Disazo pigments containing naphthalene coupling components

Details Disazo pigments containing naphthalene coupling components Disazo pigments containing naphthalene coupling components

1975-08-14

1977-09-06

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260184, 260195, 260202, 260208, C09B 4312, C09B 3314

Patent

active

040467554

ABSTRACT:
Disazo pigments of the formula ##STR1## wherein R.sub.1 is 2-nitro-5-chlorophenyl or 1-nitronaphthyl-2, R.sub.2 is naphthalene in which the azo, hydroxyl and --CO--group are in the 1,2,3-position and R.sub.4 is a phenylene or naphthalene group are prepared. The disazo pigments may be used for pigmenting high molecular organic materials such as cellulose ethers, polyamides, polyurethanes and acrylic. The pigments have very good fastness to migration, heat and to light.

REFERENCES:
patent: 3262925 (1966-07-01), Mueller et al.
patent: 3658785 (1972-04-01), Ronco et al.

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