| abstract |
A method of coloring a thermoplastic resin without substantially altering its clarity comprising the steps of first, providing a melt comprising a thermoplastic resin, second, adding one or more polymeric colorants to the melt, and third, mixing the thermoplastic resin and the polymeric colorants to form a colored thermoplastic resin having substantially the same clarity as the uncolored thermoplastic resin. Also provided are methods of imparting deep color to a thermoplastic resin without substantially altering its clarity comprising the steps of first, providing a melt comprising a thermoplastic resin, second, adding one or more polymeric colorants to the melt, wherein the amount of colorant is sufficient to impart a deep color, and third, mixing the thermoplastic resin and the polymeric colorants to form a deeply colored thermoplastic resin. Also provided are colored thermoplastic resins made by the methods of the present invention. |