KR20060044697A - Cellulose body composition and cellulose body film - Google Patents

Abstract

(Problem) The cellulose body composition useful for forming a film with high Re expressionability is provided, and the film excellent in optical performance is obtained.

(Solution means) The cellulose body and the compound represented by the following general formula (1) (wherein R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁹ and R ¹⁰ are each independently a hydrogen atom or A substituent is shown, and R <^3> and R <^8> represent substituents other than a hydrogen atom, respectively. R <^11> represents a hydrogen atom, an alkyl group, or an aryl group.) A cellulose film is created using the cellulose body composition containing 1 or more types.

[Formula 1]

Description

Cellulose Body Composition and Cellulose Film {CELLULOSE BODY COMPOSITION AND CELLULOSE BODY FILM}

The present invention relates to a cellulosic composition and a film using the same, in particular a cellulosic composition containing an an benzoate anhydride compound and a film using the same.

The cellulose-based film, and the cellulose acetate film, among others, is characterized by high optical isotropy (low retardation value) compared with other polymer films. Therefore, a cellulose acetate film is normally used for the use which requires optical isotropy, for example, a polarizing plate. On the other hand, optical anisotropy (high retardation value) is calculated | required in optical compensation sheets (retardation film), such as a liquid crystal display device. Therefore, as an optical compensation sheet, it was common to use a synthetic polymer film with a high retardation value, such as a polycarbonate film and a polysulfone film.

As described above, in the technical field of optical materials, when optical anisotropy (high retardation value) is required for a polymer film, a synthetic polymer film is used, and when optical isotropy (low retardation value) is required, a cellulose acetate film is used. It was common to use.

In recent years, however, a cellulose acetate film having a high retardation value that can be used for applications requiring optical anisotropy is required, and a technology corresponding thereto has been proposed (for example, Patent Document 1). In this document, in order to realize a high retardation value with cellulose triacetate, the aromatic compound which has 2 or more aromatic rings, especially the compound which has a 1,3,5-triazine ring is added and extended | stretched.

In general, cellulose triacetate is a polymer material which is difficult to stretch, and it is known that it is difficult to increase the birefringence. However, in Patent Document 1, it is possible to increase the birefringence by aligning the additives simultaneously by stretching treatment, The retardation value is realized.

On the other hand, in order to reduce the weight of a recent liquid crystal display device and to reduce manufacturing cost, thinning of a liquid crystal cell is essential. Therefore, the optical performance required for an optical compensation sheet is higher than Re and lower Rth with respect to the optical anisotropy (Re retardation value, Rth retardation value) which can be realized by the compound which has a 1,3,5-triazine ring. Has been required.

(Patent Document 1) European Patent Application Publication No. 0 911 656 A2

However, as a result of earnestly examining by the method disclosed in Patent Document 1, it has been found that there is a problem that the above-described Re retardation value and Rth retardation value cannot be arbitrarily combined. Therefore, the development of a new optical performance control technology is required.

Therefore, the 1st objective of this invention is providing the cellulose body composition which can form the film excellent in optical performance.

A second object of the present invention is to provide a cellulose acylate film excellent in optical properties.

The above object of the present invention has been achieved by the following means.

[1] A cellulose body composition comprising a cellulose body and at least one compound represented by the following general formula (1).

[Formula 1]

(Wherein, R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁹ and R ¹⁰ each independently represent a hydrogen atom or a substituent, and R ³ and R ⁸ each represent a substituent other than a hydrogen atom. R ¹¹ represents a hydrogen atom, an alkyl group or an aryl group.)

[2] The cellulose-based composition according to [1], wherein the compound represented by the general formula (1) is represented by the following general formula (1-A).

[Formula 1-A]

(Wherein R ¹² represents an alkyl group. R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ and R ¹¹ are respectively represented by those of formula (1) and It is the same meaning.)

[3] The cellulose-based composition according to [1], wherein the compound represented by the general formula (1) is represented by the following general formula (1-B).

[Formula 1-B]

Wherein R ¹³ represents a hydrogen atom or an alkyl group. R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ and R ¹² are each represented by the formula (1-A The same meaning as those in

[4] The cellulosic composition according to [1], wherein the compound represented by the general formula (1) is represented by the following general formula (1-C).

[Formula 1-C]

Wherein R ¹⁴ represents an alkyl group. R ² , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹² and R ¹³ are the same as those in the formula (1-B), respectively. It means.)

[5] A cellulose-like film formed from the cellulose-based composition according to any one of [1] to [4].

[6] The cellulose body film according to [5], wherein the cellulose body is cellulose acylate.

[7] The cellulose body film according to [5] or [6], which is an optical film.

[8] The cellulose body film according to any one of [5] to [7], in which the optical film is a polarizing plate protective film or an optical compensation sheet.

[9] A film characterized by containing at least one compound represented by formula (1) and formulas (1-A) to (1-C).

Best Mode for Carrying Out the Invention

[Cellulose Body Composition]

First, the compound represented by the said General formula (1) of this invention is demonstrated in detail.

In formula (1), R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁹ and R ¹⁰ each independently represent a hydrogen atom or a substituent, and as such substituents, the following substituent T may be applied. Can be. In addition, when possible, each may connect and form a ring.

As the substituent T, for example, an alkyl group (preferably having 1 to 20 carbon atoms, more preferably 1 to 12 carbon atoms, particularly preferably 1 to 8 carbon atoms), for example methyl, ethyl, iso-propyl, tert-butyl , n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl, cyclohexyl, and the like), alkenyl group (preferably 2 to 20 carbon atoms, more preferably 2 to 12 carbon atoms), in particular Preferably it is C2-C8, for example, vinyl, allyl, 2-butenyl, 3-pentenyl, etc., an alkynyl group (preferably C2-C20, More preferably, it is C2-C8) 12, particularly preferably 2 to 8 carbon atoms, for example, propargyl, 3-pentenyl, and the like, an aryl group (preferably 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms); Especially preferably, it is C6-C12, For example, phenyl, p-methylphenyl, naphthyl, etc. are mentioned), Ring or unsubstituted amino group (preferably 0 to 20 carbon atoms, more preferably 0 to 10 carbon atoms, particularly preferably 0 to 6 carbon atoms, for example amino, methylamino, dimethylamino, diethylamino, di Benzylamino etc.) and an alkoxy group (preferably C1-C20, More preferably, it is C1-C12, Especially preferably, it is C1-C8, For example, methoxy, ethoxy, butoxy And an aryloxy group (preferably C6-C20, More preferably, it is C6-C16, Especially preferably, it is C6-C12, For example, phenyloxy, 2-naphthyloxy, etc. Acyl group (preferably C1-C20, More preferably, it is C1-C16, Especially preferably, it is C1-C12, For example, acetyl, benzoyl, formyl, pivaloyl etc. And alkoxycarbonyl groups (preferably C2-C20, More preferably, it is C2-C16, Especially preferably, it is C2-C12, For example, methoxycarbonyl, ethoxycarbonyl, etc. are mentioned, An aryloxy carbonyl group (preferably Is C7-20, More preferably, it is C7-16, Especially preferably, it is C7-10, For example, Phenyloxycarbonyl etc. are mentioned, Acyloxy group (Preferably C2-20 More preferably, it is C2-C16, Especially preferably, it is C2-C10, For example, acetoxy, benzoyloxy, etc. are mentioned, Acylamino group (Preferably C2-C20, More preferably, C2-C16, Especially preferably, it is C2-C10, For example, acetylamino, benzoylamino, etc. are mentioned, The alkoxycarbonylamino group (Preferably C2-C20, More preferably, C2-C20) 16, especially wind Preferably it is C2-C12, For example, a methoxycarbonylamino etc. are mentioned, An aryloxycarbonylamino group (preferably C7-20, More preferably, it is C7-16, Especially preferably, C7-C12, a phenyloxycarbonylamino etc. are mentioned, for example, sulfonylamino group (preferably C1-C20, More preferably, it is C1-C16, Especially preferably, it is C1-C12 Methanesulfonylamino, benzenesulfonylamino, etc.), sulfamoyl group (preferably C0-20, more preferably C0-16, particularly preferably C0-12 For example, sulfamoyl, methyl sulfamoyl, dimethyl sulfamoyl, phenyl sulfamoyl, etc.), carbamoyl group (preferably C1-C20, More preferably, it is C1-C16, Especially preferably, Is 1 to 12 carbon atoms And, for example, carbamoyl, methylcarbamoyl, diethylcarbamoyl, phenylcarbamoyl and the like, an alkylthio group (preferably C1-20, more preferably C1-20) 16, particularly preferably 1 to 12 carbon atoms, for example, methylthio, ethylthio, and the like, and an arylthio group (preferably 6 to 20 carbon atoms, more preferably 6 to 16 carbon atoms), particularly preferred. Preferably it is C6-C12, a phenylthio etc. are mentioned, for example, a sulfonyl group (preferably C1-C20, More preferably, it is C1-C16, Especially preferably, it is C1-C12, For example, mesyl, tosyl, etc.), sulfinyl group (preferably C1-C20, More preferably, it is C1-C16, Especially preferably, it is C1-C12, For example, methanesulfinyl, Benzene sulfinyl, etc.), ureido group (preferably A small number of 1-20, More preferably, it is C1-C16, Especially preferably, it is C1-C12, For example, ureido, methylureido, phenylureido, etc. are mentioned, The phosphate amide group (preferably Is C1-C20, More preferably, it is C1-C16, Especially preferably, it is C1-C12, For example, diethyl phosphate amide, a phenyl phosphate amide, etc.), A hydroxy group, a mercapto group, Halogen Atoms (e.g., fluorine atoms, chlorine atoms, bromine atoms, iodine atoms), cyano groups, sulfo groups, carboxyl groups, nitro groups, hydroxamic acid groups, sulfino groups, hydrazino groups, imino groups, heterocyclic groups (preferably Is 1 to 30 carbon atoms, more preferably 1 to 12 carbon atoms, and as a hetero atom, for example, a nitrogen atom, an oxygen atom, a sulfur atom, specifically, for example, imidazolyl, pyridyl, quinolyl, furyl, piperi Dill, morpholino, benzooxazolyl, Benzimidazolyl, benzthiazolyl, etc.), silyl group (preferably C3-C40, more preferably C3-C30, especially preferably C3-C24, for example, trimethylsilyl And triphenylsilyl etc.) may be mentioned. These substituents may further be substituted.

Moreover, when there are two or more substituents, they may be same or different. Moreover, when possible, you may connect and form a ring.

In the said General formula (1), R <^1> represents a hydrogen atom or a substituent, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent.

R ¹ is preferably a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a hydroxy group or a halogen atom, and more preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxyl group or a halogen atom. More preferably, they are a methyl group, a methoxy group, a hydroxy group, a chlorine atom, and a bromine atom, Especially preferably, they are a methoxy group and a hydroxy group.

R <^2> represents a hydrogen atom or a substituent, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent.

R ² is preferably a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a hydroxy group or a halogen atom, more preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom, More preferably, they are a hydrogen atom, a methyl group, and a methoxy group, Especially preferably, they are a hydrogen atom.

R <^4> represents a hydrogen atom or a substituent, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent.

R ⁴ is preferably a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a hydroxy group or a halogen atom, more preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom, More preferably, they are a hydrogen atom, a methyl group, and a methoxy group, Especially preferably, they are a methoxy group.

R <^5> represents a hydrogen atom or a substituent, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent.

R ⁵ is preferably a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a hydroxy group or a halogen atom, and more preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxyl group or a halogen atom. More preferably, they are a hydrogen atom, a methyl group, a methoxy group, a hydroxyl group, and a chlorine atom, Especially preferably, they are a hydrogen atom, a methoxy group, a hydroxy group, Most preferably, they are a hydrogen atom.

R ⁶ , R ⁷ , R ⁹ and R ¹⁰ each independently represent a hydrogen atom or a substituent, and if possible, may further have a substituent, and the substituent T described above can be applied as such a substituent.

R ⁶ , R ⁷ , R ⁹ and R ¹⁰ are preferably each independently a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a hydroxy group or a halogen atom, and more preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a carbon number It is an alkoxy group, a hydroxyl group, a halogen atom of 1-4, More preferably, it is a hydrogen atom, a methyl group, a methoxy group, a hydroxyl group, a chlorine atom, Especially preferably, it is a hydrogen atom, a methoxy group, a hydroxyl group, Most preferably, a hydrogen atom to be.

In the general formula (1), R ³ represents a substituent other than a hydrogen atom, and preferably R ³ is preferably an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, an acyl group, an alkoxycarbonyl group or an acylamino group. , A hydroxy group, a halogen atom and a cyano group, more preferably an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 1 to 4 carbon atoms, an alkynyl group having 1 to 4 carbon atoms, an aryl group having 6 to 10 carbon atoms, and 1 to 4 carbon atoms. An alkoxy group, an acyl group having 1 to 4 carbon atoms, an alkoxycarbonyl group having 1 to 4 carbon atoms, an acylamino group having 1 to 4 carbon atoms, a chlorine atom, a fluorine atom, a cyano group, and more preferably a methyl group, an ethyl group, and n-propyl Group, n-butyl group, methoxy group, ethoxy group, n-propyl group, n-butoxy group, acetyl group, phenyl group, chlorine atom, cyano group, and particularly preferably methyl group, methoxy group and cyano group, most preferred Preferably a methoxy group.

R <^8> represents substituents other than a hydrogen atom, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent.

R ⁸ is preferably an alkyl group of 1 to 4 carbon atoms, an alkynyl group of 2 to 6 carbon atoms, an aryl group of 6 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms, an aryloxy group of 6 to 12 carbon atoms, or 2 to 12 carbon atoms. An alkoxycarbonyl group, an acylamino group having 2 to 12 carbon atoms, a cyano group or a halogen atom, more preferably an aryl group having 6 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkoxycarbonyl group having 2 to 12 carbon atoms, and a cyano group More preferably, they are a phenyl group, a methoxy group, an ethoxy group, n-propoxy group, a methoxycarbonyl group, an ethoxycarbonyl group, n-propoxycarbonyl group, and a cyano group.

R <^11> represents a hydrogen atom, an alkyl group, and an aryl group, and if possible, may further have a substituent and the above-mentioned substituent T can be applied as such a substituent. Moreover, when possible, you may form a ring by connecting with any one of R <^6> , R <^7> , R <^9> and R <^10> . R ¹¹ is preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 10 carbon atoms, more preferably a hydrogen atom and a methyl group, and particularly preferably a hydrogen atom.

Among the compounds represented by the formula (1), preferably, the compound is represented by the following formula (1-A).

[Formula 1-A]

(Wherein R ¹² represents an alkyl group. R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ and R ¹¹ are respectively represented by those of formula (1) and The same meaning, and the preferred range is also the same.

In general formula (1-A), R <^12> represents a C1-C12 alkyl group, and the alkyl group represented by R <^12> may be linear or branched, and may further have a substituent, Preferably it is C1-C12 An alkyl group of 12, more preferably an alkyl group of 1 to 8 carbon atoms, still more preferably an alkyl group of 1 to 6 carbon atoms, particularly preferably an alkyl group of 1 to 4 carbon atoms (e.g., a methyl group, an ethyl group, an n-propyl group, iso-propyl group, n-butyl group, iso-butyl group, tert-butyl group, etc. are mentioned).

Among the compounds represented by the formula (1), more preferably, the compound is represented by the following formula (1-B).

[Formula 1-B]

Wherein R ¹³ represents a hydrogen atom or an alkyl group. R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ and R ¹² are each represented by the formula (1-A ) And the same meaning as those in

In Formula (1-B), R ¹³ represents a hydrogen atom or an alkyl group, and the alkyl group may be linear or branched, and may further have a substituent. R ¹³ is preferably a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, still more preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms (for example, , Methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, iso-butyl group, tert-butyl group, and the like.), And particularly preferably a hydrogen atom or a methyl group.

Among the compounds represented by the formula (1), more preferably, the compound is represented by the following formula (1-C).

[Formula 1-C]

Wherein R ¹⁴ represents an alkyl group. R ² , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹² and R ¹³ are the same as those in the formula (1-B), respectively. Meaning, and the preferred range is also the same.)

In Formula (1-C), R ¹⁴ represents an alkyl group, and the alkyl group may be linear or branched, and may further have a substituent. R ¹⁴ is preferably an alkyl group having 1 to 8 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, still more preferably an alkyl group having 1 to 4 carbon atoms (eg, a methyl group, an ethyl group, an n-propyl group). and iso-propyl group, n-butyl group, iso-butyl group, tert-butyl group, etc.), Especially preferably, it is a methyl group.

Although the specific example is given and demonstrated in detail about the compound represented by General formula (1) below, this invention is not limited at all by the following specific examples.

The compound represented by General formula (1) of this invention can be synthesize | combined by the general amide reaction of substituted benzoic acid and a phenol derivative, and what kind of reaction may be used if it is an amide bond formation reaction. For example, after functional group conversion of substituted benzoic acid to an acid halide, the method of condensation with an aniline derivative, the method of dehydrating a substituted benzoic acid and aniline derivative using a condensing agent or a catalyst, etc. are mentioned.

Considering the production process, a method of condensing with phenol after converting the substituted benzoic acid into an acid halide is preferable.

As the reaction solvent, a hydrocarbon solvent (preferably toluene, xylene), an ether solvent (preferably dimethyl ether, tetrahydrofuran, dioxane, etc.), a ketone solvent, an ester solvent , Acetonitrile, dimethylformamide, dimethylacetamide and the like can be used. These solvent may be used individually or in mixture of multiple types, As a reaction solvent, Toluene, acetonitrile, dimethylformamide, and dimethylacetamide are preferable.

As reaction temperature, Preferably it is 0-150 degreeC, More preferably, it is 0-100 degreeC, More preferably, it is 0-90 degreeC, Especially preferably, it is 20 degreeC-90 degreeC.

It is preferable not to use a base for this reaction, and in the case of using a base, either an organic base or an inorganic base may be used, and preferably an organic base, and pyridine, tertiary alkylamine (preferably triethylamine, Ethyl diisopropylamine, etc.);

It is preferable to add 0.1-20 mass% of any 1 or more types of compounds represented by General formula (1) and general formula (1-A)-(1-C) of this invention with respect to a cellulose body, More preferably, it is 0.5 It is -16 mass%, More preferably, it is 1-12 mass%, Especially preferably, it is 2-8 mass%. Most preferably, it is 3-7 mass%.

[Cellulose Body Composition]

In the present invention, the cellulose body in the cellulose body composition refers to a compound having a cellulose skeleton obtained by introducing a functional group biologically or chemically from cellulose or cellulose as a raw material. As a compound which has a cellulose skeleton, Preferably it is a cellulose ester, More preferably, it is a cellulose acylate (cellulose triacylate, a cellulose acylate propionate, etc.). In addition, in this invention, you may mix and use another 2 or more types of cellulose acylate.

Hereinafter, this invention is demonstrated to the representative example which uses the cellulose acylate as a cellulose body.

Preferred cellulose acylates in the cellulose body include the following materials. That is, a cellulose acylate is a cellulose acylate which the substitution degree with respect to the hydroxyl group of cellulose satisfy | fills all following formula (I)-(III).

(I) 2.3 ≤ SA + SB ≤ 3.0

(II) 1.5 ≤ SA ≤ 3.0

(III) 0 ≤ SB ≤ 0.8

Here, in formula, SA and SB show the substitution degree of the acyl group substituted by the hydroxyl group of cellulose, SA is the substitution degree of an acetyl group, and SB is a substitution degree of the acyl group of 3 to 22 carbon atoms. The β-1 and 4-bonded glucose units constituting cellulose have free hydroxyl groups at the 2, 3 and 6 positions. A cellulose acylate is a polymer (polymer) which esterified some or all of these hydroxyl groups by the acyl group. Acyl substitution degree means the ratio (100% esterification is substitution degree 1) in which the cellulose is esterified about each of the 2nd, 3rd, and 6th positions. In this invention, the sum total of substitution degree of SA and SB of a hydroxyl group becomes like this. More preferably, it is 2.7-2.96, Especially preferably, it is 2.80-2.95. Moreover, substitution degree of SB is 0-0.8, especially 0-0.6. Further, SB is preferably at least 28% of the substituents of the 6-position hydroxyl group, more preferably at least 30% is the substituent of the 6-position hydroxyl group, more preferably 35% or more, particularly 40% or more of the 6-position hydroxyl group It is also preferable that it is a substituent of. Moreover, the sum total of substitution degree of SA and SB of 6-position of a cellulose acylate is 0.8 or more, Furthermore, 0.85 or more, Especially the cellulose acylate film which is 0.90 or more is mentioned.

In this invention, as an C3-C22 acyl group which shows said SB of a cellulose acylate, an aliphatic acyl group or an aromatic acyl group may be sufficient and it is not specifically limited. These are, for example, alkylcarbonyl esters, alkenylcarbonyl esters or aromatic carbonyl esters of cellulose, aromatic alkylcarbonyl esters, and the like, and may each further have a substituted group. Substituents representing these preferred SB include propionyl, butanoyl, heptanoyl, hexanoyl, octanoyl, decanoyl, dodecanoyl, tridecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, iso-butayl Noyl, pivaloyl, cyclohexanecarbonyl, oleoyl, benzoyl, naphthylcarbonyl, cinnamoyl group and the like. Among these, propionyl, butanoyl, dodecanoyl, octadecanoyl, pivaloyl, oleyl, benzoyl, naphthylcarbonyl, cinnamoyl and the like.

The basic principle of the method for synthesizing cellulose acylate is described in Migita et al., Pages 180-190 of wood chemistry (Kyoritsu Publication, 1968). A typical synthesis method is a liquid acetylation method using a carboxylic anhydride-acetic acid-sulfuric acid catalyst. Specifically, cellulose raw materials, such as cotton linter and wood pulp, are pretreated with an appropriate amount of acetic acid, and then charged into a pre-cooled carboxylic acid mixed solution to be esterified to form complete cellulose acylate (2, 3 and 6 positions). The sum of acyl substitution degree synthesizes almost 3.00). The carboxylic acid mixed solution generally contains acetic acid as a solvent, anhydrous carboxylic acid as an esterifying agent and sulfuric acid as a catalyst.

Anhydrous carboxylic acid is usually used in an excess amount stoichiometrically than the sum total of the cellulose which reacts with this, and the moisture which exists in a system. Neutralizing agents (e.g., carbonates of calcium, magnesium, iron, aluminum or zinc, acetates) for the hydrolysis of excess anhydrous carboxylic acid remaining in the system after the acylation reaction and for the neutralization of some of the esterification catalysts Or an aqueous solution of an oxide). Next, saponification-aging by maintaining the obtained complete cellulose acylate at 50 to 90 ° C in the presence of a small amount of acetylation reaction catalyst (usually remaining sulfuric acid) to change to cellulose acylate having a desired acyl substitution degree and polymerization degree. Let's do it. At the point when the desired cellulose acylate is obtained, the catalyst remaining in the system is neutralized completely using the neutralizing agent as described above, or the cellulose acylate solution is introduced into water or dilute sulfuric acid (or the cellulose acylate solution). Water or dilute sulfuric acid is added) to separate cellulose acylate, and cellulose acylate is obtained by washing and stabilizing treatment.

It is preferable that the cellulose acylate film of this invention consists of the cellulose acylate which the polymer component which comprises a film substantially has said definition. "Substantially" means 55 mass% or more (preferably 70 mass% or more, more preferably 80 mass% or more) of a polymer component. Remainder is a plasticizer, a ultraviolet absorber, etc. When preparing a cellulose composition etc. as a raw material of film manufacture, it is preferable to use the particle | grains of a cellulose acylate. It is preferable that 90 mass% or more of the particle | grains used have a particle diameter of 0.5-5 mm. Moreover, it is preferable that 50 mass% or more of the particle | grains used have a particle diameter of 1-4 mm. It is preferable that the cellulose acylate particles have a shape as close to a sphere as possible.

The polymerization degree of the cellulose acylate preferably used in the present invention is viscosity average polymerization degree 200 to 700, preferably 250 to 550, more preferably 250 to 400, and particularly preferably viscosity average polymerization degree 250 to 350. The average degree of polymerization can be measured by an intrinsic viscosity method such as Uda (Udakazuo, Saito Hideo, Textile Society, Vol. 18 No. 1, 105-120 pages, 1962). In addition, it describes in Unexamined-Japanese-Patent No. 9-95538 in detail.

When the low molecular weight component is removed, the average molecular weight (polymerization degree) increases, but the viscosity is useful because it is lower than the usual cellulose acylate. The cellulose acylate with few low molecular weight components can be obtained by removing the low molecular weight component from the cellulose acylate synthesized by a conventional method. The low molecular weight component can be removed by washing the cellulose acylate with a suitable organic solvent.

Moreover, when manufacturing the cellulose acylate with few low molecular components, it is preferable to adjust the amount of sulfuric acid catalysts in an acetylation reaction to 0.5-25 mass parts with respect to 100 mass parts of cellulose. When the amount of the sulfuric acid catalyst is in the above range, cellulose acylate (which has a uniform molecular weight distribution) can also be synthesized in terms of molecular weight distribution. When used in the preparation of the cellulose acylate of the present invention, the water content is preferably 2% by mass or less, more preferably 1% by mass or less, particularly preferably cellulose acylate having a moisture content of 0.7% by mass or less. . Generally, cellulose acylate contains water and 2.5-5 mass% is known. In this invention, in order to make water content of a cellulose acylate small, it is necessary to dry, and the method will not be specifically limited if it can be made into the target water content (for example, 2 mass% or less).

Such cellulose acylate of the present invention is described in detail in pages 7 to 12 of the raw material cotton and the synthetic method of the invention association publication publication (air number 2001-1745, issued March 15, 2001, the invention association). It is.

To the cellulose acylate film of the present invention, various additives (for example, a plasticizer, a sunscreen, a deterioration agent, an optically anisotropic control agent, fine particles, a peeling agent, an infrared absorber, etc.) according to the use can be added to each preparation step. These may be solid or oily. That is, it is not specifically limited in the melting point or boiling point. For example, it is mixing of the ultraviolet absorbing material of 20 degrees C or less and 20 degrees C or more, similarly the plasticizer mixing, etc., for example, are described in Unexamined-Japanese-Patent No. 2001-151901. Moreover, as an infrared absorbing dye, it is described, for example in Unexamined-Japanese-Patent No. 2001-194522. In addition, the addition time may be added at any time in the dope preparation process, and may add and add the process of adding and preparing an additive to the last preparation process of a dope preparation process.

In addition, the addition amount of each raw material is not specifically limited as long as a function is expressed. In addition, when a cellulose acylate film is formed in multiple layers, the kind and addition amount of the additive of each layer may differ. For example, although it is described in Unexamined-Japanese-Patent No. 2001-151902 etc., these are the techniques known conventionally.

And the details of these are preferably used as the materials described in detail in pages 16 to 22 of the Invention Association Publication (Publication No. 2001-1745, issued March 15, 2001, Invention Association).

The organic solvent in which the cellulose acylate of the present invention is dissolved is described.

First, it describes about the non-chlorine-type organic solvent used preferably in producing the solution of the cellulose acylate of this invention. In the present invention, in the range in which the cellulose acylate can be dissolved and cast and formed into a film, the non-chlorine organic solvent is not particularly limited as long as the object can be achieved. The non-chlorinated organic solvent used in the present invention is preferably a solvent selected from esters, ketones and ethers having 3 to 12 carbon atoms.

Ester, ketone, and ether may have a cyclic structure. Compounds having two or more functional groups of esters, ketones and ethers (ie, -O-, -CO- and -COO-) can also be used as the main solvent and have other functional groups such as, for example, alcoholic hydroxyl groups. You may also In the case of the main solvent which has two or more types of functional groups, the carbon atom number should just be in the defined range of the compound which has any one functional group.

Examples of esters having 3 to 12 carbon atoms include ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, and pentyl acetate. Examples of ketones having 3 to 12 carbon atoms include acetone, methyl ethyl ketone, diethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone. Examples of ethers having 3 to 12 carbon atoms include diisopropyl ether, dimethoxymethane, dimethoxyethane, 1,4-dioxane, 1,3-dioxolane, tetrahydrofuran, anisole and phentol. Can be. 2-ethoxyethyl acetate, 2-methoxyethanol, and 2-butoxyethanol are mentioned as an example of the organic solvent which has two or more types of functional groups.

The non-chlorine organic solvent used for the above cellulose acylate is selected from various viewpoints described above, but is preferably as follows. That is, the preferable solvent of the cellulose acylate of the present invention is a mixed solvent of three or more different kinds, and the first solvent is one selected from methyl acetate, ethyl acetate, methyl formate, ethyl formate, acetone, dioxolane and dioxane. The second solvent is selected from ketones or acetic acid esters having 4 to 7 carbon atoms, and selected from alcohols or hydrocarbons having 1 to 10 carbon atoms as the third solvent, and more preferably 1 carbon atom. It is alcohol of -8.

Moreover, when a 1st solvent is a liquid mixture of 2 or more types of solvents, a 2nd solvent may not be needed. More preferably, the first solvent is methyl acetate, acetone, methyl formate, ethyl formate or a mixture thereof, and the second solvent is preferably methyl ethyl ketone, cyclopentanone, cyclohexanone, or methyl acetyl acetate. The mixed liquid of may be sufficient.

The alcohol which is the third solvent is preferably linear, branched or cyclic, and particularly preferably saturated aliphatic hydrocarbon. The hydroxyl group of alcohol may be any of the 1st class-3rd class. Examples of alcohols include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, t-butanol, 1-pentanol, 2-methyl-2-butanol and cyclohexanol. Moreover, a fluorine-type alcohol is also used as alcohol. For example, 2-fluoroethanol, 2,2,2-trifluoroethanol, 2,2,3,3- tetrafluoro-1-propanol, etc. are mentioned.

Moreover, a hydrocarbon may be linear, may have a branch, and may be cyclic. Both aromatic hydrocarbons and aliphatic hydrocarbons can be used. Aliphatic hydrocarbons may be saturated or unsaturated. Examples of hydrocarbons include cyclohexane, hexane, benzene, toluene and xylene. The alcohol and hydrocarbon which are these 3rd solvents may be individual, or may be a mixture of 2 or more types, and is not specifically limited. Preferred specific compounds of the third solvent include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and cyclohexanol, cyclohexanoic acid, and hexane. Preferred are methanol, ethanol, 1-propanol, 2-propanol, 1-butanol.

It is preferable that the above three types of mixed solvent contain 20-95 mass% of 1st solvents, 2-60 mass% of 2nd solvents, and 2-30 mass% of 3rd solvents, More preferably, It is preferable that 30-90 mass% of 1st solvents, 3-50 mass% of 2nd solvents, and 3-25 mass% of 3rd solvents are alcohols. Moreover, it is preferable that especially the 1st solvent is 30-90 mass%, the 2nd solvent is 3-30 mass%, and the 3rd solvent is alcohol and 3-15 mass% is contained.

Moreover, when a 1st solvent is a liquid mixture and a 2nd solvent is not used, it is preferable to contain 20-90 mass% of a 1st solvent, and 5-30 mass% of a 3rd solvent, More preferably, It is preferable that a 1st solvent is 30-86 mass%, and a 3-25 solvent contains 7-25 mass%. The non-chlorine-based organic solvent used in the present invention described above is described in detail in pages 12 to 16 of the Invention Association Publication (Publication No. 2001-1745, issued March 15, 2001, Invention Association). Although the combination of the preferable non-chlorine organic solvent of this invention can be illustrated below, it is not limited to these.

Methyl acetate / acetone / methanol / ethanol / butanol (75/10/5/5/5 by mass),

Methyl acetate / acetone / methanol / ethanol / propanol (75/10/5/5/5 by mass),

Methyl acetate / acetone / methanol / butanol / cyclohexane (75/10/5/5/5 by mass),

Methyl acetate / acetone / ethanol / butanol (81/8/7/4, parts by mass)

Methyl acetate / acetone / ethanol / butanol (82/10/4/4, parts by mass)

Methyl acetate / acetone / ethanol / butanol (80/10/4/6 parts by mass)

Methyl acetate / methyl ethyl ketone / methanol / butanol (80/10/5/5 mass parts);

Methyl acetate / acetone / methylethyl ketone / ethanol / isopropanol (75/10/10/5/7, parts by mass)

Methyl acetate / cyclopentanone / methanol / isopropanol (80/10/5/8 mass parts),

Methyl acetate / acetone / butanol (85/5/5, parts by mass)

Methyl acetate / cyclopentanone / acetone / methanol / butanol (60/15/15/5/6, parts by mass)

Methyl acetate / cyclohexanone / methanol / hexane (70/20/5/5, parts by mass),

Methyl acetate / methyl ethyl ketone / acetone / methanol / ethanol (50/20/20/5/5, parts by mass);

Methyl acetate / 1,3 dioxolane / methanol / ethanol (70/20/5/5 by mass),

Methyl acetate / dioxane / acetone / methanol / ethanol (60/20/10/5/5, parts by mass),

Methyl acetate / acetone / cyclopentanone / ethanol / isobutanol / cyclohexane (65/10/10/5/5/5, parts by mass)

Methyl formate / methyl ethyl ketone / acetone / methanol / ethanol (50/20/20/5/5, parts by mass)

Methyl formate / acetone / ethyl acetate / ethanol / butanol / hexane (65/10/10/5/5/5, parts by mass)

Acetone / acetic acetate / methanol / ethanol (65/20/10/5, parts by mass),

Acetone / cyclopentanone / ethanol / butanol (65/20/10/5, parts by mass),

Acetone / 1,3-dioxolane / ethanol / butanol (65/20/10/5, parts by mass)

1,2-dioxolane / cyclohexanone / methylethylketone / methanol / butanol (55/20/10/5/5/5, parts by mass)

Etc. can be mentioned.

Moreover, a cellulose acylate solution can also be used by the following method.

In the dope used for this technique, in addition to the non-chlorine organic solvent of the said technique, you may contain dichloromethane 10 mass% or less of the quantity of all organic solvents.

In addition, in preparing the solution (composition liquid) of the cellulose acylate of this invention, a chlorine organic solvent is also used as a main solvent depending on a case, and it describes below. In the present invention, the chlorine-based organic solvent is not particularly limited as long as the object can be achieved in the range in which the cellulose acylate can be dissolved and cast and formed into a film. These chlorine organic solvents are preferably dichloromethane and chloroform. Dichloromethane is particularly preferred.

In addition, mixing of organic solvents other than chlorine-based organic solvents is not particularly a problem. In that case, 50 mass% or more of dichloromethane needs to be used. It describes below about the non-chlorine organic solvent used together of this invention. That is, as a preferable non-chlorine organic solvent, the solvent chosen from ester of 3-12 carbon atoms, ketone, ether, alcohol, hydrocarbon, etc. is preferable. The ester, ketone, ether and alcohol may have a cyclic structure. Compounds having two or more of functional groups of esters, ketones and ethers (ie, -O-, -CO- and -COO-) can also be used as the solvent, and have simultaneously other functional groups such as, for example, alcoholic hydroxyl groups. You may also In the case of the solvent which has two or more types of functional groups, the carbon atom number should just be in the defined range of the compound which has any one functional group. Examples of esters having 3 to 12 carbon atoms include ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, and pentyl acetate.

Examples of ketones having 3 to 12 carbon atoms include acetone, methyl ethyl ketone, diethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone. Examples of ethers having 3 to 12 carbon atoms include diisopropyl ether, dimethoxymethane, dimethoxyethane, 1,4-dioxane, 1,3-dioxolane, tetrahydrofuran, anisole and phentol. Can be. 2-ethoxyethyl acetate, 2-methoxyethanol, and 2-butoxyethanol are mentioned as an example of the organic solvent which has two or more types of functional groups.

Moreover, as alcohol used together with a chlorine organic solvent, Preferably, it may be linear, may have a branch, or may be cyclic, and it is especially preferable that it is a saturated aliphatic hydrocarbon. The hydroxyl group of alcohol may be any of the 1st class-3rd class. Examples of alcohols include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, t-butanol, 1-pentanol, 2-methyl-2-butanol and cyclohexanol. Moreover, a fluorine-type alcohol is also used as alcohol. For example, 2-fluoroethanol, 2,2,2-trifluoroethanol, 2,2,3,3- tetrafluoro-1-propanol, etc. are mentioned.

Moreover, a hydrocarbon may be linear, may have a branch, and may be cyclic. Both aromatic hydrocarbons and aliphatic hydrocarbons can be used. The aliphatic hydrocarbon may be saturated or unsaturated. Examples of hydrocarbons include cyclohexane, hexane, benzene, toluene and xylene.

Although it does not specifically limit about the non-chlorine organic solvent used together with the chlorine organic solvent which is a main solvent used with respect to the above-mentioned cellulose acylate, Methyl acetate, ethyl acetate, methyl formate, ethyl formate, acetone, dioxolane, dioxane, carbon It is selected from ketones or acetic acid ester of 4-7 atomic number, alcohol or hydrocarbon of 1-10 carbon atoms. Further preferred non-chlorine organic solvents used together are methyl acetate, acetone, methyl formate, ethyl formate, methyl ethyl ketone, cyclopentanone, cyclohexanone, methyl acetyl acetate, methanol, ethanol, 1-propanol, 2-propanol, 1 -Butanol, 2-butanol, cyclohexanol, cyclohexane, and hexane are mentioned. Although the following is mentioned as a combination of the chlorine type organic solvent which is a preferable main solvent of this invention, It is not limited to these.

ㆍ dichloromethane / methanol / ethanol / butanol (75/10/5/5/5, parts by mass),

Dichloromethane / acetone / methanol / propanol (80/10/5/5, parts by mass),

ㆍ dichloromethane / methanol / butanol / cyclohexane (75/10/5/5/5, parts by mass)

ㆍ dichloromethane / methylethylketone / methanol / butanol (80/10/5/5, parts by mass),

Dichloromethane / acetone / methylethylketone / ethanol / isopropanol (75/10/10/5/7, parts by mass)

Dichloromethane / cyclopentanone / methanol / isopropanol (80/10/5/8 mass parts),

Dichloromethane / methyl acetate / butanol (80/10/10 mass parts),

Dichloromethane / cyclohexanone / methanol / hexane (70/20/5/5, parts by mass),

ㆍ dichloromethane / methylethylketone / acetone / methanol / ethanol (50/20/20/5/5, parts by mass)

ㆍ dichloromethane / 1,3 dioxolane / methanol / ethanol (70/20/5/5, parts by mass),

ㆍ dichloromethane / dioxane / acetone / methanol / ethanol (60/20/10/5/5, parts by mass),

ㆍ dichloromethane / acetone / cyclopentanone / ethanol / isobutanol / cyclohexane (65/10/10/5/5/5, parts by mass),

ㆍ dichloromethane / methylethylketone / acetone / methanol / ethanol (70/10/10/5/5, parts by mass)

ㆍ dichloromethane / acetone / ethyl acetate / ethanol / butanol / hexane (65/10/10/5/5/5, parts by mass)

Dichloromethane / acetic acetate / methanol / ethanol (65/20/10/5, parts by mass),

ㆍ Dichloromethane / cyclopentanone / ethanol / butanol (65/20/10/5, parts by mass)

Etc. can be mentioned.

The cellulose acylate of the present invention is preferably dissolved in an organic solvent at a concentration of 10 to 30% by mass, more preferably at a concentration of 13 to 27% by mass, and particularly at a concentration of 15 to 25% by mass. It is preferable that it is a solution. The method of giving cellulose acylate to these concentrations may be carried out so as to be a predetermined concentration in the dissolving step, and further produced in advance as a low concentration solution (for example, 9 to 14 mass%), and then the predetermined high concentration in the concentration step described later. You may adjust with a solution. The cellulose acylate solution of a high concentration may be prepared in advance, and then, by adding various additives, the predetermined low concentration cellulose acylate solution may be used. If the cellulose acylate solution concentration of the present invention is achieved by any method, there is no particular problem.

In this invention, it is preferable that the aggregate molecular weight of the cellulose acylate which is a dilution solution which made the cellulose acylate solution 0.1-5 mass% with the organic solvent of the same composition is 150,000-15 million. More preferably, the association molecular weight is 180,000 to 9 million. This association molecular weight can be calculated | required by the static light scattering method. It is preferable to melt | dissolve so that the inertia square radius calculated | required at the time may be 10-200 nm. And the preferred inertia square is 20 to 200 nm. In addition, it is preferable to dissolve so that the second virtual coefficients are −2 × 10 ⁻⁴ to 4 × 10 ⁻⁴ , and more preferably, the second water coefficient is −2 × 10 ⁻⁴ to 2 × 10. ^-4 . Here, the definition of the association molecular weight in the present invention, and the inertia square radius and the second series coefficient will be described.

These were measured using the static light scattering method according to the following method. Although the measurement was made in the lean region on account of the apparatus, these measurements reflect the dope behavior in the high concentration region of the present invention. First, cellulose acylate was dissolved in the solvent used for dope, and the solution of 0.1 mass%, 0.2 mass%, 0.3 mass%, and 0.4 mass% was prepared. In addition, in order to prevent moisture absorption, the cellulose acylate was dried at 120 ° C. for 2 hours, and was carried out at 25 ° C. and 10% RH. The dissolution method was performed in accordance with the method (normal temperature dissolution method, cooling dissolution method, high temperature dissolution method) employed at the time of dope dissolution.

Then, these solutions and the solvent were filtered through a 0.2 μm Teflon filter. And static light scattering of the filtered liquid was measured at 30 degreeC from 30 degree | times to 140 degree | times in 25 degreeC using the light-scattering measuring apparatus (Otsuka Electronics Co., Ltd. product DLS-700). The obtained data was analyzed by the BERRY plot method. In addition, the refractive index required for this analysis uses the value of the solvent calculated | required with the Abbe refractometer, and the density | concentration gradient (dn / dc) of refractive index uses a differential refractometer (DRM-1021 by Otsuka Electronics Co., Ltd.) for light scattering measurement. It measured using the used solvent and solution.

Next, about the preparation of the cellulose acylate solution (dope) of this invention, the dissolution method is not specifically limited, Room temperature may be sufficient and it is performed by a cooling dissolution method, a high temperature dissolution method, or a combination thereof. As for these, Unexamined-Japanese-Patent No. 5-163301, Unexamined-Japanese-Patent No. 61-106628, Unexamined-Japanese-Patent No. 58-127737, Unexamined-Japanese-Patent No. 9-95544, Unexamined-Japanese-Patent No. Japanese Patent Application Laid-open No. Hei 10-95854, Japanese Patent Application Laid-open No. Hei 10-45950, Japanese Patent Application Laid-Open No. 2000-53784, Japanese Patent Application Laid-Open No. 11-322946, and Japanese Patent Application Laid-Open No. 11-322947 Japanese Patent Laid-Open No. 2-276830, Japanese Laid-Open Patent Publication No. 2000-273239, Japanese Laid-Open Patent Publication No. 11-71463, Japanese Laid-Open Patent Publication No. 04-259511, Japanese Laid-Open Patent Publication 2000-273184, Japanese Laid-Open Patent Publication Japanese Unexamined Patent Application Publication No. Hei 11-302388 discloses a method for preparing a cellulose acylate solution. As for the dissolution method of these cellulose acylates to the organic solvent described above, these techniques can be applied as long as they are within the scope of the present invention as appropriate.

These details are carried out by the method described in detail in pages 22 to 25 of the Invention Association Publication (Air No. 2001-1745, published March 15, 2001, Invention Association), particularly for non-chlorine solvent systems. do. In addition, solution concentration and filtration of the dope solution of the cellulose acylate of the present invention are usually carried out, and in detail, page 25 of the Invention Association Publication (Air No. 2001-1745, issued March 15, 2001, Invention Association) is described in detail. It is described. Moreover, when melt | dissolving at high temperature, it is the case of most than the boiling point of the organic solvent to be used, and in that case, it is used in a pressurized state.

It is preferable that the cellulose acylate solution of this invention is a range with the viscosity and the dynamic storage elastic modulus of this solution. 1 ml of the sample solution was measured on a rheometer (CLS 500) using a Steel Cone (both manufactured by TA Instruments) having a diameter of 4 cm / 2 °. The measurement conditions were measured by varying the range from 40 ° C to -10 ° C at 2 ° C / min by Oscillation Step / Temperature Ramp, and measured at 40 ° C for static non-Newtonian viscosity (n ^* (Pa · s)) and -5 ° C. The storage elastic modulus (G '(Pa)) was calculated | required. The sample solution was then insulated until the liquid temperature was constant at the measurement start temperature, and then the measurement was started. In this invention, the viscosity in 40 degreeC is 1-400 Pa.s, the dynamic storage modulus in 15 degreeC is 500 Pa or more, More preferably, the viscosity in 40 degreeC is 10-200 Pa.s. , The dynamic storage modulus at 15 ° C. is preferably 1 to 1 million. Moreover, it is preferable that the dynamic storage elastic modulus at low temperature is large, for example, when a flexible support body is -5 degreeC, it is preferable that dynamic storage elastic modulus is 10,000-1 million Pa at -5 degreeC, and when a support body is -50 degreeC As for the dynamic storage elastic modulus in -50 degreeC, 10,000-5 million Pa are preferable.

[Film Cellulose Film]

Next, the film containing any 1 or more types of compounds of the compound represented by General formula (1) and general formula (1-A)-(1-C) of this invention is demonstrated. The raw material of the film may be any compound as long as it is a compound capable of producing a film, but is preferably a polymer having a molecular weight of 5000 or more, for example, selected from polyester, polycarbonate, cycloolefin polymer, cellulose, and the like, more preferably cellulose, Cellulose esters are more preferred, in particular cellulose acylate.

Next, the manufacturing method is demonstrated to the example using the film which used the cellulose acylate solution as a film and the cellulose film of this invention.

As the method and equipment for producing the cellulose acylate film of the present invention, a solution casting film forming method and a solution casting film forming apparatus conventionally used in cellulose triacetate film production are used. The dope (cellulose acylate solution) prepared from the dissolving machine (kiln) is once stored in a storage kiln, and the air bubbles contained in the dope are defoamed to make final preparation. The dope is sent from the dope outlet to the press die through a pressurized metering gear pump capable of metering and feeding at high accuracy with rotational speed, for example, and the dope is continuously running from the detention (slit) of the press die. Uniformly pliable on the metal support, the less dry dope film (also called a web) is peeled from the metal support at a peeling point at which the metal support is almost round.

Both ends of the web obtained are clamped with a clip, conveyed with a tenter, and dried, maintaining width, then conveyed by the roll group of a drying apparatus, complete | finish drying, and wind up to a predetermined length with a winder. The combination of a tenter and the drying apparatus of a roll group changes with the objective. In the solution casting film forming method used for a silver halide photosensitive material and the functional protective film for electronic displays, in addition to a solution casting film forming apparatus, it is surface-processed to films, such as a lower layer, an antistatic layer, an antihalation layer, and a protective layer. In many cases, an application apparatus is added in order to make this possible. Each of these manufacturing processes is described in detail in pages 25 to 30 of the Invention Association published bulletin (air number 2001-1745, published March 15, 2001, Invention Association), and flexible (including covalent lead), metal It classified into support body, drying, peeling, extending | stretching, etc.

Here, although the space temperature of a flexible part is not specifically limited in this invention, It is preferable that it is -50- + 50 degreeC. Moreover, it is preferable that it is -30- + 40 degreeC, and it is especially preferable that it is -20- + 30 degreeC. In particular, the cellulose acylate solution softened by the space temperature at low temperature can be instantaneously cooled on the support to increase the gel strength, thereby maintaining the film containing the organic solvent. Thereby, it becomes possible to peel from a support body in a short time, without evaporating an organic solvent from a cellulose acylate, and high speed casting can be achieved. Moreover, as a means for cooling a space, normal air may be sufficient, nitrogen, argon, helium, etc. may be sufficient, and it is not specifically limited. In addition, the humidity in that case is preferably 0 to 70% RH, and more preferably 0 to 50% RH. Moreover, in this invention, the support body temperature of the flexible part which casts a cellulose acylate solution is -50-+130 degreeC, Preferably it is -30-+25 degreeC, More preferably, it is -20-+15 degreeC. In order to maintain a flexible part at the temperature of this invention, you may achieve by introducing the gas cooled to a flexible part, or you may arrange | position a cooling apparatus to a flexible part, and may cool a space. At this time, it is important to be careful that water does not adhere, and can be carried out by a method such as using a dried gas.

In the present invention, the following configurations are particularly preferable for the contents and the softness of the respective layers. That is, the cellulose acylate solution is a cellulose acylate solution containing 0.1 to 20% by mass of at least one liquid or solid plasticizer relative to the cellulose acylate at 25 ° C, and / or at least one liquid or solid It is a cellulose acylate solution containing 0.001-5 mass% of ultraviolet absorbers with respect to cellulose acylate, and / or 1 or more types of microparticles | fine-particles powder whose average particle diameter is 5-3000 nm is 0.001-1000 with respect to cellulose acylate. Cellulose acylate solution containing 5% by mass, and / or cellulose acylate solution containing 0.001-2% by mass of at least one fluorine-based surfactant based on cellulose acylate, and / or one or more Cellulose containing 0.0001-2 mass% of peeling agents with respect to cellulose acylate An acylate solution, and / or a cellulose acylate solution containing 0.0001 to 2% by mass of one or more deterioration inhibitors relative to cellulose acylate, and / or one or more optically anisotropic control agents to cellulose acylate It is a cellulose acylate solution containing 0.1-15 mass% with respect to a cellulose acylate, and / or the cellulose acylate solution containing 0.1-5 mass% of 1 or more types of infrared absorbers with respect to a cellulose acylate. Preferred are solutions and cellulose acylate films produced therefrom.

In the casting step, one type of cellulose acylate solution may be single layer cast or two or more types of cellulose acylate solutions may be simultaneously and / or sequentially covalently smoked. When it has a casting | flow_spread process which consists of two or more layers, in the cellulose acylate solution and cellulose acylate film produced, the composition of the chlorine-type solvent of each layer is the same or different, and the additive of each layer is 1 Of any kind, or of a mixture of two or more kinds, of which the position of addition of the additive to each layer is the same or of any of the other layers, the concentration of the additive in the solution of each layer being the same concentration, or any of the other concentrations One of which is the same or different of the molecular weight of the aggregates of each layer, the temperature of the solution of each layer is the same or different of the temperature, and the coating amount of each layer is the same or different Any one of application | coating amounts, the viscosity of each layer is the same, or any of the other viscosity, The film | membrane after drying of each layer Either of the same or different thicknesses, the material present in each layer being in the same state or distribution, or in a different state or distribution, in which the physical properties of each layer are the same or in different properties, each layer It is also preferable that it is a cellulose acylate solution and the cellulose acylate film produced from this solution characterized by the fact that the physical property of is either uniform or distribution of another physical property.

Here, the physical properties include the physical properties described in detail on pages 6 to 7 of the Invention Association published report (air number 2001-1745, published March 15, 2001, Invention Association), for example, haze and transmittance. , Spectral characteristics, retardation Re, copper Rth, molecular orientation axis, axis misalignment, tear strength, fracture strength, tensile strength, cold and external Rt difference, squeak, kinetic friction, alkali hydrolysis, curling value, moisture content, residual solvent amount And heat shrinkage rate, high humidity dimensional evaluation, water vapor transmission rate, planarity of the base, dimensional stability, heat shrinkage start temperature, elastic modulus, measurement of bright spot foreign matter, and the like.

In addition, the Yellow Paper Index, Transparency, and Thermal Properties (Tg, Heat of Crystallization) of cellulose acylate described in detail on page 11 of the Invention Association published bulletin (air number 2001-1745, issued March 15, 2001, Invention Association) Can be.

The cellulose acylate film may be surface-treated in some cases to achieve an improvement in adhesion between the cellulose acylate film and each functional layer (for example, an undercoat layer and a back layer). For example, glow discharge treatment, ultraviolet irradiation treatment, corona treatment, flame treatment, acid or alkali treatment can be used. The glow discharge treatment herein may be a low-temperature plasma occurring under a low pressure gas of 10 ⁻³ to 20 Torr, and also preferably a plasma treatment under atmospheric pressure.

The plasma excited gas refers to a gas that is plasma excited under the conditions described above, and examples thereof include argon, helium, neon, krypton, xenon, nitrogen, carbon dioxide, and freons such as tetrafluoromethane, and mixtures thereof. . As for these, the details are described in pages 30 to 32 of the invention association publication publication (air number 2001-1745, issued March 15, 2001, invention association). Moreover, the irradiation energy of 20-500 Kgy is used, for example under 10-1000 Kev, and the irradiation energy of 20-300 Kgy is used more preferably under 30-500 Kev for the plasma processing which is attracting attention recently. . Among these, especially preferably, it is an alkali saponification process and is very effective as a surface treatment of a cellulose acylate film.

An alkali saponification process is performed by apply | coating a saponification liquid. Examples of the coating method include a dip coating method, curtain coating method, extrusion coating method, bar coating method, and E type coating method. The solvent of the alkali saponification treatment coating liquid has good wettability in order to apply it to the transparent support of the saponification liquid, and selects a solvent which does not form irregularities on the transparent support surface by the saponification liquid solvent, and keeps the surface shape in good condition. It is preferable. Specifically, an alcoholic solvent is preferable and isopropyl alcohol is especially preferable.

Moreover, the aqueous solution of surfactant can also be used as a solvent. The alkali which the alkali saponification coating liquid dissolves in the said solvent is preferable, and KOH and NaOH are more preferable. 10 or more are preferable and, as for pH of saponification coating liquid, 12 or more are more preferable. 1 second or more and 5 minutes or less are preferable at room temperature, as for reaction conditions at the time of alkali saponification, 5 seconds or more and 5 minutes or less are more preferable, 20 seconds or more and 3 minutes or less are especially preferable. After the alkali saponification reaction, the saponified solution coated surface is preferably washed with water or acid and then washed with water.

Moreover, a coating type saponification process and the orientation film islands-state drawing mentioned later can be performed continuously, and the number of processes can be reduced.

In order to achieve adhesion between the film and the emulsion layer, after the surface activation treatment, the functional layer is directly applied onto the cellulose acylate film to obtain adhesive force, and after any surface treatment, or without surface treatment, There is a method of forming the undercoat layer (adhesive layer) and applying a functional layer thereon. Details of these undercoats are described on page 32 of the Invention Association Publication (Publication No. 2001-1745, issued March 15, 2001, Invention Association). The functional layers of the cellulose acylate film of the present invention are also described in detail in pages 32 to 45 of the Invention Association Publication (Publication No. 2001-1745, issued March 15, 2001, Invention Association). .

The use of the cellulose acylate produced in the present invention will first be briefly described. The optical film of this invention is especially useful as a support body for polarizing plate protective films, the optical compensation sheet of a liquid crystal display device, the optical compensation sheet of a reflective liquid crystal display device, and a halogenated silver photosensitive material.

Therefore, the thickness of the film of this invention is determined according to these uses, and there is no restriction | limiting in particular, Preferably it is 30 micrometers or more, More preferably, it is 30-200 micrometers.

When using as a polarizing plate protective film, the manufacturing method of a polarizing plate is not specifically limited, It can manufacture by a general method. There exists a method of alkali-processing the obtained cellulose acylate film, and attaching it to both surfaces of the polarizer produced by immersing and extending a polyvinyl alcohol film in the iodine solution using the fully saponified polyvinyl alcohol aqueous solution. Instead of alkali treatment, you may process the easily bonding described in Unexamined-Japanese-Patent No. 6-94915 and Unexamined-Japanese-Patent No. 6-118232. As an adhesive agent used for attaching a protective film process surface and a polarizer, polyvinyl alcohol adhesives, such as polyvinyl alcohol and polyvinyl butyral, vinyl latexes, such as butylacrylate, etc. are mentioned, for example. A polarizing plate is comprised from the polarizer and the protective film which protects both surfaces, Moreover, it is comprised by attaching a protective film to one surface of this polarizing plate, and attaching a separate film to the opposite surface. A protective film and a separate film are used for the purpose of protecting a polarizing plate at the time of a polarizing plate shipment, a product inspection, etc.

In this case, a protective film is affixed in order to protect the surface of a polarizing plate, and is used for the opposite surface side of the surface which affixes a polarizing plate with respect to a liquid crystal plate. Moreover, a separator film is used for the purpose of covering the adhesive layer adhering to a liquid crystal plate, and is used in the surface side which attaches a polarizing plate to a liquid crystal plate. Although the board | substrate containing a liquid crystal is normally arrange | positioned between two polarizing plates in a liquid crystal display device, even if it arrange | positions in any site | part, the polarizing plate protective film to which the optical film of this invention is applied is obtained. In particular, since a transparent hard coat layer, an antiglare layer, an antireflection layer, etc. are formed in the polarizing plate protective film of the display side outermost surface of a liquid crystal display device, it is especially preferable to use this polarizing plate protective film for this part.

The cellulose acylate film of this invention can be used for various uses, and when used as an optical compensation sheet of a liquid crystal display device, it is especially effective. The cellulose acylate film of this invention can be used for the liquid crystal cell of various display modes. Twisted Nematic (TN), In-Plane Switching (IPS), Ferroelectric Liquid Crystal (FLC), Anti-ferroelectric Liquid Crystal (AFLC), Optimal Compensatory Bend (OCB), Super Twisted Nematic (STN), Vertically Aligned (VA), and Various display modes such as HAN (Hybrid Aligned Nematic) have been proposed. Moreover, the display mode which orientation-divided the said display mode is also proposed.

A cellulose acylate film is effective also in the liquid crystal display device of any display mode. Moreover, it is effective also in all the liquid crystal display devices of a transmissive type, a reflective type, and a transflective type. You may use the cellulose acylate film of this invention as a support body of the optical compensation sheet of the TN type liquid crystal display device which has the liquid crystal cell of TN mode. You may use the cellulose acylate film of this invention as a support body of the optical compensation sheet of STN type liquid crystal display device which has the liquid crystal cell of STN mode.

Generally, in STN type liquid crystal display devices, the rod-like liquid crystalline molecules in the liquid crystal cell are twisted in the range of 90 to 360 degrees, and the product of the refractive index anisotropy (Δn) and the cell gap (d) of the rod-like liquid crystalline molecules (Δ nd) is in the range of 300-1500 nm. About the optical compensation sheet used for STN type liquid crystal display device, it describes in Unexamined-Japanese-Patent No. 2000-105316. The cellulose acylate film of this invention is used especially advantageously as a support body of the optical compensation sheet of VA type liquid crystal display device which has a liquid crystal cell of VA mode. The cellulose acylate film of this invention is advantageously used also as a support body of the optical compensation sheet of the OCB type liquid crystal display device which has a liquid crystal cell of 0CB mode, or the HAN type liquid crystal display device which has a liquid crystal cell of HAN mode.

The cellulose acylate film of this invention is advantageously used also as an optical compensation sheet of the reflection type liquid crystal display device of TN type, STN type, HAN type, and GH (Guest-Host) type. These display modes are well known since ancient times. As for the TN type reflective liquid crystal display device, there is a description in Japanese Unexamined Patent Publication Nos. Hei 10-123478, WO 9848320, and Japanese Patent No. 3022477. As for the optical compensation sheet used for the reflective liquid crystal display device, there is a description in WO 00-65384. The cellulose acylate film of this invention is advantageously used also as a support body of the optical compensation sheet of an ASM type liquid crystal display device which has a liquid crystal cell of ASM (Axially Symmetric Aligned Microcell) mode. The liquid crystal cell of ASM mode has the characteristic that the thickness of the cell is hold | maintained by the resin spacer which can be adjusted.

The other property is the same as that of the liquid crystal cell of TN mode. The liquid crystal cell of the ASM mode and the ASM type liquid crystal display device are described in Kume et al., SID 98 Digest 1089 (1998). The use of these detailed cellulose acylate films described above is described in detail in pages 45 to 59 of the Invention Association Publication (Publication No. 2001-1745, issued March 15, 2001, Invention Association).

Example

Next, although this invention is demonstrated further in detail based on an Example, this invention is not limited at all by the following Example.

First, the synthesis method of the compound of this invention is described concretely.

Synthesis Example 1: Synthesis of Exemplary Compound (A-13)

After heating 21.2 g (0.1 mol) of 2,4,5-trimethoxybenzoic acid, 80 ml of toluene, and 1 ml of dimethylformamide at 60 degreeC, 13.1 g (0.11 mol) of thionyl chlorides were dripped slowly, and it was 2 hours It heated at 65-70 degreeC. Then, the liquid which dissolved 14.8 g (0.12 mol) of 4-methoxyaniline and 13.2 g (0.13 mol) of triethylamine in 80 ml of acetonitriles was slowly dripped, and after completion | finish of dripping, it is 3 hours at 80-85 degreeC. It stirred by heating. After cooling the reaction liquid to room temperature, liquid separation was performed with ethyl acetate and water, and the obtained organic phase was removed with magnesium sulfate, and then the solvent was distilled off under reduced pressure, methanol was added, and recrystallization operation was carried out. The precipitated crystals were collected by filtration to obtain 24.0 g (yield 76%) of the title compound as white crystals.

Synthesis Example 2: Synthesis of Exemplary Compound (A-20)

19.3 g (0.10 mol) of 4- (n-butoxycarbonyl) aniline, 11.1 g (0.11 mol) of triethylamine, and 100 ml of acetonitrile were stirred at room temperature, and 116.5 g (0.1 mol) of 4-cyanobenzoic acid chloride The solution dissolved in 50 ml of acetonitrile was slowly added dropwise while cooling with ice water, and after the addition, the reaction solution was heated to reflux for 4 hours. Thereafter, the reaction solution was cooled to room temperature and added to 400 ml of water. The obtained crystals were collected by filtration, 300 ml of methanol and 50 ml of acetonitrile were added, and recrystallization operation was performed. The precipitated crystals were collected by filtration to give 21.1 g (yield 72%) of the title compound as white crystals.

Example 1

Each component of the following cellulose acetate solution composition was thrown into the mixing tank, and it stirred while heating, melt | dissolving each component, and prepared the cellulose acetate solution.

<Cellulose Acetate Solution Composition>

100 parts by mass of cellulose acetate having an acetylation degree of 60.9%

Triphenyl phosphate (plasticizer) 7.8 parts by mass

Biphenyl diphenyl phosphate (plasticizer) 3.9 parts by mass

318 parts by mass of methylene chloride (first solvent)

47 parts by mass of methanol (second solvent)

16 mass parts of the compound of this invention or the comparative compound, 87 mass parts of methylene chloride, and 13 mass parts of methanol were thrown into another mixing tank, and it stirred while heating, and prepared the retardation control agent solution.

36 mass parts of retardation control agent (synergist) solutions were mixed with 474 mass parts of cellulose acetate solutions, and it fully stirred, and dope was prepared. The retardation modifier described the quantity with respect to 100 mass parts of cellulose acetates in Table 1.

The obtained dope was cast using a band softener. The film with 15 mass% of residual solvents was transversely stretched at the draw ratio of 26% using the tenter on 150 degreeC conditions, and the cellulose acetate film (thickness: 92 micrometers) was produced. About the produced cellulose acetate film (optical compensation sheet), the Re-retardation value and Rth retardation value in wavelength 633nm were measured using the ellipsometer (M-150, Nippon Bunker Co., Ltd. product). The results are shown in Table 1.

<Measurement of Rth, Re>

Using the ellipsometer (AEP-10O, manufactured by Shimadzu Corporation), the film thickness of the film was obtained by multiplying the film thickness of the film by the difference in in-plane longitudinal and transverse measured at a wavelength of 632.8 nm.

Re = (nx-ny) × d

Rth = {(nx + ny) / 2-nz} × d

nx: refractive index in the slow axis direction (the direction in which the refractive index becomes maximum)

ny: refractive index in the direction orthogonal to the slow axis

nz: refractive index in the thickness direction

d: thickness of the film (unit: nm)

number Additive ¹⁾ Addition amount (mass part) Re (nm) Rth (nm) Re / Rth Optical performance evaluation ¹⁾ Remarks One Comparative Compound 1 5 35 180 0.22 × Comparative example 2 A-13 4 40 161 0.25

The present invention 3 A-13 5 45 173 0.26

The present invention 4 A-20 5 40 154 0.26

The present invention 5 A-20 6 49 188 0.26

The present invention

1) Optical Performance Evaluation (Re / Rth)

광학 성능 개량 효과가 보인다0.25 to 0.29

Optical performance improvement effect is seen

0.20 to 0.24 × lack of optical performance

Comparative Compound 1

As can be seen from the results of Table 1, the addition of the compound of the present invention allows the preparation of a novel cellulose film (highly Re expressive) having a large Re / Rth ratio, which was not realized in the known discotic compound (Comparative Compound 1). It became possible. Moreover, preparation of the cellulose film which has arbitrary Re / Rth ratio by the combination of the compound of this invention and the comparative compound 1 is attained.

The cellulosic composition of the present invention is useful for forming a film having high Re expressionability, and the film formed of the composition of the present invention is very excellent in optical performance.

Claims (9)

A cellulose body composition and the cellulose body composition characterized by containing 1 or more types of compounds represented by following General formula (1). [Formula 1]

(Wherein, R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁹ and R ¹⁰ each independently represent a hydrogen atom or a substituent, and R ³ and R ⁸ each represent a substituent other than a hydrogen atom. R ¹¹ represents a hydrogen atom, an alkyl group or an aryl group.) The cellulosic composition according to claim 1, wherein the compound represented by the formula (1) is represented by the following formula (1-A). [Formula 1-A]

(Wherein R ¹² represents an alkyl group. R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ and R ¹¹ are respectively represented by those of formula (1) and It is the same meaning.) The cellulosic composition according to claim 1, wherein the compound represented by the formula (1) is represented by the following formula (1-B). [Formula 1-B]

(Wherein R ¹² represents an alkyl group. R ¹³ represents a hydrogen atom or an alkyl group. R ² , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ and R ¹¹ each represent a chemical formula.) Same as those in (1).) The cellulosic composition according to claim 1, wherein the compound represented by the formula (1) is represented by the following formula (1-C). [Formula 1-C]

(Wherein R ¹² represents an alkyl group. R ¹³ represents a hydrogen atom or an alkyl group. R ¹⁴ represents an alkyl group. R ² , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ and R ¹⁰ Are the same as those in the formula (1), respectively.) The cellulose body film formed from the cellulose body composition of any one of Claims 1-4. The cellulose body film according to claim 5, wherein the cellulose body is cellulose acylate. The cellulosic film of Claim 5 which is an optical film. The cellulose body film of Claim 5 whose optical film is a polarizing plate protective film or an optical compensation sheet. It contains 1 or more types of compounds represented by General formula (1) of Claim 1, The film characterized by the above-mentioned.