New bis-oxadiazole compounds
US3947410A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1973 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Oct 17, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/35
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides new bis-oxadiazole compounds of the formula ##EQU1## wherein R.sub.1 and R.sub.1 ' independently of one another represent hydrogen, an optionally non-chromophorically substituted aliphatic, cycloaliphatic or araliphatic radical with up to 18 carbon atoms or an optionally non-chromophorically substituted, at most binuclear, carbocyclic or heterocyclic aromatic radical and Q represents a radical ##SPC1## Wherein a represents hydrogen, halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, sulpho groups or their salts or an optionally substituted sulphamoyl group or both radicals a together with the diphenylene radical represent a 9,10-dihydrophenanthrene ring and the benzene ring A can optionally be substituted by halogen, alkyl with 1 to 4 carbon atoms, sulpho groups or their salts or an optionally substituted sulphamoyl group or can possess a fused-on six-membered ring. The new compounds are useful optical brighteners for high-molecular organic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.