96 results about "O-Hydroxybenzoic Acid" patented technology

The invention discloses composite binder for powder injection moulding and a preparation and application method. The composite binder for powder injection moulding comprises raw materials including furfuryl alcohol, trimethylolpropane, polypropylene, o-hydroxybenzoic acid, polyacrylamide, palm wax, microcrystalline wax and epoxidized soybean oil and further comprises boric acid and water. The composite binder combining thermoplasticity and a thermosetting system is adopted, advantages of thermoplasticity and the thermosetting system are utilized, on one hand, the problems that conventional binder is excessively long in thermal degreasing time and low in production efficiency are solved, and the degreasing rate can reach 90% or above within 6 hours; on the other hand, the yield rate of a powder injection moulding product is raised, and quality of a finished product is improved.

The invention discloses a traffic control circuit welding welding-assisting material and a preparing method of the welding-assisting material and relates to the technical field of welding. The traffic control circuit welding welding-assisting material comprises, by weight, 20-30 parts of ethyl alcohol, 3-5 parts of methyl alcohol, 1-3 parts of diethylene glycol monoethyl ether, 1-2 parts of o-hydroxybenzoic acid, 2-5 parts of wax, 1-2 parts of emulgator, 50-60 parts of deionized water and 5-8 parts of colophony. The traffic control circuit welding welding-assisting material can be used for obviously improving the high-low temperature resisting feature and the welding strength of a welded finished product and meanwhile, can protect the health of an operating worker and the atmosphere environment.

The invention discloses electrostatic spraying powder and an application method thereof in a sealing copper gate valve, and relates to the technical field of electrostatic spraying powder. The electrostatic spraying powder is prepared from the following raw materials in parts by weight: 60-65 parts of epoxy resin, 15-20 parts of modified rosin resin, 12-15 parts of nanometer ceramic powder, 10-12 parts of nanometer calcium carbonate, 10-12 parts of dodecanol ester, 8-10 parts of polyvinyl chloride, 8-10 parts of organic bentonite, 5-8 parts of nitrocellulose, 5-8 parts of zinc oxide, 3-5 parts of o-hydroxy phenyl benzoate, 3-5 parts of naphthenic acid soaps, 2-3 parts of tributyl phosphate, 2-3 parts of cetyl trimethyl ammonium chloride, 3-5 parts of castor oil oxide, 15-20 parts of butyl acetate and 20-25 parts of water. The electrostatic spraying powder suitable for the sealing copper gate valve, which is disclosed by the invention, is prepared through the addition of various coating additives by taking the epoxy resin and the modified rosin resin as main raw materials and carrying out modifying treatment by adopting the nanometer ceramic powder and the nanometer calcium carbonate, and a coating obtained after the electrostatic spraying powder is sprayed not only has high anti-corrosion property, but also achieves the smoothness and flatness of a surface, so that the beautiful degree of the valve is increased.

The invention relates to a composite for manufacturing an automobile seat cover and a preparation method of the composite. The composite is prepared from the following constituents in parts by mass: 50-70 parts of butadiene rubber, 15-30 parts of silicon carbide fibers, 10-25 parts of polyacrylate fibers, 15-30 parts of diatomite, 2-9 parts of aluminum oxide, 1-7 parts of azodicarbonamide, 2-7 parts of phenyl salicylate, 3-9 parts of aluminum borate whiskers, 0.1-0.5 parts of unsaturated polyester resin, 0.5-1.8 parts of titanium dioxide, 0.1-0.5 parts of epoxy resin, 1-3 parts of color master batch and 1-2 parts of 2,4-dihydroxybenzophenone. The automobile seat cover manufactured from the composite provided by the invention has excellent performance of breathability, static resistance, ultraviolet resistance and pressure resistance, is good in elasticity, abrasion resistance and dirt resistance, and can also effectively absorb peculiar smell in an automobile.

The invention discloses a preparation method of an ultraviolet-resistant polyester film, which is characterized by comprising the following steps: adding o-hydroxybenzoic acid and acetone into a reaction kettle, dropwisely adding acetyl chloride, and carrying out esterification reaction to obtain o-cresol diacetate; adding dichloroethane, N, N-dimethylformamide and anhydrous aluminum trichloride,dropwise adding a dichloroethane solution of solid phosgene, carrying out an acylation reaction, and distilling to recover the solvent; adding dilute hydrochloric acid and performing cooling, standing, solid precipitation, suction filtration, water washing and recrystallization after a hydrolysis reaction to obtain an ultraviolet light absorber; performing condensation polymerization reaction on terephthalic acid, ethylene glycol, an ultraviolet light absorber, antimonous oxide and trimethyl phosphate to obtain polyester chips; drying the polyester chips, extruding through an extruder, preparing a cast sheet through a cold drum, longitudinally stretching and transversely stretching the cast sheet, carrying out heat setting, and cooling to obtain the ultraviolet-resistant polyester film. The ultraviolet-resistant polyester film prepared by the method is suitable for solar backboard base films, building films, furniture films, packaging films and the like.