Method for producing substrate having liquid crystal orientation film for in-plane-switching liquid-crystal display element
A technology of liquid crystal alignment film and transverse electric field, applied in optics, instruments, nonlinear optics, etc., can solve the problems of dust generation, inability to uniformly rub the liquid crystal alignment film, and static electricity.
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[0293] [Preparation of polymer composition]
[0294] 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.
[0295] 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
[0369] Abbreviations used in Examples are shown below.
[0370] (methacrylic monomer)
[0371]
[0372] MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546).
[0373] MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).
[0374] (Organic solvents)
[0375] THF: Tetrahydrofuran
[0376] NMP: N-methyl-2-pyrrolidone
[0377] BC: Butyl cellosolve
[0378] (polymerization initiator)
[0379] AIBN: 2,2'-Azobisisobutyronitrile
[0380] [Measurement of Phase Transition Temperature]
[0381] The liquid crystal phase transition temperature of the polymer obtained in the examples was measured using differential scanning calorimetry (DSC) DSC3100SR (manufactured by Mac Systems).
Synthetic example 1
[0383] MA1 (15.29 g, 46 mmol) and MA2 (56.37 g, 184 mmol) were dissolved in THF (655.1 g), and after degassing with a diaphragm pump, AIBN (1.13 g, 6.9 mmol) was added and degassed again. Then, it was made to react at 60 degreeC for 20 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (7000 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. The polymer had a number average molecular weight of 15,000 and a weight average molecular weight of 40,500.
[0384] The liquid crystal phase transition temperature of the obtained methacrylate polymer was 120°C to 185°C.
[0385] NMP (54.0g) was added to the obtained methacrylate polymer powder (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. BC (40.0g) was added and stirred to this s...
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Abstract
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