Anthraquinone azopyrazalone colorants

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

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Details

106 23, 106288Q, 106300, 106308Q, 5262181, 526219, C09B 5612, D06P 104, D06P 144

Patent

active

045635196

ABSTRACT:
Compounds which, in one of the possible tautomeric forms, correspond to the general formula I ##STR1## where n is 1 or 2 and, if n is 1, R is unsubstituted or substituted aryl or heteroaryl or, if n is 2, R is a bridge member, and the rings A and B can be further substituted, are outstanding colorants for surface coatings, printing inks or plastics.

REFERENCES:
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patent: 2040927 (1936-05-01), Ellis et al.
patent: 2112276 (1938-03-01), Ellis et al.
patent: 2346922 (1944-04-01), Johnson
patent: 2871234 (1959-01-01), Bergstrom
patent: 3212841 (1965-10-01), Stanley
patent: 3320233 (1967-05-01), Braun et al.
patent: 3954398 (1976-05-01), Ramanathan

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