Application and analysis of UV curable acrylic polyurethane coatings-Iota

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News > Dynamic industry > Application and analysis of UV curable acrylic polyurethane coatings

Application and analysis of UV curable acrylic polyurethane coatings

Solvent pollution and inflammable problem solving in a way is with light cured resin paint to replace the thermal plastic acrylic resin coating. For example: in containing UV absorber surface PVC agricultural film, coated with cationic polymerization type UV curing resin coating (often with the cationic polymerization UV curing resin is epoxy resin and UV curing acrylic polyurethane resin coating.

In PVC film side, coated with a layer containing colloidal silica on the UV curing acrylic polyurethane coating, the film covered greenhouse and plastic shed, the dust can be preserved for a long time. In addition, anti adhesion of the film.

The UV curing coatings in addition to containing poly urethane (PU), also contains a polymerizable monomer (reactive diluent) and sensitizing agents (photo initiator). If necessary, can also increase the organic solvent and additives increase the adhesion of the.

Acrylic polyurethane coatings for the light polymerization can be from polyether polyol, polyester polyol or polyether ester polyol and polyisocyanate reaction of polyurethane polyol, and a polyfunctional isocyanate reaction, finally and containing active hydrogen atom of the vinyl monomer reaction and.

Light sensitizing agent is photo induced polymerization initiator, it is known as the photoinitiator, sometimes referred to as the photosensitizer and applicable light increased sense of agent benzoin, benzoin methyl ether, benzoin ethyl ether, rest, ether, benzoin ether, second ketone benzene, anthraquinone. Naphthalene and other.

If necessary (if the coating viscosity is too high), can be added to adjust the viscosity of organic solvent, suitable solvent butanone. Methyl isobutyl ketone, ethyl acetate, butyl acetate; ethanol, isopropanol, toluene and xylene etc.. If the adhesion or the construction performance of the paint is not satisfactory, it can also be added in the appropriate additives. The suitable paint additives are the organic fluorine surfactants or the silicone surfactants.. Organic fluorine surfactant can reduce the surface tension of the coatings and improve the coating on the film wettability; silicone surface active agent is known as coupling agent also helped to improve the adhesion between the coating and the film.

If the UV hardening coating is too hard, a small amount of thermoplastic resin can be added in the coating formulation to increase the film's flexibility.. Application of thermal plastic resin is polystyrene, polyvinyl chloride, vinegar butyl cellulose, polybutadiene rubber, low molecular weight, low molecular poly diallyl phthalate etc..

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