Composition of filler

FIELD: textiles, paper.

SUBSTANCE: composition comprises: a) a filler, b) a cationic inorganic compound - polyaluminumchloride, c) a cationic organic compound, and d) anionic polysaccharide. The filler is present in an amount of at least about 1% by weight, based on the total weight of the composition. Anionic polysaccharide is present in an amount from about 1 to about 100 kg/ton based on the weight of the filler. The composition is substantially free of fibers. Filler composition of the version contains the components a), b), c) and d), as defined above. The only difference is that the component c) is a cationic polyamine condensation polymer, and the component d) has a degree of substitution of stoichiometrically excess anionic groups of up to about 0.65. At that each of b) and c) components present in an amount from about 0 to about 30 kg/ton based on the weight of the filler. At that the composition comprises at least one of b) and c) components. Methods of obtaining compositions of filler comprise mixing a), b), c) and d), as defined above. The invention also relates to a filler composition, which is obtained by this method, an application of the filler composition as an additive to an aqueous suspension of cellulose in the production process of paper and to manufacturing paper comprising adding a filler composition to an aqueous suspension of cellulose. The invention also relates to a paper obtained with this method, and paper comprising the filler composition.

EFFECT: improvement of composition.

35 cl, 1 dwg

 

The technical field to which the invention relates.

The present invention relates to the composition of the filler, the method of obtaining the composition of the filler, various applications of the compositions of filler, including the use as an additive in the manufacture of paper, a method for producing paper, in which the composition of the filler added to the aqueous pulp suspension, the paper obtained by this method, and the various applications of paper obtained by this method.

Prior art

Fillers and compositions of fillers are well known and widely used in the production processes in the manufacture of paper, in order to reduce the cost of paper by replacing more expensive natural cellulose fibers less expensive filler. Fillers also provide an opportunity to improve certain properties of paper, such as surface smoothness, the suitability for printing and optical characteristics, such as opacity and whiteness. However, other properties of the paper can deteriorate. For example, paper with filler typically exhibits lower strength properties compared with paper that does not contain fillers.

Would be useful to be able to create a composition of filler, which will give the paper strongly improved the design and engineering and other properties. Would also be useful to be able to develop a method of obtaining such a composition filler. In addition, it would be useful to have a paper with a filler exhibiting improved strength and other characteristics. Also would be preferential development of an improved method of producing paper with filler.

The invention

The present invention relates to a filler composition containing:

a) a filler,

b) a cationic inorganic compound

(C) cationic organic compound, and

d) anionic polysaccharide,

where the filler is present in amounts of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of from about 1 to about 100 kg/ton, based on the weight of filler, and where the composition essentially contains no fiber.

The present invention also relates to a filler composition containing:

a) a filler,

b) a cationic inorganic compound

(C) cationic organic compound, and

d) anionic polysaccharide,

where the filler is present in amounts of at least about 1% by weight, based on the total weight of the composition, each of the cationic inorganic and organic compounds are present in an amount of from about 0 to about 30 kg/ton, is eschete on the weight of filler, moreover, the composition comprises at least one of the cationic inorganic and organic compounds and anionic polysaccharide has a degree of substitution stoichiometric excess anionic groups up to about 0.65 is.

Further, the present invention relates to a method for producing a filler composition comprising a mixture

a) filler

b) cationic inorganic compounds

(C) cationic organic compounds and

d) anionic polysaccharide,

moreover, in the resulting composition of the filler, the filler is present in amounts of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of from about 1 to about 100 kg/ton, based on the weight of the filler, and in which the mixing carry out essentially in the absence of fibers.

Further, the present invention relates to a method for producing a filler composition comprising a mixture

a) filler

b) cationic inorganic compounds

(C) cationic organic compounds and

d) anionic polysaccharide,

moreover, in the resulting composition of the filler, the filler is present in amounts of at least about 1% by weight, based on the total weight of the composition, each of the cationic inorganic and organic compounds are present in amounts which the firmness of from about 0 to about 30 kg/ton, based on the weight of the filler, the composition comprises at least one of the cationic inorganic and organic compounds and anionic polysaccharide has a degree of substitution stoichiometric excess anionic groups up to about 0.65 is.

The present invention also relates to the composition of the filler, which can be obtained by the method as described in this specification.

The present invention also relates to the use of a composition of the filler, as described herein, as an additive in the paper production process.

The invention further relates to a method for producing paper comprising adding the composition of the filler, as described herein, to the pulp slurry and draining the obtained suspension.

Further, the invention relates to a paper, which are obtained by the process as described in this description, the paper includes a filler composition, as described herein, and various application options paper.

Detailed description of the invention

In accordance with the present invention includes a composition of filler that can be used in numerous application forms, and which is particularly suitable for use as an additive in the manufacture of paper, and which gives the paper improved rochestie properties. For example, at constant levels of filler filled paper containing a filler composition of the present invention, exhibits improved strength characteristics. At constant strength characteristics of paper filled paper containing a filler composition of the present invention can have significantly higher levels of filler. Strength characteristics of paper with filler of the present invention, which essentially saved or improved include tensile strength, hardness, tensile index tensile strength at break, Flexural strength, z-strength (the strength of internal communications), Scott Bond (resistance to delamination), wax pick (surface durability). In addition, substantially preserved and/or improved characteristics dusting and education paper down. Additional benefits associated with the filler composition of the present invention when used in the production of paper, include good or better suitability of the paper for printing machine, good compatibility with the means for facilitating drainage and retention of fine particles, good or improved retention of filler and additives, making the white paper may have low levels of such good cos estimate with sizing agents, that is a good or improved action of the sizing means, in particular in combination with the sizing of paper material (internal) and superficial (outer) sizing, easy calendering, which can be applied to low pressure to obtain a good smooth paper, and energy saving opportunities, in particular in the drying section of the papermaking machine. Further, the composition of the filler can be obtained through simple, effective and universal method using conventional in the manufacture of paper fillers and other inexpensive materials. Accordingly, the present invention provides the ability to increase the filler content in the paper to obtain the full paper with improved strength and other properties and to create an improved method of manufacture of paper, thereby obtaining an improved paper product and economic benefits.

Further, in relation to other uses than the production of paper, the filler composition of the present invention can be used to increase the strength (strength in wet state) of traditional and modern ceramic materials, powder compositions, as well as in powder metallurgy. When superior strength in a wet state, the handling of goods prior to firing or sintering is to ensure less damage to the products, and products with high strength in wet condition will be easier or better to withstand machining with preservation of sizes and shapes.

The composition according to the present invention contains a filler. The term "filler"as used in this description, is intended to include synthetic or natural mineral fillers and pigments, including porous, friable, plastic and expandable fillers and pigments. Examples of suitable fillers of the present invention include wollastonite, kaolinites, for example, kaolin, porcelain clay, titanium dioxide, gypsum, telicity, for example, talc, hydrotalcite, manasseite, pyroaurite, serenit, static, Barberton, takovite, revisit, desotelle, motukoreaite, vermland, maxaret, Coalinga, chloromelanite, carbidic, honest, woodwardite, iowait, hidrogenesse and mundata, oxides of silicon, for example, precipitated silica and precipitated aluminosilicates, smectites, such as montmorillonite/bentonite, hectorite, Badelt, nontronite and saponite, hydrogenated aluminum oxide (trihydroxide aluminum, calcium sulfate, barium sulfate, calcium oxalate, as well as natural and synthetic calcium carbonates. Examples of suitable natural and synthetic calcium carbonates include chalk, crushed marble, ground calcium carbonate (GCC) and USAID the config calcium carbonate (PCC), including any of a variety of existing crystalline forms or morphology, such as calcite rhombohedral, prismatic, tabular, cuboidal and scalenohedral forms, and aragonite needle shape. A suitable filler is kaolin or calcium carbonate such as ground calcium carbonate and precipitated calcium carbonate.

The composition according to the present invention may contain one or more cationic inorganic compounds. Examples of suitable cationic inorganic compounds include inorganic one-, two - and polyvalent cations and polyelectrolytes, such as aluminum compounds. Examples of suitable aluminum compounds include alum (aluminum sulfate), aluminates such as sodium aluminate and potassium, and semi-aluminum compounds, such as polyaluminosilicate, sulfates of polyalanine, silicate-sulphate of polyamine and mixtures thereof. Preferably the cationic inorganic compound is polyaluminium.

The composition according to the present invention may include one or more cationic organic compounds. Typically, the cationic organic compound is soluble or dispersible in water, preferably water-soluble. Cationic organic compound may be a synthetic and have a natural origin is a group of what dowry cationic properties. Examples of suitable cationic organic compounds include cationic organic polymers, for example, condensation polymers of the type cationic polyamides, cationic of polyamidoamine, cationic polyethylenimine and cationic dicyandiamide polymers, cationic polymers obtained by polyprionidae vinyl derivatives, such as cationic monomer with ethylene unsaturation, or a mixture of monomers containing at least one cationic monomer, such as cationic polymers based on acrylamide, cationic polymers based on acrylate, cationic polymers based on vinylamine/vinylformamide and cationic polymers based on diallyldimethylammoniumchloride. Examples of suitable cationic monomers with ethylene unsaturation include dialkylaminoalkyl(meth)acrylates and dialkylaminoalkyl(meth)acrylamide, preferably in quaternionic form, and diallyldimethylammoniumchloride (DADMAC). Cationic polymers of the monomer with ethylene unsaturation is usually derived from a cationic monomer in an amount of from about 10 to 100 mole percent of another monomer in an amount of from 0 to 90 molar percent, and the sum of the percentages is 100. The amount of cationic monomer is usually at least 80 molar percent, mainly 100 molar% of the LLC.

Cationic organic compound typically has a mass-average molecular weight of at least about 1000, mostly at least about 2,000 and preferably at least about 5000. Usually mass-average molecular weight is up to about 4000000, mainly down to about 2000000 and preferably up to about 700000. The charge density of the cationic organic compound is usually at least about 0.2 mEq/g, mostly at least about 1 mEq/g and usually the charge density is up to about 15 mEq/g, mainly up to about 10 mEq/g

The composition according to the present invention contains an anionic polysaccharide. Predominantly anionic polysaccharide is dispersible in water or water-soluble, preferably water-soluble or at least partially soluble in water. Anionic polysaccharide contains anionic groups which may be present initially and/or can be introduced by chemical treatment of the polysaccharide. Examples of anionic in nature polysaccharides include natural potato starch, which contains a large number of covalently linked phosphate complex monoatomic groups. Anionic polysaccharide may also contain cationic groups to such an extent that the polysaccharide in General, the two which is anionic, or has a result anionic charge, that is, the number of anionic groups exceeds the number of cationic groups, or the degree of substitution of anionic groups is higher than the degree of substitution of cationic groups. In a preferred embodiment, the anionic polysaccharide contains no or essentially does not contain cationic groups.

Examples of suitable anionic groups include carboxylate, for example carboxialkilnuyu, sulphate, sulphonate, for example sulfoalkyl, phosphate and phosphonate groups, where the alkyl group may be a methyl, ethyl, various groups or their mixture, predominantly methyl; predominantly anionic polysaccharide contains anionic group containing a carboxylate group, for example carboxialkilnuyu group. The counterion for the anionic group is usually the ion of an alkali metal or alkaline earth metal, preferably sodium. The anionic groups can also exist in its acid form, for which the corresponding anionic groups form in the aquatic environment.

Examples of suitable cationic groups include salts of amines, mainly salts of tertiary amines, and Quaternary ammonium groups, preferably Quaternary ammonium groups. The substituents attached to the nitrogen atom of amine and Quaternary ammonium groups may be the same or different, and could the t to be selected from alkyl, cycloalkyl and alkoxyalkyl groups, and one, two or more substituents together with the nitrogen atom can form a heterocyclic ring. Substituents independently of one another typically contain from 1 to about 24 carbon atoms, preferably from 1 to about 8 carbon atoms. The nitrogen atom of the cationic group may be attached to the polysaccharide through a chain of atoms, which mainly consists of carbon atoms and hydrogen and optionally oxygen atoms (O) and/or nitrogen (N). Typically, the chain of atoms is alkylenes group with carbon atoms of 2 to 18, and preferably from 2 to 8, optionally with the inclusion of a chain or attach as substituents one or more heteroatoms, such as O or N, forming, for example, accelerograph or hydroxypropranolol group. Preferred anionic polysaccharides containing cationic groups include groups obtained by the reaction of anionic polysaccharide with quaternization reagent selected from 2,3-epoxypropyltrimethylammonium, 3-chloro-2-hydroxypropyltrimethylammonium and mixtures thereof.

Anionic polysaccharide according to the present invention can contain non-ionic groups, such as alkyl or hydroxyalkyl group, for example hydroxymethylene, hydroxyethylene, hydroxyproline, hydroxybutyl group and see is si, for example hydroxytrimethylene, hydroxypropylmethyl, hydroxystilbamidine, hydroxyethylamine, hydroxypropoxy and the like. In a preferred variant of the invention, the anionic polysaccharide contains both anionic and non-ionic group.

Examples of suitable anionic polysaccharides of the present invention include glucans, such as dextrans and cellulose, galactomannans, such as guar gum, chitina, chitosans, glikana, galactanes, xanthan gums, pectins, mannans, dextrins, alginates and carragenine. Examples of suitable starches include potato, corn, wheat, tapioca, rice starch, starch from waxy maize, etc. Preferably anionic polysaccharide selected from cellulose derivatives, preferably anionic ethers of cellulose. Examples of suitable anionic polysaccharides and cellulose derivatives include karboksimetsiltsellyulozy, for example carboxymethylcellulose, carboximetilzellulozu, carboximetilzellulozu, sulfobacillus, karboksimetiltselljuloza ("CM-BORE"), carboxymethyl cellulose in which the cellulose is substituted by one or more non-ionic substituents, preferably carboxymethylcellulose ("CMC"). Examples of suitable cellulose derivatives include those such as described in U.S. patent 4940785, to the activities included in this description by reference.

Anionic polysaccharide typically has a degree of substitution stoichiometric excess of anionic groups (“DSNA”at the level of at least about 0,001 or at least about 0.01, mostly at least about 0.05, or at least about 0.10 to, and preferably at least about 0.15. The degree of substitution of anionic polysaccharide stoichiometric excess of anionic groups is usually up to about 1.0, or up to about 0.75, mainly down to about 0,65, or up to about 0.50 and preferably up to about 0.45. When anionic polysaccharide does not contain cationic groups, it has a degree of substitution of anionic groups (“DSA”), which is equal to the degree of substitution stoichiometric excess anionic groups, as described herein, i.e. DSA=DSNA.

Anionic polysaccharide typically has a mass-average molecular weight of at least 2000 daltons, or at least about 5,000 daltons, mostly at least 20000 daltons, or at least about 50,000 daltons and the average molecular weight is typically up to about 30000000 daltons, or up to about 25000000 Dalton, mainly up to about 1,000,000 daltons, or up to about 500,000 daltons.

The present composition of the filler is preferably an aqueous composition, i.e. preferably it contains the water. Of course, in the composition of the filler may also be present other components, such as biocides, preservatives, by-products of processes of formation of filler, cationic inorganic and organic compounds and anionic polysaccharide, for example, salt and a dispersant, etc. In a preferred embodiment, the filler composition essentially contains no fibers and fibrils of cellulose or lignocellulose. In another preferred embodiment, the filler composition essentially contains no fiber length of at least about 4 mm In yet another more preferred embodiment, the filler composition contains fibers or fibrils of cellulose or lignocellulose. In another more preferred embodiment, the filler composition essentially contains no cationic starch.

The components of the composition of the filler containing the filler, the cationic inorganic and organic compounds and anionic polysaccharide may be present in the composition of the filler in amounts which can vary within wide limits depending on, inter alia, on the type and number of components, intended use, desired savings and desired strength of paper, etc.

The filler is typically present is the duty to regulate the composition of the filler in the amount of at least about 1% by weight, calculated on the total weight of the composition, mainly at least about 2% by weight or at least about 5% by weight and preferably at least about 10% by weight. The filler is typically present in amounts of up to 99% by weight, based on the total weight of the composition, mainly up to about 75% by weight or up to about 50% by weight and preferably up to about 45% by weight.

According to one variant of implementation, the cationic inorganic compound in the composition of the filler is not present. However, if it is present, the cationic inorganic compound is typically present in the composition of the filler in the amount of at least about 0.01 kg/ton, based on the weight of filler, mostly at least about 0.1 kg/ton, or at least about 0.5 kg/ton and preferably at least about 1.0 kg/ton. Further, if such is present, the cationic inorganic compound is typically present in the composition of the filler in the amount of up to about 30 kg/ton, based on the weight of filler, mainly up to about 15 kg/ton, or up to about 10 kg/ton and preferably up to about 5 kg/ton. When the cationic inorganic compound is a compound of aluminum, as defined in the description of the amount calculated as an oxide of aluminum (Al O3), based on the weight of the filler.

According to one variant of implementation of the cationic organic compound in the composition of the filler is not present. However, if it is present, the cationic organic compound is typically in the composition of the filler in the amount of at least about 0.01 kg/ton, based on the weight of filler, mostly at least about 0.1 kg/ton, or at least about 0.5 kg/ton and preferably at least about 1.0 kg/ton. Further, if such is present, the cationic organic compound is typically in the composition of the filler in the amount of up to about 30 kg/ton, based on the weight of filler, mainly up to about 15 kg/ton, or up to about 10 kg/ton, and preferably up to about 5 kg/ton.

According to one variant of implementation of the anionic polysaccharide is typically present in the composition of the filler in the amount of at least about 1 kg/ton, based on the weight of filler, mostly at least about 2 kg/ton, or at least about 3 kg/ton and preferably at least about 5 kg/ton. Anionic polysaccharide is typically present in the composition of the filler in the amount of up to about 100 kg/ton, based on the weight of filler, mainly up to about 50 kg/ton, or up to about 30 kg/ton, and so doctitle up to about 20 kg/ton.

The composition of the filler typically has a mass ratio of cationic(data) retainer(General) funds(CTV) to the anionic polysaccharide is from about 10:1 to about 1:1000, mainly from about 2:1 to about 1:100 and preferably from about 1:1 to about 1:40. According to one variant of implementation of cationic(basic) retainer(existing) vehicle(CTV) includes(ut) cationic inorganic compound and/or a cationic organic compound.

The filler composition of the present invention may not contain water. If water is present, it is usually found in the composition of the filler in an amount of from about 1% by weight, based on the total weight of the composition, mainly at least about 25% by weight or at least about 50% by weight and preferably at least about 55% by weight. If water is present, it is usually in the amount of up to about 99% by weight, based on the total weight of the composition, mainly up to about 98% by weight or up to about 95% by weight and preferably up to about 90% by weight, with the sum of the percentages is 100.

The composition of the filler may have a fiber content from about 0 to about 5% by weight, based on the composition. Preferably the composition of the filler comprises fibers or fibrils of cellulose or lignocellulose in the amount of less than about 1% by weight, based on EmOC is lytel.

The present invention also relates to a method for obtaining the composition of the filler, which includes a mixture of components, as defined herein, preferably in quantities and proportions, as defined in this description. The components can be mixed in any order and preferably after each addition to mixing. Preferably the cationic inorganic and organic compounds added to the filler, either individually or in the form of a previously prepared mixture (premix). When using the append mode separately, the cationic inorganic compound may be added to the filler prior to the introduction of cationic organic compounds, cationic organic compound may be added to the filler prior to the introduction of cationic inorganic compounds or cationic inorganic and organic compounds can be added simultaneously, but separately. Usually, the anionic polysaccharide is added to the filler after the introduction of the cationic inorganic and organic compounds. If water is present, then preferably the water is from the outset of the method of mixing, for example using a water suspension containing the filler. Other components can also be used in the form of water plants the Directors, dispersions or suspensions. The method may be performed periodically, properities or continuous method.

In a preferred embodiment, the mixing is performed in properities mode or continuous in-line filler paper machine. For this purpose the components of the composition of the filler is injected into the water stream and the resulting stream water composition of the filler of the present invention is added to aqueous suspension containing cellulosic fibers, which are served in the headbox from which the suspension is fed to the plate grid paper machine. Water flows from the suspension with the formation of the wet paper web, which is then dewatered and dried in the dryer section of the papermaking machine.

The filler composition of the present invention can be used as an additive in the production of ceramic materials, paints, paper, plastics, powder compositions, etc. Preferably the composition of the filler used in the manufacture of paper and as such it is used as additive to the aqueous suspension containing pulp fibers.

The present invention also relates to a method for producing paper, which includes the preparation of an aqueous suspension containing pulp fibers (cellulose suspense and"), adding to a pulp slurry of the present composition of the filling and dewatering the pulp suspension with the formation of a cloth or sheet of paper. Of course, the method can also be used other additives, being either introduced into the pulp suspension, or printed on canvas or sheet obtained paper. Examples of such additives include conventional fillers, optical brighteners, sizing tool, a means to increase strength in the dry state, a means to increase strength in the wet state, cationic coagulants, a means of facilitating drainage and retention of fine particles, etc.

Examples of suitable conventional fillers include fillers, above, mainly kaolin, porcelain clay, titanium dioxide, gypsum, talc, natural and synthetic calcium carbonates such as chalk, crushed marble, ground calcium carbonate and precipitated calcium carbonate, hydrogenated aluminum oxide (trihydroxide aluminum, calcium sulfate, barium sulfate, calcium oxalate, etc.

Examples of suitable means for increasing the strength in the wet state include cationic polyamine and polyaminoamide, including products obtained by reaction of polyamines and polyaminoamide with epichlorohydrin.

Examples of suitable sizing means in luchot directionspanel in relation to pulp size, for example, a size based on rosin, such as soap based on rosin, emulsion/dispersion based on rosin, reacting with cellulose sizing tools, such as emulsion/dispersion anhydrides of acids, such as alkyl - and alkenylamine (amber) anhydrides (ASA), alkenyl - and alkyl substituted dimers (AKD) and multimer of Ketanov, as well as anionic, cationic and amphoteric polymers from monomers with ethylene unsaturation, for example, copolymers of styrene and acrylates. One or more sizing tools can be added to the pulp suspension is applied on the paper surface during application of a sizing tool, or both ways. In a preferred embodiment, at least one sizing tool is added to the pulp suspension and at least one sizing tool is applied to the paper. Taped and filled paper of the present invention exhibits excellent strength and characteristics of the ring.

Examples of suitable ketonovyh dimers include dimers following General formula (I), where R1and R2represent a saturated or unsaturated hydrocarbon group, typically saturated hydrocarbon fragments, and hydrocarbon groups generally have from 8 to 36 carbon atoms, usually presenting samayalcorner group with a linear or branched chain, containing from 12 to 20 carbon atoms, such as hexadecyne and octadecyl group. Examples of suitable acid anhydrides include anhydrides following General formula (II), where R3and R4may be the same or different and represent saturated or unsaturated hydrocarbon group, mainly containing from 8 to 30 carbon atoms, or the radicals R3and R4together with the fragment-C-O-C - can form a 5-6-membered ring, optionally additionally substituted hydrocarbon groups containing up to 30 carbon atoms, such as isooctylphenyl anhydride.

Suitable sizing tools include compounds disclosed in U.S. patent 4522686, which is included in this description by reference.

Examples of suitable cationic coagulants include water-soluble organic polymer and inorganic coagulants coagulants. Cationic coagulants can be used individually or in combination, that is, a polymer coagulant may be applied in combination with inorganic coagulant. Examples of suitable water-soluble organic polymeric cationic coagulants include condensation polymers, such as cationic polyamine, cationic polyamidoamine, cationic polyethylenimine and to Tinnie dicyandiamide polymers, cationic polymers obtained by polyprionidae vinyl derivatives, such as cationic monomer with ethylene unsaturation, or a mixture of monomers containing at least one cationic monomer, such as cationic polymers based on acrylamide, cationic polymers based on acrylate, cationic polymers based on vinylamine/vinylformamide and cationic polymers based on diallyldimethylammoniumchloride. Examples of suitable cationic monomers with ethylene unsaturation include dialkylaminoalkyl(meth)acrylates and dialkylaminoalkyl(meth)acrylamide, preferably in quaternionic form, and diallyldimethylammoniumchloride (DADMAC). Cationic polymers of the monomer with ethylene unsaturation is usually derived from a cationic monomer in an amount of from about 10 to 100 mole percent of another monomer in an amount of from 0 to 90 molar percent, and the sum of the percentages is 100. The amount of cationic monomer is usually at least 80 molar percent, mainly 100 mole percent. Organic cationic polymer coagulants typically have a mass-average molecular weight of at least about 1000, mostly at least about 2,000 and preferably at least about 5000. Usually mass-average molecular weight is up to about 4000000, p is imushestvenno up to about 2000000 and preferably up to about 700000. Examples of suitable inorganic coagulants include aluminum compounds such as alum, aluminates such as sodium aluminate and potassium, and semi-aluminum compounds, such as polyaluminosilicate, sulfates of polyalanine, silicate-sulphate of polyamine and mixtures thereof.

Examples of suitable means contributing drainage and retention of fine particles include organic polymers, inorganic materials, such as anionic microdispersed materials, for example silicon-containing materials such as colloidal particles based on silica, montmorillonite/bentonite, and combinations thereof. The term "means of facilitating drainage and retention of fine particles", as used herein, relates to one or more additives which, when added to the aqueous pulp suspension provides better drainage and/or retention of fine particles than is achieved in the case when the mentioned one or more additives are not registered.

Examples of suitable organic polymers include anionic, amphoteric and cationic starches; anionic, amphoteric and cationic polymers based on acrylamide, including, mainly, linear, branched and crosslinked anionic and cationic polymers based on acrylamide; and cationic polymer diallyldimethylammonium orida; cationic polyethyleneimine; cationic polyamine; cationic polyamidoamine and polymers on the basis of vinylamide, melamine-formaldehyde and urea resin. Primarily, a means of facilitating drainage and retention of fine particles includes at least one cationic or amphoteric polymer, preferably a cationic polymer. Cationic starch and cationic polyacrylamide are especially preferred polymers, and they can be used individually, in combination with each other or with other polymers, for example, other cationic and/or anionic polymers. The mass-average molecular weight of the polymer is preferably more than about 1,000,000 and preferably more than about 2000000. The upper limit of the mass-average molecular weight of the polymer is not significant; it can be about 50000000, usually about 30000000 and mostly about 25000000. However, the mass-average molecular weight of the polymers of natural origin, may be higher.

Particles of oxide silicon, i.e. particles based on SiO2or silicic acid, usually come in the form of aqueous colloidal dispersions, the so-called sols. Examples of suitable particles on the basis of silicon oxide include colloidal silica and different is cnie types polysilicon acid, or homopolymerization or copolymerizing. Sols on the basis of silicon oxide can be modified and can contain other elements, such as aluminum, boron, nitrogen, zirconium, gallium, titanium and the like, which may be in the aqueous phase and/or particles on the basis of silicon oxide. Examples of suitable particles on the basis of silicon oxide of this type include colloidal silicon dioxide, modified alumina, and aluminosilicates. Can also be used mixtures of such suitable particles on the basis of silicon oxide. Examples of suitable anionic particles on the basis of silicon oxide include particles having an average particle size below about 100 nm, preferably less than about 20 nm and more preferably in the range of from about 1 to about 10 nm. As it is usual for the chemistry of silica, the particle size is related to the average size of the primary particles, which may be aggregated or non-aggregated. Specific surface area of particles on the basis of silicon oxide is preferably more than about 50 m2/g and preferably more than about 100 m2/, As a rule, the specific surface area can be up to about 1700 m2/g Specific surface area measured by titration using NaOH commonly known method, for example, as described G.W. Sears in Analytical Chemistry, volume 28 (1956): No. 12, pp. 1981-1983 and in U.S. patent 5176891. This area thus represents the average specific surface area of the particles. Additional examples of suitable particles on the basis of silicon oxide include particles that are present in ó having an S-value in the range from 5 to 50%. S-Value can be measured and calculated as described Iler and Dalton in the journal J. Phys. Chem, vol 60 (1956), pp. 955-957. S-Value means the degree of aggregation or formation of microgel and a lower S-value is indicative of a higher degree of aggregation.

Examples of suitable combinations of tools to facilitate drainage and retention of fine particles include cationic polymers and anionic microdispersed materials such as siliceous materials, such as cationic starch and anionic colloidal particles on the basis of silicon oxide; cationic polymer based on acrylamide and anionic colloidal particles on the basis of silicon oxide; cationic polymer based on acrylamide, anionic polymer based on acrylamide and anionic colloidal particles based on silica or bentonite; and cationic polymer based on acrylamide and bentonite.

The filler composition of the present invention may be added to the pulp suspension in amounts which can vary within a wide range according, among other things, on the type of pulp suspension, type of filler, the type of paper, place making, etc. the Composition of the filler is usually added in the amount of at least about 1 kg/ton, calculated as dry filler in the calculation of the dry pulp fiber, mostly at least about 10 kg/ton, or at least about 50 kg/ton, preferably at least 100 kg/ton. The composition of the filler is usually added in quantities of up to 3000 kg/ton or 1000 kg/ton, or 750 kg/ton, calculated as dry filler in the calculation of the dry pulp fiber, mainly up to about 500 kg/ton, or up to about 450 kg/ton, preferably 400 kg/ton. Paper of the present invention typically has a content of the filler is within the range of from 0.1 to about 75% by weight, predominantly from about 1 to about 50% by weight and preferably from about 10 to about 40% by weight.

When the method is used by other components, such components can be added to the cellulosic suspension or printed on paper in amounts which can vary within a wide range depending, among other things, on the type and number of components, type of pulp suspension, the content of the filler, the type of paper, place making, etc. Size usually UPE the Yat in the cellulose suspension and/or applied to the paper in amounts of at least about 0.01% by weight, mostly at least about 0.1% by weight, based on the weight of dry fibers, and the upper limit is usually about 2% by weight, mainly about 0.5% by weight. In General, tools that facilitate drainage and retention of fine particles, making the pulp suspension in quantities which provide better drainage and/or retention of fine particles than that obtained when such funds are not used. A means of facilitating drainage and retention of fine particles, a means to increase strength in a dry condition and means to increase the strength in the wet state, independently from each other, usually made in the amount of at least about 0,001% by weight, specifically at least about 0,005% by weight, based on the weight of dry fibers, and the upper limit is usually about 5% by weight and preferably about 1.5% by weight.

The composition of the filler according to the present invention is used for paper production. The term "paper"as used in this description, of course, includes not only paper and its production, but also other cellulose sheet or tape products, such as stiff cardboard and packing cardboard, and their production. The method can be used in the production of paper from different types of water su is Pensi cellulose fibres, and the suspension should preferably contain such fibers in the amount of at least about 25% by weight and preferably at least about 50% by weight, calculated on dry substance. The suspension can be based on fibres from chemical pulp, such as sulphate, sulphite cellulose and cellulose process “Organosolv” (using organic solvents), mechanical pulp, such as thermo-mechanical pulp, chemo-thermo-mechanical pulp, refiner wood pulp and cellulose in the form of ground wood pulp from wood of deciduous and coniferous species, and may also be based on fibres from recycled materials, not necessarily from refined colors cellulose, and mixtures thereof. the pH of the suspension, mass, may be within a range from about 3 to about 10. The pH value is preferably more than about 3.5 and preferably within the range from about 4 to about 9.

Paper of the present invention can be used in different variants use primarily paper is used as writing paper and printing paper.

The invention is further illustrated by the following examples, which, however, does not suggest its limitations. Parts and percentages (%) refer to the mass parts and percent by weight, respectively, unless the e agreed otherwise.

Example 1

In the examples used the following components, unless otherwise noted:

GCC: ground calcium carbonate (Hydrocarb 60, the firm Omya),

PAC: polyaluminium (Eka ATC 8210),

RA: cationic polyamine (Eka ATC 4150),

Polydadmac: cationic polyDADMAC (RB 2329, firm SNF),

CMC 1: CMC (Finnfix 300, the firm Noviant), the degree of substitution stoichiometric excess anionic groups 0,76,

CMC 2: carboxymethylcellulose (Gabrosa 947A, the company Akzo Nobel), the degree of substitution stoichiometric excess anionic groups of 0.3-0.4

A-starch: anionic starch (Pearlsize 158, the company Lyckeby),

-Starch: cationic starch (Perlbond 970, the company Lyckeby),

C-PAM 1: cationic polyacrylamide (Eka DS 22),

C-PAM 2: cationic polyacrylamide (Eka PL 1510),

Silica: water Sol anionic particles of oxide silicon (Eka NP 320).

Example 2

This example illustrates the method of obtaining the filler compositions of the present invention. An aqueous solution PAC (10% by weight PAC, calculated as Al2O3) dropwise with stirring was added to the aqueous suspension of GCC (45% by weight of GCC) and the resulting suspension was stirred for several minutes, then added an aqueous solution of CMC (1% by weight CMC), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. The obtained composition of the filler shown in table 1 (tests 7-12 and 16-21) and the table 2 (test 7, 13 and 19).

Example 3

This example illustrates another way of obtaining the compositions of the filler of the present invention. An aqueous solution of PA (0.5% by weight of PA) dropwise with stirring was added to the aqueous suspension of GCC (45% by weight of GCC), and the resulting suspension was stirred for several minutes, then added an aqueous solution of CMC (1% by weight CMC), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. The obtained composition of the filler shown in table 2 (test 2-6).

Example 4

This example illustrates another method of obtaining the filler compositions of the present invention. An aqueous solution PAC (10% by weight PAC, calculated as Al2O3) dropwise with stirring was added to the aqueous suspension of GCC (45% by weight of GCC), and the resulting suspension was stirred for several minutes, then was added dropwise an aqueous solution of PA (0.5% by weight of PA). The resulting suspension was stirred for several minutes, then added an aqueous solution of CMC (1% by weight CMC), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. The obtained composition of the filler shown in table 2 (test 8-12, 14-18, 20-24).

Example 5

This example illustrates methods of obtaining compositions of filler used for comparison. Some of the songs are filler was obtained using the method of example 2, except that it is not used PAC. The obtained composition of the filler shown in table 1 (tests 4-6 and 13-15) and table 2 (test 1). One composition of the filler was obtained using the method of example 2 without the addition of PAC and CMC. Such compositions of the filler shown in table 1 (tests 1-3).

Example 6

This example illustrates the use of filler compositions according to examples 2 and 5 in paper production, and evaluation of strength characteristics of the finished paper products. Paper sheets were obtained using the setup Dynamic Sheet Former (Formette Dynamique)supplied by the company Fibertech AB, Sweden, and the strength of the paper in the dry state was assessed using a dynamometer Tensile Strength Tester supplied by the company Lorentzen &Wettre, Sweden. The composition of the paper was based on a bleached softwood Kraft pulp (NBKP), bleached hardwood Kraft pulp (LBKP) and GCC as a filler. Consistency aqueous pulp slurry (solids content) was 0.5 mass%, and the conductivity was adjusted to 0.5 MS/cm by adding sulfonate sodium. The mass was stirred with a speed of 700 rpm, and chemical ingredients added to the mass in the mixing chamber setup Dynamic Sheet Former, followed what remesiana. The filler composition according to examples 2-5 was added to the mass in different quantities to achieve different levels of filler in the range from 23 to 35.6% by weight. The following chemical compounds were added in a uniform way in the following order prior to printing paper sheet: C-Starch (8 kg/ton, based on dry paper sheet) was added over 45 seconds to drainage, C-PAM 1 (1 kg/ton, based on dry paper sheet) was added 30 s prior to dewatering, C-PAM 2 (0.2 kg/ton, based on dry paper) contributed 15 sec before drainage, Silica (0.5 kg/ton, calculated as SiO2and calculated on a dry sheet of paper) was made for 5 seconds before draining. Paper sheets are then formed by injection mass from the mixing chamber through the nozzle moving along a traverse, in a rotating drum in a water film on the upper side of the wire mesh were draining mass with the formation of the sheet, extruded and dried leaf. Then the leaves was assessed using a dynamometer Tensile Strength Tester. The results are shown in table 1 and figure 1, in which PAC [kg/ton] indicates the number of PAC, calculated as Al2O3on ton GCC, and CMC 1 [kg/ton] and CMC 2 [kg/ton] mean number of specific carboxymethylcellulose (CMC) per tonne of crushed calcium carbonate (GCC).

Example 7

This example illustrates the use of filler compositions according to examples 2 to 5 in the manufacture of paper. The strength characteristics of the resulting paper products were evaluated according to the General method of example 6, except that the composition of the filler was added in such quantities to bring the content of the filler in the resulting paper products to approximately 35% by weight. The effectiveness of drainage was estimated using the device Dynamic Drainage Analyser (DDA), produced by the firm Akribi AB, Sweden, which measures the time spent on the drainage of a given amount of weight. The mass was stirred vessel with a paddle stirrer with a speed of 1500 rpm throughout the test, while the added filler composition, and chemical additives as described in example 6 (except that C-PAM 1 was not added). Mass with a volume of 800 ml was trenirovki through the wire when I removed the tube and created a vacuum on the side of the grid, which is the opposite side, which is the mass. The effectiveness of drainage is described as the time of dehydration in seconds [sec]. The efficiency of retention of fine fractions (retention on the first pass) was estimated using turbidity meter by measuring the turbidity of the filtrate from the device in a Dynamic Drainage Analyser (DDA), the white water obtained programirovanii mass, formed in testing the efficiency of drainage. Turbidity is expressed in values units [NTU]. The value of the cationic demand of the particles (PCD) was estimated using the device Mütec PCD on the filtrate from the apparatus DDA. Used 10 ml of the mixed filtrate. The value PCD expressed in microequivalents anionic charge per liter of fluid (mEq/l). The results are shown in table 2, in which the value of PA [kg/ton] indicates the number of cationic polyamine (PA) per tonne of crushed calcium carbonate (GCC).

Example 8

This example illustrates another way of obtaining the compositions of the filler of the present invention. An aqueous solution of the polymer diallyldimethylammoniumchloride (polydadmac) (0.5% by weight of the product polydadmac) dropwise with stirring was added to the aqueous suspension of GCC (45% by weight of GCC), the resulting suspension was stirred for several minutes, then added an aqueous solution of CMC (1% by weight CMC), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. The obtained composition of the filler shown in table 3.

Example 9

This example illustrates another method of obtaining the filler compositions of the present invention. An aqueous solution PAC (10% by weight PAC, calculated as Al2O3) dropwise at paramesh what the training was added to the aqueous suspension of GCC (45% by weight of GCC) and the resulting suspension was stirred for several minutes, then was added dropwise an aqueous solution of polydadmac (0.5% by weight of the product polydadmac). The resulting suspension was stirred for several minutes, then added an aqueous solution of CMC (1% by weight CMC), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. The obtained composition of the filler shown in table 3.

Example 10

This example illustrates the method of obtaining the filler compositions of the present invention. An aqueous solution PAC (10% by weight PAC, calculated as Al2O3) dropwise with stirring was added to the aqueous suspension of GCC (45% by weight of GCC), the resulting suspension was stirred for several minutes, then added an aqueous solution of A starch-starch (2% by weight of A-starch), and the resulting composition of the filler was diluted with water to a concentration of 20% by weight solids. Some of the songs are filler were obtained without the addition of PAC. The obtained composition of the filler shown in table 4.

Example 11

This example illustrates the use of filler compositions according to examples 2, 5 and 8 in paper production. Drainage, retention of particles and cationic demand of particles (PCD) was evaluated according to the General method of example 7. The composition of the filler was added in such quantities to bring the content of the filler to about 35%by weight. To measure the amount of carboxymethyl cellulose (CMC), associated with the filler, colorimetrically estimated residual content of the CMC in the liquid phase of the composition of the filler with antropofago method (calibrated by CMC). Samples were prepared by centrifugation of the liquid separated from the filler. The fluid is analyzed for the content of CMC expressed as concentration (g/l). theoretical concentration of CMC in the liquid phase in all trials in the table is 2.5 g/L. the Results are shown in table 3, in which PAC [kg/ton] indicates the number of PAC, calculated as Al2O3on ton GCC, and in which polydadmac [kg/ton] represents the number of polymer diallyldimethylammoniumchloride (polydadmac) per tonne of crushed calcium carbonate (GCC).

Example 12

This example illustrates the use of compositions of the filler according to example 10 in paper production. Drainage, retention of fine particles and cationic demand of particles (PCD) was evaluated according to the General method of example 7. The composition of the filler was added in such quantities to bring the content of the filler to about 35% by weight. The results are shown in table 4, in which PAC [kg/ton] indicates the number of PAC, calculated as Al2O3on ton GCC, and PS 158 [kg/ton] indicates the number of specific the CSOs starch (A starch) per tonne of crushed calcium carbonate (GCC).

Table 4
Tested well. No.Polyaluminium (PAC) [kg/ton]Anionic starch (PS 158) [kg/ton]Time dehydration [seconds]Turbidity [NTU, values turbidity units]Cationic demand of particles (PCD) (mEq/l)
1--5,112033
2-105,812066
3-205,818598
4-406,5190150
50,510,6 10039
60,5204,311563
70,540the 4.7140117
81103,59030
91204,09555
101404,390103
112103,610025
122203,610042
132404,112588

Example 13

The example illustrates the continuous way of obtaining the compositions of the filler. Aqueous suspension of GCC (75% by mass GCC) was continuously diluted with water to a content of 45% by weight. To water for dilution was continuously added to an aqueous solution of PA (20 mass% PA) and an aqueous solution PAC (10% by weight, calculated as Al2O3). The resulting composition was applied to the 1st static mixer, and added an aqueous solution of CMC (2% by weight CMC). The resulting composition was applied in the 2nd static mixer. The final composition contained 30% by weight solids.

Example 14

This example illustrates the use of compositions of the filler according to example 13 in the pilot experiments for the production of paper. Paper with a weight of approximately 80 GSM (g/m2) was obtained in the continuous mode on the pilot paper machine PMXp, in Markaryd, Sweden. The pulp was based on softwood Kraft pulp (NBKP) and bleached hardwood Kraft pulp (LBKP). Chemical ingredients and composition of the filler was added in various positions in the supply system wet end of the papermaking machine. The starch-starch (2% by weight C-starch) was added before the pump mash is authorized camera, PAC (10% by weight, calculated as Al2O3) was added into the tray with the filtrate, the composition of the filler was added before the pump headbox, C-PAM 2 (0,067% by weight) was added after the pump headbox, and a silicon oxide (0.5% by weight) was added directly in front of the entrance nozzle of the headbox. The mass in the pressure box was 0.4% by weight. The strength characteristics of the resulting paper was evaluated by measuring the tensile strength, Scott Bond (resistance to delamination), Z-strength (the strength of internal connections) and Wax pick (surface durability) (all supplied by firm Lorenzen & Wettre, Sweden). Estimated specific energy consumption for drying (kW).

Example 15

This example illustrates the use of filler compositions according to examples 2 and 5 in paper production. Drainage and retention of fine fractions, are presented below in table 6 were evaluated according to the General method of example 7. The following chemical compounds were added in a uniform way in the following sequence prior to testing, drainage and retaining the thin fractions: C-Starch (8 kg/ton, based on dry paper sheet) was added over 45 seconds to drainage, C-PAM 2 (0.1 kg/ton, based on dry paper) contributed 15 sec before drainage, Silica (0, kg/ton, calculated as SiO2and calculated on a dry paper sheet) was added 5 seconds to drain.

1. The composition of the filler containing
a) a filler,
b) a cationic inorganic compound, which is polyaminoacid,
c) cationic organic compound, and
d) anionic polysaccharide,
where the filler is present in amounts of at least about 1% by weight calculated on the total weight of the composition, the anionic polysaccharide is present in an amount of from about 1 to about 100 kg/ton based on the weight of the filler and the composition essentially contains no fiber.

2. The composition of the filler containing
a) a filler,
b) a cationic inorganic compound, which is polyaminoacid,
c) cationic organic compound, which is a cationic polyamines condensation polymer, and
d) anionic polysaccharide,
where the filler is present in amounts of at least about 1% by weight calculated on the total weight of the composition, each of the cationic inorganic and organic compounds are present in an amount of from about 0 to about 30 kg/ton based on the weight of the filler, the composition comprises at least one of the cationic inorganic and organic compounds and anionic polysaccharide himelstein replacement stoichiometric excess anionic groups up to about 0.65 is.

3. The method of obtaining the composition of the filler according to claim 1, comprising mixing
a) filler
b) cationic inorganic compounds, which is polyaminoacid,
c) cationic organic compounds and
d) anionic polysaccharide,
moreover, in the resulting composition of the filler, the filler is present in amounts of at least about 1% by weight calculated on the total weight of the composition, the anionic polysaccharide is present in an amount of from about 1 to about 100 kg/ton based on the weight of filler, and in which the mixing carry out essentially in the absence of fibers.

4. The method of obtaining the composition of the filler according to claim 2, comprising mixing
a) filler
b) cationic inorganic compounds, which is polyaminoacid,
c) cationic organic compounds, which is a cationic polyamines condensation polymer, and
d) anionic polysaccharide,
moreover, in the resulting composition of the filler, the filler is present in amounts of at least about 1% by weight calculated on the total weight of the composition, each of the cationic inorganic and organic compounds are present in an amount of from about 0 to about 30 kg/ton based on the weight of the filler, the composition comprises at least one of the cationic inorganic and organic is one compounds and anionic polysaccharide has a degree of substitution stoichiometric excess anionic groups up to about 0.65 is.

5. The composition according to claim 1 or 2, where the filler is selected from the group consisting of kaolin, China clay, titanium dioxide, gypsum, talc and calcium carbonate.

6. The composition according to claim 5, where the filler is a calcium carbonate.

7. The composition according to claim 1 or 2, where the filler is present in the composition in an amount of from about 5 to about 50% by weight based on the composition.

8. The composition according to claim 1 or 2, where the cationic inorganic compound is present in the composition in an amount of from about 0.1 to about 15 kg/t based on the weight of filler.

9. The composition according to claim 1 or 2, where the cationic organic compound has a mass-average molecular weight of from about 1000 to about 4000000.

10. The composition according to claim 1 or 2, where the cationic organic compound is the charge density in the range from about 0.2 to about 15 mEq/g

11. The composition according to claim 1 or 2, where the cationic organic compound is present in the composition in an amount of from about 0.1 to about 15 kg/t based on the weight of filler.

12. The composition according to claim 1 or 2, where the anionic polysaccharide is a derivative of cellulose.

13. The composition according to item 12, where the anionic polysaccharide is a carboxymethyl cellulose.

14. The composition according to claim 1 or 2, the de anionic polysaccharide essentially does not contain cationic groups.

15. The composition according to claim 1 or 2, where the anionic polysaccharide has a Quaternary ammonium group.

16. The composition according to claim 1 or 2, where the anionic polysaccharide has a degree of substitution stoichiometric excess of anionic groups in the range from about 0.15 to about 0,65.

17. The composition according to claim 1 or 2, where the anionic polysaccharide is present in the composition in an amount of from about 3 to about 30 kg/ton based on the weight of filler.

18. The composition according to claim 1 or 2, where the composition is an aqueous composition.

19. The composition according to claim 1 or 2, where the composition has a content of fibers is from about 0 to about 5% by weight based on the composition.

20. The composition according to claim 1 or 2, where the composition essentially contains no fibers and fibrils of cellulose or lignocellulose.

21. The composition according to claim 1 or 2, where the composition comprises fibers or fibrils of cellulose or lignocellulose in the amount of less than about 1% by weight based on the filler.

22. The composition according to claim 1 or 2, where the composition essentially contains no cationic starch.

23. The composition according to claim 1 or 2, where the mass ratio of the cationic inorganic compounds and cationic organic compounds to anionic polysaccharide is from about 1:1 to about 1:40.

24. The method according to PP or 4, in which the cationic cationic inorganic and organic compounds added to the filler in view of the premix.

25. The method according to PP or 4, in which the cationic polyaluminium and cationic organic compounds added to the filler separately.

26. The method according to PP or 4, in which the anionic polysaccharide is added to the filler after adding the cationic inorganic and organic compounds.

27. The method according to claim 3 or 4, in which the method is carried out on line filler paper machine.

28. The composition of the filler, which can be obtained by the method according to claim 3 or 4.

29. The use of a composition of the filler according to any one of claims 1, 2, 5-23 and 28, as an additive to the aqueous pulp suspension in the paper production process.

30. The method of producing paper comprising adding the composition of the filler according to any one of claims 1, 2, 5-23 and 28 to the aqueous pulp slurry and draining the obtained suspension.

31. The method according to item 30, further comprising adding silica material to the aqueous pulp suspension.

32. The method according to item 30 or 31, in which silica material includes particles based on silica or bentonite.

33. The method according to item 30, in which a sizing tool or added to the aqueous pulp suspension, or put on paper.

34. The paper obtained by the method according to any of PP-33.

35. Paper containing a filler composition according to any one of claims 1, 2, 5-23 and 28.



 

Same patents:

FIELD: textile, paper.

SUBSTANCE: method relates to paper or cardboard production and can be used on pulp-and-paper industry. Part of paper pulp fiber is treated with a polymer at least within two stages. Paper pulp treated with the polymer is mixed with remaining non-treated paper pulp. The mixed paper pulp is dehydrated on a net conveyor for forming fibrous web.

EFFECT: increase of strength without negative effect upon paper or cardboard volume with decreasing quantity of adding polymers and enhancing economical efficiency of the process.

14 cl, 4 dwg, 2 ex

FIELD: textile; paper.

SUBSTANCE: method (in version) concerns paper manufacturing and can be applied in pulp and paper industry. Method involves: (i) supply of water suspension containing pulp fiber, (ii) adding to suspension after the last point of severe shear force exposure of: (a) first anion component of anion organic polymer soluble in water; (b) second anion component of anion organic polymer dispersed in water or branched organic polymer; and (c) third anion component of anion material containing silicon; and (iii) dehydration of obtained suspension to produce paper. Also invention concerns composition (in version) including first, second and third anion components, and application of the composition as flocculation agent in production of pulp mass and paper for water treatment.

EFFECT: improved water drainage and retaining during paper manufacturing out of any type of pulp suspensions, accelerated operation of paper-making machine, reduced polymer dosage applied.

56 cl, 3 tbl, 4 ex

FIELD: paper industry.

SUBSTANCE: aqueous composition includes 0.01 to 45 % by weight of anionic organic polymeric particles and silica-based colloidal anionic particles at weight ratio between them from 20:1 to 1:50. Silica-based colloidal anionic particles are prepared by modifying silica with aluminum or amine. Anionic organic polymeric particles are prepared by polymerization of ethylenically-unsaturated monomers with multifunctional ramification agents and/or multifunctional cross-linking agents. Composition is prepared by combining the two types of particles. Papermaking method comprises adding above-prepared composition to pulp composed of cationic polymer fibers.

EFFECT: imp drying and retention properties of aqueous composition.

16 cl, 4 tbl, 4 ex

FIELD: pulp-and-paper industry, in particular, sizing of paper with the use of aqueous composition.

SUBSTANCE: method involves producing aqueous composition of cellulose filaments and dehydrating paper web; adding aqueous composition to cellulose suspension, said aqueous composition comprising sizing substance aggregates; producing aqueous composition by mixing in any order before adding into aqueous suspension of aqueous solution containing at least one coagulant and aqueous dispersion containing sizing substance. Zeta-potential of composition is below 20 mV.

EFFECT: increased efficiency and simplified method.

26 cl, 5 tbl, 3 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 an aromatic group

FIELD: textiles, paper.

SUBSTANCE: invention relates to the production of hydrophilic fibrous composite materials for medical purposes, having bactericidal, hemostatic and anesthetic effect. Biologically active fiber sheeting is made in the form of fibrous base that contains cellulose, viscose fiber and a binder; the base is coated with a material containing additives in the immobilised form. The material has a weight of 75-90 g/m2, the weight of the coating is 35-50% relative to the weight of the fibrous weight. As a binder in the base a polyamine-poliamidepichlorohydrin resin is used. The coating is made on the basis of a cationic polysaccharide of natural origin. At that the additive is a blood-coagulation factor IV, antifibrinolytics, anesthetic, antimicrobial and plastifying agents.

EFFECT: reduction of quantity of fibrous materials in manufacture of the basics, and also it has new favourable features, namely, antimicrobial, hemostatic and analgesic effects.

3 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: titanium dioxide based pigment, containing titanium dioxide particles, has a coating layer containing aluminium phosphate and aluminium oxide, and said layer additionally contains hollow particles. To obtain said pigment, aqueous suspension of titanium dioxide is prepared first, and aluminium- and phosphorus-containing components are then added, after which hollow particles are added and pH of the suspension is brought to 4-9. Also, aqueous suspension of titanium dioxide can be obtained at pH not lower than 10, and aluminium- and phosphorus-containing components can then be added while maintaining pH of at least 10, after which hollow particles are added. Further, pH of the suspension is brought to 4-9 and an aluminium oxide coating is then applied at pH from 4 to 9.

EFFECT: invention increases opaqueness and retention of pigment when making decorative paper.

22 cl, 1 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: method of obtaining at least one inorganic substance and/or at least one pigment containing natural and/or precipitated calcium carbonate, preferably natural, simultaneously partially organophilic and partially hydrophilic, comprises the following steps: a) obtaining at least one inorganic substance and/or at least one pigment containing natural and/or precipitated calcium carbonate, preferably natural, in dry form or in form of aqueous dispersion and/or suspension, b) if needed, dry grinding and/or grinding in aqueous medium of the inorganic substance and/or pigment obtained at step a), c) treating the inorganic substance and/or pigment obtained at step a) and/or step b), d) if needed, drying the inorganic substance and/or pigment obtained at step a) and/or b) and/or c). Step c) corresponds to a step for mixing in aqueous medium and/or grinding in aqueous medium and/or concentration in aqueous medium of the inorganic substance and/or pigment obtained at step a) and/or step b) in the presence of at least one ethylene acrylic acid salt. A dispersant and/or grinding agent is added before and/or during the treatment step c).

EFFECT: invention enables to increase content of dry substance in calcium carbonate suspensions while maintaining satisfactory viscosity without formation of agglomerates.

67 cl, 1 tbl, 1 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: 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: medicine.

SUBSTANCE: described is material for application in wound care. Material is made in form of fibrous base with applied on it functional coating, which contains polyvinyl alcohol with degree of water absorption up to 2100%, carnon-modified aluminium oxide with specific surface area up to 300cm2/g, as well as sodium-carboxymethylcellulose as binding agent. From the side of coating material is provided with atraumatic material which ensures non-adherence of material to wound.

EFFECT: improvement of therapeutic and preventive care.

2 cl, 1 tbl

Paper filler // 2345189

FIELD: textile, paper.

SUBSTANCE: filler is designed for paper making and can be used in pulp-and-paper industry. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative can contain cationic groups. Besides the invention refers to production process of filler involving mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, essentially without cellulose fibre or fibrils or lignocellulose. Other production process of filler consists in mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups. The invention refers to method for making paper including preparation of aqueous suspension containing cellulose fibre, suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose; dehydration of suspension thus making web or paper sheet. The invention also refers to method for making paper including preparation of aqueous suspension containing cellulose fibre; suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups; dehydration of suspension thus making web or paper sheet.

EFFECT: higher sizing efficiency with good drainage, retention and serviceability of papermaking machine.

24 cl, 3 tbl, 4 ex

FIELD: textiles; paper.

SUBSTANCE: method relates to obtaining white pigment for making paper and cardboard and is designed for use in paper and cardboard production. The method involves reaction of the suspension calcium hydroxide with a solution of aluminium sulphate in the presence of a modifying agent. The modifying agent used is a salt of carboxymethylcellulose in quantity of 1.0-2.0 mass of white pigment. The modifying agent is put into the dispersion of calcium hydroxide before its reaction with aluminium sulphate solution.

EFFECT: lower viscosity of the pigment dispersion and improved flow characteristics.

FIELD: papermaking industry.

SUBSTANCE: paper is produced from matrix obtained from composition containing pulp fibers, filler particles and retention system for said filler based on composition comprising complex of granules of ionic non-destructed swelled starch and ionic latex in aqueous carrier. Said composition contains from 60% to 95% by weight of said granules and form 40% to 5% by weight of latex of total 100 wt% on the basis of total content of solid substances of granules and latex. Granules are latex particles carriers in said complex. Processing of carrier involves producing composition of swelled starch-latex prepared in the presence of combined-action admixture or in the absence thereof, and adding said composition to filler suspension for producing of paper having improved retention of filler and allows paper to be produced, which contains filler wherein filler admixture produces minimal negative effect upon strength characteristics. Starch-latex composition may be used with compositions free of wood or with wood-containing compositions. Processed filler is readily retained in paper web in the process of paper making, improves dehydration and creates well-formed sheets. Sheets manufactured with the use of processed filler have higher adhesion strength and tensile strength as compared to sheets containing filler processed with the use of only swelled starch or only latex.

EFFECT: improved quality of paper produced with the use of starch-latex composition.

41 cl, 4 dwg, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: suspension containing calcium carbonate is obtained by adding one or more zirconium compounds and possibly one or more other additives which do not contain phosphate, acting as a dispersant and/or an additive which assists in grinding. Calcium carbonate in dry form and/or in form of an aqueous dispersion or filtered residue is added an aqueous suspension and/or aqueous emulsion and/or aqueous solution containing one or more zirconium compounds. The zirconium compounds used is ammonium zirconium carbonate or calcium zirconium carbonate or mixture thereof.

EFFECT: invention enables to avoid the use of phosphate dispersants when preparing stable aqueous suspensions of calcium carbonate and increases content of solid substance in the suspension.

17 cl, 22 ex

Up!