Process for preparing quaternary ammonium salts
US4675180A · kind A · utility
16Cited by
10References
3Claims
0Family size
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Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/416
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## in which R.sub.1 is long-chain alkyl, R.sub.2 and R.sub.3 are each lower alkyl and X.crclbar. is an anion, are prepared by quaternizing amines of the formula R.sub.1 R.sub.2 R.sub.3 N with ethylene oxide in the presence of acid. This gives the quaternary compounds in virtually quantitative yield. The compounds are particularly suitable for use in hair cosmetics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.