22 results about "Methacrylonitrile" patented technology

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 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.

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.

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 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 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 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 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.

This invention belongs to the field of catalytic ammonia oxidation technology, and specifically relates to a Ru / AMn2O4 catalyst for the gas-solid phase synthesis of methacrylonitrile, its preparation method, and its application. The catalyst preparation includes the preparation of an AMn2O4 spinel support, AMn2O4 spinel support pretreatment, and Ru / AMn2O4 catalyst preparation. The catalyst of this invention, prepared by the above method, possesses advantages such as high activity at low temperature, high stability, high conversion rate of methacrolein, high yield of methacrylonitrile, and low yield of the byproduct hydrogen cyanide. It is particularly suitable for use as a catalyst in the gas-solid phase ammonia oxidation of methacrolein to 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.

The invention discloses a preparation method of methacrylonitrile, and belongs to the technical field of nitrile compound preparation. The method comprises the following steps: enabling a solution containing methacrylamide to pass through a reactor loaded with a solid acid catalyst, and carrying out a dehydration reaction to obtain a target product methacrylonitrile; wherein the solid acid catalyst is prepared by sequentially carrying out ammonium salt treatment, acid treatment, metal salt treatment and roasting on a molecular sieve; the structure type of the molecular sieve is one or a combination of more than two of MWW, FER, MTT, MFI, MEL, MOR, FAU, CHA or BEA molecular sieves. The raw materials of the catalyst are cheap, the preparation process is simple, industrial large-scale production is easy, when the catalyst is used for preparing methacrylonitrile, reaction conditions are mild, the conversion rate of methacrylamide and the selectivity of methacrylonitrile are obviously improved, industrial amplification is easy, and the catalyst has a very good industrial application prospect.

Provided is a method for producing a glove using a dip-molding composition that contains: an elastomer including structural units derived from (meth)acrylonitrile, structural units derived from an unsaturated carboxylic acid, and structural units derived from butadiene in the polymer main chain; an epoxy crosslinking agent; water; and a catalyst, the pH of the dip-molding composition being 9.0 or higher, and the catalyst being used for reacting the elastomer and the epoxy crosslinking agent.

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 discloses a wave-absorbing foam material which comprises a first comonomer, a second comonomer, a third comonomer, an initiator, a foaming agent, a cross-linking agent, a first absorbent and a second absorbent, the first comonomer comprises one or two of methacrylonitrile and acrylonitrile, the second comonomer comprises methacrylic acid, the third comonomer comprises methacrylic acid, and the third comonomer comprises methacrylic acid. The third comonomer comprises methacrylamide; the first absorbent is a first absorbent; the second absorbent is an iron-based absorbent. The invention also discloses a preparation method of the light broadband wave-absorbing foam material, the prepared light broadband wave-absorbing foam material has the characteristics of light weight and broadband absorption, the overall density is less than 200kg / m < 3 >, the electromagnetic wave reflectivity of 1-18GHz is less than-10dB, and the light broadband wave-absorbing foam material has very good popularization and application values.

A method for preparing an aryl vinyl sulfone includes the step of reacting an aryl sulfonyl halide in a first reaction mixture with a reactive solvent selected from (meth)acrylonitrile or alkyl (meth)acrylate in the presence of an uncomplexed Cu(I) catalyst to form an intermediate product. The unreacted reactive solvent is separated from the first reaction mixture to form a second reaction mixture. A low-polarity solvent is added to the second reaction 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, preferably under cooling, and the intermediate product undergoes elimination of halogen atoms from the intermediate product by a base catalyst to form an aryl vinyl sulfone compound. This aryl vinyl sulfone compound is separated from the third reaction mixture.

This invention discloses a method for preparing a catalyst for the one-step preparation of methacrylonitrile from n-propionaldehyde. The catalyst obtained by this method, under the combined action of carbon dioxide, water vapor, and ammonia, converts n-propionaldehyde into methacrylonitrile in one step. The catalyst is an acidic oxide containing iron and manganese, with a composition of FeM... x Q y Mn z X a P m O n Where M and Q refer to one or more of vanadium, chromium, cobalt, molybdenum, niobium, tungsten, etc., and X refers to one or more of magnesium, aluminum, titanium, zirconium, etc. Compared with other methods, this method can obtain methacrylonitrile from n-propionaldehyde in one step, while consuming CO2, and has great industrial application value and prospects.