China Petroleum & Chemical Corporation
Olefin polymerization catalyst comprising cyclotriveratrylene and derivatives thereof

Abstract:

The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M.sub.1, M.sub.2, M.sub.3, M.sub.4, M.sub.5, M.sub.6, M.sub.1', M.sub.2', M.sub.3', M.sub.4', M.sub.5' and M.sub.6' are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, --R.sub.1 and --OR.sub.2, wherein R.sub.1 and R.sub.2 are each independently a C.sub.1-C.sub.10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C.sub.1-C.sub.10 alkoxy and heteroatoms; and wherein, when among M.sub.1-M.sub.6 and M.sub.1'-M.sub.6', any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R.sub.1 and --OR.sub.2, the two adjacent groups may optionally be linked to form a ring, with a proviso that M.sub.1, M.sub.2, M.sub.3, M.sub.4, M.sub.5, M.sub.6, M.sub.1', M.sub.2', M.sub.3', M.sub.4', M.sub.5' and M.sub.6' are not simultaneously hydrogen. ##STR00001##