11 results about "Bisphenol A" patented technology

The invention discloses a fiber-enhanced epoxy resin composition for quickly forming an automobile part and a preparation method thereof. The fiber-enhanced epoxy resin composition for quickly forming the automobile part comprises a component A and a component B. The component A comprises bisphenol A epoxy resin 127, a three-functional group glycidyl ether diluent XY636 and alicyclic epoxy resin TTA21; and the component B comprises diethylenetriamine DETA, isophorone diamine IPDA, methyl cyclohexanediamine HTDA, 1,3-bis(aminomethyl)-cyclohexan BAC and 2,4,6-tri(dimethylamino methyl) phenol DMP-30. The epoxy resin composition can be quickly cured and is suitable for a quick curing forming process of a fiber-enhanced composite material by means of a high pressure pouring process (HP-RTM) or a wet process molding process (WCM) and the like. The fiber-enhanced composite material prepared by the epoxy resin composition has excellent mechanical properties. The preparation method of the epoxy composition has the advantages of being simple in process and convenient to operate.

The invention discloses a method for preparing a wollastonite toughened epoxy resin. The method comprises the following steps: (1) hydrolyzing a silane coupling agent in a mixed solution of absolute ethyl alcohol and deionized water, adding the solution into a flask, and adding wollastonite; (2) placing the flask in a water area, conducting reaction under electromagnetic stirring, performing suction filtration on the mixed solution, and drying the precipitate in a vacuum oven; (3) grinding the dried modified wollastonite in a planetary ball mill, thereby obtaining the modified wollastonite; (4) mixing the modified wollastonite and a bisphenol A epoxy resin 127, and grinding through a three-rod grinder for 3 hours, thereby obtaining a master batch with solid content, wherein the rod spacing of the grinder is 15pm, the grinding time is 2 hours, and a mass ratio of the modified wollastonite to the epoxy resin is 2:3; (5) uniformly mixing the epoxy resin, methyl tetrahydrophthalic anhydride and modified wollastonite master batch, and adding an initiator BDMA, a release agent silicone oil and an antifoaming agent BYK-530 for mixing, so that the stability of the modified wollastonite in the epoxy resin system is improved.

The invention provides a preparation method of an energy-saving and environment-friendly flame retardant tetrabromobisphenol A. The preparation method comprises the following steps of: (1) adding a certain amount of bisphenol A into chlorobenzene, stirring for 0.5 h until the materials are uniformly mixed, and dropwise adding bromine and hydrogen peroxide at the same time at a specific temperature to obtain a tetrabromobisphenol A solution; and (2) heating the reaction system, carrying out curing reaction, standing after curing, separating out a water phase, collecting an organic phase, carrying out standing layering treatment for four times, cooling the organic phase collected after four-time standing layering to 8 DEG C by adopting frozen brine, and carrying out suction filtration to obtain a tetrabromobisphenol A product. According to the preparation method disclosed by the invention, the mother liquor can be used for more than 100 times, the generation of waste residues is reduced, and the use amount of sodium nitrite can be saved by 50%; after the mother liquor is recycled for 100 times, the chromaticity of the product is 20, the purity is 99.35%, and the yield is 99.8%; and the comprehensive yield of the product is 99.6%, and the average purity of the product is 99.54%.

The invention provides a bisphenol A salt preparation method, wherein bisphenol A and an inorganic strong base are directly subjected to a solvent-free reaction to obtain a bisphenol A salt. The preparation method comprises the following steps: (1) crushing and mixing bisphenol A and an inorganic strong base to obtain an ultrafine mixture; (2) heating and stirring the mixture, and carrying out a reaction to obtain a crude product; and (3) carrying out reduced pressure distillation on the crude product to remove residual excessive bisphenol A, and cooling to obtain bisphenol A salt solid powder. The method has the advantages that no solvent is used in the whole reaction process, the reaction is simple and rapid, the yield is high, and the product purity is high.

The invention discloses a processing material for a stirring paddle of a chemical reaction kettle and a preparation method of the processing material, and relates to the technical field of chemical equipment materials. The processing material is prepared from the following raw materials in parts by weight: 15 to 20 parts of bisphenols A epoxy resin, 15 to 20 parts of saturated polyester resin, 10 to 15 parts of polyvinyl chloride resin, 5 to 10 parts of chlorinated polyvinyl chloride, 4 to 8 parts of cinerite, 3 to 6 parts of ceramic fine powder, 2 to 4 parts of ultrafine polytetrafluoroethylene powder, 2 to 4 parts of a flexibilizer, 1 to 2 parts of asbestos powder, 1 to 2 parts of sepiolite fiber, 1 to 2 parts of polyglycerol polyricinoleate, 0.5 to 1 part of bissulfonimide and 0.5 to 1 part of nano rubber powder. The processing material disclosed by the invention is high in processing formability, and can be made into stirring paddles of different sizes and structures; furthermore, the prepared stirring paddle is excellent in corrosion resistance, wear resistance and high-temperature resistance.

The invention discloses a high-temperature-resistant thermoplastic elastomer and a preparation method thereof. The high-temperature-resistant thermoplastic elastomer is prepared from the following raw materials in parts by weight: 15-25 parts of cis-1,4-polybutadiene rubber, 20-25 parts of acrylate rubber, 5-7 parts of bisphenol A novolac epoxy resin, 10-12 parts of diphenylmethane bismaleimide, 8-12 parts of polyethylene, 5-8 parts of paraffin oil, 3-5 parts of polyethyleneglycol, 4-6 parts of dibasic lead phosphite, 4-6 parts of N,N-diacetyladipyldiamido hydrazine, 1-4 parts of dibutyltin dilaurate, 1-5 parts of citric acid, 3-6 parts of calcium carbonate, 2-4 parts of mullite powder, 8-15 parts of fly ash and 10-15 parts of modified composite filler. The high-temperature-resistant thermoplastic elastomer has the advantages of excellent aging resistance, excellent high-temperature resistance, favorable flame-retardant effect and high oxygen index (up to 33% or above), and can be used in a high-temperature environment for a long time without the phenomena of cracking, bending, shrinkage and the like.