Method of coloring polycarbonate extruded or molded products for

Details Method of coloring polycarbonate extruded or molded products for Method of coloring polycarbonate extruded or molded products for

1990-07-20

1992-05-26

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

8497, 8506, 8507, 264 78, 264211, 26432818, B29C 4500, B29C 4700, B29D 1100

Patent

active

051165473

ABSTRACT:
A method of coloring a polycarbonate extruded or molded product for optical members, which is colored by a liquid coloring process for obtaining a colored polycarbonate extruded or molded product for optical members by extrusion or injection molding. The process involves mixing a polycarbonate resin for optical members and a liquid coloring agent dispersion obtained by dispersing a coloring agent in a dispersing agent. The dispersing agent includes a specific saturated fatty acid ester or silicon oil. After mixing the polycarbonate resin and liquid coloring agent dispersion, the resulting mixture is melted and thereafter extruded or molded to form a product for optical members.

REFERENCES:
patent: 4444714 (1984-04-01), Martenson

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