Dic Corporation

Kazuki Obi

Hiroshi Hasebe

Masanao Takashima

Fumiaki Kodera

Hiroyuki Itou

Isa Nishiyama

Sayaka Nose

Yutaka Kadomoto

Keisuke Fujisawa

Yoshitaka Saito

Shuuhei Yamamoto

Yoshitaka Saitou

Kouzi Satou

Yuuichirou Tani

A compound and a polymer which can each form a photo-alignment film having excellent ability of controlling alignment, a photo-alignment film obtained using the polymer and an optically anisotropic body and a liquid crystal display element each having the photo-alignment film are provided. A compound represented by the general formula (1). In the formula, P represents a polymerizable group, Z and Zrepresent divalent linking groups, A and Arepresent divalent cyclic groups, and Xto Xeach independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a hydroxy group, a nitro group, a cyano group or an alkyl group having 1 to 40 carbon atoms which may have a substituent, provided that X, X, Xand Xare not simultaneously hydrogen atoms. 

Compound, cured product, polymer, photo-alignment film, optically anisotropic body and liquid crystal display element

An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum &#x394;A (=A1&#x2212;A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.

Liquid crystal alignment layer

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Kita-adachi-gun, Japan

Kazuki Obi