Impregnated polymerization catalyst, process for preparing, and use for ethylene copolymerization
US4302565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1979 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Feb 16, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst formed from selected organo aluminum compounds and a precursor composition of the formula EQU Mg.sub.m Ti.sub.l (OR).sub.n X.sub.p [ED].sub.q wherein ED is a selected electron donor compound PA1 m is .gtoreq.0.5 to .ltoreq.56 PA1 n is 0, 1 or 2 PA1 p is .ltoreq.2 to .gtoreq.116 PA1 q is .gtoreq.2 to .ltoreq.85 PA1 R is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, and PA1 X is selected from the group consisting of Cl, Br, I or mixtures thereof, PA1 which catalyst is in particulate form and impregnated in a porous inert carrier material. A process for preparing such catalyst. A process for using said catalyst to readily prepare ethylene copolymers having a density of about .gtoreq.0.91 to .ltoreq.0.94 and a melt flow ratio of .gtoreq.22 to .ltoreq.32 in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti. Novel polymers and molded articles are prepared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.