Title:
ULTRA-THIN BLACK POLYIMIDE FILM AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/088454
Kind Code:
A1
Abstract:
The present invention provides, as a method for manufacturing a polyimide film to be obtained by mixing two or more types of different polyamic acids and carrying out imidization thereon, a method for manufacturing an ultra-thin black polyimide film, comprising the steps of: (a) polymerizing a first dianhydride and a first diamine so as to obtain a first polyamic acid having excellent stiffness; (b) polymerizing a second dianhydride and a second diamine so as to obtain a second polyamic acid having excellent chemical resistance; (c) preparing, by means of a milling machine, carbon black having an average diameter of 0.1-5 μm, and preparing a black crude solution containing the same; (d) preparing a mixture solution by mixing the second polyamic acid and the black crude solution; and (e) mixing and dispersing the mixture solution in the first polyamic acid, and then making a film therewith on a support, and heat treating and imidizing the same.
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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/KR2018/011536
Publication Date:
May 09, 2019
Filing Date:
September 28, 2018
Export Citation:
Assignee:
SKCKOLONPI INC (KR)
International Classes:
C08J5/18; C08G73/10; C08K3/04
Domestic Patent References:
| WO2009022619A1 | 2009-02-19 |
Foreign References:
| KR101167011B1 | 2012-07-24 | |||
| KR20070059582A | 2007-06-12 | |||
| KR20130113778A | 2013-10-16 | |||
| KR20160082639A | 2016-07-08 |
Attorney, Agent or Firm:
LEE & KO IP (KR)
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