Radiation hardenable vinylic/siloxane resin binder for - paints

摘要

UNSATURATED SILOXANE & VINYLIC COPOLYMER AS COATINGS HARDENABLE BY RADIATION. M1-. (a) Olefinically alpha, beta unsaturated siloxane formed from a siloxane containing at least 2 functional groups, chosen from -OH or hydrocarbonoxy groups reacted with a hydroxy-ester of an olefinically alpha, beta unsaturated carboxylic acid, and (b) a copolymer of olefinically alpha, beta unsaturated vinylic monomers are used as coating compositions hardenable by radiation. Vinylic monomers may be added to the composition. Coating with good weather resistance for wood, metal or solid polymers. The siloxane may have 3 to 18, preferably 3 to 12 Si atoms, and contains the links -Si-O-Si or -C-O-Si-. The hydrocarbonoxy groups are preferably alkoxy gps. with 1 to 4C atoms particularly -OCH3. The hydroxy ester is preferably an ester of acrylic or methacrylic acid and a dihydric alcohol of 2 to 8C atoms.