Process for preparing metalized azo pigments

Details Process for preparing metalized azo pigments Process for preparing metalized azo pigments

1977-01-31

1979-03-06

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260208, C09B 2910, C09B 6300

Patent

active

041430360

ABSTRACT:
Preparation of Aqueous-Stable Metalized Azo Pigment from 5-amino or 4-amino-2-chloro-toluene-5-sulfonic Acid and 3-hydroxy-2-naphthoic Acid with Calcium and Strontium Salts by diazotizing one of 2-chloro-5-amino-toluene-4-sulfonic acid and 2-chloro-4-amino-toluene-5-sulfonic acid, contacting the diazo with an inorganic salt of calcium, coupling the diazo with 3-hydroxy-2-naphthoic acid, and contacting the coupled diazo with an inorganic salt of strontium. The resulting metalized azo pigment exhibits high stability in aqueous coating compositions.

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patent: 918244 (1909-04-01), Wurthner
patent: 983486 (1911-02-01), Ernst et al.
patent: 1951298 (1934-03-01), Wagner
patent: 2117860 (1938-05-01), Siegel
patent: 2694055 (1954-11-01), Ludwig et al.
patent: 2727888 (1955-12-01), Hannum
patent: 2744027 (1956-05-01), Struve et al.
patent: 2821525 (1958-01-01), Waitkins et al.
patent: 3520870 (1970-07-01), Dombroski

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