Diaryl pigments, a process for their preparation and their use

Details Diaryl pigments, a process for their preparation and their use Diaryl pigments, a process for their preparation and their use

C - Chemistry, Metallurgy

09

B

260/162, 6/217,

C09B 35/021 (2006.01) C09B 35/10 (2006.01) D06P 1/04 (2006.01)

Patent

CA 1198730

Abstract of the disclosure: Diaryl pigments having an excellent stability to heat are obtained by carrying out the coupling of bis- diazotized 3,3'-dichloro-4,4'-diaminobiphenyl with aceto- acetanilides in the presence of an added quantity of acetoacetanilides which are monosubstituted or disubsti- tuted in the 3-position or 4-position of the nucleus. As a result of their good heat stability, these pigments are particularly suitable for pigmenting plastics having processing temperatures above 200°C.

431174

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