Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Patent
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).
Hoechst Aktiengesellschaft
Lee Mary C.
Powers Fiona T.
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