41 results about "Dimethylitaconate" patented technology

The invention discloses a high-temperature resistance lithium ion secondary battery adhesive and a preparation method thereof. The preparation method adopts 2-acrylamide-2- methylsulfonate, itaconate, dimethyl itaconate, maleic anhydride, and fumarate as the initial monomer, and carboxymethyl cellulose salt as the auxiliary agent. The reactants polymerize under the inducing of persulfate thermal free radical initiator, so as to produce homogeneous and stable electrode adhesive. The electrode adhesive prepared according to the preparation method has the advantage of high-temperature resistance, and is suitable for being applied to high power-density and high energy-density lithium ion battery.

The invention relates to a practical synthesis method of 3-benzyl-3-aza-bicyclo[2,1,0]hexane. The method comprises the following synthesis processes of: condensing dimethyl itaconate, serving as a raw material, with benzylamine to obtain ester, and reducing to obtain alcohol; reacting the ester with methanesulfonyl chloride to generate methanesulfonyl ester; reacting the methanesulfonyl ester with lithium hexamethyl disilazide to obtain corresponding 3-benzyl-3-aza-bicyclo[2,1,0]hexane-2-one; and reducing by lithium aluminum hydride to obtain the 3-benzyl-3-aza-bicyclo[2,1,0]hexane. Due to the adoption of the method, the defects of low yield, complexity in operation, difficulty in post-treatment and amplification and the like in the conventional document process are overcome. The practical synthesis method of the 3-benzyl-3-aza-bicyclo[2,1,0]hexane provided by the invention has the advantages of simple synthesis route, reasonable process selection, low cost of the raw material, easiness in obtaining of the raw material, convenience for operation and post-treatment, high total yield, easiness in amplification, and application to large-scale production. In the method, the dimethyl itaconate serves as the raw material.

The invention provides a flame-retardant low-warpage glass fiber reinforced polypropylene composite material and a preparation method thereof. The flame-retardant low-warpage glass fiber reinforced polypropylene composite material comprises the following components: polypropylene resin, alkali-free glass fiber, organic coated modified silicon carbide powder, four-needle nanometer zinc oxide whiskers, a halogen-free flame retardant, dimethyl itaconate, a titanate coupling agent, a toughening agent, a heat stabilizer, an antioxidant and a lubricant. The preparation method comprises the followingsteps: adding polypropylene resin, alkali-free glass fiber accounting for 30-40% of the total mass, the titanate coupling agent, the halogen-free flame retardant, the toughening agent, the heat stabilizer, the antioxidant and the lubricant into a twin-screw extruder from a main feed port, adding the organic coated modified silicon carbide powder, dimethyl itaconate and the remaining alkali-free glass fiber into the twin-screw extruder from a side feed port, and performing melt extrusion and granulation, wherein the extrusion temperature is 205-245 DEG C. The composite material not only has relatively good low warpage and friction resistance, but also has very good flame retardant properties.

The invention provides a construction method of a double-disease model mouse. Dimethyl itaconate is dissolved in double distilled water, the concentration is 1.5 mM, the mouse is fed, new water is replaced every two days, and the feeding time is 15-20 days; and during the period of spontaneous type 1 diabetes mellitus, intensive water drinking is carried out once a week, the time is 2 days, and the double-disease model mouse is finally obtained. By means of the model, the injury of a motion function of the model can be easily detected, the injury includes motion retardation, muscular stiffness, static tremor and other main symptoms of PD, the success rate is high, and the model stabilization time is long.

The invention discloses a halogen-free flame-retardant macromolecular damping spring which is prepared by mixing dimethyl terephthalate, 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide-dimethyl itaconate, 1,4-butanediol, polytetrahydrofuran, a catalyst and an antioxidant; adding all the components into a polymerization kettle according to a certain ratio; carrying out transesterification and condensation polymerization reaction to obtain a polyether-co-ester elastomer, wherein the polyether-co-ester elastomer has the hardness of D50-D60, and the polyether-co-ester elastomer is proven to have number-average molecular weight of 29000-32000 through GPC tests realized by using a trichloromethane solvent; and carrying out injection molding on the polyether-co-ester elastomer to obtain the macromolecular damping spring with structure and elastomer material bearing and rebounding effects. The halogen-free flame-retardant macromolecular damping spring has the advantages that the production process is simple, the production efficiency is high, the product percent of pass is relatively high, and the halogen-free and flame-retardant requirements are met, so that the halogen-free flame-retardant macromolecular damping spring can be widely used as a buffering device in the fields of vehicles, engineering machines, elevators and the like.

The invention discloses a heat sink material for semiconductors, which comprises a substrate and a wrapping layer. The substrate is made of the following raw materials: graphite, aluminum oxide, aluminum nitride, silicon nitride, a nanometer carbon tube, silicon dioxide, kaolin, magnesium oxide, sodium carbonate, zirconium dioxide, light calcium, cellulose, dimethyl itaconate, binders, coupling agents, compatibilizers, anti-oxidants, tranquilizers, bridging agents, conditioning agents, reinforcing agents, coagulants, toughening agents, stabilizers, and terminating agents. The wrapping layer is made of the following raw materials: silicon carbide fiber, graphite, silicon dioxide, silicon nitride, sodium metasilicate, sodium cellulose glycolate, initiators, crosslinking agents, softening agents, adhesion agents, catalysts, and fire retardants. The heat sink material of the invention has good mechanical properties, excellent insulation, thermal conductivity and low expansion coefficient, and can be widely applied to heat sink material for LED heat guiding and radiating in semiconductor technology.

The invention provides a heat sink material with high thermal matching performance for semiconductor lighting and relates to the technical field of semiconductor lighting. The heat sink material comprises graphene, boron oxide, alundum powder, a nickel conductive adhesive, barium titanate, sodium chloride, citric acid, chromic anhydride, magnesium oxide, polyurethane, calcium oxide, diatomite, hydroxyapatite, zirconium dioxide sol, rare earth, grape seed extract, dimethyl itaconate, a bonding agent, a coupling agent, a compatibilizer, an antioxidant and a stabilizing agent. The heat sink material with high thermal matching performance for semiconductor lighting, provided by the invention has good comprehensive performance and good mechanical property, excellent insulating property and thermal conductivity, and lower coefficient of expansion, can effectively improve the thermal matching ability and can be widely applied to a semiconductor technology.

The invention belongs to the technical field of drugs for treating degenerative diseases, and relates to application of dimethyl itaconate in preparation of a medicine for treating and/or preventing neurodegenerative diseases. Experiments prove that the dimethyl itaconate can alleviate the decline of learning and memory ability and the damage of synaptic ultrastructures, and reduce neuroinflammation.

The invention discloses a glass fiber reinforced AES resin material and a preparation method thereof. The glass fiber reinforced AES resin material is prepared from the following ingredients in parts by weight: 50-90 parts of acrylonitrile-ethylene propylene diene rubber-styrene, 10-40 parts of glass fibers, 3-10 parts of compatibilizer, 0.5-2 parts of coupling agent and 1-5 parts of dimethyl itaconate. The glass fiber reinforced AES resin material prepared by the preparation method has excellent tensile and bending properties and balanced flowability and impact properties. Due to the use of the glass fibers, the cost of the AES material is reduced, and the range of use of the AES material can be wider. The preparation method disclosed by the invention is simple and easy to implement. According to the glass fiber reinforced AES resin material and the preparation method thereof, a synergetic effect is achieved among the added dimethyl itaconate, the compatibilizer SMA (styrene-maleic anhydride copolymer) and the coupling agent, and the interfacial bonding strength between the AES and the glass fibers can be maximized, so that the mechanical properties of the material can be improved, and particularly the impact resistance of the material can be improved greatly.

The invention relates to an application of dimethyl itaconate in the preparation of a medicine for treating and/or preventing obesity-induced intestinal micro ecological disorder. Experiments prove that dimethyl itaconate can correct intestinal micro ecological imbalance of obese mice, reduce intestinal inflammation and maintain intestinal barrier integrity.

The invention discloses an abrasion-resistant optical material. The optical material comprises the following components in parts by weight: 66-70 parts of urethane acrylate, 20-40 parts of polypropylene, 10-30 parts of chopped glass fibers, 2-3 parts of dimethyl itaconate, 1-2 parts of a lubricant and 2-6 parts of a photoinitiator. According to the abrasion-resistant optical material, the abrasionresistance of the optical material can be effectively reinforced under the condition that other mechanical performance of the material is not reduced and the manufacture cost is relatively low; and the abrasion-resistant optical material prepared by the method has the advantages of an abrasion-resistant surface, strong environmental corrosion resistance, corrosion prevention and durability.

The invention discloses a glass fiber reinforced rigidity-and-toughness-balanced polyester composition and a preparation method thereof. The glass fiber reinforced rigidity-and-toughness-balanced polyester composition is prepared from the following ingredients in parts by weight: 100 parts of polyester, 1-5 parts of dimethyl itaconate, 20-100 parts of glass fibers, 0.1-0.5 part of antioxidant, 0.1-0.5 part of lubrication modifier and 0.1-0.2 part of coupling agent. The composition disclosed by the invention has excellent impact resistance while having very high strength and is an engineering plastic with relatively good rigidity and toughness balance; and the process for preparing the composition is simple and easy to operate, the processing formability is good, products are easy in demolding, and the surface appearance of the workpieces is good.

The invention discloses a preparation method for nebracetam, and belongs to the technical field of medical chemistry. The key points of the technical scheme of the invention are as follows: the preparation method for the nebracetam comprises the following steps: performing Michael addition reaction and intramolecular cyclization on dimethyl itaconate and benzylamine serving as raw materials to obtain 1-benzyl-5-oxopyrrolidin-3-carboxylic methyl ester; reducing the 1-benzyl-5-oxopyrrolidin-3-carboxylic methyl ester by sodium borohydride to obtain 1-benzyl-4-hydroxymethyl-pyrrolidine-2-keton; performing methyl sulfonylation on the 1-benzyl-4-hydroxymethyl-pyrrolidine-2-keton to obtain 1-benzyl-5-oxopyrrolidin-3-carboxylic methanesulfonate; finally, performing ammonification and reduction on the 1-benzyl-5-oxopyrrolidin-3-carboxylic methanesulfonate by using ammonia water to obtain the nebracetam. The preparation method is simple in preparation process, easy to control and high in target product yield, and meets the requirement for green chemistry.

The invention discloses a heat sink material used for a light emitting diode for high-luminance semiconductor illumination, and relates to the technical field of semiconductor illumination. The heat sink material comprises graphene, carbon nanotubes, silicon carbide, silver conductive adhesive, vanadium oxide, calcium carbonate, carboxymethyl cellulose sodium, aluminium oxide particles, magnesiumoxide, antimonous oxide, sodium metasilicate, bentonite, calcium phosphate, zirconium dioxide sol, light weight calcium, cellulose, dimethyl itaconate, a binder, a coupling agent, a compatilizer, an antioxidant and a stabilizing agent. The heat sink material has high comprehensive performance and mechanical performance, excellent insulativity and heat conductivity and relatively low expansion coefficient, and can be widely applied to the heat sink material used for the light emitting diode for high-luminance semiconductor illumination in the semiconductor technology.

The invention discloses a novel heat sink material, which is prepared from the following raw materials: a matrix and a wrapping layer, wherein the matrix is prepared from the following raw materials: graphite, yttrium oxide, aluminum nitride, silicon carbide, a carbon nanotube, silicon dioxide, bentonite, zinc oxide, calcium carbonate, zirconium dioxide sol, lightweight calcium, cellulose, dimethyl itaconate, a binder, a coupling agent, a compatilizer, an antioxidant, a stabilizing agent, a bridging agent, a regulator, an enhancer, a flocculation agent, a flexibilizer, a stabilizer and a terminating agent; and the wrapping layer is prepared from the following raw materials: a silicon carbide fiber, graphene, silicon dioxide, silicon carbide, sodium metasilicate, carboxymethyl cellulose sodium, an initiator, a cross-linking agent, a softening agent, a tackifier, a catalyst and a fire retardant. The prepared novel heat sink material has good mechanical property, excellent insulativity and thermal conductivity and a relatively low expansion coefficient, and can be widely applied to LED heat conduction and heat dissipation in a semiconductor technology.