Title:
COLORING METHOD FOR POLYCARBONATE RESIN MOLDED PRODUCT FOR OPTICAL MEMBER
Document Type and Number:
Japanese Patent JPH0362828
Kind Code:
A
Abstract:
PURPOSE:To obtain the title molded product at low cost without the need for any complicated large-scale equipment by mixing a polycarbonate resin with a liquid colorant prepared by dispersing a colorant such as dye and/or pigment in a dispersant consisting of a specific saturated fatty acid ester and by melting followed by molding. CONSTITUTION:Firstly, a liquid colorant is prepared by dispersing a colorant such as dye and/or pigment in a dispersant consisting of a saturated fatty acid ester, a full-ester of (1) a 4-35C straight chain saturated monofunctional fatty acid or 4-35C branched saturated monofunctional fatty acid and (2) a 2-35C saturated monohydric or polyhydric alcohol. Thence, 0.05-2 pts.wt. of this colorant is added from a container 1 through a pump 3 to 100 pts.wt. of a polycarbonate resin 8 for optical members put in a hopper 7 of an extruder or injection molding machine followed by heating and melting. The resulting melt is then mixed on a screw conveyor 10 and extruded or injected through a nozzle 12, thus obtaining the objective colored molded product.
Inventors:
TSUKAHARA SHUJI
UMEMURA TOSHIKAZU
ICHINOSE KAZUYOSHI
UMEMURA TOSHIKAZU
ICHINOSE KAZUYOSHI
Application Number:
JP19746489A
Publication Date:
March 18, 1991
Filing Date:
July 30, 1989
Export Citation:
Assignee:
VICTOR COMPANY OF JAPAN
MITSUBISHI GAS CHEMICAL CO
MITSUBISHI GAS CHEMICAL CO
International Classes:
C08J3/20; B29B7/94; B29C45/00; C08J3/22; C08K5/00; C08K5/101; C08L69/00; B29C45/18; (IPC1-7): C08J3/20; C08L69/00
Attorney, Agent or Firm:
Takama Imama