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Polyimide precursor modified with a dicarboxylic acid anhydride, imidized polyimide and liquid crystal aligning agent using the same
Polyimide precursor modified with a dicarboxylic acid anhydride, imidized polyimide and liquid crystal aligning agent using the same
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机译:用二羧酸酐改性的聚酰亚胺前体,酰亚胺化的聚酰亚胺和使用其的液晶取向剂
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摘要
To provide a polyimide precursor and/or polyimide which has an excellent solubility in various organic solvents, and with which a liquid crystal alignment film can be obtained which is excellent in a rubbing resistance and which is hardly deteriorated even by irradiation with backlight. A polyimide precursor having its terminal amino group modified with at least one alicyclic epoxydicarboxylic acid anhydride selected from the group consisting of compounds of the formulae [1] and [2], or a polyimide obtained by imidizing it: wherein Y is a C1-2 alkylene or an oxygen atom, and R1 is a hydrogen atom or an organic group represented by -X1-X2-X3 , wherein X1 is a single bond or -CH2-, X2 is a single bond or -0-, and X3 is a C1-20 alkyl group, a C1-20 haloalkyl group or a C1-20 alkyl group containing a cyano group.
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