Prepolymerized catalyst and use thereof
US5244990A · kind A · utility
32Cited by
3References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jan 7, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A prepolymerized olefin polymerization catalyst, its preparation, and use are disclosed. The catalyst is prepared by contacting a solid particulate transition metal-containing olefin polymerization catalyst with an olefin in a confined zone under suitable conditions wherein the prepolymerization is conducted under conditions such that the olefin is added to the confined zone at a rate such that the pressure in the confined zone increases no more than about 0.5 psig/sec. during the olefin addition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.