Coating classification: moisture curing polyurethane coating

It is suggested that moisture curing polyurethane coating belongs to one component polyurethane coating Moisture curable one component polyurethane coating is a very important anticorrosive coating, which is composed of prepolymer, low water content solvent, pigment, dehydrating agent, auxiliary agent and catalyst formed by the reaction of excessive polyisocyanate and hydroxyl containing polymer (such as polyester resin, polyether resin, epoxy resin, alkyd resin, castor oil resin, etc.), in which - NCO group content is 10% - 15%, NCO / Oh molar ratio is about 3, or much greater than 3 The curing of moisture curing polyurethane coating is related to the water in the air 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: moisture curing polyurethane coating belongs to one component polyurethane coating Moisture curing one component polyurethane coating is a very important anticorrosive coating It is a prepolymer, low water content solvent and pigment produced by the reaction of excessive polyisocyanate and hydroxyl containing polymer compounds (such as polyester resin, polyether resin, epoxy resin, alkyd resin, castor oil resin, etc.) Among them, the content of - NCO group is 10% - 15%, and the NCO / Oh molar ratio is about 3, or much more than 3 The curing of moisture curing polyurethane coating is the reaction of contacting with water in the air, - NCO group and H2O, forming amines and carbon dioxide, amines continue to react with - NCO, crosslinking into a large number of urea bond and urea formate bond coatings, but there are still a large number of - NCO groups left in the coating According to the curing mode, it can be divided into moisture curing and latent curing polyurethane coatings The construction range of moisture curing polyurethane coating is wide, above zero degree, and the relative humidity is 30% - 98 %It can also be applied Compared with two-component polyurethane coating, it is simple to apply, has excellent film-forming performance at low temperature and high humidity (the surface of workpiece can be fully cured even under wet conditions), low requirements for substrate treatment, good surface tolerance and adhesion to various substrates, excellent wear resistance, corrosion resistance, pollution resistance, better water resistance Flexibility and protection against atomic radiation However, it is difficult to prepare the color paint for this kind of paint, and the storage period is short The degree of curing depends on the temperature and humidity in the air The humidity is less than 30% The drying speed of the film is very slow, and it can not be cured completely, which affects the performance of the film On the contrary, the humidity is too high and the drying speed is too fast, which causes difficulties in storage and construction, especially in winter This kind of coating is widely used in large-scale steel structure which can not be heated in the oven, especially for metal and concrete Surface protection, industrial maintenance, marine anti-corrosion, can also be used for construction in wet environment, as well as underground facilities, metal, masonry, anti nuclear radiation, and special lubricant resistant coating, which can be used as both primer and finish, with good compatibility Among them, aliphatic polyurethane coating is particularly suitable for anti-corrosion coating in harsh environment, while aromatic polyurethane coating can be used as sealing primer, primer, intermediate paint and indoor paint In addition, the coating with high solid content can be prepared with low cost 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,