Ethylene-hydrocarbon copolymeric viscosity improvers containing color and stability improvers
US4110235A · kind A · utility
2Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Mar 30, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The color and viscosity stability of copolymeric .alpha.-olefin viscosity index improvers and of oils containing same are improved by the incorporation therein of minor amounts of N,N'-bis(2-hydroxy-5-alkylbenzyl).alpha.-.OMEGA.-diaminoethane wherein the alkyl group is a C.sub.4 to C.sub.30 alkyl group and the basic metal salts thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.