46 results about "Methacrylonitrile" patented technology

The application discloses a high-activity and high-stability catalyst for synthesizing methacrylonitrile and a preparation method and application thereof, and has the technical scheme that (1) manganese dioxide powder is added into an acid solution and placed in an oven, and the manganese dioxide powder is pickled at 120-150 DEG C for 10-24h; the pickling solution is filtered, washed, dried and calcined to obtain a pickling-treated catalyst carrier; (2) a ruthenium precursor is added into a solvent and fully dissolved to obtain a ruthenium solution; the pickling-treated catalyst carrier is added into the ruthenium solution and loaded under ultrasonic, and then the solution is filtered, washed, dried and calcined to obtain a ruthenium monatomic catalyst. The method is simple, the reaction condition is mild, the production cost is low, raw materials are easy to obtain, the conversion rate of methacrolein is high, the yield of methacrylonitrile is high, and the stability is good.

Provided is a method for producing an amide compound from a nitrile compound in the presence of a biocatalyst having nitrile hydratase activity, the method being characterized in that the amide compound is produced from a nitrile compound in the presence of a biocatalyst having nitrile hydratase activity, at least in the case of a liquid composition that becomes a reaction liquid. When the concentration of the nitrile compound in the gas phase part of the reaction tank containing the reaction liquid in the presence of air is within the explosion range, the hydration reaction is carried out under the condition that the oxygen concentration in the gas phase part of the reaction tank is 10 vol% or less. The nitrile compound is preferably, for example, acrylonitrile or methacrylonitrile.

Disclosed herein are amine containing copolymer compositions based on free radical and controlled radical polymerization of monomer compositions including an amine-derivatized alpha-methyl styrene (ADAMS) monomer according to structure (I): with k, R, R1, and R2 defined herein with one or more monomers selected from the group consisting of optionally substituted acrylates, methacrylates, acrylamides, methacrylamides, acrylonitriles, methacrylonitriles, vinyl ethers, N-vinyl amides, or combinations thereof. Further disclosed herein are methods of making and methods for using such copolymer compositions.

A process for the preparation of aryl vinyl sulfones includes reacting an aryl sulfonyl halide with a reaction solvent selected from the group consisting of (meth) acrylonitrile or alkyl (meth) acrylates in a first reaction mixture in the presence of a Cu (I) catalyst to form an intermediate product wherein the Cu (I) catalyst is not complexed. The unreacted reaction solvent is separated from the first reaction mixture to form a second mixture. A low polarity solvent is added to the second mixture to precipitate the Cu (I) catalyst and dissolve the intermediate product to form a third reaction mixture. A base is added to the third reaction mixture, wherein the intermediate product undergoes base-catalyzed elimination of halogen atoms from the intermediate product, preferably under cooling, to form the aryl vinyl sulfone compound. And separating the aryl vinyl sulfone compound from the third reaction mixture.

A process for preparing polyamines via (meth)acrylonitrile and / or crotononitrile addition to an amine followed by hydrogenation in the presence of a catalyst and hydrogen and optionally in the additional presence of ammonia, primary and / or secondary amine, comprises a) reacting at least one amine of general formula (I) with (meth)acrylonitrile and / or crotononitrile, thereby obtaining at least one first intermediate (I1), b) hydrogenating the at least one first intermediate (I1) to at least one polyamine compound (II), or hydrogenating the at least one first intermediate (I1) in the additional presence of ammonia, primary and / or secondary amine.

An aqueous latex [latex (L)] of a vinylidene chloride copolymer [copolymer (A)], wherein the copolymer (A) consists essentially ofrecurring units derived from vinylidene chloride (VDC) in an amount comprised between 89.0 and 91.0 wt % of the copolymer,recurring units derived from methacrylonitrile (MAN) in an amount comprised between 2.00 and 5.50 wt % of the copolymer,recurring units derived from at least one ionic comonomer (ICO) in an amount comprised between 0.5 and 1.4 wt % of the copolymer (A), andrecurring units derived from methylmethacrylate (MMA) in an amount such that the total of recurring units of VDC, MAN, ICO and MMA is 100 wt %,and wherein the latex (L) comprises at least one surfactant [surfactant (S)] in an amount comprised between 0.09 and 1.50 wt % of the copolymer (A).Process for the manufacture of the aqueous latex (L), film made therefrom and retort pouch prepared with such film.

Disclosed in the present disclosure are a foamable composition, a biodegradable PMI foam, and a preparation method therefor. The foamable composition comprises comonomers, an initiator, a foaming agent, and a crosslinking agent, wherein the comonomers comprise a first comonomer and a second comonomer, the first comonomer being one or two selected from methacrylonitrile or acrylonitrile, and the second comonomer being selected from methacrylic acid. The composition further comprises a degradation agent, and the degradation agent is one or a combination of two or more selected from polylactic acid, starch-based polyether polyol and polycaprolactone, the weight ratio of the degradation agent to the comonomers being 30-132:180. The foamable composition of the present disclosure involves scientific addition of the degradation agent and regulation on the formula and uses in-situ polymerization technology, thereby improving the biodegradation rate of the PMI foam while retaining the original high performance of the PMI foam.

The present invention provides an optical film that reduces the yellowing of the liquid crystal panel when viewed from an oblique angle, while maintaining heat resistance and transparency. [Solution] The optical film comprises a resin composition, and the thickness direction phase difference Rth at a wavelength of 590 nm is between -35.0 nm and -5.0 nm. The resin composition comprises an acrylic resin having a methyl methacrylate unit content of 98% by weight or more and a tripletacticity of 55% or more, and a copolymer containing (meth)acrylonitrile units and aromatic vinyl units, and has a glass transition temperature of 120°C or higher. The copolymer has a (meth)acrylonitrile unit content of 22% by weight or more and 28% by weight or less. The optical film has an internal haze of 0.20% or less.

The present application provides a method for preparing (meth) acrylonitrile, the method comprising: a catalytic reaction step of reacting (meth) acrolein with ammonia in a reactor containing a catalyst to produce a crude product comprising (meth) acrylonitrile, unreacted ammonia, unreacted (meth) acrolein, and one or more by-products; and a purification step: separating (methyl) acrylonitrile from the crude product. According to the method, synthesis of (methyl) acrylonitrile can be realized by using a low-cost catalyst through safe, environment-friendly and mild process steps, and effective recycling of materials and heat is realized while generation of toxic impurities is avoided.

This invention relates to the field of foam composite materials technology, specifically to a reinforced polymethacrylamide foam composite material and its preparation method, comprising the following raw materials in parts by weight: 45-50 parts methacrylic acid, 40-45 parts methacrylonitrile, 8-12 parts of a reinforcing filler, 6-9 parts of a modifier / blender, 5-7 parts of a flame retardant, 5-7 parts of hollow glass microspheres, 0.3-0.5 parts of an initiator, 2-5 parts of a foaming agent, 1-3 parts of a crosslinking agent, and 1-2 parts of a nucleating agent. The reinforced polymethacrylamide foam composite material of this invention utilizes methacrylic acid and methacrylonitrile in combination with functional additives such as flame retardants, hollow glass microspheres, and initiators to enhance the product's flame retardancy and thermal insulation properties. Furthermore, through optimized blending and coordination of the raw materials, the product's mechanical properties, flame retardancy, and thermal insulation are improved, while also exhibiting significant weather resistance and corrosion resistance.

The PMI foam comprises the following raw materials: methacrylonitrile, methacrylic acid, a toughening agent, a foaming agent, an initiator and a cross-linking agent. According to the PMI foam, the modified nitrile rubber is used as a toughening agent, so that the PMI foam has excellent toughening performance, and a mixture of ethyl methoxyacetate and methyl 3-methoxypropionate is used for dissolving the modified nitrile rubber when the PMI foam is prepared, so that the dissolving speed of the nitrile rubber can be greatly increased.

Disclosed herein are amine containing copolymer compositions based on free radical and controlled radical polymerization of monomer compositions including an amine-derivatized alpha-methyl styrene (ADAMS) monomer according to structure (I):with k, R, R1, and R2 defined herein with one or more monomers selected from the group consisting of optionally substituted acrylates, methacrylates, acrylamides, methacrylamides, acrylonitriles, methacrylonitriles, vinyl ethers, N-vinyl amides, or combinations thereof. Further disclosed herein are methods of making and methods for using such copolymer compositions.

The invention relates to the technical field of wave-absorbing materials, in particular to wave-absorbing PMI foam and a preparation method and application thereof. The method comprises the following steps: mixing methacrylonitrile, acrylic acid, a retarder, an initiator, a cross-linking agent, a foaming agent and a nucleating agent to obtain a mixed solution; the preparation method comprises the following steps: dissolving sulfonated polyaniline in a mixed solution, carrying out ball milling, and carrying out A reaction to obtain a PMI foaming precursor; the PMI foaming precursor is subjected to foaming treatment in a gradient heating and gradient cooling mode, and the wave-absorbing PMI foam is obtained. According to the invention, the conductive polymer material is adopted as the absorbent, and the problems of absorbent sedimentation and agglomeration caused by density difference between the absorbent and the reaction monomer are solved more fundamentally through mutual dissolution of solutions, so that the uniformity and stability of the performance of the wave-absorbing PMI foam are effectively ensured.

The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same, the separator including a porous substrate and a coating layer located on at least one surface of the porous substrate, wherein the coating layer includes a heat-resistant binder including a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit derived from (meth)acrylaminosulfonic acid, a (meth)acrylaminosulfonate or a combination thereof; an adhesive binder having a core-shell structure; and inorganic particles, wherein the adhesive binder has an average particle diameter of 0.2 μm to 1.0 μm, and the inorganic particles have an average particle diameter of 0.2 μm to 1.0 μm.

The invention provides a method for preparing (methyl) acrylonitrile, which comprises the following step: in the presence of a catalyst, enabling ammonia gas to react with (methyl) acrylic acid and / or (methyl) acrylate to generate (methyl) acrylonitrile. According to the method, raw materials with excellent chemical stability and reaction activity are selected and used, the target product (methyl) acrylonitrile is directly prepared through simplified steps, and excellent target product yield and selectivity can be achieved through the simple and low-cost catalyst.

The invention relates to a method for producing paper or cardboard comprising the steps (A) adding a final polymer A to a first aqueous suspension of fibrous material, thereby creating a second aqueous suspension of fibrous material containing the final polymer A, wherein the final polymer A can be obtained by radical polymerization of the monomers (i) 30 to 90 mol% of a monomer of formula I (I), wherein R1 = H or signifies C1-C6 alkyl. (ii) 3 to 60 mol% of a C1-C4 alkyl ester of acrylic acid or a C1-C4 alkyl ester of methacrylic acid, (iii) 0 to 45 mol% of a monoethylenically unsaturated carboxylic acid, a monoethylenically unsaturated sulfonic acid or a monoethylenically unsaturated phosphonic acid, or salt forms thereof, (iv) 0 to 9 mol% of acrylonitrile or methacrylonitrile, (v) 0 to 35 mol% of one or more ethylenically unsaturated monomers other than a monomer (i), (ii), (iii) and (iv),wherein the total amount of all monomers (i), (ii), (iii), (iv) and (v) is 100% molar, to obtain a starting polymer V, e - hydrolyzing the starting polymer V to obtain the final polymer A, wherein the NC(=O)R1 groups of formula (I) of the monomers (i) polymerized in the starting polymer V are hydrolyzed at least in part and in doing so, form the primary amino groups, wherein the ester groups of the monomers (ii) polymerized in the starting polymer V are converted at least in part and at least part of the conversion is the formation of five-membered lactam structural units with the primary amino groups obtained or the formation of carboxylic acid groups or salt forms thereof, (B) dehydrating the second aqueous suspension of fibrous material containing the final polymer A on a water-permeable substrate to form a wet paper structure, (C) dehydrating the wet paper structure,thus forming paper or cardboard. The resulting paper or cardboard has good dry strength. Other objects of the invention are a paper or cardboard obtainable by the method, a final polymer A, and a starting polymer V.

The invention discloses a solid acid catalyst for preparing methacrylonitrile through dehydration of methacrylamide as well as a preparation method and application of the solid acid catalyst, and provides a multi-component composite metal oxide catalyst which has high activity, high selectivity and good stability through a synergistic interaction effect of all elements. According to the present invention, the catalyst has the high methacrylamide dehydration reaction conversion rate (gt, 85%) and the high methacrylonitrile selectivity (gt, 90%), and the preparation method is simple and controllable, and is suitable for industrial application.

The present invention relates to a water-based binder (1) for coating an anode current collector for a secondary Li-ion battery, wherein the binder (1) comprises an emulsion polymerizate (2) being a copolymerizate of a) 35 to 70 wt.% of styrene, b) 20 to 47 wt.% of aliphatic conjugated diene-based monomer, c) 1 to 15 wt.% of (meth)acrylonitrile, d) 0.1 to 5 wt.% of itaconic acid and / or fumaric acid, e) 0 to 20 wt.% of one or more of auxiliary monomer 1, and1 f) 0 to 5 wt.% of one or more of auxiliary monomer 2, wherein the auxiliary monomers 1 and 2 are selected from a specific list, and wherein the weight portions (wt.%) of the components a) to f) are based on the solid content of the emulsion polymerizate (2) and sum up to 100 wt.%. Claimed is also a process to make the water-based binder (1), an anode active material slurry for coating an anode current collector for a secondary Li-ion battery and an anode for the secondary Li-ion battery comprising the water-based binder (1), as well as the use of the water-based binder (1).

Provided is an electrode binder polymer for a nonaqueous electrochemical device, said electrode binder polymer being a copolymer that contains a constitutional unit derived from at least one monomer (1) of acrylonitrile and methacrylonitrile and a constitutional unit derived from at least one monomer (2) that is selected from the group consisting of an unsaturated carboxylic acid, an unsaturated carboxylic acid alkyl ester, and an unsaturated carboxylic acid amide, wherein the content of the constitutional unit derived from the monomer (2) is 0.1-4.9 mol% with respect to the total amount of constitutional units derived from the monomer (1) and the monomer (2), and the constitutional unit derived from the monomer (2) has a weight-average molecular weight of 10,000 to 450,000.

The application provides a binder and a preparation method thereof, a negative electrode sheet, a battery and an energy storage device, wherein the binder is a lignin graft modified acrylic polymer, monomers forming an acrylic polymer main chain include acrylate, acrylic acid, polyimide and methacrylonitrile; the mass percentage of lignin is 2% to 10% based on the total mass of the binder.

A method for producing an amide compound from a nitrile compound in the presence of a biocatalyst having nitrile hydratase activity includes, at least in the presence of air, when a liquid composition of a reaction solution is such that a concentration of the nitrile compound in a gas phase portion of a reactor containing the reaction solution is in an explosion range, performing a hydration reaction under a condition that an oxygen concentration of the gas phase portion of the reactor is 10% by volume or less. The nitrile compound is, for example, preferably acrylonitrile or methacrylonitrile.

The present invention relates to a heat resistant layer composition, a heat resistant layer formed therefrom, and a separator for a lithium secondary battery, and a lithium secondary battery including same, wherein the heat resistant layer composition includes an acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid or a (meth)acrylate, a structural unit derived from (meth)acrylonitrile, and a structural unit derived from (meth)acrylamidosulfonic acid or a salt thereof; a cross-linking agent including at least one functional group of an aldehyde group, an epoxy group, an amide group, an imide group, an amine group, and a silane-based group; and a solvent.

The present invention relates to a method of using an aqueous dispersion of a polymer P obtainable by radically initiated emulsion polymerization, which comprises polymerizing (a) 40 to 75 parts by weight of at least one vinylaromatic compound, (b) 22.5 to 55 parts by weight of at least one conjugated aliphatic diene, (c) 0.5 to 10 parts by weight of at least one ethylenically unsaturated monomer containing acid groups (dl) 1 to 5 parts by weight of acrylamide and / or methacrylamide, (d2) 1 to 10 parts by weight of acrylonitrile and / or methacrylonitrile (e) 0 to 5 parts by weight of monoethylenically unsaturated monomer having at least one epoxy, hydroxyl, N-methylol or carbonyl group (f) 0 bis 20 parts by weight of at least one other monoethylenically unsaturated monomer, where the amounts of the monomers (a) to (f) add up to 100 parts by weight, at a polymerization temperature in the range of 70 to 95° C., as a polymeric binder in an electrode slurry composition for anodes of secondary batteries, aqueous polymer dispersions itself and a process for producing the aqueous dispersion by radically initiated emulsion polymerization, electrode slurry compositions for anodes comprising the polymer P, an anode of secondary batteries comprising the polymer P, a method of preparing this anode and the lithium ion secondary battery comprising the anode.

The invention relates to the technical field of composite materials, in particular to a preparation method of a polyimide-based aramid fiber reinforced foam composite material. According to the preparation method, methacrylic acid, methacrylonitrile, an initiator, a foaming agent, a nucleating agent, a polymerization inhibitor and a polyimide molecular chain modifier compounded by 4, 4 '-diamino-1, 1'-biphenyl-3, 3 '-dicarboxylic acid and triallyl isocyanurate are prepared into a homogeneous solution, para-aramid fibers are infiltrated by a liquid dispersant and then are arranged in a latticed manner, and then the para-aramid fibers are prepared. The composite material is prepared by bulk or suspension polymerization and segmented heating foaming. The composite material keeps the advantages of high temperature resistance and light weight of polyimide foam, the compression strength, the tensile strength and the shear strength are greatly improved through cooperation of molecular chain modification and fiber reinforcement, the composite material is suitable for high-end fields such as aerospace, the process is easy to standardize, and industrial production is facilitated.

The invention provides high-impact-resistance polymethacrylimide foam, a preparation method and application, and belongs to the technical field of foam materials, and the high-impact-resistance polymethacrylimide foam comprises the following raw materials: methacrylic acid, methacrylonitrile, an initiator, a composite foaming agent and an optional cross-linking agent, the polymethacrylimide foam can enhance energy dissipation and improve structural stability, has excellent impact resistance, and thus can be used in the fields of low-altitude aircrafts and the like.

To provide a polarizer protective film which reduces yellowness when being viewed from an oblique direction of a liquid crystal panel, and can maintain transparency.SOLUTION: A polarizer protective film contains an acrylic resin composition, and has a retardation Rth in a thickness direction at a wavelength of 590 nm of -35.0 nm or more and -5.0 nm or less. The acrylic resin composition contains an acrylic resin having a ring structure at a main chain, and a copolymer containing a (meth)acrylonitrile unit and an aromatic vinyl unit, and has a glass transition temperature of 120°C or higher. The copolymer has a percentage content of the (meth)acrylonitrile unit of 22 wt.% or more and 28 wt.% or less. The polarizer protective film has an external haze of 0.8% or less.SELECTED DRAWING: None

The invention relates to the technical field of foam composite materials, in particular to an enhanced polymethacrylimide foam composite material and a preparation method thereof. Comprising the following raw materials in parts by weight: 45-50 parts of methacrylic acid, 40-45 parts of methacrylonitrile, 8-12 parts of a filler based on an enhancement function, 6-9 parts of a modified blender, 5-7 parts of a flame retardant, 5-7 parts of hollow glass beads, 0.3-0.5 part of an initiator, 2-5 parts of a foaming agent, 1-3 parts of a cross-linking agent and 1-2 parts of a nucleating agent. According to the enhanced polymethacrylimide foam composite material disclosed by the invention, methacrylic acid and methacrylonitrile are matched with functional aids such as the flame retardant, the hollow glass beads and the initiator, so that the flame retardance and the heat preservation property of a product are enhanced; the coordination of mechanical property, flame retardance and heat preservation property of the product is enhanced, and meanwhile, the weather-resistant and corrosion-resistant stability effects of the product are remarkable.

A binder for the non-aqueous electrolyte rechargeable battery includes a particle-shaped binder having a core-shell structure including a hydrophobic core and a hydrophilic shell. The hydrophobic core includes at least one selected from among a derivative from an aromatic vinyl monomer, a derivative from an unsaturated carboxylic acid alkyl ester monomer, a derivative from a (meth)acrylic acid monomer, and a derivative from an unsaturated carboxylic acid amide monomer. The hydrophilic shell includes a derivative from a (meth)acrylic acid monomer, a derivative from a sodium styrene sulfonate monomer, and a derivative from a (meth)acrylonitrile monomer. An amount of the hydrophobic core is greater than or equal to about 90 wt % and less than or equal to about 97 wt %, and an amount of the hydrophilic shell is greater than or equal to about 3 wt % and less than or equal to about 10 wt % based on 100 wt % of the binder.

The invention discloses a method for continuously synthesizing methacrylonitrile from acetone cyanohydrin, which comprises the following steps: (1) adding a catalyst into a reactor, introducing carrier gas, and heating to reaction temperature; (2) after the temperature is stable, introducing the raw materials and auxiliaries into a continuous reactor for reaction; and (3) performing condensation and gas-liquid separation on the product, and rectifying and purifying to obtain methacrylonitrile. According to the method for continuously preparing methacrylonitrile from acetone cyanohydrin, the yield of the product methacrylonitrile is high, the production cost is low, compared with a traditional method, the reaction condition is mild, few three wastes are generated, and the method is particularly suitable for industrial production.

The application relates to a PMI foam which comprises the following raw materials: methacrylonitrile, methacrylic acid, a toughening agent, a foaming agent, an initiator and a crosslinking agent. The PMI foam described in the application has excellent toughening performance by using modified nitrile rubber as the toughening agent, and the dissolution speed of the nitrile rubber can be greatly improved by using a mixture of ethyl-methoxyacetate and methyl-3-methoxypropionate to dissolve the modified nitrile rubber when the PMI foam is prepared.