Radiation-curing compositions

A description is given of radiation-curing compositions comprising (A) linear organopolysiloxanes containing (meth)acryloxy groups, of the general formula R1aR3-aSiO(R2SiO)c[R2Si-Y-SiR2O(R2SiO)c]dSiR3-bR1b (I), in which R can be identical or different and is a monovalent, substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms per radical, which is free from terminal aliphatic carbon-carbon multiple bonds, R1 is a radical of the formula, where z is an integer whose value is from 1 to 10, R2 is a hydrogen atom or a methyl radical, R3 is a linear or branched alkylene radical having 1 to 6 carbon atom(s) per radical, and R4 is a linear or branched alkylene radical having 1 to 6 carbon atom(s) per radical, Y is a divalent organic radical which is free from terminal aliphatic carbon-carbon multiple bonds, a is 0 or 1, b is 0 or 1,with the proviso the sum a+b per molecule is 1 or 2, on average from 1.3 to 1.9, c is an integer whose value is from 1 to 1000, and d is 0 or an integer whose value is from 1 to 10, and (B) photosensitizers.