Back to results
US 5,407,594 AGranted
Detergent tablets having specific particle size distribution
AssigneeLever Brothers Company, Division of Conopco, Inc.
InventorsAlan J. Fry, Michael J. Garvey, William J. Iley, Geoffrey Newbold, Douglas Wraige
Life of this patent
Estimating the term…
Abstract
A tablet of compacted particulate detergent composition in which the tablet, or a discrete region thereof, consists essentially of a matrix of particles substantially free of particles <200 .mu.m. Particles of detergent-active compound and detergent builder and optionally particles of detergent base powder are individually coated with binder/disintegrant capable, when the tablet is immersed in water, of disrupting the structure of the tablet.
Claims13
A tablet of compacted particulate detergent composition comprising:
- 2 to 50% by weight of a detergent active compound selected from the group consisting of anionic, nonionic, zwitterionic and amphoteric detergents and mixtures thereof;
- and
- 20 to 80% by weight of a detergent builder characterized in that the tablet consists essentially of a matrix of particles at least 90% of which lie within a size range of 200 to 2000 .mu.m with not more than 5 wt. % of the particles larger than 2000 .mu.m and not more than 5 wt. % smaller than 200 .mu.m, the particles of detergent active compound and detergent builder being individually coated with a polymeric material serving as a binder in the tablet and serving as a disintegrant which, when the tablet is immersed in water, is capable of disrupting the structure of the tablet.
Dependencies are inferred from the claim text.