Sulfurized polyisobutylene based wear and oxidation inhibitors
US7414013B2 · kind B2 · utility
3Cited by
30References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Sep 13, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfurized olefin compositions and compounds of the formula:wherein R1 is hydrogen or methyl; X is sulfur or oxygen; m is an integer from 1 to 9; and n is 0 or 1, and when n is 0 then R1 is methyl, and when n is 1 then R1 is hydrogen are disclosed. The resulting compounds are particularly the polyisobutyl-1,2-dithiole-4-cyclopentene-3-thione compounds and derivatives are useful in lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.