128 results about "Methacrylic acid copolymer" patented technology

The invention relates to the technical field of feed additives, in particular to a feed additive capable of supplementing nutrition and a preparation method, and the feed additive comprises the following components in parts by weight: 20-40 parts of an amino acid mixture, 10-25 parts of a vitamin compound, 15-30 parts of a mineral mixture, 5-15 parts of a plant extract and 30-50 parts of a carrier substance, the preparation method has the beneficial effects that the sodium alginate / chitosan / methacrylic acid copolymer is used as a wall material to carry out microencapsulation on amino acids and vitamins, and the encapsulation efficiency is gt; 95%. Oxygen, moisture and illumination are effectively isolated, so that the retention rate gt of the vitamins stored for 6 months under the room temperature condition is gt; 90%.

The present invention relates to a debondable solvent-borne pressure sensitive adhesive composition comprising a) a (meth)acrylate co-polymer formed from the monomers selected from the group consisting of ethyl (meth)acrylate, methyl acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 3-epoxypropyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, hydrogenated polybutadiene(meth)acrylate, glacial acrylic acid, vinyl acetate, and mixtures thereof; b) an electrolyte selected from the group consisting of 1-butyl-3-methylimidazolium bis(trifluoromethylsolfonyl)imide, 1-ethyl-3-vinylimidazolium methanesulfonate, 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, tributyl(ethyl) phosphonium diethyl phosphate, trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)amide and mixtures thereof; c) a cross-linker; and d) a solvent.

The present invention discloses an aviation composite material resistant to lightning damage, comprising two layers of carbon fiber composite panels, wherein a graphite honeycomb sandwich layer is bonded between the carbon fiber composite panels by a conductive adhesive film, wherein the honeycomb sandwich gaps are internally filled with thermoplastic microcapsules injected with polyethylene-methacrylic acid copolymer, and the surface of the carbon fiber composite panel is provided with C / C-SiC composite fasteners. The aviation composite material resistant to lightning damage of the present invention has the characteristics of high electrical conductivity, light weight and self-repairability, and solves the problem that carbon fiber composite materials are easily damaged by lightning in the prior art.

The present invention belongs to the technical field of lithium battery separators, and relates to a five-layer co-extruded dry-process lithium battery separator and a preparation method thereof. The dry-process lithium battery separator adopts a symmetrical five-layer co-extruded structure of A / B / C / B / A; A is the outer layer, and the raw materials include maleic anhydride copolymerized styrene grafted polypropylene; B is the transition layer, and the raw materials include styrene-methacrylic acid copolymer and homopolymerized polypropylene; C is the inner layer, and the raw materials include linear low-density polyethylene and polycaprolactone; the upper and lower surfaces of the inner layer are both in contact with the transition layer, and the side of the transition layer away from the inner layer is in contact with the outer layer. The present invention achieves a synergistic effect by optimizing the raw materials of the multi-layer separator to reduce the thickness of the separator without affecting the mechanical properties of the separator, and combines the five-layer co-extrusion technology to obtain a five-layer co-extruded dry-process lithium battery separator with high mechanical properties, high stability and high precision.

The present invention discloses a glass fiber reinforced polypropylene material, a preparation method thereof, and an application thereof. The glass fiber reinforced polypropylene material of the present invention comprises the following components, by weight: 60 to 80 parts of polypropylene resin, 20 to 40 parts of glass fiber, 0.3 to 3 parts of copolymer, and 0.2 to 2 parts of stearate lubricant; the copolymer is one or more of ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, and ethylene-methacrylic acid-acrylic acid copolymer. The glass fiber reinforced polypropylene material of the present invention utilizes the separation effect of glass fiber and resin at the melt flow front of the composite material to improve welding performance. By using a special copolymer as a compatibilizer to regulate the degree of separation of glass fiber and resin at the melt flow front, and using a special lubricant to promote the bonding of the melt during the welding process, the good mechanical properties of the glass fiber reinforced polypropylene material are maintained while significantly improving its hot plate welding performance.

A purpose of the present invention is to provide a pressure-sensitive adhesive composition which has a satisfactory pot life and can exhibit excellent adhesive force. Another purpose is to provide a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition. Still another purpose is to provide a method for producing a pressure-sensitive adhesive tape using the pressure-sensitive adhesive composition. This pressure-sensitive adhesive composition comprises an alkyl (meth)acrylate in which the alkyl group has 4-20 carbon atoms, a (meth)acrylic copolymer, and one or more crosslinking agents, wherein the (meth)acrylic copolymer includes a constituent unit derived from a monomer containing an active-hydrogen-containing functional group and the crosslinking agents include a crosslinking agent (a), which is a monomer having both a functional group that reacts with the active-hydrogen-containing functional group contained in the (meth)acrylic copolymer and a functional group including a carbon-carbon unsaturated double bond. The pressure-sensitive adhesive composition contains no solvent, or the pressure-sensitive adhesive composition contains a solvent and the content of the solvent in the pressure-sensitive adhesive composition is 10 mass%.

The invention relates to the technical field of oilfield chemistry, in particular to a nano-composite viscosity reducer, a preparation method, application and a high-viscosity thick oil viscosity reduction method. According to the preparation method, the nano composite viscosity reducer is prepared from a surface-modified nano oxide and an amphiphilic polymer through a solvent exchange method; the nano oxide is nano silicon dioxide nano particles, zinc oxide nano particles or ferric oxide nano particles, and the amphiphilic polymer is a partial esterification product of a styrene-maleic anhydride copolymer or an octadecyl acrylate-methacrylic acid copolymer. According to the preparation method, the viscosity reducer not only can efficiently disassemble a colloid asphaltene network structure, but also has a certain catalytic modification function, does not influence subsequent treatment of crude oil, and has the advantages of high viscosity reduction efficiency, lasting effect, no formation of stable emulsion, shear resistance, good temperature resistance, strong universality and the like.

The invention relates to a PET material as well as a preparation method and application thereof. The PET material is prepared from the following components in parts by weight: 75 to 95 parts of PET resin, 2 to 10 parts of PCTG, 3 to 8 parts of flexibilizer, 2 to 5 parts of glass flake and 0.2 to 1 part of poly alkyl glycol dibenzoate. The toughening agent comprises an ethylene-methacrylic acid copolymer and / or ethylene-butyl acrylate. According to the PET material provided by the invention, the PET resin and the PCTG are taken as base materials, the ethylene-methacrylic acid copolymer and / or ethylene-butyl acrylate are / is taken as a toughening unit, the glass flakes are taken as a reinforcing framework, and the poly alkyl glycol dibenzoate is taken as a crystallization inhibitor, so that the PET material has good transparency through the design of all the components; meanwhile, the PET material has good strength and rigidity and can well meet the high-performance requirements of the fields of low-temperature food packaging industry and the like on the PET material.

To provide an adhesive tape excellent in adhesion to an adherend, and excellent in color tone retention even when exposed to a high temperature and high humidity environment.SOLUTION: An adhesive tape includes an adhesive layer formed with an adhesive composition, wherein the adhesive composition contains a (meth)acrylic copolymer and a tackifier resin, the adhesive layer has a glass transition temperature of -10°C or higher and 20°C or lower, and an amount of change in b* measured in color difference measurement before and after heating is 2.00 or less when the adhesive tape is heated for 120 hours under an environment of 60°C, 90% RH.SELECTED DRAWING: None

The thermal transfer ribbon comprises a base material layer, a color layer and a back coating layer, the color layer is arranged on one side face of the base material layer, and the back coating layer is arranged on the other side face of the base material layer; the color layer comprises the following components: a methacrylic acid copolymer A, a methacrylic acid copolymer B, vinyl chloride-vinyl acetate resin, a pigment, wax and a first filler. The lamp box cloth printed by the thermal transfer ribbon for the lamp box cloth is uniform in hue, bright in color and fine and smooth in picture, and the surface of the lamp box is smooth, seamless and not prone to wrinkling. The thermal transfer ribbon structure is mainly composed of the back coating layer and the front color layer, pattern manufacturing can be achieved in a digital printing mode, film pasting is not needed, cost is low, and efficiency is high. By strictly controlling a pigment dispersion process and adding a specific filler or an auxiliary agent to carry out matte treatment on the thermal transfer ribbon, the thermal transfer ribbon has higher weather resistance and certain light transmission, and has the same display effect in the daytime and at night.

The invention relates to the field of laminated glass intermediate films, in particular to an ionic safe laminated glass intermediate film and a preparation method thereof. The middle membrane comprises the following components: ethylene methacrylic acid copolymer metal salt, a coupling agent, an initiator, trimethylolpropane trimethacrylate, a grafting monomer, a chain extender and a molecular weight regulator; the preparation method comprises the following steps: mixing ethylene methacrylic acid copolymer metal salt, an initiator and a grafting monomer in a high-speed mixer to obtain a first mixture; mixing the first mixture, a coupling agent, trimethylolpropane trimethacrylate, a chain extender and a molecular weight regulator in a high-speed mixer to obtain a second mixture; and inputting the second mixture into a screw extruder, and extruding to obtain the ionic safe laminated glass intermediate film. The ionic safe laminated glass intermediate film is low in raw material cost, high in tensile strength and suitable for laminated glass of facilities with high safety requirements.

The present application belongs to the field of pharmaceutical preparations, and provides a composition containing prednisolone, a preparation method thereof, and an application thereof, wherein the composition containing prednisolone comprises a matrix and prednisolone dispersed in the matrix; the matrix is ​​a copolymer of citric acid and methacrylic acid; the methacrylic acid copolymer is a methacrylic acid copolymer type A and a methacrylic acid copolymer type B. The composition of the present invention can be released at a specific point in the colon, greatly improving the effect of the drug in treating lesions in the colon.

The present application relates to the field of interlayer film of laminated glass, and particularly relates to an ionic safety interlayer film of laminated glass and a preparation method thereof. The components of the interlayer film include ethylene methacrylic acid copolymer metal salt, coupling agent, initiator, trimethylolpropane trimethacrylate, grafting monomer, chain extender and molecular weight regulator; the preparation method includes the following steps: mixing the ethylene methacrylic acid copolymer metal salt, initiator and grafting monomer in a high-speed mixer to obtain a first mixture; mixing the first mixture, coupling agent, trimethylolpropane trimethacrylate, chain extender and molecular weight regulator in a high-speed mixer to obtain a second mixture; and inputting the second mixture into a screw extruder to extrude the ionic safety interlayer film of laminated glass. The ionic safety interlayer film of laminated glass has low raw material cost and high tensile strength, and is suitable for laminated glass of high safety demand facilities.

The invention relates to a thickening (meth)acrylic copolymer prepared using a polyalkoxylated Guerbet alcohol comprising a doubly branched alkyl group. The method for preparing this copolymer and its use in aqueous compositions, particularly coating compositions, are also part of the invention.

The application provides a kind of adhesive film composition, encapsulation adhesive film and photovoltaic module. The adhesive film composition includes 100 parts of base resin, 1-10 parts of crosslinking agent and 0.01-5 parts of catalyst by weight fraction; wherein, the crosslinking agent is binary ester compound and / or polybasic ester compound, the catalyst is ester exchange reaction catalyst, and the base resin is selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer. Under certain stimulation (generally heating), the encapsulation adhesive film can be melted, which easily separates the parts of the photovoltaic module. Not only the encapsulation adhesive film can be recycled, but also the other parts of the photovoltaic module can be recycled without damage, improving the recycling efficiency. In addition, even if the encapsulation adhesive film has problems such as bubbles after lamination, it can be re-laminated through the principle of reversible crosslinking, thereby improving the yield of the product.

The invention discloses a polypropylene composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The polypropylene composition comprises the following components: polypropylene resin; a toughening agent; a nitrogen and phosphorus flame retardant; an ionic polymer; grafting POE (Polyolefin Elastomer) with maleic anhydride; the ionic polymer comprises ethylene / methacrylic acid copolymer sodium salt and ethylene / methacrylic acid copolymer zinc salt, and the mass ratio of the ethylene / methacrylic acid copolymer sodium salt to the ethylene / methacrylic acid copolymer zinc salt is 1: (0.3-4). The polypropylene composition provided by the invention has excellent low-temperature toughness and flame retardant property, and also has excellent scratch resistance.

Provided are: a (meth) acrylic copolymer which excellently absorbs laser light having a wavelength of 266 nm or 355 nm; a composition for forming an adhesive layer; a laminate; and a method for producing and processing an adhesive layer. A (meth) acrylic copolymer includes a structural unit derived from a polymerizable monometer containing an ultraviolet-absorbing moiety represented by general formula (6), and a structural unit different from the structural unit. [Chemical Formula 1]

The invention provides a carboxylic acid type ionic polymer and a preparation method and application thereof, and belongs to the technical field of ionic polymers, the preparation method comprises the following steps: (1) mixing an ethylene acrylic acid copolymer or an ethylene-methacrylic acid copolymer and a metal hydroxide aqueous solution, and introducing nitrogen for bubbling; and (2) carrying out nitrogen displacement, heating, reacting, cooling, adding a precipitant to generate a precipitate, and carrying out post-treatment to obtain the carboxylic acid type ionic polymer. The carboxylic acid type ionic polymer prepared by the preparation method provided by the invention is mild in reaction condition and easy to realize; water is used as a solvent, a byproduct is water, and the reaction process and results are harmless and environment-friendly; the essence of the preparation method is acid-base neutralization reaction, the atom utilization rate is high, and the processing cost is reduced; the method can be used for preparing various carboxylic acid type ionic polymers.

A separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator, the separator including a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a heat resistant binder including a (meth)acryl copolymer including a first structural unit and a second structural unit, the first structural unit being a structural unit of a (meth)acrylamide and the second structural unit being a structural unit of a (meth)acrylic acid, a (meth)acrylate, a (meth)acrylonitrile, a (meth)acrylamido sulfonic acid, a (meth)acrylamido sulfonate salt, or a combination thereof; polyethylene particles; and first inorganic particles, and an average particle size (D50) of the first inorganic particles is larger than an average particle size (D50) of the polyethylene particles.

The invention relates to the technical field of capsule preparations, in particular to a medicinal capsule structure, which comprises a mother capsule and a sub-capsule filled in the mother capsule, and two working modes are realized through filling switching of the mother capsule: under the mode A (time sequence release), the mother capsule is filled with a quick-release medicine and the sub-capsule filled with a slow-release medicine at the same time, and under the mode B (time sequence release), the sub-capsule is filled with a slow-release medicine; multi-component off-peak release is realized by utilizing the quick release characteristic of the mother capsule and the slow release characteristic of the ascomycetes; and in the mode B (split swallowing), the mother capsule is only filled with the ascoid to adapt to people with dysphagia, and the ascoid can be taken in a mixed manner after the mother capsule is split, and the function of a medicine coating is reserved. The ascus is composed of a medicine containing cavity, a targeting layer and an anchoring layer, the targeting layer can be made of an arabinoxylan-chitosan compound (colon targeting) or a methacrylic acid copolymer (esophageal targeting), the anchoring layer is made of a hyaluronic acid-chitosan compound, and it is ensured that the ascus is anchored at the focus position. The preparation has multiple functions of sequential release, targeted drug delivery, adaptation to people with dysphagia and the like.

A hard capsule composed of a hard capsule membrane, the hard capsule membrane can be formed by the coacervation method and has enteric properties. This problem is solved by an enteric hard capsule, which includes: a film (a) containing a first component and a second component, or a film (b) containing a first component, a second component, and at least one component selected from a third component and a fourth component. The first component is methylcellulose and / or hydroxypropylmethylcellulose with a viscosity value of 6 mPa·s or more, the second component is an enteric methacrylic acid copolymer, the third component is a water-insoluble (meth)acrylic acid alkyl ester copolymer and / or ethylcellulose, and the fourth component is at least one selected from plasticizers and surfactants acceptable in pharmacy or as food additives. Based on the total mass of the first component, the second component, the third component, and the fourth component contained in the film being 100%, the content ratio of the first component is 30 to 70% by mass, the content ratio of the second component is 30 to 60% by mass, and the sum of the ratios of the first component and the second component is 70% by mass or more.

A resin composition may contain: a (meth)acrylic copolymer containing a structural unit (A) based on a specific metal atom-containing polymerizable monomer (a) and a structural unit (B) based on a specific polysiloxane block-containing polymerizable monomer (b); and an organic solvent, wherein a content of the structural unit (A) is from 5 to 35 mass %, a content of the structural unit (B) is from 35 to 75 mass %, and a content of the structural unit based on a (meth)acrylic macromonomer is less than 13 mass % relative to a total mass of all structural units constituting the (meth)acrylic copolymer, a weight-average molecular weight of the (meth)acrylic copolymer is 2000 or more and 6500 or less, and a VOC content is 500 g / L or less.

The composition comprises a polyolefin dispersion of one or more polyolefins having a melting point of 80°C to 130°C and an average particle size of 0.5 microns to 5 microns, and a repair dispersion containing ethylene methacrylic acid copolymer ("EMAA") having a melting point of 80°C to 120°C and an average particle size of 0.1 microns to 1 micron, wherein the EMAA copolymer is neutralized to 0% to 40%, and furthermore, the weight ratio of EMAA to polyolefin in the composition is 1:100 to 10:100.

The application relates to the field of plastic concrete, and particularly discloses a preparation method of plastic concrete using machine-made sand grading, which comprises the following steps: screening construction waste to obtain sand I, sand II and sand III with particle sizes >0.5 mm, 0.5-0.2 mm and <=0.2 mm; uniformly mixing sand I, a coupling agent and an emulsion, drying the mixture to obtain machine-made sand I; uniformly stirring sand II and a polyvinyl alcohol solution, adding an epoxy-based silicate, and heating to obtain machine-made sand II; uniformly mixing sand III, a calcium acetate solution and a polysulfonate resin, kneading the mixture, and then performing roasting activation to obtain machine-made sand III; uniformly mixing cement, water, machine-made sand I, machine-made sand II, machine-made sand III, gravel, an acrylic-methyl acrylic copolymer, a blending powder and an additive. The application forms grading machine-made sand through a specific modification method, and can significantly improve the elastic modulus and impermeability of the plastic concrete.

Provided is a polyfunctional onium salt initiator having the following general formula (I): 'R (-L) n' '(MR'x) bHc' (I) wherein n = b + c; r (-L) n is an n-valent anionic group derived from (A) a nitrogen-free aliphatic or aromatic organic polycarboxylic acid, (B) a polyphenol, (C) a polyacrylic acid, an acrylic acid-methacrylic acid copolymer, or a polymaleic acid, (D) a hydroxyaromatic carboxylic acid, or (E) a nitrogen-containing aliphatic or aromatic organic polycarboxylic acid; -L is-COO <-> or-O <->; mR'x is an ammonium ion, sulfonium ion or phosphonium ion and H is a hydrogen ion (H +); r'is a C1-C30 hydrocarbyl group, x is 3 or 4, M is N, P or S; n is an integer from 2 to 30; b is an integer from 1 to 29, and c is an integer from 1 to 15. The incompletely onium salinized or incompletely salified initiator has high reaction activity and can be used for preparing carbon dioxide-based multi-arm polycarbonate with narrow molecular weight distribution, and the molecular weight is between hundreds of thousands and millions.

An adhesive protective film, an optical member including the adhesive protective film, and an optical display apparatus including the optical member. The adhesive protective film includes a cured product of a composition including a (meth)acrylic copolymer, a curing agent, an aromatic group-containing mono- or higher functional monomer, and a photoinitiator. The adhesive protective film has an initial peel strength of 7 gf / inch or less relative to a polyimide ash-containing surface configured to be attached thereto, and a peel strength of 200 gf / inch or more relative to the polyimide ash-containing surface upon light irradiation.

A repulpable release liner and a composite composition for preparing the same are disclosed. The composite composition includes (A) a first formulation containing a vinyl-functionalized polysiloxane, a non-vinyl polysiloxane, and a noble metal-siloxane complex catalyst, and (B) a second formulation containing at least one olefin copolymer and at least one olefin-(meth)acrylic copolymer. The first formulation is independent of the second formulation. The release liner prepared using the composite composition exhibits excellent repulpability, abrasion resistance, coatability of a release coating having a desired release force, and the like.

An optical member and an optical display apparatus are disclosed. An optical member includes an adhesive layer and a base film stacked on a surface of the adhesive layer, and the adhesive layer includes a cured product of a composition including a UV absorbent and a (meth)acrylic copolymer, and the optical member has a light transmittance variation ΔT of 0%, as calculated according to Equation 1, and a color value variation Δb* of less than 0.4, as calculated according to Equation 2.

To provide an adhesive tape excellent in adhesion reliability, and transmission visibility when exposed to a high temperature and high humidity environment after bonding adherends together.SOLUTION: An adhesive tape includes an adhesive layer formed with an adhesive composition, wherein the adhesive composition contains a (meth)acrylic copolymer and a tackifier resin, the adhesive tape has a visible light transmittance of 50% or more, and a floating height between an aluminum plate and a polycarbonate resin plate is 10 mm or less when a repulsion resistance test is performed, in which a laminate obtained by bonding an aluminum plate having a width of 25 mm, a length of 150 mm, and a thickness of 0.3 mm and a polycarbonate resin plate having a width of 25 mm, a length of 200 mm, and a thickness of 1 mm via the adhesive tape having a width of 25 mm and a length of 150 mm disposed at a central portion in a lengthwise direction of the polycarbonate resin plate is deformed into an arc shape such that a distance between both ends in the lengthwise direction of the polycarbonate resin plate becomes 180 mm by applying bending stress in the lengthwise direction of the laminate, and thereafter heated for 72 hours under an environment of 60°C and 90% RH.SELECTED DRAWING: None

A sealing resin composition which comprises a curable resin component, a (meth)acrylic copolymer, and a filler, wherein the (meth)acrylic copolymer comprises a first polymer chain that includes a constituent unit derived from methyl methacrylate and a second polymer chain that includes a constituent unit derived from n-butyl acrylate.