Aqueous alkaline, silicate-containing composition and the use thereof for bleaching cellulosic fiber materials in the presence of per compounds
US4725281A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Jul 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/03
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel aqueous composition which comprises PA0 (a) an aminopoly(alkylenephosphonic acid), an alkanepolyphosphonic acid and/or an alkali metal salt of a polyaminocarboxylic acid, PA0 (b) a polyhydroxy compound, PA0 (c) an alkali metal silicate, PA0 (d) an alkali metal hydroxide, PA0 (e) a magnesium salt, and PA0 (f) an alkali metal salt of an alkyldisulfonic acid, aryldisulfonic acid or alkaryldisulfonic acid as anionic dispersant. The composition is storage stable and is particularly suitable for use as bleaching activator and bleaching stabilizer for the pretreatment of cellulosic fibre materials with a bleaching liquor that contains a per compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.