Patent ID: 7101496
Filing Date: 2006-09-05
Classification: C08G,G02B,Y10T

Abstract:
1. An optical film comprising at least one resin-layer comprising a thermoplastic norbornene resin formed of a copolymer comprising: a structural unit a represented by formula (1) below: wherein, m is 1, p is 0, and the definitions of X and R wherein, Y represents formula —CH═CH— or formula —CH R provided that said groups R where q represents 0 or an integer of at least 1, and R′ represents an organic group, a plurality of X's present in a molecule of said copolymer being the same or different, and a plurality of Y's present in a molecule of said copolymer being the same or different, wherein the weight ratio (a/b) of said structural unit a to said structural unit b in the copolymer is in the range of 95/5 to 60/40.