Preparation of non-aqueous, particulate-containing liquid detergent compositions with surfactant-structured liquid phase
AssigneeThe Procter & Gamble Company
InventorsJay I. Kahn, Mark A. Smerznak, Walter A. M. Broeckx, Iwein J. M. J. Goderis
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Abstract
Disclosed is a process for preparing non-aqueous, particulate-containing liquid laundry detergent compositions which are in the form of a suspension of particulate material, preferably including peroxygen bleaching agent and an organic detergent builder, dispersed in a liquid phase structured alkylbenzene sulfonate anionic surfactant-containing powder. The compositions so prepared provide especially desirable cleaning and bleaching of fabrics laundered therewith and also exhibit especially desirable pourability and chemical and phase stability.
Claims17
A process for preparing a non-aqueous liquid detergent composition in the form of a suspension of solid, substantially-insoluble particulate material dispersed throughout a structured, surfactant-containing liquid phase, which process comprises steps of:
- A) forming an aqueous slurry containing from about 45% to 94% by weight of one or more alkali metal salts of linear C10-16 alkyl benzene sulfonic acids and from about 2% to 50% by weight of one or more dissolved non-surfactant salts;
- B) drying the slurry formed in Step A to a solid material containing from about 0.5% to 4% by weight of water;
- C) adding, in particulate form, the dried solid material of Step B to an agitated liquid medium comprising one or more non-aqueous organic diluents, to thereby form a structured, surfactant-containing liquid phase;
- and thereafter
- D) subjecting the structured, surfactant-containing liquid phase formed in Step C to milling or high shear agitation at a temperature from about 20° C. to 60° C., said milling or high shear agitation being sufficient to increase the yield value of said structured, surfactant-containing liquid phase to a level within the range from 1 Pa to 8 Pa, to thereby form said non-aqueous liquid detergent composition.
A process for preparing a non-aqueous liquid detergent composition in the form of a suspension of solid, substantially-insoluble particulate material dispersed throughout a structured, surfactant-containing liquid phase, which process comprises the steps of:
- A) forming an aqueous slurry containing from 45% to 85% by weight of sodium linear C10-14 alkyl benzene sulfonate and from about 10% to 50% by weight of one or more dissolved salts selected from sodium citrate and sodium sulfate;
- B) drying the slurry formed in Step A to a solid material containing from about 0.5% to 4% by weight of water;
- C) adding, in particulate form, the dried solid material of Step B to an agitated liquid medium comprising a combination of non-aqueous liquid nonionic surfactant and a non-aqueous, low polarity, non-surfactant solvent, to thereby form a structured, surfactant-containing liquid phase which comprises
- i) from about 50% to 99% by weight of the admixture of said nonionic surfactant/solvent combination;
- and
- ii) from about 0.5% to 40% by weight of the admixture of the dried solid Step B material;
- D) adding soluble detergent composition adjuvants selected from ancillary surfactants, dispersants, clay soil removal/antiredeposition agents and combinations thereof to the extent of from about 0.1% to 5% by weight of the admixture;
- E) adding insoluble detergent composition adjuvants selected from builders, alkalinity sources, chelants, thickening agents, whitening agents and combinations thereof to the extent of from about 0.1% to 50% by weight of the admixture;
- F) subjecting the admixture formed in Step E to milling or high shear agitation at a temperature from about 20° C. to 60° C., said milling or high shear agitation being sufficient to increase the yield value of said admixture to a level within the range from 1 Pa to 8 Pa;
- and thereafter
- G) adding to the admixture formed in Step F additional particulate material selected from peroxygen bleaching agents, peroxygen bleach activators, enzyme prills and combinations thereof;
- to thereby form said non-aqueous liquid detergent composition.
Dependencies are inferred from the claim text.