TW580513B - Oriented film material with low pre-tilt angle - Google Patents

Abstract

A diamine-containing polyamic acid oriented film material, is obtained by adding a phenyldiamine in a liquid crystal oriented dianhydride followed by a polymerization reaction, which has good coating properties, adhesion power, and stability. After the polyamic acid oriented film is coated, it is baked at a high temperature for a ring-closing reaction to form a polyimide oriented film, and the pre-tilt angle of the film can be controlled to be less than 2 degrees in order to achieve a low pre-tilt angle effect, thereby being able to be applied on a high duty TN liquid crystal display.

Description

Printing bag 580513 A7 ** B7 by the Central Standards Bureau of the Ministry of Economic Affairs of the People ’s Republic of China 5. Description of the invention (1) The liquid crystal display has a small size, light weight, low voltage drive, low power consumption, easy to carry, good display quality and mass production These advantages are the mainstream of modern flat panel displays. It is applied to different types of liquid crystal displays. Due to different requirements of liquid crystal specifications, alignment films with different pretilt angles need to be matched with them. The alignment film for a conventional low duty twisted nematic (TN) type liquid crystal display has a pretilt angle of 2-4 degrees. However, high duty twisted nematic liquid crystal displays need to use alignment films with lower pretilt angles to increase the slope of the voltage-transmittance curve in order to improve the duty ratio and contrast. .- The most important requirements of an alignment film are pretilt angle, coatability and alignment. These factors have a direct relationship with the structure and manufacturing process. The reason for the pre-tilt angle is to suppress the bright rings in the liquid crystal display. If the display has reverse-twist domains, it will open a disclination loop, which will reduce the contrast. Good or bad coatability will affect the uniformity of film thickness and the generation of pin holes. If the thickness of the film is not uniform or holes are generated, the current may increase, or even a short circuit may occur. The alignment is the result of the interaction between the alignment film and the liquid crystal material. When the alignment is not good, bright rings will be generated and become a missing point. Alignment film materials can be divided into twisted nematic liquid crystal displays, super twisted nematic (J (STN)) liquid crystal displays, and thin film transistor (TFT) liquid crystal displays due to different product applications. Important characteristics of alignment films include Alignment, coating, brushing resistance, pretilt angle, etc. In order to meet the requirements of alignment, the traditional alignment film uses phenyl dianhydride as one of the materials, but its coating and brushing resistance are not good. Causes low yield and excessive dust in the clean room. In order to solve the above problems, European patent EP708 149-A and Japanese patent ____3_ This paper size applies to Chinese national standards (CNS> A4 specification (210X297 mm) 83.3.10,000 (Please read the notes on the back before filling this page)

Yin Sang 580513 A7 B7, Shellfish Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs 5. Description of the Invention (2) JP06 1 80448-A An attempt was made to add a siloxane copolymer to the alignment film to increase its transparency and brush resistance. However, because the polarity of the siloxane functional group is relatively large, it has an impact on the problem of voltage driving. Japanese patent JP07287235-A adds a linear structure to the alignment film, but its pretilt angle booster is only suitable for super twisted nematic liquid crystal displays. European patent EP68341 8-A attempts to control the pretilt angle of the alignment film with UV light, and introduces some photosensitive resin into the alignment film. The disadvantage is that up to now, a very stable alignment film cannot be obtained, often with time. And the temperature caused. LCD problems. In addition, the European patent EP625722-A attempts to replace the conventional alignment film with a surface-treated silicone (silia), but its disadvantage is that it is not easy to mass-produce silicone non-high molecular materials. Japanese patent JP0618045 1-A uses a polyamide-imide alignment film to apply to a chiral smetic liquid crystal display, but its mass production has not yet been commercialized. Therefore, the conventional alignment film material does not have a low pretilt angle and cannot be applied to high-order twisted nematic liquid crystal displays. In view of the shortcomings of conventional alignment film materials, one object of the present invention is to provide an alignment film material with a pretilt of less than 2.0 degrees, which has good coating properties, adhesion, and stability, and can be applied to high-order twisting directions. LCD display. Another object of the present invention is to provide a polyamic acid alignment film material having a low pretilt angle for aligning liquid crystal materials, which can meet the commercial requirements of the alignment film having abrasion resistance and high transparency. A secondary object of the present invention is to provide a polyamic acid having a low pretilt angle for liquid crystal materials, which can be manufactured by an industrial method and meets the requirements of mass production. Another object of the present invention is to provide a method for preparing a novel polyamic acid alignment film material, which is based on dianhydride and benzene _____4_ This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 83.3. 10,000 (please read the precautions of the memorandum before filling in this page) ^ 910, * • 11. 580513 A7 B7___ "Five shots" reputation J] | "Okay". Another object of the present invention is to provide a The high-order twisted nematic liquid crystal display using polyamic acid as a novel alignment film material has a better effect of low pretilt angle, making the order larger and the contrast larger, which is suitable for various modern computer products. For the purpose of previous disclosure, the present invention relates to a novel polyamic acid alignment film material used in a liquid crystal display and a method for making the same. According to the present invention, an alignment film material capable of generating a pretilt angle of less than 2.0 degrees is provided with the following repetitions Unit of polyamic acid,

Among them, R is a tetracarboxylic acid group, and the ratio of X to y is between 0.8 and 1.2, and the suitable four acid group structure is, for example: (Please read the precautions on the back before filling this page) Order

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one OH r <\ ι / Η

Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs e / v (g)

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OH ο 83.3.10,00. This paper scale is applicable to China National Standards (CNS) A4 scale (210X297 male) 580513 A7 B7 V. Description of the invention (4 ⑴ -C- Η〇-ίΓ 〇

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• c—; -〇H The alignment film material of the present invention introduces a non-polar acid anhydride functional group into the polymer chain, resulting in a rigid polymer structure, which can improve abrasion resistance, reduce brush marks, and increase transparency. In addition, the alignment film material of the present invention is a polymerization reaction of non-polar dianhydride and phenylbisamine, preferably a condensation polymerization reaction, to generate a polyamidic acid solution containing the bisamine, which is to be coated on the polyamidic acid. After the substrate, the polyimide is formed by ring closure through high temperature baking. The non-polar phenyl diamine used in the polymer of the present invention is 4,4, bis (4-aminophenoxy) biphenyl (4,4'-bis (4-amino-phenoxy) biphenyl), which The structure is as follows: in · m ......-:-i · ------i-1— ml m-»il—-Repeat 1V —II--· 11? Li 'i 4-4 -I w (Please read the notes on the back before filling out this page) Printed by the Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs

The dianhydride in the present invention may be any conventional non-polar rigid structure, and its optional structure is, for example: This paper size applies the Chinese National Standard (CNS) A4 grid (210X297 cm) 83. 3.10,000 580513 Α Β J5L &gt;

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(Please read the precautions on the back before filling in this page) 0 ml— ......... In 1 nffn · ， — mn · 1ιι &gt; 1 、 -Beijing Consumer Cooperatives, Central Standards Bureau, Ministry of Oral Affairs and Economy Printing bag (m

c \ L ·. The molar ratio of the dianhydride to bisamine is 0.8 to 1.2 in order to make the polyamic acid have proper molecular weight distribution and strength. The closer the molar ratio of dianhydride to bisamine is to 1, the larger the molecular weight is' sticky_1_ This paper size applies the Chinese National Standard (CNS) A4 standard (210X297 mm) 83.3.10,000 Printed by the Industrial and Consumer Cooperatives 83. 3.10,000 580513 A7 ___: __ B7_ V. The invention says that the higher the p (6) degree. When the molar ratio of dianhydride to bisamine is less than 1, an appropriate amount of end cap functional group can be added to make up for the difference and reduce the oxidation caused by the molar ratio not equal to 1. The suitable end-reactive functional group is selected from phthalic anhydride, maleic anhydride, aniline and cyci-heXyi amine, etc. of the alignment film material of the present invention. In order to match the processability, the solid content is diluted with an organic solvent to between 4% and 10% by weight to adjust the viscosity to facilitate subsequent alignment film processing processes. The applicable organic solvent is selected from the group consisting of n-methyl pyrrolidone (NMP); m-cresol (m-Cresol); 7-butyllactone (r-butylactone); N, N-di N, N-dimethyl acetamide (DMAC); N, N-dimethyl formamide (DMF); ethylene glycol monobutyl ether (BC) Diethylene glycol monoethyl ether (EC) and mixtures thereof, in which the amount of ethylene glycol monobutyl ether and diethylene glycol monoethyl ether should be controlled below ninety percent by weight. Benximin also provides a method for preparing a polyamic acid alignment film material, which is obtained by polymerizing a dianhydride and two phenylbisamines, preferably by a condensation reaction. The time required for the polymerization reaction to form polyamic acid is between 3 minutes and 24 hours, and a more suitable time is between 10 minutes and 6 hours. The temperature required for the polymerization is between -20 ° C and 12CTC, and a more suitable temperature is between KTC and 60 ° C. After the completion of the polymerization reaction, polyamic acid is obtained, the degree of polymerization of which is 10 ~ 5, 000, the suitable degree of polymerization of the car parent is 40 ~ 250, the weight average molecular weight is 2,000 ~ 2,000,000, and the more suitable weight average molecular weight is 8 〇〇〇〜 ---- Only the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page) Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Packing 580513 A7 B7 V. Description of the invention (7) 50,000 〇 If necessary in the production method of the present invention, before adding phenylbisamine, aeration may be carried out by nitrogen, and then it may be evacuated, or even repeated several times to remove the reaction vessel. Water vapor and oxygen. Thereafter, the dianhydride can be added in portions, such as three times to increase the molecular weight and viscosity of the polymer. In addition, in order to increase the polymerization degree and reduce the reaction time of the polymerization reaction of the present invention, a part of catalyst may be added. The applicable catalyst is selected from triethylamine (TEA), diethylamine, n-butyl · amine (n-butylamine); and D than pyridine. The function of the catalyst is to adjust the pH of the solution and have a catalytic function, which can increase the polymerization degree and viscosity and reduce the reaction temperature. The solid content of the polyamic acid during the polymerization reaction, that is, the weight percentage of the polymer relative to the solvent should be between 10% and 30%. After the reaction, in order to adjust the viscosity or dilution to control the film thickness, the solid content should be adjusted to between 4% and 10%. The step of generating amidine imine from the reaction of polyamic acid requires dehydration and ring closure. The commonly used method is high-temperature cyclization. The cyclization temperature is between 150t and 400 ° C. The more suitable cyclization temperature is between 180 ° C and 320 ° C. The cyclization time is between 3 minutes and 6 hours. Alignment membrane material To improve the adhesion of the alignment membrane, a small amount of silane coupling agent can be added. The commonly used silane coupling agent is selected from 3-aminopropyl trimethoxy silane. ); 3-aminopropyl triethoxy silane; 2-amino nopropyl trim ethoxy silane; 2-aminopropyl paper scale applicable Chinese National Standard (CNS) 8 4 grids (210x297 male thin) 83. 3.10,000 I .--------% · * 7 ----- IT ------ (please 闰Read the notes on the reverse side and fill in this page again.) Printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs, printed 580513 A7 B7 V. Invented (8) 2-aminopropyl triethoxy silane and its mixture. Therefore, the polymerization reaction method for preparing a polyamic acid alignment membrane material according to the present invention is as follows. First, nitrogen gas is introduced into the stirring reaction tank, and then the air is extracted by means of air extraction. This step is repeated three times to remove water vapor in the reaction container. And oxygen, then 4,4'-bis- (4-aminophenoxy) biphenyl is added, and a solvent is added to dissolve, and the dianhydride is added after stirring. In order to increase the molecular weight and viscosity when adding dianhydride, it can be divided into three additions, and the total mole number of dianhydride is maintained at 0.8. To 1.2 · (molar ratio). In order to increase the molecular weight at this time, a small amount of catalyst such as triethylamine can be added, and the reaction temperature is controlled at a fixed temperature, and the reaction time is 3 minutes to 24 hours. After that, purification work is performed. The precipitation method uses a non-solvent for precipitation reaction to separate polyamic acid from the solvent and impurities. The non-solvent can be water, acetone, toluene, etc. The precipitate is washed with electronic-grade water, acetone, toluene, etc., and dried at a high temperature of 170 ° C. Then, by diluting, for example, adding a solvent such as n-methylpyrrolidone, and adding a silane coupling agent to make the solid content and viscosity reach an appropriate level, a precursor of an alignment film with an appropriate film thickness after baking can be obtained. &gt; Therefore, the present invention provides an alignment film material having a liquid crystal material arranged at a low pretilt angle, which can be applied to an alignment film by a commercial coater such as blade coating, spin coating, etc. , In line with industrial alignment film modulation requirements. In order to determine that the novel alignment film material of the present invention can produce an alignment film with a low pretilt angle, the manufacture of the liquid crystal cell and the test of the pretilt angle are used to test that the alignment film material of the present invention has a low pretilt angle characteristic. The production of liquid crystal samples is based on two sheets of indium. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 cm). 83. 3.10,000 (Please read the precautions on the back before filling this page) -Awle, Order 580513 A7 B7_ V. Description of the invention (9) After the antimony oxide (1TO) glass is rinsed, the surface is coated with the alignment film material of the present invention. The coating method may be doctor blade coating or spin coating, and pre-baked. Bake at high temperature to form a polyimide alignment film. After cooling and rubbing the bristles, the liquid crystal cell is assembled and filled with liquid crystal, and the pretilt angle tester (Tilt Bias Angle Tester, TBA) is used to test the pretilt angle. If the measured pretilt angle is less than 2 degrees, the low pretilt angle required by the present invention can be achieved. Therefore, it can be proved by this method that the alignment film material of the present invention can indeed produce a low pretilt angle. The principle of the invention's alignment film material can achieve a low pretilt angle is that due to the non-polar tetracarboxylic acid group, after the formation of polyimide and friction with the bristles, a regular arrangement occurs, so that when this alignment film and the liquid crystal material contact, The liquid crystal material is arranged in a forward direction. Through a specially designed phenylbisamine, the pretilt angle can be controlled below 2 degrees, and the effect of low pretilt angle is achieved. The operating voltage is larger, and the steepness of the voltage-penetration curve is relatively steep. Large, the order increases and the contrast increases. The following examples are used to further illustrate the preparation process of the present invention and the measured effect of the low pretilt alignment film to make the applicant of the present invention more specific. These embodiments only enable the skilled person to clearly understand the technical content of the method of the present invention, and can be implemented accordingly from M, rather than to limit the scope of protection to which the present invention should be entitled. Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) Line * -® · Example 1 In a 1-liter four-necked reaction flask, insert the condenser tube, thermometer, and Feed tube and stirring rod, pass nitrogen gas, add 8.727g of 4,4'-bis (4-aminophenoxy) biphenyl and 70g of n-methylpyrrolidone solvent, stir for about 10 minutes, add 2.091g of white spoon Biphenyl tetracarboxylie dianhydride. Repeat this step twice, and add 15g of n-methylpyrrolidone after the last addition. The size of the paper is in accordance with Chinese National Standard (CNS) A4 (210X297 mm). 83.3.10,000 580513 A7 —_____ 二 _B7_ V. Description of the invention (10) Stir for 3 hours' to precipitate with a large amount of toluene to obtain a solid, which is confirmed by IR spectrum as polyamic acid. The structure of the repeating unit is as follows Shown: (j) Η is the trapeze ^ ^ 0H 〇 〇 After adding 46.25g of ethylene glycol butyl ether and 1 38.75g of n-methylpyrrolidone 'O.lg of 3-aminopropyltrimethoxysilane, stir for 1 hour, A light yellow polyamidic acid solution was obtained with a viscosity of 30C.P · and a solid content 7.5%, measured for pretilt angle was 1.42. Example 2 In a 1 liter four-neck reaction flask, a condenser tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen gas was passed through. 8.153 g of 4,4'-bis (4-aminophenoxy) Benzene and 70g of n-methylpyrrolidone solvent, stir for about 10 minutes, add 2.282g of benzophenone tetracarboxylic dianhydride (3,3% 4,4'benzophenone tetracarboxylic dianhydride), repeat this step 2 times, and finally 1 After the second addition, 15g of n-methylpyrrolidone was added and stirred for 6 hours. A large amount of toluene was precipitated to obtain a solid, which was confirmed as IR by the IR spectrum. The structure of the repeating unit is as follows:

---------- Ϊ, (Please read the precautions on the back before filling out this page) Ordering line • L9. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs

After adding 46.25g of ethylene glycol butyl ether and 1 38.75g of n-methylpyrrolidone, O.lg of 3-aminopropyltrimethoxysilane, and stirring for 1 hour to obtain a pale yellow polyamino acid solution with a viscosity of 80% ;: 2., the solid content is 7.5%, and its pretilt angle is 1.86 17 This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 83. 3.10,000 580513 A7 B7 V. Description of the invention (11 ) Degrees. Example 3 In a 1-litre four-neck reaction flask, a condenser tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen gas was passed in. 8.178 g of 4,4'-bis (4-aminophenoxy) biphenyl was added. And 70g of n-methylpyrrolidone solvent, stir for about 10 minutes, add 2.273g of 4,4'-oxydiphthalic anhydride, repeat this step 2 times, and add the last one After the addition, 15 g of n-methyl D was added for 6 hours and precipitated with a large amount of toluene to obtain a solid, which was confirmed by IR spectrum to be polyamic acid. The structure of the repeating unit is as follows: II -C-, / 〇xr ^ rc-NK Ο

(Please read the precautions on the back before filling in this page) H01 r 〇 Printed with the addition of 90g ethylene glycol butyl ether and 270g n-methylpyrrolidone, O.lg of 3-amine Glyceryl silane was stirred for 1 hour to obtain a light yellow polyamidic acid solution with a viscosity of 40 C.P., a solid content of 4%, and its pretilt angle was 1.2 degrees. Example 4 In a 1 liter four-necked reaction flask, a condenser tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen gas was passed in. 8.377 g of 4,4'-bis (4-aminophenoxy) biphenyl was added. And 70g of n-methylpyrrolidone solvent, stir for about 10 minutes, add 1.867g of biphenyltetracarboxylic dianhydride and 0.240g of benzophenonetetracarboxylic dianhydride, repeat this step 2 times, and finish the last addition Then 15g of n-methylpyrrolidone was added, stirred for 3 hours, and precipitated with a large amount of toluene to obtain a solid, which was confirmed to be polyamic acid by IR spectrum. The structure of the repeating unit is as follows: T nn The paper size is suitable for China National Standard (CNS) A4 Specification (210X297mm) 83. 3.10,000 580513 Printed by Shellfish Consumer Cooperative of Central Standards Bureau of Ministry of Economic Affairs A7 B7

After adding 58.75 g of ethylene glycol butyl ether and 1 76.25 g of n-methylpyrrolidone '0.1 g of 3-aminoglycyltrimethoxy sand compound, and stirring for 1 hour, a pale yellow polyamino acid solution was obtained. The viscosity was 45C.P., the solid content is 6%, and its pretilt angle is 1..66 degrees. Comparative Example 1 In a 1-liter four-neck reaction flask, a condenser tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen gas was passed through to add 8.924 g of 2,2, -di- (4- (4-aminobenzene). Oxy) benzene) propane (2, 2'-bis (4- (4--ami η ophe η oxy) phen y1) propane) and 70 g of n-methylpyrrolidone solvent, stirred for about 10 minutes, and added 2.205 g of biphenyl Tetracarboxylic dianhydride, repeat this step twice, add 15 g of n-methylpyrrolidone after the last addition, stir for 3 hours, precipitate with a large amount of toluene, and obtain a solid, which is confirmed as polyamine by IR spectrum The structure of the repeating unit of the acid is as follows:

〇〇 After adding 46.25 g of ethylene glycol butyl ether and 13 8.75 g of n-methylpyrrolidone, (). 1 g of 3-aminopropyltrimethoxysilane, and stirred for 1 hour to obtain a light yellow polyamine solution, viscosity It is 80C.P ·, the solid content is 7.5%, and its pre-tilt angle is 3.56. 14 This paper size is in accordance with China National Sample (CNS) A4 specification (210X297 mm) 83. 3.10,000 (please read the back first) Please note this page before filling in this page) i, .HI ----= In 、 · ιτ 丨 line- ·· Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives, 580513 A7 B7 5. Description of the invention (13). Comparative Example 2 In a 1-liter four-neck reaction flask, a condensing tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen was passed through. 7.247 g of 4,4'-aniline (4,4'_oxydianiline) and 70g were added. N-methylpyrrolidone solvent, stir for about 10 minutes, add 2.559g of pyromellitic dianhydride, repeat this step twice, add 15g of n-methylpyrrolidone after the last addition, and stir for 3 hours, A large amount of toluene was used to precipitate to obtain a solid, which was confirmed to be polyamic acid by IR spectrum. The structure of the repeating unit is as follows:

After adding 46.25g of ethylene glycol butyl ether and 138.75g of n-methylpyrrolidone, O.lg of 3-aminopropyltrimethoxysilane, and stirring for 1 hour, a pale yellow polyamidine solution was obtained, with a viscosity of 90C.P. , The solid content is 7.5%, and its pretilt angle is 4.14 degrees. Comparative Example 3> In a 1-liter four-neck reaction flask, a condenser tube, a thermometer, a feeding tube and a stirring rod were respectively inserted, and nitrogen gas was passed through. 6.170 g of 3,3'-dihydroxy-4,4'- Diaminobiphenyl (3,3'-diliydroxy-4,4'-diamino-biphenyl) and 70 g of n-methylpyrrolidone solvent, stir for about 10 minutes, add 2.942 g of benzophenone tetracarboxylic dianhydride, Repeat this step twice, add 15g of n-methylpyrrolidone after the last addition, stir for 6 hours, and precipitate with a large amount of toluene to obtain a solid, which is confirmed to be polyamic acid by 1R spectrum, and its unit structure is repeated. As shown below: This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 cm) 83. 3.10,000 (Please read the precautions on the back before filling this page), 玎 ------ Must 580513 A7 B7 V. Description of the invention (14)

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H01 〇 After adding 46.25g of ethylene glycol butyl ether and 138.75g of n-methylpyrrolidone, 0.1 g of 3-aminopropyltrimethoxysilane, and stirred for 1 hour, a pale yellow polyamidic acid solution was obtained, with a viscosity of 80C. P., the solid content is 7.5%, and its pretilt angle is 3.96 degrees. In summary, the good alignment film material of the present invention has a low pre-angle characteristic, and can be applied to high-order twisted nematic liquid crystal displays, and it is manufactured by polymerization, has good mass productivity, and has a practical industrial price. Conditions for invention patents. It should be understood that any modification or change made without departing from the spirit of the present invention is intended to be protected by the present invention. (Please read the precautions on the back before writing this page) 订 Order--printed by Line Shoulder Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives 16 This paper size applies to China National Standard (CNS) A4 (210X297) %) 83.3.10,000

Claims (2)

3 05 8 5 8 8 8 8 ABCD VI. Polyamic acid alignment film material with an application angle of less than 2 degrees. Its polyamic acid structure can be represented by the repeating unit of the following general formula: Wherein R is selected from the following tetracarboxylic acid groups, and the ratio of X to y is 0.8 to 1.2 ⑻ 0 0 (b) 〇 〇 (i) —cr〇yc—; HOI'N〆,-〇HOO (Please read the notes on the back before filling out this page) Printed by the Employees' Cooperative of the Central Bureau of Standards, Ministry of Economic Affairs 〇J ~ YT〇 Factory c— HO-^^ CF ^^^-〇H (k) 9 i? (1) ff —c_r〇rcoCH2CH2〇-r ^ r-c— .H〇-r ^ ^ r〇H, H〇-r -c- Ί- 丨 〇O -OH (m) ◊ H01 c—, r〇HO! 7 This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) 580513 A8 B8., C8 D8 Scope 2. The alignment film material according to item 1 of the scope of patent application, in which the polyamino acid is obtained by condensation polymerization of dianhydride and phenylbisamine, and the phenylbisamine is 4,4'-bis ( 4-Aminophenoxy) biphenyl and dianhydride are selected from the following: ⑻ (C) IIΊ / 0 government, ⑷ 〇 〇 (Please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Central Bureau of Standards, Ministry of Economic Affairs &lt; ^ e〇CH2CH2〇T〇r: ^ 〇; 〇 ο (m) 〇 18 This paper size applies Chinese National Standard (CNS) A4 specification (21 OX297 mm) ABCD 580513 6. Scope of patent application 3. The alignment film material in the scope of IP application for item 1 in which the polymerization degree of the polyamic acid is ίο ~ 5,000. 4. For example, the alignment film material in the scope of patent application, the polymerization degree of polyamic acid is 40 ~ 250. 5. The alignment film material according to item 1 of the scope of patent application, wherein the weight average molecular weight of the polyoxylanine is 2,000 to 2,000.000. 6_ The alignment film material according to the scope of the patent application, wherein the weight average molecular weight of the polyamic acid is 8,000 to 50.000. (Please read the notes on the back before filling in this education) * ^ ϋρ mm— ....... V J.-II · i--ϋ ^ —-· &quot; Employee Consumer Cooperatives, Central Bureau of Standards, Ministry of Economic Affairs For printing | Suitable for a 5-foot-size sheet of paper, a standard I standard, a home standard, and a centimeter