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1. (WO2001036541) HIGH STRENGTH MONOAZO YELLOW PIGMENT

Pub. No.:    WO/2001/036541    International Application No.:    PCT/US2000/031259
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Tue Nov 14 00:59:59 CET 2000
IPC: C09B 63/00
C09B 67/22
Applicants: ENGELHARD CORPORATION
Inventors: BINDRA, Amrit, P.
Title: HIGH STRENGTH MONOAZO YELLOW PIGMENT
Abstract:
Disclosed is a yellow monoazo pigment which is obtained by diazotization of anthranilic acid, coupling of the diazonium compound with 1-(3'-sulphophenyl)-3-methyl-5-pyrazolone and subsequent laking of the coupling product to a strontium salt. The pigment is characterized by formula (I). The new pigment has excellent heat stability and bleed fastness and very high color strength. It is suitable for pigmenting of plastics, inks and coatings, and particularly suitable for pigmenting of plastics.