Patent ID: 9399736
Filing Date: 2016-07-26
CPC Classification: C09K,G02B,G02F

Claim Text:
1. An optically anisotropic substance in which an alignment film, a positive uniaxial phase difference film and a negative uniaxial phase difference film are formed on a substrate in the above order, wherein the positive uniaxial phase difference film is formed of polymerizable liquid crystal composition (A) containing one kind or two or more kinds of achiral polymerizable liquid crystal compounds having two or more polymerizable groups, the negative uniaxial phase difference film is formed of polymerizable liquid crystal composition (B) containing one kind or two or more kinds of achiral polymerizable liquid crystal compounds having two or more polymerizable groups, and one kind or two or more kinds of optically active compounds having a polymerizable binaphthol moiety, and the optically anisotropic substance is formed according to an additional thermosetting treatment step after the negative uniaxial phase difference film is formed by photocuring, and when a glass transition temperature after the negative uniaxial phase difference film is photocured is 85° C. or higher and 115° C. or lower, an additional thermosetting treatment temperature is adjusted to 220° C. or higher and 250° C. or lower, and when the glass transition temperature is higher than 115° C., the additional thermosetting treatment temperature is adjusted to 200° C. or higher and 250° C. or lower.