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

Claim 4:
5. The catalytic system for the (co) polymerization of conjugated dienes according to claim 4, wherein said organo-oxygenated compounds (b2) are selected from aluminoxanes having general formula (IV):

(R6)2—Al—O—[—Al(R7)—O—]p—Al—(R8)2  (IV)

wherein said element M′ different from carbon includes said Al atoms, R6, R7 and R8, identical or different, represent a hydrogen atom, a halogen atom; or are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, or aryl groups, said groups being optionally substituted with one or more atoms of silicon or germanium; and p is an integer ranging from 0 to 1000.