Title:
ULTRA-THIN BLACK POLYIMIDE FILM AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/093669
Kind Code:
A2
Abstract:
The present invention provides a manufacturing method for an ultra-thin black polyimide film, which is obtained by mixing and imidizing two or more different kinds of polyamic acids, the method comprising the steps of: (a) preparing a first polyamic acid with excellent hardness from the polymerization of a first dianhydride and a first diamine; (b) preparing a second polyamic acid with excellent chemical resistance from the polymerization of an end-capping agent, a second dianhydride, and a second diamine; (c) preparing carbon black with an average particle diameter of 0.1-5 μm using a milling machine and preparing a black crude liquid containing the carbon black; (d) mixing the second polyamic acid and the black crude liquid to prepare a mixture liquid; and (e) mixing the mixture liquid with the first polyamic acid to disperse the mixture liquid in the first polyamic acid, forming a film of the dispersion on a support, and then imidizing the film through heat treatment.
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Inventors:
LIM HYUN JAI (KR)
LEE KIL NAM (KR)
KIM KI HOON (KR)
LEE KIL NAM (KR)
KIM KI HOON (KR)
Application Number:
PCT/KR2018/012154
Publication Date:
May 16, 2019
Filing Date:
October 16, 2018
Export Citation:
Assignee:
SKCKOLONPI INC (KR)
International Classes:
C08J5/18; C08G73/10; C08K3/04; C08L79/08
Attorney, Agent or Firm:
LEE & KO IP (KR)
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