Ethylene .alpha.-olefin copolymer substituted mannich base lubricant dispersant additives
US5433874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1994 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Sep 28, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl-moiety of the aromatic compounds is derived from a mixture comprising at least one ethylene alpha-olefin copolymer of 300 to 20,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation and (ii) at least one polyalkene derived from at least one C.sub.2 to C.sub.20 alkene, the polyalkene having a number average molecular weight of at least about 900. The Mannich Base condensates of this invention are useful as dispersants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.