Liquid detergents containing specifically disulfonated dibenzofuranyl-biphenyls as flourescent whitening agents
US5279772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1993 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Feb 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/42
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present patent application describes novel liquid detergent compositions containing specifically disulfonated dibenzofuranylbiphenyls of the formula ##STR1## in which X is a sulfonic acid radical, hydrogen or C.sub.1 -C.sub.4 alkyl and Y and Z independently of the other are a sulfonic acid radical, hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogeno, CN, phenoxy or benzyloxy, with the proviso that either X or Y or Z is a sulfonic acid radical and the remaining substituents are not a sulfonic acid radical, and the preparation and use thereof; these detergent compositions prevent spotting on textile fabric when it comes into direct contact with the liquid detergent composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.