| 摘要 |
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 an aryl group, preferably a phenyl group, or an acryloyloxy group or a linear or branched C1-C12 alkyl group; R9 and R10 are identical or different and are a hydrogen atom or a linear or branched C1-C12 alkyl group; n is an integer equal to 0, 1 or 2; when n is equal to 0, formula I is chosen from 9-fluorenone and derivatives thereof; when n is equal to 1, either Y is a methylene group or a CHER11, and R11 is a hydrogen or a halogen atom or OH or C(=O)R9 or C(=O)OR10 or a linear or branched C1-C12 alkyl group, or Y and X4 or Y and X5 together form an aryl, preferably phenyl, group; when n is equal to 2, Y is a methylene group.
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