Fluorescent pigments
US4299959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Jan 31, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A fluorescent pigment consisting of N-substituted iminocoumarins of the general formula I, ##STR1## wherein X.sub.1 is a cyano group, a carboxamido group or an aryl or a heteroaryl radical linked directly or through a --CO or --SO.sub.2 group, PA0 X.sub.2 is an amino group, hydroxy group or an alkoxy group and when it is an amino group, may carry an optionally substituted alkylene or alkylidene group bound in ortho position to the nitrogen atom and in para position with respect to the coumarin oxygen atom, PA0 X.sub.3 is a hydrogen atom, a halogen atom or a cyano group and PA0 X.sub.4 is a functionally converted carboxyl groups. The new dyestuffs dye polyester fiber in orange or red shades with good fastness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.