C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 69/32 (2006.01) C08G 69/26 (2006.01) C08J 5/18 (2006.01) C08L 77/00 (2006.01) G02B 1/04 (2006.01)
Patent
CA 2504217
An alicyclic or aromatic polyamide exhibiting a percent transmission of 80 % or above in the wavelength region of 450 to 700nm is produced by using an aramid polymer comprising specific structural units in an amount of 50 mole% or above. Colorless transparent alicyclic or aromatic polyamide films having high rigidity and high heat resistance are provided by using the polyamide. Further, the invention provides various optical members made by using the polyamide or the polyamide films, and polyamide copolymers.
On obtient un polyamide alicyclique ou aromatique présentant un pourcentage de transmission égal ou supérieur à 80 % dans la région de la longueur d'onde comprise entre 450 et 700 nm en utilisant un polymère aramide comprenant des motifs structuraux spécifiques dans une quantité égale ou supérieure à 50 % en mole. On obtient des films polyamides alicycliques ou aromatiques transparents d'une grande rigidité et d'une grande résistance à la chaleur en utilisant le polyamide. L'invention porte, en outre, sur divers éléments optiques obtenus au moyen du polyamide ou des films polyamides et des copolymères polyamides.
Moriyama Hideki
Tsukuda Akimitsu
Smart & Biggar
Toray Industries Inc.
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