Copolymers usable as multifunctional additives for lubricants and lubricating compositions containing said copolymers
US5366649A · kind A · utility
3Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Jun 15, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Modified copolymers usable as additives for lubricants and having antiwear and viscosity index-improving properties are prepared by the modification of ethylene-propylene copolymers or ethylene-propylene-diene terpolymers in such a was as to fix the sulphur and phosphorus. Such modified copolymers contain 0.2 to 2% phosphorus, and 0.4 to 4% sulphur and are used in a lubricating composition at a rate of 0.25 to 10%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.