Title:
SOLUTION FOR COATING
Document Type and Number:
Japanese Patent JP2019196500
Kind Code:
A
Abstract:
To provide a solution for coating, capable of obtaining a PI film having an even thickness without generating orange peel even when shortening the time in drying and heat-curing a PAA (polyamic acid) coated film.SOLUTION: The solution for coating is used for a flexible polyimide substrate for forming an electronic device selected from a liquid crystal display, a plasma display panel, an organic EL display, and electronic paper, having following characters: 1) it comprises a PAA (polyamic acid) and an amide solvent, and as the constituents of the PAA, used are 3,3',4,4'-biphenyltetracarboxylic acid anhydride (BPDA), and p-phenylenediamine; 2) the solid content concentration of PAA is 16 mass% or more and 25 mass% or less relative to a solution mass; and 3) the solution viscosity at 25°C is 2 Pa s or higher and 200 Pa s or lower.SELECTED DRAWING: None
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Inventors:
SUGIMOTO YOSUKE
YAMADA HIROKI
YOSHIDA TAKESHI
SHIGETA AKIRA
ECHIGO YOSHIAKI
YAMADA HIROKI
YOSHIDA TAKESHI
SHIGETA AKIRA
ECHIGO YOSHIAKI
Application Number:
JP2019147652A
Publication Date:
November 14, 2019
Filing Date:
August 09, 2019
Export Citation:
Assignee:
UNITIKA LTD
International Classes:
C08G73/10; G02F1/1333
Domestic Patent References:
| JPS6063226A | 1985-04-11 | |||
| JP2010202729A | 2010-09-16 | |||
| JPH111614A | 1999-01-06 | |||
| JP2016062965A | 2016-04-25 | |||
| JP2012035583A | 2012-02-23 | |||
| JP2009091573A | 2009-04-30 | |||
| JP2010168517A | 2010-08-05 |
Foreign References:
| WO2012173204A1 | 2012-12-20 | |||
| WO2011145696A1 | 2011-11-24 |