Hydroxypolyamide gel forming agents
US9505882B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Mar 14, 2016 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Mar 14, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Hydroxypolyamides, hydroxypolyamide products, and post-hydroxypolyamides are disclosed as gel forming agents. Hydroxypolyamides and post-hydroxypolyamides are prepared from known methods. Hydroxypolyamide products are produced from a modified polymerization procedure which utilizes strong base for deprotonation of ammonium salts from the esterification of stoichiometrically equivalent polyacid:polyamine salts. The hydroxypolyamide products are capable of gel formation at lower concentrations than hydroxypolyamides and post-hydroxypolyamides from the known methods of preparation, and are therefore superior gel forming agents.
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