Patent ID: 11872548
Assignee: VERSALIS S.P.A.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 7:
8. The catalytic system for the (co)polymerization of conjugated dienes according to claim 7, wherein said compounds or mixtures of compounds (b3) are selected from organic compounds of aluminum or boron, including those represented by the following general formulae:

[(RC)WH4-W]·[B(RD)4]—; B(RD)3; Al(RD)3; B(RD)3Pyr; [Ph3C]+·[B(RD)4]—;

[(RC)3PyrH]+·[B(RD)4]—;

[Li]+·[B(RD)4]—; [Li]+·[Al(RD)4]—

wherein said element M′ different from carbon includes said Al atom or said B atom, w is an integer ranging from 0 to 3, each RC group independently represents an alkyl group or an aryl group having from 1 to 10 carbon atoms and each RD group independently represents an aryl group partially or totally fluorinated, having from 6 to 20 carbon atoms, and Pyr represents a pyrrolyl radical optionally substituted.