Method for producing polybenzoxazole resin

    公开(公告)号:US09890250B2

    公开(公告)日:2018-02-13

    申请号:US14716581

    申请日:2015-05-19

    CPC classification number: C08G73/22

    Abstract: A method for producing a polybenzoxazole resin, in which even when a polybenzoxazole precursor is heat treated at a low temperature, a polybenzoxazole resin that is excellent in mechanical properties, such as tensile elongation, and in chemical resistance, is suppressed in terms of coloration, and is high in transparency can be produced. A polybenzoxazole resin is formed by heating a polybenzoxazole precursor which is obtained by allowing an aromatic diaminediol and a diformyl compound or a dicarboxylic acid dihalide, to react with each other in a solvent containing an amide compound or a urea compound each having a specified structure, at 120° C. to 350° C.

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