摘要:
The present invention relates to amine compositions and the preparation of polyimides. The polyimides can be used for inducing alignment of a liquid crystal medium with polarized light in liquid crystal display elements.
摘要:
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.