Water-soluble, water-softening builder
US6334904B1 · kind B1 · utility
3Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0073
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a water-soluble, water-softening builder in the form of a tablet comprising 40-98% by weight of a combination ofa) one or more organic, multifunctional polycarboxylic acid(s) or alkali metal salts thereof, andb) a polymer with water-softening propertiesin an a:b weight ratio of from 80:20 to 50:50, where the polymer with water-softening properties is a partially neutralized polyacrylic acid having a molecular weight of 1500-8000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.