its softness, low resistance to tearing and high speed of getting wet and reduction in energy for pulping.

22 cl, 9 tbl, 9 ex

FIELD: textiles; paper.

SUBSTANCE: method (versions) concerns manufacture of paper and can be used in the paper and pulp industry. Method includes (i) providing a water suspension, which contains cellulose fibres; (ii) adding to the suspension after all the stages of strong shearing action of the first polymer, which is a cationic polymer; a second polymer and a third polymer, which is an organic or inorganic anionic polymer; and (iii) dehydration of the obtained suspension for forming paper.

EFFECT: improvement in the drainage and retention for all types of paper stock, increasing the speed of the papermaking machine, using low doses of polymers, improving the method of paper manufacturing and increasing the economic efficiency of the process.

16 cl, 7 tbl, 7 ex

FIELD: polymers.

SUBSTANCE: invention relates to method for production of two-component polymer binding agent for fibrous sheet. Said interpolyelectrolitic complex-forming agent includes anionic polymer and cationic polymer each having molecular mass between 1000 and 900000 g/mol. Complex has positive charge of about 6-12 meqv/g. Molecular ratio of total polyanion acidic groups to total number of polycationic groups is from 10:1 to 1,1:1, and charge ratio of polyanion to polycation is about 1:1.

EFFECT: binding agent of improved quality; panel of increased strength and endurance.

28 cl, 7 dwg, 6 tbl, 10 ex

FIELD: production of paper and paper products in pulp-and-paper industry.

SUBSTANCE: method involves adding effective amounts of at least one cation-active polymer coagulant or inorganic coagulant with following adding of material consisting of microparticles, wherein pulp contains cellulose produced at least partly from processed paper products. Coagulant used is of natural or synthetic origin. Material based on microparticles is, for example, bentonite clay, network polymer, colloidal silicon, or polysilicate.

EFFECT: increased efficiency in reducing of white resin sedimentation.

17 cl, 2 dwg, 2 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: cellulose product contains clay having stacking of atomic planes 2R2. Product represents paper of fibrous pulp, while clay has cationic nature. Preparation of product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding clay having stacking of atomic planes 2R2.to suspension; and dehydrating thus prepared suspension. Another method of preparing cellulose product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding cationic clay to suspension; adding one or several draining auxiliary substances enhancing retention of filler and containing at least one cationic polymer; and dehydrating thus prepared suspension.

EFFECT: reduced interfering and harmful substance in cellulose suspension and enhanced retention of filler, dehydrating agents, and sizing agents.

27 cl, 14 tbl, 13 ex

FIELD: pulp-and-paper industry, in particular paper or board production.

SUBSTANCE: claimed method includes providing of slurry containing cellulose fiber and at least sizing agent interacting with cellulose. Sizing agent is selected from group containing ketene dimmers and acid anhydrides. Cationic vinyl polymer obtained by additional polymerization, containing aromatic units and anionic vinyl polymer obtained by additional polymerization and having molecular mass from 6000-100000 are introduced into slurry. Then obtained slurry is dehydrated and paper leaf is formed.

EFFECT: increased effectiveness of sizing, dehydration and retention.

11 cl, 3 tbl, 2 ex

The invention relates to the manufacture of paper, and more particularly, to a method of making paper, which paper add weight cationic organic polymer containing a hydrophobic group and an anionic material microecology

The invention relates to methods of making paper, and particularly relates to such methods that involve the use of water-soluble polysilicate microgels, especially polyaluminosilicate microgels and aluminiumand polysilicate microgels as auxiliaries to improve uderzhivaemoi filler and enhance dewatering

FIELD: textile, paper.

SUBSTANCE: according to one version, method includes provision of aqueous suspension that contains cellulose fibres. Addition of cation polysaccharide and polymer P2, which is an anion polymer, to produced suspension after all points of high polymer P1 shearing force, and P1 polymer is an anion polymer. Then water is removed from produced suspension to form paper. According to the other version, auxiliary agents are added for drainage and retention to produced suspension of cellulose fibres after all points of high shearing force. The latter are represented by a cation polysaccharide and polymer P2, being an anion polymer.

EFFECT: improved drainage without deterioration in retention and forming of paper, increased speed of paper-making machine and application of lower doses of polymer.

34 cl, 5 tbl, 5 ex

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