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US 4,743,675 AGranted
Thermotropic cholesteric liquid crystalline polypeptide comprising alpha-benzyl glutamate-alpha-alkyl glutamate copolymer
AssigneeNippon Oil Co., Ltd.
InventorJunji Watanabe
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Abstract
A .gamma.-benzyl glutamate-.gamma.-alkyl glutamate copolymer having the general formula (I) ##STR1## wherein; R is C.sub.10-30 alkyl group, m and n are 50.ltoreq.m+n.ltoreq.2,000 and m/n=80-10/20-90, and benzyl ester unit and alkyl ester unit are either both L-forms or both D-forms.
Claims2
A thermotropic cholesteric liquid crystalline .gamma.-benzyl glutamate-.gamma.-alkyl glutamate copolymer consisting essentially of repeating units represented by the general formula (I) ##STR3## wherein;
- R is C.sub.10-30 alkyl group, m and n are 50<m+n<2,000 and m/n=70-40/30-60, and benzyl ester unit and alkyl ester unit are either both L-forms or both D-forms.
Dependencies are inferred from the claim text.