Haze free oil additive compositions containing polymeric viscosity index improver and process for producing said compositions
US4069162A · kind A · utility
9Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1975 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Nov 3, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Oil compositions comprising a lubricating oil and an oil-soluble hydrocarbon polymeric viscosity index improver such as ethylene-propylene copolymers are substantially haze-free when said composition contains an anti-hazing amount of an oil-soluble strong acid containing a hydrogen dissociating moiety which has a pK of less than about 2.5, e.g. a C.sub.25 to C.sub.70 hydrocarbyl substituted sulfonic acid. The invention also relates to the process for preparing said compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.