Near-infrared ray absorbing polyazo compound

Details Near-infrared ray absorbing polyazo compound Near-infrared ray absorbing polyazo compound

1999-03-23

2000-10-31

Powers, Fiona T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534658, 534689, 534754, 534796, 534797, 534763, 534806, 534809, 534810, 534811, 534815, 534829, 534834, C09B 31068, C09B 31072, C09B 3156

Patent

active

061404772

ABSTRACT:
A polyazo compound capable of effectively absorbing near-infrared rays, which can be produced from readily available raw materials is provided, which comprises at least one --OH group or at least one group derived from --OH group at p-position of the azo group in the molecule of the polyazo compound. This compound can be produced by diazotizing a substituted or nonsubstituted aromatic monocyclic or polycyclic compound or heterocyclic compound, each having a diazotizable primary amino group, and successively coupling the resulting diazo component with an azo component having a diazotizable primary amino group, the last azo component being such that --OH group or a group derived from --OH group be present at p-position to the azo group resulting from the azo component.

REFERENCES:
patent: 4977249 (1990-12-01), Matsumoto et al.
Przybyliski et al., Chemical Abstracts, 102:26364, 1985.
Chemical Abstracts, 64:2199f, 1966.

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