METHOD FOR PRODUCING POLYIMIDE FILM, METHOD FOR PRODUCING POLYIMIDE PRECURSOR, METHOD FOR MANUFACTURING LAMINATE, AND METHOD FOR MANUFACTURING SURFACE MATERIAL FOR DISPLAY

• Main Authors: KOBAYASHI YOSHIHIRO, SAKAYORI KATSUYA, WAKITA KEISUKE, OKADA KODAI, FURUSE AYAKO, TAKAO AYA, KANAZAWA NAHOMI, MAEDA TAKANORI
• Format: Patent
• Language: English; Japanese
• Published: 26.04.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

PROBLEM TO BE SOLVED: To provide a polyimide film which suppresses coloring and has improved transparency.SOLUTION: A method for producing the polyimide film includes the steps of: preparing a polyimide precursor solution; reducing residual monomers in the polyimide precursor solution to obtain a purified polyimide precursor; preparing a polyimide precursor composition containing the purified polyimide precursor and an organic solvent; applying the polyimide precursor composition to a support to form a polyimide precursor coating film; and heating the polyimide precursor coating film to imidize the polyimide precursor.SELECTED DRAWING: None 【課題】着色が抑制され、透明性が向上したポリイミドフィルムを提供する。【解決手段】ポリイミド前駆体溶液を準備する工程と、前記ポリイミド前駆体溶液中の、残留モノマーを低減することにより、精製されたポリイミド前駆体を得る工程と、前記精製されたポリイミド前駆体と有機溶剤とを含有するポリイミド前駆体組成物を調製する工程と、前記ポリイミド前駆体組成物を支持体に塗布して、ポリイミド前駆体塗膜を形成する工程と、前記ポリイミド前駆体塗膜を加熱することにより、ポリイミド前駆体をイミド化する工程と、を含む、ポリイミドフィルムの製造方法。【選択図】なし