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May 9, 2020
Modified silicone high temperature resistant paint is a modified silicone high temperature resistant paint prepared by polycondensation or polymerization reaction between the active group of organic resin and the hydroxyl group, alkoxy group or unsaturated hydrocarbon group in the silicone intermediate oligomer. Mainly include epoxy modified silicone resin, polyurethane modified silicone resin and alkyd modified silicone resin. In addition to the reduced heat resistance of this type of coating, its curability, solvent resistance, and mechanical strength are greatly improved over pure silicone; its color retention, adhesion, and flexibility are better than cold-mixed. .
(1) Epoxy modified silicone high temperature resistant paint: Silicone high temperature resistant paint is based on non-aromatic epoxy resin, polysiloxane and organic oxygen-containing silane, with partially or fully substituted amino amine as curing agent , Organotin as a catalyst, so that polysiloxane and organosiloxane hydrolysis to form silanol, and then polycondensation to form a linear epoxy modified silicone resin.
(2) Polyurethane modified silicone high temperature resistant paint: Polyisocyanate or isocyanate as the chain end resin can react with silicone resin to obtain polyurethane modified silicone high temperature resistant paint containing free isocyanate groups, which can be cured at room temperature, It can also significantly improve the adhesion, wear resistance, oil resistance and chemical resistance of silicone. The silicone resin obtained by hydrolysis with alkyl chlorosilane is modified with polyurethane to obtain a polyurethane-modified silicone high temperature resistant paint that can be cured at room temperature. The coating developed on the basis of the coating has the ability to be cured at room temperature and is heat resistant. Features of weather resistance and good electrical insulation.
(3) Alkyd modified silicone high temperature resistant paint: Alkyd-organosilicon copolymer resin obtained by co-condensation of hydroxypolysiloxane and paulownia oil alkyd oligomer, its water resistance, weather resistance and heat resistance are obtained Significant improvement. The ethoxy hydroxy silicone resin and alkyd resin are co-condensed and dried at 200 ℃, the resulting resin has improved bending resistance and heat resistance, good adhesion, and waterproof and salt water resistance.
(4) Polyacrylic acid modified silicone high temperature resistant paint: In-situ graft polymerization of organosiloxane is used to modify acrylic resin, which not only improves the physical and mechanical properties of the material, but also improves the heat resistance and solvent resistance of the material Sex and salt spray resistance. In addition, by polymerization of acrylate and silicone macromolecules, a high temperature silicone paint for surface modification can be obtained. The coating containing the polymer can give the substrate surface good water resistance, weather resistance, chemical resistance, stain resistance and solvent resistance.