Olefin polymerization catalyst system
US6303719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to an olefin polymerization catalyst composition comprising the product of the combination of an activator, an additive and a transition metal compound which is represented by the formulae: EQU ((Z)XA.sub.t (YJ)).sub.q MQ.sub.n where M is a metal selected from Group 3 to 13 or lanthanide and actinide series of the Periodic Table of Elements; Q is bonded to M and each Q is a monovalent, divalent or trivalent anion; X and Y are bonded to M; X and Y are independently carbon or a heteroatom, provided that at least one of X and Y is a heteroatom, preferably both X and Y are heteroatoms; Y is contained in a heterocyclic ring J, where J comprises from 2 to 50 non-hydrogen atoms, Z is bonded to X, where Z comprises 1 to 50 non-hydrogen atoms; t is 0 or 1; when t is 1, A is a bridging group joined to at least one of X, Y or J, q is 1 or 2; n is the oxidation state of M minus q if Q is a monovalent anion, n is (the oxidation state of M-q)/2, if Q is a bivalent anion or n is (the oxidation state of M-q)/3 if Q is a trivalent anion, optionally R'.sub.m may be bound to Z and /or R".sub.p may be bound to J PA1 the R" groups are independently selected from the group consist…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.