Alkyl-substituted hydroxyaromatic compounds useful as a multifunctional viscosity index improver
US5268115A · kind A · utility
25Cited by
14References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil-soluble alkyl substituted hydroxyaromatic compound, wherein the alkyl-moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of greater or above 25,000 to about 5000,000 number average molecular weight, said copolymer containing from 30 to 80 weight percent ethylene and wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as multifunctional viscosity index improvers for oleaginous compositions, particularly lubricating oil compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.