Catalyst systems for polymerizations at high temperatures
US4681924A · kind A · utility
4Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1982 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Dec 29, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymerization of ethylene and a C.sub.3 -C.sub.20 alpha-monoolefin at high temperature gives a low density polyethylene having a density of between 0.91 and 0.93 g/cc. The copolymerizations are accomplished with a catalyst made by co-comminuting an anhydrous magnesium halide, an anhydrous aluminum halide, a titanium compound, and at least one electron donor, and a cocatalyst comprising a synergistic mixture of an alkyl aluminum chloride and an oxygen-containing aluminum compound having oxygen attached to at least one aluminum valence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.