Process for the production of colored resin composition and...

C - Chemistry – Metallurgy – 08 – J

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C08J 3/22 (2006.01) C08J 3/205 (2006.01) C08J 3/215 (2006.01) C08K 9/04 (2006.01) C08L 23/00 (2006.01) C09D 17/00 (2006.01) C09D 123/02 (2006.01)

Patent

CA 2405916

A process for producing a colored resin composition, characterized by comprising (A) the step of producing an aqueous pigment slurry, (B) the step of producing a melt of a metallocene polyolefin containing a dispersant and a solvent, (C) the step of kneading the aqueous slurry obtained in the step (A) together with the melt obtained in the step (B), and (D) the step of removing the solvent and water from the mixture obtained by kneading in the step (C). According to the process, a colored resin composition is provided in which the pigment has been highly dispersed and has the high ability to develop a color. Also provided is a colored resin molding which is less apt to have defects generated during molding, such as color unevenness and flow marks, and which has not undergone a decrease in mechanical property of 5% or more.

L'invention concerne un procédé de production d'une composition de résine colorée, ce procédé consistant à : (A) produire une suspension aqueuse de pigment, (B) produire un bain de polyoléfine métallocène contenant un dispersant et un solvant, (C) malaxer la suspension aqueuse obtenue à l'étape (A) avec le bain obtenu à l'étape (B) et (D) éliminer le solvant et l'eau du mélange obtenu par malaxage à l'étape (C). Ce procédé permet d'obtenir une composition de résine colorée dans laquelle le pigment a été hautement dispersé et présente une haute capacité de coloration. L'invention concerne également un moulage de résine colorée présentant un risque réduit de formation de défauts lors du moulage, tels qu'une irrégularité de couleur ou des marques de coulée, et n'ayant pas subi de perte de propriétés mécaniques supérieure à 5 %.

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