| abstract |
The invention relates to a photo-crosslinkable composition comprising: a base polymer chosen from homopolymers or copolymers of olefin, or mixtures thereof; a crosslinking agent, and a photoinitiator, characterized in that the photoinitiator is a compound of formula I: in which: X1 to X8 are respectively CE1 to CE8; R1 to R8 are identical or different and are a hydrogen or halogen atom or OH or C(=O)R9 or C(=O)OR10 or SCO3 or aryl (phenyl preferred) or acryloyl or linear chain or C1-C12 alkyl wiht a branched chain; R9 and R10 are same or different and are hydrogen atom or linear chain or C1-C12 alkyl with a branched chain; n is an integer of zero, one or two; when n is equal to zero, formula I is selected from 9-fluorenone or derivant thereof; when n is equal to one, Y is methylene or CHER11, and R11 is hydrogen atom or halogen atom or ON or C(=O)R9 or C(=O)OR10 or a linear chain or C1-C12 alkyl with a branched chain, also Y and X4 or Y and X5 are formed into aryl together, optimized phenyl; when n is equal to two, Y is mehylene. |