Coating knowledge: classification of heat resistant coatings

Core tip: at present, high temperature resistant coatings in the market are mainly inorganic high temperature resistant coatings and organic high temperature resistant coatings Among them, inorganic high temperature resistant coatings mainly include ceramic coating, silicate coating, phosphate coating and zinc rich primer, while organic high temperature resistant coatings mainly include fluororesin coating, heterocyclic polymer coating and organosilicon high temperature resistant coating Fluorocarbon paint with fluororesin paint refers to the paint with fluororesin as the main film-forming material, also known as fluorocarbon paint, fluorocarbon paint, fluororesin paint, etc Among all kinds of coatings, due to the introduction of fluorine, the fluororesin coating has great electronegativity and strong carbon fluorine bond energy, and has particularly superior performance: weather resistance, heat resistance Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings: at present, high temperature resistant coatings in the market are mainly inorganic high temperature resistant coatings and organic high temperature resistant coatings Among them, inorganic high temperature resistant coatings mainly include ceramic coating, silicate coating, phosphate coating and zinc rich primer, while organic high temperature resistant coatings mainly include fluororesin coating, heterocyclic polymer coating and organosilicon high temperature resistant coating Fluorocarbon paint with fluororesin paint refers to the paint with fluororesin as the main film-forming material, also known as fluorocarbon paint, fluorocarbon paint, fluororesin paint, etc Among all kinds of coatings, due to the introduction of large electronegativity of fluorine element and strong carbon fluorine bond energy, fluororesin coatings have particularly superior performance: weather resistance, heat resistance, low temperature resistance, chemical resistance, and unique non stick and low friction Its core technology was born in DuPont company in 1938 The physical and chemical properties of fluororesin coatings in the global chemical industry at that time The world caused a sensation Organosilicon resin is the most common film-forming material of high temperature resistant coating, because the bond energy of silicon oxygen bond is as high as 443kj · mol-1, and organosilicon resin has the following advantages: (1) good thermal stability: the covalent bond energy of Si-O bond is higher than that of C-C bond of common organic polymer, as high as 443kj · mol-1, which increases the bond energy stability of organosilicon polymer The C-C bond in ordinary polymers is easy to break into low molecular weight due to thermal oxidation, while the more stable Si-O-Si bond with high cross-linking is formed after the hydrocarbon base connected on the atom in organosilicon polymers is heated and oxidized, forming the protective layer of Si-O chain, reducing the impact on the inside of polymers (2) Oxidation resistance: in the Si-O bond, the difference between the relative electronegativity of the silicon atom and the oxygen atom is large, so the polarity of the Si-O bond is large, which plays a shielding role in the oxidation energy of the connected hydrocarbon groups (3) Special molecular structure: the basic structural unit (i.e main chain) of organosilicon polymer is composed of Si-O chain links, and the side chain is connected with other organic groups through silicon atom Therefore, the structure of organosilicon product contains both "organic group" and "organic structure" This special composition and molecular structure make it integrate the characteristics of organic matter and the functions of inorganic matter Therefore, silicone resin has excellent weather resistance, heat resistance, light retention, acid rain resistance, stain resistance, moisture-proof, hydrophobic, electrical insulation, chemical stability and other properties Some varieties also have radiation resistance, oil resistance and solvent resistance At present, the research of high-temperature coatings is to solve the problem of room temperature curing of high-temperature resistant coatings, so that they can form film when cured at room temperature, and the performance of high-temperature and corrosion resistance is improved Secondly, the application performance of high temperature coating should be expanded, such as temperature resistance and acid-base corrosion resistance Thirdly, it is necessary to broaden the range of temperature resistance, and strive to be between 800 ℃ ~ 1800 ℃, or higher temperature, so that the equipment can get long-term high temperature protection Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,