Method for producing polybenzoxazole resin
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United States of America Patent
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Feb 13, 2018
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app pub date -
May 19, 2015
filing date -
May 21, 2014
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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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