Amphoteric surfactants having multiple hydrophobic and hydrophilic groups
US5789371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Apr 22, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D1/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
According to the invention, an improved class of amphoteric surfactants having improved surfactant properties charaterized as mild and environmentally benign has been provided comprising a compound of the general formula: ##STR1## wherein R independently represents a C.sub.5 to C.sub.22 alkyl or acyl (RCO--); R.sub.1 represents a C.sub.1 to C.sub.6 alkyl; R.sub.2 independently represents --O--; R.sub.3 represents a C.sub.2 to C.sub.20 alkylene, arylene, or alkylarylene and M is Na, K, NH.sub.4, an organic base, or hydrogen. In addition to the novel compounds per se, the invention also provides new methods for the preparation of the amphoteric gemini surfactants as well as improved synergistic compositions that are obtained when the amphoteric geminis are blended with other surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.