With vinyl aromatic monomers (C08F222/08)

Composite system with high-impact strength and a high softening point // 2627850
FIELD: chemistry.SUBSTANCE: composite material system comprises a layer (a) of a polymer mixture containing or comprising (A) (co) polymer (meth) acrylate or a mixture of (co) polymers (meth) acrylate to at least 30 wt % based on total weight of A), formed from repeating units of methyl methacrylate. The polymer blend comprises B) a (co) polymer of styrene and maleic anhydride, wherein the proportion of repeating units of maleic anhydride is 10-30 wt % of the (co) polymer (B), and the proportion of repeating units of maleic anhydride in the layer (a) of the polymer mixture is 1-27 wt % of layer (a) of the polymer mixture. The composite system comprises (b) optionally one or more layers of optically transparent adhesive, layers of glass and/or optical films, (c) a layer of glass or polycarbonate. The invention also relates to a display that includes a composite material system.EFFECT: reducing the deformation of the display, the shell of the touch screen display or glazing.15 cl, 3 dwg, 2 tbl, 3 ex

Improved solvent for extraction of maleic anhydride from gas stream // 2607762
FIELD: chemistry.SUBSTANCE: invention relates to methods of producing raw maleic anhydride. In particular, method includes steps where: reactor output stream, containing maleic anhydride, is fed into bottom part of absorption column, where it comes into contact with a non-cyclic solvent, that is fed close to its upper part and is a diester, having a boiling point under normal conditions between 250 °C and 350 °C, solubility of fumaric acid at least 0.06 wt% at temperature of 60 °C, solubility of maleic anhydride at least 10 wt% at temperature of 60 °C, water solubility not higher than 100 mg/l, density, different from water density at least to 0.020 g/ml, and a water-soluble hydrolysis product with molecular weight not higher than that of pentanol, with transfer of maleic anhydride of outlet stream of reactor into a solvent, wherein gas stream to be extracted is blown off from absorption column, and enriched solvent, containing maleic anhydride, is removed from absorption column near bottom of absorber and directed into flash tower near its middle part, untreated maleic anhydride is removed from stripping column near its middle or upper part.EFFECT: methods make it possible to use cheaper solvent than phthalates.11 cl, 1 dwg, 1 tbl
Use of particles consisting of core and shell, for giving property of resistance to wicking of thread or textile material // 2552632
FIELD: textiles, paper.SUBSTANCE: invention relates to the use of particles consisting of a core and a shell for coating the thread or textile material with them, to restrain or prevent wicking of water into the said thread or textile material. The particles are described, consisting of a core and a shell, for restraining or preventing the wicking of water into the thread or textile material, where the said particles have an average diameter of 10-300 nm and a mean-square deviation σ which is at least 10% of the average value, in which the shell of the particle consisting of a core and a shell comprises a copolymer of a vinyl aromatic monomer and a maleimide monomer with a glass transition temperature Tg of from 120 to 220°C. Also the thread or the textile material is described, containing aramid threads provided with a finish preparation containing diglyceride or triglyceride obtained from glycerol which is esterified with saturated or unsaturated fatty acids containing 6-20 carbon atoms, where the finished thread or textile material is provided with the above mentioned particles.EFFECT: prevention of wicking of water in the textile material.12 cl, 1 tbl, 2 ex
ethod of producing polymer complex having antiseptic properties and antiseptic coating based thereon // 2535087
FIELD: chemistry.SUBSTANCE: method includes forming, on a surface, a coating from a dimethylalkylbenzylammonium chloride complex containing a C10-C14 alkyl group or a mixture of C8-C16 alkyl groups with a copolymer of styrene and maleic anhydride, which is subjected to preliminary chemical modification to open anhydride rings to form carboxyl groups, 50-60% of which are neutralised to form carboxylate groups, or a mixture of said complex with polyvinyl butyral, in the following ratio, wt %: antiseptic polymer complex 25-40, polyvinyl butyral 60-75.EFFECT: full prolonged protection of articles made of aluminium alloy from fouling by microorganisms, which prevents corrosive change of the surface of said alloys.28 ex, 3 tbl

Reactive block-copolymer and method for production thereof (versions) // 2478657
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing block-copolymers which contain a reactive functional group. Described is a method of producing a block-copolymer, involving: a) reaction of an acrylic monomer, having functional groups which are epoxy, acid, anhydride, amine, amide and hydroxy groups, and one or more vinyl monomers in the presence of a free-radical initiator a stable free radical at the first step to obtain a reaction product which contains a residual unreacted acrylic monomer; and b) reaction at the second step of one or more vinyl monomers with the reaction product from the first step to obtain a second block which contains a residual unreacted acrylic monomer. Also described are versions of said method of producing a block-copolymer. Described is a block-copolymer obtained using said methods, containing: a) a first block which contains monomer links of a functionalised acrylic monomer, having functional groups which are epoxy, acid, anhydride, amine, amide and hydroxy groups, and monomer links of a vinyl monomer; and b) a second block which contains monomer links of one or more vinyl monomers and monomer links of a functionalised acrylic monomer, having functional groups which are epoxy, acid, anhydride, amine, amide and hydroxy groups in the first block. Described is a thermoplastic polymer composition which is used to obtain materials with high impact resistance and mechanical strength, which contains: (a) 1-98 wt % of a first thermoplastic, having functional groups selected from a group consisting of amine, amide, imide, carboxyl groups, carbonyl, carbonate ester, anhydride, epoxy, sulpho, sulphonyl, thionyl, sulphydryl, cyano and hydroxy; (b) 0.01-25 wt % of said block-copolymer, which contains a functional group which is capable of reacting with the functional group in the thermoplastic; and (c) 1-98 wt % of a second thermoplastic polymer which is miscible or compatible with the second block of said block-copolymer.EFFECT: obtaining block-copolymers which can be used as reactive compatibility agents of thermoplastic mixtures of polymers.31 cl, 10 dwg, 14 tbl, 56 ex

Emulsifying polymers and use thereof // 2467984
FIELD: chemistry.SUBSTANCE: invention relates to emulsifying polymers and use of these polymers for stable emulsification of hydrophobic additives in aqueous concrete plasticisers. Disclosed is a polymer P, obtained via copolymerisation (a) of at least one ethylenically unsaturated monomer A selected from a group consisting of unsaturated mono- and dicarboxylic acids, sulphonic acids, phosphonic acids in form of free acids or salts or partial salts or halide or anhydride, with (b) at least one ethylenically unsaturated monomer B of formula , or , where radicals and coefficients are as described in the claim and (c) with at least one ethylenically unsaturated monomer C of formula , where radicals and coefficients are as described in the claim and with (d) at least one ethylenically unsaturated monomer D of formula , where radicals and coefficients are as described in the claim and optionally (e) with at least one basic ethylenically unsaturated monomer E of formula , where radicals and coefficients are as described in the claim and optionally (f) with at least one other ethylenically unsaturated monomer W. Use of the polymer as a plasticiser for water-curable compositions and a water-curable composition are also disclosed.EFFECT: polymer improves quality of mortar.19 cl, 5 tbl
The method of obtaining ammonium salt polyamide copolymer of maleic anhydride and styrene glycol recoletos // 2119501
The invention relates to methods of producing cross-linked copolymers of maleic anhydride with styrene, in particular the production of ammonium salts polyamide copolymer of maleic anhydride and styrene, Recoletos ethylene glycol, which is used to obtain formulations of pesticides, as well as cosmetic, pharmaceutical and veterinary products

A method of obtaining a film-forming copolymer // 2073022
The invention relates to methods for film-forming polymers for paints and varnishes, in particular the production of film-forming copolymer of the bottoms of the distillation of styrene (KORS) and carbonyl compounds
 
2551319.
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