Preparation and Properties of Polyurethane Acrylate and Siloxane Polymer Based Hard Coatings

Plastic is an indispensable material in modern society, which has been widely used in the fields related to high-tech products, such as the flexible electronic screens and the shell of electronic products. but the surface hardness of plastic is low and easy to be scratched, so it is necessary to harden the surface of plastics. polyurethane acrylate coatings are commonly used hardening material on plastic surface. silicone polymers possess many excellent performances in various fields, especially in the coating industry due to their unique chemical structure. silicone hard coatings, as a protective coating on optical plastic surface shows outstanding performance in improving the abrasion resistance property. a series of polyurethane acrylates such as hyperbranched polyurethane acrylate with highly rigid hyperbranched cores and polyurethane acrylate branched compounds with different diamines were paperpared. a series of siloxane polymers were paperpared. different hard coatings were prepared based on the obtained polyurethane acrylates and siloxane polymers. the hard coatings showed a good transmittance as higher than 90 % and the pencil hardness was higher than 5h. the hardness improvement mechanism was discussed.

Preparation and properties of polyurethane acrylate and siloxane polymer based hard coatings

Plastic is an indispensable material in modern society, which has been widely used in the fields related to high-tech products, such as the flexible electronic screens and the shell of electronic products. But the surface hardness of plastic is low and easy to be scratched, so it is necessary to harden the surface of plastics. Polyurethane acrylate coatings are commonly used hardening material on plastic surface. Silicone polymers possess many excellent performances in various fields, especially in the coating industry due to their unique chemical structure. Silicone hard coatings, as a protective coating on optical plastic surface shows outstanding performance in improving the abrasion resistance property. A series of polyurethane acrylates such as hyperbranched polyurethane acrylate with highly rigid hyperbranched cores and polyurethane acrylate branched compounds with different diamines were paperpared. A series of siloxane polymers were paperpared. Different hard coatings were prepared based on the obtained polyurethane acrylates and siloxane polymers. The hard coatings showed a good transmittance as higher than 90 % and the pencil hardness was higher than 5H. The hardness improvement mechanism was discussed.