Detergent additive compositions
AssigneeThe Procter & Gamble Company
InventorsIan Gray, Richard G. Harris
Life of this patent
Estimating the term…
Abstract
A detergent additive composition in the form of an extrudate comprising about 75% to about 95% of particulate infusible solids comprising storage-sensitive detergent-additive material and about 5% to about 25% of ethoxylated nonionic surfactant. The storage-sensitive detergent additive material is preferably an organic peroxy acid bleach precursor. When added to detergent compositions, the additive compositions have excellent storage stability and water-dispersibility characteristics.
Claims17
A detergent additive composition in the form of an extrudate comprising by weight thereof:
- (a) from about 84% to about 90% of particulate, infusible solids having a particle size distribution such that at least about 50% thereof passes a 250 micrometer screen and comprising storage-sensitive detergent additive material, and
- (b) from about 10% to about 16% of ethoxylated nonionic surfactant melting in the range from about 20.degree. C. to about 60.degree. C.,
- the composition being prepared by mixing the particulate infusible solids and ethoxylated nonionic surfactant in liquid form to form a substantially homogeneous friable mass, and mechanically extruding the friable mass by means of a screw with radial discharge through an apertured screen to form extrudate in the form of elongate particles having an average lateral dimension in the range from about 0.5 millimeters to about 2 millimeters, and an average longitudinal dimension in the range from about 1 to about 6 millimeters.
A granular detergent composition comprising:
- from about 40% to about 99.9% of spray-dried base powder comprising
- (i) from about 1% to about 20% of organic surfactant selected from anionic, zwitterionic and ampholytic surfactants and mixtures thereof,
- (ii) from about 5% to about 93.9% of detergency builder, and
- (iii) from about 5% to about 18% moisture, and from about 0.1% to about 20% of a detergent additive composition in the form of an extrudate comprising by weight thereof:
- (a) from about 84% to about 90% of particulate, infusible solids having a particle size distribution such that at least about 50% thereof passes a 250 micrometer screen and comprising storage-sensitive detergent additive material, and
- (b) from about 10% to about 16% of ethoxylated nonionic surfactant melting in the range from about 20.degree. C. to about 60.degree. C.,
- the composition being prepared by mixing the particulate infusible solids and ethoxylated nonionic surfactant in liquid form to form a substantially homogeneous friable mass, and mechanically extruding the friable mass by means of a screw with radial discharge through an apertured screen to form extrudate in the form of elongate particles having an average lateral dimension in the range from about 0.5 millimeters to about 2 millimeters, and an average longitudinal dimension in the range from about 1 to about 6 millimeters.
Dependencies are inferred from the claim text.