POLYIMIDE PRECURSOR FOR SOLID PHASE POLYMERIZATION

• Main Authors: SHIBATA KENTA, HOSODA MASAHIRO, ECHIGO YOSHIAKI, YAMADA MUNENORI, SHIGETA AKIRA, YOSHIDA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 05.09.2019
• 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 polyimide powder having excellent environmental compatibility.SOLUTION: A polyimide powder is characterized by: 1) the polyimide is a solid phase polymer of a salt comprising tetracarboxylic acid or tetracarboxylic acid diester and diamine, in the presence of a solvent of 1 mass% or more and 30 mass% or less relative to the mass of the salt; 2) it is soluble in an amide solvent; 3) it has a weight average molecular weight of 10000 or more by GPC; 4) it has an average particle size in volume by laser diffraction of 1-1000 μm.SELECTED DRAWING: None 【課題】環境適合性が良好なポリイミド粉体を提供する。【解決手段】以下を特徴とするポリイミド粉体。１）ポリイミドが、テトラカルボン酸、またはテトラカルボン酸ジエステルと、ジアミンとからなる塩の、この塩の質量に対し１質量％以上３０質量％以下の溶媒の存在下での固相重合体である。２）アミド系溶媒に可溶性である。３）ＧＰＣによる重量平均分子量が１００００以上である。４）レーザ回折法による体積基準の平均粒径が１〜１０００μｍである。【選択図】なし