Azo pigments derived from 2-hydroxy-3-carboxynaphthalene contain

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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106 23, 106288Q, 106308M, 106308N, 260 4221, 260165, 260326A, 260326N, 260326S, 428518, C09B 2936, D06P 108, D06P 508

Patent

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039534200

ABSTRACT:
Azo pigments derived from 2-hydroxy-3-carboxy-naphthalene and containing a substituted or unsubstituted phthalimide radical. The majority give red colorations and due to their excellent fastness properties are particularly valuable for use in surface coatings and resins.

REFERENCES:
patent: 3402166 (1968-09-01), Heckl et al.
patent: 3644405 (1972-02-01), Horstmann et al.

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