Dialkyl fumarate - vinyl acetate copolymers useful as dewaxing aids
US4956492A · kind A · utility
4Cited by
5References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 19, 1986 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Dec 19, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers of dialkyl fumarate and vinyl acetate having Specific Viscosities of at least 2.5 at 2% polymer concentration in xylene at 40.degree. C., and wherein at least 50 wt. % of said alkyl groups are C.sub.20 to C.sub.24, are useful as dewaxing aids, particularly in propane dewaxing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.