Unsaturated polyester resin compositions and their use

摘要

UV-curable mixts. (I) contain (A) 40-80 pts. wt. polyester resin component contg. at least one ethylenically unsatd. polyester resin (UP resin), (B) 20-60 pts. wt. copolymerisable monomer(s), (C) 0.1-10 pts. wt. photoinitiator(s) and opt. (D) conventional additives etc. for coating materials. The UP resins in (A) have acid nos. of 0-50 and OH nos. of 10-150, and are obtd. by reacting (a) 35-50 mole% of a carboxylic acid component contg. (a1) 5-35 mole% of the dicyclopentenyl ester of a 1,2-alkene-dicarboxylic acid, (a2) 50-95 mole% fumaric and/or maleic acid and (a3) 0-20 mole% other carboxylic acids and/or anhydrides, with (b) 50-65 mole% of an alcohol component contg. (b1) 75-100 mole% dihydric alcohol(s), (b2) 0-25 mole% monohydric alcohol(s) and (b3) 0-10 mole% at least trihydric alcohol(s).