POLYIMIDE PRECURSOR, POLYIMIDE, POLYIMIDE FILM, VARNISH, AND SUBSTRATE

World Intellectual Property Organization Patent

APP PUB NO WO-2015053312-A1
SERIAL NO

PCTJP2014076943

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Abstract

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This polyimide precursor comprises: a tetracarboxylic acid component including a norbornane-2-spiro-α-cyclopentanone-α'-spiro-2''-norbornane-5,5'', 6, 6''-tetracarboxylic dianhydride or a derivative thereof; and a diamine component including diamine or a derivative thereof. The polymide precursor is characterized by the norbornane-2-spiro-α-cyclopentanone-α'-spiro-2''-norbornane-5,5'', 6, 6''-tetracarboxylic dianhydride having a peak area ratio for a specific peak of at least 60%, in a gas chromatograph obtained by gas chromatography analysis.

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Patent Owner(s)

Patent OwnerAddress
UBE INDUSTRIESJPYAMAGUCHI JAPAN

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Inventor(s)

Inventor Name Address
HISANO NOBUHARU UBE-SHI
OKA TAKUYA KYOTO
KOHAMA YUKINORI UBE

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