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COATING SOLUTION FOR FORMING POLYIMIDE FILM, LIQUID CRYSTAL ALIGNMENT AGENT, POLYIMIDE FILM, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
COATING SOLUTION FOR FORMING POLYIMIDE FILM, LIQUID CRYSTAL ALIGNMENT AGENT, POLYIMIDE FILM, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
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机译:形成聚酰亚胺薄膜,液晶校准剂,聚酰亚胺薄膜,液晶校准膜和液晶显示器元件的涂层解决方案
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摘要
Provided is a coating solution for forming a polyimide film, said coating solution comprising: a polymer of a polyimide precursor obtained by polymerizing a tetracarbonate component and a diamine component, and/or a polyimide formed by the imidization of the polyimide precursor; and a bifunctional compound represented by formula [A] and having a Meldrum's acid structure introduced into each of two amino groups of a diamine compound. Also provided are: a liquid crystal alignment agent comprising said coating solution; a polyimide film obtained by firing a substrate coated using said coating solution; a polyimide film comprising a polyimide in which the polymer is crosslinked using the bifunctional compound represented by formula [A]; a liquid crystal alignment film comprising the polyimide film; and a liquid crystal display element equipped with said liquid crystal alignment film. (In the formula, Y, R1 and R2 are groups specified in claims 1 and 4.)
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