C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B29C 41/24 (2006.01) B29C 55/12 (2006.01) C08G 73/10 (2006.01) C08L 79/08 (2006.01)
Patent
CA 2603131
Disclosed is an aromatic polyimide film having specific elastic modulus and thermal expansion coefficient. Also disclosed is a method for producing such an aromatic polyimide film. Specifically disclosed is an aromatic polyimide film which is composed of an aromatic polyimide containing not less than 70 mol% of repeating units represented by the following formula (I): (I) while satisfying the following relations (1) and (2): CTEMD <= -11 ~ MiMD + 70 (1) CTETD <= -11 ~ MiTD + 70 (2) wherein CTEMD represents the in-plane thermal expansion coefficient (ppm~K-1) in the machine direction; CTETD represents the in-plane thermal expansion coefficient (ppm~K-1) in the transverse direction; MiMD represents the elastic modulus (GPa) in the machine direction; and MiTD represents the elastic modulus (GPa) in the transverse direction. Also specifically disclosed is a method for producing such an aromatic polyimide film.
L'invention concerne un film de polyimide aromatique ayant un module élastique spécifique et un coefficient de dilatation thermique spécifique. L'invention concerne également un procédé servant à produire un tel film de polyimide aromatique. L'invention concerne précisément un film de polyimide aromatique lequel est constitué d'un polyimide aromatique ne contenant pas moins de 70 mol% de motifs représentés par la formule (I) suivante : (I) tout en satisfaisant aux relations (1) et (2) suivantes : CTEMD <= -11 × MiMD + 70 (1) CTETD <= -11 × MiTD + 70 (2) dans lesquelles CTEMD représente le coefficient de dilatation thermique dans le plan (ppm·K-1) dans la direction de la machine ; CTETD représente le coefficient de dilatation thermique dans le plan (ppm·K-1) dans la direction transversale ; MiMD représente le module élastique (GPa) dans la direction de la machine ; et MiTD représente le module élastique (GPa) dans la direction transversale. L'invention concerne également précisément un procédé servant à produire un tel film de polyimide aromatique.
Ishiwata Toyoaki
Kido Nobuaki
Matsuo Jyuhou
Borden Ladner Gervais Llp
Teijin Limited
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