Method for coloring thermoplastic resins

Details Method for coloring thermoplastic resins Method for coloring thermoplastic resins

1978-06-13

1980-06-17

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 37NP, 260 4221, C08K 304, C08K 542, C08K 556

Patent

active

042083184

ABSTRACT:
A thermoplastic resin is colored with a carbon black pigment in the presence of a sulfonamide-substituted metal phthalocyanine dyestuff of the general formula ##STR1## wherein MePc is a metal phthalocyanine residue, R.sub.1 is a hydrogen atom or an alkyl group, R.sub.2 is an alkyl group, R.sub.3 is a hydrogen atom or an alkoxyalkyl group, R.sub.4 is an alkoxyalkyl group, m is an integer of 0 to 4, n is an integer of 0 to 4, and m+n is an integer of 1 to 4. The use of the specified metal phthalocyanine dyestuff affords a completely black or bluish black thermoplastic resin free from a reddish hue which is inherent to coloration with carbon black.

REFERENCES:
patent: 2875171 (1959-02-01), Foster et al.
patent: 3532687 (1970-10-01), Pugin et al.
patent: 3558551 (1971-01-01), Gilhert et al.
patent: 3708457 (1973-01-01), Needham et al.
patent: 3909442 (1975-09-01), Tucker et al.

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