Carbohydrate-derived surfactants and their precursors
US5710332A · kind A · utility
1Cited by
5References
3Claims
0Family size
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Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C309/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the manufacture of N,N dialkylglycamine compounds of general formula R.sub.2 NR.sub.1 R.sub.3 (I) by reacting a secondary amine of general formula R.sub.2 NHR.sub.3 (II) in which R.sub.2 is a straight or branched chain alkyl or hydroxyalkyl group having from 1 to 4 carbon atoms and R.sub.3 is a residue from a monosaccharide, with an alkali metal or alkaline earth metal aliphatic sulphate, R.sub.1 SO.sub.4 M, in which R.sub.1 is a straight or branched chain alkyl or alkenyl group having from 8 to 24 carbon atoms. The betaine, suphobetaine and N-oxidised derivatives of (I) are provided for use as mild surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.