Dispersant viscosity modifiers based on maleic anhydride-styrene copolymers
US8168574B2 · kind B2 · utility
2Cited by
18References
19Claims
0Family size
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Key dates
| Filing date | Apr 18, 2005 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Oct 4, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/09
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An interpolymer composition comprising monomer-derived units of (i) at least one of an aliphatic olefin containing from 2 to 30 carbon atoms and a vinyl aromatic monomer, and (ii) at least one alpha, beta-unsaturated acylating agent; wherein a portion of said acylating agent monomers is esterified and wherein a portion of said acylating agent monomers is condensed with at least one aromatic amine, provides good viscosity modification and dispersancy performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.