Aqueous solutions of optical brighteners
SUBSTANCE: described is an aqueous solution of an optical brightener, containing (a) 10-50 wt % optical brightener of formula (I): where: M is hydrogen, an alkali metal atom, ammonia or an amine cation; R1 is hydrogen, C1-C4-alkyl or C2-C4-hydroxyalkyl; R2 - C1-C4-alkyl which can be substituted with -CN- or -CONH2-group or C2-C4-hydroxyalkyl; or R1 and R2 together with a nitrogen atom close a morpholine ring; (b) 0.5-9 wt % polyvinyl alcohol, having degree of hydrolysis 71-85.2% and Brookfield viscosity 3-5.4 mPa·s; and (c) water. The invention also describes use of said solution in a coating composition for paper and a method of obtaining paper coated with said coating composition.
EFFECT: disclosed aqueous solutions of optical brighteners have low viscosity, can be used directly by paper manufacturers and can be fed by a pump directly into the coating composition to provide a coating on paper with high whiteness.
10 cl, 2 tbl, 5 ex
This invention relates to aqueous solutions of optical brighteners with polyvinyl alcohols which can be used directly by the paper manufacturers, and which provide a coated paper with high whiteness.
It is well known that white and therefore attractiveness of the covered securities can be enhanced by the introduction of optical brighteners in the composition of the coating. To satisfy the demand in covered securities high whiteness, requires more effective optical Brightener.
Although it is known that polyvinyl alcohol (PVOH) can improve the characteristic of the optical brighteners in pigmented coating compositions in acting as a carrier (see, for example, page 164 of “Surface Application of Paper Chemicals by Brander (Springer, 1977)), manufacturer of paper if you wish to use the polyvinyl alcohol enters separately in the coating composition is usually in the form of an aqueous solution obtained by high water content in the composition of the coating and, consequently, a prolonged drying time. Remains the problem of providing a manufacturer of paper completely satisfying means of the use of PVOH as a carrier for optical brighteners.
WO 2005/056658 provides a solution to the consideration of the method of obtaining water concentrate optionscollection/PVOH, containing successive stages: (a) providing water compositions clarifier comprising water and an active ingredient of an optical Brightener, in which the active ingredient of the optical brighteners are usually present in the aqueous compositions of the clarifier in the amount of from about 10% to about 25%; (b) mixing the polyvinyl alcohol resin with a specified composition of the optical Brightener in an amount of about 1 h the resin of polyvinyl alcohol 0.25-10 wt. including water composition clarifier with providing emerging aqueous concentrate of the polyvinyl alcohol resin and optical Brightener; and (C) boiling water concentrate with the dissolution of solid substances (i.e., obtaining an aqueous solution containing optical brighteners and 9.1-80% polyvinyl alcohol). The method allows to obtain a pigmented coating composition with low water content without compromising the degree of whiteness and color.
WO 2005/056658, however, does not provide a satisfactory solution for a manufacturer of paper, which usually wishes to dispense the solution of the optical Brightener/PVOH directly into the coating composition; aqueous solutions containing optical brighteners and more than 9% PVOH, are usually of such high viscosity that they can be supplied by the pump only with difficulty, if not to go. Manufacturers of paper is usually not FPIC is BNY to use a fluid with a viscosity of more than 1000 MPa·s not only because of the difficulty of the feed pump, but also because of the "shock" of thickening, when the liquid is of such high viscosity is introduced into the coating composition.
There remains a need to address the problem of providing an aqueous solution of the optical Brightener/PVOH, which combines good ability of clarification with low viscosity.
It was found that it is possible to obtain the solution of the optical Brightener/PVOH low viscosity, which can be used directly by the paper manufacturer, so that they can be dosed by a pump directly into the coating composition, and which provide a coated paper amazingly high brightness.
The present invention therefore provides aqueous solutions of optical brighteners consisting essentially of:
(a) from 10 to 50 wt.%, at least one optical Brightener of formula (1):
M represents hydrogen, alkali metal atom, ammonium or a cation derived from an amine, preferably hydrogen or sodium, most preferably, sodium,
R1represents hydrogen, C1-C4-alkyl or C2-C4-hydroxyalkyl, and
R2represents a C1-C4-alkyl which may be substituted by-CN or-CONH2group, or With2-C4-hydroxyalkyl,
or R1and R2together with the atom is the monk closes morpholino-ring;
(b) from 0.5 to 9 wt.% polyvinyl alcohol having a degree of hydrolysis of from 60 to 85%; and
NR1R2represents, preferably, N(CH2CH2OH)2N(CH2CH(CH3)OH)2N(CH2CH2OH)CH2CH2CONH2or N(CH2CH(CH3)OH)CH2CH2CONH2and, most preferably, N(CH2CH2OH)2or N(CH2CH(CH3)OH)2.
Aqueous solutions can contain up to 10 wt.% salt, usually sodium chloride formed as a byproduct in the preparation of optical brighteners.
Aqueous solutions may contain one or more antifreeze, pesticides, complexing agents, or other additives, and organic by-products formed during the preparation of optical brighteners. Aqueous solutions can contain other media, such as polyethylene glycol.
Polyvinyl alcohol preferably has a degree of hydrolysis of from 65 to 80% and a viscosity according to Brookfield 2-40 MPa·s (4% aqueous solution at 20°C). More preferably, the polyvinyl alcohol has a degree of hydrolysis of from 65 to 80% and a viscosity according to Brookfield 2-20 MPa·s (4% aqueous solution at 20°C).
Preferably, the content of polyvinyl alcohol in the solution lies in the range of 1-5%, more preferably in the range of 1.5 to 4 wt.% by weight of solution.
Konzentrat the I optical Brightener solution is, preferably, in the range of 15-40 wt.%, more preferably, in the range of 18-35 wt.% by weight of solution.
The solution of the optical Brightener/PVOH is usually obtained from the introduction of polyvinyl alcohol as solids in the mixed solution of the optical Brightener in water and heated at 90-95°C until a clear solution is formed.
The aqueous solution has a pH of, preferably, from neutral to distinctly alkaline, in particular in the range from pH 7 to pH 10. If necessary, the pH can be adjusted by the introduction of M-relevant bases, such as hydroxides or carbonates of alkali metal, ammonia or amines.
The solution of the optical Brightener/PVOH invention are stable during storage and can be used directly as such in the sense that they can be dosed by a pump directly into the coating composition. Thus, another objective of the present invention is the introduction of the solution of the optical Brightener/PVOH in the composition of the coating to obtain a coated and optically brightened paper.
Thus, the present invention also provides a method of obtaining a coated paper, i.e. optically brightened, at least in the coating in which the coating composition, as described above, is applied to the paper after formation of the sheet.
Composition of coating pre what are essentially aqueous composition, which contain at least one binder and a white pigment, in particular, opaque white pigment, and can optionally contain other additives, such as dispersants, antifoams and synthetic thickeners.
Despite the fact that it is possible to obtain a coating composition that does not contain white pigments, the best white substrate for printing is obtained using opaque coating compositions that contain 10-70 wt.% white pigment. These white pigments are typically inorganic pigments, such as aluminosilicate (kaolin, otherwise known as China clay), calcium carbonate (chalk), titanium dioxide, aluminum hydroxide, barium carbonate, barium sulfate or calcium sulfate (gypsum).
The binder can be any of the binders commonly used in the paper industry to obtain coating compositions and binder may consist of a single binder or a mixture of primary and secondary binders. The only, or primary, the binder is preferably a synthetic latex, usually, styrene-butadiene, vinyl acetate, styrene-acrylic, venerability or ethylenevinylacetate polymer. The secondary binder may be, for example, starch, carboxymethylcellulose, casein, soy polymers, polyvinyl alcohol or a mixture of any of them.
Unity is Noah, or primary binder is used in an amount typically in the range of 5-25 wt.% by weight of white pigment. The secondary binder is used in an amount typically in the range of 0.1 to 10 wt.% by weight of white pigment.
Optical Brightener of formula (1) is used in an amount typically in the range of 0.01-1 wt.% by weight of white pigment, preferably in the range of 0.05-0.5 wt.% by weight of white pigment.
The following examples explain the invention in more detail. Unless otherwise specified, "%" and "parts" are by weight, the viscosity measured using Brookfield viscometer.
Sample preparation 1
The solution of the optical Brightener 1 is produced by mixing together the 25.9 wt. including optical Brightener of the formula (2),
72.0 wt. including water and
2.1 wt. including polyvinyl alcohol having a degree of hydrolysis of 71% and a viscosity according to Brookfield 5,4 MPa·s (4% aqueous solution at 20°C).
Viscosity by Brookfield 5,4 MPa·s (4% aqueous solution at 20°C) receive when heated to 90-95°C to obtain a clear solution which remains stable after cooling to room temperature. the pH of the solution adjusted to 9.0 with sodium hydroxide.
The viscosity of the solution is 97 MPa·s at 20°C and 211 MPa·s at 10°C.
Example preparation of 2
Comparative example (without polyvinyl with the IRTA)
The solution of the optical Brightener 2 is produced by mixing together the 25.9 wt. including optical Brightener of the formula (2) and 74,1 wt. including water. the pH of the solution adjusted to 9.0 with sodium hydroxide.
Receive a coating composition containing 500 wt. including chalk (commercially available under the trade name Hydrocarb 90 from OMYA), 500 wt. including clay (commercially available under the trademark of SPS Kaolin from IMERYS), 470 wt. including water, 6 wt. including dispersant (sodium salt of polyacrylic acid, commercially available under the trademark Polysalz S from BASF), 200 wt. including 50% of latex (copolymer of styrene-butadiene, commercially available under the trademark DL 921 from Dow) and 50 wt. including a 10% solution of carboxymethyl cellulose (commercially available under the trademark Finnfix 5,0 from Noviant) in water. The solids content is adjusted to 60% by addition of water and the pH adjusted to 8-9 with sodium hydroxide.
Solutions of optical brighteners 1 and 2, obtained as described in preparation examples 1 and 2, respectively, is injected in the concentration range from 0.4 to 1.0 wt.% solids in the mixed composition of the coating. Clarified the composition of the coating then is applied to the sheet of commercial 75 g/cm white paper base with a neutral sizing using automatic wire applicator with standard speed and standard load provolo the hydrated applicator. Coated paper is then dried for 5 min in a stream of hot air. Provide air-dried paper, and then determine the ice (CIE)-white on the calibrated Elrefo-spectrophotometer.
|The concentration of the active optical Brightener solution by weight of dry matter (%)||The concentration of the active optical brighteners (2) by weight of dry matter (%)||The ice-white using a solution of 1||The ice-white using a solution of 2 (comparative)|
These results clearly show the surprising superiority of whiteness of coated papers obtained using data solutions that contain only 2.1 wt.% polyvinyl alcohol.
Examples preparation 3-5
Solutions of optical brighteners 3-5, containing 12.3% of active clarifier, is produced by mixing together
12.3 wt. including optical Brightener of the formula (2),
(87,7-x) wt. including water and
x wt. including polyvinyl alcohol having a degree of hydrolysis of 85.2% and a viscosity according to Brookfield at 3.7 MPa·s (4% aqueous solution at 20 °C)
when heated to 90-95°C to obtain a clear solution which remains stable after cooling to room temperature. the pH of the solution adjusted to 9.0 with sodium hydroxide.
The viscosity of each solution are presented in table 2.
|Number example||The concentration by weight PVOH solution (%)||Viscosity|
|4||6,3||123,5||figure of € 256.4|
|5 (Example from WO 2005/056658)||9,5||4269||5089|
These results clearly show the pre is the data gives solutions in terms of low viscosity and, thus, the ability to go pump.
1. Aqueous solutions of optical brighteners consisting essentially of (a) from 10 to 50 wt.%, at least one optical Brightener of the formula (I):
M represents hydrogen, alkali metal atom, ammonium or a cation derived from an amine,
R1represents hydrogen, C1-C4-alkyl or C2-C4-hydroxyalkyl, and
R2represents a C1-C4-alkyl which may be substituted by-CN or-CONH2group, or With2-C4-hydroxyalkyl,
or R1and R together with the nitrogen atom complete morpholino-ring;
(b) from 0.5 to 9 wt.% polyvinyl alcohol having a degree of hydrolysis of from 71 up to 85.2% and a viscosity according to Brookfield from 3 to 5.4 MPa·s; and
2. The solutions according to claim 1, in which
M represents sodium,
NR1R2represents N(CH2CH2OH)2N(CH2CH(CH3)OH)2N(CH2CH2OH)CH2CH2CONH2or N(CH2CH(CH3)OH)CH2CH2CONH2and
in which polyvinyl alcohol has a degree of hydrolysis of from 71 to 80% and a viscosity according to Brookfield 3-5,4 MPa·S.
3. The solutions according to claim 1, in which
M represents sodium,
NR1R2represents N(CH2CH2OH)2N(CH2CH(CH3/sub> )OH)2and
in which polyvinyl alcohol has a degree of hydrolysis of from 71 to 75% and a viscosity according to Brookfield 3-5,4 MPa·S.
4. The solutions according to claim 1, in which the concentration of polyvinyl alcohol is from 1 to 5 wt.% and in which the concentration of the optical Brightener is from 15 to 40 wt.%.
5. The solution according to claim 4, in which the concentration of polyvinyl alcohol is from 1.5 to 4 wt.% and in which the concentration of the optical Brightener is from 18 to 35 wt.%.
6. The application of the solution according to any one of claims 1 to 5 for coating compositions for paper.
7. A method of obtaining a coated paper in which a coating composition containing solution according to any one of claims 1 to 5, is applied to the paper after formation of the sheet.
8. The method according to claim 7, in which the coating composition contains from 10 to 70 wt.% one or more white pigments.
9. The method according to claim 7, in which the coating composition contains a primary binder based synthetic latex selected from styrene-butadiene, vinyl acetate, styrene-acrylic, vinylgroover or ethylene-vinyl acetate polymer, or optionally the secondary binder is selected from starch, carboxymethyl cellulose, casein, soy polymers or polyvinyl alcohol or a mixture of any of them.
10. The method according to claim 7, in which the primary binder is used in an amount of 5 to 25 wt.% from the mass of white pigment is a, in which the secondary binder is used in an amount of from 0.1 to 10 wt.% by weight of white pigment and in which the optical Brightener of formula (1) is used in an amount of from 0.01 to 1 wt.% by weight of white pigment, preferably from 0.05 to 0.5 wt.% by weight of white pigment.
SUBSTANCE: water-soluble composition contains a) at least one water-soluble optical bleaching agent, b) a polymer obtained from an ethylenically unsaturated monomer or a monomer mixture, characterised by that at least one monomer is an acrylamide and the water-soluble polymer has average (weight-average) molecular weight between 500 and 49000, optionally c) polyethylene glycol with weight-average molecular weight between 500 and 6000, and d) water. Said composition is used to optically bleach paper.
EFFECT: high degree of bleaching while preserving rheological properties.
7 cl, 7 tbl, 70 ex
FIELD: textile, paper.
SUBSTANCE: full bleaching/extraction of craft cellulose fibres is carried out with a chorine agent. Afterwards fibres are washed and exposed to contact in solution with at least one optical bleach (OB) upstream the mixing box and the discharge box of the machine. Fibres in solution have consistency from 7 to 15%, pH of solution in process of contact of fibres with OB makes from 3.5 to 5.5, temperature of contact makes from 60 to 80°C, and time of contact is from 0.5 to 6 hours. Additional contact of OB with fibres is carried out in the device for coating application or in the gluing press. Contact may be carried out at the stage of storage, both at high density and low density of the craft-cellulose fibres, and also at the stage of refinement.
EFFECT: improved whiteness and brightness of fibres when using lower quantity of OB.
19 cl, 11 dwg, 12 tbl, 6 ex
FIELD: textile, paper.
SUBSTANCE: method concerns reducing speed of photoyellowing of paper containing mechanical pulp. The method includes coating the surface of a paper sheet during papermaking of aqueous solution containing an effective amount of one or more salts of thiocyanic acid.
EFFECT: improvement of stability to photoyellowing of paper and cost-effective way while reducing its toxicity.
16 cl, 10 tbl
FIELD: textile, paper.
SUBSTANCE: method includes formation of composition, containing water, raw starch and powder optical refining agent. Boiling of composition. Application of finished composition, at least on one surface of paper or cardboard base in coating press. Then base is dried. In another version of method composition is boiled at the temperature up to 299°F inclusive.
EFFECT: improved brightness of paper and cardboard.
7 cl, 4 dwg, 8 tbl, 1 ex
SUBSTANCE: invention describes an aqueous dispersion of an optical bleaching agent which is stable during storage, does not contain dispersants and stabilisers and contains 20-40% active substance in form of one or more optical bleaching agents obtained through successive reaction of cyanuric chloride with 4,4'-diamino-2,2'- stilbene sulphonic acid, amine and a product of reacting monoethanol amine with acrylamide.
EFFECT: disclosed dispersion of optical bleaching agent does not require dispersants or other stabilising additives to prevent settling during storage and has excellent properties for bleaching paper and other cellulose materials.
8 cl, 2 tbl, 4 ex
FIELD: paper industry.
SUBSTANCE: methods refer to manufacturing of bleached cellulose material, prevention of yellowing and loss of whiteness in bleached craft-cellulose, and manufacturing of paper goods. In process of bleached cellulose material manufacturing, bleached craft-cellulose is produced and exposed to contact with sufficient amount of more or several reducing agents. Additionally bleached craft-cellulose is exposed to contact with one or several optical bleach, with one or more chelating agent. Method for prevention of yellowing and loss of whiteness of bleached craft-cellulose in storage includes addition of efficient amount of one or more reducing agent into bleached cellulose and possibly one or more chelating agent, one or more polycarboxylate or their combinations. Method for production of paper goods includes production of bleached craft-cellulose, formation of initial water suspension from it, water drainage with formation of sheet and sheet drying. Besides efficient amount of one or more reducing agent is added into bleached craft-cellulose, initial suspension or sheet. Additionally one or more chelating agent is added there, one or more optical bleach, one or more polycarboxylate, or their combination.
EFFECT: improved quality of paper goods, increased stabilisation of whiteness and increased resistance to yellowing in process of paper production and to thermal yellowing, improved colour pattern.
17 cl, 33 tbl
FIELD: textile, paper.
SUBSTANCE: procedure refers to production of wood pulp and can be implemented in pulp-and-paper industry. The procedure consists in whitening fibres of sulphate pulp with a whitening agent on base of chlorine and in washing whitened fibres of sulphate pulp. Upon washing fibres of sulphate pulp are subject to interaction with at least one optic whitener before mixing ponds. Interacting is carried out in solution at pH from 3.5 to 8.0 and temperature from 60 to 80°C during 0.5-6 hours. The invention also refers to wood pulp produced by the said procedure.
EFFECT: increased whiteness and optic brightness of paper at decreased utilisation of optic whitener.
22 cl, 11 dwg, 11 tbl, 7 ex
SUBSTANCE: invention relates to concentrated aqueous solutions of hexa-sulfonated stilbene used optical brighteners. Description is given of an aqueous solution of hexa-sulfonated stilbene optical brightener which is stable during storage with over 0.214 mol/kg content thereof in the solution. The solution does not contain a soluble agent, for example urea. By removing salts formed during synthesis of the optical brightener, its concentration of up to 0.35 mol/kg can be achieved without losing stability during storage. Also described is a method of preparing an aqueous solution of the said optical brightener and its use for bleaching paper or cellulose materials.
EFFECT: high concentration solutions of the said optical brightener do not show crystallisation signs after 2 weeks at 5°C and enables formation of coating compositions with low water content, which reduces energy consumption on drying and reduces penetration of water and adhesive into the paper layer.
10 cl, 1 dwg, 1 tbl, 3 ex
FIELD: textile fabrics, paper.
SUBSTANCE: aqueous solutions are related to toluylene optical bleaches and may be used in production of chalk overlay paper of high whiteness. Aqueous solutions contain at least one optical bleach, polyvinyl alcohol, having extent of hydrolysis over 75% and Brookfield viscosity of 2-40 mPa·s, and water. This composition may be used for paper coating. It may be applied on paper after its moulding to produce chalk overlay paper.
EFFECT: provision of stability in storage of aqueous solutions of toluylene optical bleaches and simplified method for production of chalk overlay paper.
9 cl, 3 tbl, 3 ex
SUBSTANCE: described is a composition, containing (A) 2 to 30 wt % composition of amino alcohol - 2-amino-2-methyl-1-propanol with formula (1), and (B) 70 to 98 wt % composition of fluorescent optical bleaching agent with formula (2) , where X - is hydrogen, ion of alkali metal or ammonium, or hydroxyalkylammonium radical, derived from amino alcohol (1); R7, R8, R9 and R10 - -OR11, -NR11R12 or , where R11 and R12 - is hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl, carboxyalkyl, dicarboxyalkyl, H2N-CO-alkyl or alkylthio group.
EFFECT: high solubility in water and increased stability when storing its aqueous solutions.
4 cl, 3 tbl, 3 ex
FIELD: process engineering.
SUBSTANCE: invention relates to filters intended for separation of inhomogeneous systems, in particular, to fabrication of filtration PVFM-based materials to be used in cleaning fluids and gases of water, mechanical impurities and biological contaminants. Composition for filter fabrication includes the following components, in wt %: polyvinyl alcohol - 5-20, porophore - 2-10, paraformaldehyde cross-linking agent - 2-15, catalyst - 1-15, water making the rest. Porophore mat represent a mix of starches with average grain size, or mix of starch with dextrin. Preset amount of polyvinyl alcohol is diluted in water. It is heated to 75-95°C with continuous mixing. Porophore suspension in cold water is added to obtained solution and kept at 55-80°C for 15-30 min with continuous mixing. Preset amount of cross-linking agent is added thereto and mixed for 10-30 min. Preset amount of catalyst is added thereto at 30-40°C and mixed for 10-20 min. Obtained reaction mix is poured in the mould, kept in temperature controlled cabint at 55-80°C for 5-20 h. Produced element is withdrawn from said mould, washed of catalyst and porophore. Drying is carried out at 15-25°C and, then, at 30-50°C to constant weight.
EFFECT: simplified process, possibility to vary filter porosity, reduced contamination.
4 cl, 4 tbl, 16 ex
FIELD: engines and pumps.
SUBSTANCE: flavoring substance dispensing pump has pumping mechanism and pump head fitted on one end of pumping mechanism. Pump head comprises top and bottom sections. Flavoring substance is located inside inner chamber in top section. Bottom section incorporates appliance to attach dispensing pump to container. Pump head top section has dispensing channel running, on its one end, through inner chamber to extend into pump head bottom section and, further, into pumping mechanism while, on its other end, it extends into ambient medium. Peripheral wall of top section and peripheral wall of bottom section have clearance. In actuating dispensing pump, flavoring substance flows out from said clearance. Said flavoring substance may be solid, solid particles or compressible substance.
EFFECT: pump to dispense first product from container and flavoring agent as second product.
25 cl, 9 dwg
SUBSTANCE: non-formaldehyde-containing curable aqueous composition contains polyvinyl alcohol combined with starch or modified starch or sugar, a multi-functional cross-linking agent and, optionally, a catalyst. The cross-linking agent is non-polymeric polyaldehyde, non-polymeric polyacid, salt thereof or anhydride. Nonwoven articles are obtained by bringing the composition into contact with fibrous components. Further, the mixture is cured to obtain a hard thermoset polymer.
EFFECT: composition ensures excellent strength and water resistance of the cured nonwoven article.
22 cl, 4 tbl, 15 ex
SUBSTANCE: invention relates to the technology of producing gas-permeable membranes which can be used in fuel cells at high operating temperature (100°C and higher, methanol fuel cells, low- and high-pressure water electrolysis cells etc). The membrane is made from a copolymer of tetrafluoroethylene with perfluorosulpho-containing vinyl ether and a tertiary modifying perfluorinated comonomer - perfluoro-2-methylene-4-methyl-1,3-dioxalane or perfluoroalkylvinyl ether containing 1 or 3 carbon atoms in the alkyl, and a polymeric or inorganic modifier. The method of making the membrane involves contacting a perfluorosulpho-cationite membrane with a liquid composition containing an ion-exchange perfluorosulpho-polymer, a polymeric or inorganic modifier and a solvent. The perfluorosulpho-polymer with functional sulpho-groups SO3M, where M is a hydrogen, ammonium or alkali metal ion, has equivalent mass of 800-900, and is similar on structure to the membrane polymer. Contacting is carried out at 18-80°C. Particles of the modifier are formed on the surface or inside the membrane at 18-120°C.
EFFECT: preserving proton conductivity, preventing cathode polarisation and water flooding, high energy density of fuel cells.
12 cl, 3 tbl, 41 ex
SUBSTANCE: present invention relates to a re-emulsifiable powdered resin. Described is a re-emulsifiable powdered resin obtained from an aqueous emulsion of synthetic resin which contains a hydrophobic monomer as a copolymerising monomer, whose solubility in water at 20°C is 0.1% or less, in amount of 30 wt % or more in terms of the total number of all copolymerising monomers, dispersed and stabilised using a resin based on polyvinyl alcohol, modified with acetoacetic groups whose degree of saponification is equal to or greater than 90 mol %, degree of modification with acetoacetic groups lies between 0.01-10 mol %, and average degree of polymerisation lies between 50 and 2000. Described also is an aqueous emulsion obtained through re-emulsion of the said re-emulsifiable powdered resin. Described is an adhesive composition which contains the said re-emulsifiable powdered synthetic resin. The invention also describes an adhesive composition containing said aqueous emulsion.
EFFECT: obtaining re-emusifiable powdered resin for preparing an aqueous emulsion which forms a film with excellent water resistance, resistance to warm water and boiling.
13 cl, 1 tbl, 8 ex
FIELD: instrument making.
SUBSTANCE: invention relates to production of polymer proton-conducting composites and can be used in electrochemical instrument making based on solid-state ionics in producing various electrochemical instruments and devices including those for fuel elements. Proton-conducting composite is made on the basis of liner matrix consisting of the following components, in wt %: 66.6-85.7 of water 5%-solution of poly(vinyl alcohol), proton-conducting solid electrolyte in the form of 6.25-18.75 of phosphatotungsten acid and glycerin plasticiser up to 100 wt %, or of 75.0-85.7 water 5% solution of poly(vinyl alcohol), 6.25-7.15 of salicyl-sulphonic acid and glycerin plasticise up to 100 wt %.
EFFECT: simplified synthesis of composite proton-conducting polymer materials.
2 cl, 1 tbl, 7 ex
SUBSTANCE: present invention relates to a method of producing polymer material, to the polymer material and its use in making moulded chemically or biologically resistant materials or articles, preferably integral articles, as well as a method of moulding such materials or articles and materials and articles made using the said method. The polymer material is obtained by mixing through extrusion a first component and a second component in partial or complete absence of water. The first component is one or more hydrophilic polymers selected from a group comprising polyvinyl alcohols, ethylene vinyl alcohols, polyhydroxyethylmethacrylates, ethylene polyoxides, alkoxyamide block-polymers, air-permeable thermoplastic elastomers and polyurethanes. The second component is polyethyleneimine.
EFFECT: obtained polymer material has air-permeability and neutralising properties required for chemical resistant material, eg for use in chemical or biological protection clothes (for example in military clothes, protective clothing for industrial personnel, gloves, including surgical gloves, packaging for food products etc).
19 cl, 1 tbl
SUBSTANCE: invention can be used in aerospace, automobile industry, in making optical lenses, surface modifiers of glass fibre. In accordance with the invention, the method involves the following stages: mixing a precursor polymer solution with a precursor nanostructure, with formation of a mixture; formation of a nanostructure in a mixture from the nanostructure precursor; and formation of a polymer from the precursor polymer solution so that, nanostructures are introduced into the polymer matrix. The precursor polymer solution can be polyvinyl alcohol, polyvinylbutyral, poly[bis(diethyleneglycol)diallylcarbonate], trimethylolpropane, methylene-bis(4-cyclohexylisocyanate), thiodiethanol. The nanostructure precursor is monobutyltin trichloride, indium acetate, indium-tin oxide, titanium isopropoxide, titanium dioxide. The nanostructures have a spherical, cubic type of polyhedrons, trihedral, pentagonal shape, diamond shape, rod and disc shaped.
EFFECT: design of an efficient method of producing polymers, the matrix of which contains nanostructures.
SUBSTANCE: invention relates to technology of obtaining films based on hydroxyl-containing polymers of increased fire resistance, particularly, to composition for obtaining films and can be applied in different areas of industry and agriculture for fireproof modification of materials based on them. Composition includes in weight fraction: 1.0-5.0 polyvinyl alcohol, 95.0-99.0 water, 0.5 methhylphosphate borate and 2.0 plasticiser. As plasticiser applied is glycerin, ethylene glycol or diethylene glycol.
EFFECT: invention ensures obtaining from said composition fire resistance films with increased durability.
2 tbl, 3 ex
SUBSTANCE: there is offered wheel impregnation composition containing aqueous solution of binding agent, oxyethylated lanolin and liquid glass, where a binding agent is a mixed aqueous copolymer emulsion prepared by emulsion polymerisation of methylolmethacrylamide, vinylacetate, butykacrylate, methylmethacrylate and methacrylic acid in mass ratio 1.0:9.0-9.5:2.5-3.0:3.5-4.0:0.04-0.06 respectively with the composition formulation as follows (wt fractions): copolymer emulsion (on dry basis) - 100, oxyethylated lanolin - 3-8, liquid sodium glass - 1-6, water 360-440.
EFFECT: development of wheel impregnation composition improving resistance of sisal-fabric and sisal-cord wheels with operating cost reduction.
1 cl, 1 tbl, 5 ex
SUBSTANCE: method of producing biodegradable compositions involves treating granules of a hydrophobic polymer with a finishing agent - oleic acid, which is added in batches and adding filler to the hydrophobic polymer, said filler being modified starch THERMTEX, the molecule of which simultaneously contains fragments of ether and ester groups based on phosphoric acid with a different degree of protection. The mixture is thoroughly mixed and extruded at temperature 190-200°C. The invention also relates to a method of producing biodegradable compositions, involving mixing a powdered hydrophobic polymer with filler in form of modified starch THERMTEX, the molecule of which simultaneously contains fragments of ether and ester groups based on phosphoric acid with a different degree of protection. The mixture is thoroughly mixed and extruded at temperature 190-200°C.
EFFECT: improved rheological properties biodegradable polymers, heat-stabilising properties of the obtained product, ensuring good biodegradability of the polymer and obtaining a product with a decorative lustrous surface.
2 cl, 1 tbl, 2 ex