WO2006068197A1 - 液晶配向剤及びそれを用いた液晶表示素子 - Google Patents
液晶配向剤及びそれを用いた液晶表示素子 Download PDFInfo
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- WO2006068197A1 WO2006068197A1 PCT/JP2005/023524 JP2005023524W WO2006068197A1 WO 2006068197 A1 WO2006068197 A1 WO 2006068197A1 JP 2005023524 W JP2005023524 W JP 2005023524W WO 2006068197 A1 WO2006068197 A1 WO 2006068197A1
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- liquid crystal
- polyamic acid
- aligning agent
- crystal aligning
- diamine
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/56—Aligning agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
- C08G73/1078—Partially aromatic polyimides wholly aromatic in the diamino moiety
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
Definitions
- the present invention relates to a liquid crystal aligning agent used when producing a liquid crystal aligning film, and a liquid crystal display element having the liquid crystal aligning film obtained.
- Liquid crystal display elements are currently widely used as display devices that achieve thinness and light weight.
- a liquid crystal alignment film is used to determine the alignment state of the liquid crystal.
- most of the liquid crystal alignment film can be produced by subjecting the surface of the polymer film formed on the electrode substrate to some alignment treatment. .
- Polyimides, polyamides, polyamideimides, and the like are known as polymers used in liquid crystal alignment films, and liquid crystal alignment agents in which these polymers and their precursors are dissolved in a solvent are generally used. Yes.
- a polyamic acid is generally used as a polyimide precursor.
- the most widely used method for orienting a polymer film formed on an electrode substrate is a so-called rubbing process in which the surface of the film is rubbed with a cloth made of rayon or the like under pressure. It is a method of applying. However, in the rubbing process, a part of the film is peeled off, or the surface of the liquid crystal alignment film is damaged by the rubbing process, so-called “film scraping” occurs. In some cases, these abnormalities are considered to be one of the causes of the deterioration of the characteristics of the liquid crystal display element and the reduction of the yield.
- Patent Document 1 Japanese Patent Laid-Open No. 9-185065
- Patent Document 2 JP-A-9-146100
- the rubbing resistance of the coating film is one of the important characteristics, and there is a demand for a liquid crystal aligning agent with less film scraping due to the rubbing treatment. ing.
- the demand for countermeasures against display defects resulting from film scraping of the liquid crystal alignment film has become stricter than before, and it has excellent rubbing resistance.
- the importance of the liquid crystal aligning agent from which a film is obtained is increasing.
- An object of the present invention is to provide a new liquid crystal aligning agent capable of obtaining a good liquid crystal aligning film with little film shaving due to rubbing treatment, and display defects due to film shaving are reduced. It is to provide a liquid crystal display element.
- the present invention is as follows.
- a liquid crystal alignment containing at least one of a polyamic acid obtained by reaction polymerization of a diamine component and a tetracarboxylic dianhydride component and a polyimide obtained by dehydrating and ring-closing the polyamic acid.
- n and m are integers of 0 to 4
- R is a hydroxyl group, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, an alkyl group having 2 or 3 carbon atoms.
- liquid crystal aligning agent which is a diamine having two amino groups at positions 4, 4 ′ in the general formula [1].
- Diamine force represented by the general formula [1] 1, 2 Bis (4-aminophenol) ethyne, 1 1 (4-aminophenol) 2- (4-amino-3-methylphenol) ethyne, 1— 3.
- the compound according to 1 or 2 above which is (4-aminophenyl) -2- (4-amino-3-methoxyphenyl) ethyne or 1- (4-aminophenyl) -2- (4 amino-3-fluorophenyl) ethyne Liquid crystal alignment agent.
- liquid crystal aligning agent according to any one of 1 to 3 above, wherein the diamine component contains 10 to 10 mol% of diamine represented by the general formula [1].
- liquid crystal aligning agent according to any one of 1 to 4 above, wherein at least 10 mol% of the tetracarboxylic dianhydride component is an aromatic tetracarboxylic dianhydride.
- liquid crystal aligning agent according to any one of 1 to 5 above, wherein at least 10 mol% of the tetracarboxylic dianhydride component is a tetracarboxylic dianhydride having an alicyclic structure or an aliphatic structure.
- liquid crystal aligning agent according to any one of 1 to 6 above, wherein the imidization ratio of polyimide obtained by dehydrating and ring-closing polyamic acid is 30% or more.
- a liquid crystal display device having a liquid crystal alignment film obtained from the liquid crystal alignment agent according to any one of 1 to 7 above.
- the liquid crystal aligning agent of the present invention shown in 1 above can obtain a film having excellent rubbing resistance, a liquid crystal aligning film with little film scraping can be obtained. Therefore, a liquid crystal display element having a liquid crystal alignment film obtained from the liquid crystal aligning agent of the present invention can reduce display defects caused by film shaving. Also, by selecting tetracarboxylic dianhydride diamin in combination with diamine of general formula [1], the liquid crystal alignment film exhibiting high voltage holding ratio and low accumulated charge can be obtained by reducing the film's rubbing resistance. Therefore, it is possible to provide a liquid crystal display element in which display defects are reduced and contrast is not easily lowered or burned in. Togashi.
- the liquid crystal aligning agent of the present invention can be obtained by using a specific diamine as a part of the diamine component when the diamine component and the tetracarboxylic dianhydride component are polymerized to form a polyamic acid.
- a liquid crystal aligning agent containing at least one polymer of a polyamic acid hereinafter referred to as a specific polyamic acid
- a polyimide obtained by dehydrating and ring-closing the polyamic acid.
- the liquid crystal aligning agent of the present invention may contain either a specific polyamic acid or a polyimide obtained by dehydrating and ring-closing the polyamic acid, and the specific polyamic acid and the polyamic acid may be dehydrating and ring-closing. Thus, it may contain both of the polyimides obtained.
- the specific diamine has a structure in which one amino group is bonded to each of two benzene rings of a tolan structure (diphenyl), and at the same time, each of the benzene rings has It is a diamine having no substituents other than the amino group or having 1 to 4 substituents in total.
- the use of the specific jamin can reduce film abrasion of the coating during the rubbing process.
- the reason why the film obtained by the liquid crystal aligning agent of the present invention is less likely to be shaved is not necessarily clear, but the partial polymer rigidity derived from the Tran structure and the molecular chain- I think that it is caused by the hacking property. Moreover, it is known that the crosslinking reaction of the acetylene moiety is structurally considered. The crosslinking temperature of acetylene is known to be 350 ° C or higher. On the other hand, the liquid crystal aligning agent of the present invention is good even at a heat treatment of about 220 ° C. Therefore, the effect on film abrasion is not due to the cross-linking reaction of acetylene.
- the specific diamine is represented by the following general formula [1].
- R is a relatively small substituent.
- substituents include a hydroxyl group; an alkyl group having 1 to 3 carbon atoms such as methyl, ethyl, and propyl; methoxy, ethoxy, pro
- examples thereof include an alkoxy group having 1 to 3 carbon atoms such as poxy; an alkenyl group having 2 or 3 carbon atoms such as ether and probe; a norogen atom; and a cyan group.
- an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, and a halogen atom are preferable.
- n and m represent the number of substituents R, and the values are each independently an integer of 0 to 4. Preferred values for n and m are each independently 0 or 1. When n + m is 2 or more, the substituents R may be the same or different.
- substitution positions of the two amino groups are not particularly limited, but from the viewpoints of reactivity with tetracarboxylic dianhydride and liquid crystal orientation when an alignment film is formed, The position of, is preferred.
- diamine component for obtaining the specific polyamic acid other diamine can be used in combination with the diamine represented by the general formula [1].
- the preferable ratio of the diamine represented by the general formula [1] in the diamine component is 10 to: LOO mol%, and is more preferable. Properly is 30 to 100 mole 0/0, more preferably from 50-100 mol 0/0.
- the diamine represented by the general formula [1] may be used in combination.
- diamine component for obtaining the specific polyamic acid other diamines that can be used in combination with the diamine represented by the general formula [1] are not particularly limited, and even if the diamine is one type, it may be two or more types. May be.
- 1,4-diaminocyclohexane 1,3 diaminocyclohexane, 4,4'-diaminodicyclohexylenomethane, 4,4'-diamino-3,3'-dimethinoresinic mouth hexylamine, And isophoronediamine.
- aromatic diamines o-phenylene amine, m-phenylenediamine, p-phenylenediamine, 2,6 diaminotoluene, 2,5 diaminotoluene, 2,4 diaminotoluene, 2,3 diaminotoluene, 1,4 diamino 1-Methoxybenzene, 2,5-Diamino-p-xylene, 1,3-Diamino-l, 4-Chronobenzene, 3,5-Diaminobenzoic acid, 1,4-Diamino 2,5-Dicyclonanobenzene, 4, 4'-Diamino-1, 2 Diphenylethane, 4, 4, 1, Diamino 1, 2, 2'-Dimethylbibenzyl, 4, 4'-Diaminodiphenylmethane, 3, 3, Diaminodiphenylmethane, 3, 4'-Diaminodiphenylmethane, 4, 4 'Diamino 3,3'-dimethyldiphenylme
- Heterocyclic diamines include 2,6 diaminopyridine, 2,4-diaminopyridine, 2,4 diamino-1, 3,5 triazine, 2,7 diaminodibenzofuran, 3,6 diaminocarbazo monoole, 2,4 diamino 6—Isopropynole 1, 3, 5 Triazine, 2, 5 HI, S (4 Amino Phenyl) 1,3,4-oxadiazole and the like.
- o Hue at least 10 mole 0/0 of Jiamin components - Renjiamin, m- Hue - Len Jiamin, p- Hue - Renjiamin, 2, 6 Jiaminotoruen, 2, 5 Jiaminotoruen, 2, 4 Jiamino Toluene, 2, 3 diaminotoluene, 1,4-diamino-2-methoxybenzene, 4, 4, -diaminodiphenylmethane, 3, 3, -diaminodiphenylmethane, 3, 4'-diaminodiphenylmethane, 4, 4'-diamino-3, 3 '-Dimethyldiphenylmethane, 4,4'-diamino-2,2'-dimethyldiphenylmethane, 2,6 diaminopyridine, 2,4-diaminopyridine, 4,4, diaminodiphenylamine, 3,6-diaminaminoamin
- diamine when used as a raw material for polyamic acid or polyimide used as a liquid crystal alignment film, a good rubbing resistance can be obtained by using diamine, which is known to increase the pretilt angle of liquid crystal.
- diamines known to increase the pretilt angle of liquid crystals include long-chain alkyl groups, perfluoro groups, organic groups having aromatic cyclic substituents, organic groups having aliphatic cyclic substituents, steroid skeleton groups, etc. Jamine. Specific examples of such diamines are shown below, but are not limited thereto. In the following formulas [8] to [28], j is an integer from 5 to 20, and k is an integer from 1 to 20. ,
- Tetraforce rubonic acid dianhydride contained in the tetracarboxylic acid dianhydride component for obtaining a specific polyamic acid and its composition are not particularly limited, and a combination of plural kinds of tetracarboxylic acid dianhydrides may be used. .
- aromatic dianhydride pyromellitic dianhydride, 3, 3 ', 4, 4, -biphenyltetracarboxylic dianhydride, 2, 2', 3, 3, -biphenyltetracarboxylic Acid dianhydride, 2, 3, 3 ', 4, biphenyl tetracarboxylic dianhydride, 3, 3', 4, 4, monobenzophenone tetra force rubonic acid dianhydride, 2, 3, 3 ', 4' monobenzophenone tetracarboxylic dianhydride, bis (
- a tetracarboxylic dianhydride having an alicyclic structure or an aliphatic structure is used in at least 10 mol% of the tetracarboxylic dianhydride component.
- a good rubbing resistance can be obtained, and a liquid crystal alignment film having a high voltage holding ratio can be obtained.
- the specific polyamic acid in the present invention is a polyamic acid obtained by reactive polymerization of the diamine component and the tetracarboxylic dianhydride component shown above.
- the reaction method of the diamine component and the tetracarboxylic dianhydride component is not particularly limited, but a method of mixing both in an organic solvent is common.
- a method of mixing a diamine component and a tetracarboxylic dianhydride component in an organic solvent a solution in which the diamine component is dispersed or dissolved in an organic solvent is stirred, and the tetracarboxylic dianhydride component is stirred. Or is dissolved in an organic solvent!
- a method in which a diamine component is added to a solution in which a tetracarboxylic dianhydride component is dispersed or dissolved in an organic solvent examples thereof include a method of alternately adding a carboxylic dianhydride component and a diamine component. In the present invention, these methods may be used. Further, when the tetracarboxylic dianhydride component or diamine component also has a plurality of kinds of compound power, these plural kinds of compounds may be reacted in a premixed state, or may be reacted individually and sequentially.
- the temperature at which the diamine component and the tetracarboxylic dianhydride component are reacted in an organic solvent is usually 0 to 150 ° C, preferably 5 to 100 ° C, more preferably 10 to 80 ° C. It is. The higher the temperature, the faster the polymerization reaction is completed. However, if the temperature is too high, a high molecular weight polymer may not be obtained.
- the reaction can be carried out at any concentration, but if the concentration is too low, it will be difficult to obtain a polymer with a high molecular weight, and if the concentration is too high, the viscosity of the reaction solution will become too high and uniform stirring will occur. Therefore, it is preferably 1 to 50% by weight, more preferably 5 to 30% by weight.
- the initial reaction may be carried out at a high concentration, and then an organic solvent may be added.
- the organic solvent used in the above reaction is not particularly limited as long as the produced polyamic acid is soluble.
- Specific examples include N, N dimethylformamide, N, N dimethylacetamide, N-methyl 2-pyrrolidone, N-methylcaprolatatam, dimethyl sulfoxide, tetramethyl urea, pyridine, dimethyl sulfone, hexamethyl. Examples thereof include sulfoxide and ⁇ -petit-mouthed ratatones. These may be used alone or in combination of two or more.
- a solvent that does not dissolve the polyamic acid may be used by mixing with the above solvent as long as the produced polyamic acid does not precipitate.
- water in the organic solvent inhibits the polymerization reaction and further causes hydrolytic decomposition of the produced polyamic acid, it is preferable to use a dehydrated and dried organic solvent as much as possible.
- the ratio of the diamine component to the tetracarboxylic dianhydride component used for the polymerization reaction of the polyamic acid is such that the tetracarboxylic dianhydride component is 0.8 to 1. 2 is preferable. Similar to the usual polycondensation reaction, the closer the molar ratio is to 1: 1, the higher the molecular weight of the polyamic acid obtained. If the molecular weight of the polyamic acid is too small, the strength of the resulting coating film may be insufficient. Conversely, if the molecular weight of the polyamic acid is too large, the viscosity of the liquid crystal aligning agent produced therefrom will be low.
- the weight average molecular weight of the polyamic acid used in the liquid crystal aligning agent of the present invention is preferably 2,000-500,000, more preferably ⁇ 5,000-300,000.
- the polyamic acid obtained as described above can be used as it is for the liquid crystal aligning agent of the present invention, but it can also be used as a dehydrated ring-closed polyimide.
- it may become insoluble in an organic solvent as conversion to polyimide proceeds, making it difficult to use it as a liquid crystal aligning agent.
- all of the amic acid groups in the polyamic acid may be made into polyimide as long as appropriate solubility is maintained without dehydrating and ring-closing.
- the polyamic acid when the polyamic acid is contained in the liquid crystal aligning agent and when the polyamic acid is dehydrated and ring-closed with polyimide, the latter is the liquid crystal aligning film of the liquid crystal aligning film.
- the rubbing resistance of the coating tends to decrease.
- the specific polyamic acid in the present invention is excellent in the rubbing resistance of the coating even when it is contained in a liquid crystal aligning agent in the form of a polyimide that has been dehydrated and cyclized. Inclusion in the liquid crystal aligning agent after switching is preferable because liquid crystal alignment and voltage holding ratio without impairing rubbing resistance are improved.
- the preferred imidization ratio of the polyimide obtained by dehydrating and ring-closing the specific polyamic acid is 30% or more, more preferably 60% or more, and particularly preferably 80% or more.
- the imidization reaction in which polyamic acid is dehydrated and cyclized is generally thermal imidization in which the polyamic acid solution is heated as it is, or chemical imidization in which a catalyst is added to the polyamic acid solution. Chemical imidization, in which the imidization reaction proceeds, is preferred because the molecular weight of the resulting polyimide is less likely to decrease. [0060] Chemical imidization can be carried out by stirring polyamic acid in an organic solvent in the presence of a basic catalyst and an acid anhydride. The reaction temperature at this time is 20 to 250 ° C, preferably 0 to 180 ° C, and the reaction time is 1 to LOO time.
- the amount of the basic catalyst is 0.5 to 30 mol times, preferably 2 to 20 mol times the amic acid group, and the amount of the acid anhydride is 1 to 50 mol times, preferably 3 to 30 mol times the amic acid group. Molar times. If the amount of basic catalyst or acid anhydride is small, the reaction will not proceed sufficiently, and if it is too large, it will be difficult to remove it completely after the reaction is completed. Examples of the basic catalyst used at this time include pyridine, triethylamine, trimethylamine, tributylamine, trioctylamine and the like. Among them, pyridine is preferable because it has an appropriate basicity for proceeding with the reaction.
- the acid anhydride examples include acetic anhydride, trimellitic anhydride, pyromellitic anhydride, and the like. Among them, use of acetic anhydride is preferable because purification after completion of the reaction is easy.
- the organic solvent the solvent used in the above-described polyamic acid synthesis can be used.
- the imidization rate by chemical imidization can be controlled by adjusting the amount of catalyst, reaction temperature, and reaction time.
- the polyimide solution obtained in this way is used as a poor solvent for stirring the polyimide solution for use in the liquid crystal aligning agent of the present invention. It is preferable to charge and recover the precipitate.
- a poor solvent used for precipitation collection recovery of a polyimide, Methanol, acetone, hexane, a butyl cellosolve, a heptane, a methyl ethyl ketone, a methyl isobutyl ketone, ethanol, toluene, benzene etc. can be illustrated.
- the polyimide precipitated by adding it to a poor solvent can be recovered by filtration and washing, and then dried at normal temperature or reduced pressure at room temperature or by heating. If this powder is further dissolved in a good solvent and reprecipitated 2 to 10 times, the polyimide can be purified.
- This purification step is preferably performed when impurities cannot be completely removed by a single precipitation recovery operation. In this case, it is preferable to use three or more kinds of poor solvents such as alcohols, ketones and hydrocarbons as the poor solvent because the purification efficiency is further improved.
- Polyamic acid can also be collected and purified by the same procedure.
- the solvent used for the polymerization of polyamic acid is not desired to be contained in the liquid crystal aligning agent of the present invention. If unreacted monomer components or impurities are present in the reaction solution, the precipitate may be collected and purified.
- the liquid crystal aligning agent of the present invention can be obtained by dissolving at least one polymer of the specific polyamic acid obtained as described above or a polyimide obtained by dehydrating and ring-closing the polyamic acid in an organic solvent.
- the organic solvent is not particularly limited as long as it can dissolve the contained polymer component.
- Specific examples are N, N dimethylformamide, N, N dimethylacetamide, N-methyl-2-pyrrolidone, N-methylcaprolatatam, 2-pyrrolidone, N ethylpyrrolidone, N vinylpyrrolidone, dimethyl sulfoxide. , Tetramethyl urea, pyridine, dimethyl sulfone, hexamethyl sulfoxide, ⁇ -butyrolatatane, etc., and these may be used alone or in combination.
- the polymer component alone is not dissolved. Even if it is a solvent, it can be mixed with the liquid crystal aligning agent of the present invention as long as the polymer component does not precipitate.
- the coating film uniformity is improved at the time of application to a substrate by mixing a solvent having a low surface tension appropriately, and it is also suitably used in the liquid crystal aligning agent of the present invention.
- solvents include ethyl solvate sorb, butyl cetyl sorb, ethyl carbitole, butinorecanole vitole, ethyl carbitol acetate, ethylene glycolol, 1-methoxy 2-propanol, 1 ethoxy 2-propanol.
- the solid content concentration of the liquid crystal aligning agent of the present invention is preferably 1 to 10% by weight which can be appropriately changed depending on the thickness of the film to be formed. If it is less than 1% by weight, it is difficult to form a uniform and defect-free film. The stability may deteriorate.
- the liquid crystal aligning agent of the present invention contains at least one of a specific polyamic acid, that is, a polyamic acid using a diamine represented by the general formula [1], or a polyimide obtained by dehydrating and ring-closing the polyamic acid.
- a specific polyamic acid that is, a polyamic acid using a diamine represented by the general formula [1]
- a polyimide obtained by dehydrating and ring-closing the polyamic acid a specific polyamic acid
- other polymerized polyamic acid or polyimide may be contained separately.
- it may contain a resin other than polyamic acid or polyimide.
- liquid crystal aligning agent of the present invention a known additive such as a silane coupling agent can be added in order to further improve the adhesion of the coating film to the substrate.
- the liquid crystal aligning agent of the present invention obtained as described above can be filtered, applied to a substrate, dried and baked to form a film, and this film surface is subjected to an alignment treatment by rubbing. Thus, it is used as a liquid crystal alignment film.
- the substrate to be used is not particularly limited as long as it is a highly transparent substrate, and a glass substrate, a plastic substrate such as an acrylic substrate or a polycarbonate substrate, or the like can be used.
- An ITO electrode for driving a liquid crystal From the viewpoint of simplification of the process, it is preferable to use a substrate on which is formed.
- an opaque object such as a silicon wafer can be used as long as it is only a substrate on one side, and in this case, a material that reflects light such as aluminum can be used.
- Examples of the application method of the liquid crystal aligning agent include a spin coating method, a printing method, an ink jet method, and the like. From the viewpoint of productivity, the transfer printing method is widely used industrially. It is also preferably used in a liquid crystal aligning agent.
- the drying process after applying the liquid crystal aligning agent is not necessarily required, but the time from application to baking is constant for each substrate, and in some cases, the baking is not performed immediately after application. ! ⁇ In some cases, it is preferable to include a drying step.
- the drying means is not particularly limited as long as the solvent is evaporated to such an extent that the shape of the coating film is not deformed due to transport of the substrate or the like.
- a method of drying on a hot plate at a temperature of 50 to 150 ° C., preferably 80 to 120 ° C. for 0.5 to 30 minutes, preferably 1 to 5 minutes is used.
- Firing of the coating film formed using the liquid crystal aligning agent can be performed at any temperature of 100 to 350 ° C, preferably 150 ° C to 300 ° C, more preferably 200 ° C. ° C ⁇ 250 ° C is there.
- the liquid crystal aligning agent contains a polyamic acid
- the conversion rate from the polyamic acid to the polyimide changes depending on the firing temperature, but the liquid crystal aligning agent of the present invention does not necessarily need to be 100% imidized.
- the film thickness after firing is too thick, it is disadvantageous in terms of power consumption of the liquid crystal display element, and if it is too thin, the reliability of the liquid crystal display element may be lowered.
- the film obtained as described above can be made into a liquid crystal alignment film by rubbing with a rubbing cloth made of various materials such as rayon, cotton and nylon.
- the liquid crystal display element of the present invention was obtained by preparing a liquid crystal cell by a known method after obtaining a substrate with a liquid crystal alignment film using the liquid crystal aligning agent of the present invention by the method as described above. It is.
- the type of the liquid crystal display element is not particularly limited. Examples of liquid crystal display elements include TN type, STN type, TFT type, lateral electric field type (IPS), vertical alignment type (VA), ferroelectric liquid crystal type, and antiferroelectric liquid crystal type. .
- the rubbing conditions at the time of device preparation are strict and the film is likely to be scraped compared to other liquid crystal display elements! Can be preferably used.
- a pair of substrates on which a liquid crystal alignment film is formed are sandwiched with a spacer of 1 to 30 ⁇ m, preferably 2 to 10 ⁇ m, and the rubbing direction is
- a general method is to install at an arbitrary angle of 0 to 270 °, fix the periphery with a sealant, and inject liquid crystal to seal.
- the method for enclosing the liquid crystal is not particularly limited, and examples thereof include a vacuum method in which liquid crystal is injected after reducing the pressure inside the produced liquid crystal cell, and a dropping method in which sealing is performed after dropping the liquid crystal.
- CBDA 1, 2, 3, 4-cyclobutanetetracarboxylic dianhydride
- TDA 3, 4 Dicarboxy 1, 2, 3, 4-tetrahydro 1-naphthalene succinic acid dihydrate
- 3MDAT 1— (4-Aminophenol) 2— (4-Amino-3-methoxyphenyl) ether
- 3FDAT 1— (4 aminophenol) 2— (4 amino3 fluorophenol) ethyne p— PDA: p phenoldiamine
- ⁇ SPI ⁇ Polyimide obtained by dehydrating and ring-closing polyamic acid.
- the molecular weight of polyamic acid or polyimide was measured by using Senju Science Co., Ltd., a room temperature gel permeation chromatography (GPC) apparatus (SSC-7200), and a Shodex column (KD803, 805).
- the number average molecular weight and the weight average molecular weight used were values converted to polyethylene glycol and polyethylene oxide.
- the imidation ratio of polyimide is determined by dissolving the polyimide in deuterated DMF (dimethyl sulfoxide d).
- CBDA 13.60 g (0.69 mol) as tetracarboxylic dianhydride component and 15.60 g (0.070 mol) 3MDAT as diamine component are mixed in 255 g of NMP and reacted at room temperature for 5 hours to obtain a polyamic acid solution. It was. The polymerization reaction proceeded easily and uniformly.
- the obtained polyamic acid had a number average molecular weight of 16582 and a weight average molecular weight of 32256.
- NMP and BCS were added to 50 g of this polyamic acid solution, and the liquid crystal aligning agent of the present invention was obtained by preparing 6 wt% polyamic acid, 74 wt% NMP, and 20 wt% BCS.
- CBDA13.75g (0.070mol) as tetracarboxylic dianhydride component, p-PDA 4.98g (0.046mol) and DAT4.llg (0.020mol) as diamine component are mixed in 205g NMP and mixed at room temperature. It was made to react for time and the polyamic acid solution was obtained. The polymerization reaction proceeded easily and uniformly. The resulting polyamic acid had a number average molecular weight of 10121 and a weight average molecular weight of 7563.
- NMP and BCS were added to 50 g of this polyamic acid solution, and the liquid crystal aligning agent of the present invention was obtained by adjusting the polyamic acid to 6 wt%, NMP 74 wt%, and BCS 20 wt%.
- CBDA 14.90 g (0.076 mol) as the tetracarboxylic dianhydride component, p-PDA 4.30 g (0.040 mol) and DAT8.30 g (0.040 mol) as the diamine component were mixed in NMP 308 g at room temperature. And reacted for 5 hours to obtain a polyamic acid solution. The polymerization reaction proceeded easily and uniformly. The resulting polyamic acid had a number average molecular weight of 11054 and a weight average molecular weight of 21235. NMP and BCS are added to 50 g of this polyamic acid solution to prepare 4% by weight of polyamic acid, 76% by weight of NMP, and 20% by weight of BCS. Got.
- CBDA7.80g (0.040mol) and PMDA7.00g (0.O32mol) as tetracarboxylic dianhydride components and DAT16.70g (0.080mol) as diamine components were mixed in 290g of NMP and reacted at room temperature for 10 hours.
- NMP N-methyl methacrylate
- DAT16.70g (0.080mol) as diamine components were mixed in 290g of NMP and reacted at room temperature for 10 hours.
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 10454 and a weight average molecular weight of 18772.
- NMP and BCS were added to 50 g of this polyamic acid solution, and the liquid crystal aligning agent of the present invention was obtained by adjusting the polyamic acid to 5 wt%, NMP 75 wt%, and BCS 20 wt%.
- TDA29.90g (0.lOOmol) as a tetracarboxylic dianhydride component
- DAT20.80g (0.lOOmol) as a diamine component
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 17,726 and a weight average molecular weight of 30,398.
- NMP and BCS were added to 50 g of this polyamic acid solution, and the liquid crystal aligning agent of the present invention was obtained by adjusting the polyamic acid to 5 wt%, NMP 75 wt%, and BCS 20 wt%.
- NMP is added to 50 g of the polyamic acid solution obtained in Synthesis Example 7 to dilute the polyamic acid to 5% by weight, and 16.07 g of acetic anhydride and 7.47 g of pyridine are added as an imidization catalyst. Reacted for hours.
- the reaction solution was poured into 625 ml of methanol, and the resulting precipitate was filtered off, thoroughly washed with methanol, and then dried under reduced pressure at 100 ° C to obtain an imidation rate of 92%
- a pale yellow polyimide powder was obtained.
- This polyimide had a number average molecular weight of 16,276 and a weight average molecular weight of 28839.
- CBDA 9.10 g (0.046 mol) as a tetracarboxylic dianhydride component and DAT10.00 g (0.048 mol) as a diamine component were mixed in 176 g of NMP and reacted at room temperature for 5 hours to obtain a polyamic acid solution. .
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 14826 and a weight average molecular weight of 31766.
- CBDA 19.61 g (0. lOOmol) as a tetracarboxylic dianhydride component and P-PDA 10.38 g (0. O96 mol) as a diamine component were mixed in NMP 345 g and reacted at room temperature for 5 hours.
- NMP 345 g a polyamic acid solution was obtained.
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 22382 and a weight average molecular weight of 40395.
- CBDA 19.61 g (0.100 mol) as the tetracarboxylic dianhydride component, DAT 18.1 lg (0. 087 mol) and DADB 2.92 g (0. OlOmol) as the diamine component were mixed in NMP 365 g at room temperature. Reaction was performed for 3 hours to obtain a polyamic acid solution. The polymerization reaction proceeded easily and uniformly. The resulting polyamic acid had a number average molecular weight of 18742 and a weight average molecular weight of 40386. NMP and BCS were added to 50 g of this polyamic acid solution to prepare 6 wt% polyamic acid, 74 wt% NMP, and 20 wt% BCS to obtain the liquid crystal aligning agent of the present invention.
- CBDA 13.60 g (0.69 mol) as tetracarboxylic dianhydride component and 16.80 g (0.074 mol) 3FDAT as diamine component were mixed in 270 g NMP and reacted at room temperature for 21 hours.
- NMP and BCS were added to 50 g of this polyamic acid solution, and the liquid crystal aligning agent of the present invention was obtained by preparing 6 wt% polyamic acid, 74 wt% NMP, and 20 wt% BCS.
- reaction solution was poured into 4 OO ml of methanol, and the resulting precipitate was filtered off, thoroughly washed with methanol, and then dried under reduced pressure at 100 ° C to obtain a light yellow polyimide powder having an imidization rate of 91%. Obtained.
- This polyimide had a number average molecular weight of 8830 and a weight average molecular weight of 15247.
- TDA30.03g (0.lOOmol) as tetracarboxylic dianhydride component
- DATIO.41g (0.Omol) as diamine component
- p-PDA 4.33g 0.040mol
- DADB2.92g (0. OlOmol)
- NMP was added to 50 g, and the polyamic acid was diluted to 5% by weight.
- 16.05 g of acetic anhydride and 7.64 g of pyridine were added as imido catalysts and reacted at 35 ° C. for 3 hours.
- This reaction solution was poured into 625 ml of methanol, and the resulting precipitate was filtered off, washed thoroughly with methanol, and then dried under reduced pressure at 100 ° C. to obtain a light yellow polyimide powder having an imidization rate of 92%. It was.
- This polyimide had a number average molecular weight of 10599 and a weight average molecular weight of 23952.
- CBDA 19.61 g (0. lOOmol) as tetracarboxylic dianhydride component, diamine component P-PDA 10.38 g (0. O96 mol) was mixed in NMP345 g and reacted at room temperature for 5 hours to obtain a polyamic acid solution.
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 22382 and a weight average molecular weight of 40395.
- NMP and BCS were added to 50 g of this polyamic acid solution to prepare 4% by weight of polyamic acid, 76% by weight of NMP, and 20% by weight of BCS, and used as a liquid crystal aligning agent for comparison.
- TDA23 50 g (0.078 mol) as tetracarboxylic dianhydride component and p-PDA 8.65 g (0.080 mol) as diamine component are mixed in 180 g of NMP and reacted at room temperature for 24 hours to give polyamic acid solution Got. 50 g of this polyamic acid solution was diluted to 5% by weight with NMP, and then 14.50 g of acetic anhydride and 6.75 g of pyridine were added as imidization catalysts, and reacted at 35 ° C. for 3 hours. This reaction solution was poured into 625 ml of methanol, and the resulting precipitate was filtered off, washed thoroughly with methanol, and then dried under reduced pressure at 100 ° C.
- This polyimide had a number average molecular weight of 16,276 and a weight average molecular weight of 28839.
- This polyimide powder 3. Og mixed solution of GBL39.5g and BCS7.5g It melt
- tetracarboxylic dianhydride component 19.22 g (0. 98 mol) of CBDA and 19.83 g (0. lOOmol) of DDM as a diamine component were mixed in 221 g of NMP and reacted at room temperature for 24 hours to obtain a polyamic acid solution.
- the polymerization reaction proceeded easily and uniformly.
- the obtained polyamic acid had a number average molecular weight of 20832 and a weight average molecular weight of 36395.
- CBDA 19.61 g (0. lOOmol) as a tetracarboxylic dianhydride component and P-PDAIO. 38 g (0. O96 mol) as a diamine component were mixed in NMP 345 g and reacted at room temperature for 5 hours.
- NMP 345 g a polyamic acid solution was obtained.
- the polymerization reaction proceeded easily and uniformly.
- the resulting polyamic acid had a number average molecular weight of 22382 and a weight average molecular weight of 40395.
- the liquid crystal aligning agent of the present invention obtained in Synthesis Example 1 was spin-coated on a glass substrate with a transparent electrode, dried on an 80 ° C hot plate for 5 minutes, and then heated in a 220 ° C hot air circulation oven for 30 minutes. Baking was performed to form a coating film having a thickness of lOOnm. This coating surface was rubbed with a rayon cloth using a rubbing machine having a roll diameter of 120 mm under the conditions of a roll rotation speed of 700 rpm, a roll traveling speed of 10 mm / sec, and an indentation amount of 0.45 mm to obtain a substrate with a liquid crystal alignment film. .
- A If the rubbing damage is less than 10 rubbing residues.
- B If rubbing damage, there are 11-19 rubbing residues.
- the rubbing damage is 20-29 rubbing residues.
- the liquid crystal aligning agent of the present invention obtained in Synthesis Example 1 was spin-coated on a glass substrate with a transparent electrode, dried on an 80 ° C hot plate for 5 minutes, and then heated in a 220 ° C hot-air circulating oven for 30 minutes. Baking was performed to form a coating film having a thickness of lOOnm.
- the coated surface was rubbed with a rayon cloth using a rubbing machine with a roll diameter of 120 mm under the conditions of a roll rotation speed of 300 rpm, a roll traveling speed of 20 mm / sec, and an indentation amount of 0.5 mm to obtain a substrate with a liquid crystal alignment film.
- the liquid crystal cell was placed between polarizing plates placed in crossed Nicols, and the liquid crystal alignment state immediately after liquid crystal injection was evaluated by visual observation. Thereafter, the liquid crystal cell was heated at 105 ° C. for 10 minutes to perform isotropic phase treatment, and the liquid crystal alignment state after the isotropic phase treatment was visually observed. The results are shown in Table 2 below.
- the liquid crystal aligning agent of the present invention obtained in Synthesis Example 1 was spin-coated on a glass substrate with a transparent electrode, dried on an 80 ° C hot plate for 5 minutes, and then heated in a 250 ° C hot-air circulating oven for 60 minutes. Baking was performed to form a coating film having a thickness of lOOnm. This coating surface was rubbed with a rayon cloth using a rubbing machine with a roll diameter of 120 mm under the conditions of a roll rotation speed of 700 rpm, a roll traveling speed of 10 mm / sec, and an indentation of 0.4 mm to obtain a substrate with a liquid crystal alignment film.
- Example 24 The same evaluation as in Example 24 was performed using the liquid crystal aligning agent of the present invention obtained in Synthesis Examples 2, 5, 7, 8, 12, and 13. The results are shown in Table 3 below.
- the liquid crystal aligning agent of the present invention can provide a film having excellent rubbing resistance, it can be suitably used for various types of liquid crystal display elements that require rubbing treatment in the process of producing the element.
- the liquid crystal display element of the present invention can be used in various devices for displaying characters, moving images, still images, etc., such as liquid crystal displays and liquid crystal televisions.
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Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005800387437A CN101057177B (zh) | 2004-12-22 | 2005-12-21 | 液晶定向剂及使用了该定向剂的液晶显示元件 |
| JP2006549038A JP4779974B2 (ja) | 2004-12-22 | 2005-12-21 | 液晶配向剤及びそれを用いた液晶表示素子 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-370328 | 2004-12-22 | ||
| JP2004370328 | 2004-12-22 |
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| WO2006068197A1 true WO2006068197A1 (ja) | 2006-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/023524 Ceased WO2006068197A1 (ja) | 2004-12-22 | 2005-12-21 | 液晶配向剤及びそれを用いた液晶表示素子 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4779974B2 (ja) |
| KR (1) | KR101208385B1 (ja) |
| CN (1) | CN101057177B (ja) |
| TW (1) | TWI382251B (ja) |
| WO (1) | WO2006068197A1 (ja) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008041960A (ja) * | 2006-08-07 | 2008-02-21 | Nissan Chem Ind Ltd | 電子回路部品の製造方法 |
| JP2009145536A (ja) * | 2007-12-13 | 2009-07-02 | Jsr Corp | 液晶配向剤および液晶表示素子 |
| JP2010101999A (ja) * | 2008-10-22 | 2010-05-06 | Chisso Corp | 液晶配向膜、液晶配向剤および液晶表示素子 |
| WO2013002345A1 (ja) * | 2011-06-28 | 2013-01-03 | 日産化学工業株式会社 | 液晶配向膜の製造方法、液晶配向膜及び液晶表示素子 |
| JP2013173820A (ja) * | 2012-02-23 | 2013-09-05 | Pi R & D Co Ltd | 新規ポリイミド及びそれを含む印刷用組成物 |
| KR101396735B1 (ko) * | 2007-02-23 | 2014-05-26 | 제이에스알 가부시끼가이샤 | 액정 배향제 및 액정 표시 소자 |
| JPWO2013002345A1 (ja) * | 2011-06-28 | 2015-02-23 | 日産化学工業株式会社 | 液晶配向膜の製造方法、液晶配向膜及び液晶表示素子 |
| JP2021172618A (ja) * | 2020-04-24 | 2021-11-01 | 旭化成株式会社 | ジアミン化合物及びその製造方法 |
| WO2026063381A1 (ja) * | 2024-09-17 | 2026-03-26 | 日産化学株式会社 | 液晶配向剤、液晶配向膜、及びそれを用いた液晶表示素子 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI422927B (zh) | 2006-03-16 | 2014-01-11 | Jnc Corp | 光配向膜以及液晶顯示元件 |
| WO2009093709A1 (ja) * | 2008-01-25 | 2009-07-30 | Nissan Chemical Industries, Ltd. | 液晶配向剤、液晶配向膜及び液晶表示素子 |
| KR20100062941A (ko) * | 2008-12-02 | 2010-06-10 | 제이에스알 가부시끼가이샤 | 액정 배향제 및 액정 표시 소자 |
| CN102667594B (zh) * | 2009-12-25 | 2015-02-18 | 日产化学工业株式会社 | 液晶取向处理剂、液晶取向膜以及使用其的液晶显示元件 |
| JP6350852B2 (ja) * | 2013-03-21 | 2018-07-04 | Jnc株式会社 | 液晶配向剤、液晶表示素子、およびテトラカルボン酸二無水物 |
| CN103467985A (zh) * | 2013-09-22 | 2013-12-25 | 株洲时代电气绝缘有限责任公司 | 一种聚酰亚胺薄膜 |
| CN114230791B (zh) * | 2021-12-29 | 2023-10-24 | 山东华夏神舟新材料有限公司 | 本征型低介电含氟聚酰亚胺薄膜及其制备方法 |
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| JPS646924A (en) * | 1987-06-29 | 1989-01-11 | Matsushita Electric Industrial Co Ltd | Electric field effect type liquid crystal display element |
| JPH1115001A (ja) * | 1997-04-30 | 1999-01-22 | Nissan Chem Ind Ltd | 液晶配向処理剤 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3289271B2 (ja) * | 1995-02-13 | 2002-06-04 | 日産化学工業株式会社 | 液晶配向処理剤及びこれを用いた液晶素子 |
| TW448336B (en) * | 1996-07-11 | 2001-08-01 | Nissan Chemical Ind Ltd | Alignment treating agent for a liquid crystal cell |
| JPH10197875A (ja) * | 1997-01-10 | 1998-07-31 | Nissan Chem Ind Ltd | 液晶配向処理剤 |
| KR100601067B1 (ko) * | 1997-12-02 | 2006-07-19 | 닛산 가가쿠 고교 가부시키 가이샤 | 액정 배향 처리제 |
| KR20030020359A (ko) * | 2000-07-07 | 2003-03-08 | 닛산 가가쿠 고교 가부시키 가이샤 | 액정배향처리제 및 이것을 사용한 액정표시소자 |
-
2005
- 2005-12-21 WO PCT/JP2005/023524 patent/WO2006068197A1/ja not_active Ceased
- 2005-12-21 CN CN2005800387437A patent/CN101057177B/zh not_active Expired - Lifetime
- 2005-12-21 JP JP2006549038A patent/JP4779974B2/ja not_active Expired - Lifetime
- 2005-12-21 KR KR1020077011523A patent/KR101208385B1/ko not_active Expired - Lifetime
- 2005-12-22 TW TW094145937A patent/TWI382251B/zh not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS646924A (en) * | 1987-06-29 | 1989-01-11 | Matsushita Electric Industrial Co Ltd | Electric field effect type liquid crystal display element |
| JPH1115001A (ja) * | 1997-04-30 | 1999-01-22 | Nissan Chem Ind Ltd | 液晶配向処理剤 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008041960A (ja) * | 2006-08-07 | 2008-02-21 | Nissan Chem Ind Ltd | 電子回路部品の製造方法 |
| KR101396735B1 (ko) * | 2007-02-23 | 2014-05-26 | 제이에스알 가부시끼가이샤 | 액정 배향제 및 액정 표시 소자 |
| JP2009145536A (ja) * | 2007-12-13 | 2009-07-02 | Jsr Corp | 液晶配向剤および液晶表示素子 |
| JP2010101999A (ja) * | 2008-10-22 | 2010-05-06 | Chisso Corp | 液晶配向膜、液晶配向剤および液晶表示素子 |
| WO2013002345A1 (ja) * | 2011-06-28 | 2013-01-03 | 日産化学工業株式会社 | 液晶配向膜の製造方法、液晶配向膜及び液晶表示素子 |
| JPWO2013002345A1 (ja) * | 2011-06-28 | 2015-02-23 | 日産化学工業株式会社 | 液晶配向膜の製造方法、液晶配向膜及び液晶表示素子 |
| JP2013173820A (ja) * | 2012-02-23 | 2013-09-05 | Pi R & D Co Ltd | 新規ポリイミド及びそれを含む印刷用組成物 |
| JP2021172618A (ja) * | 2020-04-24 | 2021-11-01 | 旭化成株式会社 | ジアミン化合物及びその製造方法 |
| JP7576926B2 (ja) | 2020-04-24 | 2024-11-01 | 旭化成株式会社 | ジアミン化合物及びその製造方法 |
| WO2026063381A1 (ja) * | 2024-09-17 | 2026-03-26 | 日産化学株式会社 | 液晶配向剤、液晶配向膜、及びそれを用いた液晶表示素子 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4779974B2 (ja) | 2011-09-28 |
| TWI382251B (zh) | 2013-01-11 |
| CN101057177B (zh) | 2010-06-02 |
| TW200634411A (en) | 2006-10-01 |
| CN101057177A (zh) | 2007-10-17 |
| KR101208385B1 (ko) | 2012-12-05 |
| JPWO2006068197A1 (ja) | 2008-06-12 |
| KR20070087565A (ko) | 2007-08-28 |
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