Asphaltene dispersants - inhibitors
US5021498A · kind A · utility
31Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An asphalt/asphaltene dispersant comprising an admixture of polymer A and polymer B ranging from 100 to 10 weight percent A to from 10 to 100 weight percent B. Wherein polymer A is an alkyl substituted phenol-formaldehyde liquid resin having a weight average molecular weight ranging from about 1000 to about 20,000 and an alkyl substituent containing from 4 to 24 carbon atoms, with alkyl substituent may be linear or branched alkyl group. Polymer B is a hydrophilic-lipophilic vinylic polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.