US 5,854,198 A · Particulate aluminosilicate-built detergent compositions comprising cogranules of zeolite map and alkali metal silicate

Particulate aluminosilicate-built detergent compositions comprising cogranules of zeolite map and alkali metal silicate

AssigneeLever Brothers Company, Division of Conopco, Inc.

InventorsPeter Willem Appel, Theodorus Johannes Arts, Jelles Vincent Boskamp, Andrew Paul Chapple, Fredericus Cornelis Dobbe, Christophe Michel Joyeux, Carolyn Angela Lanceley, Edwin Leo Lempers, Theo Jan Osinga

Life of this patent

Estimating the term…

Abstract

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.

Claims11

Dependent claims

A particulate detergent composition having a bulk density of at least 650 g/liter, comprising

(a) a granular non-spray-dried base powder comprising one or more organic surfactants and one or more detergency builders including zeolite P having a silicon:aluminium ratio not exceeding 1.33 (zeolite MAP),
(b) optionally one or more separate particulate components,
(c) a water-soluble alkali metal silicate in an amount of from 1 to 20 wt % based on the zeolite MAP on an anhydrous basis, wherein the zeolite MAP and alkali metal silicate together form cogranules having an average particle size of from 1 to 10 .mu.m in which the alkali metal silicate is deposited on the zeolite MAP particles.

Dependencies are inferred from the claim text.