| 摘要 |
Novel polymeric photocleavable photoinitiators are prepared by the hydrosilation reaction of an organosilicon hydride grafting agent which has a photoinitiating aromatic-aliphatic ketone derivative of at least one organo group, with a polymer having a plurality of unsaturated olefinic or acetylenic sites in the presence of a hydrosilation catalyst. Preferred polymers are butadiene or alkyl substituted butadiene polymers and copolymers and vinyl functional polyorganosiloxanes. The grafting agents have the formula (hv)-R8-R5-H wherein (hv) is a photoinitiating aromatic-aliphatic ketone group, R8 is selected from alkylene, alkenylene, alkylenoxy and oxy groups, and R5 is selected from <IMAGE> the R6 groups are the same or different organo or halo groups and n is an integer.
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