Materials for inducing alignment of liquid crystals and liquid crystal optical elements
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United States of America Patent
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Sep 28, 1999
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N/A
app pub date -
May 18, 1998
filing date -
May 18, 1998
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Expired
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Abstract
A polyamic acid derived from an amine component comprising a 2-cyano-1,4-phenylene diamine and a family of diaryl ketones is claimed. The polyamic acids are useful in formation of polyimides, also claimed, and for the optical alignment of liquid crystals and the manufacture of liquid crystal optical elements, also claimed.
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