Liquid colorant/additive concentrate for thermoplastics...

Details Liquid colorant/additive concentrate for thermoplastics... Liquid colorant/additive concentrate for thermoplastics...

C - Chemistry, Metallurgy

08

J

C08J 3/20 (2006.01) C08J 3/205 (2006.01) C08L 101/00 (2006.01)

Patent

CA 2111449

Abstract The invention provides a method for coloring a thermoplastic material by forming a dispersion of a pigment or dye, volatile solvent and optional surfactant, all of which are compatible with a thermoplastic material to be colored. A substantially uniform physical mixture of the dispersion and a thermoplastic material is formed and the mixture is heated at such a temperature to form a melt. The mixture is maintained at a temperature sufficiently high for a time sufficiently long to cause the substantial evaporation of the solvent composition. The invention also provides a colored thermoplastic material formed by this process.

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