Self-crosslinking organosilicone heat-resistant coating

Abstract

The invention relates to a self-crosslinking organosilicone heat-resistant coating capable of reaching good drying properties and excellent physical and chemical properties through a self-crosslinking reaction. The self-crosslinking organosilicone heat-resistant coating is characterized in that the coating is prepared from the following raw materials in parts by weight: 50-60 parts of modified organosilicone resins with a concentration not less than 60%, 0.3 part of dispersant BYK, 0.4 part of organic bentonite, 10-15 parts of pigment, 5-10 parts of mica powder with a particle size of 350-450meshes, 5-10 parts of precipitate barium sulfate with a particle size of 350-450 meshes, 5-10 parts of talc powder with a particle size of 350-450 meshes and 10-20 parts of xylene; and the coating can achieve good drying properties and excellent physical and chemical properties through a self-crosslinking reaction in a 25 DEG C environment. Through the coating, the shortcomings of the existing one-component organosilicone products are solved, the coating has good heat resistance, and simultaneously the coating layer formed by the coating has excellent mechanical strength and protective properties. The coating provided by the invention is adaptable to the decorative protection of large-sized heat-resistant components, the components coated by the coating can withstand the temperature of 450 DEG C for a long term and can withstand long-term UV (ultraviolet) exposure, and the coating layer is not damaged.

Description

technical field [0001] The invention relates to a coating, in particular to a self-crosslinking silicone heat-resistant coating which can achieve good drying performance and excellent physical and chemical properties through self-crosslinking reaction. Background technique [0002] The current silicone heat-resistant coatings have poor self-drying properties. Generally, one-component silicone coatings must be baked and cured at a temperature of 150°C. The self-drying silicone coatings on the market either rely on the volatilization of solvents to form films. The mechanical strength of the coating is very low before heat resistance, and the protective performance is very poor, either by introducing reactive organic groups, such as hydroxyl groups, epoxy groups, etc., to achieve the purpose of curing through the crosslinking reaction of active organic groups. Although the coating has good mechanical strength and protective properties, the content of organic silicon is greatly...

AI Technical Summary

Problems solved by technology

[0002] The current silicone heat-resistant coatings have poor self-drying properties. Generally, one-component silicone coatings must be baked and cured at a temperature of 150°C. The self-drying silicone coatings on the market either rely on the volatilization of solvents to form films. The mechanical strength of the coating is very low before heat resistance, and the protective performance is very poor, either by introducing reactive organic groups, such as hydroxyl groups, epoxy groups, etc., to achieve the purpose of curing through the crosslinking reaction of active organic groups. Although the coating has good mechanical strength and protective properties, the content of organic silicon is greatly reduced, and the heat resistance of the coating is limited.

Images