4-Heterocyclylvinyl-4-'styryl-biphenyls
US4666627A · kind A · utility
6Cited by
16References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1984 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Jul 27, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/65
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel 4-heterocyclylvinyl-4'-styryl-biphenyls of the formula ##STR1## are described, i which A is an isoxazolyl, oxadiazolyl, pyrimidinyl or triazinyl radical which is unsubstituted or substituted by a non-chromophoric substituent, R.sub.1 is hydrogen or a non-chromophoric substituent and R.sub.2 is hydrogen, halogen, or alkyl; processes for the preparation of these compounds are also described. The novel 4-heterocyclylvinyl-4'-styryl-biphenyls can be used as fluorescent brighteners for high-molecular organic materials, in particular materials of polyamide and polyester, especially for polyester textiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.