Common sense of coating: analysis of the causes of coating yellowing and Solutions

Core tip: yellowing is a form of color change of paint film, which is similar to the cause of color change and fading Yellowing mainly occurs in white or light colored paint, or transparent varnish film in sunlight or ultraviolet light or when heated to yellow, or even brown On the one hand, yellowing is related to the light resistance of resin adhesive Alkyd resin containing dry oil (high unsaturation), gumalon resin, epoxy resin containing aromatic group, TDI Polyurethane, phenolic resin, etc tend to yellowing On the other hand, pigments with poor light resistance such as lead white, lithopone and anatase titanium dioxide can also turn yellow In addition, 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: yellowing is a form of color change of paint film, which is basically similar to the causes of color change and fading Yellowing mainly occurs in white or light colored paint, or transparent varnish film in sunlight or ultraviolet light or when heated to yellow, or even brown On the one hand, yellowing is related to the light resistance of resin adhesive Alkyd resin containing dry oil (high unsaturation), gumalon resin, epoxy resin containing aromatic group, TDI Polyurethane, phenolic resin, etc tend to yellowing On the other hand, pigments with poor light resistance such as lead white, lithopone and anatase titanium dioxide can also turn yellow In addition, excessive drier can also cause alkyd paint yellowing There are several solutions to the wall yellowing after a long time of paint coating construction: 1 Ensure that the products with good weather resistance are used outdoors; 2 Ensure that the wall base conditions meet the construction requirements; 3 Select products with strong chemical resistance for special industrial environment; 4 Paint emulsion paint after polyurethane floor furniture paint is completely dry; 5 Special high temperature paint shall be used under high temperature conditions For the resin, nitrocellulose, acrylic resin, short oil alkyd amino resin, chlorinated polyolefin resin, aliphatic polyurethane, organosilicon resin and fluorocarbon resin can be selected Rutile titanium dioxide in white pigment is suitable for outdoor use In order to improve the weatherability of pigment, it can also be treated The development of new pigments is very fast In addition, the addition of some antioxidants, UV absorbers, heat stabilizers and other additives in the coating is also an effective way to prevent yellowing 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,