Distyrylbenzene disulfone derivatives
US3956395A · kind A · utility
11Cited by
1References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jan 14, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Jan 14, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/922
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides new 1,4-distyryl-benzene derivatives corresponding to the formula ##SPC1## Wherein R represents alkyl with 1 to 8 carbon atoms which is optionally substituted by non-chromophoric radicals, phenyl which is optionally substituted by non-chromophoric radicals, alkenyl with 2 to 4 carbon atoms or cycloalkyl with 5 or 6 carbon atoms, X represents hydrogen, chlorine, or alkyl with 1 to 4 carbon atoms, Y and Y' each independently represents hydrogen, chlorine, methyl, methoxy or ethoxy, and n is 1 or 2. The new compounds are valuable optical brighteners for organic materials, especially for polyesters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.