Nitrogen containing dispersant-viscosity improvers
US6492306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Apr 25, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition comprising a hydrocarbon polymer having attached thereto pendant groups Aa and Bb wherein each A is independently selected from members of the group consisting of:groups of the formula and each B is independently selected from members of the group of formula: wherein each X is independently O, S, or NRb, and each Z is independently a group of the formula Ra is an ethylene group, a propylene group, which groups optionally have hydrocarbyl or hydroxyhydrocarbyl substituents, or wherein J is H, SH, NH2, or OH, and tautomers thereof; a is 0 or a number ranging from 1 to about 50, and b is a number ranging from 1 to about 30; wherein each of the groups is defined in greater detail herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.