Production of heat-resistant resin

Abstract

Abstract PURPOSE:A polyamic acid product which can give a cured product excellent in stress relaxation (tensile modulus <=300kg/mm<2>) prepared by reacting a specified tetracarboxylic dianhydride with a diamine. CONSTITUTION:A tetracarboxylic dianhydride component comprising 99-1mol% pyromellitic dianhydride and 1-99mol% tetracarboxylic dianhydride of formula I (wherein X1 is -CO-, -O-, -SO2-, -S-, -CH2-, formula II or formula III), e.g., benzophenonetetracarboxylic dianhydride, is reacted with a diamine component comprising 99.99-95mol% diamine of formula IV (wherein X2 is X1), e.g., 4,4'- diaminodiphenyl ether, and 0.01-5mol% diaminosilane of formula V (wherein n is 0-50 and X3 and X4 are each a hydrocarbon group), e.g., dia minopropylsilane, at 0-100 deg.C.

Inventors

• 👤 Akira Toko
• 👤 都甲　明
• 👤 Toshiro Takeda
• 👤 敏郎 竹田
• 👤 Naoji Takeda
• 👤 直滋 竹田
• 👤 Saburo Iida
• 👤 飯田　三郎

Bibliographic Details