Abrasion resistant siloxane coatings containing ceria

Details Abrasion resistant siloxane coatings containing ceria Abrasion resistant siloxane coatings containing ceria

C - Chemistry, Metallurgy

09

D

C09D 183/06 (2006.01) B32B 27/08 (2006.01) C08J 7/04 (2006.01) C09D 183/04 (2006.01) C09D 201/00 (2006.01)

Patent

CA 2043453

ABSTRACT OF THE DISCLOSURE Siloxane organic hybrid polymers and a method of making them by condensation polymerization are disclosed, along with rigid plastic transparencies coated with such polymers. The present invention involves reaction of an organoalkoxysilane in the presence of an organic film-forming polymer, wherein cerium oxide is preferably incorporated in the reaction mixture for the attenuation of ultraviolet radiation. To combine the mechanical strength and stability of inorganic materials with the flexibility and film-forming ability of organic materials, organic-inorganic hybrid polymers in accordance with the present invention are prepared by hydrolytic condensation polymerization, preferably acid-catalyzed, of an organoalkoxysilane in the presence of an organic film-forming polymer such as polyvinylpyrrolidone. Cerium oxide is incorporated into the polymer for attenuation of ultraviolet radiation, for the protection of the underlying substrate, such as a plastic transparency, preferably acrylic or polycarbonate.

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