Patent ID: 7135229

Claim:
Radiation-curable composition comprising: (A) a urethane (meth)acrylate oligomer comprising an alkyd backbone, said alkyd backbone being derived from a polyester, said polyester having pendant ester groups protruding off of a main polymer chain of ester linkages, said pendant ester groups being derived from a compound selected from the group consisting of coconut oil, palm Kernel oil, and hydrogenated varieties of unsaturated oils or fatty acids having an Iodine value below 100 centigrams Iodine I gram sample; (B) a reactive diluent; and (C) a photoinitiator wherein said composition, when cured, has a hydrolysis resistance of less than 30% loss in equilibrium modulus after 30 days exposure at 85° C. and 85% relative humidity.