Method of producing linear block-copolymers (meth) acrylic monomers

FIELD: chemistry.

SUBSTANCE: method of producing linear block-copolymers of methacrylic monomers involves sequentially synthesizing the first and the second blocks of copolymers by the controlled radical polymerization. At the first stage, obtaining a polymethacrylate initiator is carried out through the synthesis of its monomer A with dinitrile of isoiso-butyric acid used as an initiator, and 4,6-di-tert-butyl-N-(2,6-diisopropylphenyl)-o-imino-benzoquinone used as a polymerization regulator, when their molar ratio of monomer: initiator: polymerization regulator as 1000:(1÷8):(1÷8) for 3-20 hours at a temperature of 70°C, at the second stage obtaining a diblock-copolymer is carried out by the copolymerization of the obtained polymethacrylate initiator with the monomer B, in their weight ratio of (10-25):(90-75) for 1-15 hours at a temperature of 70°C. The monomer B is not styrene, or styrene is used as the azeotropic mixture with methyl methacrylate as the monomer B if methacrylate is used as the monomer A or styrene is used as the monomer B when n-butylmethacrylate is used as the monomer A.

EFFECT: production of finely dispersed block-copolymers of various molecular weights and with the variation of monomeric compositions.

7 cl, 2 tbl, 3 dwg



Same patents:

FIELD: chemistry.

SUBSTANCE: invention refers to an elastomeric thermoplastic composition having a compression resistance at a temperature of 20°C to 100°C containing hydrated styrene-butadiene thermoplastics. The thermoplastics forming the above composition are linear or radical, are characterised by the vinyl content of 35.8 to 60 wt %, the styrene content of 30 to 41 wt %, a molecular weight of 200,000 to 600,000 and the Brookfield viscosity at 5 wt % in cyclohexane of less than 300 cP. What is also described is a method for producing the composition, the product prepared by pressure casting or extrusion of the composition.

EFFECT: good processibility, adequate compressive strength of the non-vulcanised and vulcanised compositions.

33 cl, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method includes successive radical polymerisation of three monomers in presence of catalyst, whereas catalyst applied is complex compound of ruthenium with carborane fragment, initiator, whereas initiator applied is carbon tetrachloride, and activator. As monomers methylmethacrylate, isoboronylmethacrylate and tret-butylmethacrylate are applied. As activator isopropylamine is applied, and as catalyst 3,3-{[1',1'-diphenyl-6'-phenyl-6'-(6',8-µ-(o-phenylene))]-1',6'-diphosphohexane}-3-chlorine-closo-3,1,2-dicarbollylruthenium is applied.

EFFECT: obtaining copolymers of required composition with low polydispersity with application of lower catalyst concentrations.

2 cl, 3 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a chelate amphiphilic polymer as a carrier, a particle as a carrier containing a self-assembling structure of a chelating amphiphilic polymer (polymersome), contrast agents for CEST MRT, SPECT, PET or Spectral CT, containing said particle, and a method of producing the particle. The chelate amphiphilic polymer is capable of aggregation and contains a hydrophilic block (MA), having a chelating moiety (X) as a terminal group and a hydrophobic block (MB), wherein the polymer has the formula X-[MA]n - [MB]m, (i), where n and m are integers ranging from 3 to 1000000, which represent the number of monomer links forming the corresponding blocks. The hydrophilic block is selected from polyethylene oxide, polymethacrylic acid, polyacrylamide derivatives, polyvinyl alcohol or polyhydroxyethylmethacrylate, hydrophilic polypeptides and sugar derivatives. The hydrophobic block is selected from polybutadiene, polyisoprene and polyethylethylene. The chelating moiety is selected from a group comprising polyphosphates, amino carboxylic acids, 1,3-diketones, hydroxy carboxylic acids, polyamines, amino alcohols, aromatic heterocyclic bases, phenols, amino phenols, oximes, peptides containing proximal chelate functional groups, Schiff bases, tetrapyrroles, sulphur compounds, synthetic macrocyclic compounds, phosphonic acid or a combination of two or more of said compounds.

EFFECT: invention provides chelate amphiphilic polymers which are capable of self-assembling and are suitable for use in vulcanisation methods.

14 cl, 7 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: method of producing membranes involves preparing a solution containing an organic solvent and a unneutralised block-copolymer in a micellar form. At least one amine is added to the solution. The amine is a polyfunctional amine containing two to four nitrogen-containing functionalities, and contains at least two nitrogen-containing functionalities bonded to each other through a linear, branched or cyclic aliphatic bridge fragment. Said solution is then moulded into a membrane containing a sulphonated block-copolymer. Before neutralisation, said sulphonated block-copolymer has at least one terminal block A and at least one inner block B. Each block A essentially does not have any sulphonic acid or sulphonate ester functional groups, and each block B is a polymer block containing from about 10 to about 100 mol % sulphonic acid or sulphonate ester functional groups with respect to the amount of monomer links of block B, which are unneutralised, where each block A contains one or more segments selected from polymerised (i) para-substituted styrene monomers, (ii) ethylene, (iii) alpha-olefins containing 3 to 18 carbon atoms, (iv) 1,3-cyclodiene monomers, (v) monomer conjugated dienes with pre-hydrogenation vinyl content of less than 35 mol %, (vi) acrylic esters, (vii) methacrylic esters and (viii) mixtures thereof. Each block B contains segments of one or more vinyl aromatic monomers selected from polymerised (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) and mixtures thereof.

EFFECT: obtaining a membrane with improved physical and chemical properties.

24 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention provides a crystalline coordination copolymer, a method for production thereof and a method for use thereof. Production involves assembling multiple organic molecules to obtain porous materials with frame structures having layered configurations or "core-shell" configurations. Said materials are synthesised by step-by-step growing methods such as seed growing methods. The disclosed coordination copolymer includes at least a first region of a first coordination polymer, characterised by a first X-ray diffraction pattern, and a second region of a second coordination polymer, characterised by a second X-ray diffraction pattern, where the first and second coordination polymers are not identical, and where the X-ray diffraction pattern of the coordination copolymer simultaneously includes a set of peaks of the first X-ray diffraction pattern and a set of peaks of the second X-ray diffraction pattern.

EFFECT: invention provides a simple method of controlling functionality depending on the field of use.

10 cl, 5 dwg, 7 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to resorbable block copolymers for producing resorbable surgical or therapeutic implants for humans and animals. The block copolymer is of type AB or ABA. Block A is formed by polyester and block B is formed by polyether. Type AB has the formula: E-(O-D-CO-)n-(O-CH2-CH2-)m-O-F, where the structural link E-(O-D-CO-)n forms block A, and link -(O-CH2-CH2-)m forms block B. Type ABA has the formula: E-(O-D-CO-)n-(O-CH2-CHr)m-O-(CO-D-O-)n'-E, in which links E-(O-D-CO-)n and E-(O-D-CO-)n. form block A, and link -(O-CH2-CH2-)m forms block B. Content of block B ranges from 0.1 to 4 wt %. The invention also relates to a method of producing and cleaning said block copolymers contaminated with monomers.

EFFECT: obtaining block copolymers or implants from said block copolymers, characterised by high mechanical strength, elasticity, viscosity and fast kinetic resorption.

42 cl, 3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer of formula (I): In-[(A)x-(B)y-( A')x-(E)z]n, obtained via controlled free-radical polymerisation using nitroxyl radicals with excess acrylate. In is a fragment of an initiator. A and A' are identical or different monomers selected from a group comprising methylacrylate, ethylacrylate, ethylhexylacrylate, propylacrylate, cyclohexylacrylate, hydroxyethylacrylate, n-butylacrylate, styrene and vinylpyridine. The amount of unsubstituted C1-C22 alkyl acrylic esters and/or C1-C22 alkyl methacrylic esters is more than 30 wt %. B is propargylacrylate. E is a group containing at least one stable nitroxyl free radical.

EFFECT: obtaining polymers suitable for use as a wetting or dispersing agent for dyes, as well as starting material for all reactions starting with alkyne or for hydrosilylation reactions.

8 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: method for preparation of functionalised, bound or star-block copolymer used in sulphur-cured rubber composition containing carbon char and having in cured state decreased hysteresis with at least one of said blocks containing polyisoprene and at least one other block consisting of diene elastomer different from polyisopren with mole content of repeating units of one or more of conjugated dienes exceeding 15% includes: copolymerisation of one or more monomers containing at least one conjugated diene different from polyisoprene with catalitycal system containing hydrocarbon solvent halogenated or unhalogenated metal-organic compound A of the group IIIA metal, alkaline-earth metal compound B and polymer initiator C containing bound C-Li formed by unfunctionalised monolythium-containing polyisopren intended for formation of the said block or every polyisoprene block and (ii) adding to the product of the said polymerisation of the functionalising, binding or star-shape forming agent containing acetoxy group of formula Rn-Sn-(O-CO-R')4n> whereat n is integer natural number from 0 to 4 and R and R' each represents following groups: alkyl, cycloalkyl, aryl, aralkyl, same or different, for functionalisation or binding or forming of star-shape structure of the said block consisting of dien elastomer different from polyisopren. The said one or more polyisopren blocks have number average molecular mass Mn1 from 2500 to 20000 g/mole, the said one or more dien elastomer blocks have number average molecular mass Mn2 from 65000 to 350000 g/mole. Functionalised, bound or star-block copolymer, curable or cured rubber composition with lowered hysteresis in cured state, containing reinforcing filler completely or partially consisting of carbon char and containing aforementioned functionalised, bound or star-block copolymer are described also. Pneumatic tyre tread containing aforementioned rubber composition is described as well as pneumatic tyre containing described above tread.

EFFECT: hysteresis decrease of cured the rubber composition.

36 cl, 5 ex

FIELD: chemistry, medicine.

SUBSTANCE: complex matrix consists of at least one biologically compatible polymer of natural origin, structured with sewing agent, which represents two- or multi-functional molecule, selected from epoxides, epihalohydrines and divinyl sulphone, on said polymer inoculated are chains with molecular weight less than 50000 daltons, selected from polymers of natural origin of small size, preferably, derivatives of cellulose or other biological polymer derivatives which naturally are not present in human organism, and/or non-polymerised chains with properties of oxidation inhibitors or ability to inhibit reactions of matrix decomposition, preferably, vitamins, enzymes or molecules, consisting of one or several cycles, degree of inoculation, expressed as ratio of moles of inoculated molecules and quantity of moles of polymer units, constitutes from 10 to 40%. Also described are method of obtaining such matrix and its application for separation, replacement, filling or addition of biological fluid or tissues.

EFFECT: increase of application efficiency.

20 cl, 7 ex, 2 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention refers to radical polymerization method of halogenated polymers production. Radical polymerization method is applied for halogenated polymers production. Besides radical polymerization method is used for polymer production of chlorinated vinyl monomer(s). Method implies usage of (A) one or more ethylene non-saturated monomers at least one of which is selected from chlorinated vinyl monomers group, (B) molecular iodine and (C) one or more radical generating agents selected from diazo-compounds, peroxides and dialkyldiphenylalkans. Method includes stages according to which at least a part of each compound (A), (B) and (C) are placed into reactor. Then reactor content interacts as optional residue of each compound (A), (B) and (C) is added until at most 70 moles % chlorinated vinyl monomer(s) placed into reactor react(s), if ethylene non-saturated monomer or monomers placed into reactor are exclusively chlorinated vinyl monomer(s), or until at most 95 moles % chlorinated vinyl monomer(s) placed into reactor react(s), if at least one ethylene non-saturated monomer placed into reactor is non-halogenated monomer. Then reaction is carried through. This method is used for production of polymer with number-average molecular weight Mn more than 1,0x104 and ratio Mz/Mw lower than 1.65. Radical polymerization method is applied for block-interpolymer production at least one block of which is polymer block of chlorinated vinyl monomer(s) containing (A') one or more ethylene non-saturated monomers and (B') one or more polymers of chlorinated vinyl monomer(s) selected from polymers produced by stated method and intermediate block-interpolymer. Block-interpolymer characterized with number-average molecular weight Mn more than 1.5x10 and polydispersity ratio Mw/Mn lower than 1.60. Product is made of one or more specified chlorinated vinyl monomer(s) and block-interpolymer. It is possible to reactivate polymer chain growth from chlorinated vinyl monomer(s) by additional mutual reaction, even after release from polymerization medium that makes possible to produce block-interpolymers containing at least one polymer block of chlorinated vinyl monomer(s). Products based on specified polymers have improved mechanical properties.

EFFECT: method enables to synthesize polymers from chlorinated vinyl monomer.

18 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to an oxolanyl compound-containing composition and use thereof. Described is a vinyl content modifier composition which contains at least one oxolanyl compound selected from a group consisting of: where R1 and R2 are independently hydrogen or an alkyl group and the total number of carbon atoms in -CR1R2- ranges from 1 to 9 inclusively; R3, R4 and R5 are independently -H or -CnH2n+1, where n=1-6, wherein said at least one oxolanyl contains at least 52 wt % of the meso-isomer of the at least one oxolanyl compound, wherein a residue is formed from D- and L-isomers. Described also is a polymerisation method, which includes a step of polymerising at least one conjugated diene monomer in the presence of at least one organometallic anionic initiator and said composition comprising to obtain a polydiene polymer characterised by vinyl content in the range of 10% to less than 100%. Described also is a polydiene (co)polymer obtained using said method, a tyre containing said polydiene (co)polymer. Described is polymerisation method, which includes polymerising 1,3-butadiene in the presence of an oxolanyl compound 2,2-di(2-tetrahydrofuryl)propane, which contains at least 52 wt % of a meso-isomer, wherein the residue is formed from D- and L-isomers, wherein said method leads to the production of a polydiene polymer, characterised by vinyl content in the range of 10% to 100%, using an organolithium anionic initiator, and carrying out the method such that the peak polymerisation temperature is in the range of 85°C to 120°C. Also described is a tyre containing a polydiene (co)polymer.

EFFECT: high activity of the composition which contains an oxolanyl compound when used as a vinyl content modifier in polymerisation methods.

24 cl, 6 dwg, 5 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of polymerising a styrene monomer in the presence of a bromated fire retardant. Described is a method for suspension polymerisation of a styrene monomer to obtain polystyrene, the method comprising steps of: a) heating a polymerisation suspension containing a styrene monomer to at least 60°C, b) feeding an initiator into said heated polymerisation suspension during a polymerisation reaction for a period of 2-4 hours continuously or periodically in at least two portions, wherein said period begins at monomer conversion of 65% or less, and said initiator is characterised by half-life, at temperature at which said initiator is fed, of not more than 60 min, where during the polymerisation reaction, the bromated fire retardant is present in the polymerisation suspension.

EFFECT: polymerising styrene in the presence of a bromated fire retardant to obtain polystyrene, having at least the same molecular weight as polystyrene obtained in the absence of a fire retardant.

11 cl, 2 tbl, 9 ex

Polymer dispersions // 2555027

FIELD: chemistry.

SUBSTANCE: invention refers to coating compositions containing dispersions of multi-stage polymers, to a method for producing the above dispersions and using the coating compositions. The dispersion is prepared by two-stage emulsion polymerisation the first stage of which involves carrying out a reaction of (A1) at least one (meth)acrylic acid alkyl ester with 1-4 carbon atoms, (B1) at least one vinylaromatic compound containing up to 20 carbon atoms and (C1) at least one hydroxyalkyl(meth)acrylate with 1-4 carbon atoms in the presence of at least one initiator; the second stage involves radical co-polymerisation of a co-polymer (A2) prepared at the first stage with at least one (meth)acrylic acid alkyl ester with 1-8 carbon atoms.

EFFECT: compositions are used for one-component or two-component coatings applied on polymers, wood, paper or metal, or as an adhesive.

21 cl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a tertiary amine group-containing (meth)acrylate copolymer by free-radical solution polymerisation of a mixture of monomers, containing: a) 30-70 wt % alkyl ether of acrylic acid or methacrylic acid with 1-4 carbon atoms in alkyl groups, b) 70-30 wt % alkyl ether of acrylic acid or methacrylic acid with a tertiary amine group in the alkyl radical and c) 0-10 wt % other copolymerisable vinyl monomers. The mixture of monomers is mixed with one or more polymerisation initiators, optionally one or more chain-terminating agents and one or more solvents, and a polymerising mixture is obtained. The mixture is polymerised at 30-120°C for 2-24 hours to form a styrene polymer which degassed by distillation or extrusion to obtain a copolymer.

EFFECT: obtaining a copolymer with molecular weight (Mw) of 25000-75000 g/mol, polydispersity of 2,1-2,9 and residual solvent content of less than 1000 ppm.

7 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to controlling olefin polymerisation. Described is a method of polymerising olefins, which includes polymerisation of at least one olefin monomer in more than one polymerisation zone in one or more reactors. Polymerisation is carried out in an apparatus having one or more reaction vessels into which an olefin monomer and catalyst components are fed and which contain a stirred layer of the formed polymer particles. The polymerisation method includes steps of: feeding into a first polymerisation zone one or more olefin monomer streams with hydrogen concentration of about 0-70 mol %; feeding into the next polymerisation zone one or more olefin monomer streams with hydrogen concentration of about 0-70 mol %; removing from the last polymerisation zone the obtained polymer with polydispersity of about 5-20. The amount of gaseous hydrogen fed into the reaction vessels by a recycling gas feeding system is set to maintain a constant flow rate of the melt of the obtained polymer.

EFFECT: controlling content of the obtained composition in different polymerisation zones, widening and controlling the molecular weight distribution of the polymer.

9 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to bis(acyl)phosphine oxide of formula (I) and based on it radiation-curable compositions, which can be applied in the chemical industry: , where R represents C1-C18 alkyl.

EFFECT: claimed are novel effective polymerisation photoinitiators and based on them compositions.

24 cl, 5 ex, 3 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to (meth)acrylate polymer, which is obtained by polymerising a mixture comprising a) 0.1 to 99.9 wt % of at least one (meth)acrylate of general formula where residues R1-R6 and m assume values given in the description, and b) 99.9 to 0.1 wt % of one or more ethylenically unsaturated monomers which are different from (a) and are compolymerisable with (a), wherein components (a) and (b) constitute 100 wt % of the polymerisable components of the mixture, wherein MW of the polymer ranges from ≥1000 to ≤50000 g/mol. The formed polymers can be used as UV initiators for polymerisation reactions used in printing ink.

EFFECT: obtaining (meth)acrylate polymers which can be used as polymer initiators or ink additives.

26 cl, 2 tbl, 3 dwg, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a multimodal polyolefin polymer and an apparatus for production thereof. A method of production at temperature of 40-150°C and pressure of 0.1-20 MPa in the presence of a polymerisation catalyst in a first and a second polymerisation reactor connected in series, where in the first reactor a first polyolefin polymer is obtained in suspension in the presence of hydrogen and in the second reactor a second polyolefin polymer is obtained in the presence of a lower hydrogen concentration than in the first reactor, the method comprising: a) withdrawing from the first reactor a suspension of solid polyolefin particles in a suspension medium containing hydrogen; b) feeding the suspension into a flash drum at a lower pressure than that of the first reactor; c) vaporising part of the suspension medium; d) withdrawing a hydrogen-depleted suspension from the flash drum and feeding it into the second reactor; e) separating gas from the gas-phase of the flash drum and feeding it into a heat exchanger; f) condensing part of the gas separated from the flash drum; and g) returning the liquid obtained in the heat exchanger to the polymerisation process at a point where suspension is present.

EFFECT: apparatus for producing a multimodal polyolefin polymer is described.

14 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of inhibiting the polymerisation of (meth)acrylic acid and/or esters of (meth(acrylic acid by the introduction of an oxygen-containing gas into (meth)acrylic acid and/or ester of (meth)acrylic acid, and (meth)acrylic acid and/or ester of (meth)acrylic acid has at least a 95% purity degree, contains an anti-polymerisation stabiliser and is in the liquid aggregate state; introduction of the oxygen-containing gas is performed into the pipeline, which contains liquid (meth)acrylic acid and/or liquid ester of (meth)acrylic acid, which is supplied to fill the reservoir through a side output opening as the pure product after the distillation or rectification purification in the column. The content of oxygen, for instance, in liquid acrylic acid can reach 12 ppm.

EFFECT: elaboration of the method for the inhibition of (meth)acrylic acid polymerisation.

8 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: photopolymerisable composition contains a thermoplastic polymer, a solvent, a dimethacrylic compound and a photoinitiator. It differs by the fact that the thermoplastic polymer contains polyvinylbutyral; the solvent is hydroxyalkyl(meth)acrylate specified in a group of 2-hydroxyethylmethacrylate, 2-hydroxyethylacrylate, 2-hydroxypropylmethacrylate or 2-hydroxypropylacrylate; the dimethacrylic compound is phosphorus chlorine dimethacrylate; the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone in the following proportions, weight portions: polyvinylbutyral 1-10, hydroxyalkyl(meth)acrylate 10-60, phosphorus chlorine dimethacrylate 30-80, 2-hydroxy-2-methyl-1-phenyl-1-propanone 1-2.

EFFECT: producing uncoloured optically transparent polymer materials highly adhesive to silicate glass and low combustible.

1 tbl, 7 ex

FIELD: producing of polymer products from methacrylate and other (meth)acrylate monomers.

SUBSTANCE: continuous method for production of polymer products includes radical polymerization of methylmethacrylate systems or its mixture with other (meth)acrylate monomers or vinylacetate in presence of radical polymerization initiator to produce polymer-monomer system followed by physico-mechanical treatment (e.g. extrusion) and simultaneous depolymerization. Method of present invention makes it possible to carry out polymerization with conversion of approximately 100 %.

EFFECT: polymer products with improved physicochemical properties; simplified polymerization process.

11 cl, 8 ex, 1 tbl