Catalyst for the production of olefin polymers
US6320005A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1999 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst precursor having the formula: EQU A.sub.q ML.sub.n wherein each A has the formula: ##STR1## PA1 M is a metal selected from the group consisting of Group 3 to 13 elements and Lanthanide series elements; PA1 each L is a monovalent, bivalent, or trivalent anion; PA1 X and Y are each heteroatoms; PA1 Cyclo is a cyclic moiety; PA1 each R.sup.1 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements, and two or more adjacent R.sup.1 groups may be joined to form a cyclic moiety; PA1 each R.sup.2 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements, and two or more adjacent R.sup.2 groups may be joined to form a cyclic moiety; PA1 Q is a bridging group; PA1 each m is independently an integer from 0 to 5; PA1 n is an integer from 1 to 4; PA1 q is 1 or 2; PA1 and when q is 2, the A groups are optionally connected by a bridging group Z is provided. The catalyst precursor may be made by reacting an organometal compound with a heteroatom-containing ligand. The catalyst precursor, when combined with an activating cocatalyst, is useful for the polymerization of olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.