5 results about "DIAPHENYLSULFONE" patented technology

This application belongs to the field of chemical synthesis technology and discloses polyetheretherketone and its preparation method. The preparation method includes: under a protective atmosphere, reacting hydroquinone and a salt-forming agent in a composite antioxidant system to obtain a first mixture containing hydroquinone salt; reacting the first mixture with 4,4'-difluorobenzophenone to obtain a second mixture; adding a capping agent to the second mixture to carry out a capping reaction to obtain polyetheretherketone; wherein the composite antioxidant system includes diphenyl sulfone, sodium lignosulfonate, sodium metabisulfite, and sodium hypophosphite. This preparation method has few side reactions, high yield, and the prepared polyetheretherketone exhibits excellent properties.

The present invention aims to provide polyimides and molded articles such as films that are environmentally safe, soluble in organic solvents, and have excellent transparency. [Solution] The above problem can be solved by a polyimide having a tetracarboxylic dianhydride component and a diamine component, wherein the diamine component comprises a fluorine atom-containing diamine having a CF3-O- structure selected from 2,2'-bis(trifluoromethoxy)benzidine, 3,3'-bis(trifluoromethoxy)benzidine, and / or 2,3'-bis(trifluoromethoxy)benzidine, and a diaminodiphenyl sulfone, and the tetracarboxylic dianhydride component comprises a tetracarboxylic dianhydride having a fluorene structure.

This invention relates to the field of polyimide synthesis technology, specifically to polyimide materials possessing both high temperature resistance and high toughness, their preparation methods, molded parts, and applications; comprising the following monomers obtained through aqueous phase polymerization: rigid dianhydride monomer, rigid diamine monomer, flexible diamine monomer, and crosslinking monomer; wherein the rigid dianhydride monomer is selected from pyromellitic dianhydride and biphenyl dianhydride; the rigid diamine monomer is selected from diaminodiphenyl ether and phenylenediamine; the flexible diamine monomer is selected from diaminodiphenyl sulfone and bis[(aminophenoxy)phenyl]propane; and the crosslinking monomer is triaminobenzene; the material of this invention uses aromatic rigid groups as the main chain, introduces flexible segments into the side chains, and combines a small amount of crosslinking units, using green aqueous phase polymerization to obtain polyimide that can achieve both high temperature resistance and high toughness, and the mechanical strength and molding performance are superior to existing aqueous phase polymerized products and commercial products, and the toughness can be improved without the addition of toughening agents.

This invention belongs to the technical field of coating compositions, specifically relating to a heat-resistant and flame-retardant coating based on a high-performance masterbatch, a battery flame-retardant film, and their preparation methods. The coating comprises, by weight, 50-80 parts of tackifying resin, 35-45 parts of bisphenol A diglycidyl ether epoxy resin, 15-20 parts of DCPD phenol epoxy resin, 30-50 parts of masterbatch, 5-9 parts of nanofiller, 6-10 parts of 4,4'-diaminodiphenyl sulfone, 0.3-0.5 parts of dicyandiamide curing agent, 0.1-0.5 parts of accelerator A, 4-7 parts of accelerator B, 1-3 parts of silane coupling agent, and 480-700 parts of solvent. The nanofiller is a mixture of amino POSS and nano-SiO2, exhibiting good high-temperature flame-retardant properties.

The application relates to the technical field of carbon fiber composite materials, in particular to a lightweight carbon fiber composite kayak body material for kayaks and a preparation method thereof. A terpolymer is obtained by copolymerization of dicyclopentadiene, isobornyl acrylate and styrene, and then the terpolymer is compounded with a diphenyl epoxy resin and 4,4'-diamino diphenyl sulfone to form a modified resin matrix. Then, the modified resin matrix is made into a resin film, and the resin film and a carbon fiber reinforcement are made into a prepreg through a hot melting method. Finally, the composite kayak body material is prepared through layering, adding a sandwich layer and adopting a hot press tank curing forming. The kayak body material prepared by the application has the characteristics of heat-resistant stability, reduced water absorption, improved fracture toughness and the like, can effectively transfer and disperse loads, reduce stress concentration, improve bending stiffness and weight efficiency, and inhibit crack propagation.