Lubricant composition containing a dispersant which is a condensation product of a copolymer, polyamine and a polycarboxylic acid
US4120803A · kind A · utility
4Cited by
7References
18Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 15, 1976 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Nov 15, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mono-alkenes, aliphatic conjugated dienes and unsaturated fatty acids or esters thereof copolymerize with a Friedel-Crafts catalyst to yield a copolymer containing carboxylic acid or ester groups which are reacted with a polyamine to amidate the carboxyl group leaving free amine groups. The free amine groups are reacted with polycarboxylic acids to form inter- and intra-molecular bridged polyamides. These compounds are effective ashless dispersants in lubricating oil and have detergency properties in distillate fuels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.