243 results about "Poly methacrylate" patented technology

The invention discloses an electrolyte with a temperature switch function and a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The electrolyte provided by the invention comprises the following components: lithium salt, a first organic solvent and a polymer, the lithium salt is at least one of lithium bis (trifluoromethylsulfonyl) imide, lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium tetrafluoroborate, lithium difluoro (oxalato) borate and lithium bis (oxalato) borate; the polymer is polymethacrylate, and the first organic solvent is [Cnmim] [TFSI]. According to the electrolyte, the reversible phase transformation process is realized, the electrode reaction can be closed at high temperature, and the lithium battery is prevented from being out of control due to overheating; and when the temperature is reduced to normal temperature, the battery can work normally. The phase transition temperature of the electrolyte is flexible and controllable, and the phase transition temperature can be regulated and controlled to a reasonable interval by optimizing the composition of the electrolyte and the dosage (concentration) of each component, that is, the phase transition temperature is higher than the normal working temperature of the battery and lower than the initial temperature of the heat release side reaction.

The present invention discloses a method for separating and purifying recombinant human collagen, wherein the method first filters the recombinant human collagen fermentation broth, then uses cationic composite chromatography to crudely purify the recombinant human collagen to obtain a cationic composite chromatography eluent, and then uses a hydrophobic chromatography column to purify the purified recombinant human collagen, wherein the cationic composite chromatography column is filled with a high-flow rate agarose matrix containing a hydrophobic group of a phenyl group and an electrostatic group of a carboxyl group as a filler, and the hydrophobic chromatography column is filled with a hydrophilic polymethacrylate matrix containing a phenyl group as a filler. The final target protein purity of the present invention is greater than 99%, the recovery rate is greater than 85%, and the endotoxin content is less than 0.5EU / mg. The process of the present invention is simple and easy to operate, and the purification cost requirement is low. The recombinant human collagen obtained by the method has high purity and low endotoxin content, and meets the requirements of cosmetic raw materials, medical devices, and medical-grade high-purity collagen.

The invention discloses a method for preparing a functionalized polymer based on a macro-micro reactor chemical-enzyme method, which comprises the following steps: reacting a mixed solution of an acrylate monomer, an initiator, a ligand, a functional alcohol and a solvent in a micro reactor to obtain a reaction solution containing functionalized polyacrylate, and the micro reactor comprises the macro-micro reactor containing a copper internal member. In a macro-micro reactor, enzymatic ester exchange and Cu (0)-RDRP coupling reaction are carried out to obtain poly (methyl) acrylate with a series of chemical structures and copolymers of the poly (methyl) acrylate. The method is wide in applicable substrate range, and compared with a traditional synthesis method, the macro-micro reactor containing the internal component can remarkably shorten the polymerization time, secondary purification of the monomer is avoided, and the conversion rate is greatly increased. The characteristic scale of the macro-micro reactor reaches centimeter level, and high-flux synthesis can be realized. The invention provides a technical scheme for the preparation of the functionalized poly (methyl) acrylate polymer, and has an industrial conversion prospect.

The invention relates to the technical field of lubricating oil, and discloses a low-temperature-resistant lubricating oil composition and a preparation method thereof. Mineral oil, modified polymethacrylate, a dispersing agent, an antioxidant and an oil defoaming agent are stirred and mixed and then filtered, and the low-temperature-resistant lubricating oil composition is obtained. The cross-linking agent enables polymethacrylate to form a light cross-linked structure, and stress can be dispersed during shearing; nitrogen atoms in triazinyl, pyridyl, pyrrolidone and Mannich base structures serve as hydrogen bond receptors, the hydrogen bond interaction with hydroxyl on a polymethacrylate molecular chain is enhanced, a physical cross-linked network is formed, and the shear resistance is further improved; in the modified low-temperature-resistant monomer, the glass-transition temperature can be remarkably reduced by high flexibility of silicon oxygen bonds in long straight-chain alkyl and silane groups, so that a molecular chain can still move at a low temperature, and the low-temperature fluidity of the lubricating oil is improved; the cyclic structure of cyclohexyl can effectively interfere with the ordered arrangement of wax crystals, reduce the pour point of the lubricating oil and improve the low-temperature fluidity.

The invention discloses a drag reduction composition, a preparation method thereof and a pipeline drag reducer. The drag reduction composition comprises the following components in parts by mass: 10-21 parts of a polymethacrylate compound, 6-18 parts of a dispersing agent and 2-9 parts of a lubricating agent, the lubricant is prepared from one or more of glycerol triacetate, glycerol tripropionate, pentaerythritol tetraacetate and dipentaerythritol hexaacetate. The drag reduction composition provided by the invention comprises the polymethacrylate compound matched with the dispersing agent and the specific lubricant, and the components jointly form a suspension system with stable properties, so that the degree of freedom of motion among polymer molecules can be increased, and the occurrence of an agglomeration phenomenon is reduced. When the drag reduction composition is added into a pipeline containing crude oil or product oil, polymer molecules can be stretched, folding and curling phenomena of the polymer molecules can be reduced, and a good drag reduction effect can be quickly achieved.

The invention discloses paint-spraying-free lamp plastic with a metal effect and a preparation method of the paint-spraying-free lamp plastic. The lamp plastic is prepared from the following raw materials in parts by weight: 80 to 90 parts of modified polymethacrylate, 3 to 5 parts of modifier, 1.5 to 2.5 parts of aluminum powder, 0.02 to 0.05 part of carbon black, 0.1 to 0.3 part of antioxidant and 0.2 to 0.3 part of dispersing agent, molecules of the lamp plastic contain chelated rings formed by hindered amine and intramolecular hydrogen bonds, after the chelated rings are irradiated by ultraviolet light, light energy is converted into heat energy to be released, hindered phenol can capture free radicals, then the aging rate of the lamp plastic is reduced, dynamic crosslinking can be generated when a modifier and modified polymethacrylate are subjected to melt extrusion, and the service life of the lamp plastic is prolonged. And meanwhile, the modifier molecules contain organic silicon chain segments, so that the heat aging resistance of the plastic can be further improved, and the plastic is not easy to crack under the action of external force, so that the service life of a lamp is prolonged.

The invention discloses a wax remover and a preparation method thereof, and belongs to the technical field of oilfield exploitation. The components of the wax remover include heavy aromatic hydrocarbons, limonene, polymethacrylate, fatty alcohol polyoxyethylene ether, modified methyl cellulose and modified EVA; during preparation, the formula amount of limonene, polymethacrylate, fatty alcohol polyoxyethylene ether, modified methyl cellulose and modified EVA are added to the heavy aromatic hydrocarbons, the mixture is heated to 60-70°C, and stirred for 3-5h. The components in the wax remover of the present invention work synergistically, which can not only effectively peel off the wax layer on the metal surface, but also improve the dissolution rate of the wax, and the wax can be stably dispersed in the system after being dissolved, and will not solidify and aggregate again, which can effectively avoid the regeneration of wax blocks.

The invention provides an immobilized enzyme as well as a preparation method and application thereof. The immobilized enzyme comprises an enzyme and a carrier for loading the enzyme, wherein the enzyme is alpha-amino acid fatty acyl transferase or polypeptide ligase; the carrier is a polymethacrylate matrix carrier; the polymethacrylate matrix carrier comprises an amino carrier or an epoxy carrier; wherein the amino carrier is an amino carrier modified by a long-chain polymer; the epoxy carrier is an epoxy carrier modified by a long-chain polymer; wherein the long-chain polymer comprises polyethylene glycol (Mw) of 2-8 KDa, polyvinyl alcohol (Mw) of 1.7-31 KDa, polyethyleneimine (Mw) of 1.8-70 KDa, polyacrylamide (Mw) of 50-300 KDa or polylysine (Mw) of 1.6-41 KDa. The immobilized enzyme disclosed by the invention is good in intermolecular dispersity and relatively large in spacing, can efficiently catalyze a substrate to synthesize oligopeptide or polypeptide, and has relatively high substrate conversion rate.

The invention discloses a phosphorus-containing polymethacrylate viscosity index improver as well as a preparation method and application thereof, and belongs to the technical field of lubrication. The viscosity index improver is prepared by the following method: dissolving dodecyl methacrylate and 2-methyl-2-hydroxyethyl acrylate phosphate ester in 2-methyltetrahydrofuran, and then dissolving the dodecyl methacrylate and the 2-methyl-2-hydroxyethyl acrylate phosphate ester in 2-methyltetrahydrofuran; adding azodiisobutyronitrile and dodecyl mercaptan, and purifying the solution with nitrogen; then carrying out polymerization reaction, and introducing air into the reaction system to cool and terminate the reaction; and placing the reaction product in methanol for precipitation so as to achieve the purpose of purification, and finally drying the obtained product so as to obtain the viscosity index improver. The improver can significantly improve the viscosity index of the lubricating oil, improve the low-temperature performance and high-temperature viscosity retention performance of the lubricating oil, and also can well improve the friction reduction and wear resistance of the lubricating oil, so that the improver shows good application prospects and use values in the field of lubrication.

A curable adhesive is provided. The curable adhesive comprises a poly(meth)acrylate or (meth)acrylate-containing polyurethane; one or more (meth)acrylate monomers and / or (meth)acrylate-containing oligomers; a free radical initiator; and polyvinylpyrrolidone or copolymer thereof. The inclusion of polyvinylpyrrolidone and certain reactive oligomers can enable both high adhesive modulus and excellent mechanical performance to be achieved. Optical films coupled to the provided adhesive can also resist undesirable changes in flatness during assembly.

The invention discloses a battery separator filling conditioner and a preparation method thereof. The main components of the battery separator filling conditioner include a base oil composition, a pour point depressant, and an antioxidant. The base oil composition includes a paraffin-based neutral oil and a cycloalkyl neutral oil. The components of the battery separator filling conditioner are calculated by weight as follows: 98-100 parts of the base oil composition, 0.5-1.0 parts of polymethacrylate (PMA), and 1-2 parts of the antioxidant. The components of the base oil composition are calculated by weight as follows: 80-90 parts of the paraffin-based neutral oil and 10-20 parts of the cycloalkyl neutral oil, and the total number of the paraffin-based neutral oil and the cycloalkyl neutral oil is 98-100 parts. The filling conditioner prepared by the invention has a light appearance color, moderate viscosity, a low pour point, a high flash point, low volatilization loss, and an extremely low sulfur content. It also has good antioxidant performance and suitable solubility, and has good material compatibility.

To provide an apparatus for regenerating a poly(meth)acrylic acid ester, with which water can be efficiently removed when a poly(meth)acrylic acid ester is regenerated; a method for regenerating a poly(meth)acrylic acid ester; and a method for producing a (meth)acrylic acid ester.SOLUTION: An apparatus 100 for regenerating a poly(meth)acrylic acid ester includes: a pyrolysis unit 10 that performs pyrolysis of a poly(meth)acrylic acid ester to obtain a gaseous pyrolysis product; a first cooling unit 20 that cools the gaseous pyrolysis product to obtain a liquid pyrolysis product; a refining unit 30 that performs refining of the liquid pyrolysis product to obtain a gaseous refined product; a second cooling unit 40 that cools the gaseous refined product to obtain a liquid refined product; and a dehydration unit 50 that removes water contained in at least one of the liquid pyrolysis product and the liquid refined product.SELECTED DRAWING: Figure 1

The present technology includes the use of a pour point depressant to improve low temperature viscosity in an industrial gear lubricating composition containing a Group IV base oil. The technology provides an industrial gear lubricating composition comprising a Group IV base oil, a sulfurized olefin, a phosphorus-containing agents, and a poly(meth)acylate polymer pour point depressant.

Adhesive articles capable of forming encapsulation layers include a base layer that is optically clear and thermally stable for 1000 hours at a temperature of 130°C and a layer of a curable adhesive disposed on the base layer. The curable adhesive layer includes a poly(meth)acrylate-based matrix containing acid functional groups and epoxy functional groups such that upon heating to a temperature of 100°C to 150°C for 1 hour to 2 hours, the curable adhesive layer crosslinks to form an optically clear encapsulation layer. Methods of using these adhesive articles include disposing the adhesive article on a major surface of an optical article and curing the adhesive layer to form an encapsulated optical article.

To provide a photocurable composition containing biomass material and forming a cured film that is resistant to scratches.SOLUTION: A photocurable composition comprises epoxidized vegetable oil (meth)acrylate (A1), glycerol poly(meth)acrylate or a derivative thereof (A2), and a photopolymerization initiator (B).SELECTED DRAWING: None

The invention relates to the field of lubrication of ball screws, in particular to long-life creep-resistant lubricating grease for a high-precision ball screw, which comprises the following components in parts by weight: 65 parts of polyolefin, 5-10 parts of pentaerythritol ester, 5-10 parts of isocyanate, 2-5 parts of amine chain extender, 5 parts of PTFE (polytetrafluoroethylene), 1.0-1.5 parts of diphenylamine, 0.1-0.5 part of 2, 4-diphenyl-1, 3-pentanediol monoisobutyrate, 0.1-0.5 part of antioxidant, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant. The composite material is prepared from the following components in parts by weight: 0.5 to 1 part of 2, 6-butylated hydroxytoluene, 1.5 to 2 parts of molybdenum isocaprylate, 0.5 to 1 part of molybdenum bis (2-ethylhexyl) dithiocarbamate, 1 to 2 parts of zinc dialkyl dithiophosphate, 3 parts of calcium petroleum sulfonate, 1 to 1.5 parts of polyisobutene, 0.2 to 0.5 part of benzotriazole and 0.1 to 0.3 part of polymethacrylate. The isocyanate comprises HDI and IPDI, and the amine chain extender comprises TETA and TEPA. According to the invention, isocyanate and the amine chain extender react to form a polyurea macromolecular chain, and a high-energy hydrogen bond network is formed, so that the lubricating grease has relatively high creep resistance; the anti-creep performance is further enhanced through cooperation with the PTFE particles; meanwhile, through cooperation with diphenylamine, the oxidation resistance is promoted, the consumption is reduced, and the service life of the lubricating grease is longer.

The purpose of the invention is both to suppress viscous resistance loss at compressor start (normal temperature) and improve oil film load performance during operation (high temperature) in a refrigerating machine oil and a refrigerating device. A refrigerating machine oil according to the present disclosure is for a refrigerating device in which propane is sealed therein as a refrigerant, said refrigerating machine oil containing an ester-based oil having a viscosity grade of ISO VG32 or less, and a viscosity index improver containing a polymethacrylic acid ester having a C1-18 alkyl substituent, the concentration of the polymethacrylic acid ester being from 0.6 to 6 wt%.

The invention relates to the technical field of industrial gear lubricating oil, in particular to an industrial gear oil composition. The composition comprises the following components in percentage by weight: 10%-30% of rerefined base oil, 5%-40% of synthetic ester or bio-ester base oil, 20%-70% of second-class mineral base oil, 1.0%-5.0% of an anti-wear composite additive and 5.0%-10.0% of a viscosity index improver, wherein the synthetic ester or bio-ester base oil is selected from one or more of diisononanoic acid ester, trimethylolpropane ester, pentaerythritol ester or rapeseed oil ester; the anti-wear composite additive comprises 5.0%-9.9% of trialkyl phosphate, 1.0%-4.9% of alkyl borate or alkyl boric acid polyether, 1.0%-4.9% of alkenyl amine and the balance of mineral oil; the viscosity index improver is a star type or comb type polymethacrylate polymer.

The application belongs to the technical field of shock absorber oil, and particularly relates to a silicon-based shock absorber oil for racing cars and a preparation method thereof. The silicon-based shock absorber oil for racing cars comprises, by mass percentage, 50-60 parts of silicone oil, 40-50 parts of base oil, 3-6 parts of a viscosity index improver, 0.2-0.5 parts of an extreme pressure anti-wear agent, 0.2-0.5 parts of a pour point depressant, and 0.2-0.5 parts of an antioxidant. The extreme pressure anti-wear agent comprises thiazolyl disulfide dimers and poly-methyl acrylate modified nanoscale spherical boron nitride. The silicon-based shock absorber oil for racing cars has excellent viscosity-temperature performance, shear stability, heat resistance, wear resistance, corrosion resistance and high-temperature foam resistance.

The application provides a plate transfer film and a preparation method and application thereof, and relates to the technical field of plate transfer film preparation. The plate transfer film comprises, from top to bottom, an upper surface layer, a core layer and a lower surface layer; the upper surface layer comprises the following components in a mass ratio: 89-91 parts of polypropylene, 1.1-6.3 parts of an antistatic agent and 0.2-0.5 parts of a slip agent; the core layer comprises the following components in a mass ratio: 40-70 parts of high-density polyethylene, 2-15 parts of a matting agent, 1-3 parts of a dispersing agent and 0.1-1.0 parts of an antioxidant; and the lower surface layer comprises the following components in a mass ratio: 95-97 parts of polypropylene and 3.0-5.0 parts of polymethyl acrylate. The plate transfer film is attached to a PETG plate at 175-185 DEG C to prepare a PETG plate, and the gloss value of the PETG plate is 35-42 %.

The invention belongs to the technical field of photoresist, and particularly relates to a triazinyl negative photoresist composition for an organic insulating film, which comprises the following components in parts by mass: 30-100 parts of a polymer containing a triazine structure; 5-65 parts of an unsaturated compound containing an olefinic bond; 0.005 to 10 parts of a surface active agent; 0.005 to 10 parts of an adhesion promoter; 0.005 to 30 parts of a free radical polymerization initiator; and 100 to 2000 parts of a solvent. According to the invention, a polyfunctional group triazine derivative participates in a free radical addition reaction, a poly (methyl) acrylate polymer containing a triazine structure is synthesized, and by regulating and controlling the type and number of functional groups of monomers participating in the reaction and the alkyl chain length and introducing aryl or naphthenic base, the polyfunctional group-containing poly (methyl) acrylate polymer is obtained. The hydrophilic-hydrophobic property, the temperature resistance and the chemical resistance of the polymer can be accurately adjusted.

Provided is a light-curable composition that includes one or more monofunctional (meth)acrylate monomers with at least one monomer having a homopolymer glass transition temperature of from 0°C to 200°C; a crosslinker selected from multifunctional oligomeric (meth)acrylates, aliphatic urethane (meth)acrylates, aromatic urethane (meth)acrylates, polyester (meth)acrylates, and epoxy (meth)acrylates; one or more adhesion promoters selected from glycidyl (meth)acrylate, 2-hydroxyethyl(meth)acrylate acid phosphate, phosphonate ester-containing (meth)acrylic monomer, phosphate ester-containing (meth)acrylic monomer, silane, and (meth)acrylic acid; a photoinitiator; a flame retardant; and one or more fillers comprising hollow fillers, refractory fillers comprising kaolin, intumescent fillers, or mixtures thereof. The cured composition can function as an electrical insulator in battery assemblies, while protecting components from hot particles and gases in case of thermal runaway events.

The present invention proposes a thickened hydraulic oil composition comprising the following components, by weight: 5-8% viscosity index improver, 0.5-3% extreme pressure antiwear agent, 0.1-3% antioxidant, 0.05-0.3% rust inhibitor, 0.01-0.1% passivator, 0.001-0.03% antifoaming agent, with the balance being base oil. This thickened hydraulic oil composition, obtained by combining a polymethacrylate viscosity index improver with an extreme pressure antiwear agent, exhibits excellent viscosity-temperature performance and low-temperature starting performance, as well as superior extreme pressure and antiwear properties, ensuring smooth equipment operation.

The present invention relates to poly(meth)acrylates which are produced by a substance polymerization using a first polymerization regulator and a second polymerization regulator. The invention further relates to an adhesive compound and the method for producing the poly(meth)acrylate adhesive compound.

The invention relates to a (non) biomass-sourced (methyl) acrylate (co) polymerization reaction method under the synergistic regulation of a hydrogen bond-free S negative nucleophilic center-containing thiourea anion initiator and organic aluminum lewis acid, and belongs to the technical field of polymer synthesis. Biomass-sourced and non-biomass-sourced (methyl) acrylate monomers are used as raw materials, and conjugated addition polymerization is carried out under the action of a bimolecular concerted catalysis system in which organic aluminum lewis acid participates in monomer activation, the molar ratio of the biomass-sourced or non-biomass-sourced (methyl) acrylate compound to the organic aluminum lewis acid to the thiourea anion is (1-800): (0.20-0.50): (0.10-0.25), the reaction is performed for 0.05-1440 minutes under the condition that the polymerization temperature is-60-90 DEG C, and the poly (methyl) acrylate homopolymer or copolymer is obtained. Syndiotactic copolymerization among monomers and block copolymerization among monomers with different polarities can be realized. The polymerization process provided by the invention can realize the polymerization of biomass-sourced and non-biomass-sourced (methyl) acrylics, the raw materials are cheap, the operation is convenient, and the reaction time is short, so that the low-cost and large-scale industrial production is realized; moreover, polymers with different properties can be prepared by virtue of rich monomer adaptability, and a research basis is provided for subsequent recovery and cyclic utilization of the polymers.

The present invention belongs to the technical field of coatings, and particularly relates to a one-coat material for engine bottom and its preparation method. The coating material uses polyaspartate resin, introduces a rigid polysulfone chain segment to restrict the excessive movement of the flexible chain segment of the resin and improve the crosslinking density of the polymer, thereby enhancing the intermolecular force, improving the efficiency of molecular chain transfer and dissipation of energy, and further improving the impact resistance of the material; introduces a hydrophobic polymethacrylate chain segment to endow the coating with good water resistance; fills with nano titanium diboride to improve the wear resistance and corrosion resistance of the coating. The coating prepared by the present invention is a low-VOC one-coat material, which not only has good adhesion of the primer and can firmly adhere to the surface of the substrate, but also has the properties such as water resistance and corrosion resistance of the topcoat; at the same time, it reduces the emission of VOCs, helps to reduce air pollution, and meets the requirements of environmental protection policies.

The invention relates to the technical field of biological materials, and discloses a bacterial activity protective coating as well as a preparation method and application thereof. The bacterial activity protective coating is prepared from a methacrylic acid copolymer, a 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide compound and N-hydroxysuccinimide, and the bacterial activity protective coating is prepared from the methacrylic acid copolymer, the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide compound and the N-hydroxysuccinimide. According to the preparation method, carboxyl of polymethacrylate is activated through crosslinking of EDC and NHS, covalent linkage is formed with amino on cell walls of probiotics, and a stable and compact pH-responsive protective coating is constructed on the surfaces of bacteria. The coating is insoluble in a gastric acid environment, and can effectively protect probiotics from being damaged by harmful factors such as gastric acid; and the probiotics are released to play a role when the probiotics are dissolved in an intestinal weakly alkaline environment. The survival rate and functionality of the probiotics in gastrointestinal tracts are remarkably improved, and the probiotics have good biocompatibility and have no inhibition effect on growth and proliferation of the probiotics.

Provided is a release coating agent for a polyester base material, which has excellent adhesion to the polyester base material and has heat peeling resistance. A release coating agent for a polyester substrate according to an embodiment includes an aqueous dispersion in which a polyurethane resin is dispersed in an aqueous dispersion medium. The aqueous dispersion contains a (meth) acrylic polymer that contains, as constituent components, a monofunctional alkyl (meth) acrylate having an alkyl group having 4-22 carbon atoms and a poly (meth) acrylate having 2-6 functional groups.

A system for preparing block copolymers comprising a polyolefin block and a polar polymer block by a continuous droplet flow method is disclosed. The continuous droplet flow method combines coordination-insertion polymerization of a gaseous olefin monomer that is dissolved in droplets of a solvent using a diamine coordinated Pd(II) catalyst complex with Metal-organic Insertion Light-initiated Radical polymerization of a polar monomer, such as an acrylate or (meth)acrylate, using the same catalyst and an auxiliary complexing ligand. Polyolefin-polar block copolymers prepared using the disclosed method can be a diblock copolymer comprising a polyolefin block and a polar polymer block, (e.g. a polyethylene-polyacrylate or a polyethylene-poly(meth) acrylate diblock copolymer), or a triblock copolymer (e.g. a polyacrylate-polyethylene-polyacrylate or a poly(meth)acrylate-polyethylene-poly(meth)acrylate copolymer).

The object of the present invention is to provide a resin composition capable of obtaining an insulating layer having excellent thermal conductivity and peel strength to a metal layer, a resin sheet using the resin composition, a circuit board, and a semiconductor chip package. The solution of the present invention is a resin composition comprising: (A) a polymer compound having one or more structures selected from the group consisting of a polybutadiene structure, a polysiloxane structure, a poly(meth)acrylate structure, a polyalkylene structure, a polyalkyleneoxy structure, a polyisoprene structure, a polyisobutylene structure, and a polycarbonate structure in a molecule, (B) an epoxy resin, (C) a thermally conductive filler, and (D) an active ester curing agent.