Process for gelling aqueous media, use of copolyesters as gelling agents for aqueous media and new gelling copolyesters for aqueous media
US6503982B2 · kind B2 · utility
1Cited by
2References
17Claims
0Family size
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Key dates
| Filing date | Sep 6, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Sep 6, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6886
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Process of gelification of aqueous medium with a copolyester oligomer comprising essentially oxyalkylenated or ocycycloalkylenated or polyoxyalkylenated dicarboxylate units at least 35 mole % of said units being similar units of which the correspondent homolymer is crystalline, at least 7 mole % of said units being bearing units of hydrophobic(s) sulfonated functions, the molecular mass in weight of said copolyesters oligomer being less than 20,000. For example: the terephtalic polyoxyethylenated sulfonated oligomers of high content of polyethyleneterephtalate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.