Bis-benzoxazolyl-naphthalenes as optical brighteners
US3993659A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Feb 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D263/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1,4-Bis-benzoxazolyl-(2)'-naphthalenes of the formula ##SPC1## Wherein R denotes optionally non-chromophorically substituted alkyl with 1 to 18 carbon atoms, alkenyl with 2 to 4 carbon atoms, cycloalkyl, aryl or aralkyl, Y denotes hydrogen, alkyl with 1 to 4 carbon atoms, halogen, carboxyl, carbalkoxy with 2 to 5 carbon atoms or the radical --SO.sub.2 R', wherein R' represents optionally non-chromophorically substituted alkyl with 1 to 18 carbon atoms, cycloalkyl, alkenyl with 2 to 4 carbon atoms, aryl or aralkyl, and X and X' independently of one another denote hydrogen, chlorine or alkyl with 1 to 4 carbon atoms. These new compounds are useful as optical brighteners for organic materials, especially for polyesters, polyvinyl chloride, polystyrene, polyacrylonitrile and cellulose acetates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.