84 results about "Methacrylonitrile" patented technology

The invention relates to a foamable composition, biodegradable PMI (polymethacrylimide) foam and a preparation method thereof. The foamable composition comprises comonomers, an initiator, a foaming agent and a cross-linking agent, the comonomers comprise a first comonomer and a second comonomer, the first comonomer is selected from one or two of methacrylonitrile or acrylonitrile, and the second comonomer is selected from methacrylic acid; the composition also comprises a degradation agent, and the degradation agent is selected from one or a combination of more than two of polylactic acid, starch-based polyether polyol and polycaprolactone; the weight ratio of the degradation agent to the comonomer is (30-132): 180. According to the foamable composition disclosed by the invention, the biodegradation rate of the PMI foam is improved and the original high performance of the PMI foam is reserved by scientifically adding the degradation agent and adjusting the formula and adopting an in-situ polymerization technology.

The invention relates to the technical field of polymethacrylimide foam, in particular to polymethacrylimide wave-absorbing foam and a preparation method thereof. The high-temperature-resistant acrylic resin is prepared from the following raw materials in parts by weight: 55 to 60 parts of methacrylic acid, 45 to 55 parts of methacrylonitrile, 5 to 8 parts of 1-amino octadecane, 0.3 to 0.6 part of N-acrylamide, 0.4 to 0.7 part of N-hydroxysuccinimide ester, 0.5 to 1.2 parts of carbodiimide, 4 to 7 parts of tridecyl methacrylate, 2 to 8 parts of functional filler, 0.35 to 0.40 part of initiator, 0.6 to 0.8 part of foaming agent, 12 to 15 parts of cross-linking agent and 8 to 12 parts of absorbent. 21-35 parts of modified cellulose, 12-25 parts of a biomass-based additive, and 5-18 parts of a dispersant. The prepared polymethacrylimide wave-absorbing foam is relatively good in mechanical property, and shows excellent chemical stability under the conditions of room temperature and extremely low temperature.

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.

To provide a water dispersion of a vinylidene chloride copolymer capable of forming a coated film suppressed in yellow tint in a roll state while keeping high water vapor barrier property, and a film and a paper laminate having a vinylidene chloride copolymer layer suppressed in yellow tint in a roll state while keeping high water vapor barrier property.SOLUTION: A water dispersion of a vinylidene chloride copolymer makes a coated film having less than 0.8 g / m2 / day of a water vapor transmittance (38°C, 90%Rh) per 50 g / m2 of a coated film, and more than 2.2% of a haze per 50 g / m2 of a coated film. A film for blister packaging has a layer constituted by coating with the water dispersion of the vinylidene chloride copolymer, where the water vapor transmittance (38°C, 90%Rh) is 0.4 g / (m2 / day) or less, the haze is 3.0% or more, and the vinylidene chloride copolymer includes 1.0-15 mass% of a structural unit derived from methacrylonitrile.SELECTED DRAWING: None

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.

The invention discloses a preparation method of a sulfonation catalyst for synthesizing methacrylonitrile, which comprises the following steps: adding carrier powder with large specific surface area into a beaker, and then adding an acid solution into the beaker; after uniformly stirring, carrying out suction filtration, washing and drying to obtain a carrier subjected to acid pickling treatment; adding the carrier subjected to acid pickling treatment into a hydrothermal kettle with a polytetrafluoroethylene lining, adding a sulfonation reagent and an organic reagent A, sealing the hydrothermal kettle, putting the hydrothermal kettle into a drying oven for treatment, and then performing suction filtration, washing and drying to obtain a carrier subjected to sulfonation treatment; weighing a manganese precursor and an auxiliary agent precursor, adding the manganese precursor and the auxiliary agent precursor into a beaker, adding an organic reagent B, magnetically stirring to fully dissolve, adding the sulfonated carrier into the beaker, stirring at room temperature, filtering, washing, drying, and finally roasting in a muffle furnace to obtain the sulfonation catalyst. Carrier vacancies are obtained through acid pickling, sulfonic acid groups, active elements and auxiliary elements can be effectively anchored, and the catalyst is good in stability.

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 invention provides a preparation method of rare earth PMI composite wave-absorbing foam, which comprises the following steps: mixing methacrylonitrile and methacrylic acid, adding a foaming agent, an initiator and a cross-linking agent, uniformly stirring and mixing, pouring into a polymerization mold, sealing the polymerization mold, keeping the temperature in a constant-temperature water bath environment, demolding to obtain a PMI prepolymer, and drying to obtain the rare earth PMI composite wave-absorbing foam. Then, the PMI prepolymer is smashed, and PMI prepolymer particles are obtained; the method comprises the following steps: pretreating a composite wave-absorbing agent by adopting a surfactant, wherein the composite wave-absorbing agent comprises yttrium-doped cobalt powder and a carbon nanotube; adding the pretreated composite wave-absorbing agent into epoxy resin, uniformly mixing to obtain a dipping material, uniformly mixing PMI prepolymer particles and the dipping material, injecting into a mold, heating the mold in a foaming furnace, cooling to room temperature, and demolding to obtain the composite wave-absorbing foam. The foam provided by the invention can give full play to the advantages of the rare earth wave-absorbing agent and the carbon-series wave-absorbing agent, has good and stable mechanical properties and wave-absorbing properties, and has good military application value.

Provided is a dip molding emulsion including, at least: an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain; an epoxy crosslinking agent; water; and a pH modifier, in which dip molding composition the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20% by weight to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1% by weight to 10% by weight, and the butadiene-derived structural unit in an amount of 50% by weight to 75% by weight, and the epoxy crosslinking agent includes an epoxy crosslinking agent containing an epoxy compound having three or more epoxy groups in one molecule and has a dissolution rate in water of 10% to 70% as determined by a specific measurement method.

The invention relates to the field of immobilized enzymes, and discloses coated immobilized nitrile hydratase as well as a preparation method and application thereof and a preparation method of methacrylamide. The coated type immobilized nitrile hydratase comprises immobilized nitrile hydratase and polyethyleneimine coated on the surface of the immobilized nitrile hydratase. The coated immobilized nitrile hydratase provided by the invention has high recovery rate, can catalyze substrate hydration in a high-concentration ethylenically unsaturated nitrile substrate (such as methacrylonitrile), and can still maintain high relative residual enzyme activity after being repeatedly used for many times.

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 method for manufacturing a semiconductor device includes forming a bottom layer on a substrate. The bottom layer includes a polymer having a main polymer chain with a side chain target group and a side chain organic group or a side chain photoacid generator group. The main polymer chain is polystyrene, polyhydroxystyrene, polyacrylate, polymethyl acrylate, polymethyl methacrylate, polyacrylic acid, polyvinyl ester, polymethacrylonitrile or polymethacrylamide. The side chain target group is a substituted or unsubstituted C2 to C30 diol group, C1 to C30 aldehyde group or C3 to C30 ketone group. The side chain organic group is a C3 to C30 aliphatic or aromatic group having a photosensitive functional group, and the side chain photoacid generator group is a substituted C3 to C50 aliphatic or aromatic group. A photoresist layer is formed on the bottom layer. The photoresist layer is selectively exposed. The exposed photoresist layer is developed to form a pattern.

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 the field of foamed plastic materials, in particular to high-strength poly (methyl) acrylimide foamed plastic as well as a preparation method and application thereof. The high-strength poly (methyl) acrylimide foamed plastic is prepared from the following raw materials: methacrylic acid, acrylonitrile, methacrylonitrile, copolymerized modified resin, additive particles, an initiator, a cross-linking agent, a foaming agent and the like. The foamed plastic finally prepared in the invention has excellent mechanical strength, balances the contradiction between the strength and part of other properties, and also can maintain good thermal stability, waterproofness, chemical stability and the like. Therefore, the comprehensive performance of the foamed plastic is greatly improved, the performance requirement of the foamed plastic in the prior art is met, and the foamed plastic has wide application potential.

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.