Polymeric color concentrates for thermoplastic polymeric materials

Claim 1

A color concentrate for coloring thermoplastic polymeric materials, the concentrate comprising a blend of the following two essential components, from which blend any solvent present during processing is subsequently removed: (A) A water- or polar organic solvent-dispersible polycondensation or addition polymer polymerized from condensable or unsaturated monomers containing functional groups capable of solubilizing or dispersing the polymer in water or in polar organic solvents, and which is capable of being: (1) utilized in the preparation of 1-95% solution or dispersion; (2) recovered from a 1-95% solution or dispersion thereof at a temperature which will not cause substantial volatilization or degradation thereof; (3) fused at a temperature between about 130° and 350° C.; (4) melted with the thermoplastic polymeric material to be colored without substantial degradation or reaction and without any visible separation therefrom on a microscopic scale; and (5) utilized to wet the surface of pigments by adhesion thereto; and (B) A heat-stable, chemically-inert coloring agent selected from the group consisting of: water-soluble dyes; polar organic solvent-soluble dyes; polymer-soluble dyes; and pigments, the coloring agent causing no visible chemical reaction with the thermoplastic polymeric material to be colored or the water- or polar organic solvent-dispersible polycondensation or addition polymer.