The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2011
Filed:
Dec. 19, 2007
Mineki Hasegawa, Tokyo, JP;
Masatomi Irisawa, Saitama, JP;
Mineki Hasegawa, Tokyo, JP;
Masatomi Irisawa, Saitama, JP;
Adeka Corporation, Tokyo, JP;
Abstract
A polymerizable optically active compound of formula (1) has high helical twisting power. When added to a liquid crystal (LC) composition it achieves required helical pitch without largely impairing the physical and optical properties of the LC composition. The compound is suited to be compounded with a LC material, particularly a cholesteric LC material for making an optically anisotropic element excellent in heat resistance, solvent resistance, transparency, optical characteristics, and LC alignment fixing ability. The compound is also useful to form a LC alignment layer, a LC alignment controlling agent, a coating material, a protective film, etc. Xand Xeach represent a (meth)acryloyloxy group; Yand Yeach represent a single bond, an optionally branched Calkylene 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.