PROCESS FOR PRODUCTION OF COLORED RESIN POWDER

摘要

A process for the production of colored resin powder which comprises the coloring step of preparing a color paste (B) by mixing 0.5 to 40% by mass of a colorant (b1) with 99.5 to 60% by mass of a non-phthalate plasticizer (b2), adding the paste (B) to a powdered thermoplastic polyurethane-urea resin (A), and subjecting the mixture to blending, wherein the amounts of the colorant (b1) and plasticizer (b2) resulting from the paste (B) added are 0.1 to 5 parts by mass and 1 to 20 parts by mass respectively per 100 parts by mass of the resin (A). This process can give colored resin powder which is free from surface color mottles (segregations) and from the problematic staining of a molded article with a colorant falling off in the molding step. ® KIPO & WIPO 2008