Acryloxypropyl - or methacryloxypropyl - groups containing siloxane - oligomers, processes for their preparation and their use

摘要

Mixture of lacunar and cyclic siloxane - oligomers of the general formulae i and ii, in which the substituents r of 3 - methacryloxypropyl - or 3 - acryloxypropyl - groups - and methoxy, ethoxy - and / or propoxy - groups and, if appropriate, alkyl -, fluoroalkyl -, - isoalkyl, cycloalkylmit 1 to 18 c - atoms and / or aryl - groups having 6 to 12 c - atoms to a silicon - atom at most one 3 - methacryloxypropyl - or 3 - acryloxypropyl - group is bound and the degree of oligomerization of compounds of the general formula i in the range from 2 & m & 25 and the for compounds of the general formula ii in the range from 2 ≦ n ≦ 8 and the quotient of the molar ratio of si / alkoxy - grouping is ≧ 0,5.