Viscosity index improvers with dispersant properties prepared by reaction of lithiated hydrogenated copolymers with substituted aminolactams
US4402844A · kind A · utility
17Cited by
6References
22Claims
0Family size
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Key dates
| Filing date | Oct 23, 1981 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Oct 23, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2227/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Nitrogen-containing copolymers useful as viscosity index improvers with dispersing characteristics are prepared by the reaction of lithiated hydrogenated conjugated diene-monovinylarene copolymers with substituted aminolactams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.