Back to results
US 4,528,113 AGranted
Anthraquinone dye and liquid crystal composition containing the dye
AssigneesMitsubishi Chemical Industries Limited, Hitachi, Ltd.
InventorsShuji Imazeki, Akio Mukoh, Mikio Sato, Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama
Life of this patent
Estimating the term…
Abstract
An anthraquinone dye and a liquid crystal composition containing the dye are disclosed. The liquid crystal composition is preferably used in an electro-optic cell which enables a good color display utilizing the guest-host effect of the liquid crystal.
Claims9
An anthraquinone dye represented by the formula (I) ##STR81## wherein R.sup.1 is alkyl having 1 to 9 carbon atoms;
- alkoxy-alkyl;
- ##STR82## wherein R.sup.3 is hydrogen, alkyl having 1 to 9 carbon atoms, alkoxy having 1 to 9 carbon atoms or cycloalkyl which may be substituted;
- or ##STR83## wherein R.sup.4 is hydrogen, alkyl having 1 to 9 carbon atoms, alkoxy having 1 to 9 carbon atoms, alkoxyalkyl, ##STR84## wherein R.sup.5 is hydrogen, alkyl having 1 to 9 carbon atoms or alkoxyalkyl, halogen or dialkylamino, and m is an integer of 1 to 3, and R.sup.2 is alkyl 1 to 18 carbon atoms, alkoxyalkyl, aryl which may be substituted, cyloalkyl, furfuryl, aralkyl or allyl.
A liquid crystal composition containing an anthraquinone dye represented by the formula (I) ##STR98## wherein R.sup.1 is alkyl having 1 to 9 carbon atoms;
- alkoxy-alkyl;
- ##STR99## wherein R.sup.3 is hydrogen, alkyl having 1 to 9 carbon atoms, alkoxy having 1 to 9 carbon atoms or cycloalkyl which may be substituted;
- or ##STR100## wherein R.sup.4 is hydrogen, alkyl having 1 to 9 carbon atoms, alkoxy having 1 to 9 carbon atoms, alkoxyalkyl, ##STR101## wherein R.sup.5 is hydrogen, alkyl having 1 to 9 carbon atoms, alkoxy having 1 to 9 carbon atoms or alkoxyalkyl, halogen or dialkylamino, and m is an integer of 1 to 3, and R.sup.2 is alkyl having 1 to 18 carbon atoms, alkoxyalkyl, aryl which may be substituted, cycloalkyl, furfuryl, aralkyl or allyl.
Dependencies are inferred from the claim text.