KR20170067747A - Resin composition and optical compensation film using same - Google Patents

Abstract

(식 중, R₁, R₂, R₃ 은 각각 독립적으로 수소 또는 탄소수 1 ∼ 12 의 치환기를 나타낸다.) A resin composition suitable for an optical compensation film, an optical compensation film excellent in retardation and wavelength dispersion characteristics using the resin composition, and a method for producing an optical compensation film are provided. A resin composition comprising 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer as a resin component.

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.)

Description

RESIN COMPOSITION AND OPTICAL COMPENSATION FILM USING SAME [0002]

The present invention relates to a resin composition and an optical compensation film using the same, and more particularly, to an optical compensation film for a liquid crystal display having a resin composition and excellent retardation and wavelength dispersion characteristics.

BACKGROUND ART [0002] Liquid crystal displays are widely used as mobile phones, computer monitors, notebook personal computers, and televisions as the most important display devices in a multimedia society. Many optical films have been used in liquid crystal displays to improve display characteristics. Particularly, the optical compensation film plays a large role in improving the contrast and compensation of color tone when viewed frontally or obliquely.

There are many types of liquid crystal displays such as a VA-LCD, an IPS-LCD, a super twisted nematic liquid crystal (STN-LCD), a reflective liquid crystal display, and a transflective liquid crystal display. An optical compensation film adapted to a display is required.

As a conventional optical compensation film, a stretched film such as a cellulose-based resin, polycarbonate, or a cyclic polyolefin is used. In particular, a film made of a cellulose-based resin such as a triacetyl cellulose film is widely used because of its good adhesiveness to polyvinyl alcohol as a polarizer.

However, the optical compensation film made of a cellulose-based resin has several problems. For example, a cellulose-based resin film is processed into an optical compensation film having a retardation value adapted to various displays by adjusting stretching conditions. However, the three-dimensional refractive index of a film obtained by uniaxial or biaxial stretching of a cellulose- In order to produce an optical compensation film having a three-dimensional refractive index such as ny ≥ nx> nz and other three-dimensional refractive indices such as ny> nz> nx and ny = nz> nx, A special stretching method is required, such as applying a heat shrinkable film to the laminate and heat stretching the laminate to apply a shrinkage force in the thickness direction of the polymer film, and it is also difficult to control the refractive index (phase difference value) 1 to 3). Here, nx is the refractive index in the fast axis direction (the direction with the smallest refractive index) in the film plane, ny is the refractive index in the slow axis direction (the direction with the greatest refractive index) in the film plane, and nz is the refractive index outside the film plane direction (thickness direction).

 Since the cellulose resin film formed by the casting method has an out-of-plane retardation (Rth) of about 40 nm in the thickness direction of the film, the IPS mode liquid crystal display There is a problem that a color shift occurs. Here, the out-of-plane retardation (Rth) is a retardation value expressed by the following formula.

Rth = [(nx + ny) / 2 - nz] xd

(Where nx is the refractive index in the fast axis direction in the film plane, ny is the refractive index in the slow axis direction in the film plane, nz is the refractive index outside the film surface, and d is the film thickness).

 Further, a retardation film made of a fumaric acid ester resin has been proposed (for example, see Patent Document 4).

However, the three-dimensional refractive index of a stretched film made of a fumaric acid ester-based resin is nz> ny> nx. In order to obtain an optical compensation film exhibiting the three-dimensional refractive index, lamination with another optical compensation film or the like is required.

Therefore, as the optical compensation film showing the three-dimensional refractive index, a resin composition and an optical compensation film using the resin composition have been proposed (see, for example, Patent Documents 5 to 7).

Patent Documents 5 to 7 have excellent performance as an optical compensation film, but they require a thicker film thickness than the present invention for the purpose of expressing Re. In general, the retardation film is also used as an antireflection layer of a reflection type liquid crystal display device, a touch panel, or an organic EL. In this application, a retardation film having a larger retardation (hereinafter referred to as " reverse wavelength dispersion film & However, in Patent Documents 5 to 7, there is no description as to what is used as an inverse wavelength dispersion film.

When an antireflection film is used as the antireflection layer, the retardation is preferably about 1/4 of the wavelength?, And the ratio Re (450) / Re (450) to retardation at 450 nm 550) is preferably close to 0.81. In consideration of the thinness of the display device, the reverse wavelength dispersion film to be used is also required to be thin. Various retardation films have been developed with respect to the above-mentioned required characteristics.

As such a retardation film, a retardation film having an opposite wavelength dispersion property obtained by blending a polymer having a positive intrinsic birefringence and a polymer having negative intrinsic birefringence has been disclosed (see, for example, Patent 8). However, this document discloses a norbornene polymer as a polymer having a positive intrinsic birefringence, a copolymer of styrene and maleic anhydride as a polymer having negative intrinsic birefringence, and a composition obtained by blending these polymers. The retardation plate used does not satisfy the relationship of Re and Nz preferable as the retardation property of the retardation film.

Japanese Patent Publication No. 2818983 Japanese Patent Application Laid-Open No. 5-297223 Japanese Unexamined Patent Publication No. 5-323120 Japanese Laid-Open Patent Application No. 2008-64817 Japanese Laid-Open Patent Publication No. 2013-28741 Japanese Laid-Open Patent Publication No. 2014-125609 Japanese Laid-Open Patent Publication No. 2014-125610 Japanese Laid-Open Patent Publication No. 2001-337222

The present invention has been made in view of the above problems, and an object thereof is to provide a resin composition suitable for an optical compensation film, and an optical compensation film excellent in retardation and wavelength dispersion characteristics using it.

DISCLOSURE OF THE INVENTION The present inventors have intensively studied to solve the above problems and found that a resin composition containing a specific cellulose resin and a cinnamate ester copolymer, an optical compensation film using the same, The present invention has been completed.

That is, the present invention is in the following [1] to [29].

[1] A resin composition comprising, as a resin component, 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer.

[Chemical Formula 1]

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.)

[2] The resin composition according to [1], wherein the cinnamate ester copolymer comprises 10 to 90 mol% of alkoxy cinnamate ester residue units represented by the following formula (2).

(2)

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[3] The thermosetting resin composition according to any one of [1] to [3], wherein the cinnamate ester copolymer comprises 5 to 50% by mole of a fumaric acid monoester residue unit represented by the following formula (3), 0 to 85% by mole of a fumaric acid diester residue unit represented by the following formula And 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (2).

(3)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)

[Chemical Formula 4]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

[Chemical Formula 5]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[4] The thermosetting resin composition according to any one of [1] to [4], wherein the cinnamate ester copolymer comprises 10 to 50% by mole of a fumaric acid monoester residue unit represented by the following formula (3), 0 to 60% by mole of a fumaric acid diester residue unit represented by the following formula And 30 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (2).

[Chemical Formula 6]

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)

(7)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

[Chemical Formula 8]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[5] The method according to any one of [1] to [5], wherein the cinnamate ester copolymer is selected from the group consisting of a fumaric acid monomethyl residue unit, a fumaric acid monoethyl residue unit, a fumaric acid monoisopropyl residue unit, a fumaric acid mono-n-propyl residue unit, a fumaric acid mono-n- 5 to 50 mol% of a fumaric acid monoester residue unit selected from a butyl residue unit, a fumaric acid mono-2-ethylhexyl residue unit, a dimethyl fumarate residue unit, a fumarate diethyl residue unit, a fumaric acid diisopropyl residue unit, 0 to 85 mol% of a fumaric acid diester residue unit selected from the group consisting of a propyl residue, a di-n-butyl fumarate residue, a di-t-butyl fumarate residue and a di-2-ethylhexyl fumarate residue, , And 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (2). Honesty.

[Chemical Formula 9]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[6] The thermosetting resin composition according to any one of [1] to [5], wherein the cinnamate ester copolymer comprises 5 to 85 mol% of a fumaric acid diester residue unit represented by the following formula (4), an acrylic ester residue unit represented by the following formula And 5 to 40 mol% of a residue unit selected from the group consisting of an acrylic acid amide residue unit represented by the following general formula (7) and a methacrylic acid amide residue unit represented by the following general formula (8) And 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (2).

[Chemical formula 10]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

(11)

[Chemical Formula 12]

[Chemical Formula 13]

[Chemical Formula 14]

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)

[Chemical Formula 15]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[7] The thermosetting resin composition according to any one of [1] to [5], wherein the cinnamate ester copolymer comprises 5 to 65% by mole of a fumaric acid diester residue unit represented by the following formula (4), an acrylic acid ester residue unit represented by the following formula And 5 to 40 mol% of a residue unit selected from the group consisting of an acrylic acid amide residue unit represented by the following general formula (7) and a methacrylic acid amide residue unit represented by the following general formula (8) And 30 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (2).

[Chemical Formula 16]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

[Chemical Formula 17]

[Chemical Formula 18]

[Chemical Formula 19]

[Chemical Formula 20]

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)

[Chemical Formula 21]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

[8] The composition according to any one of [1] to [5], wherein the cinnamate ester copolymer comprises 20 mol% or more of a fumaric acid diester residue unit represented by the following formula (4) and 5 mol% or more of a substituted cinnamate ester residue unit represented by the following formula The resin composition according to [1] above.

[Chemical Formula 22]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

(23)

(Wherein R ₁₃ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

[9] The cinnamic ester copolymer according to any one of [1] to [5], wherein the cinnamic acid ester copolymer comprises 20 mol% or more of a fumaric acid diester residue unit represented by the following formula (4) and 5 mol% or more of a p-substituted cinnamic acid ester residue unit represented by the following formula (1). ≪ / RTI >

≪ EMI ID =

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

(25)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

[10] The composition according to any one of [1] to [10], wherein the cinnamic acid ester copolymer comprises 20 to 90% by mole of a fumaric acid diester residue unit represented by the following formula (4), 5 to 75% by mole of a p-substituted cinnamic acid ester residue unit represented by the following formula The resin composition according to the above [1], which comprises 5 to 30 mol% of a fumaric acid monoester residue unit represented by the general formula (3).

(26)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

(27)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

(28)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)

[11] The composition according to any one of [1] to [11], wherein the cinnamic acid ester copolymer contains 20 to 95% by mole of diethyl fumarate moiety units, 5 to 75% by mole of substituted cinnamate ester moiety units represented by general formula (10) A fumaric acid ester copolymer comprising 0 to 30 mol% of fumaric acid monoester residue units, 20 to 90 mol% of diisopropyl fumarate residue units, 5 to 75 mol% of p-substituted cinnamic acid ester residue units represented by general formula (10) , A fumaric acid ester copolymer containing 5 to 30 mol% of a fumaric acid monoester residue unit represented by the following formula (3), 20 to 90 mol% of a di-t-butyl residue group of fumaric acid, and p 5 to 75 mol% of positionally substituted cinnamic acid ester residue units and 5 to 30 mol% of fumaric acid monoester residue units represented by the general formula (3) The resin composition described in [1] above, characterized in that cinnamic acid ester copolymer is selected from the group consisting of Terre copolymer.

[Chemical Formula 29]

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

(30)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)

[12] The fumaric acid monoester residue unit as described in [10] or [11] above, wherein the fumaric acid monoester residue unit is at least one selected from the group consisting of fumaric acid monomethyl residue unit, fumaric acid monoethyl residue unit, fumaric acid monoisopropyl residue unit, fumaric acid mono- Is a fumaric acid monoester residue unit selected from the group consisting of a mono-n-butyl residue unit, a mono-s-butyl residue unit of fumarate, a mono-t-butyl residue unit of fumarate, and a mono-2-ethylhexyl residue of fumarate And the resin composition according to the above [10] or [11].

[13] The composition according to any one of [1] to [13], wherein the cinnamate ester copolymer comprises 20 to 94.5% by mole of a fumaric acid diester residue unit represented by the following general formula (4), 5 to 75% by mole of a p-position substituted cinnamate ester residue unit represented by the following general formula A methacrylate residue unit represented by the following general formula (6), an acrylic acid amide residue unit represented by the following general formula (7), a methacrylate residue unit represented by the following general formula (8) And 0.5 to 30 mol% of a residue unit selected from the group consisting of an acid amide residue unit.

(31)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

(32)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

(33)

(34)

(35)

(36)

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)

[14] The method according to any one of [1] to [14], wherein the p-position substituted cinnamic acid ester residue unit is selected from the group consisting of a 4-nitro cinnamate methyl residue unit, a 4-nitro cinnamate ethyl residue unit, a 4-nitro cinnamate isopropyl residue unit, Nitro cinnamate tert-butyl residue unit, 4-nitro cinnamic acid 2-ethylhexyl residue unit, 4-fluoro cinnamate methyl residue unit, 4-fluoro cinnamate residue, , 4-fluoro cinnamate isopropyl residue unit, 4-fluoro cinnamate isopropyl residue unit, 4-fluoro cinnamate n-propyl residue unit, 4-fluoro cinnamate n-butyl residue unit, 4-fluoro cinnamate sec- Chlorosuccinic acid ethyl ester unit, 4-chloro cinnamic acid isopropyl residue unit, 4-chloro cinnamic acid isopropyl residue unit, 4-chloro cinnamic acid isopropyl residue unit, Cinnamic acid n-propyl residue Chloro stearic acid tert-butyl residue unit, 4-chloro cinnamic acid 2-ethylhexyl residue unit, 4-bromo cinnamic acid methyl residue Unit, 4-bromo cinnamate ethyl residue unit, 4-bromo cinnamate isopropyl residue unit, 4-bromo cinnamate n-propyl residue unit, 4-bromo cinnamate n-butyl residue unit, 4- Butyl 4-bromoacetate, 2-ethylhexyl 4-bromo cinnamate, methyl 4-iodoacetate, ethyl 4-iodoacetate, isopropyl 4-iodoate, Unit, 4-iodo-cinnamic acid n-propyl residue unit, 4-iodo-n-butyl residue unit of cinnamate, sec-butyl residue unit of 4-iodo cinnamate, tert- butyl residue unit of 4- Residue unit, methyl 4-cyano cinnamate residue unit, ethyl 4-cyano cinnamate unit 4-cyanoacetic acid isopropyl residue unit, 4-cyano cinnamic acid n-propyl residue unit, 4-cyano cinnamic acid n-butyl residue unit, 4-cyano cinnamic acid isobutyl residue unit, 4-sulfonic acid methyl ester residue, 4-sulfonic acid ethyl ester residue, 4-sulfonic acid isopropyl residue unit, 4-sulfonic acid isopropyl residue unit, 4-sulfonic acid cinnamic acid n- Butyl ester unit of 4-sulfonic acid, tert-butyl residue unit of 4-sulfonic acid cinnamate, 2-ethylhexyl residue unit of 4-sulfonic acid cinnamate, 4- Carboxylic acid cinnamic acid isopropyl residue unit, 4-carboxylic acid cinnamic acid n-propyl residue unit, 4-carboxylic acid cinnamate n-butyl residue unit, 4-carboxylic acid cinnamate sec- Unit, a tert-butyl residue unit of 4-carboxylic acid cinnamate, a 4-carboxylic acid Phenyl sebacate, ethyl 4-phenylhexanoate residue, 4-phenylhexanoate residue, 4-phenylhexanoate residue, 4-phenylhexanoate residue, Wherein the repeating unit is selected from the group consisting of a residue unit, a sec-butyl residue unit of 4-phenyl cinnamate, a tert-butyl residue unit of 4-phenyl cinnamate and a 2-ethylhexyl residue unit of 4- 13]. ≪ / RTI >

[15] The resin compound according to any one of [1] to [14], wherein the cellulose-based resin represented by the general formula (1) is a cellulose ether.

[16] The resin composition according to the above-mentioned [15], wherein the etherification degree (substitution degree) of the cellulose ether is 1.5 to 3.0.

[17] An optical compensation film comprising the resin composition according to any one of [1] to [16], wherein the thickness is 5 to 200 μm.

[18] An optical compensation film comprising the resin composition according to any one of [1] to [16], wherein the thickness is 20 to 60 μm.

[19] The method as described in [17] or [18] above, wherein the in-plane retardation Re represented by the following formula (1) is 80 to 300 nm and the Nz coefficient represented by the following formula (2) is 0.35 to 0.65 ≪ / RTI >

Re = (ny - nx) xd (1)

Nz = (ny - nz) / (ny - nx) (2)

(Where nx represents the refractive index in the fast axis direction in the film plane, ny represents the refractive index in the slow axis direction in the film plane, nz represents the refractive index outside the film surface, and d represents the film thickness).

[20] The optical compensation film as described in [17] or [18] above, wherein the in-plane retardation Re represented by the formula (1) is 50 to 300 nm and the Nz coefficient represented by the formula (2) Optical compensation film.

[21] The liquid crystal composition according to [17] or [20], wherein the in-plane retardation Re represented by the formula (1) is 0 to 20 nm and the out-of-plane retardation Rth represented by the following formula (3) The optical compensation film described in [18].

Rth = [(nx + ny) / 2 - nz] xd (3)

(Where nx represents the refractive index in the fast axis direction in the film plane, ny represents the refractive index in the slow axis direction in the film plane, nz represents the refractive index outside the film surface, and d represents the film thickness).

[22] The optical compensation film according to any one of [17] to [21], wherein the light transmittance is 85% or more.

[23] The optical compensation film according to any one of [17] to [22], wherein the haze is 1% or less.

Wherein the retardation at 450 nm and the retardation at 550 nm satisfy Re (450) / Re (550) of 0.60 <Re (450) / Re (550) <1.05. 17] to [23].

[25] The optical film according to any one of [17] to [24], wherein the retardation at 589 nm and the film thickness ratio Re (589) (nm) / film thickness (탆) is 4.0 nm / The optical compensation film described in any one of claims 1 to 6.

[26] A resin composition comprising 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer as a resin component is dissolved in a solvent, The method for producing an optical compensation film according to any one of the above [17] to [25], wherein the film is peeled from the substrate after drying.

(37)

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.)

[27] The production method of an optical compensation film as described in the above [26], wherein the degree of etherification (substitution degree) when the cellulose resin represented by the general formula (1) is cellulose ether is 1.5 to 3.0.

[28] A process for producing an optical compensation film as described in [19] or [20], wherein a film having a thickness of 10 to 200 μm obtained by casting is uniaxially or uniaxially stretched.

[29] The method for producing an optical compensation film as described in [19] or [20] above, wherein the film having a thickness of 30 to 100 μm obtained by casting is uniaxially or uniaxially stretched.

Hereinafter, the present invention will be described in detail.

The resin composition of the present invention contains as a resin component 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer.

(38)

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.)

Examples of the cellulose-based resin of the present invention include cellulose ethers, cellulose esters, cellulose ether esters, and cellulose acylates. The resin composition of the present invention may contain one or more of these cellulose resins.

The cellulose-based resin of the present invention is excellent in mechanical properties and excellent in moldability at the time of film formation (film formation), and therefore, the cellulose-based resin of the present invention can be obtained by using a standard polystyrene obtained from an elution curve measured by gel permeation chromatography (GPC) The number average molecular weight (Mn) in terms of the conversion is preferably 1 x 10 ³ to 1 x 10 ⁶ , more preferably 5 x 10 ³ to 2 x 10 ⁵ .

The cellulose-based resin of the present invention is preferably cellulose ether because of its excellent compatibility with cinnamate ester copolymer, its large in-plane retardation Re and its excellent stretchability.

Hereinafter, the cellulose ether preferable as the cellulose resin used in the optical compensation film of the present invention will be described.

The cellulose ether which is a cellulose resin of the present invention is a polymer obtained by polymerizing a? -Glucose unit in a linear chain and etherifying a part or all of the hydroxyl groups at 2-position, 3-position and 6-position of the glucose unit. Examples of the cellulose ether of the present invention include alkylcelluloses such as methylcellulose, ethylcellulose and propylcellulose, hydroxyalkylcelluloses such as hydroxyethylcellulose and hydroxypropylcellulose, and cellulose ethers such as benzylcellulose and tritylcellulose. Carboxymethylcellulose, carboxymethylcellulose, and other carboxyalkylcelluloses; carboxymethylmethylcellulose; carboxyalkylalkylcelluloses such as carboxymethylethylcellulose; aminoalkylcelluloses such as aminoethylcellulose; and aminoalkylcelluloses such as carboxymethylcellulose and carboxymethylcellulose; carboxymethylcelluloses such as carboxymethylcellulose and carboxymethylcellulose; And the like.

The degree of substitution (degree of etherification) in which the cellulose in the cellulose ether is substituted via the oxygen atom of the hydroxyl group of the cellulose is such that the ratio of the hydroxyl groups of the cellulose to the etheric groups of the 2-position, 3-position and 6-position The etherification of% means the degree of substitution 1). From the viewpoints of solubility, compatibility, and stretchability, the total degree of substitution DS of the ether group is preferably 1.5 to 3.0 (1.5? DS? 3.0) To 1.8 ~ 2.8. The cellulose ether preferably has a substituent having 1 to 12 carbon atoms in terms of solubility and compatibility. Examples of the substituent having 1 to 12 carbon atoms include methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decanyl, dodecanyl, , A cyclohexyl group, a phenynyl group, a benzyl group, and a naphthyl group. Of these, methyl, ethyl, propyl, butyl and pentyl groups, which are alkyl groups having 1 to 5 carbon atoms, are preferred from the viewpoints of solubility and compatibility. The cellulose group polymer used in the present invention may have only one ether group or two or more ether groups. In addition, an ester group may be contained in addition to the ether group.

Cellulose ether is generally synthesized by alkaline degradation of cellulose pulp obtained from wood or cotton and etherification of alkaline degraded cellulose pulp. As the alkali, hydroxide of an alkali metal such as lithium, potassium, sodium, ammonia, or the like can be used. The above-mentioned alkali is generally used as an aqueous solution. The alkaline cellulose pulp is etherified by contacting with the etherifying agent used depending on the type of the cellulose ether. Examples of the etherifying agent include halogenated alkyls such as methyl chloride and ethyl chloride, halogenated aralkyls such as benzyl chloride and trityl chloride, halocarboxylic acids such as monochloroacetic acid and monochloropropionic acid, ethylene oxide, propylene oxide , And alkylene oxides such as butylene oxide. These etherifying agents may be used alone or in combination of two or more.

If necessary, after completion of the reaction, the solution may be subjected to depolymerization treatment with hydrogen chloride, hydrogen bromide, hydrochloric acid, sulfuric acid or the like to adjust the viscosity.

The cinnamic acid ester copolymer (hereinafter referred to as cinnamic acid ester copolymer) contained in the resin composition of the present invention contains a cinnamic acid ester residue unit, and examples of the residue unit include methyl cinnamate residue, ethyl cinnamate residue A cinnamic acid ester residue unit in which a benzene ring in a cinnamic acid ester residue unit such as a cinnamic acid isomer residue unit does not have a substituent, a benzen ring such as an amino cinnamic acid ester residue unit, an alkyl cinnamate ester residue unit or an alkoxy cinnamic acid ester residue unit, A cinnamic acid ester residue unit having a female substituent; and a cinnamic acid ester residue unit having a benzene ring of an electron withdrawing substituent such as a substituted cinnamic acid ester residue unit represented by the following general formula (9).

[Chemical Formula 39]

(Wherein R ₁₃ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

In the present invention, since cinnamic acid ester copolymer is used as a retardation film, a higher-performance retardation film can be obtained. Therefore, a cinnamic acid ester residue unit having a benzene ring as an electron-donating substituent or a benzen ring having an electron- And a cinnamate ester copolymer containing 5% by mole or more of cinnamic acid ester residue units.

Further, in the present invention, it is more preferable that the cinnamic acid ester copolymer contains 10 to 90 mol% of the alkoxy cinnamate ester residue unit represented by the following general formula (2).

(40)

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms).

In the present invention, when the alkoxy cinnamate ester residue unit is 10 mol% or more, the retardation development is further improved, and when it is 90 mol% or less, the compatibility is further improved. That is, the present invention relates to a cinnamic acid ester copolymer comprising a cinnamic acid ester copolymer containing 10 to 90 mol% of alkoxy cinnamic acid ester residue units, wherein the copolymer has higher compatibility and the resin composition according to the present invention is optically When used as a compensation film, Re is being further improved.

R _{4, which} is an ester substituent of the alkoxy cinnamate ester residue unit represented by the general formula (2) in the cinnamic acid ester copolymer, is an alkyl group having 1 to 12 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, Butyl group, a s-pentyl group, a t-pentyl group, an s-hexyl group, a t-hexyl group, a 2-ethylhexyl group, a cyclopropyl group, a cyclopentyl group and a cyclohexyl group have. Of these, methyl group, ethyl group, propyl group and butyl group, which are alkyl groups having 1 to 4 carbon atoms, are preferable from the viewpoint of compatibility with cellulose resin. The ester substituent R ₅ is an alkyl group having 1 to 12 carbon atoms and includes, for example, methyl, ethyl, propyl, isopropyl, s-butyl, hexyl group, s-hexyl group, t-hexyl group, 2-ethylhexyl group, cyclopropyl group, cyclopentyl group and cyclohexyl group. Of these, methyl, ethyl, propyl and butyl groups, which are alkyl groups having 1 to 4 carbon atoms, are preferred from the viewpoints of solubility and compatibility. Examples of the alkoxy cinnamate ester residue unit represented by the general formula (2) include 4-methoxy cinnamate methyl residue, 4-methoxy cinnamate ethyl residue, 4-methoxy cinnamate isopropyl residue, 4- Methoxy cinnamate tert-butyl residue, 4-methoxy cinnamic acid 2-ethylhexyl residue, 4- methoxy cinnamic acid n-propyl residue, 4-methoxy cinnamate n-butyl residue, 4-ethoxy cinnamate isopropyl residue, 4-ethoxy cinnamic acid n-propyl residue, 4-ethoxy cinnamate n-butyl residue, 4-ethoxy cinnamate sec- Butyl ester, 4-ethoxypropionate, tert-butyl 4-ethoxyacetate, 2-ethylhexyl 4-ethoxyacetate, methyl 4-isopropoxyacetate, ethyl 4-isopropoxyacetate, N-propyl residue of 4-isopropoxy cinnamate, n-butyl residue of 4-isopropoxy cinnamate, 4-isopropoxy 4-n-propoxy cinnamate methyl residue, 4-n-propoxy cinnamate ethyl residue, 4-n-propoxy cinnamate ethyl residue, 4-n-propoxy cinnamate ethyl residue, 4-n-propoxy cinnamate isopropyl moiety, 4-n-propoxy cinnamate n-propyl moiety, 4-n-propoxy cinnamate n-butyl moiety, 4-n-butoxy cinnamic acid methyl residue, 4-n-butoxy cinnamic acid ethyl residue, 4-n-butoxy cinnamic acid isopropyl ester, Butyl n-butoxy cinnamate n-butyl residue, 4-n-butoxy n-propyl n-butoxy cinnamate n-propyl residue, 2-ethylhexyl residue of 4-n-butoxy cinnamic acid, methyl residue of 4-sec-butoxy methyl acid, ethyl residue of 4-sec-butoxy methacrylic acid, isopropyl residue of 4-sec-butoxy methacrylic acid, Cinnamic acid n-propyl residue, 4-sec-butoxy clock Butyl naphthyl residue, 4-sec-butoxy n-butyl residue, 4-sec-butoxy n-butyl residue, Tert-butoxycinnamic acid ethyl ester, 4-tert-butoxycinnamic acid isopropyl ester, 4-tert-butoxycinnamic acid n-propyl residue, 4- tert-butoxycinnamic acid tert-butyl residue, 4-tert-butoxycinnamic acid tert-butyl residue, 4-tert-butoxycinnamic acid 2-ethylhexyl residue, 3-methoxy cinnamic acid methyl residue, 3-methoxy cinnamic acid ethyl residue , 3-methoxy cinnamate isopropyl moiety, 3-methoxy cinnamate n-propyl moiety, 3-methoxy cinnamate n-butyl moiety, 3-methoxy cinnamate sec-butyl moiety, 3-methoxy cinnamate tert- 2-ethylhexyl residue of 3-methoxy cinnamate, methyl residue of 3-ethoxy residue, residue of ethyl residue of 3-ethoxy residue, residue of isopropyl residue of 3-ethoxy residue, n-propyl residue of 3-ethoxy residue, Cinnamic acid n- Ethyl 3-ethoxypropionate, 2-ethylhexyl 3-ethoxypropionate residue, methyl 3-isopropoxypropionate residue, ethyl 3-ethoxypropionate residue, Isopropoxy cinnamate isopropyl residue, 3-isopropoxy cinnamate n-propyl residue, 3-isopropoxy cinnamate n-butyl residue, 3-isopropoxy cinnamate sec-butyl residue, 3- 3-n-propoxy cinnamate methyl residue, 3-n-propoxy cinnamate ethyl residue, 3-n-propoxy cinnamate isopropyl residue, 3-n-propoxy cinnamate isopropyl moiety, 3-n-propoxy cinnamate isopropyl moiety, 3-n-propoxy cinnamic acid n-propyl residue, 3-n-propoxy cinnamate n-butyl residue, 3-n-propoxy cinnamate sec- 2-ethylhexyl residue of propoxy cinnamic acid, 3-n-butoxy methacrylic acid methyl residue, 3-n-butoxy methacrylic acid ethyl residue, 3-n-butoxy methacrylic acid isopropyl residue, Butoxy residue, 3-n-butoxy sebacic acid n-propyl residue, 3-n-butoxy sebacic acid n-butyl residue, 2-ethylhexyl residue, methyl 3-sec-butoxy methacrylate residue, ethyl 3-sec-butoxy methacrylate residue, isopropyl 3-sec-butoxy methacrylate residue, butoxy residues, tert-butyl 3-sec-butoxy cinnamate, 3-ethylhexyl 3-sec-butoxy cinnamate residues, 3- tert-butoxycinnamic acid methyl residue, 3-tert-butoxycinnamic acid ethyl residue, 3-tert-butoxycinnamic acid isopropyl residue, 3-tert- Butyl residue, a tert-butyl residue of 3-tert-butoxy methacrylate, a 2-ethylhexyl residue of 3-tert-butoxy methacrylate, a methyl residue of 2-methoxy cinnamate, a 2- Ethyl methoxy cinnamate residue, 2-methoxy cinnamic acid isopropyl Butyl residue, 2-methoxy cinnamate sec-butyl residue, 2-methoxy cinnamate tert-butyl residue, 2-methoxy cinnamate 2-methoxy cinnamate 2- 2-ethoxy cinnamate isopropyl residue, 2-ethoxy cinnamate n-propyl residue, 2-ethoxy cinnamate n-butyl residue, 2-ethoxy cinnamate residue, 2-ethylhexyl residue, 2-isopropoxy residue methyl residue, 2-isopropoxy residue ethyl residue, 2- isopropoxy residue ethyl residue, 2- Isopropyloxy cinnamate isopropyl residue, 2-isopropoxy cinnamate n-propyl residue, 2-isopropoxy cinnamate n-butyl residue, 2-isopropoxy cinnamate sec-butyl residue, 2-isopropoxy cinnamate tert- butyl Ethyl 2-ethylhexyl residue, 2-n-propoxy residue, 2-n-propoxy residue, 2-n-propoxy residue, 2-n-propoxy cinnamate tert-butyl ester, 2-n-propoxy cinnamate tert-butyl ester, 2-n-propoxy cinnamate tert-butyl ester, 2-ethylhexyl residue, 2-ethylhexyl residue, 2-n-butoxy methyl ester residue, ethyl 2-n-butoxy residue, 2-n-butoxy residue isopropyl residue, 2- butyl n-butoxy cinnamate n-propyl residue, 2-n-butoxy cinnamate n-butyl residue, 2-n-butoxy cinnamate sec- Butoxy cinnamic acid 2-ethylhexyl residue, 2-sec-butoxy methacrylic acid residue, 2-sec-butoxy methacrylic acid residue, 2-sec-butoxy methacrylic acid isopropyl residue, Butyl sec-butoxy cinnamate, a tert-butyl sec-2-sec-butoxy cinnamate, a 2-sec-butoxy cinnamic acid 2- , 2-tert-butoxyamino acid methyl residue, 2-tert-butoxy cinnamate Butyl ester of 2-tert-butoxy cinnamate, n-propyl residue of 2-tert-butoxy cinnamate, n-butyl residue of 2-tert-butoxy cinnamate, sec- , A tert-butyl residue of 2-tert-butoxy cinnamate, and a 2-ethylhexyl residue of 2-tert-butoxy sebacic acid.

In the present invention, when the cinnamic acid ester copolymer comprises an alkoxy cinnamic acid residue unit and a fumaric acid monoester residue unit, the cinnamic acid ester copolymer contains 5 to 50 mol% of a fumaric acid monoester residue unit represented by the following general formula (3) , 0 to 85 mol% of a fumaric acid diester residue unit represented by the following general formula (4) and 10 to 90 mol% of an alkoxy cinnamate residual group unit represented by the general formula (2) , 10 to 50 mol% of a fumaric acid monoester residue unit represented by the following general formula (3), 0 to 60 mol% of a fumaric acid diester residue unit represented by the following general formula (4) and an alkoxy cinnamate ester residue unit represented by a general formula (2) And most preferably contains mol%.

(41)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)

(42)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)

In the present invention, when the cinnamic acid ester copolymer contains an alkoxy cinnamic acid residue unit and the fumaric acid monoester residue unit is larger than 5 mol%, the resin is more excellent in compatibility. When the residual unit is from 5 to 50 mol%, the resin exhibits a high retardation property and is more excellent in compatibility.

In the present invention, when the cinnamic acid ester copolymer has a fumaric acid monoester residue unit represented by the general formula (3), R _{6, which} is an ester substituent of the residue unit, is an alkyl group having 1 to 12 carbon atoms and includes, for example, An ethyl group, a propyl group, an isopropyl group, an s-butyl group, a t-butyl group, an s-pentyl group, a t-pentyl group, Pentyl group, cyclohexyl group, and the like. Of these, methyl group, ethyl group, propyl group and butyl group, which are alkyl groups having 1 to 4 carbon atoms, are preferable from the viewpoint of compatibility with cellulose resin. The fumaric acid monoester residue unit represented by the general formula (3) includes, for example, monomethyl fumarate residue, monoethyl fumarate residue, mono-n-propyl fumarate residue, monoisopropyl fumarate residue, mono-n-butyl fumarate residue , Mono-tert-butyl fumarate residue, mono-t-butyl fumarate residue, mono-n-pentyl fumarate residue, mono-s-pentyl fumarate residue, mono-t-pentyl fumarate residue, Mono-t-hexyl residue, mono-t-hexyl residue, fumaric acid mono-2-ethylhexyl, fumaric acid monocyclopropyl residue, fumaric acid monocyclopentyl residue and monocyclohexyl fumarate residue. Of these, from the viewpoint of good compatibility with the cellulose resin, it is preferable to use a fumaric acid mono-n-butyl residue, a fumaric acid mono-n-butyl residue, a fumaric acid mono- Unit, a fumaric acid mono-s-butyl residue unit, and a fumaric acid mono-t-butyl residue unit are preferable.

In the present invention, when the cinnamic acid ester copolymer has a fumaric acid diester residue unit represented by the general formula (4), R ₇ and R _{8 which} are ester substituents of the residue unit are alkyl groups having 1 to 12 carbon atoms, , A methyl group, an ethyl group, a propyl group, an isopropyl group, an s-butyl group, a t-butyl group, an s- A cyclopentyl group, a cyclohexyl group, and the like. Of these, methyl group, ethyl group, propyl group and butyl group, which are alkyl groups having 1 to 4 carbon atoms, are preferable from the viewpoint of compatibility with cellulose resin. Examples of the fumaric acid diester residue unit represented by the general formula (4) include a fumaric acid dimethyl residue, a fumaric acid diethyl residue, a di-n-propyl fumarate residue, a diisopropyl fumarate residue, N-pentyl fumarate, di-t-pentyl fumarate, di-t-pentyl fumarate, di-n-hexyl fumarate, di-n-hexyl fumarate, -hexyl residue, a di-t-hexyl residue, a di-2-ethylhexyl residue, a dicyclohexyl fumarate residue, a dicyclopentyl residue of fumaric acid, and a dicyclohexyl residue of fumaric acid. Of these, from the viewpoint of polymerizability, phase retardation, and compatibility with the cellulose resin, it is preferable to select from a dimethyl fumarate moiety unit, a diethyl fumarate moiety unit, a diisopropyl fumarate moiety unit and a di-t-butyl fumarate moiety unit Is preferably a fumaric acid diester residue unit.

In the present invention, the cinnamic acid ester copolymer preferably contains a total of 5 to 50 mol% of fumaric acid monoester residue units, 0 to 80 mol% of fumaric acid diester residue units and 10 to 90 mol% of alkoxy cinnamic acid ester residue units And may contain 0 to 20% by mole of a residual unit of a monomer copolymerizable with cinnamic acid esters with 100% by mole of a monomer.

In the present invention, it is preferable that the cinnamic acid ester copolymer contains an alkoxy cinnamic acid residue unit, and the acrylic acid ester residue unit represented by the following formula (5), the methacrylic acid ester residue unit represented by the following formula (6) , An acrylamide residue unit represented by the following general formula (7), and a methacrylate amide residue unit represented by the following general formula (8), a fumaric acid diester residue unit represented by the general formula (4) (5), an acrylic acid ester residue unit represented by the following general formula (6), an acrylic acid amide residual unit represented by the following general formula (7), an acrylic acid ester residue unit represented by the following general formula , 5 to 40 mol% of a residual unit selected from the group consisting of methacrylic acid amide residue units represented by the following formula (8) And an alkoxy cinnamate ester residue unit represented by the general formula (2) in an amount of 10 to 90 mol%, particularly preferably 5 to 65 mol% of a fumaric acid diester residue unit represented by the general formula (4) (5), a methacrylate residue unit represented by the following formula (6), an acrylamide residue unit represented by the following formula (7), a methacrylate amide residue represented by the following formula (8) , And most preferably 30 to 90 mol% of the alkoxy cinnamate ester residue unit represented by the general formula (2).

(43)

(44)

[Chemical Formula 45]

(46)

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)

In the present invention, when the cinnamic acid ester copolymer contains an alkoxy cinnamic acid residue unit, it is preferable that the acrylic acid ester residue unit represented by the general formula (5), the methacrylic acid ester residue unit represented by the general formula (6) ) And a methacrylic acid amide residue unit represented by the general formula (8) is larger than 5 mol%, the resin becomes more excellent in compatibility. When the residual unit selected from these groups is 5 to 40 mol%, the resin exhibits a higher retardation property and is more excellent in compatibility. In the present invention, in the case where cinnamic acid ester copolymer contains a residue unit selected from these groups, when the fumaric acid diester residue unit represented by the general formula (4) is larger than 5% Resin.

In the present invention, it is preferable that the cinnamate ester copolymer contains an acrylic acid ester residue unit represented by the general formula (5), a methacrylate ester residue unit represented by the general formula (6), an acrylic acid amide residue unit represented by the general formula (7) And a methacrylic acid amide residue unit represented by the following formula (8), an ester substituent group of an acrylic acid ester residue unit, a methacrylic acid ester residue unit, an acrylamide residue unit or a methacrylic acid amide residue unit R ₉ , R ₁₀ , R ₁₁ and R ₁₂ , which are part of the alkyl group, are an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms, and examples thereof include a methyl (methylene) group, (T-butylene) group, an s-pentyl (s-pentylene) group, a t-pentyl (t-pentylene) group, Group, s-hexyl (s-hex (Cyclopentylene) group, cyclopentyl (cyclopentylene) group, cyclohexyl (cyclohexyl) group, cyclohexyl Butoxymethyl group, t-butoxymethyl group, methoxyethyl group, ethoxyethyl group, propoxy group, isopropoxy group, isopropoxy group, n-butoxymethyl group, An ethyl group, an isopropoxyethyl group, an n-butoxyethyl group, a s-butoxyethyl group, and a t-butoxyethyl group.

The cinnamic acid ester copolymer contains 5 to 85% by mole of a fumaric acid diester residue unit, an acrylic acid ester residue unit represented by the general formula (5), a methacrylic acid ester residue unit represented by the general formula (6) Acrylic acid amide residue units, methacrylic acid amide residue units, methacrylic acid amide residue units, methacrylic acid amide residue units, and alkoxy cinnamic acid ester residue units in an amount of 5 to 40 mol% and 10 to 90 mol% To 100 mol%, and 0 to 20 mol% of residual units of monomers copolymerizable with cinnamic acid esters.

Further, in the present invention, the cinnamic acid ester copolymer preferably contains 20% by mole or more of the fumaric acid diester residue unit represented by the general formula (4) when the benzene ring contains a cinnamate ester residue unit having an electron withdrawing substituent, and It is still more preferable that the polymer contains 5 mol% or more of the substituted cinnamate ester residue unit represented by the general formula (9) such as the p-substituted methacrylic ester residue unit represented by the following general formula (10).

(47)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.

In the present invention, when the cinnamic acid ester copolymer contains a p-substituted cinnamic acid ester residue unit represented by the general formula (10), when the fumaric acid diester residue unit accounts for 20 mol% or more, When the p-position substituted cinnamate ester residue unit is 5 mol% or more, the phase difference manifestation is further improved. That is, the present invention is a fumaric acid ester copolymer wherein the fumaric acid ester copolymer contains at least 20 mol% of fumaric acid diester residue units and further contains at least 5 mol% of the p-position substituted cinnamic acid ester residue units, When the resin composition according to the present invention is used as an optical compensation film, the Re is more improved.

R _{14, which} is an ester substituent of the p-position substituted cinnamate ester residue unit represented by the general formula (10), is an alkyl group having 1 to 12 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, an isopropyl group, -Butyl group, s-pentyl group, t-pentyl group, s-hexyl group, t-hexyl group, 2-ethylhexyl group, cyclopropyl group, cyclopentyl group and cyclohexyl group. Among them, methyl group, ethyl group, propyl group and butyl group which are an ester group having 1 to 4 carbon atoms are particularly preferable from the viewpoint of compatibility with a cellulose resin. The substituent X is a substituent contributing to the negative phase difference enhancement and is a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group. Examples of the p-position substituted cinnamic acid ester residue unit represented by the general formula (10) include a 4-nitro cinnamate methyl residue unit, a 4-nitro cinnamate ethyl residue unit, a 4-nitro cinnamate isopropyl residue unit, butyl naphthyl group, n-propyl residue unit, n-butyl residue unit of 4-nitro cinnamate, sec-butyl residue unit of 4-nitro cinnamate, tert- butyl residue unit of 4-nitro cinnamate, 2- Fluorosuccinic acid methyl residue unit, 4-fluoro cinnamic acid ethyl residue unit, 4-fluorosuccinic acid isopropyl residue unit, 4-fluoro cinnamic acid n-propyl residue unit, 4-fluoro cinnamic acid n-butyl residue unit, Methyl 4-chloroacetate, 4-chloromethylsulfate, 4-chloromethylacetate, 4-chloromethylacetate, 4-chloromethylacetate, Propyl residue unit, 4-claw Chlorosuccinic acid tert-butyl residue unit, 4-chloro cinnamic acid 2-ethylhexyl residue unit, 4-chloro capric acid n-butyl residue unit, Bromo cinnamate methyl residue unit, 4-bromo cinnamate ethyl residue unit, 4-bromo cinnamate isopropyl residue unit, 4-bromo cinnamate n-propyl residue unit, 4-bromo cinnamate n-butyl residue unit, 4 Bromo cinnamate tert-butyl residue unit, 4-bromo cinnamic acid 2-ethylhexyl residue unit, 4-iodo cinnamate methyl residue unit, 4-iodosuccinic acid ethyl residue unit, 4 Iodine cinnamate isopropyl residue unit, 4-iodosuccinic acid n-propyl residue unit, 4-iodo-n-butyl residue unit of cinnamate, sec-butyl residue unit of 4-iodohexadecanoate, tert- 2-ethylhexyl residue unit of iodine cinnamate, methyl residue of 4-cyano cinnamate , 4-cyanoacetic acid ethyl residue unit, 4-cyano cinnamic acid isopropyl residue unit, 4-cyano cinnamic acid n-propyl residue unit, 4-cyano cinnamic acid n-butyl residue unit, 4-cyano cinnamic acid sec- Butyl tertiary butyl unit, 4-cyano terphenyl tertiary butyl unit, 4-cyano cinnamic acid 2-ethyl hexyl residual unit, 4-sulfonic acid methyl tertiary unit, 4-sulfonic acid ethyl tertiary unit, Sulfonic acid n-propyl residue unit, 4-sulfonic acid n-butyl residue unit, 4-sulfonic acid sec-butyl residue unit, 4-sulfonic acid tert-butyl residue unit, 4-sulfonic acid 2-ethylhexyl cinnamate Carboxylic acid cinnamate isopropyl residue unit, 4-carboxylic acid cinnamate n-propyl residue unit, 4-carboxylic acid cinnamate n-butyl residue unit, 4- Butyl ester unit of carboxylic acid cinnamate, tert-butyl 4-carboxylic acid cinnamate 4-phenyl cinnamate acid ethyl residue unit, 4-phenyl cinnamic acid acid isomer residue unit, 4-phenyl cinnamic acid isopropyl residue unit, 4-phenyl cinnamic acid isopropyl residue unit, 4-phenyl cinnamic acid methyl residue unit P-substituted cinnamic acid ester residue selected from the group consisting of 4-phenyl cinnamic acid n-butyl residue unit, 4-phenyl cinnamic acid sec-butyl residue unit, 4-phenyl cinnamic acid tert- Unit.

In the present invention, when the cinnamic acid ester copolymer contains p-substituted cinnamic acid ester residue units represented by the general formula (10), the cinnamic acid ester copolymer is excellent in polymerizability and compatibility, and therefore, a fumaric acid diester A substituted cinnamic acid ester residue unit represented by the general formula (10), and 5 to 30% by mole of a fumaric acid monoester residue unit represented by the general formula (3). Especially preferred is an ester copolymer.

Further, in the present invention, it is preferable that the cinnamic acid ester copolymer contains a p-substituted cinnamic acid ester residue unit represented by the general formula (10), and when the fumaric acid diester residue unit is a fumaric acid diethyl residue unit, It is preferable that 20 to 90 mol% of the diethyl fumarate residue unit, 5 to 75 mol% of the p-substituted methacrylic ester residue unit represented by the general formula (10) and 5 to 75 mol% of the monomethyl fumarate ester represented by the general formula (3) And most preferably a cinnamate ester copolymer containing 5 to 30 mol% of ester residue units.

In the present invention, the cinnamic acid ester copolymer includes a p-substituted cinnamic acid ester residue unit represented by the general formula (10), and further includes an acrylic acid ester residue unit represented by the general formula (5) , A methacrylic acid amide residue unit represented by the general formula (7), and a methacrylic acid amide residue unit represented by the general formula (8) And the compound represented by the general formula (5) in terms of solubility and compatibility, the fumaric acid diester residue unit represented by the general formula (4) is 20 to 94.5 mol%, the p-substituted cinnamic acid ester residue unit represented by the general formula (10) , A methacrylic acid ester residue unit represented by the general formula (6), an acrylic acid ester residue unit represented by the general formula (7) A methacrylic acid amide residue unit represented by the general formula (8), and 0.5 to 30 mol% of a residue unit selected from the group consisting of a methacrylic acid amide residue unit represented by the general formula (8).

In the present invention, the cinnamic acid ester copolymer contains 100 mol% of a total monomer including a fumaric acid diester residue unit and a p-position substituted cinnamic acid ester residue unit represented by the general formula (10) in an amount of 100 mol% And 0 to 20% by mole of a residue unit of the polymer.

Examples of the residue unit of a monomer copolymerizable with cinnamic acid esters include acrylic acid residues such as styrene residues and? Methacrylic acid residues such as methacrylic acid residues, methacrylic acid methyl residues, ethyl methacrylate residues, and methacrylic acid butyl residues, vinyl acetate residues such as vinyl acetate residues and vinyl propionate residues, methyl vinyl ether N-substituted maleimide residues such as N-methylmaleimide residue, N-cyclohexylmaleimide residue and N-phenylmaleimide residue, acrylonitrile residue such as acrylonitrile Methacrylonitrile residue, methyl cinnamate residue, ethyl cinnamate residue, isopropyl cinnamate residue, cinnamic acid-n- A cinnamic acid residue, a cinnamic acid residue, an olefin residue such as an ethylene residue and a propylene residue, a vinylpyrrolidone residue, a vinylpyrrolidone residue, a vinylpyrrolidone residue, a vinylpyrrolidone residue, a vinylpyrrolidone residue, Pyridine residues, and the like.

Since the cinnamic acid ester copolymer has excellent mechanical properties and excellent moldability at the time of film formation, the cinnamic acid ester copolymer has a number-average molecular weight in terms of standard polystyrene obtained from an elution curve measured by gel permeation chromatography (GPC) Mn) is preferably 1 × 10 ³ to 5 × 10 ⁶ , and more preferably 5 × 10 ³ to 2 × 10 ⁵ .

The composition ratio of the cellulose resin and the cinnamate ester copolymer in the resin composition of the present invention is 30 to 99% by weight of the cellulose resin and 1 to 70% by weight of the cinnamate ester copolymer. When the cellulose based resin is less than 30% by weight (when the cinnamate ester copolymer is more than 70% by weight), or when the cellulose based resin is more than 99% by weight (when the cinnamate ester copolymer is less than 1% by weight) It is difficult to control the phase difference. Preferably, the cellulose resin is 30 to 90% by weight and the cinnamic acid ester copolymer is 10 to 70% by weight, more preferably 40 to 80% by weight of the cellulose resin and 20 to 60% by weight of the cinnamic acid ester copolymer.

The cinnamic acid ester copolymer may be produced by any method as long as the cinnamic acid ester copolymer is obtained.

In the present invention, in the case where the cinnamic acid ester copolymer contains a fumaric acid diester residue unit, a fumaric acid monoester residue unit, and an alkoxy cinnamate ester residue unit, the cinnamic acid ester copolymer may be produced, for example, by a fumaric acid monoester Fumaric acid diesters and alkoxy cinnamic acid esters, and in some cases, fumaric acid monoesters, fumaric acid diesters and alkoxy cinnamic acid esters in combination with a monomer capable of copolymerization, and conducting radical polymerization. Examples of the fumaric acid monoesters include monomethyl fumarate, monoethyl fumarate, mono-n-propyl fumarate, monoisopropyl fumarate, mono-n-butyl fumarate, mono-s-butyl fumarate, Mono-t-butyl, fumaric acid mono-t-butyl, fumaric acid mono-s-pentyl, fumaric acid mono-t-pentyl, Pentyl and monocyclohexyl fumarate. Examples of the fumaric acid diesters include dimethyl fumarate, diethyl fumarate, di-n-propyl fumarate, diisopropyl fumarate, di-n-butyl fumarate, Propyl fumarate, di-t-butyl fumarate, di-t-butyl fumarate, di-s-pentyl fumarate, di- Dicyclopentyl fumarate, dicyclopentyl fumarate , And dicyclohexyl fumarate. Examples of the alkoxy cinnamic acid esters include methyl 4-methoxy cinnamate, ethyl 4-methoxy cinnamate, isopropyl 4-methoxy cinnamate, 4-methoxy cinnamic acid propyl 4-methoxy cinnamate, n-butyl 4-methoxy cinnamate, sec-butyl 4-methoxy cinnamate, tert-butyl 4-methoxy cinnamate, 2-ethylhexyl 4-methoxy cinnamate, Ethoxy cinnamate, n-propyl 4-ethoxy cinnamate, n-butyl 4-ethoxy cinnamate, sec-butyl 4-ethoxyacetate, tert-butyl 4-ethoxy cinnamate, 2-ethylhexyl ethoxy cinnamate, methyl 4-isopropoxy cinnamate, ethyl 4-isopropoxy cinnamate, isopropyl 4-isopropoxy cinnamate, n-propyl 4-isopropoxy cinnamate, butyl 4-isopropoxycinnamate, tert-butyl 4-isopropoxycinnamate, 2-ethylhexyl 4-isopropoxycinnamate, methyl 4-n- 4-n-propoxy cinnamate, n-propyl 4-n-propoxy cinnamate, sec-butyl 4-n-propoxy cinnamate, 4- ethyl 4-n-butoxy methacrylate, ethyl 4-n-butoxy methacrylate, isopropyl 4-n-butoxy methacrylate, isopropyl 4-n-propyl methacrylate, n-propyl 4-n-butoxy methacrylate, n-butyl 4-n-butoxy methacrylate, sec-butyl 4-n-butoxy methacrylate, tert- butyl 4-n-butoxy methacrylate, 2-ethylhexyl, methyl 4-sec-butoxy methacrylate, ethyl 4-sec-butoxy methacrylate, isopropyl 4-sec-butoxy methacrylate, n-propyl 4-sec-butoxy methacrylate, Tert-butyl 4-sec-butoxy methacrylate, 2-ethylhexyl 4-sec-butoxy methacrylate, methyl 4-tert-butoxy methacrylate, 4- n-propyl 4-tert-butoxy methacrylate, ethyl 4-tert-butoxy methacrylate, isopropyl 4-tert-butoxy methacrylate, n- Tert-butyl 4-tert-butoxy methacrylate, 2-ethylhexyl 4-tert-butoxy methacrylate, methyl 3-methoxy cinnamate, ethyl 3-methoxy cinnamate, 3 Propyl 3-methoxy cinnamate, n-butyl 3-methoxy cinnamate, sec-butyl 3-methoxy cinnamate, tert-butyl 3-methoxy cinnamate, 3- Ethyl hexyl, methyl 3-ethoxy cinnamate, ethyl 3-ethoxy methacrylate, isopropyl 3-ethoxy methacrylate, n-propyl 3-ethoxy methacrylate, n-butyl 3-ethoxy methacrylate, Butyl 3-ethoxypropionate, tert-butyl 3-ethoxypropionate, 2-ethylhexyl 3-ethoxypropionate, methyl 3-isopropoxyate, ethyl 3-isopropoxyate, isopropyl 3- Butyl 3-isopropoxycinnamate, tert-butyl 3-isopropoxycinnamate, 2-ethylhexyl 3-isopropoxycinnamate, 3-n Methyl propoxy cinnamate, 3-n- 3-n-propoxy cinnamate, n-propyl 3-n-propoxy cinnamate, sec-butyl 3-n-propoxy cinnamate, 3- 3-n-butoxy propionate, 3-n-butoxy propionate, 3-n-butoxy propionate, 3-n-propoxy propionate, butyl 3-n-butoxy methacrylate, tert-butyl 3-n-butoxy methacrylate, 3-n-butoxy methacrylate, 2-ethylhexyl, methyl 3-sec-butoxy methacrylate, ethyl 3-sec-butoxy methacrylate, isopropyl 3-sec-butoxy methacrylate, n-propyl 3-sec-butoxy methacrylate, Tert-butyl 3-sec-butoxy methacrylate, 3-ethylhexyl 3-sec-butoxy methacrylate, methyl 3-tert-butoxy methacrylate, 3- isopropyl 3-tert-butoxy methacrylate, n-propyl 3-tert-butoxy methacrylate, n-butyl 3-tert-butoxy methacrylate Tert-butyl 3-tert-butoxy methacrylate, 2-ethylhexyl 3-tert-butoxy methacrylate, methyl 2-methoxy cinnamate, ethyl 2-methoxy cinnamate, 2 Methoxy cinnamate isopropyl, n-propyl 2-methoxy cinnamate, n-butyl 2-methoxy cinnamate, sec-butyl 2-methoxy cinnamate, tert- butyl 2-methoxy cinnamate, 2- Ethyl hexyl, methyl 2-ethoxy cinnamate, ethyl 2-ethoxy methacrylate, isopropyl 2-ethoxy methacrylate, n-propyl 2-ethoxy methacrylate, n-butyl 2-ethoxy methacrylate, sec- Butyl propionate, tert-butyl 2-ethoxy propionate, 2-ethylhexyl 2-ethoxy propionate, methyl 2-isopropoxycinnamate, ethyl 2-isopropoxy cinnamate, isopropyl 2-isopropoxy cinnamate, 2-isopropyloxycinnamate, n-propyl 2-isopropoxycinnamate, sec-butyl 2-isopropoxycinnamate, tert-butyl 2-isopropoxycinnamate, 2-ethylhexyl 2- Methyl propoxy cinnamate, 2-n- 2-n-propoxycinnamate, n-propyl 2-n-propoxycinnamate, sec-butyl 2-n-propoxycinnamate, 2- 2-ethylhexyl n-propoxy cinnamate, 2-ethylhexyl 2-n-propoxy cinnamate, methyl 2-n-butoxy cinnamate, ethyl 2-n-butoxy methacrylate, isopropyl 2-n- n-propyl 2-n-butoxy methacrylate, n-butyl 2-n-butoxy methacrylate, sec-butyl 2-n-butoxy methacrylate, 2-ethylhexyl, methyl 2-sec-butoxy methacrylate, ethyl 2-sec-butoxy methacrylate, isopropyl 2-sec-butoxy methacrylate, n-propyl 2-sec-butoxy methacrylate, Butyl sec-butyl cinnamate, sec-butyl 2-sec-butoxy cinnamate, tert-butyl 2-sec-butoxy cinnamate, 2-ethylhexyl 2-sec-butoxy cinnamate, methyl 2-tert- ethyl 2-tert-butoxy methacrylate, isopropyl 2-tert-butoxy methacrylate, n-propyl 2-tert-butoxy methacrylate, n- Sec-butyl 2-tert-butoxyacetate, tert-butyl 2-tert-butoxyacetate, and 2-ethylhexyl 2-tert-butoxyacetate. Examples of the monomer copolymerizable with fumaric acid monoesters, fumaric acid diesters and alkoxy cinnamic acid esters include styrenes such as styrene and? -Methylstyrene; acrylic acid; acrylic acid esters such as methyl acrylate, ethyl acrylate and butyl acrylate Methacrylic acid esters such as methacrylic acid, methyl methacrylate, ethyl methacrylate and butyl methacrylate, vinyl esters such as vinyl acetate and vinyl propionate, vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether Substituted maleimides such as N-methylmaleimide, N-cyclohexylmaleimide and N-phenylmaleimide; acrylonitrile; methacrylonitrile; methyl cinnamate, ethyl cinnamate, isopropyl cinnamate, Cinnamic acid esters such as n-propyl cinnamate, n-propyl cinnamate, n-butyl butyl cinnamate, s-butyl butyl cinnamate and t-butyl cinnamate; cinnamic acid; Repin like; it can be given alone or in combination of two or more, such as vinyl pyridine; vinylpyrrolidone.

In the present invention, in the case where the cinnamic acid ester copolymer contains a fumaric acid diester residue unit and a p-position substituted cinnamic acid ester residue unit represented by the general formula (10), the cinnamic acid ester copolymer may be produced, for example, Dicarboxylic acid diesters and p-position substituted cinnamic acid esters represented by the general formula (10), and optionally, fumaric acid diesters and monomers copolymerizable with the p-position substituted cinnamic acid esters are used in combination and subjected to radical polymerization have. Examples of the p-position substituted cinnamic acid esters include methyl 4-nitro cinnamate, ethyl 4-nitro cinnamate, isopropyl 4-nitro cinnamate, n-propyl 4-nitro cinnamate, n-butyl 4-nitro cinnamate, Nitrohexanoate, 2-ethylhexyl 4-nitro cinnamate, methyl 4-fluoro cinnamate, ethyl 4-fluoroacetate, isopropyl 4-fluoro cinnamate, 4-fluoro Butyl 4-fluoroacetate, tert-butyl 4-fluoroacetate, 2-ethylhexyl 4-fluoroacetate, methyl 4-chloro cinnamate, 4- Ethyl chloroformate, isopropyl 4-chloro cinnamate, n-propyl 4-chloro cinnamate, n-butyl 4-chloro cinnamate, sec-butyl 4-chloropropionate, tert- butyl 4-chloro- Hexyl, methyl 4-bromo cinnamate, ethyl 4-bromo cinnamate, isopropyl 4-bromo cinnamate, n-propyl 4-bromo cinnamate, Butyl 4-bromoacetate, tert-butyl 4-bromoacetate, 2-ethylhexyl 4-bromoacetate, methyl 4-iodoateate, ethyl 4-iodoateate, iso-4- Propyl 4-iodoacetate, n-butyl 4-iodate, n-butyl 4-iodate, sec-butyl 4-iodate, tert- butyl 4-iodoate, 2- Butyl 4-cyanoacetate, tert-butyl 4-cyanoacetate, ethyl 4-cyanoacetate, isopropyl 4-cyanoacetate, n-propyl 4-cyanoacetate, n-butyl 4-cyanoacetate, , 4-cyanoacetic acid 2-ethylhexyl, 4-sulfonic acid methyl ester, 4-sulfonic acid ethyl ester, 4-sulfonic acid isopropyl ester, 4-sulfonic acid n-propyl 4-sulfonate, n-butyl 4-sulfonic acid, tert-butyl 4-sulfonic acid cinnamate, 2-ethylhexyl 4-sulfonic acid cinnamate, ethyl 4-carboxylic acid cinnamate, isopropyl 4-carboxylic acid cinnamate, n- Butyl, 4-carboxylic acid tert-butyl 4-carboxylic acid, 2-ethylhexyl 4-carboxylic acid, methyl 4-phenyl cinnamate, 4 4-phenyl cinnamate, n-butyl 4-phenyl cinnamate, sec-butyl 4-phenyl cinnamate, tert-butyl 4-phenyl cinnamate, 2- Ethylhexyl and the like. When fumaric acid monoesters are used as the copolymerizable monomers, examples of the fumaric acid monoesters include monomethyl fumarate, monoethyl fumarate, mono-n-propyl fumarate, monoisopropyl fumarate, mono-fumarate, mono-t-butyl fumarate, mono-n-pentyl fumarate, mono-s-pentyl fumarate, mono-n-hexyl fumarate mono-t-pentyl fumarate, mono-s-butyl fumarate, Hexyl fumarate, mono-t-hexyl fumarate, mono-2-ethylhexyl fumarate, monocyclopropyl fumarate, monocyclopentyl fumarate, and monocyclohexyl fumarate. Examples of other copolymerizable monomers used in the radical polymerization in the present invention include styrenes such as styrene and? -Methylstyrene; acrylic acid esters such as acrylic acid esters such as methyl acrylate, ethyl acrylate and butyl acrylate; Methacrylic acid, methacrylic acid, methacrylic acid esters such as methyl methacrylate, ethyl methacrylate and butyl methacrylate, vinyl esters such as vinyl acetate and vinyl propionate, acrylonitrile, methacrylonitrile, methyl cinnamate , Cinnamic acid esters such as ethyl cinnamate and propyl cinnamate, cinnamic acid, olefins such as ethylene and propylene, vinyl pyrrolidone, vinyl pyridine, and the like.

As the radical polymerization method, for example, bulk polymerization, solution polymerization, suspension polymerization, precipitation polymerization, emulsion polymerization and the like can be employed.

Examples of the polymerization initiator in the radical polymerization include benzoyl peroxide, lauryl peroxide, octanoyl peroxide, acetyl peroxide, di-t-butyl peroxide, t-butyl cumyl peroxide, (2,4-dimethylvaleronitrile), 2,2'-azobis (2,4-dimethylvaleronitrile), and the like, and organic peroxides such as 2,5-dimethyl- Azobis (2-butyronitrile), 2,2'-azobisisobutyronitrile, dimethyl-2,2'-azobisisobutyrate, 1,1'-azobis (cyclohexane-1-carbonyl Trityl), and the like.

There are no particular restrictions on the solvent which can be used in the solution polymerization method or the precipitation polymerization method, and examples thereof include aromatic solvents such as benzene, toluene and xylene; alcohol solvents such as methanol, ethanol, propyl alcohol and butyl alcohol; Cyclohexane, dioxane, tetrahydrofuran, acetone, methyl ethyl ketone, dimethyl formamide, isopropyl acetate and the like, and mixed solvents thereof.

 The polymerization temperature at the time of conducting the radical polymerization can be appropriately set in accordance with the decomposition temperature of the polymerization initiator, and it is generally preferably carried out at a temperature in the range of 30 to 150 ° C.

The resin composition of the present invention may contain an antioxidant to improve the thermal stability. Examples of the antioxidant include antioxidants such as hindered phenol antioxidants, phosphorus antioxidants, sulfur antioxidants, lactone antioxidants, amine antioxidants, hydroxylamine antioxidants, vitamin E antioxidants, and other antioxidants These antioxidants may be used singly or in combination of two or more kinds.

The resin composition of the present invention may contain a hindered amine light stabilizer or an ultraviolet absorber to improve weather resistance. Examples of the ultraviolet absorber include benzotriazole, benzophenone, triazine, benzoate, and the like.

The resin composition of the present invention may be added to a compound known as a so-called plasticizer for the purpose of improving mechanical properties, imparting flexibility, imparting water absorbency, reducing water vapor permeability, and adjusting retardation. Examples of the plasticizer include phosphoric acid Esters and carboxylic acid esters. An acrylic polymer or the like is also used. Examples of the phosphoric ester include triphenyl phosphates, tricresyl phosphates, phenyl diphenyl phosphates, and the like. Examples of the carboxylic acid esters include phthalic acid esters and citric acid esters. Examples of the phthalic acid esters include dimethyl phthalate, diethyl phthalate, dicyclohexyl phthalate, dioctyl phthalate and diethylhexyl phthalate, , Acetyltriethyl citrate and acetyl tributyl citrate. In addition, butyl oleate, methylacetyl ricinoleate, dibutyl sebacate, triacetin, trimethylolpropane tribenzoate and the like may be mentioned. Alkyl phthalyl alkyl glycolates are also used for this purpose. The alkyl of alkyl phthalyl alkyl glycolate is an alkyl group having 1 to 8 carbon atoms. Examples of the alkyl phthalyl alkyl glycolate include methyl phthalyl methyl glycolate, ethyl phthalyl ethyl glycolate, propyl phthalyl propyl glycolate, butyl phthalyl butyl glycolate, octyl phthalyl octyl glycolate, methyl phthalyl ethyl glycolate , Ethyl phthalyl methyl glycolate, ethyl phthalyl propyl glycolate, propyl phthalyl ethyl glycolate, methyl phthalyl propyl glycolate, methyl phthalyl butyl glycolate, ethyl phthalyl butyl glycolate, butyl phthalyl methyl glycolate, Butyl phthalyl ethyl glycolate, propyl phthalyl butyl glycolate, butyl phthalyl propyl glycolate, methyl phthalyl octyl glycolate, ethyl phthalyl octyl glycolate, octylphthalyl methyl glycolate, octylphthalyl ethyl glycolate, . Two or more of these plasticizers may be used in combination.

For the purpose of adjusting the retardation, the resin composition of the present invention may contain an aromatic hydrocarbon ring or an additive having an aromatic heterocyclic ring. The birefringence Δn represented by the following formula (A) of the additive used for the purpose of adjusting the retardation is not particularly limited, but is preferably 0.05 or more, more preferably 0.05 or more, in view of obtaining an optical compensation film having excellent optical properties To 0.5, particularly preferably 0.1 to 0.5. Δn of the additive can be obtained by molecular orbital calculation.

? N = ny - nx (A)

(Wherein nx represents the refractive index in the fast axis direction of the additive molecule and ny represents the refractive index in the slow axis direction of the additive molecule).

When the resin composition of the present invention contains an aromatic hydrocarbon ring or an additive having an aromatic heterocyclic ring, the additive having an aromatic hydrocarbon ring or aromatic heterocyclic ring in the resin composition of the present invention may be an aromatic hydrocarbon ring or an aromatic hetero ring The number of molecules in the ring is not particularly limited, but is preferably 1 to 12, and more preferably 1 to 8, from the viewpoint of obtaining an optical compensation film having excellent optical characteristics. Examples of the aromatic hydrocarbon ring include a condensed ring composed of, for example, a five-membered ring, a six-membered ring, a seven-membered ring, or two or more aromatic rings, and examples of the aromatic heterocyclic ring include furan ring , Thiophene ring, pyrrole ring, oxazole ring, thiazole ring, imidazole ring, triazole ring, pyridine ring, pyrimidine ring, pyrazine ring and 1,3,5-triazine ring.

The aromatic hydrocarbon ring or the aromatic heterocycle may have a substituent and examples of the substituent include a hydroxyl group, an ether group, a carbonyl group, an ester group, a carboxylic acid residue, an amino group, an imino group, an amide group, Nitro group, sulfonyl group, sulfonic acid residue, phosphonyl group, phosphonic acid residue and the like.

Examples of the additive having an aromatic hydrocarbon ring or an aromatic heterocyclic ring used in the present invention include tricresyl phosphate, tripylenolyl phosphate, triphenylpostate, 2-ethylhexyldiphenyl phosphate, cresyldiphenyl phosphate , Bisphenol A bis (diphenyl phosphate), and other phosphoric acid ester compounds such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dihexyl phthalate, dinormal octyl phthalate, 2-ethylhexyl phthalate, diisooctyl phthalate, , Phthalic acid ester compounds such as dinonyl phthalate, diisononyl phthalate, didecyl phthalate, and diisodecyl phthalate; organic acid compounds such as tributyl trimellitate, tri-n-hexyl trimellitate, tri (2-ethylhexyl) trimellitate, Tri-n-octyltrimellitate, tri-isooctyltrimellitate, (2-ethylhexyl) pyromellitate, tetrabutyl pyromellitate, tetra-n-hexyl pyromellitate, tetra (2-ethylhexyl) pyro Pyromellitic acid ester-based compounds such as melitoate, tetra-n-octyl pyromellitate, tetra-iso octyl pyromellitate and tetra-isodecyl pyromellitate; benzoic acid such as ethyl benzoate, isopropyl benzoate and ethyl paroxybenzoate Ester compounds such as salicylic acid ester compounds such as phenyl salicylate, p-octylphenyl salicylate and p-tert-butylphenyl salicylate, methyl phthalyl ethyl glycolate, ethyl phthalyl ethyl glycolate, butyl phthalyl (2'-hydroxy-5'-t-butylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t -Butylphenyl) Benzotriazole-based compounds such as benzotriazole, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,4-dihydroxybenzophenone, Benzophenone compounds such as 2 ', 4,4'-tetrahydroxybenzophenone and 2-hydroxy-4-methoxy-5-sulfobenzophenone, sulfonamide compounds such as N-benzenesulfonamide, (2-hydroxy-4-methoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2- Triazine, 2,4-diphenyl- (2-hydroxy-4-propoxyphenyl) -1,3,5-triazine, 2,4- 4-butoxyphenyl) -1,3,5-triazine, and the like, and from the viewpoint of compatibility with the resin, tricresyl phosphate, 2-ethylhexyldiphenyl Phosphate, 2-hydroxy-4-methoxybenzophenone, and 2,2 ', 4,4'-tetrahydroxybenzophenone, 1 may be used either alone or in combination of two or more.

When the resin composition of the present invention contains an aromatic hydrocarbon ring or an aromatic heterocyclic ring-containing additive, the aromatic hydrocarbon ring or the aromatic heterocycle in the resin composition of the present invention Is 0.01 to 30% by weight (the above resin component: 70 to 99.99% by weight), more preferably 0.01 to 20% by weight, particularly preferably 0.01 to 15% by weight.

The resin composition of the present invention may contain other polymers, surfactants, polymer electrolytes, conductive complexes, pigments, dyes, antistatic agents, anti-blocking agents, slip agents and the like within the scope of the present invention.

The resin composition of the present invention can be obtained by blending a cellulose resin and a cinnamate ester copolymer.

As the blending method, methods such as melt blending and solution blending can be used. The melt-blending method in the case where an additive having an aromatic hydrocarbon ring or an aromatic heterocycle is contained in the resin composition of the present invention is a method in which an additive having an aromatic hydrocarbon ring or an aromatic hetero ring is melted by heating and then kneaded . The solution blending method is a method in which a resin and an additive having an aromatic hydrocarbon ring or aromatic hetero ring are dissolved in a solvent and blended. Examples of the solvent used in the solution blend include chlorinated solvents such as methylene chloride and chloroform; aromatic solvents such as toluene and xylene; alcohols such as acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, Solvents; ether solvents such as dioxane and tetrahydrofuran; dimethylformamide; and N-methylpyrrolidone. It is also possible to dissolve each resin and an additive having an aromatic hydrocarbon ring or an aromatic heterocyclic ring in a solvent and then blend them, and the powder, pellets or the like of each resin may be kneaded and dissolved in a solvent. The obtained blend resin solution can be added to a poor solvent to precipitate the resin composition, or it can be used in the production of an optical compensation film in the form of a blend resin solution.

The optical compensation film using the resin composition of the present invention preferably has a thickness of 5 to 200 占 퐉, more preferably 10 to 100 占 퐉, more preferably 20 to 80 占 퐉, from the viewpoints of handling properties of the film and thinning of the optical member. Mu m is particularly preferable, and 20 mu m to 60 mu m is most preferable.

The retardation characteristics of the optical compensation film using the resin composition of the present invention are different depending on the objective optical compensation film. For example, 1) the in-plane retardation (Re) represented by the following formula (1) More preferably 100 to 300 nm, particularly preferably 100 to 280 nm, the Nz coefficient represented by the following formula (2) is preferably 0.35 to 0.65, more preferably 0.45 to 0.55, and 2 ) Has an in-plane retardation (Re) of preferably 50 to 200 nm, more preferably 80 to 160 nm, an Nz coefficient of preferably -0.2 to 0.2, more preferably -0.1 to 0.1, and 3) The out-of-plane retardation (Rth) represented by the following formula (3) is preferably -150 to 20 nm, more preferably -150 to 20 nm, more preferably 0 to 5 nm, To 10 nm, and particularly preferably from -120 to 0 nm And the like. The retardation characteristic at this time is measured under the condition of a measurement wavelength of 589 nm using a fully automatic birefringence system (trade name: KOBRA-21ADH, manufactured by Oji Measurement Instruments Co., Ltd.).

These have retardation characteristics that are difficult to be expressed in an optical compensation film made of a conventional cellulose-based resin.

Re = (ny - nx) xd (1)

Nz = (ny - nz) / (ny - nx) (2)

Rth = [(nx + ny) / 2 - nz] xd (3)

(Where nx represents the refractive index in the fast axis direction in the film plane, ny represents the refractive index in the slow axis direction in the film plane, nz represents the refractive index outside the film surface, and d represents the film thickness).

The wavelength dispersion property of the optical film of the present invention is preferably in the range of 0.60 &lt; Re (450) / Re (550) &lt; 1.05, more preferably 0.61 &lt; Re (450) / Re ) &Lt; 1.02, and particularly preferably 0.61 &lt; Re (450) / Re (550) &lt;

When cellulose ether is used as the cellulose-based resin of the present invention, an optical film with low wavelength dispersion can be provided alone. A resin composition obtained by blending a cinnamate ester copolymer showing negative birefringence with respect to the stretching direction in this film can provide an optical film exhibiting generally reverse wavelength dispersion properties.

It is difficult to satisfy these retardation characteristics and wavelength dispersion characteristics simultaneously in an optical compensation film using a conventional cellulose resin. However, in the case of using cellulose ether in the present invention, The compensation film satisfies these characteristics at the same time.

The optical compensation film of the present invention has a retardation at 589 nm and a film thickness ratio Re (589) (nm) / film thickness (μm) of 4.0 nm / 탆 or more in order to reduce the required film thickness desirable.

The optical compensation film of the present invention preferably has a light transmittance of 85% or more, more preferably 90% or more, for improvement of brightness.

The optical compensation film of the present invention has a haze of preferably 1% or less, more preferably 0.5% or less, for the purpose of improving the contrast.

As a method for producing an optical compensation film using the resin composition of the present invention, an optical compensation film excellent in optical characteristics, heat resistance, surface characteristics, etc. , It is preferable to produce it by a solution casting method. Here, the solution cast method is a method in which a resin solution (generally referred to as a dope) is cast on a support substrate and then heated to evaporate the solvent to obtain an optical compensation film. As a flexible method, for example, a T-die method, a doctor blade method, a bar coater method, a roll coater method and a lip coater method are used, and industrially, the dope from the die is supported in a belt- A method of continuously pushing them to the substrate is generally used. As the supporting substrate to be used, for example, a glass substrate, a metal substrate such as stainless steel or ferrotype, or a plastic substrate such as polyethylene terephthalate may be used. To industrially continuously form a substrate having a high surface property and an excellent optical homogeneity, a metal substrate having a mirror finished surface is preferably used. When producing an optical compensation film having excellent thickness precision and surface smoothness in a solution casting method, the viscosity of the resin solution is a very important factor, and the viscosity of the resin solution depends on the concentration of the resin, the molecular weight, and the type of the solvent.

The resin solution for producing the optical compensation film using the resin composition of the present invention is prepared by dissolving the cellulose resin and the cinnamate ester copolymer in a solvent. The viscosity of the resin solution can be adjusted by the molecular weight of the polymer, the concentration of the polymer, and the type of the solvent. The viscosity of the resin solution is not particularly limited, but is preferably 100 to 10000 cps, more preferably 300 to 5000 cps, particularly preferably 500 to 3000 cps in order to facilitate film coating.

Examples of the method for producing an optical compensation film using the resin composition of the present invention include a method in which 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer, Is dissolved in a solvent, the resultant resin solution is cast on a substrate, dried, and then peeled off from the substrate.

(48)

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.)

The optical compensation film obtained using the resin composition of the present invention is preferably uniaxially stretched or unbalanced biaxially stretched to express the in-plane retardation (Re). Examples of a method of stretching the optical compensation film include a longitudinal uniaxial stretching method by roll stretching, a transverse uniaxial stretching method by tenter stretching, a uniaxial biaxial stretching method and a unbalance simultaneous biaxial stretching method by combination thereof Can be used. In the present invention, the retardation characteristics can be expressed without using a special stretching method of stretching under the action of the shrinking force of the heat shrinkable film.

The thickness of the optical compensation film at the time of stretching is preferably 10 to 200 탆, more preferably 30 to 150 탆, still more preferably 30 to 100 탆, particularly preferably 30 to 100 탆, from the viewpoints of easiness of stretching treatment and suitability for thinning of optical members desirable.

The stretching temperature is not particularly limited, but is preferably 50 to 200 占 폚, more preferably 100 to 180 占 폚 in that good retardation characteristics are obtained. The stretching magnification of uniaxial stretching is not particularly limited, but is preferably 1.05 to 4.0 times, more preferably 1.1 to 3.5 times, from the viewpoint of obtaining good retardation characteristics. The stretching ratio of the unbalanced biaxial stretching is not particularly limited, but is preferably 1.05 to 4.0 times in the longitudinal direction, more preferably 1.1 to 3.5 times in the longitudinal direction in view of obtaining an optical compensation film having excellent optical properties, , It is preferably 1.01 to 1.2 times in the width direction, and more preferably 1.05 to 1.1 times in the width direction. The in-plane retardation Re can be controlled by the stretching temperature and the stretching magnification.

The optical compensation film using the resin composition of the present invention can be laminated with a film containing another resin as necessary. Other resins include, for example, polyether sulfone, polyarylate, polyethylene terephthalate, polynaphthalene terephthalate, polycarbonate, cyclic polyolefin, maleimide resin, fluorine resin, polyimide and the like. It is also possible to laminate a hard coat layer or a gas barrier layer.

Effects of the Invention

The optical compensation film using the resin composition of the present invention is a thin film and exhibits specific retardation characteristics, and therefore is useful as an optical compensation film for a liquid crystal display and an antireflection film.

Example

Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to these examples.

 In addition, various physical properties shown by the examples were measured by the following methods.

&Lt; Analysis of Polymer &

Structural analysis of the polymer was determined by proton nuclear magnetic resonance spectroscopy ( ¹ H-NMR) spectrum analysis using a nuclear magnetic resonance measurement apparatus (manufactured by Nippon Denshi Co., Ltd., trade name: JNM-GX270).

In the case where the polymer contains fumaric acid monoester residue units and when it is difficult to analyze the composition ratio from the ¹ H-NMR spectrum analysis, the fumaric acid monoester concentration in accordance with JIS K 2501 (2003 edition) petroleum products and lubricating oil- Respectively.

&Lt; Measurement of number average molecular weight &

Was prepared by using a gel permeation chromatography (GPC) apparatus (manufactured by Toso, trade name: C0-8011 (column GMH _HR- H equipped)) and using tetrahydrofuran or dimethylformamide as a solvent at 40 ° C And measured as a standard polystyrene conversion value.

<Measurement of light transmittance and haze of optical compensation film>

The light transmittance and the haze of the prepared film were measured using a haze meter (trade name: NDH2000, manufactured by Nippon Denko Kagaku Kogyo K.K.), the measurement of the light transmittance was carried out according to JIS K 7361-1 (1997 edition) and the measurement of haze was made according to JIS K 7136 2000 edition), respectively.

&Lt; Measurement of retardation property &

The retardation characteristics of the optical compensation film were measured using a light of wavelength 589 nm using a specimen-type automatic birefringence meter (trade name: KOBRA-WR manufactured by Oji Scientific Instruments).

&Lt; Measurement of wavelength dispersion characteristics &gt;

The ratio of the retardation Re (450) by the light of 450 nm wavelength and the retardation Re (550) by the light of 550 nm wavelength was measured using a specimen tilting automatic birefringence meter (trade name: KOBRA-WR) The wavelength dispersion characteristics of the optical compensation film were measured.

Synthesis Example 1 (Synthesis of cinnamate ester copolymer (monoethyl fumarate / ethyl 4-methoxy cinnamate copolymer) 1)

12 g of monoethyl fumarate, 37 g of ethyl 4-methoxy cinnamate and 1.40 g of 2,5-dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane as a polymerization initiator were placed in a glass ampule having a capacity of 75 ml , Followed by nitrogen substitution and depressurization, followed by melting in a reduced pressure state. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of methanol / water = 50/50 (weight% / weight%) and precipitated and washed with 2 kg of methanol / water = 50/50 (weight% / weight% And then vacuum-dried for a time to obtain 23 g of a monoethyl fumarate / ethyl 4-methoxy cinnamate copolymer. The number-average molecular weight of the obtained polymer was 31,000, the monoethyl fumarate residue unit was 40 mol%, and the 4-methoxy ethyl acrylate residue was 60 mol%.

Synthesis Example 2 (synthesis of cinnamate ester copolymer (monoethyl fumarate / diisopropyl fumarate / methyl 4-ethoxy cinnamate) 2)

In a glass ampule having a capacity of 75 ml, 6.3 g of monoethyl fumarate, 15 g of diisopropyl fumarate, 29 g of methyl 4-ethoxy cinnamate and 25 g of 2,5-dimethyl-2,5-di (2-ethylhexanoylper Oxy) hexane (1.48 g) were added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into 2 kg of methanol / water = 60/40 (weight% / weight%) and precipitated. After washing with 2 kg of methanol / water = 60/40 (weight% / weight) And then vacuum-dried for a time to obtain 31 g of a monoethyl fumarate / diisopropyl fumarate / methyl 4-ethoxy methacrylate copolymer. The obtained polymer had a number average molecular weight of 38,000, a monoethyl fumarate residue unit of 22 mol%, a diisopropyl fumarate residue unit of 40 mol% and a 4-ethoxy divinyl methyl residue unit of 38 mol%.

Synthesis Example 3 (synthesis of cinnamate ester copolymer (monoisopropyl fumarate / diethyl fumarate / isopropyl copolymer of 4-methoxy cinnamate) 3)

4.3 g of monoisopropyl fumarate, 13 g of diethyl fumarate, 33 g of isopropyl 4-methoxy cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl Peroxy) hexane (1.46 g) was charged, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 DEG C and maintained for 10 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into methanol / water = 60/40 (weight% / weight%) and precipitated. The polymer solution was washed with 2 kg of methanol / water = 60/40 (weight% / weight) And dried to obtain 29 g of a monoisopropyl fumarate / diethyl fumarate / isopropyl 4-methoxy cinnamate copolymer. The number-average molecular weight of the obtained polymer was 33,000, the monoisopropyl fumarate residue unit was 16 mol%, the diethyl fumarate residue unit was 41 mol%, and the 4-methoxy isoamyl isopropyl residue unit was 43 mol%.

Synthesis Example 4 (synthesis of cinnamate ester copolymer (monoethyl fumarate / diethyl fumarate / ethyl 4-methoxy cinnamate) 4)

1.0 g of monoethyl fumarate, 11 g of diethyl fumarate, 39 g of ethyl 4-methoxy cinnamate, and 25 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxy ) Hexane (1.43 g) were added, and the pressure and the pressure were repeatedly changed. This ampoule was placed in a thermostatic chamber at 60 DEG C and maintained for 10 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into methanol / water = 60/40 (weight% / weight%) and precipitated. The polymer solution was washed with 2 kg of methanol / water = 60/40 (weight% / weight) And dried to obtain 27 g of a monoethyl fumarate / diethyl ethyl fumarate / ethyl 4-methoxy cinnamate copolymer. The obtained polymer had a number average molecular weight of 33,000, a monoethyl fumarate residue unit of 4.5 mol%, a diethyl fumarate residue unit of 35.5 mol%, and a 4-methoxy divinyl acid residue group of 60 mol%.

Synthesis Example 5 (synthesis of cinnamate ester copolymer (monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer) 5)

5.0 g of monoethyl fumarate, 38 g of diisopropyl fumarate, 7.3 g of n-propyl 4-methoxy cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.46 g) were added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into methanol / water = 70/30 (weight% / weight%) and precipitated. The polymer solution was washed with 2 kg of methanol / water = 70/30 (weight% / weight) And dried to obtain 24 g of monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer. The obtained polymer had a number average molecular weight of 31,000, a monoethyl fumarate residue unit of 13 mol%, a diisopropyl fumarate residue unit of 72 mol%, and a 4-methoxy cinnamic acid n-propyl residue unit of 15 mol%.

Synthesis Example 6 (synthesis of cinnamate ester copolymer (monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer) 6)

1.6 g of monoethyl fumarate, 4.8 g of diisopropyl fumarate, 44 g of n-propyl 4-methoxy cinnamate and 25 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.18 g) were charged, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 60 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was dropped into hexane, precipitated, washed with 2 kg of hexane, and then vacuum-dried at 80 DEG C for 10 hours to obtain 11 g of monoisopropyl fumarate / diisopropyl fumarate / n-propyl 4-methoxycinnamate copolymer . The obtained polymer had a number average molecular weight of 36,000, a monoethyl fumarate residue unit of 7 mol%, a diisopropyl fumarate residue unit of 11 mol%, and a 4-methoxy cinnamic acid n-propyl residue unit of 82 mol%.

Synthesis Example 7 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-methoxy cinnamate) 7)

10 g of diisopropyl fumarate, 5.0 g of N- (n-butoxymethyl) acrylamide, 35 g of ethyl 4-methoxy cinnamate, and 5 g of 2,5-dimethyl-2,5- 1.44 g of di (2-ethylhexanoylperoxy) hexane was added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into 2 kg of methanol / water = 60/40 (weight% / weight%) and precipitated. After washing with 2 kg of methanol / water = 60/40 (weight% / weight) And then vacuum-dried for a time to obtain 24 g of diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-methoxy cinnamate copolymer. The resulting polymer had a number average molecular weight of 24,000, a diisopropyl fumarate residue unit of 35 mol%, an N- (n-butoxymethyl) acrylamide residue unit of 15 mol%, and a 4-methoxy divinyl acid residue unit of 50 mol%.

Synthesis Example 8 (synthesis of cinnamate ester copolymer (diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-methoxy cinnamate copolymer) 8)

In a glass ampule having a capacity of 75 ml, 9.3 g of diethyl fumarate, 3.7 g of 2-hydroxyethyl acrylate, 37 g of ethyl 4-methoxy cinnamate and 25 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.52 g) were added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into 2 kg of methanol / water = 60/40 (weight% / weight%) and precipitated. After washing with 2 kg of methanol / water = 60/40 (weight% / weight) And then vacuum-dried for a time to obtain 22 g of diethyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy methacrylate copolymer. The obtained polymer had a number average molecular weight of 22,000, a diethyl fumarate unit of 36 mol%, a 2-hydroxyethyl methacrylate residue unit of 14 mol%, and a 4-methoxy divinyl acid residue unit of 50 mol%.

Synthesis Example 9 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy cinnamate ethyl copolymer) 9)

23 g of diisopropyl fumarate, 2.3 g of 2-hydroxyethyl acrylate, 25 g of ethyl 4-methoxy cinnamate and 25 g of 2,5-dimethyl-2,5-di (2-ethyl Hexanoyl peroxy) hexane (1.50 g) were charged, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into 2 kg of methanol / water = 60/40 (weight% / weight%) and precipitated. After washing with 2 kg of methanol / water = 60/40 (weight% / weight) And then vacuum-dried for a time to obtain 29 g of a diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy methacrylate copolymer. The obtained polymer had a number average molecular weight of 36,000, a diisopropyl fumarate residue unit of 58 mol%, a 2-hydroxyethyl methacrylate residue unit of 10 mol%, and a 4-methoxy divinyl acid residue unit of 32 mol%.

Synthesis Example 10 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy cinnamate ethyl copolymer) 10)

18 g of diisopropyl fumarate, 0.30 g of 2-hydroxyethyl acrylate, 32.0 g of ethyl 4-methoxy cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethyl Hexanoyl peroxy) hexane (1.45 g) were charged, and the pressure was reduced and the pressure was lowered. This ampoule was placed in a thermostatic chamber at 60 ° C and maintained for 48 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was dropped into 2 kg of methanol / water = 60/40 (weight% / weight%) and precipitated. After washing with 2 kg of methanol / water = 60/40 (weight% / weight) And then vacuum-dried for a time to obtain 27 g of a diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy methacrylate copolymer. The resulting polymer had a number average molecular weight of 37,000, a diisopropyl fumarate residue unit of 57 mol%, a 2-hydroxyethyl methacrylate residue unit of 3 mol%, and a 4-methoxy divinyl acid residue unit of 40 mol%.

Synthesis Example 11 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate) 11)

57 g of diisopropyl fumarate, 5.1 g of monoethyl fumarate, 3.9 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxy ) Hexane (1.46 g) were added, and the pressure and nitrogen pressure were repeated, and then they were dissolved in a reduced pressure state. This ampoule was placed in a thermostatic chamber at 62 DEG C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / Ethyl &lt; / RTI &gt; / 4-nitro cinnamate ethyl copolymer. The number-average molecular weight of the obtained polymer was 18,000, the diisopropyl fumarate residue unit was 78 mol%, the fumaric acid monoethyl residue unit was 12 mol%, and the 4-nitro cinnamate acid ethyl residue unit was 10 mol%.

Synthesis Example 12 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate) 12)

53 g of diisopropyl fumarate, 5.8 g of monoisopropyl fumarate, 6.0 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxide Oxy) hexane (1.91 g) were added, and the pressure and the pressure were repeatedly changed. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / 31 g of ethyl isopropyl / 4-nitro cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 16,000, the diisopropyl fumarate residue unit was 68 mol%, the monoisopropyl fumarate residue unit was 15 mol%, and the 4-nitro cinnamate acid ethyl residue unit was 17 mol%.

Synthesis Example 13 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate) 13)

48 g of diisopropyl fumarate, 5.7 g of monoisopropyl fumarate, 11.0 g of ethyl 4-nitro cinnamate and 0.567 g of 1,1'-azobis (cyclohexane-1-carbonitrile) as a polymerization initiator were added to a glass ampule having a capacity of 75 ml, , And the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 80 DEG C and maintained for 144 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / 10 g of ethyl isopropyl / 4-nitro cinnamate copolymer was obtained. The obtained polymer had a number average molecular weight of 13,000, a diisopropyl fumarate residue unit of 51 mol%, a monoisopropyl fumarate residue unit of 16 mol%, and a 4-nitro cinnamic acid ethyl residue unit of 33 mol%.

Synthesis Example 14 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 14)

40 g of diisopropyl fumarate, 4.9 g of monoethyl fumarate, 5.2 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxide Oxy) hexane (1.49 g) were added, and the pressure and the pressure were repeatedly changed. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / To obtain 17 g of an ethyl / 4-cyano ethyl cinnamate copolymer. The number-average molecular weight of the obtained polymer was 25,000, the diisopropyl fumarate residue unit was 78 mol%, the fumaric acid monoethyl residue unit was 9 mol%, and the 4-cyano divinyl ester residue was 13 mol%.

Synthesis Example 15 (Synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 15)

45 g of diisopropyl fumarate, 6.0 g of monoethyl fumarate, 12.9 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxide Oxy) hexane (1.929 g) were added, and the pressure and the pressure were repeatedly changed. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / 14 g of an ethyl / 4-cyano ethyl cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 17,000, the diisopropyl fumarate residue unit was 58 mol%, the fumaric acid monoethyl residue unit was 10 mol%, and the 4-cyano divinyl ester residue was 32 mol%.

Synthesis Example 16 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate) 16)

47 g of diisopropyl fumarate, 7.2 g of monoethyl fumarate, 11.0 g of ethyl 4-bromo cinnamate, and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxide Oxy) hexane (1.91 g) were added, and the pressure and the pressure were repeatedly changed. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / To obtain 33 g of an ethyl / 4-bromo cinnamate copolymer. The resulting polymer had a number average molecular weight of 25,000, a diisopropyl fumarate residue unit of 73 mol%, a fumaric acid monoethyl residue unit of 12 mol%, and a 4-bromo cinnamic acid ethyl residue unit of 15 mol%.

Synthesis Example 17 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate) 17)

59 g of diisopropyl fumarate, 2.5 g of monoethyl fumarate, 3.8 g of ethyl 4-nitro cinnamate, and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxy ) Hexane (1.99 g) was added, and the pressure and nitrogen pressure were repeated. This ampoule was placed in a thermostatic chamber at 62 DEG C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / Ethyl / 4-nitro cinnamate ethyl copolymer was obtained. The number-average molecular weight of the obtained polymer was 24,000, the diisopropyl fumarate residue unit was 87 mol%, the fumaric acid monoethyl residue unit was 4 mol%, and the 4-nitro cinnamate acid ethyl residue unit was 9 mol%.

Synthesis Example 18 (Synthesis of Cinnamic Acid Ester Copolymer (diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 18)

58 g of diisopropyl fumarate, 3.0 g of monoethyl fumarate, 7.0 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxide Oxy) hexane (1.90 g) were added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 62 DEG C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (weight% / weight%) and vacuum drying at 80 DEG C for 10 hours to obtain diisopropyl fumarate / To obtain 16 g of an ethyl / 4-cyano ethyl cinnamate copolymer. The number-average molecular weight of the obtained polymer was 21,000, the diisopropyl fumarate residue unit was 81 mol%, the fumaric acid monoethyl residue unit was 4 mol%, and the 4-cyano divinyl ester residue was 15 mol%.

Synthesis Example 19 (Synthesis of cinnamate ester copolymer (diethyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate) 19)

58 g of diethyl fumarate, 2.7 g of monoethyl fumarate, 4.1 g of ethyl 4-nitro cinnamate, and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoylperoxy) 2.17 g of hexane was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 DEG C for 10 hours to obtain diethyl ethyl fumarate / monoethyl fumarate / 4-nitro cinnamate ethyl copolymer was obtained. The number-average molecular weight of the obtained polymer was 16,000, the diethyl fumarate residue unit was 84 mol%, the fumaric acid monoethyl residue unit was 6 mol%, and the 4-nitro cinnamate acid ethyl residue unit was 10 mol%.

Synthesis Example 20 (Synthesis of Cinnamic acid ester copolymer (diethyl fumarate / ethyl 4-nitro cinnamate) 20)

53 g of diethyl fumarate, 12 g of ethyl 4-nitro cinnamate and 0.567 g of 1,1'-azobis (cyclohexane-1-carbonitrile) as polymerization initiator were placed in a glass ampule having a capacity of 75 ml, After repeating, it was dissolved in a reduced pressure state. The ampoule was placed in a thermostatic chamber at 80 DEG C and maintained for 144 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was dropped into 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (weight% / weight) and then vacuum-dried at 80 DEG C for 10 hours to give diethyl fumarate / 13 g of ethyl cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 13,000, the diethyl fumarate residue unit was 69 mol%, and the 4-nitrophenyl acid ethyl residue group was 31 mol%.

Synthesis Example 21 (synthesis of cinnamate ester copolymer (diethyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 21)

57 g of diethyl fumarate, 2.7 g of monoethyl fumarate, 5.2 g of ethyl 4-cyano cinnamate and 5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxy ) Hexane (2.17 g) was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 DEG C for 10 hours to obtain diethyl ethyl fumarate / monoethyl fumarate / 4-cyanoethyl cinnamate copolymer was obtained. The resulting polymer had a number average molecular weight of 21,000, a diethyl fumarate residue unit of 85 mol%, a fumaric acid monoethyl residue unit of 5 mol%, and a 4-cyano divinyl ester residue group of 10 mol%.

Synthesis Example 22 (synthesis of cinnamate ester copolymer (diethyl fumarate / ethyl 4-cyano cinnamate) 22)

54 g of diethyl fumarate, 11.0 g of ethyl 4-cyano cinnamate and 2.12 g of 2,5-dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane as a polymerization initiator were placed in a glass ampule having a capacity of 75 ml , And after nitrogen substitution and pressurization were repeated, they were dissolved in a reduced pressure state. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight), and then vacuum dried at 80 DEG C for 10 hours to obtain a diethyl fumarate / 15 g of an ethyl cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 15,000, the diethyl fumarate residue unit was 68 mol%, and the 4-cyano divinyl ester residue was 32 mol%.

Synthesis Example 23 (synthesis of cinnamate ester copolymer (diethyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate) 23)

52 g of diethyl fumarate, 3.2 g of monoethyl fumarate, 9.8 g of ethyl 4-bromo cinnamate, and 25 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl peroxy ) Hexane (2.17 g) was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 DEG C for 10 hours to obtain diethyl ethyl fumarate / monoethyl fumarate / 4-bromo cinnamate ethyl copolymer was obtained. The number-average molecular weight of the obtained polymer was 23,000, the diethyl fumarate unit was 83 mol%, the monoethyl fumarate unit was 5 mol%, and the 4-bromo-cinnamic acid ethyl residue unit was 12 mol%.

Synthesis Example 24 (Synthesis of di-t-butyl fumarate)

60 ml of ethylene glycol dimethyl ether, 20 g of maleic acid and 4 g of sulfuric acid were charged into a 300 ml autoclave equipped with a stirrer and a thermometer, and then 51 g of 2-methylpropylene was pushed in. For 2 hours.

80 ml of a solution of di-t-butyl maleate di-t-butyl obtained by neutralizing and washing the reaction solution obtained by the above reaction, and 0.3 g of piperidine were placed in three 150 ml portions equipped with a stirrer, a condenser and a thermometer, The reaction was carried out at 110 DEG C for 2 hours with stirring. As a result of GC analysis of the obtained reaction solution, the degree of isomerization of di-t-butyl fumarate was 99%. The solvent of the obtained reaction solution was distilled off and then sublimed to obtain 22 g of di-t-butyl fumarate having a purity of 99%.

Synthesis Example 25 (Synthesis of Cinnamic Acid Ester Copolymer (di-t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate) 24)

57 g of di-t-butyl fumarate, 5.7 g of monoethyl fumarate, 3.4 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl Peroxy) hexane (1.75 g) was added, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 62 DEG C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 26 g of a monoethyl fumarate / ethyl 4-nitro cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 22,000, the di-t-butyl fumarate residue unit was 77 mol%, the fumaric acid monoethyl residue unit was 13 mol%, and the 4-nitro cinnamate acid ethyl residue unit was 10 mol%.

Synthesis Example 26 (Synthesis of cinnamate ester copolymer (di-t-butyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate) 25)

53 g of di-t-butyl fumarate, 5.8 g of monoisopropyl fumarate, 5.5 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.75 g) was added, and the pressure and the pressure were repeatedly changed. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / To obtain 33 g of a monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer. The obtained polymer had a number average molecular weight of 18,000, 69 mol% of di-t-butyl fumarate residue unit, 15 mol% of monoisopropyl fumarate residue unit and 16 mol% of 4-nitro cinnamate acid ethyl residue unit.

Synthesis Example 27 (synthesis of cinnamate ester copolymer (di-t-butyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate) 26)

48 g of di-t-butyl fumarate, 5.3 g of monoisopropyl fumarate, 10.1 g of ethyl 4-nitro cinnamate and 1,1'-azobis (cyclohexane-1-carbonitrile) 0.823 g was added thereto, and after the nitrogen substitution and the pressure were repeated, it was dissolved in a reduced pressure state. The ampoule was placed in a thermostatic chamber at 80 DEG C and maintained for 144 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 13 g of a monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer was obtained. The obtained polymer had a number average molecular weight of 15,000, a di-t-butyl fumarate residue unit of 53 mol%, a monoisopropyl fumarate residue unit of 15 mol%, and a 4-nitro cinnamic acid ethyl residue unit of 32 mol%.

Synthesis Example 28 (Synthesis of Cinnamic acid ester copolymer (di-t-butyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 27)

40 g of di-t-butyl fumarate, 4.0 g of monoethyl fumarate, 4.7 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.49 g) were added, and the pressure and the pressure were repeatedly changed. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 21 g of an ethyl ethyl fumarate / 4-cyano ethyl cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 28,000, the di-t-butyl fumarate residue unit was 77 mol%, the fumaric acid monoethyl residue unit was 10 mol%, and the 4-cyano divinyl ester residue was 13 mol%.

Synthesis Example 29 (synthesis of cinnamate ester copolymer (di-t-butyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate) 28)

45 g of di-t-butyl fumarate, 5.1 g of monoethyl fumarate, 11.0 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.696 g) were charged, and the pressure and nitrogen pressure were repeatedly exchanged. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 15 g of an ethyl ethyl fumarate / 4-cyano ethyl cinnamate copolymer was obtained. The number average molecular weight of the obtained polymer was 19,000, the di-t-butyl fumarate residue unit was 58 mol%, the fumaric acid monoethyl residue unit was 9 mol%, and the 4-cyano divinyl ester residue was 33 mol%.

Synthesis Example 30 (Synthesis of Cinnamic Acid Ester Copolymer (di-t-butyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer) 29)

47 g of di-t-butyl fumarate, 6.0 g of monoethyl fumarate, 9.6 g of ethyl 4-bromo cinnamate and 5 g of 2,5-dimethyl-2,5-di (2-ethylhexa Nonyl peroxy) hexane (1.70 g) was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 38 g of a monoethyl fumarate / ethyl 4-bromo cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 30,000, the di-t-butyl fumarate residue unit was 74 mol%, the fumaric acid monoethyl residue unit was 11 mol%, and the 4-bromo cinnamate residue was 15 mol%.

Synthesis Example 31 (synthesis of cinnamate ester copolymer (di-t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate) 30)

59 g of di-t-butyl fumarate, 2.1 g of monoethyl fumarate, 3.2 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoyl Peroxy) hexane (1.68 g) was charged, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 62 DEG C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was added dropwise to 2 kg of hexane, followed by precipitation, washing with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum drying at 80 ° C for 10 hours to obtain di-t-butyl fumarate / 35 g of a monoethyl fumarate / ethyl 4-nitro cinnamate copolymer was obtained. The number-average molecular weight of the obtained polymer was 29,000, the di-t-butyl fumarate residue unit was 87 mol%, the fumaric acid monoethyl residue unit was 4 mol%, and the 4-nitro cinnamic acid ethyl residue unit was 9 mol%.

Synthesis Example 32 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-nitro cinnamate) 31)

49 g of diisopropyl fumarate, 6.7 g of diethyl fumarate, 4.0 g of 2-hydroxyethyl acrylate, 4.9 g of ethyl 4-nitro cinnamate, and 2.5 g of 2,5-dimethyl-2,5- 1.97 g of di (2-ethylhexanoylperoxy) hexane was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was added dropwise to 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight%) and vacuum dried at 80 ° C for 10 hours to obtain diisopropyl fumarate / di 27 g of an ethyl / 2-hydroxyethyl acrylate / 4-nitro cinnamate ethyl copolymer was obtained. The obtained polymer had a number average molecular weight of 21,000, a diisopropyl fumarate residue unit of 69 mol%, a diethyl fumarate residue unit of 10 mol%, a 2-hydroxyethyl acrylate residue unit of acrylic acid molar ratio of 10 mol%, a 4-nitrocomp acid ethyl residue unit of 11 mol% Respectively.

Synthesis Example 33 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-nitro cinnamate) 32)

50 g of diisopropyl fumarate, 8.0 g of N- (n-butoxymethyl) acrylamide, 6.8 g of ethyl 4-nitro cinnamate and 2.5 g of 2,5-dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane (1.91 g) were charged, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was dropped into 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum dried at 80 DEG C for 10 hours to obtain a diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-nitro cinnamate copolymer was obtained. The obtained polymer had a number average molecular weight of 15,000, a diisopropyl fumarate residue unit of 70 mol%, an N- (n-butoxymethyl) acrylamide residue unit of 15 mol% and a 4-nitrocomp acid acid ethyl residue unit of 15 mol%.

Synthesis Example 34 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-nitro cinnamate) 33)

In a glass ampule having a capacity of 75 ml, 42 g of diisopropyl fumarate, 6.3 g of diethyl fumarate, 4.0 g of 2-hydroxyethyl acrylate, 11.0 g of ethyl 4-nitro cinnamate and 1,1'-azobis -1-carbonitrile), and the mixture was repeatedly purged with nitrogen and then pressure-reduced, and then dissolved under reduced pressure. The ampoule was placed in a thermostatic chamber at 80 DEG C and maintained for 144 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was added dropwise to 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight%) and vacuum dried at 80 ° C for 10 hours to obtain diisopropyl fumarate / di 10 g of ethyl 2-hydroxyethyl acrylate / 4-nitro cinnamate ethyl copolymer was obtained. The obtained polymer had a number average molecular weight of 11,000, a diisopropyl fumarate residue unit of 47 mol%, a diethyl fumarate residue unit of 10 mol%, a 2-hydroxyethyl acrylate residue of acrylic acid unit of 9 mol%, a 4-nitro cinnamic acid ethyl residue unit of 34 mol% Respectively.

Synthesis Example 35 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-cyano cinnamate) 34)

In a glass ampule having a capacity of 75 ml, 41 g of diisopropyl fumarate, 6.7 g of diethyl fumarate, 4.0 g of 2-hydroxyethyl acrylate, 13.0 g of ethyl 4-cyano cinnamate and 2.5 g of 2,5- -Di (2-ethylhexanoylperoxy) hexane was charged, and the pressure was reduced and the pressure was reduced. This ampoule was placed in a thermostatic chamber at 65 DEG C and maintained for 120 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. The polymer solution was added dropwise to 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight%) and vacuum dried at 80 ° C for 10 hours to obtain diisopropyl fumarate / di 12 g of ethyl 2-hydroxyethyl acrylate / 4-cyano ethyl methacrylate copolymer was obtained. The obtained polymer had a number average molecular weight of 15,000, a diisopropyl fumarate residue unit of 45 mol%, a diethyl fumarate residue unit of 11 mol%, a 2-hydroxyethyl acrylate residue of acrylic acid unit of 11 mol%, a 4-cyanoacrylic acid ethyl residue unit of 33% It was mall.

Synthesis Example 36 (synthesis of cinnamate ester copolymer (diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-bromo cinnamate) 35)

In a glass ampule having a capacity of 75 ml, 47 g of diisopropyl fumarate, 7.1 g of N- (n-butoxymethyl) acrylamide, 10.7 g of ethyl 4-bromo cinnamate and 2.5 g of 2,5- 1.85 g of di (2-ethylhexanoylperoxy) hexane was added, and the pressure was reduced and the pressure was reduced. The ampoule was placed in a thermostatic chamber at 65 ° C and maintained for 72 hours to perform radical polymerization. After completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 50 g of tetrahydrofuran. This polymer solution was dropped into 2 kg of hexane and precipitated, washed with 2 kg of methanol / water = 60/40 (wt% / weight%) and then vacuum dried at 80 DEG C for 10 hours to obtain a diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-bromo cinnamate copolymer was obtained. The resulting polymer had a number average molecular weight of 21,000, a diisopropyl fumarate residue unit of 72 mol%, an N- (n-butoxymethyl) acrylamide residue unit of 13 mol% and a 4-bromo cinnamic acid ethyl residue unit of 15 mol%.

Example 1

105 g of ethyl cellulose (ETHOCEL standard 100, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, total degree of substitution DS = 2.5) as a cellulose- 45 g of the ethyl fumarate / 4-methoxy cinnamate copolymer was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution having a weight of 18% by weight and the solution was coated on a polyethylene terephthalate film (Ethyl cellulose: 70% by weight, monoethyl fumarate / ethyl 4-methoxy cinnamate copolymer: 30% by weight) was obtained after drying at a drying temperature of 25 캜. . The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 2

105 g of the ethyl cellulose used in Example 1 and 45 g of monoethyl fumarate / diisopropyl fumarate / methyl 4-ethoxycinnamate copolymer obtained in Synthesis Example 2 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm (ethyl cellulose: 70% by weight) was obtained. The film was dried at a drying temperature of 25 占 폚, , 30% by weight of monoethyl fumarate / diisopropyl fumarate / methyl 4-ethoxy cinnamate). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 3

97 g of ethyl cellulose used in Example 1 and 53 g of monoisopropyl fumarate / diethyl fumarate / isopropyl 4-methoxy cinnamate copolymer obtained in Synthesis Example 3 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 65 weight% (weight)) as a resin solution in an amount of 18% by weight based on the weight of the polyester resin solution, which was flexible on a polyethylene terephthalate film with a coater and dried at a drying temperature of 25 캜 %, Monoisopropyl fumarate / diethyl fumarate / isopropyl copolymer of 4-methoxy cinnamate: 35% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 4

105 g of the ethyl cellulose used in Example 1 and 45 g of the monoethyl fumarate / diethyl fumarate / ethyl 4-methoxy cinnamate copolymer obtained in Synthesis Example 4 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 70% by weight, ethyl cellulose: 70% by weight, 30% by weight of monoethyl fumarate / diethyl fumarate / ethyl 4-methoxy cinnamate). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The obtained optical compensation film had the desired optical properties in the in-plane retardation (Re) and the Nz coefficient, and also had a large film thickness of Re (589).

Example 5

92 g of ethyl cellulose used in Example 1 and 58 g of monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer obtained in Synthesis Example 5 were dissolved in toluene: acetone = 95: 5 (weight ratio) To prepare a 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater. After drying at 60 캜 and drying at 2 캜 at 140 캜, an optical compensation film (resin composition) having a width of 150 mm was obtained Ethyl cellulose: 60% by weight, monoethyl fumarate / diisopropyl fumarate / n-propyl copolymer of 4-methoxy cinnamate: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 6

112 g of ethyl cellulose used in Example 1 and 38 g of monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer obtained in Synthesis Example 6 were dissolved in toluene: acetone = 90: 10 (weight ratio) , And dried at a drying temperature of 60 DEG C, followed by drying at 140 DEG C for 2 steps. Thereafter, an optical compensation film (resin composition) having a width of 150 mm was coated on a polyethylene terephthalate film (Ethyl cellulose: 75% by weight, monoethyl fumarate / diisopropyl fumarate / n-propyl 4-methoxy cinnamate copolymer: 25% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 7

97 g of ethyl cellulose used in Example 1 (ETHOCEL standard 100 manufactured by Dow Chemical Company, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, 53 g of the diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / 4-methoxy cinnamate copolymer obtained in Reference Example 7 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 65% by weight, diisobutyl fumarate (manufactured by Dainippon Ink and Chemicals, Inc.) Propyl / N- (n-butoxymethyl) acrylamide / ethyl 4-methoxy cinnamate copolymer: 35% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 8

97 g of the ethyl cellulose used in Example 1 and 53 g of diethyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy cinnamic acid ethyl copolymer obtained in Synthesis Example 8 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 65% by weight) as a resin solution in an amount of 18% by weight based on the total weight of the composition and dissolved by a coater to be flexible on a polyethylene terephthalate film and dried at a drying temperature of 25 캜 By weight, diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-methoxy cinnamate copolymer: 35% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 9

90 g of the ethyl cellulose used in Example 1 and 60 g of the diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy cinnamate copolymer obtained in Synthesis Example 9 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) To prepare an 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 캜 to obtain an optical compensation film (resin composition) having a width of 150 mm (ethyl cellulose: 60% by weight, diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxyethyl methacrylate copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 10

97 g of the ethyl cellulose used in Example 1 and 53 g of the diisopropyl fumarate / 2-hydroxyethyl acrylate / 4-methoxy cinnamate copolymer obtained in Synthesis Example 10 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) To prepare an 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 캜 to obtain an optical compensation film (resin composition) having a width of 150 mm (ethyl cellulose: 65% by weight, diisopropyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-methoxy cinnamate copolymer: 35% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 1.

The obtained optical compensation film had the desired optical properties in the in-plane retardation (Re) and the Nz coefficient, and also had a large film thickness of Re (589).

Example 11

80 g of ethyl cellulose (ETHOCEL standard 100, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, total substitution degree DS = 2.5) as a cellulose resin as a cellulose resin, 70 g of diisopropyl fumarate / monoethyl / 4-nitro cinnamate fumarate copolymer was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution having a weight of 18% by weight. (Resin composition) having a width of 150 mm (ethyl cellulose: 53% by weight, diisopropyl fumarate / monoethyl fumarate / 4-nitro cinnamate fumarate) Ethyl copolymer: 47% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 12

90 g of the ethyl cellulose used in Example 1 and 60 g of the diisopropyl fumarate / monoisopropyl / 4-nitro cinnamate fumarate copolymer obtained in Synthesis Example 12 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) An optical compensation film (resin composition) having a width of 150 mm was obtained (ethyl cellulose: 60% by weight) by using a resin solution of 18% by weight and being flexible on a polyethylene terephthalate film by a coater and drying at a drying temperature of 25 캜. , Diisopropyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 13

105 g of ethyl cellulose used in Example 1 and 45 g of diisopropyl fumarate / monoisopropyl / 4-nitro cinnamate fumarate copolymer obtained in Synthesis Example 13 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm (ethyl cellulose: 70% by weight) was obtained. The film was dried at a drying temperature of 25 占 폚, , Diisopropyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer: 30% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 14

75 g of ethyl cellulose used in Example 1 and 75 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 14 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) An optical compensation film (resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50% by weight) by using a resin solution of 18% by weight and being flexible on a polyethylene terephthalate film by a coater and drying at a drying temperature of 25 캜. , Diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyanoacrylate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 15

90 g of ethyl cellulose used in Example 1 and 60 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 15 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) An optical compensation film (resin composition) having a width of 150 mm was obtained (ethyl cellulose: 60% by weight) by using a resin solution of 18% by weight and being flexible on a polyethylene terephthalate film by a coater and drying at a drying temperature of 25 캜. , Diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyanoacrylate copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 16

75 g of ethyl cellulose used in Example 1 and 75 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer obtained in Synthesis Example 16 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) An optical compensation film (resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50% by weight) by using a resin solution of 18% by weight and being flexible on a polyethylene terephthalate film by a coater and drying at a drying temperature of 25 캜. , Diisopropyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 17

75 g of ethyl cellulose used in Example 1 and 75 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 17 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50 weight% (weight)) as a resin solution by weight, %, Diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The obtained optical compensation film had the objective optical properties of the in-plane retardation (Re) and the Nz coefficient, and Re (589) / film thickness was large.

Example 18

75 g of ethyl cellulose used in Example 1 and 75 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 18 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50 (weight ratio)) to obtain a resin solution of 18% by weight, which was flexible on the support of the solution casting apparatus by the T- By weight, diisopropyl fumarate / monoethyl fumarate / ethyl 4-cyanoacrylate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The obtained optical compensation film had the objective optical properties of the in-plane retardation (Re) and the Nz coefficient, and Re (589) / film thickness was large.

Example 19

80 g of ethyl cellulose (ETHOCEL standard 100, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, total substitution degree DS = 2.5) as a cellulose resin as a cellulose- 70 g of a diethyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution having a weight of 18% by weight and a polyethylene terephthalate (Ethyl cellulose: 53% by weight, diethyl fumarate / monoethyl fumarate / ethyl ethyl 4-nitro cinnamate), and the film was dried at a drying temperature of 25 deg. Coalescence: 47% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 20

90 g of the ethyl cellulose used in Example 1 and 60 g of the diethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 20 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Ethylcellulose: 60% by weight, diethyl fumarate / 4: 1), and the film was dried at a drying temperature of 25 DEG C to obtain an optical compensation film -Nitroethyl cinnamate ethyl copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 21

75 g of the ethyl cellulose used in Example 1 and 75 g of diethyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 21 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50% by weight, ethyl cellulose: 50% by weight, Diethyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 22

85 g of the ethyl cellulose used in Example 1 and 65 g of the diethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 22 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Ethylcellulose: 57% by weight, diethyl fumarate / ethyl acrylate / ethyl acrylate / ethyl acrylate / ethyl acrylate / ethyl acrylate / ethyl acrylate copolymer) 4-cyanoethyl cinnamate ethyl copolymer: 43% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 23

75 g of the ethyl cellulose used in Example 1 and 75 g of the diethyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer obtained in Synthesis Example 23 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50% by weight, ethyl cellulose: 50% by weight, Diethyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 24

80 g of ethyl cellulose (ETHOCEL standard 100, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, total degree of substitution DS = 2.5) as a cellulose resin as a cellulose- 70 g of diethyl t-butyl fumarate / ethyl fumarate / ethyl 4-nitro cinnamate copolymer was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution of 18 weight% (Ethyl cellulose: 53% by weight, di-t-butyl fumarate / monoethyl fumarate / fumaric acid copolymer) was obtained on a polyethylene terephthalate film and dried at a drying temperature of 25 占 폚. 4-nitro-cinnamic acid ethyl copolymer: 47% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 25

90 g of ethyl cellulose used in Example 1 and 60 g of di-t-butyl fumaric acid monoisopropyl / 4-nitro cinnamate ethyl copolymer obtained in Synthesis Example 26 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 60 (trade name), manufactured by Fuji Photo Film Co., Ltd.) By weight, di-t-butyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 26

105 g of ethyl cellulose used in Example 1 and 45 g of di-t-butyl fumarate / monoisopropyl / 4-nitro cinnamate fumarate copolymer obtained in Synthesis Example 27 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 70% by weight) to obtain a resin solution of 18% by weight, which was made flexible by a coater on a polyethylene terephthalate film and dried at a drying temperature of 25 캜 30% by weight of di-t-butyl fumarate / monoisopropyl fumarate / ethyl 4-nitro cinnamate copolymer). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 27

75 g of the ethyl cellulose used in Example 1 and 75 g of di-t-butyl fumaric acid monoethyl / 4-cyano ethyl cinnamate copolymer obtained in Synthesis Example 28 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50 (trade name)). The resulting solution was dissolved in water to give a resin solution of 18% by weight, which was flexible on a polyethylene terephthalate film with a coater and dried at a drying temperature of 25 캜. 50% by weight of ethyl t-butyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 28

90 g of ethyl cellulose used in Example 1 and 60 g of diethyl t-butyl fumarate / monoethyl fumarate / ethyl 4-cyano cinnamate copolymer obtained in Synthesis Example 29 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 60 (trade name), manufactured by Fuji Photo Film Co., Ltd.) By weight, di-t-butyl fumarate / monoethyl fumarate / 4-cyano ethyl cinnamate copolymer: 40% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 29

75 g of ethyl cellulose used in Example 1 and 75 g of di-t-butyl fumaric acid monoethyl / 4-bromo cinnamate ethyl copolymer obtained in Synthesis Example 30 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 50 (trade name)). The resulting solution was dissolved in water to give a resin solution of 18% by weight, which was flexible on a polyethylene terephthalate film with a coater and dried at a drying temperature of 25 캜. By weight, di-t-butyl fumarate / monoethyl fumarate / ethyl 4-bromo cinnamate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 30

75 g of ethyl cellulose used in Example 1 and 75 g of diethyl t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 31 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: methyl ethyl ketone solution) at a drying temperature of 25 deg. C by using a T-die method, 50% by weight, di-t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The obtained optical compensation film had the objective optical properties of the in-plane retardation (Re) and the Nz coefficient, and Re (589) / film thickness was large.

Example 31

78 g of ethylcellulose (ETHOCEL standard 100, molecular weight Mn = 55,000, molecular weight Mw = 176,000, Mw / Mn = 3.2, total degree of substitution DS = 2.5) 72 g of diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / 4-nitro cinnamate copolymer was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 52% by weight, diisopropyl fumarate / fumaric acid fumarate), and an optical compensation film (resin composition) having a width of 150 mm was obtained after being dried on a polyethylene terephthalate film by a coater, Diethyl acrylate / 2-hydroxyethyl acrylate / 4-nitro cinnamate ethyl copolymer: 48% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆).

The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 32

88 g of the ethyl cellulose used in Example 1 and 62 g of diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 33 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 ° C to obtain an optical compensation film (resin composition) having a width of 150 mm (Ethyl cellulose: 59% by weight, diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-nitro cinnamate: 41% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 33

102 g of ethyl cellulose used in Example 1 and 48 g of diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 34 were dissolved in methylene chloride: acetone = 8: 2 (Weight ratio) to obtain a resin solution of 18% by weight, which was flexible on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 占 폚 to obtain an optical compensation film (resin composition) having a width of 150 mm Ethyl cellulose: 68% by weight, diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-nitro cinnamate: 32% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 34

88 g of the ethyl cellulose used in Example 1 and 62 g of diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / 4-cyano ethyl methacrylate copolymer obtained in Synthesis Example 35 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 ° C to obtain an optical compensation film (resin composition) having a width of 150 mm (Ethyl cellulose: 59% by weight, diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-cyanoacrylate copolymer: 41% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Example 35

75 g of the ethyl cellulose used in Example 1 and 75 g of diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-bromo cinnamate copolymer obtained in Synthesis Example 36 were dissolved in methylene chloride: acetone = 8 : 2 (weight ratio) to prepare a 18 wt% resin solution. The solution was plied on a polyethylene terephthalate film by a coater and dried at a drying temperature of 25 캜. Thereafter, an optical compensation film (Ethyl cellulose: 50% by weight, diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-bromo cinnamate copolymer: 50% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 2.

The resulting optical compensation film had a high optical transmittance and excellent transparency, a small haze, an in-plane retardation (Re) and an Nz coefficient of the intended optical properties, and a large Re (589) / film thickness .

Comparative Example 1

150 g of the ethyl cellulose used in Example 1 was dissolved in methylene chloride / acetone = 8: 2 (weight ratio) to prepare a 18 wt% resin solution. The solution was plied to the support of the solution casting apparatus by the T- Deg.] C, and a film having a width of 150 mm was obtained. The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 占 폚 to 1.4 times (thickness after stretching of 30 占 퐉). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are shown in Table 3.

The resulting film had a large out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 2

180 g of the monoethyl fumarate / 4-methoxy cinnamate copolymer used in Example 1 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a 18 wt% resin solution. After drying on a support of the apparatus at a drying temperature of 25 占 폚, a film (resin composition) having a width of 150 mm and a thickness of 40 占 퐉 was obtained. The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are also shown in Table 3.

The obtained film had a small out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 3

180 g of a diisopropyl fumarate / monoethyl / 4-nitro cinnamate fumarate copolymer used in Example 11 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution having a weight of 18% To a support of a solution casting machine and dried at a drying temperature of 25 占 폚 to obtain a film (resin composition) having a width of 150 mm and a thickness of 40 占 퐉. The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are also shown in Table 3.

The obtained film had a small out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 4

180 g of diethyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer used in Example 19 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a 18 wt% resin solution. To a support of a solution casting machine and dried at a drying temperature of 25 占 폚 to obtain a film (resin composition) having a width of 150 mm and a thickness of 40 占 퐉. The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are also shown in Table 3.

The obtained film had a small out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 5

180 g of diethyl t-butyl fumarate / ethyl fumarate / ethyl 4-nitro cinnamate copolymer used in Example 24 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) to prepare a resin solution of 18 wt% After drying at 25 deg. C in a flexible state on a support of a solution casting apparatus by a die method, a film (resin composition) having a width of 150 mm and a thickness of 40 m was obtained. The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are also shown in Table 3.

The obtained film had a small out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 6

180 g of diisopropyl fumarate / diethyl fumarate / ethyl 2-hydroxyethyl acrylate / 4-nitro cinnamate copolymer used in Example 31 was dissolved in methylene chloride: acetone = 8: 2 (weight ratio) Solution, which was flexible on a support of a solution casting machine by the T-die method and dried at a drying temperature of 25 占 폚 to obtain a film (resin composition) having a width of 150 mm and a thickness of 40 占 퐉. The light transmittance, haze, retardation, and wavelength dispersion characteristics of the obtained film were measured. The results are also shown in Table 3.

The obtained film had a small out-of-plane retardation (Rth) in the thickness direction and did not have the desired optical properties.

Comparative Example 7

30 g of the ethyl cellulose used in Example 1 and 120 g of the monoethyl fumarate / 4-methoxy cinnamate copolymer obtained in Synthesis Example 1 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) The solution was made flexible by a T-die method on a support of a solution casting machine and dried at a drying temperature of 25 DEG C to obtain an optical compensation film (resin composition) having a width of 150 mm (ethyl cellulose: 20% by weight, mono fumarate Ethyl / 4-methoxyethyl methacrylate copolymer: 80% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Comparative Example 8

30 g of the ethyl cellulose used in Example 1 and 120 g of diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / 4-methoxy cinnamate copolymer obtained in Synthesis Example 7 were dissolved in methylene chloride: acetone = 8 : 2 (weight ratio) to prepare a 18 wt% resin solution. The solution was made flexible by a T-die method on a support of a solution casting apparatus and dried at a drying temperature of 25 캜. (Ethyl cellulose: 20% by weight, diisopropyl fumarate / N- (n-butoxymethyl) acrylamide / ethyl 4-methoxy cinnamate copolymer: 80% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Comparative Example 9

30 g of ethyl cellulose used in Example 1 and 120 g of diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 11 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: 20 weight% (weight)) as a resin solution by weight, %, Diisopropyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer: 80% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Comparative Example 10

30 g of the ethyl cellulose used in Example 1 and 120 g of the diethyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 19 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm (ethyl cellulose: 20% by weight) was obtained. The film was dried at a drying temperature of 25 캜, , 80% by weight of diethyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Comparative Example 11

30 g of ethyl cellulose used in Example 1 and 120 g of di-t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer obtained in Synthesis Example 25 were dissolved in methylene chloride: acetone = 8: 2 (weight ratio) (Resin composition) having a width of 150 mm was obtained (ethyl cellulose: methyl ethyl ketone solution) at a drying temperature of 25 deg. C by using a T-die method, 20% by weight, di-t-butyl fumarate / monoethyl fumarate / ethyl 4-nitro cinnamate copolymer: 80% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Comparative Example 12

30 g of the ethyl cellulose used in Example 1 and 120 g of diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / 4-nitro cinnamate ethyl copolymer obtained in Synthesis Example 32 were dissolved in methylene chloride: acetone = 8: 2 (Weight ratio) to obtain a resin solution of 18% by weight. The solution was made flexible by a T-die method on a support of a solution casting apparatus and dried at a drying temperature of 25 占 폚. (Ethyl cellulose: 20% by weight, diisopropyl fumarate / diethyl fumarate / 2-hydroxyethyl acrylate / ethyl 4-nitro cinnamate copolymer: 80% by weight). The obtained optical compensation film was cut into 50 mm square and uniaxially stretched at 150 캜 at 2.0 times (thickness after stretching of 30 탆). The light transmittance, haze, retardation, and wavelength dispersion characteristics of the resulting optical compensation film were measured. The results are also shown in Table 3.

The in-plane retardation (Re) and the Nz coefficient of the obtained film did not have the desired optical properties.

Japanese Patent Application No. 2014-210357 filed on October 15, 2014, Japanese Patent Application No. 2014-210358 filed on October 15, 2014, Japanese Patent Application No. 2014-210358 filed on November 25, 2014, Japanese Patent Application No. 2013-239366 filed on November 26, 2014, Japanese Patent Application No. 2014-239367 filed on November 26, 2014, and Japanese Patent Application 2015 -185764, the entire contents of the claims and the abstract are incorporated herein by reference and the disclosure of the specification of the present invention.

Claims (29)

A resin composition comprising 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer as a resin component.
[Chemical Formula 1]

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.) The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following general formula (2).
(2)

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). 3. The method of claim 2,
Wherein the cinnamic acid ester copolymer comprises 5 to 50% by mole of a fumaric acid monoester residue unit represented by the following formula (3), 0 to 85% by mole of a fumaric acid diester residue unit represented by the following formula (4) And 10 to 90 mol% of an alkoxy cinnamate ester residue unit.
(3)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)
[Chemical Formula 4]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
[Chemical Formula 5]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). 3. The method of claim 2,
Wherein the cinnamic acid ester copolymer comprises 10 to 50% by mole of a fumaric acid monoester residue unit represented by the following formula (3), 0 to 60% by mole of a fumaric acid diester residue unit represented by the following formula (4) And 30 to 90 mol% of an alkoxy cinnamate ester residue unit.
[Chemical Formula 6]

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.)
(7)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
[Chemical Formula 8]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). The method according to claim 2 or 3,
Wherein the cinnamate ester copolymer is selected from the group consisting of a fumaric acid monomethyl residue unit, a fumaric acid monoethyl residue unit, a fumaric acid monoisopropyl residue unit, a fumaric acid mono-n-propyl residue unit, a fumaric acid mono-n-butyl residue unit, a fumaric acid mono-t- 5 to 50 mol% of a fumaric acid monoester residue unit selected from mono-2-ethylhexyl fumarate residue units, a dimethyl fumarate residue unit, a diethyl fumarate residue unit, a diisopropyl fumarate residue unit, a di- 0 to 85 mol% of a fumaric acid diester residue unit selected from a di-n-butyl fumarate residue, a di-n-butyl fumarate residue, a di-t-butyl fumarate residue and a di- And 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (1).
[Chemical Formula 9]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). 3. The method of claim 2,
Wherein the cinnamic acid ester copolymer comprises 5 to 85 mol% of a fumaric acid diester residue unit represented by the following formula (4), an acrylic ester residue unit represented by the following formula (5), a methacrylic acid ester residue represented by the following formula (6) , 5 to 40 mol% of a residue unit selected from the group consisting of an acrylamide residue unit represented by the following general formula (7) and a methacrylic acid amide residue unit represented by the following general formula (8) And 10 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (1).
[Chemical formula 10]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
(11)

[Chemical Formula 12]

[Chemical Formula 13]

[Chemical Formula 14]

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)
[Chemical Formula 15]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). 3. The method of claim 2,
Wherein the cinnamic ester copolymer comprises 5 to 65 mol% of a fumaric acid diester residue unit represented by the following formula (4), an acrylic ester residue unit represented by the following formula (5), a methacrylic acid ester residue represented by the following formula (6) , 5 to 40 mol% of a residue unit selected from the group consisting of an acrylamide residue unit represented by the following general formula (7) and a methacrylic acid amide residue unit represented by the following general formula (8) And 30 to 90 mol% of an alkoxy cinnamate ester residue unit represented by the following formula (1).
[Chemical Formula 16]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
[Chemical Formula 17]

[Chemical Formula 18]

[Chemical Formula 19]

[Chemical Formula 20]

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms)
[Chemical Formula 21]

(Wherein R ₄ and R ₅ each independently represent an alkyl group having 1 to 12 carbon atoms). The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 20 mol% or more of a fumaric acid diester residue unit represented by the following formula (4) and 5 mol% or more of a substituted cinnamic acid ester residue unit represented by the following formula (9).
[Chemical Formula 22]

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
(23)

(Wherein R ₁₃ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group. The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 20 mol% or more of a fumaric acid diester residue unit represented by the following formula (4) and 5 mol% or more of a p-substituted cinnamic acid ester residue unit represented by the following formula (10) Composition.
&Lt; EMI ID =

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
(25)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group. The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 20 to 90% by mole of a fumaric acid diester residue unit represented by the following formula (4), 5 to 75% by mole of a p-substituted cinnamic acid ester residue unit represented by the following formula (10) And 5 to 30 mol% of a fumaric acid monoester residue unit represented by the following formula (3).
(26)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
(27)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.
(28)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.) The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 20 to 95% by mole of a diethyl fumarate residue unit, 5 to 75% by mole of a p-substituted cinnamate ester residue unit represented by the following general formula (10), and a fumaric acid monoester represented by the following general formula (3) A fumaric acid ester copolymer containing 0 to 30 mol% of a residue unit, 20 to 90 mol% of a diisopropyl fumarate residue unit, 5 to 75 mol% of a p-position substituted cinnamic acid ester residue unit represented by the following general formula (10) A fumaric acid ester copolymer comprising 5 to 30 mol% of a fumaric acid monoester residue unit represented by the general formula (3), 20 to 90 mol% of a di-t-butyl fumarate residue unit and a p-substituted cinnamic acid represented by the general formula (10) 5 to 75 mol% of an ester residue unit and 5 to 30 mol% of a fumaric acid monoester residue unit represented by the general formula (3) And a cinnamic acid ester copolymer selected from the group consisting of acrylic acid ester copolymers and methacrylic acid ester copolymers.
[Chemical Formula 29]

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.
(30)

(In the formula, R ₆ represents an alkyl group having 1 to 12 carbon atoms.) The method according to claim 10 or 11,
The fumaric acid monoester residue unit according to claim 10 or 11, wherein the fumaric acid monoester residue unit is a fumaric acid monomethyl residue unit, a fumaric acid monoethyl residue unit, a fumaric acid monoisopropyl residue unit, a fumaric acid mono-n-propyl residue unit, Is a fumaric acid monoester residue unit selected from the group consisting of a fumaric acid mono-t-butyl residue unit, a fumaric acid mono-s-butyl residue unit, a fumaric acid mono-t-butyl residue unit and a fumaric acid mono-2-ethylhexyl residue unit. The method according to claim 1,
Wherein the cinnamic acid ester copolymer comprises 20 to 94.5 mol% of a fumaric acid diester residue unit represented by the following formula (4), 5 to 75 mol% of a p-substituted cinnamic acid ester residue unit represented by the following formula (10) (5), a methacrylate residue unit represented by the following formula (6), an acrylamide residue unit represented by the following formula (7), a methacrylate amide residue represented by the following formula (8) And 0.5 to 30 mol% of a residue unit selected from the group consisting of the repeating unit represented by the following formula (1).
(31)

(Wherein R ₇ and R ₈ each independently represent an alkyl group having 1 to 12 carbon atoms.)
(32)

(Wherein R ₁₄ represents an alkyl group having 1 to 12 carbon atoms, and X represents a nitro group, a bromo group, an iodo group, a cyano group, a chloro group, a sulfonic acid group, a carboxylic acid group, a fluoro group or a phenyl group.
(33)

(34)

(35)

(36)

(Wherein R ₉ , R ₁₀ , R ₁₁ and R ₁₂ each independently represent an alkyl group, an alkylene group or an ether group having 1 to 12 carbon atoms) 14. The method according to any one of claims 9 to 13,
wherein the p-position substituted cinnamic acid ester residue unit is selected from the group consisting of 4-nitro cinnamate methyl residue unit, 4-nitro cinnamate ethyl residue unit, 4-nitro cinnamate isopropyl residue unit, Butyl 4-nitrocinnamate, 2-ethylhexyl residue of 4-nitro cinnamic acid, methyl residue of 4-fluoro cinnamic acid, ethyl 4-fluoro cinnamate, Fluorosuccinic acid isopropyl residue unit, 4-fluoro cinnamic acid n-propyl residue unit, 4-fluoro cinnamate n-butyl residue unit, 4-fluoro cinnamate iso- Chlorosuccinic acid isopropyl residue unit, 4-chloro cinnamic acid isopropyl residue unit, 4-chlorosuccinic acid iso-propyl residue unit, 4-chloro cinnamic acid methyl residue unit, A propyl residue unit, Chlorosuccinic acid tert-butyl residue unit, 4-chloro cinnamic acid 2-ethylhexyl residue unit, 4-bromo cinnamic acid methyl residue unit, 4- 4-bromo cinnamic acid ethyl ester unit, 4-bromo cinnamic acid isopropyl residue unit, 4-bromo cinnamic acid n-propyl residue unit, 4-bromo cinnamic acid n-butyl residue unit, Unit, 4-bromo cinnamate tert-butyl residue unit, 4-bromo cinnamic acid 2-ethylhexyl residue unit, 4-iodohexadecanoate residue, 4-iodohexadecanoate residue, Iodine cinnamate n-propyl residue unit, n-butyl iodide residue unit, sec-butyl residue unit of 4-iodohexadecanoate, tert-butyl residue unit of 4-iodohexadecanoate, 2-ethylhexyl residue unit of 4- , 4-cyano cinnamate methyl residue unit, ethyl 4-cyano cinnamate residue Unit, 4-cyano cinnamate isopropyl residue unit, 4-cyano cinnamic acid n-propyl residue unit, 4-cyano cinnamate n-butyl residue unit, 4-cyano cinnamate sec- 4-sulfonic acid methyl ester residue, 4-sulfonic acid ethyl ester residue, 4-sulfonic acid isopropyl residue unit, 4-sulfonic acid isopropyl residue unit, 4-sulfonic acid n- 4-sulfonic acid tert-butyl residue unit of 4-sulfonic acid, 2-ethylhexyl residue unit of 4-sulfonic acid cinnamate, 4-carboxylic acid cinnamic acid unit, Carboxylic acid cinnamate isopropyl residue unit, 4-carboxylic acid cinnamate n-propyl residue unit, 4-carboxylic acid cinnamate n-butyl residue unit, 4-carboxylic acid cinnamate sec- , Tert-butyl 4-carboxylic acid cinnamate unit, 4-carboxylic acid cinnamate Phenyl 4-phenylamino acid residue, 4-phenylhexanoic acid residue, 4-phenylhexanoate residue, 2-ethylhexyl residue unit, 4-phenyl cinnamic acid methyl residue unit, Wherein the resin unit is selected from the group consisting of a 4-phenyl cinnamic acid sec-butyl residue unit, a 4-phenyl cinnamic acid tert-butyl residue unit and a 4-phenyl cinnamic acid 2-ethylhexyl residue unit. 15. The method according to any one of claims 1 to 14,
A resin compound characterized in that the cellulose-based resin represented by the general formula (1) is a cellulose ether. 16. The method of claim 15,
And the degree of etherification (degree of substitution) of the cellulose ether is 1.5 to 3.0. An optical compensation film comprising the resin composition according to any one of claims 1 to 16 and having a thickness of 5 to 200 탆. An optical compensation film comprising the resin composition according to any one of claims 1 to 16 and having a thickness of 20 to 60 탆. The method according to claim 17 or 18,
Plane retardation Re represented by the following formula (1) is 80 to 300 nm and the Nz coefficient represented by the following formula (2) is 0.35 to 0.65.
Re = (ny - nx) xd (1)
Nz = (ny - nz) / (ny - nx) (2)
(Where nx represents the refractive index in the fast axis direction in the film plane, ny represents the refractive index in the slow axis direction in the film plane, nz represents the refractive index outside the film surface, and d represents the film thickness). The method according to claim 17 or 18,
Wherein the in-plane retardation Re represented by the formula (1) is 50 to 300 nm and the Nz coefficient represented by the formula (2) is -0.2 to 0.2. The method according to claim 17 or 18,
Plane retardation Re represented by the formula (1) is 0 to 20 nm and the out-of-plane retardation (Rth) represented by the following formula (3) is -150 to 20 nm.
Rth = [(nx + ny) / 2 - nz] xd (3)
(Where nx represents the refractive index in the fast axis direction in the film plane, ny represents the refractive index in the slow axis direction in the film plane, nz represents the refractive index outside the film surface, and d represents the film thickness). 22. The method according to any one of claims 17 to 21,
And a light transmittance of 85% or more. 23. The method according to any one of claims 17 to 22,
And the haze is 1% or less. 24. The method according to any one of claims 17 to 23,
(450) / Re (550) of the retardation at 450 nm to the retardation at 550 nm is 0.60 &lt; Re (450) / Re (550) &lt; 1.05. 25. The method according to any one of claims 17 to 24,
Wherein the retardation at 589 nm and the film thickness ratio Re (589) (nm) / film thickness (占 퐉) is 4.0 nm / 탆 or more. A resin composition containing 30 to 99% by weight of a cellulose resin represented by the following general formula (1) and 1 to 70% by weight of a cinnamic acid ester copolymer as a resin component is dissolved in a solvent, the resulting resin solution is cast on a substrate, The method for producing an optical compensation film according to any one of claims 17 to 25, wherein the optical compensation film is peeled off from the substrate.
(37)

(Wherein R ₁ , R ₂ , and R ₃ are each independently hydrogen or a substituent having 1 to 12 carbon atoms.) 27. The method of claim 26,
Wherein the degree of etherification (substitution degree) when the cellulose resin represented by the general formula (1) is cellulose ether is 1.5 to 3.0. The method for producing an optical compensation film as claimed in any one of claims 19 to 20, wherein the film having a thickness of 10 to 200 占 퐉 obtained by casting is uniaxially or uniaxially stretched. The method for producing an optical compensation film according to claim 19 or 20, wherein the film having a thickness of 30 to 100 占 퐉 obtained by casting is uniaxially or uniaxially stretched.