POLYAMIDE IMIDE SOLUTION

• Main Authors: SHIBATA KENTA, ECHIGO YOSHIAKI, YAMADA MUNENORI, SHIGETA AKIRA, TAKEUCHI KO
• Format: Patent
• Language: English; Japanese
• Published: 04.07.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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 PAI solution having excellent storage stability.SOLUTION: Provided is a uniform polyamide imide (PAI) solution containing an amide-based solvent and a hydrocarbon-based solvent, characterized by the following features: (1) as an acid component of PAI, trimellitic acid is contained in an amount of 70 mole% or more relative to total acid components; (2) a diamine component is at least one selected from 4,4'-diphenylmethanediamine (DMA), 4,4'-diaminodiphenyl ether (ODA), and m-phenylenediamine (MPD); and (3) a ratio of the amide-based solvent relative to the solvent mass is 20 mass% to 70 mass%.SELECTED DRAWING: None 【課題】 保存安定性に優れたＰＡＩ溶液を提供する。【解決手段】アミド系溶媒と、炭化水素系溶媒とからなる均一なポリアミドイミド（ＰＡＩ）溶液であって、以下を特徴とするＰＡＩ溶液。（１）ＰＡＩの酸成分として、全酸成分に対し、トリメリット酸を７０モル％以上含有する。（２）ジアミン成分が４，４′−ジフェニルメタンジアミン（ＤＭＡ）、４，４′−ジアミノジフェニルエーテル（ＯＤＡ）、ｍ−フェニレンジアミン（ＭＰＤ）から選ばれる少なくとも一種である。（３）アミド系溶媒比率が、溶媒質量に対し、２０質量％以上、７０質量％以下である。【選択図】なし