| 摘要 |
Materials which are cross-linkable by ultraviolet radiation under atmospheric oxygen and are based on (meth)acrylate copolymers having a K value of from 10 to 100 are obtained by free radical polymerization, in the presence or absence of a solvent, of a) from 5% to 97.4% by weight of isoamyl acrylate and/or isoamyl methacrylate, b) from 9% to 89.9% by weight of (methacrylates whose homopolymers have a glass transition temperature below -30 DEG C., c) from 2.5% to 30% by weight of alpha , beta -monoolefinically unsaturated compounds whose homopolymers have a glass transition temperature above -30 DEG C., d) from 0% to 10% by weight of monoolefinically unsaturated acids and/or their anhydrides and e) from 0% to 20% by weight of further olefinically unsaturated monomers having one or more of the following functional groups: hydroxyl, amide, epoxide, ether, ester, urethane, urea, primary, secondary and tertiary amine and ether groups, and f) from 0.1% to 5% by weight of a copolymerizable benzophenone derivative or acetophenone derivative, the sum of the percentages by weight X (=a+b+c+d+f) being 100 in each case.
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