Water-in-oil emulsions with anionic groups, compositions, and methods
US6951642B2 · kind B2 · utility
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20References
20Claims
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Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-in-oil emulsions, compositions, and methods that include a vinyl polymer having a pKa of less than 4 that includes anionic group-containing side chains and alkyl-Y-containing side chains, wherein Y is O or NR, wherein R is hydrogen or methyl, and wherein the alkyl group of the alkyl-Y-containing side chain has at least 4 carbon atoms on average in a cyclic, branched-, or straight-chain configuration and optionally including one or more heteroatoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.