.alpha.-olefin polymerization catalysts
US5756611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Feb 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst useful in the polymerization of .alpha.-olefins comprises the reaction product of an alcohol having the general formula ##STR1## with an organometallic compound having the general formula EQU LM(X).sub.v-1 PA1 wherein Q is --COR.sup.12, --CR"R"(OR.sup.12) and --CR"R"N(R").sub.2 ; PA1 wherein each R" is independently selected from H and R, R is a C.sub.1 to C.sub.12 alkyl group or a C.sub.6 to C.sub.24 aryl group, R.sup.12 is R or a radical of the formula --(CH.sub.2).sub.w --O--(CH.sub.2).sub.y H, w and y being independently selected from 1 to 4; PA1 L is a .pi.-bonded ligand selected from (i.) a cyclopentadienyl or substituted cyclopentadienyl ring; (ii.) a boraaryl ring; (iii) a 1,2-azaborolinyl ring; or (iv.) a 5-membered heterocyclic ring; PA1 M is a Group 3 to 7 metal of the Periodic Table; PA1 v is the valence of M; and PA1 each X is independently selected from halogen or a C.sub.1 -C.sub.6 alkyl group or a C.sub.6 -C.sub.24 aryl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.