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US 5,104,572 AGranted
Azo compound and liquid crystal composition containing the same
AssigneeMitsubishi Kasei Corporation
InventorsTetsuo Ozawa, Hisayo Hosokai
Life of this patent
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Abstract
A novel azo compound, which has a high dichroic ratio as well as a high solubility in liquid crystals, and a liquid crystal composition containing the same as disclosed. The liquid crystal composition enables an excellent and clear color display.
Claims18
An azo compound having a dichroism and being represented by the general formula (1):
- ##STR378## wherein R.sup.1 represents a 1-16 carbon alkyl group or ##STR379## group (wherein R.sup.3 represents a 1-16 carbon alkyl group);
- ##STR380## represent each a ##STR381## group optionally substituted with a lower alkyl group or a halogen atom;
- R.sup.2 represents a --OR.sup.3, ##STR382## (wherein R.sup.3 is as defined above and R.sup.4 represents a hydrogen atom or a 1-16 carbon alkyl group), ##STR383## (wherein R.sup.5 represents a hydrogen atom or a 1-16 carbon alkyl group and R.sup.6 represents a hydrogen atom or a 1-16 carbon alkyl or a 1-10 carbon alkoxy group), ##STR384## group;
- and a lower alkyl substituent in ##STR385## may bond to an alkyl group R.sup.3, R.sup.4 or R.sup.5 in ##STR386## of the R.sup.2 group to thereby form a nitrogen-containing aliphatic ring.
1 more element
An azo compound having a dichroism and being represented by the general formula (II):
- ##STR420## wherein R.sup.1 represents a 1-16 carbon alkyl group or a ##STR421## group (wherein R.sup.3 represents an alkyl group);
- ##STR422## represent each a ##STR423## group optionally substituted with an alkyl group or halogen atom;
- R.sup.2 represents an ##STR424## group (wherein R.sup.3 and R.sup.4 represent each a 1-16 carbon alkyl group) or a ##STR425## group (wherein R.sup.6 represents a hydrogen atom or a 1-16 carbon alkyl or a 1-10 carbon alkoxy group).
Dependencies are inferred from the claim text.