Curable coating compositions and process for the production of scratch-resistant coatings on plastics

Abstract

Abstract 1. A curable coating composition based on olefinically unsaturated polysiloxanes, wherein the olefinically unsaturated polysiloxane is a polycondensate of a) from 50 to 95 mole% of an olefinically unsaturated silane of the general formula R**1 -Si(OR**2 )3 where R**1 is vinyl or a C2 -C8 -alkyl acrylate or methacrylate radical bonded to the Si atom via a C-Si bond and R**2 is hydrogen or a saturated hydrocarbon radical of 1 to 4 carbon atoms, b) from 5 to 50 mole% of a saturated silane of the general formula see diagramm : EP0062899,P6,F2 where R**2 has the above meanings and R**3 and R**4 are identical or different and each is a saturated hydrocarbon radical of 1 to 6 carbon atoms or an unsubstituted or C1 -C4 -alkyl-substituted aromatic hydrocarbon radical, and c) 0 to 25 mole% of an epoxide-containing silane with 2 or more hydroxyl or alkoxy groups, with 2 or more hydroxyl or alkoxy groups, with the proviso that the sum of the percentages of a), b) and c) is 100.

Inventors

• 👤 Klaus-Peter Dr. Jaeckel

Bibliographic Details