| 摘要 |
<p>A cholesteric liquid-crystal composition which contains a compound having a high ?n value and can be oriented in a thick layer; and a circular polarization separation sheet which has a wide reflection bandwidth and can be easily produced. The cholesteric liquid-crystal composition comprises: a compound represented by the formula (1): R<SUP>1</SUP>-A<SUP>1</SUP>-B-A<SUP>2</SUP>-R<SUP>2</SUP> (wherein R<SUP>1</SUP> and R<SUP>2</SUP> each is alkyl, alkylene oxide, H, halogeno, hydroxy, carboxy, (meth)acryloyl, epoxy, mercapto, isocyanate, amino, or cyano; A<SUP>1</SUP> and A<SUP>2</SUP> each is 1,4-phenylene, 1,4-cyclohexylene, 1,4-cyclohexenyl, 4,4'-biphenylene, 4,4'-bicyclohexylene, or 2,6-naphthylene; and B is a single bond, -COO-, etc.); a rod-form liquid-crystalline compound having a ?n of 0.18 or more and two or more reactive groups per molecule.</p> |
