Lever Brothers Company, Division of Conopco, Inc.

Unilever Home and Personal Care Usa, Division of Conopco, Inc.

Unilever Patent Holdings B.v.

Lever Brothers, Division of Conopco, Inc.

Lever Brothers Company, Div. of Conopco Inc.

Edwin Leo Lempers

Jelles Vincent Boskamp

James William Gordon

Francois Delwel

Peter Willem Appel

Colin Watt Kerr

Henning Wagner

George Thomas Dawson

Albert Cornelis De Jong

Loic Marie Tardy

Andrew P Chapple

Theo J Osinga

Christophe Michel Joyeux

Cornelis B Donker

Peter William Appel

Marcel Van Der Kraan

Carolyn Angela Lanceley

Arie Krijgsman

Vera Johanna Bakker

Jasper Mol

Fredericus Cornelis Dobbe

Theodorus Johannes Arts

A particulate zeolite-built laundry detergent composition having a bulk density of at least 550 g/l comprising at least two different granular components containing both surfactant and builder, preferably one prepared by non-tower granulation and another spray-dried, also contains from 1 to 10 wt % citric acid admixed as a separate particulate component. The admixed citric acid improves dispensing and dissolution properties, whether or not separately admixed sodium carbonate is present.

Particulate laundry detergent composition containing zeolite

Detergent tablets for use in fabric washing are made by mixing: (i) particles which contain non-soap organic surfactant and other materials, especially detergency builder, with (ii) material which is other than soap or organic surfactant and which has a solubility in water of at least 10 gm/liter at 20&deg; C., followed by compacting the mixture into a tablet or a region of a tablet using an applied pressure in a range from 3.0 to 35 MPa. Such a pressure, used with the specified mixture, leads to tablets with good strength which also disintegrates with satisfactory speed.

Process for the manufacture of tablet detergent compositions

Detergent compositions in the form of tablets used in fabric washing which incorporate most of the surfactants in particles which constitute a substantial part but not all the composition of the tablet. The organic surfactant in this particles provides a substantial part but not all of the weight of the particles. The mixture of anionic and nonionic detergent surfactants is employed wherein anionic is clearly in the majority. The balance of the composition contains a substantial proportion of material other than organic surfactant which is water-soluble.

Detergent compositions in tablet form

Cleaning compositions

A tablet of compacted particulate detergent composition including surfactant and detergency builder, suitable for fabric washing, is sub-divided into a plurality of discrete regions with differing compositions. At least one region of the tablet contains a water-swellable polymer serving to promote disintegration of this region. The polymer is present in this region in a concentration greater than in at least one other region of the tablet so as to cause disintegration of the region at a greater speed than disintegration of another region of the tablet.

Detergent compositions

Process and dispensing device for washing laundry in a washing machine

In order to enhance the stability of sodium percarbonate bleach in particulate detergent compositions, crystalline aluminosilicate and a water-soluble alkali metal silicate in an amount of from 1-20% by weight based on the aluminosilicate are included in the non-spray dried base powder. In order to obtain the stabilizing effect, the crystalline aluminosilicate comprises zeolite MAP or the alkali metal silicate is homogeneously dispersed with respect to the aluminosilicate.

Particulate aluminosilicate-built detergent compositions comprising

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Vlaardingen, Netherlands

Edwin Leo Lempers