| 摘要 |
What is described herein is a radiation curable coating composition comprising: A. An oligomer of Formula I: <IMAGE> (I) wherein: R1 is hydrogen or methyl; and Y is a divalent urethane residue; and B. a copolymerizable ultra-violet light absorber which is a copolymerizable (2-cyano-3,3-diphenylacryloxy) alkylene acrylic acid ester of Formula IV: <IMAGE> (IV) where (Ar)1 and (Ar)2 are aromatic carbocylic nuclei of the benzene and naphthalene series; X is C2-C17 alkylene, unsubstituted or substituted; and Z is a copolymerizable radical selected from acryloyl, alkylacryloyl, acryloxyalkyl, acryloxyhydroxyalkyl, or alkylacryloxyhydroxyalkyl, having from C3-C12 carbon atoms. Preferably the coating composition contains a vinyl monomer, such as N-vinyl-2-pyrrolidone or an acrylic acid ester, which is copolymerizable with the oligomer. The process for curing the composition also is disclosed.
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