Modified polyisobutylene succinimide dispersants having improved seal, sludge, and deposit performance
US6770605B1 · kind B1 · utility
4Cited by
11References
25Claims
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Key dates
| Filing date | Sep 11, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Sep 11, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition suitable for reducing sludge and degradation of elastomer seals in engines comprises an oil of lubrication viscosity and a minor amount of a sludge preventing/seal protecting nitrogen containing dispersant, which is a reaction product of a hydrocarbyl-substituted succinic acylating agent having a limited amount of low molecular weight substituent; and a polyamine or condensed polyamine containing less than 20 mole percent of polyamine components of 6 or fewer nitrogen atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.