Granular bleach activator compositions and detergent compositions containing them
AssigneeThe Procter & Gamble Company
InventorIan Gray
Life of this patent
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Abstract
Granular detergent compositions comprising an agglomerate of finely-divided organic peroxy acid bleach precursor, and water-soluble or water-dispersible organic binding agent having a melting point of no more than 40.degree. C., and having a surface coating of water-insoluble natural or synthetic silica or silicate. The compositions have improved granular physical characteristics, chemical stability and rate of solution/dispersion characteristics.
Claims20
A granular bleach activator composition in the form of an agglomerate comprising by weight thereof:
- (a) at least 75% of finely-divided organic peroxy acid bleach precursor,
- (b) from 8% to 15% of water-soluble or water-dispersible organic binding agent for the bleach precursor, the binding agent having a melting point of no more than 40.degree. C. and being selected from the group consisting of ethoxylated primary or secondary alcohols having an average degree of ethoxylation from 3-12 inclusive and an average HLB in the range from 9.5 to 13.5,
- (c) from 1.2% to 2.1% of finely-divided water-insoluble natural or synthetic silica or silicate as a surface-coating agent for the agglomerate, the weight ratio of the bleach precursor binding agent to surface-coating agent being 10:1 or less.
A granular detergent composition comprising from 0.5% to 100% thereof of a granular bleach activator composition in the form of an agglomerate comprising by weight thereof:
- (a) at least 75% of finely-divided organic peroxy acid bleach precursor,
- (b) from 8% to 15% of water-soluble or water-dispersible organic binding agent for the bleach precursor, the binding agent having a melting point of no more than 40.degree. C. and being selected from the group consisting of ethoxylated primary or secondary alcohols having an average degree of ethoxylation from 3-12 inclusive and an average HLB in the range from 9.5 to 13.5,
- (c) from 1.2% to 2.1% of finely-divided water-insoluble natural or synthetic silica or silicate as a surface-coating agent for the agglomerate, the weight ratio of the bleach precursor binding agent to surface-coating agent being 10:1 or less.
Dependencies are inferred from the claim text.