Process for making quaternized vinylpyridine carboxylate polymers using suspension polymerization
US6201046A · kind A · utility
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6Claims
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Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3776
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to the preparation of stable, quaternized vinylpyridine carboxylate homo-, co- and ter-polymers in high yield and purity, which polymers are useful as dye transfer inhibitors and polymers complexable with active agrochemical, pharmaceutical or cosmetic agents for controlled release thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.