Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1995-02-28
1996-12-03
Harriman, Erin M.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510433, 510434, C11D 112, C11D 304, C11D 332
Patent
active
055808492
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to liquid or gel detergent compositions containing anionic sulfate or sulfonate surfactant, divalent ions selected from calcium ions and strontium ions, and a stabilizing agent thereof.
BACKGROUND OF THE INVENTION
Detergent compositions containing polyhydroxy fatty acid amide and anionic sulfate surfactant are known from International Application WO 92-06162.
Copending U.S. patent application Ser. No. 07/755900, it has been disclosed that the addition of calcium to detergent compositions containing polyhydroxy fatty acid amide and anionic sulfate surfactant can improve the removal of greasy soils while delivering good hand mildness in particular when calcium ions are added to light duty liquid dishwashing compositions containing polyhydroxy fatty acid amide and anionic sulfate surfactant, surprisingly improved greasy soil removal from dishes was found.
It is known however that calcium is difficult to formulate into a stable liquid composition; copending U.S. patent application Ser. No. 07/755900 proposes to use lime soap dispersing agents for this purpose; in published Canadian Patent Application No. 20550481 it has been proposed to use certain calcium chelating agents in order to stabilize calcium, in liquid detergent compositions containing an alkyl ethoxy carboxylate surfactant.
It has now been found that calcium or strontium ion containing liquid or gel detergent compositions, containing nonionic surfactant and anionic sulfate or sulfonate surfactant, can be remarkably stabilized by the use of a carboxylate which forms a water soluble calcium or strontium salt, most especially by the use of malic, maleic or acetic acid.
Said compositions may be formulated and sold as liquids or gels. Alternatively the compositions may be made up by dissolving a concentrated composition (sold as a concentrate for dilution), which may be solid or liquid, into water containing divalent ions to form a composition in accord with the invention.
The present invention therefore provides remarkably stable liquid or gel detergent compositions which exhibit superior greasy oil removal properties.
DESCRIPTION OF THE INVENTION
The liquid detergent compositions of the present invention comprise, by weight of the composition: (a) from about 3% to about 95% of anionic surfactant selected from anionic sulfate surfactant, anionic sulfonate surfactant, and any mixtures thereof; (b) from about 3% to about 40% of nonionic surfactant, most preferably polyhydroxy fatty acid amide having the formula: ##STR1## wherein R.sup.1 is hydrogen, C.sub.1 -C.sub.4 hydrocarbyl, 2-hydroxyethyl, 2-hydroxypropyl, or mixtures thereof; R.sup.2 is C.sub.5 -C.sub.31 hydrocarbyl; and Z is a polyhydroxy-hydrocarbyl having a linear hydrocarbyl chain with at least three hydroxyl groups directly connected to the chain, or an alkoxylated derivative thereof; (c) from about 0.1% to about 3% of divalent ions selected from calcium ions, strontium ions, and any mixtures thereof; (d) from 0.05 to 10% of stabilizing agent selected from malic acid, maleic acid, acetic acid, and any mixtures thereof, at a molar ratio with said divalent ion of from 0.01:1 to 10:1.
The detergent compositions of the present invention comprise from about 3% to about 95%, more preferably from about 5% to about 60%, most preferably from about 10% to about 40%, by weight of anionic surfactant selected from anionic sulfate or sulfonate surfactants, and any mixtures thereof.
The anionic sulfate surfactant may be any organic sulfate surfactant. It is preferably selected from the group consisting of C.sub.10 -C.sub.16 alkyl sulfate which has been ethoxylated with from about 0.5 to about 20 moles of ethylene oxide per molecule, C.sub.9 -C.sub.17 acyl-N-(C.sub.1 -C.sub.4 alkyl) glucamine sulfated, --N--(C.sub.2 -C.sub.4 hydroxyalkyl) glucamine sulfate, and mixtures thereof. More preferably, the anionic sulfate surfactant is a C.sub.10 -C.sub.16 alkyl sulfate which has been ethoxylated with from about 0.5 to about 20, preferably from about 0.5 to about
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Clarke Joanna M.
Dyet Julie A.
Foley Peter R.
Fraser Fiona A.
Murch Bruce P.
Harriman Erin M.
Reed T. David
The Procter & Gamble & Company
Yetter Jerry J.
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