Coating knowledge: UV hardening acrylic polyurethane resin coating

It is suggested that one of the ways to solve the problem of solvent pollution and flammability is to use UV curable resin coating instead of thermoplastic acrylic resin coating For example, on the surface of PVC agricultural film containing UV absorbent, UV curable resin coating of cationic polymerization is applied (the common UV curable resin of cationic polymerization is epoxy resin and UV curable acrylic resin Acrylic polyurethane resin coating One side of the PVC film is coated with a UV hardenable acrylic polyurethane coating containing colloidal silica The film covers the greenhouse or plastic shed, which can keep its dust-proof performance for a long time In addition, the adhesion resistance of the film is better this 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 coating Home news: one of the ways to solve the problem of solvent pollution and flammability is to use UV curable resin coating instead of thermoplastic acrylic resin coating For example, on the surface of PVC agricultural film containing UV absorbers, the UV curable resin coating of cationic polymerization is applied (the common UV curable resin of cationic polymerization is epoxy resin and UV curable propylene Acid polyurethane resin coating One side of the PVC film is coated with a UV hardenable acrylic polyurethane coating containing colloidal silica The film covers the greenhouse or plastic shed, which can keep its dust-proof performance for a long time In addition, the adhesion resistance of the film is better This UV hardening coating contains not only polyurethane, but also polymerizable monomers (active diluents) and sensitizers (photoinitiators) If necessary, it can also increase organic solvents and adhesion agents The photopolymerizable acrylic polyurethane for coating can be obtained by the reaction of polyether polyol, polyester polyol or polyether ester polyol with polyisocyanate, and then the reaction with multifunctional isocyanate, and finally the reaction with ethylene monomer containing active hydrogen atom Photosensitizer is the initiator of photopolymerization, so it is called photoinitiator, sometimes it is also called photosensitizer The suitable photosensitizers are benzoin, benzoin methyl ether, benzoin propyl ether, benzoin butyl ether, benzoin phenyl ether, diphenyl ketone and onion quinone Naphthoquinone, etc If necessary (if the viscosity of the coating is too high), organic solvent can be added to adjust the viscosity The applicable solvent is butanone Methyl isobutyl ketone, ethyl acetate, butyl acetate; ethanol, isopropanol, toluene, xylene, etc If the adhesion or construction performance of the coating is not ideal, appropriate additives can also be added The suitable coating additives are organic fluorine surfactants or organosilicon surfactants Organofluorine surfactant can reduce the surface tension of the coating and improve the wettability of the coating to the film; organosilicon surfactant is called coupling agent, which also helps to improve the adhesion between the coating and the film If the UV hardened coating is too hard, a small amount of thermoplastic resin can be added to the coating formula to increase the flexibility of the coating Suitable thermoplastic resins include polystyrene, polyvinyl chloride, cellulose acetate, rubber, low molecular weight polybutadiene, low molecular weight polydiallyl phthalate, etc [focus on WeChat official account "paint net"; pay attention to surprises; scan code to see what the paint sales are Great! 》Paint home is specialized in coating, diatom mud, paint coating, coating process, news information and coating of fireproof coating, diatom mud, paint coating, coating process, decoration knowledge and decoration effect map of fireproof coating,