Distyrylbiphenyl compounds
US5145991A · kind A · utility
6Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | May 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C309/59
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Distyrylbiphenyl compounds of formula ##STR1## wherein R.sub.1, R.sub.3, R.sub.6 and R.sub.7 are halogen, hydrogen, C.sub.1 -C.sub.4 alkyl or cyano, and M.sup..sym. is a salt-forming cation, are used as fluorescent whitening agents in solid and, preferably, liquid, detergent compositions. They are distinguished by good white effects and insignificant spotting behavior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.