Pyridone-based yellow monoazo dye for use in thermal transfer and ink compositions comprising same
US5929218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1996 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | May 8, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/363
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to pyridone-based yellow monoazo dyes used in thermal transfer having following formula(I) which have good stability and hue. ##STR1## wherein, R.sub.1 is hydrogen atom; unsubstituted or substituted alkyl group of from 1 to 8 carbon atoms with alkoxy or aryl; or unsubstituted or sustituted aryl group with alkoxy or halogen. And, PA1 X is hydrogen atom; alkyl group of from 1 to 4 carbon atoms; alkoxy group; or halogen; PA1 R.sub.2 is selected from the following groups; ##STR2## wherein, R.sub.3 and R.sub.4 are independently selected from groups consisting hydrogen, substituted or unsubstituted alkyl group of from 1 to 4 carbon atoms, halogen, alkyl carboxylate, and carbonyl group; PA1 R.sub.3 -R.sub.4 is noncyclization with R.sub.3 and R.sub.4 and selected respectively from the above substituents(R.sub.3 and R.sub.4); or saturated or unsaturated cycloalkyl of from 3 to 6 carbon atoms, PA1 Z is nitro, halogen, alkyl group of from 1 to 4 carbon atoms, alkoxy, sulfonyl, carbonyl, carboxyamide, sulfonamino, cyano, hydroxy or hydrogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.