Process for making dispersant viscosity index improvers
US5486563A · kind A · utility
21Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Star polymers having polymeric arms of a hydrogenated conjugated diene and substantially smaller polymeric arms of an alkyl methacrylate are efficiently reacted with amines after preparation of a concentrate of the polymer in a lubricating oil to form a dispersant viscosity index improver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.