Lever Brothers Company

David J Edge

Appaya R Naik

Peter Winterbotham

Melvin Scott

Reginald Billington

Andrew C Coxon

Mark L Lapper

A high foaming aqueous liquid detergent composition suitable inter alia for manual dishwashing is based on a ternary active detergent system of (a) dialkyl sulphosuccinate, (b) alkylbenzene sulphonate and/or secondary alkane sulphonate and (c) alkyl ether sulphate. This combination gives both performance and formulation (viscosity, hydrotropy) benefits.

Detergent compositions

In light-duty liquid detergent compositions suitable for hand dishwashing, improved foaming performance, especially in hard water, is obtained by using combinations of particular alkylbenzene sulphonates (linear C.sub.10 -C.sub.13 alkylbenzene sulphonates substantially free of other alkyl chain lengths and containing only minor amounts of C.sub.13 material) and particular alkyl ether sulphates (those containing 20% or less of C.sub.14 and above material and having an average degree of ethoxylation of from 1 to 12).

Liquid detergent composition comprising selected alkylbenzene

The foaming performance in hard water of dishwashing detergent compositions containing dialkyl sulphosuccinates is enhanced by including in the composition a substantially water-soluble protein having a Bloom gel strength of at least 50 g, preferably from 150 to 300 g and especially from 200 to 250 g. The protein is advantageously a gelatin.

Detergent compositions containing sulphosuccinates and high bloom gel

The foaming performance in hard water of dishwashing detergent compositions containing dialkyl sulphosuccinates is enhanced by including in the composition a substantially water-soluble substantially undegraded protein, such as soluble casein, sodium caseinate, soluble gelatin or chicken egg albumen.

Detergent compositions containing sulphosuccinates and undegraded protein

The autoxidation of aqueous detergent slurries containing major quantities of nonionic surfactant during spray-drying is inhibited by the use of a charge-transfer agent. The charge-transfer agent may be a charge-transfer acceptor or a charge-transfer donor or a precursor of either of these. The agent may be present in an amount of from 0.05 to 2% by weight and the nonionic surfactant in an amount of 3% or more by weight based on the weight of the fully formulated detergent powder. The preferred charge-transfer agent is potassium iodide.

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Chester, United Kingdom

David J Edge