Grafted polymer with soot handling properties
US10822569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2018 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | May 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present disclosure relates to viscosity index modifiers that have dispersant properties and lubricating oil compositions comprising said viscosity index modifiers. The viscosity index modifier is the reaction product of an acylated olefin copolymer, a polyamine, and a dicarboxylic acid or anhydride thereof that can react with a free primary amine of the polyamine to form a ring moiety. The disclosure also relates to the use of lubricant compositions comprising the viscosity index improvers of the disclosure for improving the soot or sludge handling characteristics of an engine lubricant composition, while minimizing the deterioration of engine seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.