Liquid crystalline materials useful to prepare polymeric films
AssigneeArmstrong World Industries, Inc.
InventorPaul J. Shannon
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Abstract
The present invention concerns novel cholesteric liquid crystalline monomers which are useful to form polymeric materials having unique optical properties.
Claims4
Compounds having the structure ##STR9## where R.sub.1 =H or CH.sub.3, and R.sub.2 =an alkylene chain having from 3-14 methylene or lower alkyl-substituted methylene groups.
Compounds having the structure ##STR10## where R.sub.1 =H or CH.sub.3, A=--R.sub.3 O--, and R.sub.3 =an alkylene chain having from 2-14 methylene or lower alkyl-substituted methylene groups.
Compounds having the structure ##STR11## where R.sub.1 =H or CH.sub.3, A=--R.sub.4 O--, R.sub.4 =an alkylene ether, diether or triether having a total of from 3-14 carbon atoms in the alkylene moieties, provided that the terminal alkylene moiety adjacent the carbonate moiety comprises not less than two carbon atoms, and y=0 or 1.
Dependencies are inferred from the claim text.