Process for the preparation of cross-linked maleic anhydride copolymers
US5661221A · kind A · utility
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11Claims
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Key dates
| Filing date | Dec 18, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Dec 18, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2335/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing a cross-linked alkyl vinyl ether/maleic anhydride copolymer having improved linear viscoelastic properties desired in oral care preparations, wherein the cross-linking of an alkyl vinyl ether/maleic anhydride copolymer with a polyol compound is carried out at a temperature of from about 50.degree. to about 90.degree. C. and the cross-linked product is recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.