| 摘要 |
The invention provides a photo-crosslinkable composition comprising: a base polymer selected from olefin homopolymers or copolymers, or mixtures thereof; a cross-linking agent; and a photoinitiator; characterized in that said photoinitiator is a compound with formula I: in which: X1 to X8 respectively represent CR1 to CR8; R1 to R8 are identical or different and represent a hydrogen atom or a halogen atom or OH or C(═O)R9 or C(═O)OR10 or SO3− or an aryl group, preferably a phenyl group, or an acryloyloxy group or a linear or branched C1-12 alkyl group; R9 and R10 are identical or different and represent a hydrogen atom or a linear or branched C1-12 alkyl group; n represents an integer equal to 0, 1 or 2; when n equals 0, formula I is selected from 9-fluorenone and its derivatives; when n equals 1; either Y represents a methylene group or a CHR11 group, R11 representing a hydrogen atom or a halogen atom or OH or C(═O)R9 or C(═O)OR10 or a linear or branched C1-12 alkyl group; or Y and X4 or Y and X5 together form an aryl group, preferably phenyl; when n equals 2, Y represents a methylene group.
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