| abstract |
Photoinitiators having one or more ethylenically unsaturated bonds and one or more photo-initiating functional groups in the molecule are provided, in which the ethylenically unsaturated bond is at least selected from an acrylamide group, an acrylate group, a vinyl group, an allyl group and a maleimide group ect., and the photo-initiating functional groups are benzophenone compounds having specific structures. These photoinitiators have good compatibility with common monomers, give low odor and low bleeding out when used in photopolymerizable resin compositions and show high sensitivity to long wavelength rays. |