TW200526730A - Cellulose acetate film, optical compensatory sheet, polarizing plate and liquid crystal display - Google Patents

Abstract

The present invention relates to a cellulouse acetate film with low retardation in the thickness direction. When the retardation in the thickness direction is ranging from -12 nm to 25 nm, the film density under 25 DEG C is adjusted to 1.280 below.

Description

200526730 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a cellulose acetate film having optical anisotropy, an optical compensation sheet using the same, a polarizing plate, and a liquid crystal display device. [Prior art] Cellulose acetate films are used in silver halide photographic materials, retardation plates (optical compensation plates), polarizing plates or liquid crystal display devices. The cellulose acetate film is produced by a general solvent casting method or a melt casting method. The solvent casting method is a method in which a solution (glue) in which cellulose acetate is dissolved in a solvent is cast onto a support, and the solvent is evaporated to form a thin film. Melt Casting method is to cast (melt) a molten material by heating cellulose acetate on a support, and to cool the support to form a thin film. The method of the solvent casting method can produce a film having higher planarity and a better film than the melt casting method. For this reason, the conventional system uses a solvent casting method which is better than the melt casting method. The cellulose acetate solvent used in the solvent casting method is generally an organic solvent ', mainly using a chlorinated hydrocarbon such as dichloromethane. There have also been researched methods using other organic solvents instead of chlorinated hydrocarbons. Organic solvents of cellulose acetate are known as acetone (boiling point: 56t :), methyl acetate (boiling point: 56χ :), tetrahydrofuran (boiling point: 65 ° C), 1,3-dioxolane (boiling point: 75) ^), 14-dioxane (boiling point: 101 ° C). However, cellulose acetate having a high degree of substitution (for example, a degree of substitution of 2.87 or more) is difficult to dissolve in an organic solvent other than a chlorinated hydrocarbon by a conventional dissolution method, and a solution having a practically sufficient concentration cannot be obtained. In addition, when dissolved in chlorinated hydrocarbons, there are problems of long dissolution time and productivity. To replace the conventional dissolving method, a method of dissolving cellulose acetate at a low temperature, that is, a cooling dissolving method has been proposed (see, for example, Non-Patent Document 1). According to 200526730, according to the report, cellulose acetate (degree of vinegarization: 60.1% ~ 61.3%) is cooled in acetone to -80 ° C ~ -70 ° C, and can be heated by heating. A dilute solution of 0.5 to 5% by mass was obtained. The use of the obtained solution has been proposed for spinning technology (for example, refer to Non-Patent Document 1). It has also been proposed to use a solution obtained by a cooling dissolution method to produce a cellulose acetate film (for example, refer to Patent Documents 1 to 3). Furthermore, a method for dissolving cellulose acetate quickly and completely has been proposed as a method for dissolving glue, which is characterized in that when the purpose is a step of coarse dissolution, the method has a step of promoting dissolution while sending liquid (for example, refer to patent documents). 4). [Non-Patent Document 1] Makromol.chem. Vol. 143, Page 105, 1971 [Non-Patent Document 2] Journal of the Textile Machinery Society, Volume 34, Pages 57-61, 1981 [Patent Document 1] Japanese Patent Application Laid-Open No. 9-9 5 5 3 8 [Patent Literature 2] Japanese Patent Application Laid-Open No. 9-95 544 [Patent Literature 3] Japanese Patent Application Laid-Open No. 9-9 5 5 5 7 g [Patent Literature 4] Publication No. 2003-221449 [Summary of the Invention] [Problems to be Solved by the Invention] When a cellulose acetate film is used in an optical application such as a retardation plate (optical compensation sheet), a polarizing plate, or a liquid crystal display device, its optical anisotropy The system is very important. In general, cellulose acetate films are easy to control in-plane retardation (Re), but it is difficult to control retardation (Rth) in the thickness direction, especially to reduce Rth. The hysteresis of the direction of acetic acid and liquid crystal of 200526730, and the hysteresis of the film density of the following (17), among which 40 to ′ are substituted. Among them, the purpose of the present invention is to provide a cellulose film with a low hysteresis in the thickness direction. It is also an object of the present invention to provide an optical compensation sheet and a polarizing plate display device using a cellulose acetate film having an appropriate cutting thickness of hysteresis. [Means for solving the problem] The present invention provides an optical compensation sheet of the cellulose acetate film (14) of the following (1) to (13), a polarizing plate of the following (15), and the following (16) and a liquid crystal display device . (U-type cellulose acetate film, characterized in that the thickness at 25 ° C is 1.280 or less, and the hysteresis in the thickness direction is 2 to 25 nm. (2) The cellulose acetate film according to (1), wherein the thickness direction値 is 0 to 25 nm. (3) The cellulose acetate film according to (2), wherein the thickness direction 値 is 0 to 15 nm. (4) The cellulose acetate film according to any one of (1) to (3) The absolute value of the in-plane hysteresis is 0 to 1 Onm. (5) The cellulose acetate film thickness as described in any one of (1) to (4) is 10 to 5000 μm. (6) As described in (5) Cellulose acetate film, wherein the film thickness is 2 〇 0 μιη 〇 (7) The cellulose acetate film as described in any one of (1) to (6), the cellulose acetate film is in the range of 2.87 to 3.00, (8) The cellulose acetate film according to any one of (1) to (7), in which 200526730 further contains a retardation reducing agent satisfying the condition of the following formula (I), and the retardation reducing agent has The amount of the following formula (Π): (I) (Rth (A) -Rth (0) / A ^ -1.0 (II) 0.01 S AS 30 [where Rth (A) is 100 parts by mass of acetate fiber Vegetarian Hysteresis 値 in the thickness direction of the cellulose acetate film in mass parts of the retardation reducing agent; Rth (0) is a hysteresis 厚度 in the thickness direction of the acid cellulose film produced in the same manner except that the retardation reducing agent is not added; Addition amount (mass part) of retardation reducing agent per 100 parts by mass of cellulose acetate. (9) The cellulose acetate film according to any one of (1) to (8), which is a chlorine-based solvent (10) The cellulose acetate film according to (9), wherein the mixture of a chlorine-based solvent and cellulose acetate is used by a cooling step of -100 to -10 ° C. (11) The cellulose acetate film as described in (10), wherein the mixture of the chlorine-based solvent and the cellulose acetate is used before the cooling step of -100 to 10 ° C. A cellulose acetate solution prepared by performing a swelling step with a mixture of a solvent and cellulose acetate at -1 0 to 5 5 ° C. (12) The cellulose acetate film according to (10), wherein the chlorine solvent and Z acid cellulose mixture is used at -100 ~ -10 ° C cooling step Afterwards, the cellulose acetate solution prepared by heating the mixture of a chlorine-based solvent and cellulose acetate at 0 to 5 7 ° C. (13) The cellulose acetate film according to (9), wherein the chlorine A mixture of a solvent and & acid cellulose is a 200526730 (I4) optical compensation sheet prepared by a heating step at 30 to 200 ° C, which has at least one (1) to .. (1 3) The cellulose acetate film according to any one of the above. (1 5) A polarizing plate comprising at least one cellulose acetate film according to any one of (1) to (1 3). (16) A liquid crystal display device including at least one cellulose acetate film according to any one of (1) to (1 3). (17) The liquid crystal display device according to (16), which is a Va mode or an IPS mode. Density of cellulose acetate film at 25 ° C, the temperature of the film is 25 φ ° C and relative humidity of 50% after 24 hours temperature and humidity adjustment, and the density of n-heptane / carbon tetrachloride It is measured in a tube. In this specification, hysteresis concrete is a concrete material in which a sample of 30 mm x 40 mm is humidity-conditioned at 25 ° C and 60% RH for 2 hours. The Re (λ) of the in-plane hysteresis was measured using a polarizing analyzer (M-150: manufactured by JASCO Corporation) using He-Ne laser. Further, the hysteresis 値 Rth (λ) in the thickness direction is based on the above-mentioned Re (λ), and the in-plane retardation axis is an inclined axis, and the film normal direction is from +40. The hysteresis chirp measured by incident light at a wavelength of λ nm in the oblique direction, and the in-plane retardation axis is the oblique 0 axis, with respect to the film normal direction, from -40. The hysteresis 测定 measured by incident light having a wavelength of λ nm in the oblique direction was calculated based on the hysteresis 测定 measured in three directions in total, and the average refractive index of cellulose acetate was assumed to be 値 1 · 4 8 and the film thickness. [Effects of the Invention] As a result of studies conducted by the present inventors, it is apparent that the density of cellulose acetate films (for example, the cellulose acetate film described in JP-A-2000-11411) is known. It is 1 · 2 80 ~ 1.290. According to the results of further investigations by the inventors, the hysteresis in the thickness direction 200526730 low (0 to 30 nm) cellulose acetate film 'can also clearly know that its starting degree is lower than the conventional technology (1.2 80 or less) ° The cellulose acetate film with low hysteresis in the thickness direction can be produced rationally by adjusting the density. The use of the cellulose acetate film having a low thickness retardation in the thickness direction of the present invention does not cause a problem, and the retardation retardation of a retardation plate and a polarizing plate can be arbitrarily controlled. Therefore, by using such a retardation plate or a polarizing plate, a highly reliable liquid crystal display device can be obtained. [Best Mode for Carrying Out the Invention] The density of the cellulose acetate film at 25 ° C is 1.280 or less. The density is more preferably 1.200 ~ 1.280, and most preferably 1.250 ~ 1.280. The hysteresis in the thickness direction of the cellulose acetate film is -12 to 25 nm. The hysteresis in the thickness direction is preferably -5 to 25 nm, more preferably 0 to 25 nm, and most preferably 0 to 15 nm. Cellulose acetate is an ester of cellulose and acetic acid. Cellulose acetate refers to all or part of the hydrogen atoms of the hydroxyl groups present at the 2-, 3-, and 6-positions of the glucose unit of cellulose, and is replaced by an acetamyl group. The degree of substitution of cellulose acetate is preferably 2.87 or more, more preferably 2.87 to 2.97, more preferably 2.88 to 2.96, and most preferably 2.90 to 2.95. The basic principles of the synthetic method of cellulose acetate are described in Shinoda Uda, Wood Chemistry, pp. 180-190 (Kyoritsu Publishing, 1968). A typical synthetic method of cellulose acetate is a liquid-phase vinegarization method using an acetic anhydride-acetic acid-sulfuric acid catalyst. Specifically, a cellulose raw material such as cotton wool fiber or wood paper hair is pretreated with an appropriate amount of acetic acid, and then the pre-cooled acetic acid mixture is esterified to synthesize complete cellulose acetate (2-position, 3-position). The total degree of tritium substitution at 6 and 6 is about 3.0. The above-mentioned acetic acid 200526730 and its anhydride are in acid. The storage of ethyl acetate and the use of acetone to reduce the amount of sterilized ester fibers should be considered as the theory of inverse acidity. The chemical properties of acetone and acetone are based on the use of acetic anhydride as the soluble acid. In order to make the residual acetic anhydride in the system hydrolyzed and partially neutralize the acetic acid catalyst, after the internal acetylation reaction is completed, the mixed water-containing solvent of the acid-sulfur-containing media is contacted with water. Add an aqueous solution of a neutralizing agent (such as calcium, magnesium, iron, aluminum, or zinc carbonate, acetate, or oxide). Next, in the presence of a small amount of acetic acid reaction catalyst (generally, residual sulfuric acid), the obtained complete cellulose acetate is saponified and matured at 50 to 9 (TC maintained) to change to have a desired degree of tritiated substitution and The degree of polymerization of cellulose acetate. The desired cellulose acetate was obtained at the time point. The remaining catalyst in the system was completely neutralized with a neutralizing agent as described above, or the acetate fiber was put into unneutralized water or dilute sulfuric acid. Cellulose solution (or put water or dilute sulfuric acid into cellulose acetate solution) to separate cellulose acetate, and then wash and stabilize to obtain cellulose acetate. The polymerization degree of savirin acetate is an average degree of polymerization with a viscosity of 20 0 to 7 0, preferably 250 to 550, more preferably 250 to 400, and most preferably 250 to 350. The average viscosity of the viscosity is based on the limiting viscosity method of Uda et al. (Uda Kazuo, Hideo Saito, fiber Academic Society Journal, Vol. 18 No. 1, No. 105 ~ 120, page 1962). The method for measuring the viscosity average polymerization degree is also described in Japanese Patent Application Laid-Open No. 9 _ 9 5 5 3 8. It is preferable in the present invention. The molecular weight distribution of cellulose acetate used was evaluated by gel permeation chromatography, and its polydispersity index Mw / Mn (Mw is the mass average molecular weight, Mη is the number average molecular weight) is small, and the molecular weight distribution is preferably narrow. Specific The M w / Mn ratio is preferably 1.0 to 3.0, more preferably 1.0 to 2.0, and most preferably 1.0 to 1.6. -11- 200526730 The average molecular weight of cellulose acetate with few low molecular components (polymerization Degree) High, viscosity is lower than ordinary cellulose acetate. Cellulose acetate with low low molecular components can be obtained by removing low molecular components from cellulose acetate synthesized by general methods. The removal of low molecular components is by The cellulose acetate is washed and washed with a suitable organic solvent. It is also possible to synthesize cellulose acetate with low low-molecular components. When producing cellulose acetate with low low-molecular components, the amount of sulfuric acid catalyst in the acetation reaction is relative to the fiber. It is better to adjust the mass of 100 to 0.5 to 25 parts by mass. When the amount of the sulfuric acid catalyst is in the above range, cellulose acetate having a preferable molecular weight distribution point (molecular weight distribution uniform sentence) can be synthesized. About B Cellulose raw materials or synthetic methods are also described in Japanese Technical Publication No. 200 1-1 745 (issued on March 15, 2001, Japan Association of Inventions), pages 7 to 12. Cellulose acetate film is a kind of film-forming polymerization. It is preferable that the material component is substantially composed of cellulose acetate. "Substantially" means 55% by mass or more of the polymer component (preferably 70% by mass or more, more preferably 80% by mass or more, and more preferably 90% by mass) % Or more). Two or more types of cellulose acetate can be used in the cellulose acetate film. The two or more types of cellulose acetate can have different degrees of substitution, polymerization degree, or molecular weight distribution. The cellulose acetate film is made by using cellulose acetate. The solution is preferably produced by a solvent casting method. The raw material of the cellulose acetate solution is preferably cellulose acetate particles. It is preferable that 90% by mass or more of the used particles have a particle diameter of 0.5 to 5 mm. In addition, it is preferable that 50% by mass or more of the particles have a particle diameter of 1 to 4 mm. It is preferable that the cellulose acetate particles contain a shape that is as nearly spherical as possible. -12- 200526730 The cellulose acetate used in the preparation of the cellulose acetate solution is preferably a water content of 2% by mass or less, more preferably 1% by mass or less, and most preferably 0.7% by mass or less. Cellulose acetate generally contains a water content of 2.5 to 5% by mass. Therefore, it is preferably used by drying cellulose acetate. [Additives of cellulose acetate film] Various types of additives (such as plasticizers, modifiers, anti-ultraviolet agents, optical Anisotropy control agent, fine particles, release agent, infrared absorber). The plasticizer is described in Japanese Patent Application Laid-Open Nos. 2000-1-151910. The infrared absorbing agent is described in Japanese Patent Application Laid-Open Nos. 2000-1 1 9 4 5 2 2. The timing of adding additives depends on the type of additive. Addition of additives can be carried out at the end of the dope preparation. The cellulose acetate film can also be produced by a melt casting method instead of a solvent casting method using a cellulose acetate solution. In the case of the melt casting method, various additives (for example, a compound that reduces optical anisotropy, a wavelength dispersion adjusting agent, an anti-ultraviolet agent, a plasticizer, a deterioration preventing agent, fine particles, and an optical property adjusting agent) may be added to the acetate fiber. Added when the vegetable is hot-melted. [Hysteresis Reducing Agent] In order to make the retardation lag (Rth) in the thickness direction of the film approximately zero, in addition to reducing the density of the cellulose acetate film, the compound itself can use a compound with a low polarization and directionality to sufficiently reduce the optical direction Sex is better. When such a compound is used, the in-plane retardation Re (Re) of the cellulose acetate film can also be reduced. A compound that reduces optical anisotropy, that is, a retardation reducing agent, is sufficiently compatible with cellulose acetate, and the compound itself does not have a rod-like structure or a planar structure. For example, when the compound system has a plurality of planar functional groups such as aromatic 200526730 group, it is expected that these functional groups are not in the same plane but have a non-planar structure. The cellulose acetate film system further contains a retardation reducing agent that satisfies the conditions of the following formula (I), and it is preferable that the amount satisfies the following formula (II). (I) (Rth (A) -Rth (0) / A ^ -1.0 (II) 0.01 S AS 30 In the formula, Rth (A) is a compound containing 8 parts by mass of hysteresis reducing agent per 100 parts by mass of cellulose acetate. Hysteresis in the thickness direction of cellulose acetate film. Rth (0) is a hysteresis in the thickness direction of the cellulose acetate film produced in the same manner except that a retardation reducing agent is not added. A is per 100 parts by mass of cellulose acetate. The amount (parts by mass) of the retardation reducing agent. The retardation reducing agent and the amount of the retardation reducing agent preferably satisfy the following formulae (la) and (II a), and more preferably satisfy the following formulae (lb) and (lib). (Ia) ( Rth (A) -Rth (0) / A ^ -2.0 (IIa) 0.05 ^ A ^ 25

(Ib) (Rth (A) -Rth (0) / A ^ -3.0 (Ilb) 0.1 ^ A ^ 20 The retardation reducing agent is preferably a compound represented by the following general formula (1 3). ] General formula (1 3 >

[Wherein R1 is an alkyl group or an aryl group, R2 and R3 are each independently a hydrogen atom, an alkyl group or an aryl group, the total number of carbon atoms of R1, R2 and R3 is 10 or more, and the alkyl group and the aryl group are May each have a substituent] -1 4-200526730 The alkyl and aryl substituents are preferably a fluorine atom, an alkyl group, an aryl group, an alkoxy group, a sulfo group and a sulfonamido group, and the alkyl group and the aryl group are preferred. , Alkoxy, sulfo and sulfonamido are more preferred. The alkyl group may have a branched structure or a cyclic structure. The number of carbon atoms of the alkyl group is preferably 1 to 25, more preferably 6 to 25, and most preferably 6 to 20. Examples of alkyl include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, third butyl, pentyl, isopentyl, third pentyl, hexyl, cyclohexyl, heptyl , Octyl, bicyclooctyl, nonyl, adamantyl, decyl, third octyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, ten Hexyl, heptadecyl, octadecyl, undecyl, eicosyl. The number of carbon atoms of the aryl group is preferably 6 to 30, and more preferably 6 to 24. Examples of aryl include phenyl, biphenyl, terphenyl, naphthyl, bipernaphthyl, and triphenylphenyl. The following are examples of compounds represented by the general formula (1 3). 200526730

200526730

A one 3 8 A- 3 9 1 200526730

A-4 9

The compounds represented by the following general formulae (4) to (12) can also be used as a hysteresis reducing agent.

-18- 200526730 [Chemical formula 5 γ31—L31-γ32 General formula ⑷ V31 γ33_ | ^ 2-J_L3 (General formula (5) γ34 γ39 [38 γ3 ^ _L35-0—General formula (6) I * 36 Υ37 y44 46 V32 ν33 * γ40_ [39_ Zhanyi L43_A_jj4D j ^ 41 > | r41 > | r42 General formula (7) [43 y34 Y45—L44-C—L48—C—L ^ Y48 '45 r46 γί7 General formula (8> v35 V36 V37 -L40q _l5 ^ _q _l55__l53—y53

^ 62 ^ 61 > Jr52 General formula γ65 v38 L71 V39 ——Lee. Bu [68 i 69 > {^ 1 ^ 62 ^ 63 General formula ⑴> V40 I ν41 V42 Y65_L72 ^ (!; _ L7B. -C- L79- L73 L74 l 75 | ββ γ67 ^ 6B General formula (12) 76/70 200526730 In general formulas (4) to (12), Y31 to Y7G are each independently fluorene oxygen having 1 to 20 carbon atoms. Group, an alkoxycarbonyl group having 2 to 20 carbon atoms, amidino group having 1 to 20 carbon atoms, and a carbamoyl group or hydroxyl group having 1 to 20 carbon atoms. V31 to V43 are each independent. Geohydrogen or aliphatic group having 1 to 20 carbon atoms. L31 to L8 () are each a single bond, or a divalent saturation having 1 to 40 total atoms and 0 to 20 carbon atoms. Linking groups. V31 to V43 and L31 to L8 () may further contain substituents. The number of carbon atoms of fluorenyloxy is preferably 1 to 16 and more preferably 2 to 12. Examples of fluorenyloxy include ethyl Ethoxy, propionyloxy, butyryloxy, pentamyloxy, isoamyloxy, 2,2-dimethylpropanyloxy, 2-methylbutyryloxy, hexamethyleneoxy , 2,2-Dimethylbutyryloxy, heptyloxy, cyclohexylcarbonyloxy, 2-ethylhexamidine Octyloxy, decyloxy, dodecyloxy, phenylethoxy, 1-naphthyloxy, 2-naphthyloxy, 1-adamantylcarbonyloxy. The number of carbon atoms of the oxycarbonyl group is preferably from 2 to 16 and more preferably from 2 to 12. Examples of the alkoxycarbonyl group include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, and isopropoxy group. Carbonyl, butoxycarbonyl, third butoxycarbonyl, isobutoxycarbonyl, second butoxycarbonyl, pentoxycarbonyl, third pentoxycarbonyl, hexyloxycarbonyl, cyclohexyloxycarbonyl , 2-ethylhexyloxycarbonyl, etc., ethylethylpropoxycarbonyl, octyloxycarbonyl, 3,7-dimethyl-3-octyloxycarbonyl, 3,5,5-trimethylhexyloxycarbonyl , 4-tert-butylcyclohexyloxycarbonyl, 2,4-dimethylpentyl-3-oxycarbonyl, 1-adamantyloxycarbonyl, 2-adamantyloxycarbonyl, dicyclopentadiene Oxycarbonyl, decyloxycarbonyl, dodecyloxycarbonyl, tetradecyloxycarbonyl, hexadecyloxycarbonyl. The number of carbon atoms of amidino is preferably 1 to 16, and 1 to 1 2 -20- 200526730 Examples of amido groups include B Ammonium, propylamidine, butylamidine, isobutylamylamine, 2,2-dimethylpropylammonium, 3-methylbutylammonium, 3-methylbutanylamine, 2,2- Dimethyl butanidine, heptylamine, cyclohexylcarboxy 2-ethylhexaneamide, 2-ethylbutanidine, octylamine, nonamidine, alkylcarboxamide, 2-adamantylcarboxamide Amine, Decamidine, Tridecylamine, Amine, Heptadecylamine. The carbon number of the carbamoyl group is preferably from 1 to 16, and more preferably from 1 to 1. Examples of carbamoyl groups include methylamine carbamoyl, dimethyl, ethylamine carbamoyl, diethylamine carbamoyl, propylamine carbamoyl, propylamine carbamoyl, and butylamine. Formamidine, third butylaminoformamylaminoformamyl, second butylaminoformamyl, pentylamineformamyl, amidoformamyl, hexylamineformamyl, cyclohexylamine Fluorenyl, 2-methylaminomethylamidino, 2-ethylbutylaminomethylamidino, tertiary octylamine methylheptylamine methylamidino, octylamine methylamidino, i_adamantylamine methylamidamine Nominylamine formamyl, decylamine formamyl, dodecylamine formamidine, tetradecylamine formamyl, hexadecylamine formamyl. Examples of the substituents of Y31 to Y7 () include a halogen atom (fluorine atom, molybdenum atom, or iodine atom), a straight lock, a branch, a cyclic alkane, a cyclic alkyl group, an active methine group, an alkenyl group, Alkynyl, aryl, heterocyclyl, oxonyl, aryloxycarbonyl, heterocyclyloxycarbonyl, carbamoylaminomethylamino, n-sulfamomethylaminomethyl, n-aminomethylamino Carbaminyl, carbazolyl, carboxyl, or its salt, ethylenediaminoglyoxylate, cyano, and carboimide (Including repeated ethoxy or propoxy groups), square oxo, heterofluorenyloxy, fluorenyloxy, alkoxycarbonyloxy, fluorenamine, fluorenamine, fluorenamine, 1-adamantyl醯 .2 is more aminomethyl amidino, iso, isobutyl tertiary pentyl ethyl hexanoyl, phenyl, 2-fluorenyl, chloro, S (including radical, fluorenyl, fluorenyl, fluorenyl, i) Aryloxy group of methyl units 200526730 carbonyloxy group, carbamoyloxy group, sulfonyloxy group, amine group, alkylamino group, arylamino group, heterocyclic amine group, fluorenylamino group, sulfonamido group , Urea, thiourea, hydrazone Imine, alkoxycarbonylamino, aryloxycarbonylamino, sulfamoylamino, ureaamino, ammonium, aminoethylenediamidoamine, n-alkylsulfonylurea, n-aryl Sulfonylurea, n-fluorenylureido, n-fluorenylamine sulfonamido, heterocyclic group containing a quaternary nitrogen atom (for example, pyridinyl, imidazolyl, quinolinyl, isopropyl (Quinolinyl), isocyano, imino, sulfosulfenyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, sulfo or its salt, aminesulfinyl 'N-fluorenylaminosulfonyl, n-sulfanilinosulfanyl, or a salt thereof, phosphine, phosphinyl, phosphinyloxy, phosphinylamino, sulfonyl, phosphate. Y31 ~ Y7 () It may be a substituent formed by compounding the above-mentioned substituents. Examples of the compound substituent include ethoxyethoxyethyl, ethoxyethoxyethyl, and ethoxycarbonylethyl. V31 ~ V43 The number of carbon atoms of the group group is preferably from 1 to 16, and more preferably from 1 to 12. The aliphatic group is preferably an aliphatic hydrocarbon group, and a lock-shaped, branched and cyclic alkyl, alkenyl or alkyne A radical is more preferred. Examples of alkyl radicals include methyl Base, ethyl, propyl, isopropyl, butyl, isobutyl, second butyl, third butyl, pentyl, third pentyl, hexyl, octyl, decyl, dodecyl, Eicosyl, 2-ethylhexyl, cyclopentyl, cyclohexyl, cycloheptyl, 2,6-dimethylcyclohexyl, 4-tert-butylcyclohexyl, cyclopentyl, 1-adamantyl , 2-adamantyl, bicyclic [2.2.2] oct-3-yl. Examples of alkenyl include ethylene, allyl, isoamyl, geranyl, oleyl, 2_ Cyclopenten-1-yl and 2-cyclohexenyl. Examples of alkynyl include ethynyl and propargyl. Examples of substituents are the same as those of -22-200526730. L31 ~ Examples of the linking group of L8O include an alkylene group (for example, methylene, ethylidene, propylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, methylethylene Group, ethylidene group), divalent cyclic group (eg, cis-1,4-cyclohexylene, trans-1, cyclohexylene, cyclopentylene), ether, thioether , Esters, amidines, amidines, sulfenimides, thioethers, sulfonamides, ureites, thiosulfaminesTwo or more linking groups can be bonded to form a valence compound linking group. Examples of composite substituents include-(CH2) 2_0_ (CH2h

-(CH2) 2-0- (CH2) 2-0- (CH2).,-(CH2) 2-S- (CH2) 2-,-(CH2) 2-0-C0- (CH2) 2- ° A substituent may be further contained, and examples of the substituent include, for example, a group substituted for the aforementioned R11'13. Examples of the compounds represented by the formulae (4) to (I2) include citric acid (for example, 0-ethylammonium citrate, 0-ethylammonium citrate tributylammonium b— * Nichime, lemon Triethyl ethanoate, tributyl butyl citrate, 0-ethyl triethyl> tris (ethoxycarbonylmethylene) acid ester), oleates (e.g., ethyl oleate, oil

Butyl ester, 2-ethylhexyl oleate, phenyl oleate, cyclohexyl oleate, octyl salicylate, ramie oleate (eg, methyl ethyl fluorenate linoleate), decyl ~ β y ~ Esters (e.g., dibutyl sebacate), glycerol carbonates (e.g., glyceryl triacetate, glyceryl tritributyrate), glycolates (e.g., butyl o-phenylene ~ formylbutyl) Glycolate, ethylphthalate ethyl glycolate, methyl phthalate ethyl glycolate, butyl phthalate ethyl glycolate, methyl o-phthalate Xylylene methyl glycolate, propyl o-phenyl ethyl propyl glycolate, butyl ophthalyl butyl glycolate, -23- 200526730 o-dimethyl dimethyl octyl Glycolate), carbonates of isopentaerythritol (e.g., isopentaerythritol tetraacetate, isopentaerythritol tetrabutyrate), carbonates of diisopentaerythritol (e.g., diisopentaerythritol) Hexaacetate, diisopentaerythritol hexabutyrate, diisopentaerythritol tetraacetate), carbonates of trimethylolpropane (for example, trimethylolpropane triacetate, trimethylol base Alkane diacetate monopropionate, trimethylolpropane tripropionate, trimethylolpropane tributyrate, trimethylolpropane tripentanoate, trimethylolpropane tri (acetic acid Tributyl ester), trimethylolpropane di 2-ethylhexanoate, trimethylolpropane tetra 2-ethylhexanoate, trimethylolpropane diacetate monocaprylate, trimethylol Propane tricaprylate, trimethylolpropane tri (cyclohexane carboxylate)), pyrrolidone carbonates (2-pyrrolidone-5-methyl carbonate, 2-pyrrolidone-5 -Ethyl carbonate, 2-pyrrolidone-5-butyl carbonate, 2-pyrrolidone-5-2-ethylhexyl carbonate, cyclohexane dicarbonate (eg, cis-1,2-cyclo Dibutyl hexane dicarbonate, trans-1,2-cyclohexane dicarbonate, cis-i, 4-cyclohexane dibutyl carbonate, trans-1,4-cyclohexane Dibutyl dicarbonate), xylitol carbonate (eg, xylitol pentaacetate, xylitol tetraacetate, xylitol pentapropionate). The glycerol ester is described in Japanese Patent Application Laid-Open No. 1 1-2 4 67 0 4. Diglycerol ester is described in JP-A-2000-63 5 60. Citrate is described in Japanese Patent Application Laid-Open No. 1 1-92 5 74. The compound represented by the following general formula (16) can also be used as a hysteresis reducing agent. -24-200526730 [Chemical formula 6] General formula (1 6 >

d I 3 Q1—X—Q3 In the general formula (16), Q1, Q2, and q3 are bases each independently containing a 5-membered ring or a 6-membered ring. The ring system includes a hydrocarbon ring and a heterocyclic ring. The ring may form a condensed ring with other rings. The hydrocarbon ring system is preferably a substituted or unsubstituted cyclohexane ring, a substituted or unsubstituted ru cyclopentane ring or an aromatic hydrocarbon ring, and more preferably an aromatic hydrocarbon ring. The aromatic hydrocarbon ring is preferably a monocyclic or bicyclic ring having 6 to 30 carbon atoms (e.g., a 'benzene ring, a naphthalene ring). The number of carbon atoms is preferably 6 to 20, and more preferably 6 to 12. The benzene ring is the best. The heterocyclic system is preferably a hetero atom containing an oxygen atom, a nitrogen atom or a sulfur atom. The heterocyclic ring is preferably one containing aromaticity. Examples of heterocycles include furan, pyriole, thiophene, imidazole, pyrazole, pyridine, pyridine, datra, triazole, triple well, indole, indazole, purine, thiazole 0, thiazole, thiadiazole, Oxazole, sulfonazole, oxadiazole, quinone, isoquinol, quinone, naphthol, quinoxaline, quinazoline, oxazoline, pteridine, acridine, phenanthroline, phenone, tetrazole , Benzimidazole, benzoxazole, benzothiazole, benzotriazole, and syringa. Pyridine, three-tillage and quintillage are preferred. Q1, Q2, and Q3 may have a substituent. Examples of substituents include alkyl, alkenyl, alkynyl, aryl, amine, substituted amino, alkoxy, aryloxy, fluorenyl, alkoxycarbonyl, aryloxyfluorenyl, and fluorenyl Sulfonylamino, alkoxycarbonylamino, aryloxycarbonylamine-25- 200526730, sulfonylamino, sulfamoyl, substituted sulfamoyl, carbamoyl, substituted carbamoyl, Alkylthio, arylthio, sulfofluorenyl, sulfenamido, ureido, phosphonium amino, hydroxyl, hydrogenthio, halogen (fluorine, chlorine, bromine, iodine), cyano, Sulfonyl, carboxyl, nitro, hydroxamic acid, phosphino, hydrazine, imino, heterocyclyl, silyl. These substituents may further contain a substituent. The plural substituents may be different from each other. Also, plural substitutions s may be bonded to each other to form a ring. The number of carbon atoms of the alkyl group is preferably from 1 to 20, more preferably from 1 to 12, and I "is most preferred. Examples of the alkyl group include methyl, ethyl, isopropyl, thienyl, octyl, and decyl Group, hexadecyl group, cyclopropyl group, cyclopentyl group, cyclohexyl group. The number of carbon atoms of an alkenyl group is preferably from 2 to 20, more preferably from 2 to 12, and the most preferred. Examples of alkenyl groups include ethylene , Allyl, 2-butenyl, pentyl. The number of carbon atoms of an alkynyl group is preferably from 2 to 20, more preferably from 2 to 12, and most preferably 2 \ 8. Examples of alkynyl groups include alkyne Propyl, 3-pentynyl. The number of carbon atoms of the aryl group is preferably 6 to 30, more preferably 6 to 20, and most preferably 6 to 12. Examples of the aryl group include a phenyl group and a p-methyl group. Phenyl and naphthyl. The number of carbon atoms of the substituted amine group is preferably 1 to 20, more preferably 1 to 10, and most preferably 1 to 6. Examples of the substituted amine group include a methylamine group and a dimethyl group. Amine group, diethylamino group, dipentylamino group. The number of carbon atoms of the alkoxy group is preferably from 1 to 20, more preferably from 1 to 12, and the most preferred. Examples of the alkoxy group include methoxy Group, ethoxy group, butoxy group. The number of carbon atoms of the aryloxy group is preferably 6 to 20, 6 to 6 16 is more preferable, and 6 to 12 is most preferable. Examples of the aryloxy group include phenoxy and 2-naphthyloxy. The number of carbon atoms of the fluorenyl group is preferably 1 to 2 0, and 1 to 16 is more preferable. Preferably, i ~ i 2 -26- 200526730 is the best. Examples of fluorenyl groups include ethyl fluorenyl, benzyl fluorenyl, methyl fluorenyl, and trimethyl ethyl fluorenyl. The number of carbon atoms in alkoxycarbonyl groups is 2 to 20 is preferable, 2 to 16 is more preferable, and 2 to 12 is most preferable. Examples of the alkoxycarbonyl group include a methoxycarbonyl group and an ethoxy curtain group. The number of carbon atoms of the aryloxycarbonyl group is 7 -20 is preferred, 7-16 is more preferred, and 7-10 is most preferred. Examples of aryloxycarbonyl groups include phenoxycarbonyl. The number of carbon atoms of fluorenyloxy is preferably 2-20, 2-16 More preferably, 2 to 10 is most preferable. Examples of the fluorenyl group include ethenyloxy and benzophenoxy. The number of carbon atoms of the fluorenyl group is preferably 2 to 20, and more preferably 2 to 16. 2 ~ 10 is the best. Examples of amido groups include acetamide and benzopyrene. The number of carbon atoms of the alkoxycarbonylamino group is preferably from 2 to 20, more preferably from 2 to 16, and 2 ~ 12 is the best. Examples of alkoxycarbonylamino groups include methoxycarbonyl The number of carbon atoms of the aryloxycarbonylamino group is preferably 7 to 20, more preferably 7 to 16 and most preferably 7 to 12. Examples of the aryloxycarbonylamino group include a phenoxycarbonylamine The number of carbon atoms of the sulfonamide group is preferably from 1 to 20, more preferably from 1 to 16, and most preferably from 1 to 12. Examples of the sulfonamide group include methanesulfonamide and benzsulfonamide. The number of carbon atoms of the substituted sulfamoyl group is preferably from 1 to 20, more preferably from 1 to 16, and most preferably from 1 to 12. Examples of substituted sulfamoyl groups include methylsulfamoyl, Methylaminesulfonyl and phenylaminesulfonyl. The number of carbon atoms of the substituted aminomethylsulfonyl is preferably 2-20, more preferably 2-16, and most preferably 2-12. Examples of the substituted carbamoyl group include carbamoyl, -27-200526730 methylamine carbamoyl, diethylamine carbamoyl, and phenylcarbamoyl. The number of carbon atoms of the alkylthio group is preferably from 1 to 20, more preferably from 1 to 16, and most preferably from 1 to 12. Examples of the alkylthio group include a methylthio group and an ethylthio group. The number of carbon atoms of the arylthio group is preferably 6 to 20, more preferably 6 to 16, and most preferably 6 to 12. Examples of arylthio include phenylthio. The number of carbon atoms of the sulfonyl group is preferably from 1 to 20, more preferably from 1 to 16, and most preferably from 1 to 12. Examples of sulfonyl include methanesulfonyl and ethylsulfonyl. The number of carbon atoms of the sulfenyl group is preferably 1 to 20, more preferably 1 to 16 and most preferably 1 to 12. Examples of sulfenyl groups include methanesulfinyl sulfonium and benzenesulfinyl sulfonium. The number of carbon atoms of the urea group is preferably from 1 to 20, more preferably from 1 to 16 'and 1 to 12 is most preferred. Examples of ureido include urea, methylurea, and phenylurea. The number of carbon atoms of the ammonium phosphate group is preferably 1 to 20, more preferably 1 to 16 and most preferably 1 to 12. Examples of the amidophosphate group include diethylamidophosphate and phenylammonium phosphate. The number of carbon atoms of the heterocyclic group is preferably 1 to 30, and more preferably 1 to 12. Examples of the hetero atom include a nitrogen atom, an oxygen atom, and a sulfur atom. Examples of heterocyclic groups include imidazolyl, pyridyl, quinolinyl, furanyl, piperidyl, morpholinyl, benzoxazolyl, benzimidazolyl, and benzothiazolyl. The carbon number of the silane group is preferably 3 to 40 carbon atoms, more preferably 3 to 30 carbon atoms, and most preferably 3 to 24 carbon atoms. Examples of the silyl group include trimethylsilyl and triphenylsilyl. In the general formula (I6), X is a trivalent group selected from B, C-R (R is a hydrogen atom or a substituent), N, P, and P = 0. X is preferably B, C-R, N, C-R, N is more preferable, and C-R is most preferable. -28- 200526730 Examples of substituents include aryl, amine, substituted amine, alkoxy, aryloxy, fluorenyl, alkoxycarbonyl, aryloxycarbonyl, fluorenyl, and fluorenylamine Group, alkoxycarbonylamino group, aryloxycarbonylamino group, sulfonamido group, warp group, hydrogenthio group, halogen atom (for example, fluorine atom, chlorine atom, bromine atom, spider atom), and carboxyl group. The substituents of R are preferably an aryl group, an alkoxy group, an aryloxy group, a hydroxy group, and a halogen atom, more preferably an alkoxy group and a hydroxy group, and most preferably a hydroxy group. The compound represented by the general formula (16) is more preferably a compound represented by the following general formula (17).

In the general formula (17), X2 is a trivalent group selected from b, C_R (R is a hydrogen atom or a substituent), and N. The S sheep detail of X 2 is the same as X of the general formula (16). In general formula (17), R ", R12, R13, R] 4, R15, r2], r22, R2 3, R2 4, R2 5, r31, r32, r33, r34 and r35 are each independently hydrogen Atom or substituent. The S-substances of the substituent are the same as the substituents of Q 1, Q 2 and Q 3 in the general formula (16).

Rn, R12, R13, R14, R15, R2 丨, R22, r23, r24, r25, -29- 200526730 R, Han 32, 1133, Han 34 and Yi 35 are alkyl, alkenyl, alkynyl, aryl , ^ Yl, substituted amino 'alkoxy, aryloxy, fluorenyl, alkoxycarbonyl, radical, fluorenyloxy, fluorenylamino, alkoxycarbonylamino, aryloxy ^ @ 醯 amino, Sulfamoyl, substituted sulfamoyl, carbamoyl 'substituted carbamoyl, alkylthio, arylthio, sulfofluorenyl, sulfinamidinyl, ^^^^^ enzyme amine, hydroxyl, Hydrogen-sulfur group, halogen atom (fluorine atom, chlorine atom, Y odor atom, iodine atom), cyano group, sulfofluorenyl group, carboxyl group, nitro group, hydroxamic acid group, Titanium I 4 × _ ®, hydrazine group, imine Heterocyclyl, silane, and alkyl are preferred. Alkyl, amino, substituted amino, alkoxy, and aryloxy are more preferred. Alkyl, aryl, and alkoxy are most preferred. ^ Substituents such as daggers may further contain substituents. A plurality of substituents may not be mutually bonded to each other, and a plurality of substituents may be bonded to each other to form a ring. [Optical anisotropy adjusting agent] Unlike a retardation reducing agent, a compound having a function of changing the optical anisotropy (β 卩 Re or Rth) of a cellulose acetate film can be added to the cellulose acetate film. The following describes these compounds (optical anisotropy adjusters). [Chemical formula 8] General formula (1) OR11 0 = P-OR12 OR13 In the formula, R 1 1 -13 each independently represents an aliphatic group having 1 to 20 carbon atoms. R 1 1 · 1 3 may be bonded to each other to form a ring. -30- 200526730 R 1 1 _1 3 is preferably an aliphatic group having a carbon number of 1 to 20, more preferably a carbon number of 1 to 16, and particularly preferably a carbon number of 1 to 12. Here, the aliphatic group is preferably an aliphatic hydrocarbon group, more preferably an alkyl group (including a locked, branched and cyclic alkyl group), an alkenyl group or an alkynyl group. Examples of the alkyl group include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, second butyl, third butyl, n-pentyl, third pentyl, n-hexyl , N-octyl, decyl, dodecyl, eicosyl, 2-ethylhexyl, pentyl, cyclohexyl, hexaheptyl, 2,6-dimethylcyclohexyl, 4-thyl Tributylcyclohexyl, cyclopentyl, 1-adamantyl, 2-adamantyl, bicyclo [2.2.2] octane-3-yl, etc. Alkenyl can be exemplified by ethylene, allyl, isopentyl Ludienyl, geranyl, oleyl, 2-cyclopenten-1-yl, 2-cyclohexene-1-yl, and the like. Examples of the alkynyl group include ethynyl and propargyl. The aliphatic group represented by R11 3 is substitutable. Examples of the substituent include a halogen atom (fluorine atom, chlorine atom, bromine atom, or iodine atom), and an alkyl group (including straight-chain, branched, and cyclic alkyl groups). , Bicycloalkyl, reactive methine), alkenyl, alkynyl, aryl, heterocyclyl (regardless of the position of substitution), fluorenyl, oxocarbonyl, aryloxycarbonyl, heterocyclooxycarbonyl, Carbamoyl, n-fluorenylaminocarbamyl, n-sulfonamidinylmethane, n-sulfanylmethylcarbamyl, n-aminosulfonylaminocarbamyl, carbazolyl, carboxyl, or a salt thereof, Ethylenediamine, amine® ethylenedifluorenyl, cyano, carbonimidoyl (Carbonimidoyl), formamidine, hydroxyl, alkoxy (including repeating groups containing ethoxy or propoxy units ), Square oxo, heterocyclic oxy, fluorenyl oxy, (co-oxy or aryloxy) ore oxy, carbamoyloxy, sulfonyloxy, amine, (alkyl, aryl or Heterocyclic) Amine, fluorenylamino, sulfonamido, ureido, thioureido, fluorenimine, (co-oxy or aryloxy) carbonylamino, aminesulfonylamino, ureaamine , Ammonium, amino ethylenediamine, n- (alkyl or aryl) sulfonylurea, n-fluorenyl urea, -3 1 · 200526730 n-fluorenyl iron, its salt, ethoxy Groups, ester groups or 6-membered 20 & phase-bonded integers -NR: cyclocolylaminesulfonamidoamine, heterocyclic groups containing a quaternized nitrogen atom (e.g., sulfonyl, imidazolyl, quinolinyl, Isoquinolinyl), isocyano, imine (alkyl or aryl) sulfonyl, (alkyl or aryl) sulfinyl, sulfo or, amine fluorenyl, n-fluorenyl amine Fluorenyl, n-sulfonylsulfenylsulfonyl or its scale, phosphinyl, phosphinyloxy, phosphinylamine, sulphonyl and the like. These groups may be further combined to form a composite substituent. Examples of such substitutions include ethoxyethoxyethyl, hydroxyethoxyethyl, carbonylcarbonylethyl and the like. In addition, R11 · 13 may contain a phosphoric acid ester as a substituent. The compound of general formula (1) may also have a plurality of phosphoric acids in the same molecule.

) m-General formula ⑵ General formula (3) In the general formulae (2) and (3), Z represents a carbon atom, an oxygen atom, and a sulfur atom. -NR25- 'R25 represents a hydrogen atom or an alkyl group. The 5 or ® ring containing z may contain a substituent. The Y21 · 22 series each independently represent a carbon number, to an ester group, an alkoxycarbonyl group, a fluorenylamino group, or a carbamoyl group, and Y2i · 22 may be bonded to each other to form a ring. m represents an integer of 1 to 5; η represents 1 to 6; in the general formulae (2) and (3), Z represents a carbon atom, an oxygen atom, a sulfur atom, and 5- 'R25 represents a hydrogen atom or an alkane base. 5 or 6-membered t-containing substituents consisting of Z may be bonded to each other to form a ring. Examples of the 5- or 6-membered ring containing -32- 200526730 z include tetrahydrofuran, tetrahydropyran, tetrahydrothiophene, thiazole, pyrrolidine, piperazine, indoman, isoindolin, chroman, Dichroman, tetrahydro-2-furanone, tetrahydro-2-pyrone, 4-butyrolactam, 6-caprolactam and the like. In addition, the 5- or 6-membered ring system composed of Z is a lactone structure or a lactam structure, that is, an adjacent cyclic ester structure or a cyclic amidine structure containing an oxygen group is included on the adjacent carbon of Z. Examples of such a cyclic ester or cyclic amidine structure include 2-pyrrolidone, 2-piperidone, 5-valerolactone, and 6-caprolactone. R25 represents a hydrogen atom, or an alkyl group having 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, and particularly preferably 1 to 12 carbon atoms (including locked, branched, and cyclic alkyl groups) base). Examples of the alkyl group represented by R 2 5 include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, second butyl, third butyl, n-pentyl, and third pentyl. , N-hexyl, n-octyl, decyl, dodecyl, eicosyl, 2-ethylhexyl, cyclopentyl, cyclohexyl, cycloheptyl, 2,6-dimethylcyclohexyl, 4_ Third butyl cyclohexyl, cyclopentyl, 1-adamantyl, adamantyl, bicyclo [2.2.2] octane-3-yl, and the like. The alkyl group represented by R25 may further contain a substituent, and examples of the substituent include, for example, the aforementioned R n · 1 3 substituent. The Y21〃2 system independently represents an ester group, an alkoxycarbonyl group, a fluorenylamino group, or a carbamoyl group. The ester group is preferably from 1 to 20 carbon atoms, more preferably from 1 to 16 carbon atoms, and particularly preferably from 1 to 12 carbon atoms. Examples thereof include ethoxyl, ethylcarbonyloxy, propylcarbonyloxy, n- Butylcarbonyloxy, isobutylcarbonyloxy, third butylcarbonyloxy, second butylcarbonyloxy, n-pentylcarbonyloxy, third pentylcarbonyloxy, n-hexylcarbonyloxy, Cyclohexylcarbonyloxy, 1-ethylpentylcarbonyloxy, n-heptylcarbonyloxy, n-nonylcarbonyloxy, n-undecylcarbonyloxy, pentadecyl-33-200526730 carbonyloxy , 1-naphthylcarbonyloxy, 2-naphthylcarbonyloxy, 1-adamantylcarbonyloxy and the like. The alkoxycarbonyl group is preferably 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, and particularly preferably 1 to 12 carbon atoms. Examples include methoxycarbonyl, ethoxycarbonyl, and n-propoxy groups. Carbonyl, isopropoxycarbonyl, n-butoxycarbonyl, third butoxycarbonyl, isobutoxycarbonyl, second butoxycarbonyl, n-pentoxycarbonyl, third pentoxycarbonyl, n-hexyloxy Carbonyl, cyclohexyloxycarbonyl, 2-ethylhexyloxycarbonyl, 1-ethylpropoxycarbonyl, n-octyloxycarbonyl, 3,7-dimethyl-3-octyloxycarbonyl, 3,5 , 5-trimethylhexyloxycarbonyl, 4-tert-butylcyclohexyloxycarbonyl, 2,4-dimethylpentyl-3-hydroxycarbonyl, 1-adamantyloxycarbonyl, 2-adamantane Oxycarbonyl, dicyclopentadienyloxycarbonyl, n-decyloxycarbonyl, n-dodecyloxycarbonyl, n-tetradecyloxycarbonyl, n-hexadecyloxycarbonyl and the like. The amido group is preferably a carbon number of 1 to 20, more preferably a carbon number of 1 to 16, and particularly preferably a carbon number of 1 to 12, and examples thereof include ethylamine, ethylcarboxamide, and n-propylcarboxamide. , Isopropylcarboxamide, n-butylcarboxamide, third butylcarboxamide, isobutylcarboxamide, second butylcarboxamide, n-pentylcarboxamide, third pentylcarboxamide Pyridamine, n-hexylcarboxamide, cyclohexylcarboxamide, 1-ethylpentylcarboxamide, 1-ethylpropylcarboxamide, n-heptylcarboxamide, n-octylcarboxamide, 1 -Adamantanecarboxamide, 2-adamantylcarboxamide, n-nonylcarboxamide, n-dodecylcarboxamide, n-pentadecylcarboxamide, n-hexadecylcarboxamide, and the like. The carbamoyl group is preferably from 1 to 20 carbon atoms, more preferably from 1 to 16 carbon atoms, and particularly preferably from 1 to 12 carbon atoms, and examples thereof include methylaminomethylamino, dimethylaminomethylamino, ethyl Methylamine formamyl, diethylamine formamyl, n-propylamine formamyl, isopropylamine formamyl, n-butylaminoformamyl, third butylaminoformamyl, isobutyl Aminomethylamidino, second butylaminomethylamidino, n-pentylaminomethylamidino, thirdpentylaminomethylamidino, n-hexylaminomethylamidino, cyclohexyl-34-200526730 methylaminomethyl, 2-ethylhexylamine formamyl, 2-ethylbutylamine formamyl, third octylamine formamyl, n-heptylamine formamyl, n-octylamine formamyl, 1-adamantane Carbamate, 2-adamantylamine carbamate, n-decylamine carbamate, n-dodecylamine carbamate, n-tetradecylamine carbamate, n-hexadecylamino carba Base etc. Y21-22 can be bonded to each other to form a ring. Y2! · 22 may further contain a substituent, and examples thereof include the aforementioned R11 · 13 substituent. 【化 1 〇】 General formula (1 4)

R4-1—R5 II 0 [wherein R4 and R5 each independently represent an alkyl group or an aryl group. The total number of carbon atoms of R4 and R5 is 10 or more, and each alkyl group and aryl group may have a substituent.] In the general formula (14), R4 and R5 each independently represent an alkyl group or an aryl group. The total number of carbon atoms in R4 and R5 is 10 or more, and each alkyl group and aryl group may have a substituent. The substituent is preferably a fluorine atom, an alkyl group, an aryl group, an alkoxy group, a sulfo group, and a sulfonamido group, and an alkyl group, an aryl group, an alkoxy group, a sulfo group, and a sulfonamido group are particularly preferable. In addition, the alkyl group may be straight-locked, branched or cyclic, preferably having 1 to 25 carbon atoms, more preferably 6 to 25, and 6 to 20 (for example, methyl, ethyl, propyl, isopropyl Base, butyl, isobutyl, third butyl, pentyl, isopentyl, third pentyl, hexyl, cyclohexyl, heptyl, octyl, bicyclooctyl, nonyl, adamantyl, decyl Base, third octyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, cetyl, heptadecyl, octadecyl, nonadecane And eicosyl) are particularly preferred. The aryl group is preferably one having 6 to 30 carbon atoms, and 6 to 24 (eg, phenyl, bi-35-200526730 benzene, terphenyl, naphthyl, bipernaphthyl, triphenylphenyl) good. Preferred examples of the compound represented by the general formula (14) are shown below, but the present invention is not limited by these specific examples.

-36-200526730

-37-200526730

-38- 200526730 [Chem. 1 3] General formula (1 5> Ο

In the above general formula (15), R1, R2 and R3 are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms (for example, methyl, ethyl, propyl, isopropyl, isopropyl, butyl, Pentyl, isopentyl) is preferred, and at least i or more of R1, R2, and R3 are alkyl groups having 1 to 3 carbon atoms (for example, methyl, ethyl, propyl, and isopropyl) are particularly preferred. X is a single bond, -0, -CO-, or alkylene (preferably 1 to 6 carbon atoms, more preferably 1 to 3, for example, selected from methylene, ethylene, and propylene) Diphenyl group) or arylene group (preferably 6 to 24 carbon atoms, more preferably 6 to 12 groups, such as phenylene, biphenylene, and naphthylene). A divalent linking group formed by one or more types selected from -0, alkylene, or arylene is particularly preferred. Y is a hydrogen atom or an alkyl group (preferably 2 to 25 carbon atoms, more preferably 2 to 20 carbon atoms. For example, ethyl, isopropyl, third butyl, hexyl, 2-ethylhexyl, and Trioctyl, dodecyl, cyclohexyl, dicyclohexyl, adamantyl), aryl (preferably 6 to 24 carbon atoms, more preferably 6 to 18). For example, phenyl, biphenyl, Terphenyl, naphthyl) or aromatic radical (preferably 7 to 30 carbon atoms, more preferably 7 to 20. For example, benzyl, tolyl, third butylphenyl, diphenylmethyl, Triphenylmethyl) is particularly preferred. Alkyl, aryl or aralkyl is particularly preferred. The combination of -χ-γ is preferably a total carbon number of -X_Υ of 0 to 40, more preferably 1 to 30, and most preferably 1 to 25. -39- 200526730 [Chem. 1 4] General formula (1 8) OR3 R1—CN-R2 [wherein R1 represents an alkyl group or an aryl group, and R2 and R3 each independently represent a hydrogen atom, an alkyl group or an aromatic group. base. The alkyl group and the aryl group may have a substituent] The general formula (18) is preferably a compound represented by the following general formula (19). General formula (1 9 > O R6 r4-cn-r5 In the general formula (19), R4, R5 and R6 each independently represent an alkyl group or an aryl group. Here, the alkyl group may be It is straight-locked, branched or cyclic, with 1 to 20 carbon atoms being preferred, 1 to 15 being more preferred, and 1 to 12 being most preferred. Cycloalkyl is particularly preferably cyclohexyl. The aryl group is preferably 6 to 36 carbon atoms, and more preferably 6 to 24. The above-mentioned alkyl group and aryl group may have a substituent, and the substituent group is a halogen atom (such as chlorine, bromine, fluorine, and iodine). ), Alkyl, aryl, alkoxy, aryloxy, fluorenyl, alkoxycarbonyl, aryloxycarbonyl, fluorenyl, sulfonamido, hydroxy, cyano, amine, and fluorenylamino More preferred, more preferably halogen, alkyl, aryl, alkoxy, aryloxy, sulfonylamino and fluorenylamino, particularly preferred are alkyl, aryl, sulfonylamino and fluorenylamine. The following are examples of preferred examples of the compound represented by general formula (18) or general formula (19), but the present invention is not limited by these specific examples. -40- 200526730 [Chem. 16 FA-

O ch3

FA-2 FA, 3O ^ rO O ^ -i1 C2H5 C3H7

FA-4 FA-5 FA-6 FA-7 FA-8 〇τ < ^ ή

o-h < y ^ o CHy ch3 FA-9

FA-JO? ./= \ h3c o FAll FA-12 〇-τέ,-

O C-N

CH

° ~ ύ

Or O ί-ν ch3

ch3 -41 200526730 FA-18 FA-19 FA-20

FA-23

Minutes; 5〇

FA-28

-42- 200526730 FB-2 FB-3

-43-200526730 [Chem. 1 9]

FB-I9 FB-18

FB-20

Cl

Cl

FB-21 FB-22

-44- 200526730 .9 * p o NIC NIC 2 o = c-os- 广 6 46 FC-Fc

-2 C- F

p T one 3 FC-Bu1 one 0

FC-7 FC-8 CHa

o Γ \ -ϊ

C-N CH5 FC-9 FC-10 ^ {? A :; h3c o FC-11 FC-12, 丨 LCH3 6

one

H3 N 丨 ch sv 0 FC-13 FC-14 ～ FC-15

200526730 [Chemical 2 1] FC-18 FC-19 h3c〇—each one ί4 one ^] CH,

C—N I CH

FC-20

O

fVS

C-M

FC-22 ό FC-21

Cl

FC-24 FC-25

-46- 200526730 [Chemical 22 FD-1 FD-2 FD-3 0 ^ -0 ch3 ch:

C ~ N CH

FD-4 FD-5

o

o M C-N

FD-7 FD-6

O

HsCHiCHjCHzCHC-C-N H3CH2C CH CH-

-47-200526730

[Wavelength Dispersion Adjusting Agent] The cellulose acetate film of the present invention is characterized in that Rth (including any Re) is small. Depending on the wavelengths of Re and Rth, a small wavelength dependency is also desirable. Here, the means for reducing the wavelength dispersion is effective in adding a compound (hereinafter referred to as a wavelength dispersion adjusting agent) -48- 200526730 to the cellulose acetate film to adjust the wavelength dispersion. The relationship between Re and Rth of cellulose acetate film has a wavelength dispersion characteristic that is generally larger on the long wavelength side than on the short wavelength side. Therefore, it is required to make the wavelength dispersion smooth by increasing the relatively small short-wavelength Re and Rth. On the other hand, compounds containing absorption in the ultraviolet range of 200 to 40 Onm have a wavelength dispersion characteristic in which the absorbance at the long wavelength side is larger than that at the short wavelength side. Therefore, as described above, the wavelength dispersion of Re and Rth of the cellulose acetate film can be adjusted by using the shorter wavelength side of the wavelength dispersion of Re and Rth of the compound itself which is expected to have an absorption in the ultraviolet region of 200 to 400 nm. For this reason, it is required to adjust the wavelength dispersion of the compound so that the polymer solid content is sufficiently uniformly compatible. The absorption band range of these compounds in the ultraviolet region is preferably 200 to 400 nm, more preferably 220 to 395 nm, and even more preferably 240 to 390 nm. In addition, in recent years, liquid crystal display devices such as televisions, personal computers, and portable portable terminal devices have been required to have excellent transmittance of optical members used for the liquid crystal display devices in order to increase the brightness with relatively low power. At this point, when a compound having | Re (400) —Re (700) | and | Rth (400) -Rth (700) | having absorption in the ultraviolet region of 200 to 400 nm and reducing the film is added to the cellulose acetate film, The system requires excellent spectral transmittance. It is desirable that the cellulose acetate film of the present invention has a spectral transmittance at a wavelength of 380 nm of 45% or more and 95% or less' and a spectral transmittance at a wavelength of 350 nm of 10% or less. As described above, the wavelength dispersion adjusting agent which is preferably used in the present invention is preferably g in terms of molecular weight from 250 to 10,000. It is more preferably 260 to 800, more preferably 270 to 800, and particularly preferably 300 to 800. According to these molecular weight ranges, a specific monomer structure may be used, and the monomer unit may be a oligomer structure or a polymer structure in which plural types are combined in 200526730. It is preferable that the wavelength dispersion adjusting agent is not dispersed during the process of casting and drying the dope made of cellulose acetate film. (Addition amount of wavelength dispersion adjusting agent) The above-mentioned addition amount of the wavelength dispersion adjusting agent used in the present invention is more preferably from 0.0 1 to 30% by weight of cellulose acetate. 〇 · 1 to 20% by weight is preferred. Preferably, 0.2 to 10% by weight is particularly preferred. (Method of Adding Compounds) These wavelength dispersion adjusting agents may be used alone or in combination of two or more chemical compounds at an arbitrary ratio. The timing for adding these wavelength dispersion adjusting agents may be any period in the dope preparation step, or may be performed at the end of the dope preparation step. Specific examples of the wavelength dispersion adjusting agent preferably used in the present invention include benzotriazole-based compounds, benzophenone-based compounds, cyano-containing compounds, oxybenzophenone-based compounds, and salicylic acid. Ester compounds, nickel salt compounds, etc., but the present invention is not limited by these compounds. A benzotriazole-based compound, preferably one represented by the general formula (1 0 1), is used as the wavelength dispersion adjusting agent of the φ invention.

General formula (101) Q1—Q2-〇H (where Q1 represents a nitrogen-containing aromatic heterocyclic ring, Q2 represents an aromatic ring) Q1 represents a nitrogen-containing aromatic heterocyclic ring, preferably 5 to 7 members Nitrogen-containing aromatic heterocycles, more preferably 5- to 6-membered nitrogen-containing aromatic heterocycles, such as imidazole, pyrazole, triazole, tetrazole, thiazole, oxazole, selenazole, benzotriazole, Benzothiazole, benzoxazole, benzoselazole, thiaditon, oxadiazole, -50- 200526730 naphthalothiazole, naphthozole, acryl benzimidazole, purine, pyridine, pyrimidine, pyrimidine, dagen, Triadine, triazindene, syringa, etc., more preferably 5-membered nitrogen-containing aromatic heterocyclic rings, specifically, imidazole, pyrazole, triazole, tetrazole, thiazole, oxazole, benzotriazole , Benzothiazole, benzoxazole, thiadiazole, and epidiazole are preferred, and benzotriazole is particularly preferred. The nitrogen-containing aromatic heterocyclic ring represented by Q 1 may further contain a substituent, and a substituent T described later is used as the substituent. When a substituent is plural, it may be condensed to form a ring. The aromatic ring represented by Q2 may be an aromatic hydrocarbon ring or an aromatic hetero ring. In addition, it may be a single ring, and may further form a condensed ring with other rings. The aromatic hydrocarbon ring is preferably a monocyclic or bicyclic aromatic hydrocarbon ring having 6 to 30 carbon atoms (for example, a benzene ring and a naphthalene ring), and more preferably an aromatic ring having 6 to 20 carbon atoms. The hydrocarbon ring, more preferably an aromatic hydrocarbon ring having 6 to 12 carbon atoms, is more preferably a benzene ring. The aromatic hetero ring is preferably an aromatic hetero ring containing a nitrogen atom or a sulfur atom. Specific examples of the heterocyclic ring include, for example, thiophene, imidazole, pyrazole, pyridine, pyridine, datra, triazole, triple well, indole, indazole, purine, thiazole, thiazole, thiadiazole, and thiazole. , Oxazole, oxadiazole, quinoline, isoquinoline, fluorene, naphthalene, quinoxaline, quinazoline, oxoline, pteridine, acridine, phenanthroline, phenone, tetrazole, benzo Imidazole, benzoxazole, benzothiazole, benzotriazole, tetrasalix, etc. The aromatic heterocyclic ring is preferably pyridine, triple well, or quinone. The aromatic ring represented by Q2 is preferably an aromatic hydrocarbon ring, more preferably a naphthalene or benzene ring, and particularly preferably a benzene ring. Q2 may further contain a substituent, of which the substituent T described later is preferred. The substituent T is, for example, an alkyl group (preferably having 1 to 2 carbon atoms, more preferably 1 to 12 carbon atoms, particularly preferably 1 to 8 carbon atoms), and examples thereof include methyl, ethyl, and isopropyl 200526730. Base, third butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl, cyclohexyl, etc.), alkenyl (preferably 2 to 20 carbons, more preferably carbon Number 2 to 12, particularly preferably 2 to 8, carbon number, for example, ethylene, allyl, 2-butenyl, 3-pentenyl, etc., alkynyl (preferably carbon number 2 to 20, more The number of carbon atoms is preferably 2 to 12, and the number of carbon atoms is particularly preferably 2 to 8. Examples include propargyl, 3-pentynyl, etc., aryl (preferably 6 to 30 carbon atoms, and more preferably 6 to 6 carbon atoms). ~ 20. Particularly preferred is carbon number 6 ~ 12. Examples include phenyl, p-methylphenyl, naphthyl, etc., substituted or unsubstituted amine group (preferably carbon number 0 to 20, more preferably Carbon number 0 to 10, particularly preferably carbon number 0 to 6, including, for example, amine, methylamino, dimethylamino, diethylamino, dipentylamino, etc.), alkoxy (It is preferably 1 to 20 carbons, more preferably 1 to 12 carbons, and particularly preferably 1 to 8 carbons. Examples include methoxy and ethoxy. Butoxy, etc.), aryloxy (preferably 6 to 20 carbons, more preferably 6 to 16 carbons, particularly preferably 6 to 12 carbons, for example, phenoxy, 2-naphthyloxy, etc. ), Fluorenyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example, ethenyl, benzamyl, formamyl, trimethyl Ethoxyl groups, etc.), alkoxy groups ($ parent is 2 to 20 carbons, more preferably 2 to 16 carbons, particularly preferably 2 to 12 'carbons, for example, methoxycarbonyl, ethyl Oxycarbonyl, etc.), aryloxycarbonyl (preferably 7 to 20 carbons, more preferably 7 to 16 carbons, particularly preferably 7 to 10 carbons, for example, phenoxycarbonyl, etc.), fluorene Group (preferably 2 to 20 carbons, more preferably 2 to 16 carbons, particularly preferably 2 to 10 carbons, for example, ethoxyl, benzyloxy, etc.), fluorenylamino (Preferably 2 to 20 carbons, more preferably 2 to 16 carbons, particularly preferably 2 to 10 carbons, for example, ethylamidoamino, benzamidoamino, etc.), alkoxycarbonyl Amine group (preferably 2 to 20 carbons, more preferably 2 to 16 carbons, particularly preferably 2 to 12 carbons, for example, methoxycarbonylamino groups, etc. ), Aryloxycarbonylamino (preferably 7-20 carbons, more preferably 7-16 carbons, particularly preferably -52- 200526730 7-12, for example, phenoxycarbonylamino groups, etc. ), Sulfonamide (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example, methanesulfonamido, benzenesulfonamido, etc.) Sulfamoyl (preferably carbon number 0-20, more preferably carbon number 0-16, particularly preferably carbon number 0-12), for example, sulfamoyl, methylaminosulfamoyl, dimethyl Aminosulfonyl, phenylaminesulfonyl, etc.), carbamoyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons), for example, Carbamate, methylcarbamate, diethylcarbamate, phenylcarbamate, etc.), sulfanyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons) Particularly preferred is carbon number 1 ~ 12, for example, methylthio group, ethylthio group, etc.), square sulfur group (preferably 6-20 carbon number, more preferably 6-16 carbon number, particularly preferred carbon number) 6 ~ 12, for example, phenylthio, etc.), sulfofluorenyl (preferably carbon number 1 to 20, more preferably carbon number 1 to 16, particularly preferred) The carbon number is 1 to 12, and examples include methylsulfonyl, ethylsulfonyl, etc.), sulfinylsulfonyl (preferably carbon number 1-20, more preferably carbon number 1-16, particularly preferably carbon number 1). ~ 12, for example, methanesulfinyl sulfonium, benzenesulfinyl sulfonium, etc.), ureido (preferably carbon number 1-20, more preferably carbon number 1-16, particularly preferably carbon number 1-12, for example Such as urea, methylurea, phenylurea, etc.), amido phosphate (preferably carbon number 1-20, more preferably carbon number 1-16, particularly preferably carbon number 1-12, for example diethyl Methylphosphonium phosphate, phenylphosphonium phosphate, etc.), hydroxyl, hydrogenthio, halogen atom (such as fluorine atom, chlorine atom, bromine atom, iodine atom), cyano, sulfo, carboxyl, nitro, hydroxamic acid Group, phosphinyl group, hydrazino group, imino group, heterocyclic group (preferably 1 to 30 carbon atoms, more preferably 1 to 12, hetero atom system such as nitrogen atom, oxygen atom, sulfur atom, specifically, for example Imidazolyl, pyridyl, quinolinyl, furyl, piperidyl, morpholinyl, benzoxazolyl, benzimidazolyl, benzothiazolyl, etc.), silyl (preferably carbon number 3 ~ 40. Better carbon number is 3 ~ 30. The number of carbon atoms is 3 to 24, and examples thereof include trimethylsilyl group, 200526730 triphenyl sand group, and the like. These substituents may be further substituted. In addition, two or more substituting groups may be the same or different. Also, where possible 〃 can be bonded to each other to form a ring. The general formula (ι〇υ) is preferably a compound represented by the following general formula (101-A). General formula (101-A) [Chem. 24]

R2 (wherein 'R1, R2, R3', R4, R5, r6, and r8 each independently represent a hydrogen atom or a substituent) R1 'R2, R3, R4, R5, R6, R7, and R8 each Do not independently represent a hydrogen atom or a substituent, and the substituent T described above may be applied. and,

These substituents may be further substituted with other substituents, and the substituents may be ring-condensed with each other to form a ring structure. I R1 and R3 are preferably a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amine group, an alkoxy group, an aryloxy group, a hydroxyl group, or a halogen atom, more preferably a hydrogen atom or an alkane Group, aryl group, alkoxy group, aryloxy group, and halogen atom, more preferably a hydrogen atom and a carbon group of 1 to: 12 alkyl groups, particularly preferably an alkyl group of carbon numbers i to i 2 (preferably carbon number 4) ~ 1 2). R2 and R4 are preferably a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amino group, an alkoxy group, an aryloxy group, a hydroxyl group, and a halogen atom, and more preferably a hydrogen atom or an alkane group. Group, aryl group, alkoxy group, aryloxy group, and halogen atom, -54-200526730 is more preferably a hydrogen atom and a carbon group of 1-12, particularly preferably a hydrogen atom and a methyl group, and most preferably a hydrogen atom. R5 and R8 are preferably a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amine group, an alkoxy group, an aryloxy group, a hydroxyl group, or an atom, more preferably a hydrogen atom or an alkyl group , Aryl, alkoxy, aryloxy, and halogen atoms, more preferably a hydrogen atom, a carbon group of 1 to 12 alkyl, particularly preferably a hydrogen atom, a methyl group, and most preferably a hydrogen atom. R6 and R7 are preferably a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amine group, an alkoxy group, an aryloxy group, a hydroxyl group, or a tooth atom, and more preferably a hydrogen atom or an alkyl group , An aryl group, an alkoxy group, an aryloxy group, and a halogen atom, more preferably a hydrogen atom and a halogen atom, and particularly preferably a hydrogen atom and a chlorine atom. The general formula (101) is more preferably a compound represented by the following general formula (101-B). General formula (101-B) [Chemical formula 25]

(In the formula, R], R3, R6 and R7 are synonymous with those in the general formula (101-A), and the preferred ranges are also the same. However, the present invention is not limited by any specific examples described below. -55- 200526730 υν · ι UV-2 UV-3 C UV-4 θιυν-5

UV-7

UV-8 ϋν · 9

200526730 【Chemical 27】 UV-13 UV-12

UV-16

UV-15 UV-20

-57-200526730 Among the benzotriazole compounds listed in the above examples, even if the transparent film of the present invention is produced without containing a molecular weight of 3 to 20, the point of retention is confirmed to be advantageous. In addition, as the benzophenone-based compound, which is one of the wavelength dispersion adjusting agents used in the present invention, it is preferable to use one represented by the general formula (102). General formula (1 02)

(In the formula, Q 1 and Q 2 each independently represent an aromatic ring. X represents NR (R represents a hydrogen atom or a substituent), an oxygen atom, or a sulfur atom.) The aromatic rings represented by Q 1 and Q 2 may be Aromatic hydrocarbon ring or aromatic heterocyclic ring. In addition, it may be a single ring, and may further form a condensed ring with another ring. The aromatic hydrocarbon rings represented by Q1 and Q2 are preferably (preferably monocyclic or bicyclic aromatic hydrocarbon rings (e.g., benzene ring, naphthalene ring, etc.) having 6 to 30 carbon atoms), and more preferably 6 to 6 carbon atoms. 20 aromatic hydrocarbon rings, more preferably aromatic hydrocarbon rings having 6 to 12 carbon atoms) more preferably benzene rings. The aromatic heterocyclic ring represented by Q1 and Q2 is preferably an aromatic heterocyclic ring containing at least one of an oxygen atom, a nitrogen atom, or a sulfur atom. Specific examples of the heterocyclic ring include furan, pyrrole, thiophene, imidazole, pyrazole, pyridine, mouth-to-mouth ratio, da trap, triazole, triple trap, indole, indazole, purine, thiazole trap, thiazole, and thiadiazole , Oxazole, oxazole, oxadiazole, quinone, isoquinol, koutaiming1, naphthalene tablets, quinoxaline, quinazoline, oxazoline, pteridine, acridine, phenanthrene-58- 200526730 Phenols, phen wells, tetrazoles, benzimidazoles, benzoxazoles, benzothiazoles, benzotriazoles, tetrasalix, etc. The aromatic heterocyclic ring is preferably pyridine, triple well, or quinone. The aromatic ring represented by Q1 and Q2 is preferably an aromatic hydrocarbon ring, more preferably an aromatic hydrocarbon ring having 6 to 10 carbon atoms, and even more preferably a substituted or unsubstituted benzene ring. Q1 and Q2 may further contain a substituent, and the later-mentioned substituent τ is preferred. However, the substituent does not include carbonic acid, sulfonic acid, or a quaternary ammonium salt. Further, the substituents may be bonded to each other to form a ring structure when possible. X represents NR (R represents a hydrogen atom or a substituent. Substituents T, which will be described later may be used), an oxygen atom, or a sulfur atom. X is preferably a fluorenyl group, a sulfonyl group, and the like. It may be further substituted), or an oxygen atom, particularly preferably an oxygen atom. Examples of the substituent T include an alkyl group (preferably a carbon number of 1 to 20, more preferably a carbon number of 1 to 12, and particularly preferably a carbon number of 1 to 8, and examples thereof include methyl, ethyl, isopropyl, Tertiary butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl, cyclohexyl, etc.), flammable group (preferably carbon number 2 to 20, more preferably carbon number 2 ~ 12. Particularly preferred is carbon number 2 ~ 8, for example, ethylene, allyl, 2-butanyl, 3-pentenyl, etc., alkynyl (preferably carbon number 2 ~ 20, more preferably Carbon number 2 ~ 12, particularly preferably carbon number 2 ~ 8, for example, propargyl, 3-pentynyl, etc.), aryl (preferably 6-30 carbon number, more preferably 6-20 carbon number) Particularly preferred is 6 to 12 carbons, for example, phenyl, p-methylphenyl, naphthyl, etc., substituted or unsubstituted amine (preferably 0 to 20 carbons, more preferably 0 carbons) ~ 10. Particularly preferred is carbon number 0 ~ 6. Examples include amine, methylamino, dimethylamino, diethylamino, dipentylamino, etc.), alkoxy (preferably Carbon number 1 to 20, more preferably carbon number 1 to 12, particularly preferably carbon number 1 to 8, for example, methoxy, ethoxy, butoxy, etc. ), Aryloxy (preferably 6 to 20 carbons, more preferably 6 to 16 carbons, particularly preferred is -59- 200526730 6 to 12, for example, phenoxy, 2-naphthyloxy, etc. ), Fluorenyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example, ethenyl, benzamyl, formamyl, trimethyl Ethoxy, etc.), alkoxycarbonyl (preferably 2 to 20 carbons, more preferably 2 to 16 carbons, particularly preferably 2 to 12 carbons, for example, methoxycarbonyl, ethoxy Carbonyl, etc.), aryloxycarbonyl (preferably 7 to 20 carbons, more preferably 7 to 16 carbons, particularly preferably 7 to 10 carbons, for example, phenoxycarbonyl, etc.), fluorenyl ( It is preferably 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, particularly preferably 2 to 10 carbon atoms, and examples thereof include ethoxyl, benzamyloxy, and the like. 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, particularly good 2 to 10 carbon atoms, for example, ethylamino, benzamidineamino, etc.), alkoxycarbonylamino (It is preferably 2 to 20 carbons, more preferably 2 to 16 carbons, and particularly preferably 2 to 12 carbons. For example, methoxycarbonylamine Etc.), aryloxycarbonylamino (preferably 7 to 20 carbons, more preferably 7 to 16 carbons, particularly preferably 7 to 12 carbons, for example, phenoxycarbonylamino groups, etc.), sulfo Sulfonylamino group (preferably 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, particularly preferably 1 to 12 carbon atoms, for example, methanesulfonylamino group, benzenesulfonylamino group, etc.), sulfonamide Fluorenyl (preferably 0 to 20 carbons, more preferably 0 to 16 carbons, particularly preferably 0 to 12 carbons), for example, sulfamoyl, φmethylaminosulfonyl, dimethylamine Sulfonyl, phenylamine sulfonyl and the like), carbamoyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example amine methyl Fluorenyl, methylaminomethylmethyl, diethylaminomethylmethyl, phenylaminomethylmethyl, etc.), alkylthio (preferably 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, The number of carbon atoms is preferably 1 to 12, and examples thereof include methylthio, ethylthio, etc.), arylthio (preferably 6 to 20 carbons, more preferably 6 to 16 carbons, and particularly 6 to 6 carbon atoms) 12, for example, phenylthio, etc.), sulfofluorenyl (preferably carbon number 1 to 20, more preferably carbon number 1 to 1) 6, particularly preferably carbon number 1 12, 2, for example, methylsulfonyl, ethyl-60-200526730 sulfonyl, etc.), sulfinyl (preferably carbon number 1-20, more preferably carbon number 1-16, / particularly preferably carbon Numbers 1 to 12 include, for example, methanesulfinyl sulfonium, benzenesulfinyl sulfonium, etc.), ureido (preferably carbon number 1-20, more preferably carbon number 1-16, particularly preferably carbon number 1-12 Examples include urea, methylurea, phenylurea, etc., amido phosphate (preferably carbon number 1-20, more preferably carbon number 1-16, particularly preferably carbon number 1-12, examples can be given) Such as diethylphosphonium phosphate, phenylphosphonium phosphate, etc.), hydroxyl, hydrogenthio, halogen atom (such as fluorine atom, chlorine atom, bromine atom, iodine atom), cyano group, sulfo group, carboxyl group, nitro group, Hydroxamic acid group, phosphine group, hydrazine group, imide group, heterocyclic group (preferably 1 to 30 carbon atoms, more preferably 1 to 12, hetero atom system such as nitrogen atom, oxygen atom, sulfur atom, specific In terms of, for example, imidazolyl, pyridinyl, quinolinyl, sulfanyl, molybdenyl, morpholinyl, benzoepinyl, benzimidyl, benzothiazolyl, etc.), silyl (3 ~ 40 carbon number is preferred, carbon number 3 is more preferred ~ 30, particularly preferably 3 to 24 carbon atoms, for example, trimethylsilyl, triphenylsilyl, etc.). These substituents may be further substituted. When there are two or more substituents, they may be the same or different. Furthermore, they may be bonded to each other to form a ring when possible. The general formula (102) is preferably a compound represented by the following general formula (102-A). General formula (102-A)

-61- 200526730 respectively on the surface and each other alkenyl group: aryloxy atom alkane without hydrogen atom alkoxy alkane without hydrogen atom 1 ~ 20 methyl. (Wherein Ri, R2, R3, r4, r5 independently represent a hydrogen atom or a substituent) R, R2, r4, R5, r6 are not hydrogen atoms or substituents, and these substituents may be further condensed by substitution To form a ring structure. R, R8, and R9 are each independently ® applicable to the aforementioned substituent T. Substituted by other substituents

R

R

RR and R9 are preferably a hydrogen atom, an alkyl group, an alkynyl group, an aryl group, a substituted or unsubstituted group, a alkynyl group, an alkoxy group, an aryloxy group, and a halogen atom, more preferably a hydrogen atom, a fluorenyl group, An aryl group, an alkoxy group, a group, and a halogen atom are more preferably a hydrogen atom, an succinyl butane 1 to 12 alkyl group, particularly preferably a hydrogen atom, a methyl group, and most preferably a hydrogen atom. R is preferably a hydrogen atom, an alkyl group, an alkenyl group, a naphthyl group, an alkynyl group, an aryl group, a substituted or substituted amine group, an alkoxy group, an aryloxy group, a pentyl group, a hydroxy group, a halogen atom, More preferred are carbon, alkyl having 1 to 20 carbons, amino having 0 to 20 carbons, 12 oxo carbons, 6 to 12 aryloxy carbons, hydroxyl groups, and more preferably 2 carbons. The radical '' is particularly preferably an alkoxy group having 1 to 12 carbon atoms. R is preferably a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or substituted amine group, an alkyloxy group, an aryloxy group, a hydroxyl group, a halogen atom, more preferably a group of 1 to 20 carbon atoms. Alkyl group, amine group with 0 to 2 carbon atoms, 2 oxy group with carbon number, 6 to 12 aryloxy group, hydroxy group, more preferably a hydrogen atom, carbon number alkyl group (preferably 1 to 12 carbon number) , More preferably carbon number 1 to 8, more preferably), particularly preferably a methyl group and a hydrogen atom. —General formula (102) is more preferably a compound represented by the following general formula (102-B): General formula (102-B)

-62-200526730 30

(In the formula, R G represents a hydrogen atom, a substituted or unsubstituted alkenyl group, an unsubstituted alkyl group, an aryl group, and a substituted alkynyl group, substituted or unsubstituted.

RlG represents a hydrogen atom, a substituted or unselected extremely sweet; a carbyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted vertical substituted or unsubstituted aryl group, and the aforementioned substituents may be applicable to the substituent Τ. R1. Preferred is a substituted or unsubstituted academic group, more preferably a substituted or unsubstituted carbon group having 5 to 20 carbon atoms, and even more preferably a substituted or unsubstituted f group (n-hexyl, 2 carbon group) having 5 to 12 carbon atoms. _Ethylhexyl, n-octyl, n-decyl, n-dodecyl, benzyl, etc.), particularly preferably substituted or unsubstituted alkyl having 6 to 12 carbon atoms (2-ethylhexyl, n-octyl Group, n-decyl, n-dodecyl, benzyl). —The compound represented by the general formula (102) is synthesized according to a known method described in Japanese Patent Application Laid-Open No. i__i 2 2 i 9. The following are specific examples of the compound represented by the general formula (102), and the present invention is not limited by any specific examples described below. -63-200526730 [Chemical 3 1] UV-101

UV-103

O OH

-64- 200526730 【· Chemical 32】 UV-104

UV-109 UV-110

UV-106 UV-111 _

-65- 200526730 [Chemical 3 3]

UV-114

UV419

UV-115

H3CO

OCi2H25 (n)

Moreover, it is preferable that the cyano group-containing compound as one of the wavelength dispersion adjusting agents used in the present invention is a compound represented by the general formula (103). General formula (1 03) [Chemical 3 4]

X2 Q2 -66- 200526730 (where Q1 and Q2 each independently represent an aromatic ring. X1 and X2 each represent a hydrogen atom or a substituent, and at least one of them represents a cyano group, a carbonyl group, a sulfofluorenyl group, and an aromatic group The heterocyclic ring) (51 and Q2 may be an aromatic hydrocarbon ring or an aromatic heterocyclic ring. It may be a monocyclic ring and may further form a condensed ring with other rings. The aromatic hydrocarbon ring is preferably (Preferably a monocyclic or bicyclic aromatic hydrocarbon ring (e.g., benzene ring, naphthalene ring, etc.) having 6 to 30 carbon atoms, more preferably an aromatic hydrocarbon ring having 6 to 20 carbon atoms, more preferably 6 carbon atoms Aromatic hydrocarbon rings of ~ 12) are more preferably benzene rings. The aromatic heterocyclic ring is preferably an aromatic heterocyclic ring containing a nitrogen atom or a sulfur atom. Specific examples of the heterocyclic ring include thiophene, imidazole, pyrazole, pyridine, Pycnogenol, Datra, Trizo, Santo, indole, indazole, purine, thiazole, thiazole, thiadiazole, oxazole, oxazole, oxadiazole, quinone, isoquinone, hydrazone, Naphthol, quinoxaline, quinazoline, oxoline, pteridine, acridine, phenanthroline, phenone, tetrazole, benzimidazole, benzoxazole, benzothiazole, benzene Triazole, syringa, etc. The aromatic heterocyclic ring is preferably pyridine, Sangen, quinone. The aromatic ring represented by Q 1 and Q 2 is preferably an aromatic hydrocarbon ring, more preferably a benzene ring. Q 1 and Q 2 It may further contain a substituent, and a substituent T described later is preferred. The substituent T is, for example, an alkyl group (preferably having 1 to 20 carbons, more preferably 1 to 12 carbons, particularly preferably 1 to 8 carbons). Examples include methyl, ethyl, isopropyl, third butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl, cyclohexyl, etc.), alkenyl (preferably 2 to 20 carbons, more preferably 2 to 12 carbons, particularly 2 to 8 carbons, for example, ethylene, allyl, 2-butenyl, 3-pentenyl, etc.), alkynyl (Preferably 2 to 20 carbons, more preferably 2 to 12 carbons, particularly preferably 2 to 8 carbons, for example, propargyl, 3-pentynyl, etc.), aryl (preferably carbon -67-200526730 6 to 30, more preferably 6 to 20 carbons, particularly 6 to 12 carbons, for example, phenyl, p-methylphenyl, naphthyl, etc.), substituted or unsubstituted amines Base (preferably carbon number 0 to 20, more preferably carbon number 0 to 10, particularly preferably carbon number 0 to 6, For example, amino, methylamino, dimethylamino, diethylamino, dipentylamino, etc.), alkoxy (preferably carbon number 1-20, more preferably carbon number 1- 12. Particularly preferred is a carbon number of 1 to 8. Examples include methoxy, ethoxy, butoxy, etc., aryloxy (preferably 6 to 20 carbons, more preferably 6 to 16 carbons, Particularly preferred is 6 to 12 carbons, and examples thereof include phenoxy, 2-naphthyloxy, etc., fluorenyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably carbons) 1 ~ 12, for example, ethylamyl, benzamyl, formamyl, trimethylethylamyl, etc.), alkoxycarbonyl (preferably 2 to 20 carbons, more preferably 2 to 2 carbons) 16. Particularly preferred is a carbon number of 2 to 12, examples of which include methoxycarbonyl, ethoxycarbonyl, etc.), aryloxycarbonyl (preferably carbon number 7 to 20, more preferably carbon number 7 to 16, Particularly preferred is a carbon number of 7 to 10, examples of which include phenoxycarbonyl, etc., fluorenyloxy (preferably a carbon number of 2 to 20, more preferably a carbon number of 2 to 16, and particularly preferred a carbon number of 2 to 10) For example, ethoxyl, benzamyloxy, etc.), fluorenylamino (preferably 2 to 20 carbons, more preferably 2 to 16 carbons, Particularly preferred is a carbon number of 2 to 10, and examples thereof include an ethylamino group, a benzylamino group, etc.), an alkoxycarbonylamino group (preferably a carbon number of 2 to 20, and more preferably a carbon number of 2) ~ 16, particularly preferred is carbon number 2 ~ 12, for example, methoxycarbonylamino group, etc.), aryloxycarbonylamino group (preferably carbon number 7-20, more preferably carbon number 7-16, special The number of carbon atoms is preferably 7 to 12. Examples include phenoxycarbonylamino groups, sulfonamide groups (preferably 1 to 20 carbon atoms, more preferably 1 to 1 carbon atoms, 6 most preferably carbon number 1). ~ 12, for example, methanesulfonamido group, benzenesulfonamido group, etc.), sulfamorano group (preferably carbon number 0-20, more preferably carbon number 0-16, particularly preferably carbon number 0) ~ 12, for example, sulfamidino, methylaminesulfonyl, dimethylaminesulfonyl, phenylaminesulfonyl, etc.), carbamoyl (more than -68-200526730, preferably carbon number 1) ~ 20, more preferably 1 to 16, carbon number, particularly preferably 1 to 12, carbon number, for example, carbamoyl, methylaminomethyl, diethylaminomethyl, phenylaminomethyl Etc.), alkylthio (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example Methylthio, ethylthio, etc.), arylthio (preferably 6 to 20 carbons, more preferably 6 to 16 carbons, particularly preferably 6 to 12 carbons, for example, phenylthio, etc.), Sulfofluorenyl (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example, methanesulfonyl, ethylsulfonyl, etc.), sulfinyl Base (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly preferably 1 to 12 carbons, for example, methanesulfinyl sulfonium, benzenesulfinyl sulfonium, etc.), urea groups (preferably 1 to 20 carbons, more preferably 1 to 16 carbons, particularly 1 to 12 carbons, examples of which include urea, methylurea, phenylurea, etc., amido phosphate (preferably carbon number) 1 to 20, more preferably 1 to 16, carbon number, particularly preferably 1 to 12, carbon number, for example, diethylphosphonate, phenylphosphonium phosphate, etc.), a hydroxyl group, a hydrogen sulfur group, a halogen atom ( For example, fluorine atom, chlorine atom, bromine atom, iodine atom), cyano group, sulfo group, carboxyl group, nitro group, oxo acid group, phosphine group, hydrazine group, imino group, heterocyclic group (preferably carbon number 1) ~ 30, more preferably 1 ~ 12, heteroatoms such as nitrogen, oxygen, sulfur, and the like Languages such as imidazolyl, pyridyl, quinolinyl, furyl, piperazyl, morpholinyl, benzoxazolyl, benzimidazolyl, benzothiazolyl, etc.), silyl (preferably carbon The number is 3 to 40, more preferably the number of carbons is 3 to 30, and particularly preferably the number of carbons is 3 to 24. Examples thereof include trimethylsilyl, triphenylsilyl, and the like. These substituents may be further substituted. When there are two or more substituents, they may be the same or different. Furthermore, they may be bonded to each other to form a ring when possible. x and χ2 represent a hydrogen atom or a substituent, and at least one of them represents a cyano group, a carbonyl group, a sulfofluorenyl group, or an aromatic heterocyclic ring. The substituents represented by \! And χ2 -69- 200526730 are applicable to the aforementioned substituent τ. Further, the substituents represented by ... and X2 may be further substituted with other substituents, and X] and X2 may be respectively condensed to form a ring structure. X1 and X2 are preferably a hydrogen atom, an alkyl group, an aryl group, a cyano group, a nitro group, a carbonyl group, a sulfonyl group, an aromatic heterocyclic ring, more preferably a cyano group, a carbonyl group, a sulfonyl group, an aromatic heterocyclic ring, and more Preferred is cyano, carbonyl, particularly preferred is cyano, alkoxycarbonyl (-C (= 0) OR (R: aryl group having 1 to 20 carbon atoms, 6 to 12 aryl groups, and combinations thereof) ). The general formula (103) is preferably a compound represented by the following general formula (103-A). General formula (1 0 3-A) [Chemical 3 5] X1 X2

Rf FT (wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are each independently a hydrogen atom or a substituent. X1 and X2 are the same as those in the general formula (20) Synonymous, and the preferred range is the same)

R1, R2, R3, R4, R5, R6, R7, r8, R9, and RU) each independently represent a hydrogen atom or a substituent, and the aforementioned substituent T is applicable to the substituent. Moreover, these substituents may be further substituted with other substituents, and the substituents may be condensed with each other to form a ring structure.

Ri, R2, R4, R5, R6, R7, R9, and R10 are preferably a hydrogen atom, -70- 200526730 alkyl, alkenyl, alkynyl, aryl, substituted ^^ s ^, substituted amino group, Alkoxy, square and radical, aryl, halogen atom, more preferably hydrogen atom, oxygen, aryloxy, halogen atom, more preferably earthen earth ... The hydrogen atom is a methyl group, preferably a hydrogen atom. Earth, R and R8 are preferably gas atoms, such as alkyl, alkenyl, alkynyl, aryl, substituted or unsubstituted amine, alkoxy, aryl " w ^ ^ ^ square tick, hydroxyl, halogen atom , More earth is a hydrogen atom, a carbon number of 1 to 2 0, an amino group of 0 to 20 carbons, an alkoxy group of 1 to 12 carbons, a carbon number of 6 to 2 aromatic ^ ^ hydroxy group, More preferably, it is an alkyl group having 1 to 12 carbon atoms of hydrogen atom, 2 to 2 carbon atoms, hydrogen atom, and particularly preferably a hydrogen atom. -The general formula (103) is more preferably a compound represented by the following general formula π %% U03-B). General formula (103-Β) [Chemical formula 3 6] NCv.X3

(In the formula, R3 and R8 are synonymous with those in the general formula (103-A), and the preferred range is also the same. X3 represents a hydrogen atom or a substituent) X3 represents a chlorine atom or a substituent Moreover, the substituent may be the aforementioned substituent T, and may be further substituted with other substituents when possible. X3 is preferably a hydrogen atom, an alkyl group, an aryl group, a cyano group, a nitro group, a mineral group, a ruthenium group, an aromatic heterocyclic ring, more preferably a cyano group, a carbonyl group, a sulfonyl group, an aromatic heterocyclic ring, and more Preferred is cyano and carbonyl, particularly preferred is cyano and alkoxycarbonyl 200526730 (-C (= 0) 0R (R: aryl group having 1 to 20 alkyl groups, 6 to 12 carbon atoms and combinations thereof) ). The general formula (103) is more preferably a compound represented by the general formula (103-〇. The general formula (103-C) [Chemical Formula 3 7] 〇

(In the formula, 'R3 and Rs are synonymous with those in the general formula (103-A), and the preferred range is also the same. R21 represents an alkyl group having 1 to 20 carbon atoms.] R21 is preferably R3 and two In the case of hydrogen, the alkyl group having 2 to 12 carbon atoms is preferably an alkyl group having 4 to 12 carbon atoms, more preferably an alkyl group having 6 to 12 carbon atoms, particularly preferably n-octyl group and third octyl group. , 2-ethylhexyl, n-decyl, n-dodecyl, most preferably 2-ethylhexyl. R21 is preferably a case where R3 and R8 are other than hydrogen. The compound represented by the general formula (103 to q has a molecular weight of 300 or more and an alkyl group with a carbon number of 20 or less is preferred. The general formula of the present invention The compound represented by (103) can be synthesized according to the method described in Jounal of American Chemical Society 63 Vol. 3452 (1941). The following are specific examples of the compound represented by general formula (10 3). Limited by the following specific examples: -72-200526730 [Chemized UV-201 UV-202 UV-203 UV-204 UV-205 3 8]

O

-73-200526730

UV-213 Ο

UV-218 UV-219 UV-214

UV-220

-74- 200526730 【Chemical 40 UV-221

CN

UV-226

UV-227

UV-222 NC, / CN

IJV-223 UV-228

NC < / CN

UV-224 UV-225

UV-231 Ph CN NC Ph

Ov--s〇i: o = v <:

Ph CN NC Ph When the cellulose acetate film has a multi-layer structure, the types or amounts of additives in each layer may be different (for example, described in Japanese Patent Application Laid-Open Nos. 001- 1 5 1 920). -75-200526730 Additives for cellulose acetate films are also described in Japanese Technical Bulletin 200 1-1 745 (issued March 15, 2001, Association of Inventions), pages 16 to 22. [Production of cellulose acetate film] The solvent of the cellulose acetate solution is preferably an organic solvent. The organic solvent is preferably a halogenated hydrocarbon. Halogenated hydrocarbons are preferably chlorinated hydrocarbons, dichloromethanes and chloroform are more preferred, and dichloromethanes are most preferred. Organic solvents other than halogenated hydrocarbons can also be used. Organic solvents other than halogenated hydrocarbons include esters, ketones, ethers, alcohols, and hydrocarbons. The carbon number of the organic solvent is preferably from 1 to 12. Ester, ketone, ether, alcohol, and hydrocarbon may have a branched structure or a cyclic structure. Compounds having any two or more of the functional groups of esters, ketones, ethers, and alcohols (ie, -0-, -CCK, -COO-, -OH) can also be used as solvents. Hydrogen atoms in the hydrocarbon portion of esters, ketones, ethers, and alcohols may be replaced with halogen atoms (especially gas atoms). Examples of the ester having 2 to 12 carbon atoms include methyl formate, ethyl formate, propyl formate, butyl formate, methyl acetate, ethyl acetate, and pentyl acetate. Examples of the ketone having 3 to 12 carbon atoms include acetone, methyl ethyl ketone, diethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methyl cyclohexanone. Examples of ethers having 3 to 12 carbon atoms include diisopropyl ether, dimethoxymethane, dimethoxyethyl, 1,4-diB, and 1,3-dioxolane. , Tetranitrofuran, anisole, phenyl ether. Examples of alcohols having 1 to 12 carbon atoms include methanol, ethanol, k-propanol, 2-propanol, 1-butanol, 2-butanol, third butanol, pentyl alcohol, and 2-methyl- 2-butanol, cyclohexanol, 2-perfluoroethanol, 2,2,2-trifluoroethanol, 2,2,3,3_ -76-200526730 tetrafluoro-1 -propanol. Examples of organic solvents having two or more types of functional groups include ethyl 2-ethoxyacetate, 2-methoxyethanol, 2-butoxyethanol, and methyl ethyl acetate. Examples of the hydrocarbon having 6 to 12 carbon atoms include cyclohexane, hexane, benzene, toluene, and xylene. Particularly preferred organic solvents are dichloromethane, methyl formate, ethyl formate, methyl acetate, acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, methanol, ethanol, 1-propanol, 2-propane Alcohol, 1-butanol, 2-butanol, cyclohexanol, methyl ethyl methyl ethyl acetate, hexane, cyclohexane. Halogenated hydrocarbons can be used with other organic solvents. When halogenated hydrocarbons and other organic solvents are used, the proportion of halogenated hydrocarbons is preferably 50% by mass or more. It is particularly preferred to use dichloromethane and other organic solvents. Organic solvents other than halogenated hydrocarbons may be used in plural. Particularly preferred mixed solvents are three or more different mixed solvents. The first solvent is selected from the group consisting of esters (for example, methyl acetate, ethyl acetate, methyl formate, ethyl formate), acetone, and ether (for example, Dioxolane, dioxane), the second solvent is selected from the group consisting of ketones having 4 to 7 carbon atoms (including ethyl acetate), and the third solvent is selected from the group having carbon atoms i 〇 Alcohols or hydrocarbons. The third solvent is preferably an alcohol having from 8 to 8 carbon atoms. When the first solvent is a mixture of two or more solvents, the second solvent may not be required. The first solvent is preferably selected from methyl acetate, acetone, methyl formate and ethyl formate. The second cereal is preferably based on methyl ethyl ester, pentylone, cyclohexanone, methyl ethyl acetate, or the like. Examples of the alcohol in the third solvent are the same as those described above. -77- 200526730 The hydrocarbon of the third solvent may have a ring structure or a branched structure. The hydrocarbon system includes Fangxiangyuan and hydrocarbons. The aliphatic hydrocarbon may be unsaturated. Examples of hydrocarbons include cyclohexylamine, almond, benzene, toluene, and xylene. The third solvent is preferably selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, cyclohexanol, cyclohexane, and hexane. Methanol, ethanol, propanol, 2-propanol, and 1-butanol are more preferred. The three types of mixed solvents preferably include a ratio of 20 to 95% by mass of the first solvent, 2 to 60% by mass of the second solvent, and 2 to 30% by mass of the third solvent. The first solvent contains 30 to 90% by mass, the second solvent contains 3 to 50% by mass, and the third solvent contains 3 to 25% by mass of the alcohol. The first solvent is preferably 30 to 90% by mass, the second solvent is 3 to 30% by mass, and the third solvent is preferably 3 to 15% by mass of the alcohol. When the first solvent is a mixed solution in which the second solvent is not used, it is preferable that the ratio of the first solvent is 20 to 90% by mass and the third solvent is 5 to 30% by mass. The first solvent including the mixed solution is 30 to 86% by mass, and the third solvent is more preferably 7 to 25% by mass. Non-chlorine-based organic solvents are described in the Public Technical Bulletin of the Invention Association (public technical number 2001-1745, issued on March 15, 2001, Association of Inventions) Nos. 12-16. Examples of combinations of organic solvents are as follows. The ratios are in parts by mass. (1) Dichloromethane / methanol / ethanol / butanol = 80/1 0/5/5 (2) Dichloromethane / acetone / methanol / propanol = 80/10/5/5 (3) Dichloromethane / Methanol / butanol / cyclohexane = 75/10/5/5/5 (4) Dichloromethane / methyl ethyl ketone / methanol / butanol = 80/10/5/5 (5) Dichloromethane / Acetone / methyl ethyl ketone / ethanol / isopropanol-78- 200526730 = 68/10/10/5/7 (6) Dichloromethane / cyclopentanone / methanol / isopropanol = 77/10/5 / 8 (7) dichloromethane / methyl acetate / butanol = 80/10/10 (8) dichloromethane / cyclohexanone / methanol / hexane = 70/20/5/5 (9) dichloromethane / Methyl ethyl ketone / acetone / methanol / ethanol = 5 0/20/20/5/5 (10) dichloromethane / 1,3-dioxolane / methanol / ethanol = 70/20/5/5 (11) Dichloromethane / dioxane / acetone / methanol / ethanol = 60/20/10/5/5 (12) Dichloromethane / acetone / cyclopentanone / ethanol / isobutanol / cyclohexane = 65 / 10/10/5/5/5 (13) Dichloromethane / methyl ethyl ketone / acetone / methanol / ethanol = 70/10/10/5/5 (14) Dichloromethane / acetone / ethyl acetate / Ethanol / butanol / hexane = 65/10/10/5/5/5 (15) methylene chloride / methyl ethyl acetate / methanol / ethanol = 65/20/1 0/5 (16) two Chloromethane / cyclopentanone / ethanol / butanol = 65/20/1 0/5 modulation Concentration of the cellulose acetate-based solution to 1 billion to 30 mass% as good, 13 to 27% by mass more preferably, 15 to 25 mass% for the best. Cellulose acetate is dissolved in a solvent and adjusted to a predetermined concentration in steps. After preparing a solution with a low concentration (for example, 9 to 14% by mass), it can be concentrated. Furthermore, the solution can be diluted after preparing a solution having a high concentration. By adding additives, the concentration of cellulose acetate can also be reduced. The cellulose acetate solution (dope) is preferably prepared by a cooling dissolution method, a high temperature dissolution method, or a combination thereof. A method for preparing a cellulose acetate solution is described in JP-A-Sho 5 8-1 2 7 7 3 7, same as 6 1-1 0 6 6 2 8 -79-200526730, JP-A 2-2 7 6 8 3 0, the same as 4_2 5 95 1 1, the same as 5- 1 63 3 0 1, the same as 9-95544, the same as 10-45950, the same as 10-95854, the same as 11-7 1463, and the same as 11- Gazettes No. 302388, No. 11-322946, No. 11-322947, No. 11-323017, JP 2000.53784, No. 2000-273184, and No. 2000-273239. A method for preparing a cellulose acetate solution is also described in Japanese Patent Publication No. 20 0 1-1745 (issued on March 15, 2001, Association of Inventions), page 25. In addition, when the heating temperature in the high-temperature dissolution method is above the boiling point of the organic solvent used, heating is performed under pressure. In the step of cooling the mixture of cellulose acetate and the solvent, the cooling temperature is not particularly limited, and is preferably -100 ° C to -10 ° C, and -10 ° C to -30 ° C. More preferably, -100 ° C to -5 (TC is particularly preferred. The cellulose acetate solution is preferably 40 to 40 ° C with a viscosity of 1 to 400 P a · s, and more preferably 10 to 200 Pa · s. The cellulose acetate solution preferably has a dynamic storage elasticity at 15 ° C of 100 Pa or more, and more preferably 500 to 1 million Pa. Moreover, the dynamic storage elasticity at a low temperature is better to a large extent. For example, casting When the temperature of the support of the glue is _5, it is better to have a dynamic storage elasticity of 10,000 to 1 million Pa at -5 ° C. When the temperature of the support is -50 ° C, at -50 ° C The dynamic storage elasticity ratio is preferably 10,000 to 5 million Pa. The viscosity and dynamic storage elasticity ratio are obtained by filling 1 mL of the sample solution into a container with a diameter of 4cm / 2 ° (Steel Cone, TA Instruments), The measurement was performed using a rheometer (CLS500, manufactured by TA Instruments). Measurement conditions

The measurement was performed using a device (Oscillation Step / Temperature Ramp) in a range of 40 ° C to -10 ° C at 2 ° c / min. Based on this, the static non-Newtonian viscosity (n * (p a · s)) and storage elasticity (G '(Pa)) of -50 ° C at 200526730 0 ° C have been obtained. In addition, the sample solution was kept at a predetermined liquid temperature to a predetermined liquid temperature, and then the measurement was started. The cellulose acetate film can be produced according to a conventional solution casting film forming method and a conventional solution casting film forming apparatus. The dope (cellulose acetate solution) prepared by the dissolver (cauldron) is temporarily stored in a storage kettle, and the foam contained in the dope is defoamed as a final preparation. The glue is pumped from the glue discharge port, for example, by a pressurized fixed-quantity gear with a high-precision quantitative liquid delivery according to the number of revolutions, and pumped to the pressurized die head. The glue is continuously connected to the lid (gap) of the pressurized die head. Di Xingjun's casting part is uniformly cast on the metal support. The metal support system uses a peeling point of about one week to peel the dried glue film (also known as the substrate) from the metal support. Both ends of the obtained base material were clamped by clamps, conveyed and dried by a tenter while maintaining the width, and then conveyed by a roller group of a drying device to finish drying, and the coiler was wound into a predetermined length. The combination of the tenter and the drying device of the roller group may vary depending on the purpose. Generally, a cellulose acetate film used as a support for a silver halide photographic photosensitive material or a functional protective film for an image display device is generally provided with a base layer, an antistatic layer, a halo prevention layer, or a protective layer. In order to provide each layer, in addition to the solution casting film forming apparatus, a coating apparatus is often used in the solution casting film forming apparatus. The metal support used in each manufacturing step of the solution casting film (casting (including co-casting), drying, peeling, and stretching) is described in Published Technical Bulletin No. 2001-1 745 (200 1 year 3 Issued on the 15th, Invention Association) Pages 25 ~ 30.

The space temperature in solution casting is preferably -50 ° C to 50 ° C, and -30 ° C 200526730 to 40 ° C is more preferred '-20 ° c to 3 trc is the best. The cellulose acetate solution cast at a low space temperature is instantaneously cooled on the support, so that the gel strength is improved. Thereby, a thin film with a large amount of residual organic solvents was obtained. Therefore, the organic solvent does not evaporate from the cellulose acetate, and the film can be peeled from the support in a short time. As the gas for cooling the space, ordinary air, nitrogen, argon, or helium can be used. The relative humidity is preferably 0 to 70%, and more preferably 0 to 50%. The temperature of the support (casting part) for casting cellulose acetate solution is preferably -50 ° C to 130 ° C, more preferably -30 ° C to 25 ° C, and -20 ° C to 15t: For the best. In order to cool the casting section, a cooled gas may be introduced into the casting section. The cooling device may be disposed in the casting portion to cool the space. In cooling, it is important to note that no water can adhere to the casting part. When cooling with gas, a dry gas system is desirable. The cellulose acetate solution may contain various liquid or solid additives. Examples of the additives include plasticizers (preferably the amount of addition is 0.1 to 20% by mass relative to cellulose acetate, the same applies hereinafter), modifiers (0.1 to 20% by mass), ultraviolet absorbers (0.001 to 5% by mass) %), Fine particles with an average particle diameter of 5 to 3,000 nm (0.001 to 5 mass%), fluorine-based surfactants (0.001 to 2 mass%), release agents (0.000 1 to 2 mass%), deterioration preventing agents (0.000 1 to 2% by mass), an optical anisotropy control agent (0.1 to 15% by mass), and an infrared absorber (0.1 to 5% by mass). In addition, in the present invention, a hysteresis modifier can be used in order to obtain an arbitrary hysteresis. The retardation modifier is not particularly limited as long as it is a variable retarder, and it is preferable to use a phosphate ester system, a triple well system, an aliphatic ester system, or a sulfonamide system. A molecular weight of 100 or more is preferably used. In the casting step, two or more cellulose acetate solutions may be co-casted simultaneously or successively. Two or more cellulose acetate solutions may have exactly the same composition. When the composition is different, the type of solvent or additive can be changed depending on the solution. The concentration of two or more solutions can be different. Two or more kinds of solutions may have different molecular weights of the aggregates of cellulose acetate. Two or more solutions may have different temperatures. The coating amount, viscosity, film thickness after drying, distribution of constituent components, physical properties, or physical property distribution of two or more kinds of solutions or formed layers may be different. About the physical properties of cellulose acetate film (haze, transmittance, spectral characteristics, re hysteresis, Rth hysteresis, molecular alignment axis, axis deviation, cracking strength, flexural strength, tensile strength, poor Rth inside and outside curl, raw persimmon paint, Dynamic friction, alkaline hydrolysis, curling, moisture content, residual solvent content, thermal shrinkage, high humidity size evaluation, moisture permeability, flatness of the substrate, dimensional stability, thermal shrinkage onset temperature, elasticity, bright point foreign matter, Impedance, planarity, yellowness index, transparency, Tg, heat of crystallization) are described in Public Technical Bulletin 200 1-1 745 (issued on March 15, 2001, Association of Inventions), pages 6 to 7 and the same 2001-1745 (issued March 15, 2001, Association of Inventions) p. 11. Surface treatment can be performed on cellulose acetate film. The surface treatment is generally performed in order to improve the adhesion of the cellulose acetate film to various functional layers (such as an undercoat layer and a backing layer). The surface treatment system includes a glow discharge treatment, an ultraviolet irradiation treatment, a corona treatment, a flame treatment, and a saponification treatment (acid saponification treatment, alkali saponification treatment). Among them, glow discharge treatment and alkali saponification treatment are preferred. The glow discharge treatment system includes a low-temperature plasma treatment performed under a low-pressure gas of 1 (Γ3 to 20 Torr. In addition, even if the plasma treatment is at atmospheric pressure, a glow discharge treatment is preferred. Plasma excitation gas system is used Argon, helium, neon, krypton, xenon, nitrogen, carbon dioxide, Freon (e.g., tetrafluoromethane) and mixtures of these -83-200526730. Plasma treatment at atmospheric pressure is preferably between 10 and 100. 〇κ e V, more preferably from 30 to 500 Kev. The irradiation energy is preferably from 20 to 500 Kgy, and more preferably from 20 to 3 OOKgy. The glow discharge treatment system is described in Public Technical Paper No. 200 1745 (2001 Issued on March 15, Association of Inventions) Pages 30 to 32. Alkali saponification is performed by applying a saponification solution to a film, or by dipping the film in a saponification solution. The coating method can be a dip coating method or a curtain coating method. , Extrusion coating method, bar coating method, or E-type coating method. The solvent of the coating solution is expected to have good wettability to the film, and a surface shape that does not form irregularities on the surface of the film. The agent is preferably an alcohol. Especially good. Also, water (preferably an aqueous solution of a surfactant) can also be used as a solvent. The alkali type is preferably an alkali metal hydroxide, and KOH and NaOH are more preferred. 0 or more is preferable, and 12 or more is more preferable. The reaction conditions at the time of alkali saponification are preferably 1 second or more and 5 minutes or less, more preferably 5 seconds or more and 5 minutes or less, and 20 seconds or more and 3 minutes or less. The best. It is better to wash the surface of the saponified solution after alkaline reaction or wash with acid. To improve the adhesion between the film and the functional layer, surface treatment can be added, or an undercoat layer (adhesive layer) can be provided instead of the surface treatment. ). The undercoating is described in Public Technical Bulletin Nos. 2001-1 7 4 5 (issued on March 15, 2001, Japan Association of Inventions) page 32. Functions provided in cellulose acetate film The property layer is described in Public Technical Bulletin No. 2001-1745 (issued on March 15, 2001, Association of Inventions), pages 32 to 45. Cellulose acetate film with high retardation in the thickness direction, Or, the retardation plate of -84- 200526730 multiple laminated layers, or the hysteresis of its thickness direction is negative The cellulose acetate film laminated phase retardation plate can be used as an optical compensation sheet (including its support) or a polarizing plate protective film. The above cellulose acetate film and retardation plate can be used as optical compensation sheets in this way. The above-mentioned cellulose acetate film and retardation plate as a support can also be provided thereon with an optically anisotropic layer (such as a layer formed by liquid crystal molecules) to manufacture an optical compensation sheet. A polarizing plate is composed of a polarizing film and It consists of two polarizing plate protective films that protect both sides. At least one of the cellulose acetate film or retardation film can be used as a φ polarizing plate protective film. When used as a polarizing plate protective film, the cellulose acetate film is desirably subjected to an alkali saponification treatment. When using a polarizing film in which a polyvinyl alcohol film is dipped in an iodine solution, an alkali-saponified surface of a cellulose acetate film can be bonded to both sides of the polarizing film with an adhesive. As the adhesive, an aqueous solution of polyvinyl alcohol or polyvinyl acetate (for example, polyvinyl butyral) or a latex of a vinyl polymer (for example, polybutyl acrylate) can be used. A particularly preferred adhesive is an aqueous solution of fully saponified polyvinyl alcohol. φ It is possible to perform surface treatment other than alkali saponification (described in JP 6-94915 and the same publications as 6-118232). After the polarizing plate is manufactured and before use, an external protective film can be attached to one side of the polarizing plate and a separation film can be attached to the opposite surface. The external protective film and the separation film are used for the purpose of protecting the polarizing plate during shipment of the polarizing plate or product inspection. The external protective film is used by bonding a polarizing plate to an opposite surface side of a surface of a liquid crystal cell. The separation film is used for the purpose of protecting the polarizing plate and the adhesive layer of the liquid crystal cell. A general liquid crystal display device is provided with a liquid crystal cell between two -85-200526730 polarizing plates, and a general liquid crystal cell is injected with liquid crystal between two substrates. Therefore, a typical liquid crystal display device has four polarizing plate protective films. According to the cellulose acetate film of the present invention, any of four polarizing plate protective films can be used. However, it is particularly preferable to use a plastic film disposed between a polarizer and a liquid crystal layer in a liquid crystal display device. [Liquid crystal display device] When the cellulose acetate film is used as an optical compensation film, the retardation axis of the optical compensation film composed of the polarization axis of the polarizing element and the cellulose acetate film can be arranged at any angle. A liquid crystal display device has a liquid crystal cell formed by carrying liquid crystal between two electrode substrates, two polarizing elements disposed on both sides thereof, and at least one optical compensation disposed between the liquid crystal cell and the polarizing element. The composition of the film. The liquid crystal layer of a liquid crystal cell is usually formed by inserting a spacer in a space formed by two substrates, and sealing the liquid crystal. The transparent electrode layer is formed on a substrate containing a transparent film of a conductive substance. The liquid crystal cell may further be provided with a gas barrier layer, a hard coat layer, or (for adhering a transparent electrode layer) a primer layer (undercoat layer). These layers are usually provided on a substrate. The liquid crystal cell substrate generally has a thickness of 50 / im to 2 mm. (Types of liquid crystal display device) The cellulose acetate film according to the present invention, and the retardation plate, optical compensation sheet, and polarizing plate using the cellulose acetate film can be used in liquid crystal display devices of various display modes. Display modes include TN (Twisted Nematic), IPS (In-Plane Switching), FLC (Ferroelectric Liquid Crystal), AFLC (Ferroelectric Liquid Crystal Resistant, Anti-ferroelectric Liquid Crystal), 0CB (Optically Compensatory Bend), STN (Super Twisted Nematic), VA (Vertically Aligned), ECB (electrically controlled birefringence) , Electrically Controlled Birefringence), and HAN (Hybrid Aligned Nematic), ASM (Axially Symmetric Aligned Microcell). The above-mentioned display modes also include an alignment ratio display mode. The liquid crystal display device may be any of a transmissive type, a reflective type, and a transflective type. (TN type liquid crystal display device) The cellulose acetate film of the present invention can be used as an optical compensation sheet support for a TN type liquid crystal display device having a TN mode liquid crystal cell. Regarding the TN mode liquid crystal cell and the TN type liquid crystal display device, they have been known since ancient times. Optical compensation sheets used in TN-type liquid crystal display devices are described in various publications such as JP-A-Hei 3-93 2 5, JP-A Hei 6- 1 48429, JP-A Hei 8- 5 0206, and JP-A Hei 9-26572. . Also, in other papers by Mori (Jpn. J. Appl. Phys. Vol. 36 (1 9 7) p. 143 or Jpn. J. Appl. Phys. Vol. 36 (1 997) p. 1 06 8 pages). (STN type liquid crystal display device) The cellulose acetate film of the present invention can be used as an optical compensation sheet support for an S TN type liquid crystal display device having a STN mode liquid crystal cell. In general STN type liquid crystal display devices, the rod-shaped liquid crystal molecules in the liquid crystal cell are bent in a range of 90 to 60 degrees. The refractive index anisotropy (Δη) of the rod-shaped liquid crystal molecules and the cell gap ( The product of d) (And) is in the range of 3 00 to 1 500 nm. The optical compensation sheet used in the S TN type liquid crystal display device is described in Japanese Patent Application No. 200526730, 2000-1 05 3 16. (VA-type liquid crystal display device) The cellulose acetate film of the present invention is particularly useful as an optical compensation sheet support system for a VA-type liquid crystal display device having a VA-mode liquid crystal cell. It is preferable that the Re hysteresis of the optical compensation sheet used for the VA type liquid crystal display device is 0 to 150 nm and the Rth hysteresis is 70 to 400 nm. In the case of hysteresis, it is more preferably 20 to 70 nm. When the VA-type liquid crystal display device uses two optically anisotropic polymer films, the Rth retardation of the film is preferably 70 to 25 Onm. When an optically anisotropic polymer film is used in a VA-type liquid crystal display device, the Rth retardation ratio of the film is preferably 15 to 400 nm. The V A type liquid crystal display device is, for example, JP-A! 〇 _ 丨 2 3 5 7 6 does not matter. (IPS-type liquid crystal display device and ECB-type liquid crystal display device) The cellulose acetate film of the present invention is used as an optical compensation sheet for an IPS-type liquid crystal display device and an ECB-type liquid crystal display device having an IP S mode and ECB mode liquid crystal cell A support or a protective film of a polarizing plate is also particularly advantageous. These modes are in a state where the liquid crystal material is slightly parallel aligned when displaying in black | like 'in a state where no voltage is applied, the liquid crystal molecules are aligned in parallel with respect to the substrate surface and displaying in black. The polarizing plate used in the cellulose acetate film of the present invention in these aspects contributes to improvement of color and taste, enlargement of viewing angle, and improvement of control. In this aspect, among the protective films on the upper and lower polarizers of the liquid crystal cell, the protective film (the protective film on the cell side) disposed between the liquid crystal cell and the polarizer uses at least one side of the acetic acid of the present invention The polarizing plate used for a cellulose film is preferable. More preferably, the hysteresis of the optically anisotropic layer disposed with the optically anisotropic layer disposed between the protective film of the polarizing plate and the liquid crystal cell is set to be less than twice the Δη · d of the liquid crystal-88- 200526730 layer. Better. (OCB type liquid crystal display device and HAN type liquid crystal display device) The cellulose acetate film of the present invention is used as an OCB type liquid crystal display device having a 0 CB mode liquid crystal cell or a HAN type liquid crystal display device having a HAN mode liquid crystal cell. An optical compensation sheet support is also advantageous. For an optical compensation sheet used in an OCB-type liquid crystal display device or a HAN-type liquid crystal display device, it is preferable that the direction in which the absolute hysteresis is minimized does not exist in the plane of the optical compensation sheet or in the normal direction. 0 The optical properties of the optical compensation sheet used in the CB type liquid crystal display device or the HAN type liquid crystal display device are also based on the optical properties of the optically anisotropic layer, the optical properties of the support, and the configuration of the optically anisotropic layer and the support. Decide. The optical compensation sheet used in the C B type liquid crystal display device or the HAN type liquid crystal display device is described in Japanese Patent Application Laid-Open No. 9- 1 9 73 97. It is also described in other papers by Mori (Jpn · J · Appl. Phys. Vol. 38 (1999) p. 2837). (Reflective Liquid Crystal Display Device) The cellulose acetate film of the present invention is also useful as an optical compensation sheet for reflective liquid crystal display devices of the TN type, STN type, HAN type, and GH (Guest-Host) type. These display modes have been known to be good since ancient times. TN-type reflective liquid crystal display devices are described in various publications of JP-A-Hei 10-1,2 3 47 8; WO 9 84 8 320; and Patent No. 3022477. An optical compensation sheet used in a reflective liquid crystal display device is described in WOOO-65384. (Other liquid crystal display devices) The cellulose acetate film of the present invention is used as a liquid crystal cell having an ASM (axial 200526730 symmetrically aligned microcell, Axia 11 y Symme 11.ic A 1 igned M icroce 11) mode. The optical compensation sheet support of the ASM type liquid crystal display device is also advantageous. The liquid crystal cell system of the ASM mode has a characteristic that the thickness of the cell is maintained by a position-adjustable resin spacer. Other properties are the same as those of the TN mode liquid crystal cell. The liquid crystal cell of the ASM mode and the ASM type liquid crystal display device are described in other papers of Kume (Kume et al., SID 98 Digest 1 0 8 (1 99 8)). (Hard-coated film, anti-glare film, anti-reflective film) The cellulose acetate film of the present invention is preferably applicable to hard-coated film, anti-glare film, and anti-reflective film. The purpose is to improve the visibility of flat panel displays such as LCDs, PDPs, CRTs, and ELs. On the one or both sides of the cellulose acetate film of the present invention, a hard coat layer, an anti-glare layer, or an anti-reflection layer can be provided. . The desired implementation of such anti-glare films as anti-reflective films is described in the Public Technical Bulletin of the Invention Association (public technical number 2001-1745, issued on March 15, 2001, Association of Inventions), pages 5 4 to 5 7 It is described in detail that the cellulose acetate film of the present invention can be preferably used. [Embodiment] [Example] [Example 1] (Preparation of cellulose acetate solution) A cellulose acetate powder having a degree of substitution of 2. 8 7 was used. Cellulose acetate has a viscosity average polymerization degree of 280, 6-position tritiated substitution degree of 0.92, acetone extraction is divided into 7% by mass, mass average molecular weight / number average molecular weight ratio is 2.3, and glass transition temperature (1 ^) is 160 ° C. Moisture content is 0.2% by mass, the viscosity of the 6% by mass solution of dichloromethane is 3 05 mPa · s, the amount of residual acetic acid is 0.1200526730% by mass or less, the Ca content is 65ppm, the Mg content is 26ppm, and the iron content is 0.8 ppm, sulfate ion content was 18 ppm, yellow index was 1.9, and free acetic acid amount was 47 ppm. The average particle diameter of the powder was 1.5 mm, and the standard deviation of the particle diameter was 0.5 mm. In a 400 liter stainless steel dissolving storage tank having a stirring blade and a cooling water cycle, 80.0 parts by mass of methylene chloride (main solvent), 10.0 parts by mass of methanol (second solvent), and butanol (third solvent) were charged. ) 5.0 parts by mass. The water content of each solvent is 0.2% by mass or less. While stirring the mixed solvent, 20 parts by mass of the cellulose acetate powder was slowly added, and the whole amount was 200 kg. After the cellulose acetate powder was put into the dispersion storage tank, the pressure in the storage tank was reduced to 1,300 Pa. The stirring system uses an eccentric stirring shaft of a high-speed disperser type stirring at a peripheral speed of 15m / sec (shearing stress 5xl04kgf / m / sec2), and an anchor wing on the central axis at a peripheral speed lm / sec (shearing stress lxl04kgf) / m / SeC2) The stirring shaft was stirred for 30 minutes. The initial temperature of the stirring is 2 51. The cooling water is stirred while flowing, and the final temperature is 3 5 ° C. After that, the high-speed stirring shaft, the stirring shaft with an anchor wing was stopped at a peripheral speed of 0.5 m / sec, and then stirred for 100 minutes to swell the cellulose acetate powder (small flakes). At the end of the swelling, the storage tank was pressurized with nitrogen to 0.12 MPa. For explosion protection, the oxygen concentration in the tank is below 2 v ο 1%. The water content in the dope was confirmed to be 0.2% by mass or less. The obtained non-uniform gel-like substance was cooled by a screw pump heated at 30 ° C to the center of the shaft, and cooled by a spiral outer portion at -75 ° C for 3 minutes. The cooling system is implemented using a refrigerant cooled at 80 ° C by a freezer. The solution obtained after cooling was heated to 35 ° C in the liquid delivery by a screw pump, and transferred to a stainless steel container. After being stirred at 50 ° C for 2 hours to obtain a homogeneous solution of 200526730, it was filtered with a filter paper (# 63, manufactured by Toyo filter paper (strand)) with an absolute filtration accuracy of 0.01 mm, and then with an absolute filter accuracy of 2.5 μm (F Η 0 2 5. P au 1). The obtained cellulose acetate solution was heated and pressurized at 110 ° C and 1 MPa in a heating and pressurizing part of a liquid feeding tube, and was released at normal pressure (approximately 0.1 Mpa). The organic solvent was cooled while volatilizing to obtain a temperature of 40. A solution of ° C and a cellulose acetate concentration of 24.0% by mass. The viscosity of the solution (40 ° C) is 120Pa · s, the dynamic storage elasticity (15 ° C) is 3 800 Pa, the dynamic storage elasticity (-5 ° C) is 35,000 Pa, and the dynamic storage elasticity (-5 (TC) is 240,000 Pa. Moreover, the degree of polymerization of the aggregate is 2.8 million to 3200,000. (Production of cellulose acetate film) The filtered cellulose acetate solution at 50 ° C is passed through a casting machine (such as Japanese Patent Application Laid-Open No. 1 1 -3 1 423 3) is cast on a mirror stainless steel support with a diameter of 3 m. The temperature of the support is set at -5 ° C. The casting speed is 75 m / min and the coating width is 200cm. The space temperature of the entire casting part is set to 15 ° C. Then, the cellulose acetate film cast from the casting part 5 Ocm before the peeling is peeled off the roller, and both ends are pinned with a pin tenter. Squeeze. The cellulose acetate film held by the pin tenter is transported to the drying area. The initial drying system sends 4 5 t of drying air. Then it is 1 1 0. (: 5 minutes, then 1 4 5 ° C (film temperature is about 140 ° C), dried for 10 minutes to obtain a cellulose acetate film with a film thickness of 80 / xm. The obtained sample was cut at 3 cm. Then, a knurling of 100 / xm was performed from the part with a height of 2 to 10 mm, and then rolled into a roll shape. The thickness retardation (Rth) of the cellulose acetate film was measured by the aforementioned method. The film surface shape was borrowed It was visually confirmed and evaluated in the following four-step step-92-200526730. A: No horizontal spots or particles were seen on the film. B: Horizontal spots or particles were gradually seen on the film. C: Film There are unevenness on the surface, and the bleeding of the component is also seen. D: The unevenness on the surface of the film is obvious, and the bleeding of the component is also significant, which is not suitable for the user of the optical film. The results are shown in Table 1. Acetate fibers After the moisture-free film was conditioned at 25 ° C and 50% RH for 24 hours, the density was measured in a density-hook pipe of Zheng Gengyuan / Carbon Tetrachloride system. The density was 25. The results are shown in Table 1. (Saponification of cellulose acetate film) 20 parts by mass of water was added to 80 parts by mass of isopropanol, and potassium hydroxide as specified in 1.5 was dissolved therein. The resulting solution was tempered at 60 ° C as an emperor Use a saponified solution on a cellulose acetate film at 60 ° C at 10g / m2, Saponification in 1 minute. After that, dry warm water at 50 ° C with a sprayer for 1 minute 10 L / (m2 · min) until washed. (Production of polarizing plate) Average degree of polymerization 4 0 0 0, degree of saponification 9 9.8% of polyvinyl alcohol was dissolved in water to obtain a 4.0% by mass aqueous solution. The aqueous solution was subjected to tape casting drying using a drawn die to extend the width of 11 mm before the film, the left end of the film thickness was 120 μm, and the right end. It is 135 / xm. The obtained film was peeled from the tape, and was stretched obliquely from the 45-degree direction in a dry state. Then, it was immersed in an aqueous solution of 0.5 g / L of iodine and 50 g / L of potassium iodide at 30 ° C for 1 minute, and then immersed in a solution of 100 g / L of boric acid and 60 g / L of potassium iodide in 200526730 at 70 ° C for 5 minutes. minute. Furthermore, it was put into a water-washing tank and washed with water at 2 ° C for 10 seconds, and then dried at 80 ° C for 5 minutes to produce a polarizing film. The polarizing film was 660 mm wide and about 20 / xm thick. Polarizing film and warp The saponified cellulose acetate film was bonded using a 3% by mass aqueous solution of polyvinyl alcohol (PVA-11 7H, made by Clary) as an adhesive, and then heated at 60 ° C for 30 minutes. The manufactured polarizing plate is used for the IP S-type liquid crystal display device described in JP 1 1-3 0 5 2 1 7 described in Example 1 to determine whether there are visual obstacles. Visibility is evaluated in the following four steps: A: Even when the viewing angle is increased and the display device is seen obliquely, the white and black image does not reverse, or the tone or color of the displayed image is very high, and the contrast is very high. The visibility is very excellent. B: Even when the viewing angle is increased and the display device is seen obliquely, the inversion of white and black portraits, or the tone or coloring of the displayed images are generally not occurred. Excellent performance C: Increased viewing angle and obliqueness In the case of the display device, it is found that the reverse of the white and black image, or the occurrence of the tone or coloration of the displayed image, the contrast is low, and the visibility is poor. D: When the viewing angle is increased and the display device is seen obliquely, it is found Significant reversal of white and black images, or the occurrence of tone or coloring of displayed images, with low contrast, are extremely poor in visibility. The results are shown in Table 1. [Example 2] With stirring wings, the periphery In a 400 liter stainless steel dissolving storage tank for cooling water circulation, 80.0 parts by mass of methylene chloride (main solvent), 10.0 parts by mass of methanol (200526730 a " 2 solvent), 5.0 parts by mass of butanol (third solvent), Trimethylol: 1.6 parts by mass of propane acetate 2,4-dicaprylate (plasticizer A), 2,6-di-third-butyl-4-cresol (deterioration preventive agent A), 2 , 4-Bis- (n-octylthio) -6- (4-hydroxy · 3, 5-di-third-butylaniline) -1,3,5-tritrap (ultraviolet absorber A) 0.2 mass Parts, 2- (2'-hydroxy-3 ', 5'-di-third-butylphenyl) -5-chlorobenzotriazole (ultraviolet absorbent B) 0.2 parts by mass, 2- (2' -Hydroxy-3 ', 5 '-Di-tertiary pentylphenyl) -5-chlorobenzotriazole (ultraviolet absorbent C) 0.2 parts by mass, 20 nm silicon dioxide fine particles (Mohs hardness about 7) 0.05 parts by mass, citric acid Ethyl ester (mixing ratio of monoester and diester = 1: 1) 0.04 parts by mass. Φ In addition, the water content of each solvent is 0.2% by mass or less. The mixed solvent was slowly added to Example 1 while stirring. 20 parts by mass of the cellulose acetate powder used was fed to an entire weight of 200 kg. Thereafter, a cellulose acetate film was produced in the same manner as in Example 1 and evaluated. The results are as shown in Table 1. [Example 3] Except changing 2,4 parts by mass of trimethylolpropane acetate 2,4-dicaprylate (plasticizer φ A) to trimethylolpropane diacetate caprylate ( Plasticizer B) Except for 2.4 parts by mass, a cellulose acetate film was produced and evaluated in the same manner as in Example 2. The results are shown in Table 1. [Example 4] A cellulose acetate film was produced in the same manner as in Example 1 except that cellulose acetate was cellulose acetate having a substitution degree of 2.87, a viscosity average polymerization degree of 3,00, and a 6-position halogenated substitution degree of 0.92. For evaluation. -95-200526730 The results are shown in Table 1. [Example 5] A cellulose acetate was produced in the same manner as in Example 2 except that the cellulose acetate was cellulose acetate having a substitution degree of 2 · 8 and a viscosity average polymerization degree of 3 0, 6 and a halogenated substitution degree of 0.96. Plain film for evaluation. The results are shown in Table 1. [Example 6] A cellulose acetate was produced in the same manner as in Example 3, except that cellulose acetate was cellulose acetate having a degree of substitution of 2.87, a viscosity average degree of polymerization of 300, and a 6-position halogenated substitution degree of 0.92. Plain film for evaluation. The results are shown in Table 1. [Comparative Example 1] A cellulose acetate film was produced in the same manner as in Example 1 except that the solvent was changed to 62.2 parts by mass of methyl acetate, 6.5 parts by mass of acetone, 5.7 parts by mass of ethanol, and 6.5 parts by mass of butanol. Since cellulose acetate is not dissolved in a solvent, a thin film cannot be produced. [Comparative Example 2] A cellulose acetate film was produced in the same manner as in Example 2 except that the solvent was changed to 62.2 parts by mass of methyl acetate, 6.5 parts by mass of acetone, 5.7 parts by mass of ethanol, and 6.5 parts by mass of butanol. Since cellulose acetate is not dissolved in a solvent, a thin film cannot be produced. [Comparative Example 3] A cellulose acetate was produced in the same manner as in Example 3, except that the solvent was changed to 62.2 parts by mass of methyl acetate, 6.5 parts by mass of acetone, 5. 7 parts by mass of ethanol, and 6. 5 parts by mass of butanol. In the case of thin films, cellulose acetate is not soluble in the Soluble-96-200526730 agent, making it impossible to make films. [Comparative Example 4] A cellulose acetate film was produced in the same manner as in Example 1 except that cellulose acetate was cellulose acetate using a degree of substitution of 2.75, a degree of polymerization of 3, 10, and a degree of substitution of 0.8 to 6 of 0.84. Evaluation. The results are shown in Table 1. [Comparative Example 5] A cellulose acetate film was produced and evaluated in the same manner as in Example 2 except that the cellulose acetate was cellulose acetate using a degree of substitution of 2.75, a degree of polymerization of 310, and a degree of substitution of 0. 84 at the 6-position. The results are shown in Table 1. [Comparative Example 6] A cellulose acetate film was produced in the same manner as in Example 3, except that cellulose acetate was cellulose acetate using a degree of substitution of 2.7 5, and a degree of substitution of 3, 10, and 6 at a degree of polymerization of 0.8. Evaluation. The results are as shown in Table 1.

-97-200526730 Table 1

Film density Rth Plastic 11 Film surface visibility Example 1 1.278 3nm MAB Example 2 1.278 2 Onm AAB Example 3 1.278 Onm BAA Example 4 1.279 6nm AB Example 5 1.279 24nm AAB Example 6 1.279 3nm BAA Comparative Example 1 No film formation-j \\\--Comparative Example 2 No film formation-A--Comparative Example 3 No film formation-B--Comparative example 4 1.287 4 1 nm AD Comparative example 5 1.287 63nm AAD Comparative example 6 1.287 3 5nm BAC

[Example 7]

(Production of cellulose acetate film) The following composition was put into a mixing tank and stirred while heating to prepare a cellulose acetate mixture 11. In this case, cellulose acetate with a degree of substitution of 2.92 was used (Table 2). 7 5 parts by mass 3 0 0 parts by mass 5 4 parts by mass 1 1 part by mass < cellulose acetate mixture 1 1 cellulose acetate dichloromethane (first solvent) having a composition substitution degree of 2.92 methanol (second solvent) 1-butane Alcohol-98- 200526730 In another mixing tank, put the composition shown in the following Table 2 and stir while heating to dissolve each component to prepare additive solutions B-21 to B-25. To 4 6 5 parts by mass of the cellulose acetate mixture 1 1, 40 parts by mass of the additive solution B-2 1 to 2 5 was added to the obtained solution, and it was passed through a cast molding machine (depicted in Japanese Patent Application Laid-Open No. 1 1-3 1). 4 2 3 3) Casting was performed on a mirror stainless steel support with a diameter of 3 m roller. The temperature of the support was set at -5 ° C. The casting speed was 5 m / min, and the coating width was 200 cm. The space temperature of the entire casting section was set at 15 ° C. Then, the cellulose acetate film cast from the casting part 50 cm forward was peeled from the drum, and the two ends were transferred to the tenter's drying area while being fixed at both ends by a tenter with clamps. Dry air is extended while drying. The inside of the tenter is divided into 3 areas, and the temperature of the dry air in each area is 90 ° C, 100 ° C, and 110 ° C from the upstream side. The cellulose acetate film held by the tenter was transferred to a dry area. Start with 1 1 0. 〇 5 minutes, and then dried at 145 ° C for 10 minutes (film temperature is about 140 ° C) to produce cellulose acetate film samples 128 to 132 with a thickness of 40 / xm. About these samples, the hysteresis difference, the hysteresis difference in the film thickness direction of 10% RH and 80% RH (RthC ^ RthlOG / oRH-RthSOyoRH), the equilibrium water content at 25 ° C 8 0% RH, 60 ° C, 95% RH, 24hr moisture permeability (80μιη conversion), 80 ° C 90% RH, mass change after 48 hours, 60 ° C 95% RH, dimensional change after 24 hours and elastic modulus, use this Samples 128 to 132 of the low-density cellulose acetate film were found to have good performance. In addition, samples 1 2 9 to 1 3 2 containing an optical anisotropy-reducing agent and a wavelength dispersion adjusting agent were confirmed to have a retardation difference ARth or a retardation wavelength dependence of a relative thickness of 10% and a relative humidity of 80%. Sex is better. 200526730 Table 2 (No. 1) Sample No. Additive Solution Additive (addition amount: part by mass) A-19 K-4 Κ-5 L-5 UV-21 UV-22 UV-102 128 B-2 1 Μ j \ \ \ 4K and j \\\ Jia J \ Jia Μ j \ \\ Jia 1 29 B-22 (40) Μ J \ w > frrr. Without Μ «Μ Μ ΝΝ Without Μ j \ \\ 1 30 B-23 (40) Μ j \ \\ Μ ^ \\\ Μ j \ \\ Μ j \ \\ Μ j \ \\ (4) 13 1 B-24 Μ j \\\ (33) (33) ΛτχΫ Ι11Γ j \\\ (2) (2) Μ J > ΝΝ 1 32 B-25 Ga 4γγΐ. Ws Μ J \ ΝΝ (67) (2) (2) [化 4 1]

-100- 200526730 Table 2 (Part 2) Sample △ Rth Moisture content Moisture permeability Mass Dimensional change Elasticity Photoelastic density 1 28 3.0 3.4 1340 0.0 0.2 1 460 11 1.278 1 29 13.2 2.4 124 1 0.1 0.15 4 10 12 1.275 13 0 11.3 2.3 94 1 0.2 0.13 4 14 14 1.276 13 1 6.3 2.2 9 16 0.3 0.12 423 11 1.276 13 2 4.2 2.0 925 0.3 0.11 406 13 1.276 (Note) △ Rth: Rth (1 0% RH) -Rth (5 0 % RH) Moisture content: Measurement at 80% RH (%) Permeability: 8 0 / xm Conversion mass: 80 ° C, 90% RH, 48 hours: f mass change (%) Dimensional change: 60 ° C, 9 5% RH, change over 24 hours (%) Elasticity: kgf / m m2 Photoelasticity: x 1 〇-] 3cm2 / dyne (series: number) Table 2 (No. 3) Sample Re e (6 3 0) Rth (630) Re, disperse Rth disperse 128 0 .1 nm 1. Onm 2 .Onm 25 .Onm 129 0 .1 nm-2.8 nm 1 .5 nm 19 .3 nm 130 0 .1 nm-5.0 η m 0 .8 nm 5. 8 nm 13 1 0.1 nm 2.4nm 1 .5 nm 10 .5 nm 132 0 .2 nm-1.2 nm 1. .3 nm 9. 2 nm (Note)

Re Dispersion: | Re (400) -Re (700) | Rth Dispersion: | Rth (400) -Rth (700) | 200526730 [Example 8] (Preparation of cellulose acetate solution) The following composition was charged into a mixing tank The ingredients are stirred and mixed while heating to prepare a cellulose acetate mixture 12. (Composition of cellulose acetate mixture 1 2) Degree of substitution 2.9 2 cellulose acetate 8 0 · 0 parts by mass of methylene chloride (first solvent) 402.0 parts by mass of methanol (second solvent) 60.0 parts by mass (preparation of matting agent solution) 20 parts by mass of silica particles (AEROSIL R9 7 2, manufactured by Japan Aerosil Co., Ltd.) with an average particle diameter of 16 nm, and 80 parts by mass of methanol were mixed well for 30 minutes to form a silica particle dispersion. This dispersion is introduced into a disperser together with the following composition, and then stirred for 30 minutes or more to dissolve the components to prepare a matting agent solution. (Matting agent solution composition) Masaishi particle dispersion liquid having an average particle diameter of 16 nm 1 0.0 parts by mass of dichloromethane (first solvent) 7 6 · 3 parts by mass of methanol (second solvent) 3.4 parts by mass of cellulose acetate mixture 1 2 1 0.3 parts by mass (preparation of additive solution) The following composition was put into a mixing tank and stirred while heating to dissolve each component to prepare a cellulose acetate solution. As the compound for reducing optical anisotropy and the wavelength dispersion adjusting agent, those shown in Table 3 below are used. (Additive solution composition) 4 9 · 3 parts by mass

Compound for reducing optical anisotropy-2005-200526730 7.6 parts by mass 5 8 · 4 parts by mass 8 · 7 parts by mass 1 2 · 8 parts by mass 1 4 4 ~ 1 4 5) 9 4 · 6 parts by mass, matting agent After mass filtration, the wavelength dispersion adjusting agent monochloromethane (the first solvent) is mixed together. (The second solvent) cellulose acetate mixture 1 2 (cellulose acetate film sample 1 4 0 to 1 4 2. 1.3 parts by mass of the solution of the elementary mixture 12 and the additive solution 4.j were combined, and casting was performed in the same manner as in Example 7 to obtain a film having a thickness of 40-80 / Xm

film. The mass ratios of the cellulose acetate to the compound that reduces the optical anisotropy of the composition and the anti-dispersion regulator are 12% and 1.8%, respectively. In addition, a film having a residual solvent content of 30% was produced by peeling from a support. The cellulose acetate film was dried at 140 ° C for 40 minutes. The amount of residual solvent in the produced cellulose acetate film was 0.2%. Table 3 (No. 1) Sample No. Additive Solution Additive Strength Additive: Mass parts Density A-1 9 FB-6 FB-1 0 UV- 102 140 B-3 2 (50) sister J i NN j \ \\ (8) 1.277 141 B-33 (58) JWS > fnnr (8) 1.27 7 142 B-34 (58) 4γγγ ίκ J (8) 1.277 1 44 B-3 6 (80) 4ττΓ ΙΙΙΓ (8) 1.277 145 B-3 7 > fnr Sister (33) (8) 1.277 -103- 200526730 Table 3 (Part 2) Sample Film thickness Re (630) Rth (630) Re dispersion Rth dispersion 140 8 0 / X m 0.5 nm -4.2 nm 1.1 .1 nm 1 2.5 nm 14 1 6 0 μ m 0.3 η m -4.8 nm 0.7 nm 8.4 nm 142 4 0 μιη 0.2 η m -3.4nm 0.5 nm 5.2 nm 144 4 0 μιη 0.6 nm -2.1 nm 0.8 nm 1 5.2nm 145 4 0 μπα 0.5 η m -4.8 nm 0.6 nm 1 5. 1 nm (Note)

Re dispersion: | Re (400) -Re (700) |

Rth Dispersion: | Rth (400) -Rth (700) | [Comparative Example 7] (Preparation of Cellulose Acetate Solution) The following composition was put into a mixing tank and stirred to dissolve each component to prepare a cellulose acetate solution 2 1 . (Composition of Cellulose Acetate Solution 2 1) 100.0 parts by mass of dichloromethane (first solvent) with a degree of acetation of 2.86 402.0 parts by mass of methanol (second solvent) 60.0 parts by mass (preparation of matting agent solution) 20 parts by mass of silica particles (AEROSIL R972, manufactured by Japan Aero Co., Ltd.) with a diameter of 16 nm, and 80 parts by mass of methanol were well stirred and mixed as a silica particle dispersion for 30 minutes. This dispersion was put into a disperser together with the following composition, and then stirred for 30 minutes or more to dissolve the components to prepare a matting agent solution. (Composition of Matting Agent Solution) -104- 200526730 Silica particle dispersion with an average particle diameter of 16 nm 10.0 parts by mass of dichloromethane (first solvent) 76.3 parts by mass of methanol (second solvent) 3.4 parts by mass of cellulose acetate solution 2 1 1 0.3 parts by mass (preparation of additive solution)

The following composition was put into a mixing tank and stirred while heating to dissolve each component to prepare a cellulose acetate solution. As the compound for reducing optical anisotropy and the wavelength dispersion adjusting agent, those shown in Table 4 below are used. (Additive solution composition) Biphenyldiphenylphthalate (BDP) Wavelength dispersion adjuster methylene chloride (first solvent) Methanol (second solvent) Cellulose acetate solution 2 1 (Cellulose acetate film sample 〇 〇 〇 The above cellulose acetate solution 2 1 4 9.3 parts by mass 7.6 parts by mass 5 8.4 parts by mass 8.7 parts by mass 1 2.8 parts by mass (made by 1 spoon) 94.6 parts by mass of the matting agent

1.3 parts by mass of the liquid and 4. parts by mass of the additive solution were separately filtered and mixed, and casting was performed in the same manner as in Example 7 to obtain a film having a thickness of 40 / xm. The mass ratios are 12% and 1.8% with respect to cellulose acetate, which reduces the optical anisotropy of the composition and the wavelength dispersion modifier, respectively. A film with a residual solvent content of 30% was produced by peeling it from the support. It was dried at i 40 ° C for 40 minutes to produce a cellulose acetate film. The residual solvent content of the produced cellulose acetate film was 0.2%. In addition, in each sample, it was considered that there was no cloudiness (bleeding) of the film. About cellulose acetate film sample 0 0 8 ~ 0 0 9 except that it will be reduced to add -105- 200526730

Simultaneously, 'Mu in the liquid: the type and amount of the compound with different directionality and the wavelength dispersion adjusting agent' were changed to other than the content in Table 4 ', and the cellulose acetate film samples 0-8 to 009 were prepared in the same manner. The hysteresis difference ΔRth (= Rth10% RH-Rth80% RH) of the film thickness direction of these samples was measured at a relative humidity of 10% and a relative humidity of 80%. Comparative samples with a high film density of 008 to 010 are not less than 2511111, and the humidity dependence of optical anisotropy is not large.

-106- 200526730 Table 4 (No. 1) Sample additives (addition amount: part by mass) No. BDP UV-3 UV- 7 ARth Moisture content moisture permeability particle size 008 μm None 28 · 7 4.3 1310 1.73 009 None (3.8) (3.8) 28.3 3.3 1250 1.12 0 10 (49.3) (3.8) (3.8) 17.3 2.8 960 0.96 (Note) △ Rth: Rth (10% RH) -Rth (50% RH) Water content: at 80% R Measurement of Η (%) Permeability: 80 μπι Conversion particle size: Secondary average particle size of the matting agent (μηι) Table 4 (No. 2) Sample density Re (630) Rth (630) Re Rin dispersion Rth dispersion 008 1.282 3.4nm 2 7.5 nm 3. 8 nm 2 8.Onm 009 1.283 2.4 nm 2 8 · 2 nm 1.4nm 7.8 nm 0 10 1.282 3. 1 nm 3 0.2 nm 1. 0nm 6.8 nm

(Note)

Re dispersion: | Re (400) -Re (7 00) |

Rth Dispersion: | Rth (400) -Rth (700) | [Example 9] (Production of Polarizing Plate) The cellulose acetate film sample of the present invention obtained in Example 8 was 40% at 1.5 sodium hydroxide. The aqueous solution was immersed at 55 ° C for 2 minutes. It was washed in a room temperature water bath, and neutralized with sulfuric acid specified in 0.1 at 3 ° C. It was washed again in a room temperature water bath, and then air-dried at a temperature of -107-200526730 at 100 ° C. In this way, the surface of the cellulose acetate film was saponified. Then, a roll-shaped polyvinyl alcohol film having a thickness of 80 / xm was continuously extended 5 times in an iodine aqueous solution, and dried to obtain a polarizing film. Polyvinyl alcohol (Claret PVA-117H) 3% aqueous solution was used as an adhesive, and two alkali-saponified cellulose acetate film samples i 4 〇 were prepared and bonded between polarizing films to obtain polarizing plates protected by cellulose acetate film 1 4 0 on both sides. At this time, the late-phase axis system of the cellulose acetate film sample 140 on both sides is bonded in parallel with the transmission axis of the polarizing film. The sample 1 2 of Example 1 of the present invention 1 4 1 ~ 1 4 2, 1 4 4 are produced in the same manner. A polarizing plate of 1 to 4 5. The cellulose acetate film samples of the present invention 14 to 142 and 144 to 145 φ are sufficiently adhered to the fully-stretched polyvinyl alcohol, and have excellent polarizing plate processing suitability. Below the polarizing plate They are called polarizing plates 丨 4 〇 ~ i 4 2, 丨 4 4 ~丨 4 5. [Comparative Example 8] The protective system of the above polarizing film was replaced with two pieces of the cellulose acetate film of the present invention, and two pieces of commercially available polycarbonate film "Panlite C1400" (manufactured by Teijin Kasei) were used. A polarizing plate was produced in the same operation. However, the adhesion with the extended polyvinyl alcohol was insufficient, and the polycarbonate film did not function as a protective film for a polarizing film, and there was a problem in the suitability of the polarizing plate. 9] The above-mentioned polarizing film protection system was replaced by two pieces of the cellulose acetate film of the present invention, and two pieces of Arton film (manufactured by JSR) with a thickness of 80 μηα (made by JSR) were used to make a polarizing plate. The properties are inadequate, and the Arton film has no function as a protective film for polarizing films, and there are problems in the suitability of polarizing plates. (Polarizing plate durability) -108- 200526730 The produced cellulose acetate film sample 14 ~; 142, .14, 1 ~ 4, 4 ~ 1, 4 polarizers, the samples were left under the condition of 60% 95% R η for 5,000 hours for evaluation, the use of sample 1 4 0 ~ 1 4 2 And 1 4 4 to 1 4 5 are all excellent in polarizing characteristics. The use of the low-density cellulose film of the present invention and / or the addition of a compound or a wavelength dispersion adjusting agent that reduces optical anisotropy can confirm acetic acid. Cellulose film improves durability during processing of polarizing plate. [Example 10] (Evaluation of the installation of IPS-type liquid crystal display device) · Using the cellulose acetate film obtained in Examples 7 and 8 and the polarizing plate obtained in Example 9, Evaluation of the mounting of the liquid crystal display device confirmed that the optical performance was sufficient. In addition, this example uses an IP S-type liquid crystal cell. The following examples use VA-type and OCB-type liquid crystal cells, but the use of the polarizing plate or optical compensation film of the cellulose acetate film of the present invention is not affected by liquid crystal. The operation mode of the display device is limited. With respect to the polarizing plate produced in Example 9 1 4 0 to 1 4 2, 1 4 4 to 1 4 5 (Cellulose acetate film sample produced in Example 8 1 4 0 to 1 4 2, 1 4 4 to 1 4 5 _ produced polarizing plate) and the polarizing plate produced in the same manner as in Example 13 0 0 8 to 0 1 0 (the cellulose acetate film sample produced in Comparative Example 7 was 〇08 to 〇1 〇 Plate), Arton film (manufactured by JSR) is a uniaxially stretched optical compensation film that has an optical compensation function. At this time, the retardation axis system of the in-plane retardation of the optical compensation film intersects the transmission axis of the polarizing plate at right angles, and there is no change in the front characteristics, which improves the visual characteristics. The in-plane retardation Re of the optical compensation film is 2 70 nm, and the retardation Rth in the thickness direction is 0 nm. The Nz factor is 0.5. -109- 200526730 Make two sets of laminated body of the above-mentioned polarizing plate 1 4 4 and optical compensation film. For example, the optical compensation film is on the side of each liquid crystal cell. "Polarizing plate 1 44 and optical compensation 7 The liquid crystal cell of the IP S type + the polarizing plate 1 4 4 and the laminated body of the optical compensation film are alternately overlapped to make an in-line display device. At this time, the transmission axis of the upper and lower polarizing plates is orthogonal to each other, and the transmission axis of the upper polarizing plate is parallel to the molecular long axis direction of the liquid crystal cell (that is, the retardation axis of the optical compensation layer and the molecular long axis direction of the liquid crystal cell are orthogonal) . The liquid crystal cell or the electrode / substrate can be used as a conventional user of IPS. The alignment of the liquid crystal cell is horizontal alignment, and the liquid crystal has a positive dielectric anisotropy, which can be used for IP S liquid crystal developed and marketed by marketers. The physical property of the liquid crystal cell is Δ η of the liquid crystal: 0.0 9 9. The cell gap of the liquid crystal layer: 3 · 0 / xm, the pretilt angle: 5 degrees, and the rubbing direction: the substrate is 75 degrees above and below. Similarly, two sets of polarizing plates 140 to 142 and polarizing plate 145 are prepared to be laminated with an optical compensation film, so as to produce an IP S liquid crystal cell and an in-line display device. In the liquid crystal display device produced as described above, the results of measuring the light leakage rate in black display at 45 degrees in the azimuth direction and 70 degrees in the polar angle direction of the front of the device are described in Table 5. There is less light leakage in the oblique 45-degree direction than this angle, and the contrast of the display device is good, and the viewing angle characteristics of the liquid crystal display device can be evaluated. When the polarizing plates 140 to 2, 14 and 4 to 145 made of the cellulose acetate film of the present invention are used, compared with the case of using the polarizing plates 008 to 010 made of comparative samples, the light leakage rate is 1 / All time is small from 50 to 1/4. Furthermore, when the polarizing plates 1 4 0 to 1 2 and 1 4 4 to 1 4 5 are used, as compared with the case where the polarizing plates 0 0 8 to 0 1 0 are used, the color change of the display device becomes smaller. It is one of the Re and Rth of the acetate fiber -110-200526730 plain film S-type material 140-142 and 144-145 of the present invention, and has a small wavelength dependency, so the Re and Rth at any wavelength are absolutely small. The optical compensation film and polarizing plate produced from the cellulose acetate film of the present invention as described above are known to have excellent viewing angle characteristics and it is difficult to change the display color and taste. When the same evaluation was performed as in the case of using the films of Examples 1 to 6, when a light leakage of the IP S panel in black display is less than 0.2%, a display device having excellent performance can be obtained. Table 5 Sample film thickness Re (630) Rth (630) Re〉 Rth dispersion light leak 008 40 3, .4 nm 27 • 5 nm 3 .8 nm 2 8.0 nm 0. .5 1 009 40 2, .4nm 28 • 2 nm 1 .4nm 7.8 nm 0, .45 0 10 40 3 丨 .1 nm 3 0.2nm 1 .0 nm 6.8 nm 0, .52 140 8 0 0 .5 nm -4., 2nm 1. 1 nm 1 2.5 nm 0, 02 14 1 60 0 .3 nm -4_, 8 nm 0 .7 nm 8.4nm 0 '.03 142 40 0 .2 nm -3., 4nm 0. .5 nm 5.2 nm 0_. 02 144 80 0 .6 nm -2., 1 nm 0, .8 nm 1 5.2 nm 0. .01 145 80 0 .5 nm -4. 8 nm 0 '.8 nm 1 5. 1 nm 0., 02

(Note) Film thickness: / xm

Re dispersion: | Re (400) -Re (700) |

Rth dispersion: | Rth (400) -Rth (700) | Light leakage: Light leakage (%) of IPS panel black display [Example 1 1] (Evaluation of installation of VA and OCB liquid crystal display devices) Implementation Samples of cellulose acetate-111-200526730 of the present invention obtained in Examples 1 to 6 and Examples 7 and 8 are liquid crystal display devices including the liquid crystal display device described in Example 1 of Japanese Patent Application Laid-Open Nos. 10-4 8 4 2 0, Japanese Unexamined Patent Publication No. 9_26 5 7 2 describes the optically anisotropic layer of the dish-shaped liquid crystal molecules described in Example 1 and coated with an alignment film of polyvinyl alcohol. Japanese Unexamined Patent Application No. 2000- 0 5 1 2 4 1 When the VA-type liquid crystal display device described in FIGS. 2 to 9 and the OCB-type liquid crystal display device described in FIGS. 10 to 15 of JP-A-2000-154261 are evaluated, it can be obtained that the contrast angle of view is the same regardless of the occasion. Good performance. [Example 12] (Optical compensation film performance) The cellulose acetate film samples of the present invention obtained in Examples 1 to 6 and Examples 7 and 8 were described in Example 1 of Japanese Patent Application Laid-Open No. 7-3333343. The method is used to make optical compensation film samples. The obtained filter film has an excellent viewing angle on the left, right, and up. Therefore, it can be seen that the cellulose triacetate film of the present invention is excellent for optical applications. [Example 1 3] (Performance of optical compensation film) The cellulose acetate film samples of the present invention obtained in Examples 1 to 6 and Examples 7 and 8 were used in accordance with Japanese Patent Application Laid-Open No. 2 03-3 1 5 5 4 1 An optical compensation film sample was produced by the method described in Example 1. From 2,2'-double (3,4_two completed basic base) Liuquan Tingyuan Clinic— · Anhydrous (6FDA), and 2,2'-bis (trifluoromethyl) -4,4'-two Polyvinylidene S female synthesized by amine biphenyl (TFMB) with a weight average molecular weight (Mw) of 70,000 and about 0.004 'was prepared into a 25 wt% solution using cyclohexanone in a solvent' The coated cellulose acetate film sample of the present invention was 14 ° (thickness 80 / xm). After heat treatment at 100 ° C for 10 minutes, the 200526730 polyimide film having a thickness of 6 / xm can be obtained by coating the cellulose acetate film of the present invention with a 15% longitudinal uniaxial extension at 160 ° C. Optical compensation film. The prior characteristics of the optical patch film are Re = 70 nm, R th = 220 nm, the shear angle of the alignment axis is within ± 0.3 degrees, and has a birefringent layer of nx > ny > nz Optical compensation film. [Comparative Example 10] Except that g formula 140 of Example 8 was applied to Fuji TAC TD-80UF (thickness 80 μηι, Re = 5 nm, Rth = 41 nm), a polymer having a thickness of 6 μm was obtained by the same operation. The optical compensation film of the cellulose acetate film coated with the imine film was applied to the comparative sample 00. The optical characteristics of this optical compensation film were Re = 75 nm and Rth = 280 nm. (Evaluation of the installation of the VA-type liquid crystal display device) The uncoated polyimide film of the optical compensation film obtained in Example 8 and Comparative Example 10 was not coated. The side alkalization treatment adheres the direct polarizers by adhering the polarizers with a polyvinyl alcohol-based adhesive. At this time, the nx direction of the optical compensation film and the absorption axis of the polarizing plate are bonded to each other at right angles. These optical compensation films are bonded to the VA liquid crystal panel with an adhesive so as to be on the liquid crystal cell side. In addition, only the polarizing plate was bonded to the VA liquid crystal panel through the adhesive on the opposite side of the liquid crystal cell so that the absorption axes of the polarizing plates were orthogonal to each other. When measuring the viewing angle characteristics of the liquid crystal display device obtained as described above, the optical compensation film obtained from the cellulose acetate film sample 140 of the present invention obtained in Example 12 was about 40 times larger than the optical compensation film obtained from Fuji TAC TD-8 0UF. Those with excellent viewing angles up and down. Therefore, it can be seen that the cellulose triacetate film of the present invention is excellent even when used as an ancestral difference film for VA. [Example 14] (Evaluation of the installation of an IPS-type liquid crystal display device) 200526730 < Production of IP S-mode liquid crystal cell 1 > On a glass substrate, electrodes were provided so that the distance between adjacent electrodes was 20 / xm As described above, a polyimide film as an alignment film is provided thereon and subjected to a rubbing treatment. On the other surface of a separately prepared glass substrate, a polyimide film was provided for rubbing treatment as an alignment film. The two glass substrate-based alignment films face each other, and the interval (gap; d) of the substrates is 3.9 / xm. In order to make the rubbing directions of the two glass substrates parallel, repeat the bonding, and then encapsulate the refractive index anisotropy (△ η ) Is a nematic liquid crystal composition of 0.0 7 6 9 and a dielectric anisotropy (Δ ε) of 4.5 which is positive. The d · △ η of the liquid crystal layer is 300 nm. ≪ Production of polarizing plate > An extended polyvinyl alcohol film was made to adsorb iodine to produce a polarizing film. The polyvinyl alcohol-based adhesive was used to produce the polarizing film. A cellulose acetate film sample (R e 値 observed by the above-mentioned measurement method was 2 · 1) was attached to one side of the polarizing film. Next, a commercially available cellulose acetate film (Fuji TAC TF80UL, manufactured by Fuji Photo Film (Stock)) was saponified, and a polyvinyl alcohol-based adhesive was used to form a first polarizing plate attached to the opposite side of the polarizing film. . Furthermore, in the method for preparing the first polarizing plate, a second polarizing plate was produced in the same manner except that commercially available cellulose acetate films were used on both sides. In one of the IP S mode liquid crystal cells manufactured as described above, the absorption axis system of the first polarizing plate is parallel to the rubbing direction of the liquid crystal cell, and the cellulose acetate film of Example 2 is attached to form a liquid crystal cell. The side looks. Then, on the other side of the LCD cell in the IP S mode test, the second polarizing plate is attached in an orthogonal Nicol arrangement, and the side of the first polarizing plate is arranged as a backlight to produce a liquid crystal display device. -114- 200526730 [Comparative Example 1 1] In Example 14, the IPS liquid crystal display device was fabricated in the same manner except that the polarizing plates on both sides of the IP S cell were both second polarizing plates. < Measurement of light leakage of the produced liquid crystal display device > The change in the black taste of the thus-produced liquid crystal display device in the omnidirectional direction (Auv) at a polar angle of 60 degrees was measured. The results are summarized in Table 6. In Example 14 where △ uv is 0.05 or less, the color and taste change is hardly felt, but the comparative example of 0.05 or more has a color and taste change obviously. It can be seen that by using Re, Rth is small and Re, The cellulose acetate film of the present invention having a small wavelength dispersion has improved color and taste changes. Table 6 Re Rth protective film used for polarizing plate Change in black taste _________ (Auv) Example 14 Example 2 Cellulose acetate 2.1 20 0.03 Comparative Example 11 Fuji TAC TF-80UL 3 45 0.09

Claims (1)

200526730 10. Scope of patent application: 1. A cellulose acetate film characterized by a film density at 25 ° C of 1.280 or less and a hysteresis in the thickness direction of 2 nm to 2 Snm. 2. The cellulose acetate film according to item 1 of the patent application No. 5, wherein the hysteresis in the thickness direction is 0 to 25 nm. 3. The cellulose acetate film according to item 2 of the patent application, wherein the retardation 値 in the thickness direction is 0 to i 5 nm. 4. The cellulose acetate film according to any one of claims 1 to 3, wherein the absolute 値 of the in-plane retardation 値 is 0 to 10 nm. _ 5 • The cellulose acetate film according to any one of the claims 1 to 4, wherein the film thickness is from 0 to 5 00 / χπι. 6. The cellulose acetate film according to item 5 of the application, wherein the film thickness is 40 to 200 μm. 7. The cellulose acetate film according to any one of claims 1 to 6, wherein the cellulose acetate constituting the film has a degree of substitution in the range of 2.87 to 3.00. 8. If the cellulose acetate film according to any one of claims 1 to 7 of the patent application range, Lu further contains a retardation reducing agent that satisfies the following formula (I), and the retardation reducing agent has the following formula ( The amount of II): (I) (Rth (A) -Rth (0) / A ^ -1.0 (II) 0.01 ^ 30 [wherein 'Rth (A) is a substance containing 100 mass parts of cellulose acetate per 100 parts by mass of cellulose acetate. The retardation 値 in the thickness direction of the cellulose acetate film of the retardation reducing agent; Rth (0) is the retardation 値 in the thickness direction of the cellulose acetate film produced in the same manner except that the retardation reducing agent is not added; -116- 200526730 Addition amount of hysteresis reducing agent (parts by mass) of cellulose acetate] 9. If the cellulose acetate film according to any one of the claims 1 to 8 of the patent application scope, the chlorine solvent is Manufactured by the solvent casting method of the main solvent. 10 • The cellulose acetate film as described in item 9 of the patent application scope, wherein the mixture of the chlorine-based solvent and the cellulose acetate is cooled by _ i 〇〇 一 i 〇〇c Cellulose acetate solution prepared by the steps. 11. As described in item 10 of the scope of patent application Acid cellulose film, where a mixture of a chlorine-based solvent and cellulose acetate is used before the cooling step] 〇〇〜_ i 〇t The mixture of a chlorine-based solvent and cellulose acetate is used in _; [〇 ~ 5 5 t The cellulose acetate solution prepared by carrying out the swelling step. 1 2. For example, the cellulose acetate film of the scope of application for patent No. 丨 0, wherein a mixture of a chlorine solvent and cellulose acetate is used in _ i 〇〇〜_ i 0 C. After the cooling step, a mixture of a chlorine-based solvent and cellulose acetate is prepared by performing a heating step as described in 0 to 57. 1 3. As described in the cellulose acetate film of claim 9 in the patent application, wherein A mixture of a solvent and cellulose acetate uses a cellulose acetate solution prepared by a heating step of 30 to 2000 C. 1 4. An optical compensation sheet having at least one piece as described in the patent application range 1 to 1 3 A cellulose acetate film according to any one of the above items. 1 5. A polarizing plate having at least one piece of cellulose acetate film according to any one of the claims 1 to 13 of the patent application range. 1 6 · A liquid crystal display device having at least one piece of cellulose acetate film as described in any one of claims 1 to 13 of the scope of the patent application. 1 7 · Such as the liquid crystal display device of the sixth patent application, It is in VA mode or IPS mode. 200526730 7. Designated Representative Map: (1) The designated representative map in this case is: None. (2) Brief description of the component symbols of this representative map: Μ 〇j \\\ 8. If there is any In the case of a chemical formula, please disclose the chemical formula that best shows the characteristics of the invention: