Liquid-crystal copolyethers based on 7-oxa-bicyclo(2,2,1)heptane
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United States of America Patent
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Oct 8, 1991
Issued Date -
N/A
app pub date -
May 10, 1989
filing date -
Sep 15, 1986
priority date (Note) -
Expired
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Abstract
The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more single-ring or condensed-rings cycloaliphatic ethers, comprising the characteristic group; ##STR1## wherein R' is hydrogen and R' is H, a halogen, or an alkyl radical containing a small number of carbon atoms, and which may also be halogen-substituted. If the ether contains one ring only, it contains from 5 to 12 atoms in the ring, and if it contains a condensed-ring system, it contains a total number of from 10 to 18 atoms in the rings. Those copolyethers show a anisotropic behaviour in the molten state, and therefore have liquid-crystal properties.
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