| abstract |
The invention provides a composition for a polarizing plate, a polarizing plate protective film, a cellulose acylate film, a polarizer, a polarizing plate and a display device, wherein the composition can improve and maintain the durability of the polarizer under high temperature and high humidity for a long time by adding a small amount. A composition for a polarizing plate, a polarizing plate protective film, a cellulose acylate film, a polarizer, a polarizing plate and a display device, which contain a polymer having a partial structure represented by the following ring structure alpha or beta in a molecule. In the ring structures alpha and beta, L 1 Represents a single bond, -C (═ O) -, -C (═ S) -, alkylene or arylene. The moiety is a bond, or a site to which a hydrogen atom, substituent or linking group is bonded. |