Polyester viscosity index improver
US5314634A · kind A · utility
6Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1989 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Mar 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2209/107
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a polyester based on dimeric fatty acid, a glycol without hydrogen atoms at an alpha carbon atom in which a C3-C12 monoalcohol chainstopper is present and which contains approximately equivalent quantities of acid and alcohol groups. Preferably the dimer acid contains 36 carbon atoms and the monoalcohol is a branched chain C6-C10 alkanol. The invention also provides lubricant compositions comprising 30-2% (w.w.) of the polyester and 70-98% (w.w.) of an synthetic lubricant base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.