Process for preparing ethylene-higher olefin copolymer oils with Ziegler-Natta catalyst in mixed aliphatic-aromatic solvent
US4855526A · kind A · utility
13Cited by
8References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Low viscosity copolymers of ethylene and higher olefins are prepared with Ziegler-Natta catalysts in the presence of an aliphatic-aromatic solvent mixture, e.g., 1:1 (by volume) of hexane:toluene. The copolymerization can be conducted without hydrogen and subsequent cracking or dewaxing steps are not necessary to obtain oils with high VI and low pour point suitable for use as basestocks, blendstocks and as shear stable VI improvers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.