Sulfone copolymeric additive for hydrocarbon oils
US4070295A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Feb 2, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfone copolymeric oil additives having utility as a lubricating oil pour point depressant, viscosity index improver, dispersant, load carrying agent, rust inhibitor and/or antioxidant, or as a cold flow improver for heavy distillates and residual fuels, comprise the hydrocarbon soluble copolymers of an ethylenically unsaturated polar monomer and sulfur dioxide. This sulfone copolymer may contain one or more additional monomers including: C.sub.2 to C.sub.50, preferably at least C.sub.6, substantially linear alpha olefins; C.sub.2 to C.sub.12, preferably C.sub.2 to C.sub.9, cyclic olefins; and, C.sub.4 to C.sub.6 conjugated diolefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.