Patent ID: 6602846
Filing Date: 2003-08-05
Classification: C11D

Abstract:
A process for preparing uni-core detergent particles having a degree of particle growth of 1.5 or less and a bulk density of 500 g/L or more, comprising the steps of:(C-I): mixing base particles for supporting a surfactant which have an average particle size of from 150 to 500 &mgr;m and a bulk density of 400 g/L or more (Component (a)), a powdery builder (Component (bâ€²)) of which primary average particle size is from 5 to 50 &mgr;m in an amount of from 5 to 50 parts by weight, based on 100 parts by weight of Component (a), and a surfactant composition (Component (c)); (C-II): mixing a mixture obtained in Step (C-I) with a powdery builder (Component (b)) of which primary average particle size is from 3 to 30 &mgr;m in an amount of from 5 to 50 parts by weight, based on 100 parts by weight of Component (a); and (C-III): mixing a mixture obtained in Step (C-II) with a fine powder (Component (d)) of which primary average particle size is smaller than that of Component (b) in an amount of from 5 to 100 parts by weight, based on 100 parts by weight of said mixture, wherein a formulation ratio of Component (a) and Component (c) in Step (C-I) is such that an amount of Component (c) is from 20 to 100 parts by weight, based on 100 parts by weight of Component (a).