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US 5,344,712 AGranted
Abrasion resistant siloxane coatings containing ceria
AssigneePPG Industries, Inc.
InventorsJohn D. Basil, Chia-Cheng Lin
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Abstract
Siloxane organic hybrid polymers and a method of making them by condensation polymerization reaction of organoalkoxysilane in the presence of organic film-forming polymers are disclosed wherein cerium oxide is incorporated for the attenuation of ultraviolet radiation.
Claims6
An abrasion resistant and ultraviolet radiation resistant coated plastic transparency comprising:
- a. a rigid transparent plastic substrate;
- and
- b. a siloxane coating formed from an organoalkoxysilane of the general formula R.sub.x Si(OR').sub.4-x wherein R is selected from the group consisting of alkyl and acrylic-functional groups, R' is selected from the group consisting of methyl, ethyl, propyl and butyl, and x is at least one and less than 4, polyvinylpyrrolidone, cerium oxide and sodium acetate.
An article according to claim 8, wherein the ratio of silane to polyvinylpyrrolidone is about 30.
Dependencies are inferred from the claim text.