Ethylenically unsaturated oligomers

摘要

Disclosed are functional polyallophanate oligomers comprising ethylenically unsaturated groups and polymer stabilizer groups selected from hindered amine light stabilizers, ultraviolet light absorbers, antioxidants and dihydrocarbylhydroxylamines. The ethylenically unsaturated groups and the polymer stabilizer groups are bound to the polyallophanate oligomers through allophanate and/or carbamate groups. The polyallophanate oligomers are useful in curable coatings, inks and varnishes. The present polyallophanate oligomers are derived from a) organic polyisocyanates, b) compounds containing at least one isocyanate reactive group and at least one ethylenically unsaturated group and c) polymer stabilizers containing at least one isocyanate reactive group.

主权项

1. An oligomer containing one or more ethylenically unsaturated groups bound through allophanate groups and/or carbamate groups and containing at least one polymer stabilizer group covalently bound through allophanate groups and/or carbamate groups, wherein the oligomer is derived from a) one or more organic polyisocyanates, b) one or more compounds containing at least one isocyanate reactive group and at least one ethylenically unsaturated group and c) one or more compounds, containing at least one isocyanate reactive group and the at least one polymer stabilizer group, selected from the group consisting of H1-H11, UV1-UV7, AO1-AO3, N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N-dihexylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-didodecylhydroxylamine, N,N-ditetradecylhydroxylamine, N,N-dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine, N-hexadecyl-N-tetradecylhydroxylamine, N-hexadecyl-N-heptadecylhydroxylamine, N-hexadecyl-N-octadecylhydroxylamine, N-heptadecyl-N-octadecylhydroxylamine, N-methyl-N-octadecylhydroxylamine and N,N-di(C16-C18alkyl)hydroxylamine.