Detergent composition
AssigneeLever Brothers Company, Division of Conopco, Inc.
InventorsRobert S. Lee, Tom M. F. Salmon
Life of this patent
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Abstract
Aqueous detergent compositions giving good mildness, good lather volume and lather creaminess contain acyl isethionate, a zwitterionic detergent which is a quaternised amino acid, usually a betaine, and another anionic detergent. Proportions and ratios are specified and alkanolamides are absent or limited in amount. Incorporation of the additional anionic detergent, such as ether sulphate, has surprisingly little adverse effect and provides economy.
Claims15
A detergent composition in the form of an aqueous liquid or gel comprising 10% to 50% by weight of a detergent mixture which comprises
- (a) 10 to 60% by weight of the detergent mixture of a fatty acyl isethionate of formula
- R--CO.sub.2 --CH.sub.2 CH.sub.2 --SO.sub.3 M
- where R is an alkyl or alkenyl group of 7 to 21 carbon atoms and M is a solubilising cation such as sodium, potassium, ammonium or substituted ammonium;
- (b) 10 to 80% by weight of the detergent mixture of a zwitterionic detergent which has a hydrophilic head group containing a quaternary nitrogen atom and at least one acid group,
- (c) 10 to 55% by weight of the detergent mixture of a further anionic detergent other than acyl isethionate,
- wherein the amount by weight of the fatty acyl isethionate (a) is not more than three times the amount by weight of the zwitterionic detergent (b), the total of (a) and (b) is from 45 to 90% by weight of the detergent mixture, and the composition is sufficiently free of alkanolamide detergents that the amount by weight of alkanolamide is not more than one quarter the amount of the zwitterionic detergent (b).
Dependencies are inferred from the claim text.