| 摘要 |
<p>A polymerizable optically active compound of formula (1) has high helical twisting power and, when added to a liquid crystal composition, achieves a required helical pitch without largely impairing the physical and optical properties of the liquid crystal composition. The compound is suited to be compounded with a liquid crystal material, particularly a cholesteric liquid crystal material to provide a material for making an optically anisotropic element excellent in heat resistance, solvent resistance, transparency, optical characteristics, and liquid crystal alignment fixing ability. The compound is also useful to form a liquid crystal alignment layer, a liquid crystal alignment controlling agent, a coating material, a protective film, and so forth.
wherein X 1 and X 2 each represent a (meth)acryloyloxy group; Y 1 and Y 2 each represent a single bond, an optionally branched C 1-8 alkylene group, an ether linkage, a thioether linkage, -COO-, -OCO-, -OCO-O-, -S-CO-, -CO-S-, an optionally substituted 6-membered ring, an optionally substituted naphthalene ring, or a combination thereof.</p> |
