Method for producing of unsaturated polyester resins aqueous emulsion

FIELD: technological processes.

SUBSTANCE: invention relates to an unsaturated polyester resin aqueous emulsion production method, intended for use as a film-forming component of the lubricant applied to the surface of elementary fibers (filaments) when forming a complex yarn during the manufacturing of glass, basalt and carbon fibers. Method is implemented by introducing an unsaturated polyester resin with a molecular weight of 1,000–1,200, a poly-condensation product of glycols with phthalic anhydride and allomaleic acid, not containing an active styrene diluent, with constant stirring at a speed of 1,000–6,000 rpm at room temperature into a non-ionic surfactant aqueous solution, which is a high molecular weight block co-polymer of ethylene oxide and propylene oxide, and after the end of feeding the named resin, the emulsification is continued for 10–40 minutes. Emulsion production formulation comprises, by weight: unsaturated polyester resin 100, block co-polymer of ethylene oxide and propylene oxide 8–15, water 50–150.

EFFECT: ensuring uniformity of emulsions, high colloidal-chemical resistance, high dispersity and the possibility of using glass and basalt fibers in production.

1 cl, 2 tbl

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: method includes preparing a mixture of microcrystalline cellulose hydrogel, polyvinyl alcohol, ethyl alcohol, glycerine and quercetin, while observing the sequence of adding components to the composite mass and step-by-step homogenisation. The obtained composite can be used as a base for producing materials with different properties by adding different additives or is subjected to an additional drying step to obtain a film which has an integral structure, is capable of absorbing moisture, freezes at temperature of up -18°C without loss of properties, has the same strength as polyethylene films, has no spontaneous deformation, is biodegradable in natural conditions and has improved antioxidant properties.

EFFECT: product is environmentally safe and can be used in protecting food products from spoiling and prolongs shelf life of food products containing different types of fats.

2 cl

FIELD: chemistry.

SUBSTANCE: invention relates to emulsion aggregation and is used to produce toner. A method of producing a latex emulsion for producing toner particles, which includes contacting at least one polyester with an organic solvent and a stabilising agent containing a carbodiimide to form a polymer mixture, stirring the polymer mixture, adding a neutralising agent and deionised water to form an emulsion and separating latex particles from the emulsion by contacting the latex particles optionally with a dye, optionally with wax and optionally with an additive or amorphous polyester resin.

EFFECT: invention reduces hydrolytic decomposition of the polymer and prolongs storage of the emulsion before producing toner.

9 cl, 1 tbl, 4 ex, 3 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a composite moisture-retaining material, which can be used in crop production for the improvement of water-air and nutritional mode of soil, as well as for the recovery of vegetation on soils of various types. The composite moisture-retaining material is made on the base of acryl copolymer and filler. The acryl copolymer is made on the base of acrylamide and acrylic acid salts with a ratio of 20/80-80/20 mol. % in the presence of a cross-linking agent N,N'-methylene-bis-acrylamide and a polymerisation initiator. As the filler used is a mixture of wastes of biocatalytic productions of acryl monomers and acids of humic acids with a ratio of 99/70-1/30 wt % by dry substance in the form of a water paste or a dry powder-like form. The total content of the filler constitutes to 60 wt %. A method of obtaining the composite moisture-retaining material is described.

EFFECT: reduced cost of the moisture-retaining material, presence of an additional source of plant nutrition, simplification of technology of a filled gel manufacturing with the preservation of water-sorption properties at the level of existing filled and non-filled analogues.

2 cl, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention deals with ultrahigh molecular weight polyethylene (UHMWPE), modified with nanosized particles of tantalum pentoxide. It is applied for the obtaining polycomposite materials, which can be applied in microelectronics, medicine and other fields. It is obtained by the addition of benzyl alcohol to a UHMWPE benzene solution. The formed reaction mixture is mixed at a rate of 400-500 rev/min in boiling for 5-6 hours. Then, it is filtered, washed with benzene, the solvent is distilled. After that, a benzene solution of tantalum pentachloride is added to the reaction mass in a quantity corresponding to the molar ratio of tantalum pentachloride to benzene alcohol, equal to 1:5-5.3. Then the obtained reaction mass is mixed at the same rate in boiling for 3-4 hours, cooled and the target product is separated by filtering, extraction with chloroform and vacuum distillation of the solvent.

EFFECT: extension of application fields of materials with higher physical-mechanical properties.

3 dwg, 2 tbl, 2 ex

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to nano-fibrillar cellulose gels, intended for wide application in industry and in wound healing. A method of their production includes (a) preparation of cellulose fibres; (b) preparation of at least one filler and/or pigment; (c) combination of the cellulose fibres and the filler and/or pigment; (d) fibrillation of the cellulose fibres in the presence of at least one filler and/or pigment to formation of gel from primary fibrils, the filler and/or pigment are selected from the group, including precipitated calcium carbonate, natural crushed calcium carbonate, dolomite, talc, bentonite, clay, magnesite, satin white, sepiolite, huntite, diatomite, silicates and their mixtures. A nano-fibrillar cellulose gel, obtained by the method described above and its application are also described.

EFFECT: invention provides the increased productivity of nano-fibrillar cellulose gels with energy efficiency of production.

16 cl, 8 dwg, 2 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining composite particles, which consists in condensation of one or several silicon compounds of general formula (RO)nSiR14-n (1), in which R stands for optionally substituted alkyl or aryl residue with 1-20 carbon atoms or hydrogen atom, R1 stands for optionally substituted hydrocarbon residue or hydrogen atom and n stands for number from 1 to 4, or one or several products of its condensation in presence of solvent or mixture of solvents and one or several soluble polymers. As soluble polymers used are polymers of vinyl esters with 6-15 wt % of ethylene-unsaturated carboxylic acids and optionally 0.3-2 wt % of ethylene unsaturated silanes, polymers of vinyl esters with 0.3-2 wt % of ethylene unsaturated silanes, polymers of (met) acrylates with 6-15 wt % of ethylene unsaturated carboxylic acids and optionally 0.3-2 wt % of ethylene unsaturated silanes or polymers of (met)acrylates with 0.3-2 wt % of ethylene unsaturated silanes. Soluble polymers at temperature within the range from 1 to 100°C and at pH within the range from 2 to 12 are soluble in amount at least 1 g per litre of solvent or mixture of solvents. Thereof obtained products of condensation of silicon compounds are fixed on one or several soluble polymers.

EFFECT: invention ensures obtaining composite particles, which possess stability in storage in dispersion form.

12 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing synthetic latex from rubber. The method comprises steps of: (a) emulsifying a binding substance containing rubber, which is dissolved in a suitable organic solvent, together with an aqueous surfactant solution to form an oil-in-water emulsion; (b) step-by-step reduction of content of solvent in the oil-in-water emulsion in two or more steps, resulting in formation of synthetic latex. Also described is a reactor with continuous mixing for removing the organic solvent from the oil-in-water emulsion, which contains rubber dissolved in the organic solvent.

EFFECT: reducing the amount of residual solvent to very low levels with high efficiency of the process.

19 cl, 2 dwg, 1 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: claimed is carbon-containing material, obtained by pyrolysis of xarogel from hydrophilic polymer of polyhydroxybenzol/formaldehyde type and nitrogen-containing latex. Polymer and latex are co-crosslinked. Material represents carbon monolith, containing from 0.1 to 20% of graphite by weight of total material weight. Material contains system of pores, at least, 10% of which are mesopores, with pore volume constituting from 0.4 to 1 cm3/g. Material is characterised by presence of, at least, 3 successive characteristic peaks in the spectrum of X-ray diffraction. Claimed are: method of material obtaining and gel for its obtaining. Claimed material is used for production of electrodes and as filling agent in production of electric current-conducting components.

EFFECT: obtaining material with controlled porosity and reduction of material resistivity.

14 cl, 2 dwg, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing multilayer films which absorb oxygen and articles made from said films, having a coating with a well dispersed oxygen absorbent. The oxygen-absorbing composition contains iron powder particles with mean size of 1-25 mcm with a coating of at least one activating and oxidising powdered compound in form of solid organic and inorganic salts of alkali and alkali-earth metals, such as sodium chloride and sodium bisulphite. The particles are dispersed in a polymer resin by extrusion in a double-auger mixer. The composition is mixed with polymer granules in a solid state before melting. Granules of the polymer resin and iron powder with coating are preferably treated with a surfactant in dry state to ensure good dispersion. The extruded molten composition is granulated and kept in dry state to prevent premature activation.

EFFECT: obtained films are used as parts of graphic design in form of a soft container having a graphic image.

8 cl, 1 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a sizing composition for glass fibres, particularly meant for reinforcing organic and/or inorganic matrices, the obtained glass fibres as well as composite materials containing said glass fibres. The sizing composition for glass fibres in form of a physical gel contains the following, wt %: 0.1-5 of at least one texturising agent selected from xanthanes, guar gum and succinoglycans; 2-8 of at least one film-forming agent; 0.1-8 of at least one compound selected from a group consisting of plasticisers, surfactants and dispersants; 0.1-4 of at least one binder; 0-6 of at least one additive. The subject of the invention is also glass fibres coated with said sizing composition and composite materials containing an organic or inorganic material which is reinforced with said glass fibres.

EFFECT: reduced migration of the sizing agent when drying coils.

23 cl, 1 dwg, 6 tbl, 34 ex

FIELD: process engineering.

SUBSTANCE: proposed method comprises preparing crystallisable polymer melt. This process includes the steps that follow. Processed, mainly, amorphous initial polymer pellets are introduced in crystallisation reactor (1) to be partially crystallised at heating without smelting. Then, produced partially crystallised polymer is discharged from said reactor (1). Note here that at least a portion of said polymer is discharged and fed to said reactor (1) for reverse mixing for reduction in susceptibility of sticking. This process differs from know processes in that discharged, partially crystallised polymer is combined and mixed with initial polymer before reverse mixing in reactor (1). Then, said mix is fed in said reactor (1). Note here that said reactor (1) is communicated with transfer section including carrier (3) and inclined slope (5) for discharge of at least a portion of partially crystallised polymer for reverse mixing in said reactor (1). Invention covers also the device for process implementation.

EFFECT: efficient mixing of pellets without sticking.

19 cl, 10 dwg

FIELD: chemistry.

SUBSTANCE: method of obtaining an aliphatic polyester, possessing an increased molecular weight, includes stages (i) of a quantitative introduction of diisocyanate in a polyester-based prepolymer, which has a number-average molecular weight of 5000 or higher and contains terminal hydroxyl groups, and in which at least one acidic component is represented by a succinic acid compound in a melted condition at a temperature not lower than its fusion temperature, where the quantity of disiocyanate is equivalent to the value between one tenth and double quantity of the hydroxyl groups in the prepolymer based on the aliphatic polyester, (ii) a quantitative and continuous introduction of the prepolymer based on the aliphatic polyester, containing diisocyanate, obtained at stage (i), in a mixing vessel, its unloading from the mixing vessel at mixing and its supply into a reservoir for a reaction of combination and (iii) realisation of the interaction of the prepolymer based on the aliphatic polyester with diisocyanate in the reservoir for the reaction of combination.

EFFECT: method is continuous and makes it possible to obtain the aliphatic polyester, possessing an increased molecular weight with the lower probability of gelation and lower formation of fish-eye defects.

10 cl, 3 dwg, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of modifying the surface of a polyethylene terephthalate granulate in order to increase heat-, light-, wear- and hydrolytic resistance, as well as reduce gas permeability of polymer materials. The method involves treating the surface of a polyethylene terephthalate granulate with a modifier while heating. The modifier used is a mixture of fluorine-containing prepolymers in amount of 2 pts.wt per 100 pts.wt polyethylene terephthalate in weight ratio of 83(I):12(II+III):5(IV), represented by formulae (I)-(IV) in the claim. Said compounds are obtained in advance by reacting 4,4'-diphenylmethane diisocyante with 1,1,5-trihydroperfluoropentanol-1 in the presence of catalytic amounts of di-n-butyltin dilaurate in molar ratio of 1:1:0.005, respectively, in a medium of chlorobenzene and n-hexane in volume ratio of 8:1, at temperature of 80°C, ultrasound frequency 40 kHz for 2 hours. Modification is carried out in a medium of chlorobenzene at 150°C for 4 hours.

EFFECT: method widens the operating temperature range of articles made from polyethylene terephthalate.

3 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of modifying the surface of a polyethylene terephthalate granulate in order to increase heat-, light-, wear- and hydrolytic resistance, as well as reduce gas permeability of polymer materials. The method involves treating the surface of polyethylene terephthalate with a modifier while heating, wherein the modifier used is a fluorine-containing prepolymer with isocyanate groups in amount of 2 pts.wt per 100 pts.wt polyethylene terephthalate of general formula: , n=5-7, m=2-4. Said modifier is obtained by reacting polymethylene polyphenylene isocyanate with content of isocyanate groups of 29.5-31.0% with trifluoroacetic acid in the presence of catalytic amounts of di-n-butyl tin dilaurate with molar ratio of reactants of 1:0.3:0.003, respectively, in a medium of o-dichlorobenzene at temperature of 70°C, ultrasound frequency of 40 kHz for 6 hours. Modification is carried out in a medium of chlorobenzene at 150°C for 4 hours in the presence of catalytic amounts of di-n-butyl tin dilaurate.

EFFECT: modifying the surface of a polyethylene terephthalate granulate using said method enables to widen the operating temperature range of articles made from polyethylene terephthalate.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for thermal stabilisation of a polymer obtained by ring-opening polymerisation, as well as a method of producing polyhydroxy acids, a method of analysing metal residues in a polymer and polylactide. Said polymer contains residues of a Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III) or Ge(II)-containing catalyst. Thermal stabilisation is carried by treating the polymer at temperature higher than melting point thereof with a peroxide in amount of at least 0.2 wt % based on the weight of the polymer. The peroxide is selected from a group consisting of ketone peroxides, organic hydroperoxides, peracids, hydrogen peroxide and mixtures thereof. Molar ratio of peroxy functional groups from said peroxide to metal ranges from 1 to 100. Said metal is selected from a group consisting of Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III) and Ge(II). The method of producing polyhydroxy acids involves converting one or more monomers, dimers and/or oligomers of a hydroxy acid to a polyhydroxy acid using a Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(Il), Ti(III), Mn(II), Mn(III) or Ge(II)-containing catalyst and treating the obtained polyhydroxy acid with a peroxide. The method of analysing metal residues in a polymer involves dissolving the polymer in an organic solvent, adding Fe(III), oxidising the metal and reducing Fe(III) to Fe(II), adding water, complexing the Fe(II) to form a coloured complex, determining content of Fe(II) and establishing content of metal in the polymer.

EFFECT: optimising a method for thermal stabilisation of polymers obtained by ring-opening polymerisation, particularly polylactic acid.

16 cl, 5 tbl, 3 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method for thermal treatment of polyester granules for fractional crystallisation, where molten polyester is fed into an underwater granulation system and granulates. The obtained granulated material is loaded at a short distance from the underwater granulation system into a device for separating the water/solid phase. The dried granulated material is fed into a treatment apparatus without supply or external energy or heat at temperature above 100°C, and thermal treatment for fractional crystallisation takes place due to inherent heat of the granulated material. The treatment apparatus is made in form of reactor which at least inclined, in which the granulated material is fed at temperature above 100°C, passes through it from the loading point to the discharge point under the effect of its own weight and comes out at temperature above 130°C.

EFFECT: disclosed thermal treatment method simplifies the process of fractional crystallisation owing to use of inherent heat of the granules.

7 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: proposed is a method of drying or concentrating polymers capable of being biologically destroyed from polyhydroxyalkanoate, polycaprolactone, polymeric lactic acid, poly-glycolic acid, poly-(lacto-glycolic) acid, polymeric succinic acid, or their mixtures, or their copolymers. Polymer contained in solution or biomass, is subjected to microwave radiation for a period of time, sufficient for decreasing the concentration of polar solvent in the above mentioned solution or biomass respectively to 0.0001%-100%. The specified action causes destruction to the polymer from 0 to 25%.

EFFECT: drying of biopolymers without their destruction.

7 cl, 13 dwg, 5 ex

FIELD: chemical industry; methods and the devices of the thermal treatment of the polyethylene terephthalate granules.

SUBSTANCE: the invention is pertaining to the methods of the thermal treatment of the granules of the polyester and the device for the method realization. The technical result of the invention is development of the method of crystallization of the polyethylene terephthalate (PET) granules, which is realized without feeding of the exterior power or heat. The invention offers the method of the thermal treatment of the PET granules for achievement of the partial crystallization providing for feeding of the PET molten bath into the submerged granulator of the thermal cutting, its granulation, feeding of the gained granulate into the device separating the water and the solid substance, where the crystallization starts and the drained granulate with the granulate temperature exceeding 100°С is guided to the transporter, from which the granulate comes out with the temperature exceeding 100°С. The invention also offers the device for realization of this method.

EFFECT: the invention represents the development of the method of crystallization of the polyethylene terephthalate (PET) granules, which is realized without feeding of the exterior power or heat.

12 cl, 1 dwg

The invention relates to the crystallization of the prepolymers of homopolymers of polyethylenterephtalate and their copolymers and their transfer to the solid state

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyether-ester polyols, wherein starting compounds with Zerewitinow-active hydrogen atoms (a) react with at least one alkylene oxide (b) in the presence of at least one amine (c), selected from a group consisting of a tertiary amine, unsubstituted imidazole and substituted imidazole, in the presence of at least one fatty acid ester (d) and where 99 wt % of the starting compounds with Zerewitinow-active hydrogen atoms (a) are embedded in the obtained polyether-ester polyol, wherein component (d) is added before, during or after dosing component (b), and before dosing component (b) the polyether-ester polyol (e) in amount of 3.0-20.0 wt % with respect to all components (a), (b), (c), (d) and (e) is mixed with components (a), c and optionally (d). The invention also describes a polyether-ester polyol obtained using said method, use thereof to make foamed polyurethane material and the foamed polyurethane material.

EFFECT: creating a method of producing polyether-ester polyols which enables to completely embed fatty acid esters into the formed polyether-ester polyols, which in turn improves holding capacity of foam material compositions for hydrocarbon-based foaming agents, thereby enabling fast production of flexible solid foam.

15 cl, 4 dwg, 4 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to interlayer film for laminated glass and laminated glass, which contains claimed film. Interlayer film for laminated glass includes soundproof layer, for which temperature T1, which is the temperature giving maximal value of tangent δ at frequency 1 Hz, lies in the range from -30°C to 0°C. Soundproof layer contains 71-160 wt.p. of plasticiser relative to 100 wt.p. of polyvinyl acetal resin, which has 3 or 4 carbon atoms in acetal group, or 50-80 wt.p. of plasticiser relative to 100 wt.p. of polyvinyl acetal resin, which has 5-12 carbon atoms in acetal group. Laminated glass contains claimed interlayer film, placed between two transparent sheets.

EFFECT: obtaining interlayer film for laminated glass and based on it laminated glass, which ensures soundproof action for solid-induced sound in the environment at 0°C or lower temperature.

12 cl, 7 tbl, 53 ex

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