JP2007002195A - Cellulose body composition, cellulose body film using the same, protective coat of polarizing plate, liquid crystal display device, silver halide photosensitive material, and modifier for cellulose body film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellulose body composition having small optical anisotropy and small chromatic dispersion of the optical anisotropy. <P>SOLUTION: The cellulose body composition contains a cellulose body and at least one compound represented by general formula (I) (wherein, X<SP>11</SP>, X<SP>12</SP>and X<SP>13</SP>are each independently a divalent linking group formed by one or more kinds selected from the group consisting of a single bond, -O-, -CO-, -NR<SP>11</SP>- (R<SP>11</SP>is an aliphatic or aromatic group), and a linking group formed out of an aliphatic group and an aromatic group; Y<SP>11</SP>, Y<SP>12</SP>and Y<SP>13</SP>are each independently a hydrogen atom or an ultraviolet-absorbing residue, with the proviso that at least one of the Y<SP>11</SP>, Y<SP>12</SP>and Y<SP>13</SP>is the ultraviolet-absorbing residue, and when Y<SP>11</SP>, Y<SP>12</SP>or Y<SP>13</SP>is the ultraviolet-absorbing residue, X<SP>11</SP>, X<SP>12</SP>or X<SP>13</SP>linking the ultraviolet-absorbing residue is a single bond). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cellulose body composition and a cellulose body film, and more specifically, a cellulose body film modifier that reduces changes in optical anisotropy and optical anisotropy due to wavelength, and a cellulose body containing the modifier. The present invention relates to a composition and a film thereof. The present invention further relates to a polarizing plate protective film, a liquid crystal display device and a silver halide photographic light-sensitive material using the cellulose body film.

  Conventionally, cellulose acylate films have been used for photographic supports and various optical materials because of their toughness and flame retardancy. In particular, in recent years, it has been widely used as an optical transparent film for liquid crystal display devices. Cellulose acylate films are excellent as optical materials for devices that handle polarized light such as liquid crystal display devices because of their high optical transparency and high optical isotropy. It has been used as a support for optical protective films that can improve the display (viewing angle compensation) viewed from an oblique direction.

  A polarizing plate, which is one of the members for a liquid crystal display device, has a polarizer protective film bonded to at least one side of the polarizer. A general polarizer is obtained by dyeing a stretched polyvinyl alcohol (PVA) film with iodine or a dichroic dye. In many cases, as a polarizer protective film, a cellulose acylate film, particularly a triacetyl cellulose film, which can be directly bonded to PVA is used. The optical characteristics of the protective film for the polarizer greatly affect the characteristics of the polarizing plate.

  In recent liquid crystal display devices, improvement in viewing angle characteristics is strongly demanded, and optical transparent films such as a protective film for a polarizer and a support for an optical compensation film are more optically isotropic. It is required to be sex. More optically isotropic (ie, small optical anisotropy) means that the retardation value represented by the product of birefringence and thickness of the optical film is small, and the retardation in the front direction (Re ) As well as retardation in the film thickness direction (Rth). In other words, when evaluating the display from an oblique direction, specifically when evaluating the optical properties of the optical transparent film, the Re measured from the front of the film is small, and the Re does not change even when measured at different angles. Required.

  So far, there has been a cellulose acylate film with a small Re on the front, but it was difficult to produce a cellulose acylate film with a small Re change with angle, that is, a small Rth. Therefore, an optical transparent film having a small Re angle change using a polycarbonate film or a thermoplastic cycloolefin film instead of the cellulose acylate film has been proposed (for example, Patent Documents 1 and 2, ZEONOR (Japan) Zeon) and ARTON (manufactured by JSR). However, when these optically transparent films are used as a protective film for a polarizer, there is a problem in bonding properties with PVA because the film is hydrophobic. There also remains a problem that the optical characteristics of the entire film surface are non-uniform.

  As a solution to this problem, it is strongly desired to improve the cellulose acylate film which is excellent in the bonding property to PVA by further reducing the optical anisotropy. Ideally, it is an optically isotropic optical transparent film in which Re on the front surface of the cellulose acylate film is almost zero and the change in retardation angle is small, that is, Rth is also almost zero.

  In the production of a cellulose acylate film, a compound called a plasticizer is generally added to improve the film forming performance. As types of plasticizers, phosphate triesters such as triphenyl phosphate and biphenyl diphenyl phosphate, phthalates, and the like are disclosed (for example, see Non-Patent Document 1). Among these plasticizers, those having the effect of reducing the optical anisotropy of the cellulose acylate film are known. For example, specific fatty acid esters are disclosed (for example, see Patent Document 3). ). However, the effect of reducing the optical anisotropy of cellulose acylate films using these conventionally known compounds is not sufficient.

  Furthermore, there has been a problem that the glass transition point of the cellulose acylate film is further lowered by increasing the amount of the plasticizer, and the dimensional stability is deteriorated by the softening of the film. In addition, low molecular weight plasticizers have high heat volatility due to their low molecular weight and have a problem of volatilization in the drying process at the time of production, which has been regarded as a problem as a main cause of process contamination.

  A technique for suppressing volatility by using a polymer compound such as a rosin resin, an epoxy resin, a ketone resin, and a toluenesulfonamide resin is known (for example, a patent) Reference 4). However, since it is a polymer plasticizer, the compatibility is not sufficient, and the compatibility as low molecular plasticizer cannot be obtained.

Also, recent liquid crystal display devices are required to improve display color. Therefore, an optical transparent film such as a protective film for a polarizer and a support for an optical compensation film not only reduces Re and Rth in the visible region of wavelength 400 to 800 nm, but also changes Re and Rth depending on the wavelength, that is, wavelength dispersion. It needs to be small.
JP 2001-318233 A JP 2002-328233 A JP 2001-247717 A JP 2002-146044 A Plastic Materials Course, Volume 17, Nikkan Kogyo Shimbun, “Fiber-Based Resin”, p. 121 (Showa 45)

An object of the present invention is to provide a cellulose composition and a cellulose film having a small optical anisotropy and a small optical anisotropy wavelength dispersion. In addition, the present invention is a cellulose body film modifier having a small volatilization amount when added to a cellulose body (in the present invention, a cellulose body film modifier is an additive which is added to a cellulose body to improve properties. For example, an additive for reducing optical anisotropy, a wavelength dispersion adjusting agent, etc.), a cellulose composition using the same, and a film thereof.
Furthermore, the present invention relates to a polarizing plate protective film, a liquid crystal display device, and a support for a silver halide photographic light-sensitive material prepared using a cellulose film having a small optical anisotropy and a small optical anisotropy wavelength dispersion. For the purpose of provision.

The 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 (I).

[Wherein X ¹¹ , X ¹² and X ¹³ are each independently a single bond, or —O—, —CO—, —NR ¹¹ — (R ¹¹ represents an aliphatic group or an aromatic group), and It represents a divalent linking group formed of one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent. Y ¹¹ , Y ¹² , and Y ¹³ each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ¹¹ , Y ¹² , and Y ¹³ is an ultraviolet absorbing residue. However, when Y ¹¹ , Y ¹² , or Y ¹³ is an ultraviolet absorbing residue, X ¹¹ , X ¹² , or X ¹³ linking the ultraviolet absorbing residue is a single bond. ]

(2) The cellulose composition according to (1), wherein the compound represented by the general formula (I) is a compound represented by the following general formula (II).

[Wherein, X ²¹ and X ²² are each independently a single bond, or —O—, —CO—, —NR ²² — (R ²² represents an aliphatic group or an aromatic group), and an aliphatic group or It represents a divalent linking group formed of one or more selected from the group consisting of linking groups formed from aromatic groups. The aliphatic group and the aromatic group may each independently have a substituent. Y ²¹ and Y ²² each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ²¹ and Y ²² is an ultraviolet absorbing residue. However, when Y ²¹ or Y ²² is an ultraviolet absorbing residue, X ²¹ or X ²² linking the ultraviolet absorbing residue is a single bond. ]

(3) At least one ultraviolet absorbing residue contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (III) as a basic structure. The cellulose composition according to (1) or (2), which is a group.

[Wherein, R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ and R ³⁹ each independently represent a hydrogen atom or a substituent. However, at a position where R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ , or R ³⁹ at any position is removed, it is represented by the general formula (I) or (II). And a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ , or X ²² in the compound to be linked. ]

(4) An ultraviolet-absorbing residue in which at least one of the ultraviolet-absorbing residues contained in the compound represented by the general formula (I) or (II) has a basic structure as a compound represented by the following general formula (IV) The cellulose composition according to (1) or (2), which is a group.

[Wherein, R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , and R ⁴⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , or R ⁴⁸ is removed at any position. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. ]

(5) At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (V) as a basic structure. The cellulose composition according to (1) or (2), which is a group.

[Wherein, R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , and R ⁵⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , or R ⁵⁸ is removed at any position. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. ]

(6) An ultraviolet-absorbing residue in which at least one of the ultraviolet-absorbing residues contained in the compound represented by the general formula (I) or (II) has a basic structure as a compound represented by the following general formula (VI) The cellulose composition according to (1) or (2), which is a group.

[Wherein, R ⁶¹ , R ⁶² , R ⁶³ , R ⁶⁴ , and R ⁶⁵ each independently represent a hydrogen atom or a substituent. However, single bonds X ¹¹ and X ^{12 in the} compound represented by the general formula (I) or (II) at a position where R ⁶¹ , R ⁶² , R ⁶³ , R ⁶⁴ , or R ⁶⁵ at any position is removed. , X ¹³ , X ²¹ , or X ²² . ]

(7) An ultraviolet-absorbing residue in which at least one of the ultraviolet-absorbing residues contained in the compound represented by the general formula (I) or (II) has a basic structure as a compound represented by the following general formula (VII) The cellulose composition according to (1) or (2), which is a group.

[Wherein, R ⁷¹ , R ⁷² , R ⁷³ , and R ⁷⁴ each independently represents a hydrogen atom or a substituent. Z ⁷¹ and Z ⁷² each independently represent a hydrogen atom, a substituent, or a group represented by the following general formula (VIII). However, in the position where R ⁷¹ , R ⁷² , R ⁷³ , R ⁷⁴ , Z ⁷¹ , Z ⁷² , R ⁷⁵ , R ⁷⁶ , R ⁷⁷ , R ⁷⁸ , or R ⁷⁹ at any position is removed, the general formula (I) or it shall be linked by a single bond ^X 11 in the compound represented by ^{(II), X 12, X} 13, X 21 or ^{X 22,.} ]

[Wherein, R ⁷⁶ , R ⁷⁷ , R ⁷⁸ and R ⁷⁹ each independently represent a hydrogen atom or a substituent, and R ⁷⁵ represents a hydrogen atom or an aliphatic group. Moreover, * represents the position couple | bonded with the ultraviolet absorptive residue represented by general formula (VII). ]

(8) Containing at least one compound represented by the general formula (I) or (II), comprising the cellulose composition according to any one of (1) to (7). Cellulosic film.

(9) The cellulose body film comprising the cellulose body composition according to any one of (1) to (7), wherein the cellulose body is cellulose acylate.

(10) Cellulose acylate and cellulose acylate comprising at least one compound represented by formula (I) or (II) in an amount of 0.1 to 30% by mass of cellulose acylate the film.

(11) The cellulose acylate (cellulose body) film according to the above (10), wherein the acyl substitution degree of the cellulose acylate is 2.60 to 3.00.

(12) The acyl substituent of cellulose acylate substantially consists of only an acetyl group, the total degree of substitution is 2.85 to 2.95, and the average degree of polymerization is 180 to 550. Cellulose acylate (cellulose body) film.

(13) The acyl substituent of the cellulose acylate is composed of at least two kinds selected from the group consisting of an acetyl group, a propionyl group, and a butanoyl group, and the total substitution degree is 2.50 to 3.00 ( The cellulose acylate (cellulose body) film as described in 10).

(14) A polarizing plate protective film comprising at least one layer of the cellulose film according to any one of (8) to (13).
(15) A liquid crystal display device comprising at least one layer of the cellulose film according to any one of (8) to (13).
(16) A silver halide photographic light-sensitive material, wherein the cellulose film according to any one of (8) to (13) is used as a support.
(17) A cellulose body film modifier comprising a compound represented by the following general formula (I) or (II).

[Wherein, X ¹¹ , X ¹² , and X ¹³ are each independently a single bond, or —O—, —CO—, —NR ¹¹ — (R ¹¹ represents an aliphatic group or an aromatic group), and It represents a divalent linking group formed of one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent. Y ¹¹ , Y ¹² and Y ¹³ each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ¹¹ , Y ¹² and Y ¹³ is an ultraviolet absorbing residue. However, when Y ¹¹ , Y ¹² , or Y ¹³ is an ultraviolet absorbing residue, X ¹¹ , X ¹² , or X ¹³ linking the ultraviolet absorbing residue is a single bond. ]

[Wherein, X ²¹ and X ²² are each independently a single bond, or —O—, —CO—, —NR ²² — (R ²² represents an aliphatic group or an aromatic group), and an aliphatic group or It represents a divalent linking group formed of one or more selected from the group consisting of linking groups formed from aromatic groups. The aliphatic group and the aromatic group may each independently have a substituent. Y ²¹ and Y ²² each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ²¹ and Y ²² is an ultraviolet absorbing residue. However, when Y ²¹ or Y ²² is an ultraviolet absorbing residue, X ²¹ or X ²² linking the ultraviolet absorbing residue is a single bond. ]

In the present invention, the ultraviolet-absorbing residue means a group of compounds that absorb ultraviolet rays of 200 to 400 nm, re-radiate the energy as harmless heat energy, and do not alter itself.
In the present invention, the ultraviolet absorbing residue having a compound as a basic structure means an ultraviolet absorbing residue having a monovalent substituent by removing a hydrogen atom or a substituent in the compound.

The cellulose composition of the present invention and the film thereof exhibit an excellent effect that the optical anisotropy and the change in optical anisotropy with wavelength are very small. Moreover, the cellulose body composition of this invention enables the improvement of the contamination of a manufacturing process by using the modifier for cellulose body films with a small volatilization amount.
Furthermore, the cellulose body composition of the present invention can be used as a cellulose body film to make an excellent polarizing plate protective film, a liquid crystal display device, a silver halide photographic light-sensitive material, and the like.

  The cellulose body composition of the present invention includes a cellulose body and a compound represented by the general formula (I) or (II). Hereinafter, the compounds represented by formulas (I) and (II) will be described in detail.

In the compound represented by the general formula (I), X ¹¹ , X ¹² , and X ¹³ are each independently a single bond, or —O—, —CO—, —NR ¹¹ — (R ¹¹ is aliphatic. Represents a divalent linking group formed from one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The combination of the linking group is not particularly limited, but is preferably selected from the group consisting of —O—, —CO—, —NR ¹¹ —, and a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent (substituents include the substituent T described later). Y ¹¹ , Y ¹² , and Y ¹³ each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ¹¹ , Y ¹² , and Y ¹³ is an ultraviolet absorbing residue. However, when Y ¹¹ , Y ¹² , or Y ¹³ is an ultraviolet absorbing residue, X ¹¹ , X ¹² , or X ¹³ linking the ultraviolet absorbing residue is a single bond. When Y ¹¹ , Y ¹² , or Y ¹³ is a hydrogen atom, X ¹¹ , X ¹² , or X ¹³ linking the hydrogen atom is preferably a single bond, an aliphatic group, or an aromatic group.
Any substituent of Y ¹¹ , Y ¹² , or Y ¹³ may be a UV-absorbing residue, but preferably Y ¹¹ or Y ¹² is a UV-absorbing residue. Further, the compound represented by the general formula (I) may contain two or more ultraviolet absorbing residues, and in this case, the structures of the two ultraviolet absorbing residues are the same or different. May be.
X ¹³ is preferably a single bond, an aliphatic group or an aromatic group, and more preferably a single bond. Y ¹³ is preferably a hydrogen atom.

  Moreover, it is preferable that the compound represented by the said general formula (I) is a compound represented by the following general formula (II).

In the compound represented by the general formula (II), X ²¹ and X ²² are each independently a single bond, or —O—, —CO—, —NR ²² — (R ²² is an aliphatic group or an aromatic group. And a divalent linking group formed of one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The combination of the linking groups is not particularly limited, but is preferably selected from the group consisting of —O—, —CO—, —NR ²² —, and a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent (substituents include the substituent T described later). Y ²¹ and Y ²² each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ²¹ and Y ²² is an ultraviolet absorbing residue. However, when Y ²¹ or Y ²² is an ultraviolet absorbing residue, X ²¹ or X ²² linking the ultraviolet absorbing residue is a single bond. When Y ²¹ or Y ²² is a hydrogen atom, X ²¹ or X ²² linking the hydrogen atom is preferably an aliphatic group or an aromatic group, and more preferably an aromatic group.

The aliphatic group in the compound contained in the cellulose composition of the present invention will be described below.
The aliphatic group may be linear, branched or cyclic, and preferably has 1 to 25 carbon atoms, more preferably 1 to 20 carbon atoms, and more preferably 2 to 15 carbon atoms. Particularly preferred. Specific examples of the aliphatic group include, for example, methyl, ethyl, n-propyl, iso-propyl, cyclopropyl, n-butyl, iso-butyl, tert-butyl, amyl, iso-amyl, tert-amyl, n- Examples include hexyl, cyclohexyl, n-heptyl, n-octyl, bicyclooctyl, adamantyl, n-decyl, tert-octyl, dodecyl, hexadecyl, octadecyl, didecyl and the like.

The aromatic group in the compound contained in the cellulose composition of the present invention will be described below.
The aromatic group may be an aromatic hydrocarbon group or an aromatic heterocyclic group, and more preferably an aromatic hydrocarbon group. As the aromatic hydrocarbon group, those having 6 to 24 carbon atoms are preferable, and those having 6 to 12 carbon atoms are more preferable. Specific examples of the aromatic hydrocarbon group include benzene, naphthalene, anthracene, biphenyl, terphenyl and the like. As the aromatic hydrocarbon group, benzene, naphthalene, or biphenyl is particularly preferable. As the aromatic heterocyclic group, those containing at least one of an oxygen atom, a nitrogen atom, and a sulfur atom are preferable. Specific examples of the heterocyclic ring include, for example, furan, pyrrole, thiophene, imidazole, pyrazole, pyridine, pyrazine, pyridazine, triazole, triazine, indole, indazole, purine, thiazoline, thiadiazole, oxazoline, oxazole, oxadiazole, quinoline, Examples thereof include isoquinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, pteridine, acridine, phenanthroline, phenazine, tetrazole, benzimidazole, benzoxazole, benzthiazole, benzotriazole, tetrazaindene and the like. As the aromatic heterocyclic group, pyridine, triazine, or quinoline is particularly preferable.

  In the present invention, the ultraviolet-absorbing residue refers to a group of compounds that absorb ultraviolet rays of 200 to 400 nm, re-radiate the energy mainly as harmless heat energy, and do not alter itself. Preferred compounds as the ultraviolet absorbing residue include, for example, benzophenone compounds, benzotriazole compounds, cyanoacrylate compounds, salicylic acid ester compounds, hydroxyphenyl triazine compounds generally called ultraviolet absorbers, It is not limited to these compounds.

  As the ultraviolet absorbing residue in the compound represented by the above general formula (I) or (II), an ultraviolet absorbing residue having a basic structure of the compound represented by the following general formula (III) is preferable (this book In the present invention, an ultraviolet-absorbing residue having a compound as a basic structure means an ultraviolet-absorbing residue having a monovalent substituent by removing a hydrogen atom or a substituent in the compound).

In the general formula (III), R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ , and R ³⁹ each independently represent a hydrogen atom or a substituent. However, at a position where R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ , or R ³⁹ at any position is removed, it is represented by the general formula (I) or (II). And a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ , or X ²² in the compound to be linked. The substitution position to be linked is not particularly limited, but is preferably linked at the position of R ³¹ , R ³² , R ³³ , R ³⁷ or R ³⁸ , and more preferably the position of R ³¹ . Examples of the substituent include the substituent T described later.

  Further, as the ultraviolet absorbing residue in the compound represented by the general formula (I) or (II), an ultraviolet absorbing residue having a basic structure as the compound represented by the following general formula (IV) is also preferable.

In the general formula (IV), R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , and R ⁴⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , or R ⁴⁸ at any position is removed. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. The substitution position to be linked is not particularly limited, but is preferably linked at the position of R ⁴² , R ⁴⁶ or R ⁴⁷ , and more preferably the position of R ⁴⁶ or R ⁴⁷ . Examples of the substituent include the substituent T described later.

  Further, as the ultraviolet absorbing residue in the compound represented by the general formula (I) or (II), an ultraviolet absorbing residue having a compound represented by the following general formula (V) as a basic structure is also preferable.

In the general formula (V), R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , and R ⁵⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , or R ⁵⁸ is removed at any position. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. The substitution position to be linked is not particularly limited, but is preferably linked at the position of R ⁵⁵ or R ⁵⁶ , and more preferably at the position of R ⁵⁶ . Examples of the substituent include the substituent T described later.

  Further, as the ultraviolet absorbing residue in the compound represented by the above general formula (I) or (II), an ultraviolet absorbing residue having a compound represented by the following general formula (VI) as a basic structure is also preferable.

In the general formula (VI), R ⁶¹ , R ⁶² , R ⁶³ , R ⁶⁴ , and R ⁶⁵ each independently represent a hydrogen atom or a substituent. However, ^R 61 at any ^{position, R 62, R 63, R} 64 or at a point removed the ^{R 65,} the general formula (I) or a single bond ^X 11 in the compound represented by ^{(II),, X 12} , X ¹³ , X ²¹ , or X ²² . The substitution position to be linked is not particularly limited, but is preferably linked at the position of R ⁶¹ , R ⁶² , R ⁶³ or R ⁶⁴ , and more preferably the position of R ⁶¹ or R ⁶³ . Examples of the substituent include the substituent T described later.

  In addition, as an ultraviolet absorbing residue in the compounds represented by the general formula (I) and the general formula (II), an ultraviolet absorbing residue having a compound represented by the following general formula (VII) as a basic structure is also included. preferable.

In the general formula (VII), R ⁷¹ , R ⁷² , R ⁷³ , and R ⁷⁴ each independently represent a hydrogen atom or a substituent. Z ⁷¹ and Z ⁷² each independently represent a hydrogen atom, a substituent, or a group represented by the following general formula (VIII). However, in the position where R ⁷¹ , R ⁷² , R ⁷³ , R ⁷⁴ , Z ⁷¹ , Z ⁷² , R ⁷⁵ , R ⁷⁶ , R ⁷⁷ , R ⁷⁸ , or R ⁷⁹ at any position is removed, the general formula (I) or it shall be linked by a single bond ^X 11 in the compound represented by ^{(II), X 12, X} 13, X 21 or ^{X 22,.} ]

In the group represented by the general formula (VIII), R ⁷⁶ , R ⁷⁷ , R ⁷⁸ and R ⁷⁹ each independently represent a hydrogen atom or a substituent, and R ⁷⁵ represents a hydrogen atom or an aliphatic group. Moreover, * represents the position couple | bonded with the ultraviolet absorptive residue represented by general formula (VII).
In the general formula (VII) or (VIII), the substitution position to be linked is not particularly limited, but it is preferable to link ^at the position of R ⁷¹ , R ⁷³ , R ⁷⁷ or R ⁷⁸ .
Examples of the substituent include the substituent T described later.

The substituent T in the compound contained in the cellulose composition of the present invention will be described in detail.
The substituent T is preferably a halogen atom (for example, fluorine atom, chlorine atom, bromine atom, iodine atom), an alkyl group (preferably an alkyl group having 1 to 30 carbon atoms, such as a methyl group, an ethyl group, or an n-propyl group. , Isopropyl group, t-butyl group, n-octyl group, 2-ethylhexyl group), cycloalkyl group (preferably a substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, for example, cyclohexyl group, cyclopentyl group) 4-n-dodecylcyclohexyl group), a bicycloalkyl group (preferably a substituted or unsubstituted bicycloalkyl group having 5 to 30 carbon atoms, that is, one hydrogen atom is removed from a bicycloalkane having 5 to 30 carbon atoms. Monovalent groups such as bicyclo [1,2,2] heptan-2-yl, bicyclo [2,2 2] Octane-3-yl), an alkenyl group (preferably a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, such as a vinyl group or an allyl group), a cycloalkenyl group (preferably having 3 to 3 carbon atoms). 30 substituted or unsubstituted cycloalkenyl groups, that is, monovalent groups obtained by removing one hydrogen atom of a cycloalkene having 3 to 30 carbon atoms, for example, 2-cyclopenten-1-yl, 2-cyclohexene- 1-yl), a bicycloalkenyl group (substituted or unsubstituted bicycloalkenyl group, preferably a substituted or unsubstituted bicycloalkenyl group having 5 to 30 carbon atoms, that is, a hydrogen atom of a bicycloalkene having one double bond. A monovalent group removed, for example, bicyclo [2,2,1] hept-2-en-1-yl, bicyclo [2, , 2] oct-2-en-4-yl), an alkynyl group (preferably a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, such as an ethynyl group, a propargyl group), an aryl group (preferably carbon A substituted or unsubstituted aryl group having 6 to 30 atoms, such as a phenyl group, a p-tolyl group or a naphthyl group, a heterocyclic group (preferably a 5- or 6-membered substituted or unsubstituted aromatic or non-aromatic group) A monovalent group obtained by removing one hydrogen atom from the heterocyclic compound, more preferably a 5- or 6-membered aromatic heterocyclic group having 3 to 30 carbon atoms.

For example, a 2-furyl group, a 2-thienyl group, a 2-pyrimidinyl group, a 2-benzothiazolyl group), a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an alkoxy group (preferably a substitution of 1 to 30 carbon atoms or Unsubstituted alkoxy group such as methoxy group, ethoxy group, isopropoxy group, t-butoxy group, n-octyloxy group, 2-methoxyethoxy group), aryloxy group (preferably having 6 to 30 carbon atoms) A substituted or unsubstituted aryloxy group such as a phenoxy group, 2-methylphenoxy group, 4-tert-butylphenoxy group, 3-nitrophenoxy group, 2-tetradecanoylaminophenoxy group), silyloxy group (preferably, A silyloxy group having 3 to 20 carbon atoms, such as trimethylsilyloxy group, tert Butyldimethylsilyloxy group), heterocyclic oxy group (preferably a substituted or unsubstituted heterocyclic oxy group having 2 to 30 carbon atoms, 1-phenyltetrazol-5-oxy group, 2-tetrahydropyranyloxy group) An acyloxy group (preferably a formyloxy group, a substituted or unsubstituted alkylcarbonyloxy group having 2 to 30 carbon atoms, a substituted or unsubstituted arylcarbonyloxy group having 6 to 30 carbon atoms, such as a formyloxy group, Acetyloxy group, pivaloyloxy group, stearoyloxy group, benzoyloxy group, p-methoxyphenylcarbonyloxy group), carbamoyloxy group (preferably a substituted or unsubstituted carbamoyloxy group having 1 to 30 carbon atoms, such as N , N-dimethylcarbamoyloxy group, N, N A diethylcarbamoyloxy group, a morpholinocarbonyloxy group, an N, N-di-n-octylaminocarbonyloxy group, an Nn-octylcarbamoyloxy group), an alkoxycarbonyloxy group (preferably a substituent having 2 to 30 carbon atoms) Or an unsubstituted alkoxycarbonyloxy group, for example, a methoxycarbonyloxy group, an ethoxycarbonyloxy group, a tert-butoxycarbonyloxy group, an n-octylcarbonyloxy group, an aryloxycarbonyloxy group (preferably having 7 to 30 carbon atoms) A substituted or unsubstituted aryloxycarbonyloxy group,

For example, phenoxycarbonyloxy group, p-methoxyphenoxycarbonyloxy group, pn-hexadecyloxyphenoxycarbonyloxy group), amino group (preferably amino group, substituted or unsubstituted alkyl having 1 to 30 carbon atoms) An amino group, a substituted or unsubstituted anilino group having 6 to 30 carbon atoms, such as an amino group, a methylamino group, a dimethylamino group, an anilino group, an N-methyl-anilino group, a diphenylamino group), an acylamino group (preferably Is a formylamino group, a substituted or unsubstituted alkylcarbonylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted arylcarbonylamino group having 6 to 30 carbon atoms, such as a formylamino group, an acetylamino group, Pivaloylamino group, lauroylamino group, benzoylamino group An aminocarbonylamino group (preferably a substituted or unsubstituted aminocarbonylamino group having 1 to 30 carbon atoms such as carbamoylamino group, N, N-dimethylaminocarbonylamino group, N, N-diethylaminocarbonylamino group) , Morpholinocarbonylamino group), alkoxycarbonylamino group (preferably a substituted or unsubstituted alkoxycarbonylamino group having 2 to 30 carbon atoms, such as methoxycarbonylamino group, ethoxycarbonylamino group, tert-butoxycarbonylamino group, n -Octadecyloxycarbonylamino group, N-methyl-methoxycarbonylamino group), aryloxycarbonylamino group (preferably a substituted or unsubstituted aryloxycarbonylamino group having 7 to 30 carbon atoms, eg , Phenoxycarbonylamino group, p-chlorophenoxycarbonylamino group, mn-octyloxyphenoxycarbonylamino group), sulfamoylamino group (preferably substituted or unsubstituted sulfamoyl having 0 to 30 carbon atoms) Amino groups such as sulfamoylamino groups, N, N-dimethylaminosulfonylamino groups, Nn-octylaminosulfonylamino groups, alkyl and arylsulfonylamino groups (preferably substituted or substituted with 1 to 30 carbon atoms) Unsubstituted alkylsulfonylamino, substituted or unsubstituted arylsulfonylamino group having 6 to 30 carbon atoms, such as methylsulfonylamino group, butylsulfonylamino group, phenylsulfonylamino group, 2,3,5-trichlorophenylsulfonyl Amino group, p- Tilphenylsulfonylamino group), mercapto group, alkylthio group (preferably a substituted or unsubstituted alkylthio group having 1 to 30 carbon atoms, such as methylthio group, ethylthio group, n-hexadecylthio group), arylthio group (preferably carbon A substituted or unsubstituted arylthio group having 6 to 30 atoms such as phenylthio group, p-chlorophenylthio group, m-methoxyphenylthio group), heterocyclic thio group

(Preferably a substituted or unsubstituted heterocyclic thio group having 2 to 30 carbon atoms such as 2-benzothiazolylthio group and 1-phenyltetrazol-5-ylthio group), sulfamoyl group (preferably having 0 carbon atoms) -30 substituted or unsubstituted sulfamoyl groups such as N-ethylsulfamoyl group, N- (3-dodecyloxypropyl) sulfamoyl group, N, N-dimethylsulfamoyl group, N-acetylsulfamoyl group N-benzoylsulfamoyl group, N- (N′phenylcarbamoyl) sulfamoyl group), sulfo group, alkyl and arylsulfinyl group (preferably a substituted or unsubstituted alkylsulfinyl group having 1 to 30 carbon atoms, 6 ~ 30 substituted or unsubstituted arylsulfinyl groups such as methylsulfinyl , Ethylsulfinyl group, phenylsulfinyl group, p-methylphenylsulfinyl group), alkyl and arylsulfonyl groups (preferably substituted or unsubstituted alkylsulfonyl groups having 1 to 30 carbon atoms, substituted or unsubstituted groups having 6 to 30 carbon atoms) Arylsulfonyl group, for example, methylsulfonyl group, ethylsulfonyl group, phenylsulfonyl group, p-methylphenylsulfonyl group), acyl group (preferably formyl group, substituted or unsubstituted alkylcarbonyl group having 2 to 30 carbon atoms) A substituted or unsubstituted arylcarbonyl group having 7 to 30 carbon atoms, such as an acetyl group or a pivaloylbenzoyl group, an aryloxycarbonyl group (preferably a substituted or unsubstituted aryl having 7 to 30 carbon atoms) An oxycarbonyl group,

For example, phenoxycarbonyl group, o-chlorophenoxycarbonyl group, m-nitrophenoxycarbonyl group, p-tert-butylphenoxycarbonyl group), alkoxycarbonyl group (preferably substituted or unsubstituted alkoxycarbonyl having 2 to 30 carbon atoms) Group such as methoxycarbonyl group, ethoxycarbonyl group, tert-butoxycarbonyl group, n-octadecyloxycarbonyl group), carbamoyl group (preferably a substituted or unsubstituted carbamoyl group having 1 to 30 carbon atoms, such as carbamoyl Group, N-methylcarbamoyl group, N, N-dimethylcarbamoyl group, N, N-di-n-octylcarbamoyl group, N- (methylsulfonyl) carbamoyl group), aryl and heterocyclic azo group (preferably the number of carbon atoms 6-3 Substituted or unsubstituted arylazo group, substituted or unsubstituted heterocyclic azo group having 3 to 30 carbon atoms, such as phenylazo group, p-chlorophenylazo group, 5-ethylthio-1,3,4-thiadiazole-2 -Ylazo group), imide group (preferably N-succinimide group, N-phthalimide group), phosphino group (preferably substituted or unsubstituted phosphino group having 2 to 30 carbon atoms, such as dimethylphosphino group, Diphenylphosphino group, methylphenoxyphosphino group), phosphinyl group (preferably a substituted or unsubstituted phosphinyl group having 2 to 30 carbon atoms, such as phosphinyl group, dioctyloxyphosphinyl group, diethoxyphosphinyl group) Group), a phosphinyloxy group (preferably a substituted or unsubstituted group having 2 to 30 carbon atoms) A substituted phosphinyloxy group such as diphenoxyphosphinyloxy group, dioctyloxyphosphinyloxy group, phosphinylamino group (preferably a substituted or unsubstituted phosphinyl group having 2 to 30 carbon atoms) A ruamino group such as a dimethoxyphosphinylamino group or a dimethylaminophosphinylamino group, a silyl group (preferably a substituted or unsubstituted silyl group having 3 to 30 carbon atoms such as a trimethylsilyl group, tert- Butyldimethylsilyl group, phenyldimethylsilyl group).

  Among the above substituents, those having a hydrogen atom may be substituted with the above groups after removing this. Examples of such functional groups include an alkylcarbonylaminosulfonyl group, an arylcarbonylaminosulfonyl group, an alkylsulfonylaminocarbonyl group, and an arylsulfonylaminocarbonyl group. Examples thereof include a methylsulfonylaminocarbonyl group, a p-methylphenylsulfonylaminocarbonyl group, an acetylaminosulfonyl group, and a benzoylaminosulfonyl group.

  Moreover, when there are two or more substituents, they may be the same or different. If possible, they may be linked together to form a ring.

In the cellulose composition of the present invention, the amount of the compound represented by the general formula (I) or (II) (the total amount when adding a plurality of compounds) is 0 with respect to the mass of the cellulose body contained. It is preferably 0.01 to 30% by mass, more preferably 1 to 25% by mass, and particularly preferably 5 to 20% by mass.
About mixing with a cellulose body and the compound represented by general formula (I) or (II), it is the same as that of the addition mixing method of the wavelength dispersion regulator mentioned later.

  Next, preferred examples of the compound represented by formula (I) or (II) are shown below, but the present invention is not limited to these specific examples.

  The compound represented by the general formula (I) or (II) is, for example, an amine derivative having a UV-absorbing residue and a sulfonyl chloride derivative, an amine derivative and a sulfonyl chloride having a UV-absorbing residue, or each UV-absorbing property. It can be synthesized by a reaction between an amine derivative having a residue and a sulfonyl chloride derivative.

The cellulose body used in the cellulose body composition of the present invention will be described in detail.
In the present invention, the cellulose body means a compound having cellulose as a basic structure, and is not particularly limited, but among them, a cellulose ester is preferable, and a cellulose acylate is more preferable.

[Cellulose acylate raw material cotton]
The cellulose used as the raw material of the cellulose acylate preferably used in the cellulose composition of the present invention includes cotton linter and wood pulp (hardwood pulp, softwood pulp) and the like, and any cellulose acylate obtained from any raw material cellulose is used. In some cases, a mixture may be used. Detailed descriptions of these raw material celluloses are, for example, Plastic Materials Course (17) Fibrous resin (Maruzawa, Uda, Nikkan Kogyo Shimbun, published in 1970) and Invention Association Open Technical Report 2001-1745 (page 7). To page 8) can be used.

[Substitution degree of cellulose acylate]
The cellulose acylate preferably used in the cellulose composition of the present invention is one in which the hydroxyl group of cellulose is acylated, and the substituent is an acyl group having 2 carbon atoms from an acetyl group having 2 carbon atoms. Any of the above can be used. In the cellulose acylate of the present invention, the degree of substitution of cellulose with a hydroxyl group is not particularly limited, but the degree of binding of acetic acid and / or a fatty acid having 3 to 22 carbon atoms substituted with a hydroxyl group of cellulose is measured and substituted by calculation. You can get a degree. As a measuring method, it can carry out according to ASTM D-817-91.
Although the substitution degree of the hydroxyl group of cellulose is not particularly limited, the acyl substitution degree of the cellulose hydroxyl group is preferably 2.50 to 3.00, more preferably 2.75 to 3.00. .85 to 3.00 is particularly preferred.

Among the acetic acid and / or the fatty acid having 3 to 22 carbon atoms substituted for the hydroxyl group of cellulose, the acyl group having 2 to 22 carbon atoms may be an aliphatic group or an allyl group, and is not particularly limited. It may be a mixture of more than one type. These are, for example, cellulose alkylcarbonyl esters, alkenylcarbonyl esters, aromatic carbonyl esters, aromatic alkylcarbonyl esters, and the like, each of which may further have a substituted group. These preferred acyl groups include acetyl, propionyl, butanoyl, heptanoyl, hexanoyl, octanoyl, decanoyl, dodecanoyl, tridecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, iso-butanoyl, t-butanoyl, cyclohexanecarbonyl, Examples include oleoyl, benzoyl, naphthylcarbonyl, and cinnamoyl groups. Among these, acetyl, propionyl, butanoyl, dodecanoyl, octadecanoyl, t-butanoyl, oleoyl, benzoyl, naphthylcarbonyl, or cinnamoyl is preferable, and acetyl, propionyl, or butanoyl is more preferable.

  Among the acyl substituents substituted on the hydroxyl group of cellulose, in the case of consisting of at least two kinds substantially selected from an acetyl group, a propionyl group, and a butanoyl group, the total substitution degree is 2.50 to 3.00. It is preferable that 2.60 to 3.00 is more preferable, and 2.65 to 3.00 is particularly preferable.

[Degree of polymerization of cellulose acylate]
The degree of polymerization of cellulose acylate preferably used in the cellulose composition of the present invention is in the range of 180 to 700 in terms of viscosity average polymerization degree, more preferably 180 to 550, further preferably 180 to 400, and 180 to 350. Particularly preferred. If the degree of polymerization is too high, the viscosity of the cellulose acylate dope solution becomes high, and film production becomes difficult due to casting. If the degree of polymerization is too low, the strength of the produced film will decrease. The average degree of polymerization can be measured by Uda et al.'S intrinsic viscosity method (Kazuo Uda, Hideo Saito, Journal of Textile Society, Vol. 18, No. 1, pages 105-120, 1962). This is described in detail in JP-A-9-95538.
The molecular weight distribution of cellulose acylate preferably used in the cellulose composition of the present invention is evaluated by gel permeation chromatography, and its polydispersity index Mw / Mn (Mw is a mass average molecular weight, Mn is a number average molecular weight). ) Is small and the molecular weight distribution is preferably narrow. The specific value of Mw / Mn is preferably 1.0 to 3.0, more preferably 1.0 to 2.0, and particularly preferably 1.0 to 1.6. preferable.

  When the low molecular component is removed, the average molecular weight (degree of polymerization) increases, but the viscosity becomes lower than that of normal cellulose acylate, which is useful. Cellulose acylate having a small amount of low molecular components can be obtained by removing low molecular components from cellulose acylate synthesized by a usual method. The removal of the low molecular component can be carried out by washing the cellulose acylate with an appropriate organic solvent.

  In addition, when manufacturing a cellulose acylate with few low molecular components, it is preferable to adjust the sulfuric acid catalyst amount 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 within the above range, cellulose acylate that is preferable in terms of molecular weight distribution (uniform molecular weight distribution) can be synthesized. When used in the production 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, and particularly preferably 0.7% by mass or less. It is a cellulose acylate having a water content. In general, cellulose acylate contains water and is known to be 2.5 to 5% by mass. In order to obtain a preferable moisture content of cellulose acylate, it is necessary to dry, and the method is not particularly limited as long as the desired moisture content is obtained. These cellulose acylates of the present invention are described in detail on page 7 to page 12 of the raw material cotton and the synthesis method in the Japan Society for Invention and Technology (public technical number 2001-1745, published on March 15, 2001, Japan Society for Invention). It is described in.

  In the cellulose composition of the present invention, single or different two or more kinds of cellulose acylates can be mixed and used within the above-mentioned ranges such as substituent, substitution degree, polymerization degree, molecular weight distribution.

[Additive]
In the production of the cellulose composition of the present invention, in addition to the compound represented by the general formula (I) or (II) that reduces the optical anisotropy in each preparation step in the cellulose body (cellulose acylate) solution. Various additives (other compounds that reduce optical anisotropy, wavelength dispersion modifiers, UV inhibitors, plasticizers, deterioration inhibitors, fine particles, optical property modifiers, etc.) can be added depending on the application. . The addition timing may be added at any time in the dope preparation process, but may be performed by adding an additive to the final preparation process of the dope preparation process.

[Wavelength dispersion modifier]
A compound for reducing the wavelength dispersion of the cellulose film (hereinafter also referred to as a wavelength dispersion adjusting agent, unless otherwise specified, includes a compound represented by the general formula (I) or (II)) will be described.
The film comprising the cellulose composition of the present invention preferably has a small optical anisotropy, that is, a small value of Re and Rth, and Rth is preferably −25 to 25 nm, more preferably −25 to 10 nm. . Further, the change in optical anisotropy with wavelength, that is, the chromatic dispersion of Re and Rth (hereinafter referred to as ΔRe and ΔRth, respectively) is preferably small, and ΔRth is preferably −25 to 25 nm, and −20 to 20 nm. 20 nm is more preferable.

In order to improve the wavelength dispersion of Rth of the cellulosic film, a compound (wavelength dispersion adjusting agent) that reduces the wavelength dispersion (ΔRth) of Rth represented by the following formula (iv) is represented by the following formula (v), It is preferable to contain at least one kind within the range satisfying (vi).
(Iv) ΔRth = | Rth ₍₄₀₀₎ −Rth ₍₇₀₀₎ |
(V) (ΔRth (B) −ΔRth (0)) / B ≦ −2.0
(Vi) 0.01 ≦ B ≦ 30
The above formulas (v) and (vi) are: (v) (ΔRth (B) −ΔRth (0)) / B ≦ −3.0
(Vi) 0.05 ≦ B ≦ 25
More preferably,
(V) (ΔRth (B) −ΔRth (0)) / B ≦ −4.0
(Vi) 0.1 ≦ B ≦ 20
It is particularly preferred that Here, ΔRth (B) represents ΔRth (nm) of a film containing B% of a compound that lowers ΔRth, and ΔRth (0) represents ΔRth (nm) of a film that does not contain a compound that lowers ΔRth.

The chromatic dispersion adjusting agent has absorption in the ultraviolet region of 200 to ₄₀₀ nm, and ΔRe (| Re ₍₄₀₀₎ −Re ₍₇₀₀₎ |) and ΔRth (| Rth ₍₄₀₀₎ −Rth ₍₇₀₀₎ |) of the film. It is preferable that it is a compound which lowers | hangs.
In general, the Re and Rth values of the cellulose acylate film have a wavelength dispersion characteristic that the longer wavelength side is larger than the shorter wavelength side. Therefore, it is required to smooth the chromatic dispersion by increasing Re and Rth on the relatively short wavelength side. On the other hand, a compound having absorption in the ultraviolet region of 200 to 400 nm has a wavelength dispersion characteristic in which the absorbance on the long wavelength side is larger than that on the short wavelength side. If this compound itself is isotropically present inside the cellulose acylate film, it is assumed that the birefringence of the compound itself, and thus the wavelength dispersion of Re and Rth, is large on the short wavelength side as well as the wavelength dispersion of absorbance. .

Therefore, by using the above-described compound having absorption in the ultraviolet region of 200 to 400 nm and having the wavelength dispersion of Re and Rth of the compound itself assumed to be large on the short wavelength side, Re and Rth of the cellulose acylate film are used. Can be adjusted. For this purpose, the compound for adjusting the wavelength dispersion is required to be sufficiently homogeneously compatible with the cellulose acylate.
Therefore, regarding the ultraviolet-absorbing residue contained in the compound represented by the general formula (I) or (II) used in the cellulose body composition of the present invention, the absorption band range is preferably 200 to 400 nm, and 220 to 395 nm. Is more preferable, and 240 to 390 nm is particularly preferable.

In recent years, liquid crystal display devices such as televisions, notebook personal computers, and mobile portable terminals have been required to have excellent transmittance of optical members used in liquid crystal display devices in order to increase luminance with less power. In that respect, it has absorption in the ultraviolet region of 200 to ₄₀₀ nm and lowers ΔRe (| Re ₍₄₀₀₎ −Re ₍₇₀₀₎ |) and ΔRth (| Rth ₍₄₀₀₎ −Rth ₍₇₀₀₎ |) of the film. When a compound is added to a cellulose acylate film, it is required that the spectral transmittance is excellent. In the cellulose composition of the present invention, the film preferably has a spectral transmittance of 45% to 95% at a wavelength of 380 nm and a spectral transmittance of 10% or less at a wavelength of 350 nm.

  From the viewpoint of volatility, the wavelength dispersion adjusting agent including the compound represented by the general formula (I) or (II) preferably has a molecular weight of 250 to 1,000, more preferably 260 to 800, and 270 to 800. More preferred is 300 to 800. A specific monomer structure may be used as long as these molecular weights are within the range, and an oligomer structure or a polymer structure in which a plurality of the monomer units are bonded may be used.

It is preferable that the wavelength dispersion adjusting agent does not volatilize during the dope casting and drying process for producing the cellulose acylate film. The addition amount of the wavelength dispersion adjusting agent is preferably 0.01 to 30% by mass of cellulose acylate, more preferably 0.1 to 20% by mass, and 0.2 to 10% by mass. Is particularly preferred. These wavelength dispersion adjusting agents may be used alone or in combination of two or more compounds at an arbitrary ratio.
The timing of adding and mixing the wavelength dispersion adjusting agent may be any time during the dope preparation process, or may be performed at the end of the dope preparation process.

  Specific examples of the wavelength dispersion adjusting agent other than the compound represented by the general formula (I) or (II) include, for example, benzotriazole compounds, benzophenone compounds, compounds containing a cyano group, oxybenzophenone compounds, salicylic acid ester compounds. Compounds, nickel complex salt compounds and the like can be mentioned, but are not limited to these compounds.

[Matting agent fine particles]
It is preferable to add fine particles as a matting agent to the film made of the cellulose composition of the present invention. The fine particles used in the present invention include silicon dioxide, titanium dioxide, aluminum oxide, zirconium oxide, calcium carbonate, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, hydrated calcium silicate, aluminum silicate, silica Mention may be made of magnesium and calcium phosphates. Fine particles containing silicon are preferable in terms of low turbidity, and silicon dioxide is particularly preferable. The fine particles of silicon dioxide preferably have a primary average particle diameter of 20 nm or less and an apparent specific gravity of 70 g / liter or more. Those having an average primary particle size as small as 5 to 16 nm are more preferred because they can reduce the haze of the film. The apparent specific gravity is preferably 90 to 200 g / liter or more, and more preferably 100 to 200 g / liter or more. A larger apparent specific gravity is preferable because a high-concentration dispersion can be produced, and haze and aggregates are improved.

  These fine particles usually form secondary particles having an average particle diameter of 0.1 to 3.0 μm, and these fine particles are present as aggregates of primary particles in the film, and 0.1 to 0.1 μm on the film surface. An unevenness of 3.0 μm is formed. The secondary average particle size is preferably from 0.2 to 1.5 μm, more preferably from 0.4 to 1.2 μm, particularly preferably from 0.6 to 1.1 μm. The primary and secondary particle sizes were determined by observing the particles in the film with a scanning electron microscope and determining the diameter of a circle circumscribing the particles as the particle size. In addition, 200 particles were observed at different locations, and the average value was taken as the average particle size.

  As fine particles of silicon dioxide, for example, commercially available products such as Aerosil R972, R972V, R974, R812, 200, 200V, 300, R202, OX50, and TT600 (manufactured by Nippon Aerosil Co., Ltd.) can be used. Zirconium oxide fine particles are commercially available under the trade names of Aerosil R976 and R811 (manufactured by Nippon Aerosil Co., Ltd.) and can be used.

  Among them, Aerosil 200V and Aerosil R972V are fine particles of silicon dioxide having a primary average particle diameter of 20 nm or less and an apparent specific gravity of 70 g / liter or more, and the friction coefficient is maintained while keeping the turbidity of the optical film low. This is particularly preferable because the effect of reducing is great.

In order to obtain a film having particles having a small secondary average particle size, several methods are conceivable when preparing a dispersion of fine particles. For example, a method of preparing a fine particle dispersion in which a solvent and fine particles are stirred and mixed in advance, adding the fine particle dispersion to a small amount of a separately prepared cellulose acylate solution, stirring and dissolving, and further mixing with the main cellulose acylate dope solution There is. This method is a preferable preparation method in that the dispersibility of the silicon dioxide fine particles is good and the silicon dioxide fine particles are more difficult to reaggregate. In addition, a small amount of cellulose ester is added to the solvent, stirred and dissolved, and then the fine particles are added and dispersed with a disperser to make this fine particle additive solution. There is also a way to do it. The present invention is not limited to these methods, but the concentration of silicon dioxide when the silicon dioxide fine particles are mixed and dispersed with a solvent or the like is preferably 5 to 30% by mass, more preferably 10 to 25% by mass, and 15 to 20%. Mass% is most preferred. A higher dispersion concentration is preferable because the liquid turbidity with respect to the added amount is lowered, and haze and aggregates are improved. The addition amount of the matting agent in the final cellulose acylate dope solution is preferably 0.01 to 1.0 g, more preferably 0.03 to 0.3 g, and 0.08 to 0.16 g per 1 m ^2. Most preferred.

  The solvent used is preferably lower alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol and the like. Although it does not specifically limit as solvents other than a lower alcohol, It is preferable to use the solvent used at the time of film forming of a cellulose ester.

[Plasticizer, degradation inhibitor, release agent]
In addition to the above-mentioned compounds that optically reduce anisotropy and wavelength dispersion adjusting agents, the cellulose acylate film of the present invention includes various additives (for example, plasticizers, ultraviolet rays, etc.) in each preparation step. Inhibitors, deterioration inhibitors, release agents, infrared absorbers, etc.) can be added and they can be solid or oily. That is, the melting point and boiling point are not particularly limited. For example, mixing of ultraviolet absorbing material at 20 ° C. or lower and 20 ° C. or higher, and similarly, mixing of a plasticizer is described in, for example, Japanese Patent Application Laid-Open No. 2001-151901. Furthermore, infrared absorbing dyes are described, for example, in JP-A No. 2001-194522. Moreover, the addition time may be added at any time in the dope preparation process, but may be added by adding an additive to the final preparation process of the dope preparation process. Furthermore, the amount of each material added is not particularly limited as long as the function is manifested. Moreover, when a cellulose acylate film is formed from a multilayer, the kind and addition amount of the additive of each layer may differ. For example, it is described in Japanese Patent Application Laid-Open No. 2001-151902, and these are conventionally known techniques. For these details, materials described in detail on pages 16 to 22 in the Japan Institute of Invention Disclosure Technical Bulletin (Public Technical No. 2001-1745, published on March 15, 2001, Japan Institute of Invention) are preferably used.

[Rate of compound addition]
In the cellulose composition of the present invention, the total amount of compounds having a molecular weight of 3000 or less is preferably 5 to 45% based on the mass of the cellulose body. More preferably, it is 10 to 40%, and more preferably 15 to 30%. As described above, these compounds include compounds that reduce optical anisotropy, wavelength dispersion regulators, ultraviolet inhibitors, plasticizers, deterioration inhibitors, fine particles, release agents, infrared absorbers, etc. Is preferably 3000 or less, more preferably 2000 or less, and particularly preferably 1000 or less. When the total amount of these compounds is 5% or less, the properties of the cellulose acylate alone are likely to be produced, and there are problems such that the optical performance and physical strength are likely to fluctuate with changes in temperature and humidity. Moreover, when the total amount of these compounds is 45% or more, problems such as exceeding the limit of compound compatibility in the cellulose acylate film and depositing on the film surface to cause the film to become cloudy (crying out of the film) occur. It becomes easy.

[Organic solvent]
The cellulose composition of the present invention is preferably made into a cellulose acylate film by a solvent cast method, and can be produced as a film using a solution (dope) in which cellulose acylate is dissolved in an organic solvent. The organic solvent preferably used as the main solvent is preferably a solvent selected from esters, ketones, ethers having 3 to 12 carbon atoms, and halogenated hydrocarbons having 1 to 7 carbon atoms. Esters, ketones and ethers may have a cyclic structure. A compound having two or more functional groups of esters, ketones and ethers (that is, —O—, —CO— and —COO—) can also be used as a main solvent. It may have a functional group of In the case of the main solvent having two or more kinds of functional groups, the number of carbon atoms may be within the specified range of the compound having any functional group.
When the cellulose composition of the present invention is used as a film, a chlorinated halogenated hydrocarbon may be used as a main solvent, or as described in JIII Journal of Technical Disclosure 2001-1745 (pages 12 to 16). A non-chlorine solvent may be used as the main solvent and is not particularly limited.

In addition, the cellulose body composition of the present invention and the solvent for the film thereof are disclosed in the following patents, including the dissolution method, and are a preferred embodiment. They are, for example, JP 2000-95876, JP 12-95877, JP 10-324774, JP 8-152514, JP 10-330538, JP 9-95538, JP 9-95557, JP 10-10. -235664, JP-A-12-63534, JP-A-11-21379, JP-A-10-182853, JP-A-10-278056, JP-A-10-279702, JP-A-10-323853, JP-A-10-237186, JP-A-11-60807. JP-A-11-152342, JP-A-11-292988, JP-A-11-60752, JP-A-11-60752, and the like. According to these patent publications, not only the preferred solvent for the cellulose acylate of the present invention, but also the physical properties of the solution and coexisting substances to be coexisted are described, which is also a preferred embodiment in the present invention.

[Manufacturing process of cellulosic film]
[Dissolution process]
In the preparation of the solution (dope) in the cellulose composition of the present invention, the dissolution method is not particularly limited, and may be room temperature, or a cooling dissolution method or a high temperature dissolution method, or a combination thereof. In the cellulose body composition of the present invention, the preparation of the solution, and further the solution concentration and filtration steps involved in the dissolution step are disclosed in JIII Journal of Technical Disclosure (Publication No. 2001-1745, published on March 15, 2001). The manufacturing process described in detail on pages 22 to 25 in the Invention Association) is preferably used.

  In the cellulose composition of the present invention, the dope transparency of the solution is preferably 85% or more, more preferably 88% or more, and particularly preferably 90% or more. In the cellulose composition of the present invention, it is preferable to confirm that various additives are sufficiently dissolved in the solution. As a specific method for calculating the dope transparency, the dope solution can be injected into a 1 cm square glass cell, and the absorbance at 550 nm can be measured with a spectrophotometer (UV-3150, manufactured by Shimadzu Corporation). Only the solvent is measured in advance as a blank, and the transparency of the cellulose acylate solution can be calculated from the ratio to the absorbance of the blank.

[Casting, drying, winding process]
Next, in the cellulose composition of the present invention, a method for producing a film using the solution will be described. As a method and equipment for producing the cellulose composition of the present invention as a film, a solution casting film forming method and a solution casting film forming apparatus conventionally used for producing a cellulose triacetate film are used. The dope (cellulose acylate solution) prepared from the dissolving machine (kettle) is once stored in a storage kettle, and the foam contained in the dope is defoamed for final preparation. The dope is sent from the dope discharge port to the pressure die through a pressure metering gear pump capable of delivering a constant amount of liquid with high accuracy, for example, by the number of rotations, and the dope is run endlessly from the die (slit) of the pressure die. The dry-dried dope film (also referred to as web) is peeled off from the metal support at a peeling point that is uniformly cast on the metal support and substantially rounds the metal support. The both ends of the obtained web are sandwiched between clips, transported by a tenter while holding the width and dried, and then the obtained film is mechanically transported by a roll group of a drying device, dried, and then rolled by a winder Wind up to a predetermined length. The combination of the tenter and the roll group dryer varies depending on the purpose. In the solution casting film forming method used for the functional protective film and the silver halide photographic light-sensitive material, which are the main uses of the cellulosic film, as an optical member for electronic displays, in addition to the solution casting film forming apparatus, In many cases, a coating apparatus is added for surface processing on a film such as an undercoat layer, an antistatic layer, an antihalation layer, or a protective layer. These are described in detail on pages 25-30 in the Japan Society for Invention and Innovation Technical Report (Public Technical Number 2001-1745, issued on March 15, 2001, Japan Society for Invention). Including), metal support, drying, peeling and the like, and can be preferably used in the present invention.
Moreover, 10-120 micrometers is preferable, as for the thickness of a cellulose body film, 20-100 micrometers is more preferable, and 30-90 micrometers is especially preferable.

[Evaluation of physical properties of cellulose acylate film]
Regarding the change in optical performance due to the environmental change of the film comprising the cellulose composition of the present invention, Re and Rth of the film treated at 60 ° C. and 90% RH (in the present invention, RH means relative humidity) for 240 hours. Is preferably 15 nm or less, more preferably 12 nm or less, and particularly preferably 10 nm or less.
[Change in optical performance of film after high temperature treatment]
The amount of change in Re and Rth of the film treated at 80 ° C. for 240 hours is preferably 15 nm or less, more preferably 12 nm or less, and particularly preferably 10 nm or less.
[Compound volatilization after film heat treatment]
In the film comprising the cellulose composition of the present invention, the additive is preferably 30% or less, more preferably 0 to 25%, more preferably 0 to 20 in terms of the volatilization amount of the compound from the film treated at 80 ° C. for 240 hours. % Is particularly preferred. If the volatilization amount is too large, it becomes a main factor of process contamination and becomes a problem.
In addition, the amount of volatilization from the film is a compound in which a film treated at 80 ° C. for 240 hours and an untreated film are each dissolved in a solvent, a compound is detected by liquid high-speed chromatography, and the peak area of the compound remains in the film The amount can be calculated by the following formula.
Volatilization amount (%) = {(Amount of remaining compound in untreated product) − (Amount of remaining compound in treated product)} / (Amount of remaining compound in untreated product) × 100

[Glass Transition Temperature Tg of Film]
It is preferable that the glass transition temperature Tg of the film which consists of a cellulose body composition of this invention exists in the range of 80-165 degreeC, It is more preferable that Tg is 100-160 degreeC, It is 110-150 degreeC. Particularly preferred. The glass transition temperature Tg is measured with a differential scanning calorimeter (DSC2910, T.A. Instrument) measuring 10 mg of a film sample from room temperature to 200 ° C. at a temperature rising / falling rate of 5 ° C./min. Tg was calculated.

[Haze of film]
The haze of the film comprising the cellulose composition of the present invention is preferably 0.01 to 2.0%, more preferably 0.05 to 1.5%, and 0.1 to 1.0%. It is particularly preferred that As an optical film, the transparency of the film is important. The haze can be measured according to JIS K-6714 with a film sample of 40 mm × 80 mm at 25 ° C. and 60% RH with a haze meter (HGM-2DP, Suga Test Instruments).

[Humidity dependency of Re and Rth of film]
The film made of the cellulose composition of the present invention preferably has a small change due to humidity in the in-plane retardation Re and the retardation Rth in the film thickness direction. Specifically, the difference between the Rth value at 25 ° C. and 10% RH and the Rth value at 25 ° C. and 80% RH (Rth 10% RH−Rth 80% RH) is preferably 0 to 50 nm, more preferably 0 to 40 nm. 0 to 35 nm is particularly preferable.

[Equilibrium moisture content of film]
The equilibrium moisture content of the film comprising the cellulose composition of the present invention is not impaired when used as a protective film for a polarizing plate, regardless of the film thickness, so as not to impair the adhesion with a water-soluble polymer such as polyvinyl alcohol. The equilibrium water content at 25 ° C. and 80% RH is preferably 0 to 4%, more preferably 0.1 to 3.5%, and particularly preferably 1 to 3%. An equilibrium water content of 0.4% or more is not preferable because the dependence of retardation due to humidity changes becomes too large when used as a support for an optical compensation film.
As a method for measuring the moisture content, a film sample 7 mm × 35 mm can be measured by a Karl Fischer method using a moisture measuring device and a sample drying apparatus (CA-03, VA-05, both Mitsubishi Chemical Corporation). It can be calculated by dividing the amount of water (g) by the sample weight (g).

[Water permeability of film]
The moisture permeability of the film using the cellulose composition of the present invention as an optical compensation sheet is measured under the conditions of a temperature of 60 ° C. and a humidity of 95% RH based on JIS standard JISZ0208, and is converted to a film thickness of 80 μm from 400 to 400 μm. It is preferably 2000 g / m ² · 24 h. More preferably 500~1800g / m ² · 24h, and particularly preferably 600~1600g / m ² · 24h. If it exceeds 2000 g / m ² · 24 h, the tendency of the absolute value of the humidity dependence of the Re and Rth values of the film to exceed 0.5 nm /% RH becomes strong. In addition, even when an optically anisotropic layer is laminated on a film made of the cellulose composition of the present invention to form an optical compensation film, the absolute value of the humidity dependence of the Re value and Rth value is 0.5 nm /% RH. The tendency to exceed becomes strong and is not preferable. When this optical compensation sheet or polarizing plate is incorporated in a liquid crystal display device, it causes a change in color and a decrease in viewing angle. In addition, when the moisture permeability of the cellulose acylate film is less than 400 g / m ² · 24 h, when the polarizing plate is prepared by being attached to both surfaces of the polarizing film, the cellulose acylate film prevents the drying of the adhesive, and adhesion Cause a defect.
If the film thickness of the cellulose acylate film is thick, the moisture permeability becomes small, and if the film thickness is thin, the moisture permeability becomes large. Therefore, it is necessary to convert the sample of any film thickness to a standard of 80 μm. The conversion of the film thickness was obtained as (water permeability in terms of 80 μm = measured moisture permeability × measured film thickness μm / 80 μm).
The measurement method of moisture permeability is “Polymer Physical Properties II” (Polymer Experiment Course 4, Kyoritsu Shuppan), pages 285-294: Measurement of vapor permeation amount (mass method, thermometer method, vapor pressure method, adsorption amount method) The film sample 70 mmφ was conditioned at 25 ° C., 90% RH, 60 ° C., and 95% RH for 24 hours, respectively, and a moisture permeability test device (KK-70907, Toyo Seiki Co., Ltd.) was applied. ), The amount of water per unit area can be calculated (g / m ² ) in accordance with JIS Z-0208, and the water vapor transmission rate can be determined by the weight after humidity control-weight before humidity control.

[Dimensional change of film]
The dimensional stability of the film made of the cellulose composition of the present invention is such that the dimensional change rate is 90 ° C. and 5% RH when left standing at 60 ° C. and 90% RH for 24 hours (high humidity). When left standing under conditions for 24 hours (high temperature), the dimensional change rate is preferably 0.5% or less, more preferably 0.3% or less, and particularly preferably 0.15% or less.
As a specific measurement method, two film samples 30 mm x 120 mm were prepared, conditioned at 25 ° C and 60% RH for 24 hours, and an automatic pin gauge (Shinto Kagaku Co., Ltd.) with 6 mmφ holes at both ends. Is opened at an interval of 100 mm to obtain the original size (L0) of the punch interval. Punch interval size (L1) after one sample was treated at 60 ° C. and 90% RH for 24 hours, punch after one sample was treated at 90 ° C. and 5% RH for 24 hours The distance dimension (L2) can be measured. It is possible to measure to a minimum scale of 1/1000 mm in all intervals. Dimensional change rate of 60 ° C. and 90% RH (high humidity) = {| L0−L1 | / L0} × 100, Dimensional change rate of 90 ° C. and 5% RH (high temperature) = {| L0−L2 | / The dimensional change rate can be calculated as L0} × 100.

[Elastic modulus of film]
(Elastic modulus)
Elastic modulus of the film of cellulose composition of the present invention is preferably 200 to 500 kgf / mm ^2, more preferably 240~470kgf / mm ^2, particularly preferably at 270~440kgf / mm ² . As a specific measurement method, Toyo Baldwin Universal Tensile Tester STM T50BP is used to measure the stress at 0.5% elongation in a 23 ° C./70% atmosphere at a tensile rate of 10% / min to obtain the elastic modulus. be able to.

[Photoelastic coefficient of film]
(Photoelastic coefficient)
The photoelastic coefficient of the film made of the cellulose composition of the present invention is preferably 50 × 10 ⁻¹⁵ cm ² / dyne or less. It is more preferably 30 × 10 ⁻¹⁵ cm ² / dyne or less, and particularly preferably 20 × 10 ⁻¹⁵ cm ² / dyne or less. As a specific measuring method, a tensile stress is applied to the long axis direction of a film sample 12 mm × 120 mm, the retardation at that time is measured with an ellipsometer (M150, JASCO Corporation), and the retardation for the stress is measured. The photoelastic coefficient can be calculated from the amount of change.

[Front retardation change before and after stretching, detection of slow axis]
It is preferable to prepare a sample of 100 × 100 mm and perform stretching in the machine transport direction (MD direction) or the vertical direction (TD direction) using a fixed uniaxial stretching machine at a temperature of 140 ° C. The front retardation of each sample before and after stretching can be measured using an automatic birefringence meter KOBRA21ADH. The detection of the slow axis can be determined from the orientation angle obtained in the above-described retardation measurement. It is preferable that the change in Re by stretching is small. Specifically, in-plane front retardation (nm) of a film obtained by stretching Re (n) by n (%), in-plane of a film not stretched by Re (0) It is preferable to have | Re (n) −Re (0) | /n≦1.0 when the front retardation (nm) is satisfied, and | Re (n) −Re (0) | / n ≦ 0. 3 or less is more preferable.

[Direction with slow axis]
When the film comprising the cellulose composition of the present invention is used as a protective film for a polarizer, since the polarizer has an absorption axis in the machine transport direction (MD direction), the cellulose acylate film has a slow axis in the vicinity of the MD direction or It is preferably in the vicinity of TD. Light leakage and color change can be reduced by making the slow axis parallel or orthogonal to the polarizer. The vicinity means that the slow axis and the MD or TD direction are in the range of 0 to 10 °, preferably 0 to 5 °.

[Cellulose acylate film with positive intrinsic birefringence]
When the film comprising the cellulose composition of the present invention is stretched in a direction having a slow axis in the film plane, the front retardation Re increases, and when stretched in a direction perpendicular to the direction having the slow axis, the front retardation is obtained. Re becomes smaller. This indicates that the intrinsic birefringence is positive, and it is effective to stretch in the direction perpendicular to the slow axis in order to cancel the Re developed in the film. As this method, for example, when the film has a slow axis in the machine conveyance direction (MD direction), the front Re can be reduced by using tenter stretching in a direction perpendicular to MD (TD direction). It is done. As an opposite example, when the TD direction has a slow axis, it is conceivable that the front Re is made smaller by increasing the tension of the machine transport roll in the MD direction and stretching.

[Cellulose film with negative intrinsic birefringence]
When the film comprising the cellulose composition of the present invention is stretched in a direction having a slow axis, the front retardation Re is reduced, and when stretched in a direction perpendicular to the direction having a slow axis, the front retardation Re is increased. There is also. This indicates that the intrinsic birefringence is negative, and it is effective to stretch in the same direction as the slow axis in order to cancel out the Re developed in the film. As this method, for example, when the film has a slow axis in the machine conveyance direction (MD direction), the front Re can be reduced by increasing the tension of the machine conveyance roll in the MD direction and stretching. . As an opposite example, when the TD direction has a slow axis, it is conceivable to reduce the front Re by using tenter stretching in a direction perpendicular to the MD (TD direction).

[Method for evaluating cellulosic film]
As the evaluation of the cellulose body film of the present invention, each item can be measured by the following method.

(In-plane retardation Re, thickness direction retardation Rth)
Sample 30mm x 40mm is conditioned for 2 hours at 25 ° C and 60% RH, Re (λ) is an automatic birefringence meter KOBRA
In 21ADH (manufactured by Oji Scientific Instruments Co., Ltd.), light having a wavelength of λ nm can be incident in the normal direction of the film. Also, Rth (λ) is the Re (λ) and incident light of wavelength λnm with the in-plane slow axis as the tilt axis and the film normal direction as 0 °, and the sample tilted to 50 ° every 10 °. Based on the measured retardation value, it is possible to input and calculate the assumed average refractive index of 1.48 and the film thickness.

(Measurement of chromatic dispersion of Re and Rth)
A sample 30 mm × 40 mm was conditioned at 25 ° C. and 60% RH for 2 hours, and light with a wavelength of 780 nm to 380 nm was incident in the normal direction of the film on an ellipsometer M-150 (manufactured by JASCO Corporation). The Re chromatic dispersion can be measured by obtaining Re at each wavelength. Further, the wavelength dispersion of Rth was measured by introducing light having a wavelength of 780 to 380 nm from the direction inclined by + 40 ° with respect to the normal direction of the film with the slow axis in the plane as the tilt axis. The value and the retardation value measured by making light with a wavelength of 780 to 380 nm incident from a direction inclined by −40 ° with respect to the film normal direction with the in-plane slow axis as the tilt axis were measured in a total of three directions. Based on the retardation value, it can be calculated by inputting the assumed average refractive index of 1.48 and the film thickness.

(Molecular orientation axis)
The sample 70mm x 100mm was conditioned at 25 ° C and 65% RH for 2 hours, and the molecule was determined from the phase difference when the incident angle at normal incidence was changed with an automatic birefringence meter (KOBRA21DH, Oji Scientific Co., Ltd.). The orientation axis can be calculated.
(Axis misalignment)
Moreover, an axis | shaft misalignment angle can be measured with an automatic birefringence meter (KOBRA-21ADH, Oji Scientific Instruments). An average value of absolute values can be obtained by measuring 20 points at equal intervals over the entire width in the width direction. The range of the slow axis angle (axis deviation) is the measurement of 20 points at equal intervals over the entire width direction, and the difference between the average of the absolute value of the axis deviation and the average of the four points from the smaller absolute value. It is what took.

(Transmittance)
The transmittance of visible light (615 nm) can be measured on a sample 20 mm × 70 mm at 25 ° C. and 60% RH with a transparency measuring instrument (AKA phototube colorimeter, manufactured by Kotaki Seisakusho).
(Spectral characteristics)
A sample 13 mm × 40 mm can be measured for transmittance at a wavelength of 300 to 450 nm with a spectrophotometer (U-3210, manufactured by Hitachi, Ltd.) at 25 ° C. and 60% RH. The inclination width can be obtained at a wavelength of 72% −a wavelength of 5%. The limiting wavelength can be represented by a wavelength of (gradient width / 2) + 5%, and the absorption edge can be represented by a wavelength having a transmittance of 0.4%. From this, the transmittances at 380 nm and 350 nm can be evaluated.

[Film surface properties]
The film surface preferably has an arithmetic average roughness (Ra) of surface irregularities of the film based on JISB0601-1994 of 0.1 μm or less and a maximum height (Ry) of 0.5 μm or less. More preferably, the thickness (Ra) is 0.05 μm or less and the maximum height (Ry) is 0.2 μm or less. The concave and convex shapes on the film surface can be evaluated by an atomic force microscope (AFM).

[In-plane variation of retardation]
The cellulose acylate film of the present invention preferably satisfies the following formula.
| Re _(MAX) −Re _(MIN) | ≦ 3 and | Rth _(MAX) −Rth _(MIN) | ≦ 5
[In the formula, Re _(MAX) and Rth _(MAX) − are the maximum retardation values of 1 m square film cut out arbitrarily, and Re _(MIN) and Rth _(MIN) are the minimum values. ]

[Retention of film]
In the film made of the cellulose composition of the present invention, the retention of various compounds added to the film is required. Specifically, the mass change of the film when the cellulose acylate film of the present invention is allowed to stand for 48 hours under the condition of 80 ° C./90% RH is preferably 0 to 5%. More preferably, it is 0 to 3%, and particularly preferably 0 to 2%.
<Reservation evaluation method>
The sample was cut to a size of 10 cm × 10 cm, and the mass after being allowed to stand for 24 hours in an atmosphere of 23 ° C. and 55% RH was measured. The surface of the treated sample is lightly wiped, and the mass after standing for 1 day at 23 ° C. and 55% RH is measured, and the retention property can be calculated by the following method.
Retention property (mass%) = {(mass before leaving-mass after leaving) / mass before leaving} × 100

[Mechanical properties of film]
(curl)
The curl value in the width direction of the film is preferably −10 / m to + 10 / m. For the film comprising the cellulose composition of the present invention, the surface treatment described later, the rubbing treatment when applying the optically anisotropic layer, the alignment film, the application and bonding of the optically anisotropic layer are long. When performing with a scale, if the curl value in the width direction of the cellulose acylate film of the present invention is outside the above range, film handling may be hindered and the film may be cut. In addition, the film is strongly in contact with the transport roll at the edge and center of the film, so it is easy to generate dust, and foreign matter adheres to the film. May exceed the value. Further, by setting the curl in the above-mentioned range, it is possible to reduce color spot failures that are likely to occur when the optically anisotropic layer is installed, and it is possible to prevent bubbles from entering when the polarizing film is bonded, which is preferable.
The curl value can be measured according to a measurement method (ANSI / ASCPH1.29-1985) defined by the American National Standards Institute.

(Tear strength)
The tear strength (Elmendorf tear method) based on the tear test method of JIS K 7128-2: 1998 is preferably 2 g or more when the film thickness of the cellulose acylate film of the present invention is in the range of 20 to 80 μm. More preferably, it is 5-25g, Most preferably, it is 6-25g. Moreover, 8 g or more is preferable at 60 micrometer conversion, More preferably, it is 8-15g. Specifically, it can be measured using a light load tear strength tester after conditioning a sample piece of 50 mm × 64 mm under the conditions of 25 ° C. and 65% RH for 2 hours.

[Residual solvent amount of film]
It is preferable to dry on the conditions that the residual solvent amount with respect to a film becomes the range of 0.01-1.5 mass%. More preferably, it is 0.01-1.0 mass%. Curling can be suppressed by setting the residual solvent amount of the transparent support used in the present invention to 1.5% or less. More preferably, it is 1.0% or less. This is presumably because free deposition is reduced by reducing the amount of residual solvent during film formation by the above-described solvent casting method.

[Hygroscopic expansion coefficient of film]
The hygroscopic expansion coefficient of the film is preferably 30 × 10 ⁻⁵ /% RH or less. The hygroscopic expansion coefficient is preferably 15 × 10 ⁻⁵ /% RH or less, and more preferably 10 × 10 ⁻⁵ /% RH or less. Moreover, although the one where a hygroscopic expansion coefficient is smaller is preferable, it is a value of 1.0 * 10 < ^-5 > /% RH or more normally. The hygroscopic expansion coefficient indicates the amount of change in the length of the sample when the relative humidity is changed at a constant temperature. By adjusting this hygroscopic expansion coefficient, when a film comprising the cellulose composition of the present invention is used as an optical compensation film support, the frame-shaped transmittance increases while maintaining the optical compensation function of the optical compensation film, that is, Light leakage due to distortion can be prevented.

[surface treatment]
The cellulose acylate film can achieve improved adhesion between the cellulose acylate film and each functional layer (for example, the undercoat layer and the back layer) by optionally performing a surface treatment. For example, glow discharge treatment, ultraviolet irradiation treatment, corona treatment, flame treatment, acid or alkali treatment can be used. The glow discharge treatment here may be low-temperature plasma that occurs under a low pressure gas of 10 ^{−3 to} 20 Torr, and plasma treatment under atmospheric pressure is also preferred. A plasma-excitable gas is a gas that is plasma-excited under the above conditions, and examples thereof include chlorofluorocarbons such as argon, helium, neon, krypton, xenon, nitrogen, carbon dioxide, tetrafluoromethane, and mixtures thereof. It is done. Details of these are described in detail in pages 30 to 32 in the Japan Institute of Invention Disclosure Technical Bulletin (Public Technical Number 2001-1745, published on March 15, 2001, Japan Institute of Invention), and are preferably used in the present invention. be able to.

[Contact angle of film surface by alkali saponification]
Alkaline saponification is one effective means of surface treatment when the cellulose acylate film of the present invention is used as a transparent protective film for polarizing plates. In this case, the contact angle of the film surface after the alkali saponification treatment is preferably 55 ° or less. More preferably, it is 50 ° or less, and particularly preferably 45 ° or less. The contact angle evaluation method can be used as an evaluation of hydrophilicity / hydrophobicity by an ordinary method in which a water droplet having a diameter of 3 mm is dropped on the surface of the film after the alkali saponification treatment and the angle formed by the film surface and the water droplet is determined.

(Light resistance)
In the cellulose composition of the present invention, the color difference ΔE * ab of the film irradiated with super xenon light for 240 hours is preferably 20 or less as an index of light durability. More preferably, it is 18 or less, and it is especially preferable that it is 15 or less. For the measurement of the color difference, UV3100 (manufactured by Shimadzu Corporation) can be used. The measurement can be performed by adjusting the film to 25 ° C. and 60% RH for 2 hours or more and then measuring the color of the film before irradiation with xenon light to determine initial values (L0 ^* , a0 ^* , b0 ^* ). Thereafter, the film alone was irradiated with xenon light for 240 hours under conditions of 150 W / m ² , 60 ° C. and 50% RH with a super xenon weather meter SX-75 (manufactured by Suga Test Instruments Co., Ltd.) After the lapse of time, the film is taken out from the thermostatic chamber, adjusted to 25 ° C. and 60% RH for 2 hours, then subjected to color measurement again, and values after irradiation (L1 ^* , a1 ^* , b1 ^* ) can be obtained. From these, the color difference ΔE ^* ab = ((L0 ^* -L1 ^* ) ² + (a0 ^* -a1 ^* ) ² + (b0 ^* -b1 ^* ) ² ) ^0.5
Can be requested.

[Functional layer]
The film comprising the cellulose composition of the present invention is applied to optical applications and photographic light-sensitive materials. In particular, the optical application is preferably a liquid crystal display device, and the liquid crystal display device has a liquid crystal cell in which liquid crystal is supported between two electrode substrates, two polarizing elements disposed on both sides thereof, and the liquid crystal It is more preferable that at least one optical compensation sheet is disposed between the cell and the polarizing element. As these liquid crystal display devices, TN, IPS, FLC, AFLC, OCB, STN, ECB, VA and HAN are preferable.
In that case, when using the film which consists of a cellulose body composition of this invention for the above-mentioned optical use, providing various functional layers is implemented. These are, for example, an antistatic layer, a cured resin layer (transparent hard coat layer), an antireflection layer, an easy adhesion layer, an antiglare layer, an optical compensation layer, an alignment layer, a liquid crystal layer, and the like. Examples of these functional layers and materials thereof include surfactants, slip agents, matting agents, antistatic layers, hard coat layers, etc., and are disclosed by the Japan Institute of Technology (Technical Number 2001-1745, March 15, 2001). It is described in detail on pages 32 to 45 in the Japanese Society of Invention and Invention, and can be preferably used.

[Polarizer]
The cellulose composition of the present invention and the film thereof are useful for polarizing plate protective films. 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 is a method in which the obtained cellulose acylate film is treated with an alkali and bonded to both sides of a polarizer prepared by immersing and stretching a polyvinyl alcohol film in an iodine solution using a completely saponified polyvinyl alcohol aqueous solution. Instead of alkali treatment, easy adhesion processing as described in JP-A-6-94915 and JP-A-6-118232 may be performed.
Examples of the adhesive used to bond the protective film treated surface and the polarizer include polyvinyl alcohol adhesives such as polyvinyl alcohol and polyvinyl butyral, vinyl latexes such as butyl acrylate, and the like.
The polarizing plate is composed of a polarizer and a protective film that protects both surfaces of the polarizer, and further includes a protective film bonded to one surface of the polarizing plate and a separate film bonded to the other surface. The protective film and the separate film are used for the purpose of protecting the polarizing plate at the time of shipping the polarizing plate and at the time of product inspection. In this case, the protect film is bonded for the purpose of protecting the surface of the polarizing plate, and is used on the side opposite to the surface where the polarizing plate is bonded to the liquid crystal plate. Moreover, a separate film is used in order to cover the adhesive layer bonded to a liquid crystal plate, and is used for the surface side which bonds a polarizing plate to a liquid crystal plate.
In a liquid crystal display device, a substrate containing liquid crystal is usually disposed between two polarizing plates. However, a polarizing plate protective film to which the optical film of the present invention is applied can provide excellent display properties regardless of the location. . In particular, the polarizing plate protective film on the display side outermost surface of the liquid crystal display device is provided with a transparent hard coat layer, an antiglare layer, an antireflective layer, and the like.

[Optical compensation film]
The cellulose composition of the present invention and the film thereof can be used in various applications, and are effective when used as an optical compensation film for a liquid crystal display device. The optical compensation film is generally used for a liquid crystal display device and refers to an optical material that compensates for a retardation, and is synonymous with a retardation plate, an optical compensation sheet, and the like. The optical compensation film has birefringence and is used for the purpose of removing the color of the display screen of the liquid crystal display device or improving the viewing angle characteristics. When the cellulose-based composition film of the present invention is used as an optical compensation film, it is preferable that Re and Rth are 0 ≦ Re ≦ 10 nm and | Rth | ≦ 25 nm and the optical anisotropy is small, and ΔRe (| Re _{(400 )} −Re ₍₇₀₀₎ |) ≦ 10 nm and ΔRth (| Rth ₍₄₀₀₎ −Rth ₍₇₀₀₎ |) ≦ 35 nm are preferable. With such a film, no anisotropy occurs, and when an optically anisotropic layer having birefringence is used in combination, only the optical performance of the optically anisotropic layer can be exhibited.

Therefore, when the cellulose composition film of the present invention is used as an optical compensation film of a liquid crystal display device, Re and Rth of the optically anisotropic layer used in combination are Re = 0 to 200 nm and | Rth | = 0 to 400 nm. Any optically anisotropic layer within this range is preferable. The cellulosic material composition of the present invention and the optical performance and driving method of the liquid crystal cell of the liquid crystal display device in which the film is used are not limited, and any optically anisotropic layer required as an optical compensation film is used in combination. can do. The optically anisotropic layer used in combination may be formed from a composition containing a liquid crystalline compound or may be formed from a polymer film having birefringence.
The liquid crystal compound is preferably a discotic liquid crystal compound or a rod-like liquid crystal compound.

(Discotic liquid crystalline compounds)
Examples of discotic liquid crystalline compounds include various documents (C. Destrade et al., Mol. Crysr. Liq. Cryst., Vol. 71, page 111 (1981); edited by the Chemical Society of Japan, Quarterly Chemical Review, No. .22, Liquid Crystal Chemistry, Chapter 5, Chapter 10 Section 2 (1994); B. Kohne et al., Angew. Chem. Soc. Chem. Comm., Page 1794 (1985); J. Zhang et al. , J. Am. Chem. Soc., Vol. 116, page 2655 (1994)).

  In the optically anisotropic layer, the discotic liquid crystalline molecules are preferably fixed in an aligned state, and more preferably fixed by a polymerization reaction. The polymerization of discotic liquid crystalline molecules is described in JP-A-8-27284. In order to fix the discotic liquid crystalline molecules by polymerization, it is necessary to bond a polymerizable group as a substituent to the discotic core of the discotic liquid crystalline molecules. However, when the polymerizable group is directly connected to the disc-shaped core, it becomes difficult to maintain the orientation state in the polymerization reaction. Therefore, a linking group is introduced between the discotic core and the polymerizable group. JP-A-2001-4387 discloses a discotic liquid crystalline molecule having a polymerizable group.

(Bar-shaped liquid crystalline compound)
Examples of rod-shaped liquid crystalline compounds include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano substituted phenylpyrimidines, alkoxy substituted phenyl Pyrimidines, phenyldioxanes, tolans and alkenylcyclohexylbenzonitriles are included. Not only the above low-molecular liquid crystalline compounds but also high-molecular liquid crystalline compounds can be used.

  In the optically anisotropic layer, the rod-like liquid crystalline molecules are preferably fixed in an aligned state, and more preferably fixed by a polymerization reaction. Examples of the polymerizable rod-like liquid crystalline compound include Makromol. Chem. 190, 2255 (1989), Advanced Materials 5, 107 (1993), U.S. Pat. Nos. 4,683,327, 5,622,648, 5,770,107, International Publications WO95 / 22586, 95/24455, No. 97/00600, No. 98/23580, No. 98/52905, JP-A-1-272551, JP-A-6-16616, JP-A-7-110469, JP-A-11-80081, JP-A-2001-328773, etc. Are included.

(Optically anisotropic layer made of polymer film)
As described above, the optically anisotropic layer may be formed from a polymer film. The polymer film is formed from a polymer that can exhibit optical anisotropy. Examples of such polymers include polyolefins (eg, polyethylene, polypropylene, norbornene-based polymers), polycarbonate, polyarylate, polysulfone, polyvinyl alcohol, polymethacrylic acid ester, polyacrylic acid ester and cellulose ester (eg, cellulose triacetate). Tate, cellulose diacetate). Further, a copolymer or a polymer mixture of these polymers may be used.

  The optical anisotropy of the polymer film is preferably obtained by stretching. The stretching is preferably uniaxial stretching or biaxial stretching. Specifically, longitudinal uniaxial stretching using a difference in peripheral speed between two or more rolls, tenter stretching for grasping both sides of the polymer film and stretching in the width direction, or biaxial stretching in combination of these is preferable. In addition, using two or more polymer films, the optical properties of the entire two or more films may satisfy the above conditions. The polymer film is preferably produced by a solvent cast method in order to reduce unevenness in birefringence. The thickness of the polymer film is preferably 20 to 500 μm, and more preferably 40 to 100 μm.

  Further, as the polymer film forming the optically anisotropic layer, at least one polymer material selected from the group consisting of polyamide, polyimide, polyester, polyetherketone, polyamideimide polyesterimide, and polyaryletherketone is used. A method in which a solution in which is dissolved in a solvent is applied to a substrate and the solvent is dried to form a film can also be preferably used. At this time, a method of stretching the polymer film and the base material to develop optical anisotropy and using it as an optically anisotropic layer can be preferably used. The cellulose body composition of the present invention and the film thereof are It can be preferably used as a substrate. In addition, the polymer film is prepared on another substrate, and after the polymer film is peeled off from the substrate, it is bonded to the film made of the cellulose composition of the present invention, together with the optically anisotropic layer. It is also preferable to use as. In this method, the thickness of the polymer film can be reduced, and is preferably 50 μm or less, and more preferably 1 to 20 μm.

(General liquid crystal display device configuration)
When the cellulose acylate film is used as an optical compensation film, the transmission axis of the polarizing element and the slow axis of the optical compensation film made of the cellulose acylate film may be arranged at any angle. The liquid crystal display device includes a liquid crystal cell having a liquid crystal supported between two electrode substrates, two polarizing elements disposed on both sides thereof, and at least one sheet between the liquid crystal cell and the polarizing element. The optical compensation film is arranged.
The liquid crystal layer of the liquid crystal cell is usually formed by sealing liquid crystal in a space formed by sandwiching a spacer between two substrates. The transparent electrode layer is formed on the substrate as a transparent film containing a conductive substance. The liquid crystal cell may further be provided with a gas barrier layer, a hard coat layer, or an undercoat layer (undercoat layer) (used for adhesion of the transparent electrode layer). These layers are usually provided on the substrate. The substrate of the liquid crystal cell generally has a thickness of 50 μm to 2 mm.

(Types of liquid crystal display devices)
The cellulose composition of the present invention and the film thereof can be used for liquid crystal cells in various display modes. TN (Twisted Nematic), IPS (In-Plane Switching), FLC (Ferroelectric Liquid Crystal), AFLC (Anti-Ferroly Liquid Liquid Crystal), OCB (Optically Charged STP). Various display modes such as ECB (Electrically Controlled Birefringence) and HAN (Hybrid Aligned Nematic) have been proposed. In addition, a display mode in which the above display mode is oriented and divided has been proposed. The cellulose composition and the film thereof of the present invention are effective in any display mode liquid crystal display device. Further, it is effective in any of a transmissive type, a reflective type, and a transflective liquid crystal display device.

(TN type liquid crystal display device)
You may use the film which consists of a cellulose body composition of this invention as a support body of the optical compensation sheet | seat of a TN type | mold liquid crystal display device which has a TN mode liquid crystal cell. TN mode liquid crystal cells and TN type liquid crystal display devices have been well known for a long time. The optical compensation sheet used in the TN type liquid crystal display device is described in JP-A-3-9325, JP-A-6-148429, JP-A-8-50206, and JP-A-9-26572. Moreover, it is described in Mori et al. (Jpn. J. Appl. Phys. Vol. 36 (1997) p. 143 and Jpn. J. Appl. Phys. Vol. 36 (1997) p. 1068). is there.

(STN type liquid crystal display)
You may use the film which consists of a cellulose body composition of this invention as a support body of the optical compensation sheet | seat of the STN type liquid crystal display device which has a liquid crystal cell of STN mode. In general, in a STN type liquid crystal display device, rod-like liquid crystalline molecules in a liquid crystal cell are twisted in the range of 90 to 360 degrees, and the refractive index anisotropy (Δn) and cell gap (d) of the rod-like liquid crystalline molecules. Product (Δnd) is in the range of 300 to 1500 nm. The optical compensation sheet used for the STN type liquid crystal display device is described in JP-A-2000-105316.

(VA type liquid crystal display device)
The film comprising the cellulose composition of the present invention is particularly advantageously used as a support for an optical compensation sheet of a VA liquid crystal display device having a VA mode liquid crystal cell. It is preferable that the Re retardation value of the optical compensation sheet used in the VA liquid crystal display device is 0 to 150 nm and the Rth retardation value is 70 to 400 nm. The Re retardation value is more preferably 20 to 70 nm. When two optically anisotropic polymer films are used in the VA liquid crystal display device, the Rth retardation value of the film is preferably 70 to 250 nm. When one optically anisotropic polymer film is used for the VA liquid crystal display device, the Rth retardation value of the film is preferably 150 to 400 nm. The VA-type liquid crystal display device may be an alignment-divided system as described in, for example, JP-A-10-123576.

(IPS liquid crystal display device and ECB liquid crystal display device)
The film comprising the cellulose composition of the present invention is particularly suitable as a support for an optical compensation sheet of an IPS liquid crystal display device and an ECB liquid crystal display device having IPS mode and ECB mode liquid crystal cells, or as a protective film for a polarizing plate. It is advantageously used. In these modes, the liquid crystal material is aligned substantially in parallel during black display, and black is displayed by aligning liquid crystal molecules parallel to the substrate surface in the absence of voltage. In these embodiments, the polarizing plate using the cellulose acylate film of the present invention contributes to improving the color tone, widening the viewing angle, and improving the contrast. In this aspect, of the protective films for the polarizing plates above and below the liquid crystal cell, the protective film (the protective film on the cell side) disposed between the liquid crystal cell and the polarizing plate is made of the cellulose composition of the present invention. A polarizing plate using a film is preferably used on at least one side. An optically anisotropic layer is disposed between the protective film of the polarizing plate and the liquid crystal cell, and the retardation value of the disposed optically anisotropic layer is set to not more than twice the value of Δn · d of the liquid crystal layer. Is more preferable.

(OCB type liquid crystal display device and HAN type liquid crystal display device)
The film comprising the cellulose composition of the present invention is also advantageously used as a support for an optical compensation sheet of an OCB type liquid crystal display device having an OCB mode liquid crystal cell or a HAN type liquid crystal display device having a HAN mode liquid crystal cell. . In the optical compensation sheet used for the OCB type liquid crystal display device or the HAN type liquid crystal display device, it is preferable that the direction in which the absolute value of retardation is minimum does not exist in the plane of the optical compensation sheet or in the normal direction. The optical properties of the optical compensation sheet used in the OCB type liquid crystal display device or the HAN type liquid crystal display device are also the optical properties of the optically anisotropic layer, the optical properties of the support, and the optically anisotropic layer and the support. Is determined by the arrangement of An optical compensation sheet used for an OCB type liquid crystal display device or a HAN type liquid crystal display device is described in JP-A-9-197397. Moreover, it is described in a paper by Mori et al. (Jpn. J. Appl. Phys. Vol. 38 (1999) p. 2837).

(Reflective liquid crystal display)
The film comprising the cellulose composition of the present invention is also advantageously used as an optical compensation sheet for a reflective liquid crystal display device of TN type, STN type, HAN type, and GH (Guest-Host) type. These display modes have been well known since ancient times. The TN type reflection type liquid crystal display device is described in JP-A-10-123478, WO98848320, and Japanese Patent No. 3022477. The optical compensation sheet used in the reflective liquid crystal display device is described in WO00-65384.

(Other liquid crystal display devices)
The film comprising the cellulose composition of the present invention is also advantageously used as a support for an optical compensation sheet of an ASM type liquid crystal display device having a liquid crystal cell in ASM (Axial Symmetrical Microcell) mode. The ASM mode liquid crystal cell is characterized in that the thickness of the cell is maintained by a resin spacer whose position can be adjusted. Other properties are the same as those of the TN mode liquid crystal cell. The ASM mode liquid crystal cell and the ASM type liquid crystal display device are described in a paper by Kume et al. (Kume et al., SID 98 Digest 1089 (1998)).

(Hard coat film, antiglare film, antireflection film)
The film comprising the cellulose composition of the present invention can be preferably applied to a hard coat film, an antiglare film, and an antireflection film. For the purpose of improving the visibility of flat panel displays such as LCD, PDP, CRT, EL, etc., any one of a hard coat layer, an antiglare layer and an antireflection layer on one side or both sides of a film made of the cellulose composition of the present invention Or all can be provided. Preferred embodiments of such an antiglare film and antireflection film are described in detail in pages 54 to 57 of the Japan Institute of Invention and Technology (Publication No. 2001-1745, published on March 15, 2001, Japan Society of Invention). The cellulose acylate film of the present invention can be preferably used.

(Photo film support)
Furthermore, the cellulose composition of the present invention and the film thereof can be applied as a support for a silver halide photographic light-sensitive material, and the above-described various materials, formulations, and processing methods can be applied. Regarding these techniques, JP-A-2000-105445 describes in detail the color negative, and a film made of the cellulose composition of the present invention is preferably used. Further, application as a support for a color reversal silver halide photographic light-sensitive material is also preferable, and various materials, formulations and processing methods described in JP-A No. 11-282119 can be applied.

(Transparent substrate)
Since the film made of the cellulose composition of the present invention has an optical anisotropy close to zero and excellent transparency, it substitutes for a liquid crystal cell glass substrate of a liquid crystal display device, that is, encloses a driving liquid crystal. It can also be used as a transparent substrate.
Since the transparent substrate enclosing the liquid crystal needs to be excellent in gas barrier properties, a gas barrier layer may be provided on the surface of the cellulose acylate film of the present invention as necessary. The form and material of the gas barrier layer are not particularly limited, but SiO ₂ or the like is vapor-deposited on at least one surface of the cellulose acylate film of the present invention, or a relatively gas barrier property such as vinylidene chloride polymer or vinyl alcohol polymer. A method of providing a high polymer coat layer can be considered, and these can be used as appropriate.
In order to use as a transparent substrate for enclosing liquid crystal, a transparent electrode for driving the liquid crystal by applying a voltage may be provided. Although it does not specifically limit as a transparent electrode, A transparent electrode can be provided by laminating | stacking a metal film, a metal oxide film, etc. on the at least single side | surface of the film which consists of a cellulose body composition of this invention. Among these, a metal oxide film is preferable from the viewpoint of transparency, conductivity, and mechanical characteristics, and in particular, a thin film of indium oxide mainly containing tin oxide and 2 to 15% of zinc oxide can be preferably used. Details of these techniques are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2001-125079 and 2000-227603.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.

Example 1
(Synthesis Example 1) Synthesis of Exemplified Compound A-1 Exemplified Compound A-1 was synthesized according to the following scheme.

Synthesis of intermediate (T-1) 13.7 g of orthoaminobenzoic acid, 20.2 ml of pyridine, 200 ml of N, N-dimethylformamide (hereinafter also referred to as DMF) in a 500 ml three-necked flask equipped with a mechanical stirrer, thermometer and condenser Was weighed and stirred under ice cooling. To this, 20.0 g of paratoluenesulfonyl chloride was separately added so that the internal temperature did not exceed 10 ° C., and after addition, the mixture was further stirred at 15 ° C. or less for 1 hour. The reaction solution was carefully poured into 500 ml of 0.3N hydrochloric acid, and the resulting crystals were collected by filtration. After washing with 300 ml of water, it was dried to obtain 27.3 g of intermediate (T-1) (yield 93.7%).

Synthesis of Illustrative Compound A-1 27 g of intermediate (T-1) and 200 ml of methylene chloride were weighed into a 500 ml three-necked flask equipped with a mechanical stirrer, thermometer and condenser, and 21.2 g of pentoxide under ice cooling. Phosphorus was added slowly. After completion of the dropwise addition, the mixture was further heated and stirred for 2 hours, and then the solvent was distilled off under reduced pressure. The resulting reaction mixture (intermediate (T-2)) was used in the next step without purification.
Weighed 27.0 g of 1,3-dimethoxybenzene and 100 ml of nitrobenzene in a 500 ml three-necked flask equipped with another mechanical stirrer, thermometer and condenser, and the intermediate obtained in the previous reaction at room temperature. (T-2), 13.6 g of aluminum chloride was slowly added in turn, and the mixture was further heated and stirred at 60 ° C. for 2 hours. After confirming the progress of the reaction by TLC, the reaction solution was returned to room temperature, 13.6 g of aluminum chloride was further added, and the mixture was further heated and stirred at 80 ° C. for 2 hours. The resulting reaction mixture was poured into 300 ml of water with stirring and extracted with 500 ml of methylene chloride. The obtained organic layer was washed twice with 300 ml of saturated aqueous sodium hydrogen carbonate and 300 ml of saturated brine, dehydrated over anhydrous magnesium sulfate, and concentrated. The obtained crude product was recrystallized twice with acetonitrile to obtain 14.8 g of Exemplified Compound A-1 as a white solid (yield 40%).

(Synthesis Example 2) Synthesis of Exemplified Compound B-2 Exemplified Compound B-2 was synthesized according to the following scheme.

Synthesis of Intermediate (S-1) In a 2000 ml three-necked flask equipped with a mechanical stirrer, thermometer, and cooling tube, weigh 51 g of o-nitroaniline and 600 ml of 2N hydrochloric acid water. After slowly adding, the mixture was further stirred for 1 hour to form a diazonium salt. In a 2000 ml three-necked flask equipped with another mechanical stirrer, thermometer, condenser, and dropping funnel, weigh 40 g of m-aminophenol and 400 ml of 2N hydrochloric acid water, and cool the diazonium salt solution obtained in the previous reaction under ice cooling. Slowly added and further stirred at room temperature for 2 hours. After completion of the reaction, the reaction mixture was added to a mixed solution of 500 ml of water and 250 ml of methanol, and the precipitated solid was separated by filtration. The crude product of intermediate (S-1) thus obtained was further washed twice with 1000 ml of methanol and dried, and then used in the next step without further purification.

Synthesis of intermediate (S-2) Total amount of intermediate (S-1) obtained in the previous reaction was added to a 2000 ml three-necked flask equipped with a mechanical stirrer, thermometer, condenser, and dropping funnel. 1000 ml) was weighed and dissolved by stirring at room temperature. To this solution, 174 ml of acetic anhydride, 4.5 g of N, N-dimethylaminopyridine, and 259 ml of triethylamine were sequentially added, and then the reaction solution was heated to reflux for 6 hours. After confirming the progress of the reaction by TLC, about 700 ml of THF was distilled off under reduced pressure. This reaction mixture was slowly added to 1000 ml of ice water, and the precipitated intermediate (S-2) was separated by filtration and washed with water. The intermediate (S-2) thus obtained was used in the next step without further purification.

Synthesis of intermediate (S-3) Total amount of intermediate (S-2) obtained in the previous reaction in a 3000 ml three-necked flask equipped with a mechanical stirrer, thermometer and condenser, 850 ml of 4N aqueous sodium hydroxide solution, methanol 850 ml was weighed and the reaction solution was heated to 65 ° C. with stirring under a nitrogen stream. To this solution, 91 g of formamidinesulfinic acid was carefully added in 5 portions, and then the reaction solution was continuously stirred at 65 ° C. for 6 hours. After confirming the progress of the reaction by TLC, the reaction solution was cooled to room temperature, and this reaction mixture was slowly added to 2000 ml of ice water. The precipitated intermediate (S-3) was separated by filtration and washed with water to obtain an intermediate (S-3) (71 g) (yield 63% from m-aminophenol).

Synthesis of intermediate (S-4) 71 g of intermediate (S-3) obtained in the previous reaction, 125 ml of concentrated hydrochloric acid, and 500 ml of methanol were weighed into a 1000 ml three-necked flask equipped with a mechanical stirrer, thermometer and condenser. The reaction solution was heated with stirring, and stirring was continued at 60 ° C. for 3 hours. After confirming the progress of the reaction by TLC, the reaction solution was cooled to room temperature, and this reaction mixture was slowly added to 1000 ml of saturated sodium bicarbonate water with ice cooling and stirring. Extraction was performed with 500 ml of ethyl acetate, and the resulting organic layer was washed twice with 300 ml of saturated aqueous sodium bicarbonate and 300 ml of saturated brine, dehydrated over anhydrous magnesium sulfate, and concentrated. The obtained crude product was recrystallized from acetonitrile to obtain 33 g of white solid intermediate (S-4) (yield 64%).

Synthesis of Exemplary Compound (B-2) 12 g of intermediate (S-4) obtained in the previous reaction, 7.5 ml of triethylamine, and 200 ml of THF were weighed into a 500 ml three-necked flask equipped with a mechanical stirrer, thermometer, and condenser. The mixture was stirred under ice cooling. To this, 8.4 g of paratoluenesulfonyl chloride was separately added so that the internal temperature did not exceed 10 ° C. After the addition, the mixture was further stirred at room temperature for 1 hour and then heated and stirred at 60 ° C. for 6 hours. After confirming the progress of the reaction by TLC, the reaction solution was cooled to room temperature, carefully poured into 500 ml of 0.3N hydrochloric acid, and the resulting crystals were collected by filtration. The crude product was recrystallized from acetonitrile to obtain 14.5 g of a light yellowish white solid of exemplified compound (B-2) (yield 72%).

(Preparation example) Preparation of raw material solution The following raw materials were put into a mixing tank, stirred while heating, dissolved, and a solution having a cellulose acylate solution A composition was prepared.

<Composition of cellulose acylate solution A>
Cellulose acetate with a substitution degree of 2.86 100 parts by weight Methylene chloride (first solvent) 402 parts by weight Methanol (second solvent) 60 parts by weight

  The following raw materials were dissolved by stirring with heating in another mixing tank to prepare a solution having the additive solution B composition. Table 1 shows the optical anisotropy reducing compound and the wavelength dispersion adjusting agent used at this time.

<Additive solution B composition>
Additive 1 ·· Compound F-1 12 parts by mass Additive 2 ·· See Table 1 2 parts by mass Methylene chloride (first solvent) 49 parts by mass Methanol (second solvent) 7 parts by mass

<Additive solution C composition>
Additive 1 ·· Compound F-1 12 parts by mass Additive 2 ·· See Table 1 5 parts by mass Methylene chloride (first solvent) 47 parts by mass Methanol (second solvent) 6 parts by mass

<Additive solution D composition>
Additive 1 ·· Compound F-1 None Additive 2 ·· See Table 1 14 parts by weight Methylene chloride (first solvent) 49 parts by weight Methanol (second solvent) 7 parts by weight

<Preparation of Cellulose Acetate Film Sample 001>
562 parts by mass of the cellulose acylate solution A composition was cast on a drum cooled to 0 ° C. from the casting port. The film is peeled off at a solvent content of 70% by mass, and both ends in the width direction of the film are fixed with a pin tenter (a pin tenter described in FIG. 3 of JP-A-4-1009), and the solvent content is 3 to 5% by mass. In this state, the film was dried while maintaining an interval at which the stretching ratio in the transverse direction (direction perpendicular to the machine direction) was 3%. Then, it dried further by conveying between the rolls of the heat processing apparatus, and produced the 80-micrometer-thick cellulose film sample 001.

<Production of Cellulose Acetate Film Samples 002 to 011>
A dope was prepared by adding 70 parts by mass of the additive solution B composition to 562 parts by mass of the cellulose acylate solution A composition and stirring sufficiently.
This dope was cast from a casting port onto a drum cooled to 0 ° C. The film is peeled off at a solvent content of 70% by mass, and both ends in the width direction of the film are fixed with a pin tenter (a pin tenter described in FIG. 3 of JP-A-4-1009), and the solvent content is 3 to 5% by mass. Then, it was dried while maintaining an interval at which the stretching ratio in the transverse direction (direction perpendicular to the machine direction) was 3%. Then, it dried further by conveying between the rolls of a heat processing apparatus, and produced the 80-micrometer-thick cellulose acetate film samples 002-011.

<Production of Cellulose Acetate Film Samples 012 to 015>
70 parts by mass of the additive solution C composition was added to 562 parts by mass of the cellulose acylate solution A composition, and the dope was prepared by sufficiently stirring.
This dope was cast from a casting port onto a drum cooled to 0 ° C. The film is peeled off at a solvent content of 70% by mass, and both ends in the width direction of the film are fixed with a pin tenter (a pin tenter described in FIG. 3 of JP-A-4-1009), and the solvent content is 3 to 5% by mass. Then, it was dried while maintaining an interval at which the stretching ratio in the transverse direction (direction perpendicular to the machine direction) was 3%. Then, it dried further by conveying between the rolls of a heat processing apparatus, and produced the 80-micrometer-thick cellulose film samples 012-15.

<Production of Cellulose Acetate Film Samples 016 to 017>
60 parts by mass of the additive solution D composition was added to 562 parts by mass of the cellulose acylate solution A composition, and the dope was prepared by sufficiently stirring.
This dope was cast from a casting port onto a drum cooled to 0 ° C. The film is peeled off at a solvent content of 70% by mass, and both ends in the width direction of the film are fixed with a pin tenter (a pin tenter described in FIG. 3 of JP-A-4-1009), and the solvent content is 3 to 5% by mass. Then, it was dried while maintaining an interval at which the stretching ratio in the transverse direction (direction perpendicular to the machine direction) was 3%. Then, it dried further by conveying between the rolls of a heat processing apparatus, and produced the 80-micrometer-thick cellulose film samples 016-017.

The cellulose film sample was evaluated according to the following method. The results are shown in Table 1.
(1) Volatilization amount A film treated at 80 ° C. for 240 hours and an untreated film were each dissolved in a solvent, a compound was detected by liquid high-speed chromatography, and the peak area of the compound was determined as the amount of the compound remaining in the film as follows. Calculated by the formula.
Volatilization amount (%) = {(Amount of remaining compound in untreated product) − (Amount of remaining compound in treated product)} / (Amount of remaining compound in untreated product) × 100
(2) Bleed-out When the cellulosic film was produced, the film surface was visually observed, and “O” indicates that there is no bleed-out, and “X” indicates that the bleed-out is partially or totally. It should be noted that a partially or wholly bleed out Rth and ΔRth, which will be described later, was shown as being unmeasurable (3) Rth
Sample 30mm x 40mm is conditioned for 2 hours at 25 ° C and 60% RH, and Re is an automatic birefringence meter KOBRA
21ADH (manufactured by Oji Scientific Instruments Co., Ltd.) was measured by making light incident in the normal direction of the film. Re and 10 samples were measured with the in-plane slow axis as the tilt axis and the film normal direction as 0 °. Rth was calculated by inputting the assumed average refractive index value of 1.48 and the film thickness based on the retardation value measured by inclining light up to 50 ° at every angle and entering light.
(4) ΔRth
A sample 30 mm × 40 mm was conditioned at 25 ° C. and 60% RH for 2 hours, and light with a wavelength of 780 nm to 380 nm was incident in the normal direction of the film on an ellipsometer M-150 (manufactured by JASCO Corporation). Obtain Re at each wavelength, measure the wavelength dispersion of Re, and light with a wavelength of 780 to 380 nm from the direction inclined by + 40 ° with respect to the film normal direction with the slow axis in the plane as the tilt axis. The retardation value measured by making it incident and the retardation value measured by making light having a wavelength of 780 to 380 nm incident from a direction inclined by -40 ° with respect to the film normal direction with the in-plane slow axis as the tilt axis. Based on retardation values measured in a total of three directions, an assumed value of average refractive index of 1.48 and a film thickness were input to calculate Rth wavelength dispersion (ΔRth).

  From Table 1, it is clear that by containing the compound of the present invention, the optical anisotropy change (ΔRth) can be reduced while the optical anisotropy (Rth) of the film sample of the cellulose composition is kept small. Became. Further, it can be seen that a film that does not bleed out can be produced by reducing the heat volatilization amount, which is a problem in production.

Example 2
(Polarizing plate protective film)
The cellulose acylate film sample 001 obtained in Example 1 was immersed in an aqueous 1.5N sodium hydroxide solution at 55 ° C. for 2 minutes. It wash | cleaned in the room temperature water-washing bathtub, and neutralized using 0.1 N sulfuric acid at 30 degreeC. Again, it was washed in a water bath at room temperature and further dried with hot air at 100 ° C. In this way, the surface of the film was saponified.
Subsequently, a rolled polyvinyl alcohol film having a thickness of 80 μm was continuously stretched 5 times in an aqueous iodine solution and dried to obtain a polarizing film. Two cellulose acylate film samples 001 subjected to alkali saponification treatment were prepared using a 3% aqueous solution of polyvinyl alcohol (PVA-117H manufactured by Kuraray Co., Ltd.) as an adhesive, and bonded together with a polarizing film in between. A polarizing plate protected by sample 001 was obtained. At this time, the cellulose acylate film samples 001 on both sides were attached so that the slow axis was parallel to the transmission axis of the polarizing film. Further, a polarizing plate was prepared and evaluated in the same manner as described above except that the samples 002 to 011 obtained in Example 1 were used instead of the sample 001.
Compared with the cellulose composition of the comparative example, the optical properties of the elliptically polarizing plate using the polarizing plate protective film obtained from the cellulose composition of the present invention were superior. Further, the durability over time was not particularly problematic as compared with the comparative sample.

Example 3
(Liquid crystal display device)
Regarding the samples 001 to 011 of Example 1, the liquid crystal display device described in Example 1 of Japanese Patent Application Laid-Open No. 10-48420 and the optical disorder containing the discotic liquid crystal molecules described in Example 1 of Japanese Patent Application Laid-Open No. 9-26572 are disclosed. An anisotropic layer, an alignment film coated with polyvinyl alcohol, a VA liquid crystal display device described in FIGS. 2 to 9 of JP 2000-154261 A, and an OCB type described in FIGS. 10 to 15 of JP 2000-154261 A As a result of evaluation of the liquid crystal display device, better performance was obtained in any case when the cellulose body composition of the present invention was used as compared with the case where the cellulose body composition of the comparative example was used.

Example 4
Silver halide photographic light-sensitive material Samples 401 to 411 were prepared in the same manner as in Example 1 except that the thickness of the samples 001 to 011 in Example 1 was changed to 120 nm. One of the obtained films was provided with the first layer and the second layer described in Example 1 of JP-A-4-73736 to form a back layer having a cationic polymer as a conductive layer. Further, the sample 105 described in Example 1 of JP-A No. 11-38568 was applied to the opposite side of the obtained film base provided with the back layer to produce a silver halide photographic light-sensitive material. Compared to the case of using the cellulose composition of the comparative example, the silver halide photographic light-sensitive material obtained by using the cellulose composition of the present invention has an excellent image and has no problem in handling. there were.

Claims (12)

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

[Wherein, X ¹¹ , X ¹² , and X ¹³ are each independently a single bond, or —O—, —CO—, —NR ¹¹ — (R ¹¹ represents an aliphatic group or an aromatic group), and It represents a divalent linking group formed of one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent. Y ¹¹ , Y ¹² and Y ¹³ each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ¹¹ , Y ¹² and Y ¹³ is an ultraviolet absorbing residue. However, when Y ¹¹ , Y ¹² , or Y ¹³ is a UV-absorbing residue, X ¹¹ , X ¹² or X ¹³ linking the UV-absorbing residue is a single bond. ] The cellulose body composition according to claim 1, wherein the compound represented by the general formula (I) is a compound represented by the following general formula (II).

[Wherein, X ²¹ and X ²² are each independently a single bond, or —O—, —CO—, —NR ²² — (R ²² represents an aliphatic group or an aromatic group), and an aliphatic group or It represents a divalent linking group formed of one or more selected from the group consisting of linking groups formed from aromatic groups. The aliphatic group and the aromatic group may each independently have a substituent. Y ²¹ and Y ²² each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ²¹ and Y ²² is an ultraviolet absorbing residue. However, when Y ²¹ or Y ²² is an ultraviolet absorbing residue, X ²¹ or X ²² linking the ultraviolet absorbing residue is a single bond. ] At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (III) as a basic structure. The cellulose body composition according to claim 1 or 2, wherein

[Wherein, R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ , and R ³⁹ each independently represent a hydrogen atom or a substituent. However, at a position where R ³¹ , R ³² , R ³³ , R ³⁴ , R ³⁵ , R ³⁶ , R ³⁷ , R ³⁸ , or R ³⁹ at any position is removed, it is represented by the general formula (I) or (II). And a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ , or X ²² in the compound to be linked. ] At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (IV) as a basic structure. The cellulose body composition according to claim 1 or 2, wherein

[Wherein, R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , and R ⁴⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ , R ⁴⁶ , R ⁴⁷ , or R ⁴⁸ at any position is removed. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. ] At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (V) as a basic structure. The cellulose body composition according to claim 1 or 2, wherein

[Wherein, R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , and R ⁵⁸ each independently represent a hydrogen atom or a substituent. However, the compound represented by the general formula (I) or (II) at a position where R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ⁵⁵ , R ⁵⁶ , R ⁵⁷ , or R ⁵⁸ is removed at any position. It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ or X ²² therein. ] At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a compound represented by the following general formula (VI) as a basic structure. The cellulose body composition according to claim 1 or 2, wherein

[Wherein, R ⁶¹ , R ⁶² , R ⁶³ , R ⁶⁴ , and R ⁶⁵ each independently represent a hydrogen atom or a substituent. However, single bonds X ¹¹ and X ^{12 in the} compound represented by the general formula (I) or (II) at a position where R ⁶¹ , R ⁶² , R ⁶³ , R ⁶⁴ , or R ⁶⁵ at any position is removed. , X ¹³ , X ²¹ , or X ²² . ] At least one of the ultraviolet absorbing residues contained in the compound represented by the general formula (I) or (II) is an ultraviolet absorbing residue having a basic structure of the compound represented by the following general formula (VII) The cellulose body composition according to claim 1 or 2, wherein

[Wherein, R ⁷¹ , R ⁷² , R ⁷³ and R ⁷⁴ each independently represents a hydrogen atom or a substituent. Z ⁷¹ and Z ⁷² each independently represent a hydrogen atom, a substituent, or a group represented by the following general formula (VIII). However, the carbon atom at a position where R ⁷¹ , R ⁷² , R ⁷³ , R ⁷⁴ , Z ⁷¹ , Z ⁷² , R ⁷⁵ , R ⁷⁶ , R ⁷⁷ , R ⁷⁸ , or R ⁷⁹ is removed from any position is represented by the general formula It shall be connected by a single bond X ¹¹ , X ¹² , X ¹³ , X ²¹ , or X ²² in the compound represented by (I) or (II). ]

[Wherein, R ⁷⁶ , R ⁷⁷ , R ⁷⁸ and R ⁷⁹ each independently represent a hydrogen atom or a substituent, and R ⁷⁵ represents a hydrogen atom or an aliphatic group. Moreover, * represents the position couple | bonded with the ultraviolet absorptive residue represented by general formula (VII). ]   The said cellulose body is a cellulose acylate, The cellulose body film which consists of a cellulose body composition of any one of Claims 1-7 characterized by the above-mentioned.   A polarizing plate protective film comprising at least one layer of the cellulose-based film according to claim 8.   A liquid crystal display device comprising at least one layer of the cellulose-based film according to claim 8.   A silver halide photographic light-sensitive material, wherein the cellulose film according to claim 8 is used as a support. The modifier for cellulose body films which consists of a compound represented by the following general formula (I) or (II).

[Wherein, X ¹¹ , X ¹² , and X ¹³ are each independently a single bond, or —O—, —CO—, —NR ¹¹ — (R ¹¹ represents an aliphatic group or an aromatic group), and It represents a divalent linking group formed of one or more selected from the group consisting of a linking group formed from an aliphatic group or an aromatic group. The aliphatic group and the aromatic group may each independently have a substituent. Y ¹¹ , Y ¹² and Y ¹³ each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ¹¹ , Y ¹² and Y ¹³ is an ultraviolet absorbing residue. However, when Y ¹¹ , Y ¹² , or Y ¹³ is an ultraviolet absorbing residue, X ¹¹ , X ¹² , or X ¹³ linking the ultraviolet absorbing residue is a single bond. ]

[Wherein, X ²¹ and X ²² are each independently a single bond, or —O—, —CO—, —NR ²² — (R ²² represents an aliphatic group or an aromatic group), and an aliphatic group or It represents a divalent linking group formed of one or more selected from the group consisting of linking groups formed from aromatic groups. The aliphatic group and the aromatic group may each independently have a substituent. Y ²¹ and Y ²² each independently represent a hydrogen atom or an ultraviolet absorbing residue, and at least one of Y ²¹ and Y ²² is an ultraviolet absorbing residue. However, when Y ²¹ or Y ²² is an ultraviolet absorbing residue, X ²¹ or X ²² linked to the ultraviolet absorbing residue is a single bond. ]