OPTICAL MEDIA COMPRISING POLYARYL FILM

摘要

An optical media comprising a polymeric material film, characterized in that said polymeric material is a polyester obtained from a 9,9-bis(4-hydroxyphenyl)fluorene derivative and a mixture of terephthalic acid and isophthalic acid derivatives, said polymeric material having a glass transition temperature higher than 315°C and a yellowing coefficient Yc lower than 0.0060.