Viscosity index improver soluble in synthetic poly(.alpha.-olefin) lubricants
US4418234A · kind A · utility
9Cited by
14References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Dec 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2205/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydrogenated completely random conjugated diene/monovinylarene copolymers with a conjugated diene content above about 50 weight percent, monovinylarene content below about 50 weight percent, vinyl unsaturation (normalized) at least about 25 weight percent, block polymonovinylarene below about 5 weight percent, and molecular weight M.sub.n in the range of about 30,000-200,000, are soluble in synthetic poly(.alpha.-olefin) lubricating oils providing therein effective viscosity index control, pour point, and shear loss at low concentrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.