High-concentration aqueous ester quat solutions

US5811385A · kind A · utility

Inventors

• Oliver Eyrisch · Essen, DE
• Gunther Hertel · Altötting, DE

Key dates

• Filing date: Apr 23, 1997
• Grant date: Sep 22, 1998
• Expiry date: Apr 23, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The ester quat solutions described contain at least 70% by weight, based on the solution, of at least one ester quat compound of the formula below ##STR1## where RCO is an aliphatic acyl radical having 6 to 22 carbon atoms, R' is H or a C.sub.1 to C.sub.22 alkyl radical, R.sup.1 is a methyl or ethyl radical, R.sup.2 is a C.sub.1 to C.sub.8 alkyl radical, R.sup.3 is a C.sub.3 to C.sub.8 alkyl radical and X.sup.- is a halide, alkyl carbonate, alkyl phosphate or an alkyl sulfate, where alkyl is methyl or ethyl. They are prepared by quaternizing corresponding carboxylic acid alkanolamine esters with, preferably, methyl chloride or dimethyl sulfate. The aqueous solutions described are advantageously suitable for preparing laundry detergents and cosmetics.