Preparation of yellow pigment

Details Preparation of yellow pigment Preparation of yellow pigment

C - Chemistry, Metallurgy

09

B

C09B 67/04 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2552487

A process for preparing transparent Pigment Yellow 138 by grinding Pigment Yellow 138 in the presence of a grinding agent, preparing an aqueous slurry of the ground particles, and filtering the slurry resulting in a filter cake containing particles of transparent Pigment Yellow 138. In addition, a process for improving color strength of an ink and/or plastic composition is also disclosed by adding transparent Pigment Yellow 138 to the composition.

L'invention concerne un procédé de préparation du pigment jaune 138, consistant à broyer le pigment jaune 138 en présence d'un agent de broyage, à préparer une pâte aqueuse formée de particules broyées, et à filtrer la pâte afin d'obtenir un cube filtré contenant des particules du pigment jaune 138. L'invention concerne, de plus, un procédé destiné à améliorer l'intensité de la couleur d'une composition d'encre et/ou de plastique, grâce à l'ajout du pigment jaune 138 transparent dans la composition.

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