Paint knowledge | performance introduction of epoxy paint

Core tips: ① excellent chemical resistance The cured epoxy resin has outstanding chemical properties, alkali resistance and oil resistance This is because there is no ester bond in the epoxy resin, the aliphatic hydroxyl contained in the epoxy resin does not react with alkali, and the cured paint is a three-dimensional network structure Therefore, epoxy coating is often used as anticorrosive primer, oil tank and other inner walls But the acid resistance of epoxy paint is generally poor ② Strong adhesion Especially for metal (steel, aluminum), ceramics, glass, concrete, wood and other polar base materials The reason is that epoxy resin has strong polar ether group and hydroxyl group, which has strong interaction with the substrate interface ③ High strength and toughness Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Home of coatings: ① excellent chemical resistance The cured epoxy resin has outstanding chemical properties, alkali resistance and oil resistance This is because there is no ester bond in the epoxy resin, the aliphatic hydroxyl contained in the epoxy resin does not react with alkali, and the cured paint is a three-dimensional network structure Therefore, epoxy coating is often used as anticorrosive primer, oil tank and other inner walls But the acid resistance of epoxy paint is generally poor ② Strong adhesion Especially for metal (steel, aluminum), ceramics, glass, concrete, wood and other polar base materials The reason is that epoxy resin has strong polar ether group and hydroxyl group, which has strong interaction with the substrate interface ③ High strength and toughness When the strength is high, the epoxy resin contains aromatic ring; when the toughness is good, the epoxy resin contains ether bond, which endows it with the ability of internal rotation of molecular chain, and is not easy to be brittle broken ④ Good electrical insulation The cured epoxy resin shows excellent insulation Its electrical properties are 35 ~ 50kV / mm breakdown voltage at room temperature and 10 Ω Cm volume resistance ⑤ Good heat resistance Generally 80 ~ 100 ℃, some of which are as high as 200 ℃, or even higher ⑥ The curing shrinkage is small Stable size, not easy to crack Generally 1% ~ 2% 8% ~ 10% for phenolic resin, 4% ~ 6% for unsaturated polyester resin and 4% ~ 8% for organosilicon resin ⑦ Poor light aging The aromatic ether bond in the cured epoxy resin is degraded and broken under ultraviolet irradiation, so the outdoor weather resistance is poor The paint film cured by bisphenol-A epoxy resin is easy to be powdered and lose light in outdoor, so it is not suitable for outdoor anticorrosive paint But heterocyclic and aliphatic epoxy paints can be used outdoors ⑧ Low temperature curing is poor Generally, the curing temperature of epoxy resin is above 10 ℃, otherwise, the curing is slow Generally, it is not suitable to construct under 10 ℃, which makes it difficult to construct large outdoor objects in winter 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,