Terpolymers based on .alpha.,.beta.-unsaturated dicarboxylic anhydrides, .alpha.,.beta.-unsaturated compounds and polyoxyalkylene ethers of lower unsaturated alcohols
US5391632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1994 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Jan 6, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2217/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Terpolymers based on .alpha.,.beta.-unsaturated dicarboxylic anhydrides, .alpha.,.beta.-unsaturated compounds and polyoxyalkylene ethers of lower unsaturated alcohols. The present invention relates to terpolymers based on .alpha.,.beta.-unsaturated dicarboxylic anhydrides, .alpha.,.beta.-unsaturated compounds and polyoxyalkylene ethers as defined in claim 1, and also a process for preparing the same as defined in claim 5. The invention likewise relates to a mixture of at least one terpolymer as defined in claim 1 and at least one ethylene-vinyl ester copolymer. The terpolymers of the invention, and mixtures thereof, are used as paraffin inhibitors in crude oils and petroleum products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.