Diarylvinyl-dihydrophenanthrene compounds
US4013713A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | Sep 15, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New diarylvinyl-dihydrophenanthrene compounds of the formula ##STR1## wherein R.sub.1, R.sub.1 ', R.sub.2, R.sub.2 ', R.sub.3 and R.sub.3 ' are identical or different and represent hydrogen, alkyl with 1 to 12 carbon atoms, aralkyl with 1 to 4 carbon atoms in the alkyl part, alkoxy with 1 to 18 carbon atoms, phenyl-alkoxy with 1 to 4 carbon atoms in the alkoxy part, alkenyloxy with 3 to 4 carbon atoms, halogen, nitrile, a sulphonic acid group or its salts or functional derivatives, a carboxyalkoxy or carboxyl group or their salts or functional derivatives, or a sulphone group. These compounds are particularly useful as optical brighteners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.