Aligning agent for liquid crystal and liquid crystal display element

A technology of liquid crystal aligning agent and polymer, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as damage to liquid crystal orientation, and achieve the effect of good coating and excellent film thickness uniformity

Active Publication Date: 2009-08-26

JSR CORPORATIOON

11 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

But, although the liquid crystal aligning agent that has added silane coupling agent can improve the film thickness uniformity that forms coating film, but easily produces bubble w...

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Method used

By using epoxy compound (B) according to this ratio and using other epoxy compounds according to circumstances, the improvement effect of the applicability of the liquid crystal aligning agent of the present invention can be expected, and the liquid crystal aligning agent of the present invention No disadvantageous formation of air bubbles occurs when applied to a substrate.

In the liquid crystal aligning agent of the present invention, the use ratio of at least one compound selected from the compound represented by the above-mentioned formula (1) and the compound represented by the above-mentioned formula (2) is relative to 100 weight The total amount of said polyamic acid and its imidization polymer is 0.01-100 weight part. The value is preferably 0.01 to 40 parts by weight, more preferably 0.01 to 30 parts by weight, particularly preferably 0.1 to 20 parts by weight. By using the epoxy compound (B) in such a ratio, the liquid crystal aligning agent of the present invention can maximize the advantages of good applicability and excellent film thickness uniformity of the formed coating film, which is preferable.

The diamine used in the synthesis of the imidized polymer contained in the liquid crystal aligning agent of the present invention preferably contains 0.5 mole % or more of the above-mentioned specific diamine (2), more preferably 1 mol% or more, more preferably 3 mol% or more. By using the diamine containing the specific diamine (2) within the above range, it is possible to synthesize an imidized polymer having better solubility in an organic solvent described later, and for this reason, a liquid crystal aligner containing this The type and composition of the organic solvent used can be set in a wide range, which has the advantage of a large degree of freedom in product design, and is preferred.

The diamine used in the synthesis of the polyamic acid contained in the liquid crystal aligning agent of the present invention preferably contains the above-mentioned specific diamine (1) of 0.5 mol % or more with respect to all tetracarboxylic dianhydrides used, more preferably 1 mol% or more, more preferably 3 mo...

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Abstract

The present invention provides an aligning agent for liquid crystal that can forming LCD aligning film with excellent LCD aligning and electrology and will not generate bubbles when coating substrate, good screening characteristics and excellent filmuniformity of coated film. The aligning agent includes (A) 100 weight parts at least one polymer chosen from substance groups of polyamic acid reacted by dianhydride and diamine, and acid imide polymers of the same, and (B) 0.01-100 weight parts specific epoxy radicals compounds represented by the following formula.

Application Domain

Liquid crystal compositionsNon-linear optics

Technology Topic

Chemical compoundLiquid-crystal display +4

Image

Examples

Experimental program(17)

Example Embodiment

[0138] Synthesis example 1

[0139] 109 g (0.50 mol) of pyromellitic dianhydride as tetracarboxylic dianhydride, 98 g (0.50 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride, and 4 as a diamine compound 200g (1.0 mol) of 4-diaminodiphenyl ether was dissolved in a mixed solvent made of 244g of N-methyl-2-pyrrolidone and 2200g of γ-butyrolactone. After reacting at 40°C for 3 hours, an additional 1220g of γ- Butyrolactone, about 4070 g of a solution containing 10% by weight of polyamic acid (A-1) was obtained. The solution viscosity of this solution was 200 mPa·s.

Example Embodiment

[0140] Synthesis Example 2

[0141] Combine 98 g (0.50 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride as tetracarboxylic dianhydride, 109 g (0.50 mol) of pyromellitic dianhydride, and 4, as a diamine compound, 198g (1.0 mol) of 4'-diaminodiphenylmethane was dissolved in a mixed solvent made of 243g N-methyl-2-pyrrolidone and 2190g γ-butyrolactone. After reacting at 40°C for 3 hours, an additional 1210g was added γ-butyrolactone, about 4050 g of a solution containing 10% by weight of polyamic acid (A-2) was obtained. The solution viscosity of this solution was 125 mPa·s.

Example Embodiment

[0142] Synthesis Example 3

[0143] 196 g (1.0 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride as tetracarboxylic dianhydride and 200 g (1.0 mol) of 4,4'-diaminodiphenyl ether as a diamine compound ) Was dissolved in a mixed solvent made of 238g N-methyl-2-pyrrolidone and 2130g γ-butyrolactone, and after reacting at 40°C for 4 hours, 1190g γ-butyrolactone was added to obtain about 3960g containing 10% by weight poly A solution of amic acid (A-3). The solution viscosity of this solution was 210 mPa·s.

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PUM

Property	Measurement	Unit
Solution viscosity	200.0	mPa·s
Solution viscosity	125.0	mPa·s
Solution viscosity	210.0	mPa·s
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Good applicability
Good film thickness uniformity

Slurry composition for forming lithium secondary battery electrode containing cellulose fiber as binder, and lithium secondary battery electrode

ActiveUS20140248537A1Improve homogeneityGood applicabilityNon-metal conductorsElectric discharge heatingElectrical batteryCurrent collector

Owner:NISSAN CHEM IND LTD +1

Motion blur removing method based on close shot remote sensing

InactiveCN106934769ACalculation and recovery results are accurateGood applicabilityImage enhancementImage analysisOptical flow estimationThree dimensional data

Owner:WUHAN UNIV OF TECH

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Aligning agent for liquid crystal and liquid crystal display element

A technology of liquid crystal aligning agent and polymer, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as damage to liquid crystal orientation, and achieve the effect of good coating and excellent film thickness uniformity

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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