Diaryl pigments with improved heat stability and transparency co

Details Diaryl pigments with improved heat stability and transparency co Diaryl pigments with improved heat stability and transparency co

1988-04-28

1990-11-06

Higel, Floyd D.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106 22, 106 23, 106496, 534573, 534747, 534740, 534887, 534760, C09B 6706, C09B 6720, C09B 6722

Patent

active

049683527

ABSTRACT:
Diaryl pigments having excellent dried ink transparency and improved process heat stability are prepared by carrying out the coupling of a bisdiazotized substituted 4,4' diaminobiphenyl with acetoacetanilides and/or pyrazolinones in the presence of an added quantity of one or more substituted aromatic amines containing at least one sulfonic or carboxylic acid substituent, or their salts. The pigments exhibit improved tolerance to variations in drying temperatures and to high drying temperatures, and have improved transparency when present in dried ink formulations.

REFERENCES:
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patent: 3617171 (1971-11-01), Ribka
patent: 3759731 (1973-09-01), Kuhne et al.
patent: 3775148 (1973-11-01), Bradley
patent: 3776749 (1973-12-01), McKay et al.
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patent: 3978038 (1976-08-01), Cseh et al.
patent: 4055559 (1977-10-01), Cseh et al.
patent: 4081439 (1978-03-01), Hari et al.
patent: 4206114 (1980-06-01), Roueche
patent: 4399068 (1983-08-01), Kramer
patent: 4665163 (1987-05-01), Hunger et al.

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