POLYMER FOR OPTICAL FILM, AND OPTICAL FILM INCLUDING THE SAME

摘要

A composition for preparing an optical film, comprising a tetracarboxylic acid dianhydride represented by Chemical Formula 1, a first diamine represented by Chemical Formula 2, and a second diamine represented by Chemical Formula 3, wherein an amount of the second diamine represented by Chemical Formula 3 is equal to or less than 30 mol % based on the total amount of the first and second diamines:;wherein, R1 to R5, n1 to n3 are defined in the specification.

主权项

1. An optical film having an average light transmittance of greater than 50% in a wavelength of 400 nanometers, the optical film prepared from a composition comprising:
a tetracarboxylic acid dianhydride represented by Chemical Formula 1, a first diamine represented by Chemical Formula 2, and a second diamine represented by Chemical Formula 3, wherein an amount of the second diamine represented by Chemical Formula 3 is equal to or less than 30 mol % based on the total amount of the first and second diamines: wherein in Chemical Formulae 1 to 3, R1 and R2 are the same or different, and are each independently a substituted or unsubstituted C4 to C20 alicyclic organic group, or a substituted or unsubstituted C6 to C30 aromatic organic group, wherein the aromatic organic group comprises one aromatic ring, two or more aromatic rings fused together to provide a condensed ring system, or two or more moieties linked through a single bond or through a functional group selected from a fluorenylene group, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O)2—, —Si(CH3)2—, —(CH2)p— wherein 1≦p≦10, —(CF2)q— wherein 1≦q≦10, —C(CH3)2—, —C(CF3)2—, —C(═O)NH—, a substituted or unsubstituted C3 to C10 cycloalkylene group, and a substituted or unsubstituted C6 to C15 arylene group, R3 to R5 are the same or different, and are each independently selected from a C1 to C20 alkyl group, a C6 to C20 aryl group, and a halogen, n1 is an integer from 0 to 5, and n2 and n3 are the same or different, and are each independently an integer from 0 to 4, wherein the tetracarboxylic acid dianhydride represented by Chemical Formula 1 is a combination of 3,3′,4,4′-biphenyl tetracarboxylic dianhydride and pyromellitic dianhydride, and wherein the first diamine represented by Chemical Formula 2 is represented by the following chemical formula: