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AROMATIC DIAMINES WITH A PHOTOREACTIVE AROMATIC SIDE GROUP, POLYAMIC ACID PHOTO-ALIGNMENT LAYERS WITH THEM AND METHOD FOR PREPARING LIQUID CRYSTAL CELLS
AROMATIC DIAMINES WITH A PHOTOREACTIVE AROMATIC SIDE GROUP, POLYAMIC ACID PHOTO-ALIGNMENT LAYERS WITH THEM AND METHOD FOR PREPARING LIQUID CRYSTAL CELLS
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机译:具有光反应性芳族侧基的芳族二胺,具有其的多聚酸光对准层以及制备液晶池的方法
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摘要
The present invention relates to photo-alignment layers from polyamic acid with a photoreactive aromatic side group. More specifically, the present invention relates to novel polyamic acid photo-alignment layers prepared by the solution polymerization of acid dianhydrides which comprises alicyclic acid dianhydrides at certain ratio or more and aromatic diamines which comprises aromatic diamines with a photoreactive aromatic side group at certain ratio or more and the preparation method thereof, and the preparation method of aromatic diamines with novel aromatic side group. Said polyamic acid photo-alignment layers provide excellent heat- resistance, surface hardness, transparency and liquid crystal alignment property for polarized UV light.
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