Process for modifying the viscosity of copolymers of ethylene and unsaturated carboxylic acids
US5214108A · kind A · utility
7Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Jul 10, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The viscosity of copolymers of a) ethylene, b) C.sub.1 -C.sub.8 acrylates, C.sub.1 -C.sub.8 methacrylates, or vinyl esters of C.sub.1 -C.sub.8 carboxylic acids, and c) at least one alpha, beta-unsaturated carboxylic acid of 3-12 carbon atoms selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and monoesters of dicarboxylic acids is increased, while maintaining gel content at a level of less than 3%, by treatment with a mixture of an organic peroxide and a chromium (III) salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.