Slurry polymerization of crosslinked maleic anhydride-alkyl vinyl ether copolymers in a solvent system comprising a carboxylic acid ester and a saturated hydrocarbon
US5034488A · kind A · utility
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Key dates
| Filing date | Jan 11, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Jan 11, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerization process is described herein for making crosslinked copolymers of maleic anhydride and an alkyl vinyl ether characterized in that polymerization is carried out in a solvent system which is a mixture of a carboxylic acid ester and a saturated hydrocarbon, preferably a mixture of ethyl acetate and cyclohexane in the weight ratio of about 35% to 55% ethyl acetate and 45% to 65% cyclohexane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.