High-concentration aqueous solutions of betaines or amine oxides
US7033989B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2003 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a composition and a method for preparing high-concentration aqueous solutions of betaines or amine oxides which comprise a water-soluble carbohydrate. The high-concentration aqueous solutions of the present invention are pumpable, viscous liquids which are self preserving and remain storage stable for long periods without any bacterial decomposition. The high-concentration aqueous solutions of the present invention are prepared by adding a water-soluble carbohydrate such as cyclodextrins or dextrans to an aqueous solution of the betaine or amine oxide and concentrating the aqueous solution to provide the high-concentration aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.