Method for producing substrate having liquid crystal orientation film for in-plane-switching liquid-crystal display element
A liquid crystal and group technology, which is applied in the field of manufacturing liquid crystal display elements with excellent afterimage characteristics, and can solve the problems of inability to achieve liquid crystal alignment, inability to uniformly rub the liquid crystal alignment film, and dust generation.
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[0291] [Preparation of polymer composition]
[0292] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.
[0293] In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side-chain polymers capable of exhibiting liquid crystallinity,...
Embodiment
[0423] Abbreviations used in Examples are shown below.
[0424]
[0425]
[0426] MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546).
[0427] MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).
[0428]
[0429] CBDA: 1,2,3,4-cyclobutanetetracarboxylic dianhydride
[0430] PMDA: pyromellitic dianhydride
[0431] BODA: Bicyclo[3.3.0]octane-2,4,6,8-tetracarboxylic dianhydride
[0432]
[0433] DDE: 4,4'-Diaminodiphenyl ether
[0434] DDM: 4,4'-Diaminodiphenylmethane
[0435] DA-3MG: 1,3-bis(4-aminophenyloxy)propane
[0436]
[0437] THF: Tetrahydrofuran
[0438] NMP: N-methyl-2-pyrrolidone
[0439] BC: Butyl cellosolve
[0440] CH 2 Cl 2 : Dichloromethane
[0441]
[0442] AIBN: 2,2'-Azobisisobutyronitrile
[0443] [Synthesis example of polyamic acid and polyimide]
Synthetic example 1
[0444]
[0445] After dissolving MA1 (9.97 g, 30.0 mmol) in THF (92.0 g) and degassing with a diaphragm pump, AIBN (0.246 g, 1.5 mmol) was added and degassed again. Then, it was made to react at 50 degreeC for 30 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (1000 ml), and the resulting precipitate was filtered. This deposit was wash|cleaned with diethyl ether, and it dried under reduced pressure in 40 degreeC oven, and obtained the methacrylate polymer powder.
[0446] NMP54.0g was added to the obtained powder 6.0g, and it stirred at room temperature for 3 hours. A methacrylate polymer solution (M1) having a solid content concentration of 10.0% by weight was obtained. At the moment the stirring was terminated, the polymer was completely dissolved.
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Abstract
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