POLYIMIDE PRECURSOR SOLUTION

• Main Authors: ECHIGO YOSHIAKI, SUGIMOTO YOSUKE, YOSHIDA TAKESHI, SHIGETA AKIRA, YAMADA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a high-concentration polyimide precursor solution comprising a salt of 3,3',4,4'-biphenyltetracarboxylic acid diester (s-BPAE) and 4,4'-oxydianiline (ODA), from which a crystalline polyimide film having excellent dimensional stability and solvent resistance can be obtained.SOLUTION: A polyimide precursor solution characterized by the following. 1) The solute comprises a salt of s-BPAE and ODA, and contains substantially no a-BPAE. 2) The solvent is an alcohol having a boiling point of 100°C or higher.SELECTED DRAWING: None 【課題】寸法安定性、耐溶剤性に優れた結晶性ポリイミドフィルムを得ることができる、３，３′，４，４′−ビフェニルテトラカルボン酸ジエステル（ｓ−ＢＰＡＥ）と、４，４′−オキシジアニリン（ＯＤＡ）との塩からなる高濃度ポリイミド前駆体溶液の提供。【解決手段】以下を特徴とするポリイミド前駆体溶液。１）溶質が、ｓ−ＢＰＡＥと、ＯＤＡとの塩からなり、ａ−ＢＰＡＥを、実質的に含有しない。２）溶媒が、沸点が１００℃以上のアルコールである。【選択図】なし