Laked pyrazolone azo pigment, process for its preparation and it

Details Laked pyrazolone azo pigment, process for its preparation and it Laked pyrazolone azo pigment, process for its preparation and it

1989-09-28

1991-09-10

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534573, 534581, 534582, 534588, 534602, 534793, C09B 6300, D06P 144, D06P 379

Patent

active

050475177

ABSTRACT:
The invention relates to a yellow monoazo pigment which is obtained by diazotization of 2-amino-4-chloro-5-methylbenzene-1-sulfonic acid, coupling of the diazonium compound with 1-(3'-sulfophenyl)-3-methyl-5-pyrazolone and subsequent laking of the coupling product to the calcium salt.
The new pigment has excellent heat stability and bleeding fastness and good light stability. It is particularly suitable for the pigmenting of polymeric plastics in the mass.

REFERENCES:
patent: 2948715 (1960-08-01), Siebert et al.
patent: 3545992 (1970-12-01), Christmann et al.
patent: 4594411 (1986-06-01), Henning
patent: 4767844 (1988-08-01), Ando et al.
Dobrovolny et al., Chemical Abstracts, vol. 76, No. 114834z (1972).
Georg Henning, Chem. Abs., 88:38948v, (1978).
Georg Henning, Chem. Abs., 102:63586r, (1985).

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