Ethylene polymer useful as a lubricating oil viscosity modifier E-25
US4666619A · kind A · utility
32Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Oct 9, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2205/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ethylene ter- or tetrapolymer useful as a viscosity modifer and a process for preparing the polymer. The polymer comprises ethylene, an alpha-olefin, a non-conjugated diene and, optionally, a cationically polymerizable monoolefin. The polymerization catalyst comprises a Ziegler catalyst in conjunction with a cationic polymerization catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.