Process for preparing a solid detergent block
US5719111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Feb 15, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A detergent block of compressed granular material is provided, said block having a weight of 0.2-10 kg, being substantially free of phoshate builder material, and comprising a granulated builder material, an alkaline agent and a compressing aid. A process is also provided for preparing a block of compressed granular material being substantially free of a phosphate builder and having a weight of 0.2 to 10 kg, said process involving the steps of PA1 (i) granulating a non-phosphate builder material, with 0.1-10% by weight based on the weight of the builder of a co-ingredient selected from polycarboxylic polymer solutions, alkali metal silicate solutions, and mixtures thereof;and PA1 (ii) compressing a particulate mixture of said granulated builder material and other components of the block, including a compressing aid, in a mould under a pressure of 3-30 kN/cm.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.