Copolymer of butyl acrylate, acrylonitrile, and monomethacrylates of ethylene glycol as a polymeric binder for the working layers of magnetic media

 

(57) Abstract:

The copolymer of butylacrylate. Acrylonitrile and monomethacrylate of athienville General formula NSS (CH2-i-)n(-CH2-i-)m(-CH2-i)Ki WITH 0ONC 0 V-SC-CH-CH-HE p - 55 - 72%, m - 20 to 30%. K - 8 - 15%, with srednekamennogo mopm 10000 to 80000. as the polymeric binder for the working layers of the magnetic storage media table 2.

 

Same patents:

FIELD: medical engineering.

SUBSTANCE: device has substrate having polymeric working layer on it, produced from copolymer based on methacrylic acid derivatives with biological macromolecules (probes) immobilized thereon. The substrate is manufactured from activated or not activated glass, metal or polymer material. The working layer has macroporous monolithic copolymer glycidyl methacrylate and ethylene glycol methacrylate taken in (50:70)-(50:30) proportions by mass with affine biological probes immobilized thereon. Probe-copolymer proportion is 2-10 mg/g of copolymer, for protein, 1-20 mg/g of copolymer for peptide and for oligonucleotide, nucleic acid - 0.5-3 mg/g of copolymer, pore radius of 0.4-1.5 mcm, it has thickness of 50-700 microns and is manufactured as continuous or discrete microcellular layer. The method for manufacturing biochip involves preparing substrate, producing working layer by monomer copolymerization on methacrylic acid derivatives base, immobilizing biological macromolecules - probes on forming copolymer, washing, drying the received biochip. Radical copolymerization of glycidyl methacrylate and ethylene glycol methacrylate taken in (50:70)-(50:30) proportions by mass is carried out for producing working layer with photo-or thermal initiation in poregenic solvent medium being applied. Proportion of the sum of monomer volumes to solvent volume being equal to 6:9, initiator concentration in reactionary medium being equal to 0.2-1.0% by weight, given reaction mixture is placed on substrate as continuous or discrete layer. Macroporous monolithic continuous or discrete microcellular layer is formed as a result of copolymerization on the substrate. Then, covalent immobilization of biological macromolecules is carried out in the layer pores or their direct synthesis on formed copolymer with its native or modified epoxy groups being used. Biological affine probe is produced. The probe is introduced into copolymer in quantity of 2-10 mg/g of copolymer for fiber, for peptide - 1-20 mg/g of copolymer and for oligonucleotide or nucleic acid - 0.5-3 mg/g of copolymer.

EFFECT: manufacturing reusable biochip with predetermined controllable and reproduced quality.

17 cl

FIELD: chemistry.

SUBSTANCE: composition for coating of optical transparent information carriers is described, the composition being curable by UV radiation and including (A) from 1 to 60% by mass of at least one colloid oxide of metal, (B) from 0.1 to 50% by mass of at least one silyl acrylate hydrolysis product having a general formula (I): , (I) where a means an integer from 0 to 2, b means an integer from 1 to 3, and the sum a+b is from 1 to 3, R independently means non-branched or branched alkyl residue with 1 to 8 carbon atoms, cycloalkyl residue with 3 to 8 carbon atoms, unsubstituted or substituted aryl residue with 6 to 10 carbon atoms in the aryl portion, R1 independently means hydrogen, non-branched or branched alkyl residue with 1 to 8 carbon atoms, cycloalkyl residue with 3 to 8 carbon atoms, unsubstituted or substituted aryl residue with 6 to 10 carbon atoms in the aryl portion, R2 independently means hydrogen, non-branched or branched alkyl residue with 1 to 8 carbon atoms, unsubstituted or substituted aryl residue with 6 to 10 carbon atoms, R3 means single bond, or non-branched or branched, if necessary, substituted alkylene residue (alkane dienyl residue) with 1 to 8 carbon atoms in alkylene residue, or, if necessary, substituted arylene residue (aryl dienyl residue) with 6 to 10 carbon atoms in arylene residue, (C) from 25 to 90% by mass of at least one acrylate monomer of general formula (II) where n means a number from 1 to 6, R4 means hydrogen, non-branched or branched alkyl residue with 1 to 8 carbon atoms, unsubstituted or substituted aryl residue with 6 to 10 carbon atoms in the aryl portion and where substituents R4 may be the same or different; R5 means unsubstituted or substituted organic residue having a valency from 1 to 6 such as, if necessary, substituted, non-branched or branched aliphatic or aromatic hydrocarbon residue with 1 to 20 carbon atoms, and (D) from 0.01 to 15% by mass of at least one UV photoinitiator, respectively, with respect to the total mass of the composition, the composition being intended for coating transparent, polycarbonate-based, optical information carriers.

EFFECT: proposed composition is scratch-resistant and highly adhesive to the substrate surface.

3 cl, 2 tbl, 4 ex

FIELD: printing.

SUBSTANCE: invention relates to a photopolymerizable composition, the photopolymerizable ink-jet printing, an ink cartridge, an apparatus for discharging ink, a cured product. Photopolymerizable composition comprising: a photopolymerizable monomers containing glycerinedimetacrylate, hexacrylate dipentaerythritol, modified with caprolactone, and diethylene glycol, wherein the amount glycerinedimetacrylate in a photopolymerizable monomer is 25% by weight or more.

EFFECT: creating a photopolymerizable composition which has no problems with the sensitization of the skin, provides a coating having a high film strength.

13 cl, 2 dwg, 4 tbl, 13 ex

FIELD: CHEMISTRY.

SUBSTANCE: method for preparation of low-basic anionites by suspension copolymerisation of acrylonitrile, methylmethacrylate in amount of З-5 wt.%, content of technical grade divinylbenzene being 9-15 wt.% and concentration thereof being 50-60%, in the presence of benzoperoxide in amount of 3.0 wt.% and blowing agent (alkylbenzine, aviation kerosene, decane) in amount of 40 vol.% as regards to monomer volume in suspension media, which consists of water, 25% of sodium chloride or ammonium chloride and 1.5-2.0% of potato starch, when heated at 50°С for 1 hour, at 61-65°С for 4 hours, at 70°С for 2 hours, at 80°С for 1 hour, followed by amination with diethylenetriamine at 130-145°С for 10 hours in the presence of 1.0-1.5% of element sulphur used as a catalyst.

EFFECT: provides for high osmotic stability and high resistance to organic poisoning.

1 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to the field of obtaining subacid carboxylic cation exchange resins with a macro-porous structure. The engineering problem is the obtaining of a subacid carboxylic cation exchange resin with high values of capacity and strength characteristics: full exchange capacity of not less than 2.5 mg Eq/cm3, dynamic exchange capacity of not less than 1600 g Eq/m, and osmotic stability of not less than 98%. High capacity and strength characteristics can be achieved due to the structure of the polymer matrix and conditions for obtaining it. A method is proposed for obtaining the subacid carboxylic cation exchange resin though radical suspension copolymerisation of acrylonitrile and methyl methacrylate with divinyl benzene as a cross-agent, taken in percentage mass quantities of 9-12 % at concentration of 50-60 %, in the suspension medium in the presence of sponging agents (alkyl benzene, aviation kerosene) in percentage volume quantities of 40 % of the volume of monomers during heating and sustaining at 50°C temperature for 2 hours, 61°C for 2 hours, 65°C for 3 hours, 70°C for 2 hours, with subsequent basic hydrolysis of the nitrile group using a 25 % water solution of caustic sodium with gradual increase in temperature from 50°C to 110°C and sustenance at temperature of 110°C for a period of 10 hours.

EFFECT: obtaining of a subacid carboxylic cation exchange resin with high values of capacity and strength characteristics.

1 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: proposed is a method for synthesis of porous weakly-basic anionites through copolymerisation of acrylonitrile and divinylbenzene in the presence of blowing agents and a benzoperoxide polymerisation initiator, with subsequent aminolysis of the copolymers with polyamines with an elementa-y sulphur catalyst, where acrylonitrile and divinylbenzene are copolymerised at pressure 1.2-2.7 atm with addition into the polymerisation mixture of unsaturated compounds selected from a group comprising acrylic esters, styrene, methyl- and ethylstyrene, with content of acrylonitrile not less than 67.5 mol %, divinybenzene 8-20 % and molar ratio of acrylonitrile to the rest of the unsaturated components not greater than 2.5:1, and aminolysis is carried out with triethylene tetramine and diethylene triamine in the presence of 0.1-0.5 % elementary sulphur.

EFFECT: improved method.

1 cl, 4 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to methods of obtaining weakly acidic carboxylic cationites used in sorption processes in hydrometallurgy, biotechnology and heat engineering. A method is described for obtaining carboxylic cationites through suspension copolymerisation of acrylonitrile, divinylbenzene and methacrylic acid in the presence of a blowing agent and a polymerisation initiator - benzoyl peroxide in a medium of a water-salt solution of potato starch containing 20% sodium or ammonium chloride, or in a medium of an aqueous solution of cellulose, with subsequent alkaline hydrolysis of nitrile groups of the copolymer, with 71-76.5% acrylonitrile, 8-12% divinylbenzene, 5-10% methacrylic acid content in the polymerisation mixture and using a blowing agent in form of butylacetate in amount of 15-40% of the volume of the mixture of monomers.

EFFECT: design of an efficient method of obtaining weakly acidic carboxylic cationites.

4 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to low-viscosity polymer-polyols used as components in synthesis of polyurethanes and a method for synthesis of said polymer-polyols. The polymer-polyols have hydroxyl number ≥35, having solid substance content of 45-65 wt % and viscosity less than or equal to be[2,7c]. The polymer-polyols are a product of reaction of a basic polyol, a stabiliser obtained beforehand and at least two ethylene-unsaturated monomers in the presence of a free-radical polymerisation initiator and at least one polymer-regulating agent. The basic polyol has hydroxyl number between 60 and 400 and functionality between 2 and 4.

EFFECT: obtaining stable polymer-polyols, having low viscosity, high content of solid substance and good filterability.

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing acrylonitrile from glycerine. The method involves a first step for gas-phase dehydration of glycerine in the presence of a catalyst having Hammett acidity, denoted by H0, less than +2, at temperature ranging from 150°C to 500°C and at pressure and at pressure ranging from 1 to 5 bar, to obtain acrolein; a second step for ammoxidation of acrolein on an ammoxidation catalyst at temperature ranging from 300°C to 550°C and at pressure ranging from 1 to 5 bar, to obtain acrylonitrile; and an intermediate step for partial condensation of water and heavy byproducts obtained at the dehydration step. The invention also relates to acrylonitrile with 14C content of the order 10-10 wt % with respect to total weight of carbon which can be obtained using the method given above.

EFFECT: method enables to optimise the acrolein ammoxidation step by reducing the amount of water and impurities in a stream rich in acrolein.

3 cl, 2 dwg, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to methods for synthesis of selective sorbents for extracting gold from solutions and pulp. The method is realised by diethylenetriamine aminolysis of a porous copolymer of acrylonitrile, divinylbenzene and styrene, with weight content of acrylonitrile of 34-45%, divinylbenzene - 12.5-20%, styrene - 20-46% and ethylstyrene 8-14%. The copolymer is synthesised by suspension copolymerisation of a mixture consisting of said monomers, benzoyl peroxide as a polymerisation initiator, a mixture of ammonium chloride solution and hydroxyethyl cellulose as a suspension medium, alkylbenzene as blowing a agent.

EFFECT: invention enables to obtain easily regenerated ionite for sorption of gold from cyanide hydrometallurgical media.

2 cl, 2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to production of acrylonitrile copolymers. Described is a method for synthesis of copolymers of acrylonitrile with itaconic acid derivatives through mixing thereof in a solvent medium with addition of a radical polymerisation initiator and heating, the method characterised by that heating is carried out to temperature of 65-85°C, the solvent used is supercritical carbon dioxide, the itaconic acid derivatives used are monoesters or monoamides thereof, and content of the itaconic acid derivatives in the copolymer ranges from 0.01 to 4 mol.%. Also described is a method for synthesis of copolymers of acrylonitrile, itaconic acid derivatives and methyl acrylate through mixing thereof in a solvent medium with addition of a radical polymerisation initiator and heating, the method characterised by that heating is carried out to temperature of 65-85°C, the solvent used is supercritical carbon dioxide, the itaconic acid derivatives used are monoesters or monoamides thereof, and content of the itaconic acid derivatives in the copolymer ranges from 0.01 to 4 mol.% and content of methyl acrylate ranges from 0.01 to 4 mol.%.

EFFECT: obtaining copolymers of acrylonitrile with itaconic acid derivatives using an environmentally safe, cheap and energy-efficient method with high output.

2 cl, 1 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: claimed invention relates to obtaining acrylonitrile copolymers. Described is method for synthesis of acrylonitrilecopolymers, consisting in carrying out reaction of polymerisation of acrylonitrile with comonomers in carbon dioxide medium at temperature from 65 to 80°C, where itaconic acid or its derivatives is used as comonomers, characterised by the fact that thyols, determined by formula R-SH, where R represents saturated hydrocarbon radical with number of carbon atoms from 2 to 20, are added into initial reaction mixture.

EFFECT: reduction of product polydispersity to required level.

8 cl, 3 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an anionic initiating system, as well as to a method of producing fibre-forming polyacrylonitrile and acrylonitrile copolymers using the initiating system. The initiating system contains carbon, hydrogen, nitrogen and oxygen atoms and consists of a lower olefin oxide and a bicyclic tertiary amine or diamine, wherein at least one tertiary nitrogen atom belongs to both rings and is located at the vertex of the bicyclic structure. The method of producing polyacrylonitrile and acrylonitrile copolymers includes polymerising acrylonitrile or copolymerising acrylonitrile with an oxygen-containing monomer under the effect of said initiating system. The process is carried out in polar aprotic solvents.

EFFECT: invention enables to control in a wide range molecular weight values and molecular weight distribution parameters of polymers, cut the reaction time from a few hours to a few minutes and obtain polymers which do not contain hard to remove impurities.

7 cl, 19 ex

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