Particulate detergent composition and method for cleaning fabrics
US4460373A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1982 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Jul 29, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of bleaching fabrics comprises contacting the fabrics with a liquor containing a surfactant and a chlorite such as sodium chlorite and irradiating the fabric and/or the liquor with ultra-violet light derived from an artificial source or from daylight. The liquor has a pH ideally above 8.5. A UV-light exposure equivalent to 2 hours daylight gives good results. The liquor may contain a number of other components common in bleaching products. The composition is a particulate detergent composition comprising at least 1% by weight of surfactant, 0.1-40% by weight of chlorite and less than 20% by weight of water, yielding a pH of about 8.5-11 when dispersed in water at a concentration of 0.5-10 g/l. The compositions are stable on storage and the time and degree of bleaching can be controlled by control of the exposure to UV-light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.