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Light alignment agent, alignment firm and liquid crystal display element using alignment film

A photo-alignment and solvent technology, used in optics, nonlinear optics, instruments, etc., can solve problems such as dust and static electricity, and achieve the effect of reducing coloration

Active Publication Date: 2010-01-27
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been pointed out that the rubbing method can cause problems such as dust and static electricity

Method used

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  • Light alignment agent, alignment firm and liquid crystal display element using alignment film
  • Light alignment agent, alignment firm and liquid crystal display element using alignment film
  • Light alignment agent, alignment firm and liquid crystal display element using alignment film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0198] Hereinafter, although an Example and a comparative example demonstrate this invention, this invention is not limited to these Examples. Pyromellitic anhydride (PMDA, compound (A-1)), 1,2,3,4-cyclobutanetetracarboxylic acid (CBTA, compound (A-14)), compound (2-13) and DATP were obtained by Recrystallization Commercially available compounds were purified and used in experiments. 1,8-diaminooctane, 1,9-diaminononane, and 1,12-diaminododecane were distilled from commercially available products and used. Compound (I-1), compound (II-1), and compound (A-21) are respectively according to Tetrahedron, Vol.60, 9977 (2004), Japanese Patent Publication No. 5-65530 and Japanese Patent Laid-Open No. 58 -109479 bulletin to synthesize. The following compound TPDA and compound (30) were synthesized according to Macromolecules, Vol. 28, 6368 (1995) and JP-A-2004-341030. Compound (X-1) was used in the experiment after recrystallizing a commercial product from ethanol. Compound (3-5-1...

Synthetic example 1

[0219]

[0220] 4,4'-diaminotolanine (compound number I-1; 1.2534g, 6.018mmol) was dissolved in N-methyl-2-pyrrolidone (NMP, 22.5g), on the one hand kept at room temperature or less, On the one hand, pyromellitic anhydride (PMDA, 0.5901 g, 3.009 mmol) and 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBTA, 0.6564 g, 3.009 mmol) were added. After stirring for 2 hours, ethylene glycol monobutyl ether (BC, 22.5 g) was added. The resulting solution had a viscosity of 350 mPa·s. This solution was stirred at 60° C. for about 4 hours to obtain varnish A with a viscosity of 33 mPa·s. The weight average molecular weight of the polyamic acid of this varnish was 45,000, and glass transition temperature (Tg) exceeded 300 degreeC.

[0221] [Synthesis Example 2 to Synthesis Example 7]

[0222]

[0223] With the raw material composition shown in Table 1, polyamic acid varnish B - polyamic acid varnish G were prepared by the method similar to synthesis example 1, and the physical pro...

Synthetic example 8

[0227]

[0228] 1,8-Diaminooctane (DAO) (0.7009 g, 4.858 mmol) was dissolved in NMP (22.5 g), and TPDA (1.7991 g, 4.858 mmol) was added at room temperature. After stirring at 60 degreeC for 2 hours, it cooled to room temperature, BC (22.5g) was added, and the varnish H was obtained. The viscosity of this varnish was 18.7 mPa·s. (Weight average molecular weight: 18,000). In addition, the phase transition point (nematic phase-isotropic phase) was 235°C.

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Abstract

The invention provides an alignment film with good alignment performance and less color. The light alignment agent is composed of a polymer component A with the light alignment ability, a polymer component B having the liquid crystal temperature range during 100 DEG C to 300 DEG C and a solvent; wherein component A is 10wt.% to 90wt.% of the total weight of A and B components; additionally, the solvent is 70wt.% to 99.9wt.% of the total weight of the composition; component A is preferably polyamide acid or polyimide whose main chain has at least one component from the photosensitive groups shown in formula (I) to formula (V) and formula (X); component B is preferably liquid crystal polyamide acid or polyimide whose main chain has straight chain alkylidene structure with 6-20 carbon atoms; and R1, R2 and R3 are aromatic divalent groups.

Description

technical field [0001] The invention relates to an alignment film, a manufacturing method of the alignment film and a liquid crystal display element with the alignment film. Background technique [0002] Liquid crystal display devices are used in various devices such as the monitor of a notebook computer or desktop computer, the view finder of a video camera, and a projection display. Among the various liquid crystal display devices, it has also begun to be used in television (television) recently. In addition, the liquid crystal display element can also be used as an optoelectronics-related element such as an optical printer head, an optical Fourier transform element, or a light valve. The mainstream of existing liquid crystal display elements is to use nematic liquid crystal (nematic liquid crystal) display elements, and the liquid crystal display elements of the following modes have been put into practice: Twisted nematic (TwistedNematic, TN) mode, located near a substra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08G02F1/1337
Inventor 田村典央小口雄二郎
Owner JNC CORP
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