Negative birefringence compensation films based on regioselectively substituted cellulose esters with improved wavelength dispersion

Abstract

The present application relates to a method for producing a regioselectively substituted cellulose ester and a compound represented by the formula (I), the formula (II) (wherein: rings A, B, C, R 1 , R 2 , R 5 , R 6 , R 8 , R 9 , m, n and k are defined herein. The film exhibits negative birefringence and improved wavelength dispersion. JPEG2024532775000033.jpg97100

Description

[Background technology]

[0001] Cellulose ester ("CE")-based films with negative birefringence are preferred for displays. However, negative birefringent CE films typically display normal wavelength dispersion, resulting in color shifts. To eliminate this problem, the films need to be tailored to exhibit improved wavelength dispersion, such as flat or reverse wavelength dispersion. However, little is known about how to achieve flat or reverse wavelength dispersion in negative birefringent CE films. Applicants have disclosed stretched films containing regioselectively substituted cellulose esters ("RCE") and certain small molecule components with improved wavelength dispersion. Some films have Z properties. Summary of the Invention [Means for solving the problem]

[0002] This application is (1) (i) a plurality of aromatic -CO- substituents, (ii) a plurality of first unsaturated or saturated (C 1~6 ) alkyl-CO- substituents, and (iii) multiple hydroxyl substituents A regioselectively substituted cellulose ester comprising: where: Degree of hydroxyl substitution (DS OH ") is 0.2 to 1.1, The cellulose ester has a C2 degree of substitution ("C2DS") of aromatic -CO- substituents of 0.15 to 0.8. ArCO ") The cellulose ester has a C3 degree of substitution ("C3DS") of aromatic -CO- substituents of 0.05 to 0.6. ArCO ") The cellulose ester has a C6 degree of substitution ("C6DS") of aromatic -CO- substituents of 0.05 to 0.6. ArCO ") Total degree of substitution of aromatic -CO-substituents ("Total DS ArCO") is 0.25 to 2.0, Aromatic -CO- is (I C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1 or (ii) Heteroaryl-CO-, wherein heteroaryl is a 5-10 membered ring having 1-4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or has 1-5 R 1 has been replaced by and a regioselectively substituted cellulose ester, (2)

[0003] [ka]

[0004] [In formula: Ring A is (C 6~20 ) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring B is (C 6~20 ) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring C is (C 6~20 ) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Each R 1 are independently saturated or unsaturated (C 1~20 ) alkyl; saturated or unsaturated halo(C 1~20 ) alkyl; saturated or unsaturated (C 1~20 )alkoxy;saturated or unsaturated halo(C 1~20 ) alkoxy; unsubstituted or substituted with 1 to 5 alkyl, haloalkyl, alkoxy, haloalkoxy, halo (C 6~20 ) aryl; 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; or -CH2 C(O)-R 3 and; R 2 are independently hydrogen, saturated or unsaturated (C 1~20 ) alkyl, or saturated or unsaturated halo(C 1~20 ) alkyl; Each R 3 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, (C 6~20 ) aryl, or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, where the aryl or heteroaryl is unsubstituted or is selected from 1-5 R 6 Replaced by; Each R 4 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~20 ) aryl, or containing 1 to 4 heteroatoms selected from N, O, or S, unsubstituted or containing 1 to 5 R 6 wherein each group is unsubstituted or substituted with 1 to 3 hydroxyl, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C6~20 ) aryl, or an unsubstituted or substituted 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; Each R 6 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, halo, (C 6~20 ) aryl, 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, saturated or unsaturated hydroxy (C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, where each group is unsubstituted or contains 1 to 5 R 7 has been replaced by; Each R 7are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) alkyl, saturated or unsaturated hydroxy (C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20)Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkoxy; Each R 9 are independently 4 -O-, hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-O-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20)Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~10 ) aryl, unsubstituted or containing 1 to 4 heteroatoms selected from N, O, or S; 6 and wherein each group is unsubstituted or substituted with 1 to 3 hydroxy, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, or saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20) substituted by aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, which are unsubstituted or substituted; each n is independently 0, 1, 2, 3, 4, or 5; each m is independently 0, 1, 2, 3, 4, or 5; k is independently 0, 1, 2, 3 or 4. Component A, A film comprising: where: Component A is present in an amount of less than 30 wt %, based on the total weight of the film; The film has a R of -100nm to -350nm. e (589 nm), The film has an R of -100nm to 100nm. th (589 nm), The film has an R of 0.7 to 1.20. e (450nm) / R e (550 nm), The film has an R of 0.9 to 1.25. e (650nm) / R e (550 nm), The film has a [[-R th (589nm) / R e (589 nm)]+0.5]("N z ") and Each R th (589 nm) is the out-of-plane retardation measured at 589 nm, Each R e (589 nm), R e (450 nm), R e (550 nm) are the in-plane retardations measured at 589 nm, 450 nm, and 550 nm, respectively; The film is stretched, The film is disclosed.

[0005] This application refers to the following drawings: [Brief description of the drawings]

[0006] [Figure 1] A schematic diagram of a retardation film stretched in one direction (x-direction) is provided. [Diagram 2] 1 provides illustrations of chromatic dispersion modes in compensation films: (a) normal chromatic dispersion, (b) flat chromatic dispersion, and (c) reverse chromatic dispersion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The present invention can be more easily understood by referring to the following detailed description of the invention and the examples described therein. It should be understood that the present invention is not limited to the specific methods, compositions, and conditions described, which can be modified. It should also be understood that the terms used herein are only intended to describe specific embodiments of the present invention, and are not intended to be limiting.

[0008] definition In this specification and in the claims that follow, reference will be made to a number of terms that shall be defined to have the following meanings.

[0009] Values ​​can be expressed as "about" or "approximately" a given number. Similarly, ranges can be expressed herein as from "about" one particular value and / or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by using the prefix "about," it will be understood that the particular value forms another embodiment.

[0010] As used herein, the terms "a," "an," and "the" mean one or more. As used herein, the term "and / or," when used in a list of two or more items, means that any one of the listed items can be used by itself, or any combination of two or more of the listed items can be used. For example, if a composition is described as containing components A, B, and / or C, the composition can contain A alone, B alone, C alone, a combination of A and B, a combination of A and C, a combination of B and C, or a combination of A, B, and C.

[0011] As used herein, the terms "comprising," "comprises," and "comprise" are open-ended transitional phrases used to transition from a subject listed before the term to one or more elements listed after the term, and the one or more elements listed after the transitional phrase are not necessarily the only elements that make up the subject.

[0012] As used herein, the terms "having," "has," and "have" have the same open-ended meaning as "comprising," "comprises," and "comprise" above.

[0013] As used herein, the terms "including," "includes," and "include" have the same open-ended meaning as "comprising," "comprises," and "comprise" above.

[0014] Regioselectively substituted cellulose esters suitable for use in the manufacture of optical films can include multiple alkyl-acyl or alkyl-CO-substituents, multiple aryl-acyl or aryl-CO-substituents, heteroaryl-acyl or heteroaryl-CO-substituents. As used herein, the term "acyl substituent" or "R-CO-" refers to a group having the structure:

[0015] [ka]

[0016] The substituent having the formula: Such acyl or R-CO- groups in cellulose esters are generally attached to the pyranose ring of cellulose via an ester bond (ie, through an oxygen atom).

[0017] Aromatic-CO- is an acyl substituent having an aromatic ring system. Examples include aryl-CO- or heteroaryl-CO-. Specific examples include benzoyl, naphthoyl, and furoyl, each of which is unsubstituted or substituted.

[0018] As used herein, the term "aryl-acyl" substituent is intended to refer to an acyl substituent in which "R" is an aryl group. As used herein, the term "aryl" is intended to refer to a monovalent group formed by removing a hydrogen atom from a ring carbon in an arene (i.e., a monocyclic or polycyclic aromatic hydrocarbon). In some cases, the aryl-acyl group is preceded by a carbon unit (e.g., (C 5~6 ) aryl-acyl, (C 6~12 ) aryl-acyl, or (C 6~20 ) aryl-acyl). Examples of aryl groups suitable for use in the various embodiments include, but are not limited to, phenyl, benzyl, tolyl, xylyl, and naphthyl. Such aryl groups may be substituted or unsubstituted.

[0019] As used herein, the term "alkyl-acyl" is intended to refer to an acyl substituent where "R" is an alkyl group. As used herein, the term "alkyl" is intended to refer to a monovalent group formed by removing a hydrogen atom from a non-aromatic hydrocarbon, and may include heteroatoms. Alkyl groups suitable for use herein may be linear, branched, or cyclic, and may be saturated or unsaturated. Suitable alkyl groups for use herein include those described below, including those described below. 1~20 ), (C 1~12 ), (C 1~5 ), or (C 1~3 ) alkyl groups. In various embodiments, alkyl is any of the C 1~5 In yet another embodiment, the alkyl group is 1~3 It may be a straight chain alkyl group. Examples of suitable alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, hexyl, octyl, decyl, dodecyl, cyclopentyl, and cyclohexyl groups. Examples of alkyl-acyl groups include acetyl, propionyl, butyryl, etc.

[0020] "Haloalkyl" refers to an alkyl substituent in which at least one hydrogen is replaced with a halogen group. The carbon units in the haloalkyl group are often included (e.g., halo(C 1~6 ) alkyl). Haloalkyl groups can be straight or branched. Non-limiting examples of haloalkyl include chloromethyl, trifluoromethyl, dibromoethyl, and the like.

[0021] "Heteroalkyl" means an alkyl in which one or more carbon atoms are replaced with a heteroatom, such as N, O or S. "Heteroaryl" refers to an aryl in which at least one carbon unit in the aryl ring is replaced with a heteroatom such as O, N, and S. Heteroaryl is a ring that may be monocyclic or polycyclic. Often, units that make up a heteroaryl ring system are included, for example, 5-20 membered ring systems. A 5-membered heteroaryl refers to a ring system having 5 atoms that form the heteroaryl ring. Non-limiting examples of heteroaryl include pyridinyl, quinolinyl, pyrimidinyl, thiophenyl, and the like.

[0022] "Alkoxy" refers to an alkyl-O- or alkyl group terminally attached to an oxygen group. Often includes carbon units (e.g., (C 1~6 )alkoxy). Non-limiting examples of alkoxy include methoxy, ethoxy, propoxy, and the like.

[0023] "Haloalkoxy" refers to an alkoxy in which at least one of the hydrogens is replaced with a halogen. In many cases, a carbon unit is included (e.g., halo(C 1~6 )alkoxy). Non-limiting examples of haloalkoxy include trifluoromethoxy, bromomethoxy, 1-bromo-ethoxy, and the like.

[0024] "Halo" means halogen such as fluoro, chloro, bromo, or iodo. "Degree of substitution" is used to describe the substitution level of the substituents per anhydroglucose unit ("AGU"). Generally, conventional cellulose contains three hydroxyl groups in each AGU that can be substituted. Thus, DS can have a value between 0 and 3. However, low molecular weight cellulose mixed esters can have a total degree of substitution slightly higher than 3 from end group contributions. Low molecular weight cellulose mixed esters are described in more detail later in this disclosure. Since DS is a statistical average, a value of 1 does not guarantee that all AGUs have a single substituent. In some cases, some unsubstituted anhydroglucose units may have two and some three substituents, and in most cases the value is not an integer. Total DS is defined as the average number of all substituents per anhydroglucose unit. The degree of substitution per AGU can also refer to a specific substituent, such as, for example, hydroxyl, acetyl, butyryl, or propionyl. In addition, the degree of substitution can specify any of the carbon units of the anhydroglucose unit.

[0025] When the degree of substitution refers to hydroxyl, i.e., DS OH refers to the average hydroxyl group per unsubstituted anhydroglucose. As a result, DS OH is not used in calculating the total degree of substitution.

[0026] Number range This specification uses numerical ranges to quantify certain parameters related to the present invention. It should be understood that when a numerical range is described, the range should be interpreted as providing literal support for the claim limitations that recite only the lower value of the range as well as the claim limitations that recite only the upper value of the range. For example, a disclosed numerical range of 10 to 100 provides literal support for claims that recite "greater than 10" (no upper bound) and claims that recite "less than 100" (no lower bound).

[0027] Although this specification uses specific numerical values ​​to quantify certain parameters related to the present invention, the specific numerical values ​​are not specifically part of numerical ranges. It should be understood that each specific numerical value described herein is interpreted as providing literal support for a broad, medium, and narrow range. The broad range associated with each specific numerical value is the numerical value plus / minus 60 percent of the numerical value rounded to two significant digits. The medium range associated with each specific numerical value is the numerical value plus / minus 30 percent of the numerical value rounded to two significant digits. The narrow range associated with each specific numerical value is the numerical value plus / minus 15 percent of the numerical value rounded to two significant digits. For example, if the specification describes a specific temperature of 62°F, the description provides literal support for a wide numerical range of 25°F to 99°F (62°F + / - 37°F), a medium numerical range of 43°F to 81°F (62°F + / - 19°F), and a narrow numerical range of 53°F to 71°F (62°F + / - 9°F). These wide, medium, and narrow numerical ranges should not only apply to the specific values, but also to the differences between these specific values. Thus, if the specification describes a first pressure of 110 psia and a second pressure of 48 psia (a difference of 62 psi), the wide, medium, and narrow ranges of the pressure difference between these two streams would be 25 to 99 psi, 43 to 81 psi, and 53 to 71 psi, respectively.

[0028] Throughout this application, where patent documents and publications are referenced, the entire disclosures of these references are intended to be incorporated by reference into this application to the extent not inconsistent with the present invention in order to more fully describe the state of the art to which this invention pertains.

[0029] Compensation films are important for improving the image quality of liquid crystal displays (LCD) and organic light-emitting diode displays (OLED). For an isotropic material, the refractive index is the same regardless of the polarization state of the incident light. As materials become directional and anisotropic, the refractive index becomes directionally dependent. The difference between the refractive indices along different directions is the birefringence. For polymeric films, stretching around or beyond the glass transition temperature is usually required to make the polymer directional and result in birefringence. The birefringence of compensation films is important for image quality. It is often used to characterize compensation films by measuring the in-plane birefringence (Δn e ) and out-of-plane birefringence (Δn th For a film stretched along the x direction, Δn e and Δn th is defined by the following formula:

[0030] Δn e =(n x -n y ) Δn th =[n z -(n x +n y ) / 2] In the formula, n x is the refractive index along the stretching direction in the film plane, while n y is the refractive index perpendicular to the stretching direction in the film plane, and n z is the refractive index perpendicular to the film plane. For most polymeric materials, when a film is stretched along the x-direction, the refractive index in the film plane along the stretching direction (n x ) is the refractive index perpendicular to the stretching direction (n y ), i.e., Δn e =(n x -n y ) is greater than zero, and the stretch direction is the slow axis. Such polymeric materials have inherent positive birefringence. Some polymeric materials have inherent negative birefringence. When such materials are stretched along one direction (x direction), the refractive index (n x) is the refractive index perpendicular to the stretching direction (n y ), i.e., Δn e =(n x -n y ) is less than zero, and the stretch direction in the plane of the film is the fast axis.

[0031] Accordingly, the in-plane retardation (R e ) and out-of-plane retardation (R th ) is Δn e and the thickness (d) of the compensation film and Δn th It is defined as the product of and d. R e =(n x -n y ) * d R th =[n z -(n x +n y ) / 2] * d Here, in the case of a polymer film having positive birefringence, n x is the refractive index along the slow axis in the film plane, and n y is the refractive index along the fast axis in the film plane, and n z is the refractive index perpendicular to the film plane; for a film with negative birefringence, n x is the refractive index along the fast axis in the film plane, and n y is the refractive index along the slow axis in the film plane, and n z is the refractive index perpendicular to the film plane.

[0032] In addition, the Nz factor is also widely used and is defined by the following formula: N z =(n x -n z ) / (n x -n y )=-R th / R e +0.5 Here, in the case of a polymer film having positive birefringence, n x is the refractive index along the slow axis in the film plane, and n yis the refractive index along the fast axis in the film plane, and n z is the refractive index perpendicular to the film plane; for a film with negative birefringence, n x is the refractive index along the fast axis in the film plane, and n y is the refractive index along the slow axis in the film plane, and n z is the refractive index perpendicular to the film plane.

[0033] Depending on the application, all three refractive indices are different (n x ≠ n y , n x ≠ n z and n y ≠ n z ) biaxial films, or films in which two indices of refraction are very close but different from the third (n x =n y ≠ n z , n x =n z ≠ n y , n y =n z ≠ n x Various compensation films have been developed, such as uniaxial films. For uniaxial films, there are A+ films, A- films, C+ films and C- films, which are defined by the following formula: A+:n x >n y =n z ;N z Coefficient = 1 A-:n x <n y =n z ;N z Coefficient = 1 C+:n x =n y <n z ;N z Coefficient = ∞ C-:n x =n y >n z ;N z Coefficient = ∞ For biaxial films, one important category of biaxial films is n x >n z >n y or ny >n z >n x Z film; most specifically, N z n yields coefficient = 0.5 z =(n x +n y Of particular interest are biaxial films with θ = 0.05 μm / s.

[0034] In addition, wavelength dispersion is also important for compensation films. Wavelength dispersion is related to birefringence or retardation with the wavelength of light. R e (450nm) / R e (550 nm), R e (650nm) / R e (550 nm), R th (450nm) / R th (550 nm) and R th (650nm) / R th (550nm) indicates the ratio of retardation at 450nm, 550nm and 650nm and is widely used to characterize chromatic dispersion. As shown in Figure 2, normal chromatic dispersion means that the birefringence or retardation of the compensation film is larger at short wavelengths with Re(450nm) / Re(550nm)>1, Re(650nm) / Re(550nm)<1, flat chromatic dispersion means that the birefringence or retardation of the compensation film is constant over the tested wavelength range with Re(450nm) / Re(550nm)=1, Re(650nm) / Re(550nm)=1, and inverse chromatic dispersion means that the birefringence or retardation of the compensation film is smaller at short wavelengths with Re(450nm) / Re(550nm)<1, Re(650nm) / Re(550nm)>1. Reverse wavelength dispersion is highly desirable as it can significantly reduce color shift in displays.

[0035] Cellulose esters have been widely used in compensation films. They have many advantages over other materials such as polycarbonates and poly(cyclic olefins). Most cellulose ester-based compensation films are made from cellulose esters with aliphatic acyl substituents, such as cellulose acetate, cellulose acetate propionate, and cellulose acetate butyrate. The acyl substituents are randomly distributed. Also, the birefringence of such compensation films is usually n x >n y is positive, where n x is the refractive index along the stretching direction in the film plane, while n y is the refractive index perpendicular to the stretching direction in the film plane. Negative birefringence (n x <n y Cellulose esters with negative birefringence can be achieved by adding aromatic acyl substituents and controlling the position of the aromatic acyl substituents or the long chain aliphatic acyl substituents. One problem with compensation films made from cellulose esters with negative birefringence is the lack of R e (450nm) / R e (550nm)>1 and R e (650nm) / R e The normal wavelength dispersion of the compensation film is (550 nm) < 1. There is no commercially available product based on cellulose ester with negative birefringence and flat or reverse wavelength dispersion. More specifically, there is no commercially available product for Z film based on cellulose ester with negative birefringence and flat or reverse wavelength dispersion.

[0036] In various embodiments, regioselectively substituted cellulose esters can be used, in which aryl-acyl substituents are preferentially incorporated at C2 and C3 of the pyranose ring. Regioselectivity can be measured by determining the relative degree of substitution ("RDS") at C6, C3 and C2 in the cellulose ester by carbon-13 NMR spectroscopy (Macromolecules, 1991, 24, 3050-3059). In the case of one type of acyl substituent or when only a small amount of the second acyl substituent is present (DS<0.2), the RDS can be most easily determined directly by integration of ring carbons. When two or more acyl substituents are present in similar amounts, in addition to determining the ring RDS, it is sometimes necessary to completely substitute the cellulose ester with additional substituents to independently determine the RDS of each substituent by integration of carbonyl carbons. In conventional cellulose esters, regioselectivity is generally not observed, and the RDS ratios of C6 / C3, C6 / C2, or C3 / C2 are generally close to or below 1. In essence, conventional cellulose esters are random copolymers. In contrast, when one or more acylation reagents are added to cellulose dissolved in a suitable solvent, the C6 position of cellulose is acylated much faster than the C2 and C3 positions. As a result, the C6 / C3 and C6 / C2 ratios are predominantly greater than 1, which is characteristic of 6,3- or 6,2-reinforced regioselectively substituted cellulose esters.

[0037] Examples of regioselectively substituted cellulose esters and their preparation methods are described in US2010 / 0029927, US2010 / 0267942, and US8,354,525, the contents of which are incorporated herein by reference. In general, these applications relate to the preparation of cellulose esters by dissolving cellulose in an ionic liquid and then contacting it with an acylating reagent. Accordingly, for various embodiments of the present invention, two general methods can be used to prepare regioselectively substituted cellulose esters. In one method, regioselectively substituted cellulose esters can be prepared using stepwise addition by first contacting a cellulose solution with one or more alkyl acylating reagents, followed by contacting the cellulose solution with an aryl acylating reagent at a contact temperature and contact time sufficient to produce a cellulose ester with a desired degree of substitution ("DS") and degree of polymerization ("DP"). In this stepwise addition, acyl groups containing alkyl groups may be preferentially incorporated at C6, and acyl groups containing aryl groups may be preferentially incorporated at C2 and / or C3. Alternatively, regioselectively substituted cellulose esters can be prepared by contacting a cellulose solution with one or more alkyl acylating reagents, followed by isolating the alkyl esters in which the acyl groups containing alkyl groups are preferentially incorporated at C6. The alkyl esters can then be dissolved in a suitable organic solvent and contacted with an aryl-acylating reagent that can preferentially incorporate the acyl groups containing aryl groups at C2 and / or C3 at a contact temperature and contact time sufficient to produce a cellulose ester with the desired degree of substitution ("DS") and degree of polymerization ("DP").

[0038] Examples of regioselectively substituted cellulose esters and methods for their preparation are also described in US20170306054 and US20170307796, the contents of which are incorporated herein by reference. In general, these applications relate to the preparation of cellulose esters by dissolving a starting cellulose ester having a low degree of substitution (DS) in a suitable organic solvent, which is then contacted with an acylating reagent. Accordingly, for various embodiments of the present invention, two general methods can be used to prepare regioselectively substituted cellulose esters. In one method, regioselectively substituted cellulose esters can be prepared using stepwise addition by first contacting the starting cellulose ester solution with one or more alkyl acylating reagents, followed by contacting the cellulose solution with an aryl acylating reagent at a contact temperature and contact time sufficient to produce a cellulose ester having a desired degree of substitution ("DS") and degree of polymerization ("DP"). In this stepwise addition, acyl groups containing alkyl groups may be preferentially incorporated at C6, and acyl groups containing aryl groups may be preferentially incorporated at C2 and / or C3. Alternatively, regioselectively substituted cellulose esters can be prepared by contacting the starting cellulose ester solution with one or more alkyl acylating reagents, followed by isolating the alkyl esters in which the acyl groups containing alkyl groups are preferentially incorporated at C6. The alkyl esters can then be dissolved in any suitable organic solvent and contacted with an aryl-acylating reagent that can preferentially incorporate the acyl groups containing aryl groups at C2 and / or C3 at a contact temperature and contact time sufficient to produce a cellulose ester with the desired degree of substitution ("DS") and degree of polymerization ("DP").

[0039] The cellulose esters so prepared generally contain the following structure:

[0040] [ka]

[0041] In the formula, R 2 , R 3 , and R 6 is hydrogen (where R 2 , R 3 , and R 6 is not simultaneously hydrogen), alkyl-acyl groups, and / or aryl-acyl groups (such as those described above), which are attached to cellulose via ester bonds.

[0042] The degree of polymerization ("DP") of the cellulose esters prepared by these methods may be at least 10. In other embodiments, the DP of the cellulose esters may be at least 50, at least 100, or at least 250. In other embodiments, the DP of the cellulose esters may range from about 5 to about 100, or from about 10 to about 50.

[0043] Suitable acylating reagents for use herein can include, but are not limited to, alkyl or aryl carboxylic anhydrides, carboxylic acid halides, and / or carboxylic acid esters that contain the above alkyl or aryl groups suitable for use in the acyl substituent of the regioselectively substituted cellulose esters described herein.Suitable examples of carboxylic acid anhydrides include, but are not limited to, acetic anhydride, propionic anhydride, butyric anhydride, pivaloyl anhydride, benzoic anhydride, and naphthoyl anhydride.Suitable examples of carboxylic acid halides include, but are not limited to, acetyl chloride or bromide, propionyl, butyryl, pivaloyl, benzoyl, and naphthoyl.Suitable examples of carboxylic acid esters include, but are not limited to, acetyl, propionyl, butyryl, pivaloyl, benzoyl, and naphthoyl methyl esters. In one or more embodiments, the acylating reagent may be one or more carboxylic acid anhydrides selected from the group consisting of acetic anhydride, propionic anhydride, butyric anhydride, pivaloyl anhydride, benzoyl anhydride, and naphthoyl anhydride.

[0044] Stretched Film The present application provides a method for the preparation of a compound comprising: (1) (i) a plurality of aromatic -CO- substituents; (ii) a plurality of first unsaturated or saturated (C 1~6 ) alkyl-CO-substituents, and (iii) multiple hydroxyl substituents, wherein the degree of substitution of the hydroxyl ("DS OH ") is 0.2 to 1.1, and the cellulose ester has a C2 degree of substitution ("C2DS ArCO "), and the cellulose ester has a C3 degree of substitution of aromatic -CO- substituents ("C3DS ArCO "), and the cellulose ester has a C6 degree of substitution of aromatic -CO- substituents of 0.05 to 0.6 ("C6DS ArCO "), and the total degree of substitution of aromatic -CO- substituents ("Total DS ArCO ") is 0.25 to 2.0, and aromatic -CO- is (i) (C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1 or (ii) heteroaryl-CO-, wherein heteroaryl is a 5-10 membered ring having 1-4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or substituted with 1-5 R 1 and (2) a regioselectively substituted cellulose ester,

[0045] [ka]

[0046] [Wherein: Ring A is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring B is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring C is (C 6~20) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R 1 are independently saturated or unsaturated (C 1~20 ) alkyl; saturated or unsaturated halo(C 1~20 ) alkyl; saturated or unsaturated (C 1~20 )alkoxy;saturated or unsaturated halo(C 1~20 ) alkoxy; unsubstituted or substituted with 1 to 5 alkyl, haloalkyl, alkoxy, haloalkoxy, halo (C 6~20 ) aryl; 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; or -CH 2 C(O)-R 3 ;R 2 are independently hydrogen, saturated or unsaturated (C 1~20 ) alkyl, or saturated or unsaturated halo(C 1~20 ) alkyl; each R 3 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, (C 6~20 ) aryl, or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, where the aryl or heteroaryl is unsubstituted or is selected from 1-5 R 6 Each R 4 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~20 ) aryl, or containing 1 to 4 heteroatoms selected from N, O, or S, unsubstituted or containing 1 to 5 R 6 wherein each group is unsubstituted or substituted with 1 to 3 hydroxyl, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or an unsubstituted or substituted 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R 6 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, halo, (C 6~20 ) aryl, 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, saturated or unsaturated hydroxy (C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, where each group is unsubstituted or contains 1 to 5 R 7 has been replaced by; Each R 7 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) alkyl, saturated or unsaturated hydroxy (C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-CO, saturated or unsaturated (C1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkoxy; each R 9 are independently 4 -O-, hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-O-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~10 ) aryl, unsubstituted or containing 1 to 4 heteroatoms selected from N, O, or S; 6 and wherein each group is unsubstituted or substituted with 1 to 3 hydroxy, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, or saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, which are unsubstituted or substituted; each n is independently 0, 1, 2, 3, 4, or 5; each m is independently 0, 1, 2, 3, 4, or 5; k is independently 0, 1, 2, 3, or 4; and e (589 nm), and the film has a R of -100 nm to 100 nm. th (589 nm), and the film has an R e (450nm) / R e (550 nm), the film has an R of 0.9 to 1.25 e (650nm) / R e (550 nm), the film has a [[-R th (589nm) / R e (589 nm)]+0.5]("N z ") and each R th (589 nm) is the out-of-plane retardation measured at 589 nm, and each R e (589 nm), R e (450 nm), R e (550 nm) are the in-plane retardations measured at 589 nm, 450 nm, and 550 nm, respectively, and the film is stretched.

[0047] In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 100°C to 220°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 100°C to 150°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 100°C to 175°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 150°C to 200°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 125°C to 200°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 175°C to 200°C. In one embodiment, or in combination with any other embodiment, the film is stretched at a temperature of 125°C to 175°C. In one embodiment, the film is stretched at a temperature of T g -30℃~T g +50° C., where T g is the glass transition temperature of the film.

[0048] In one embodiment, or in combination with any other embodiment, R 9 is R 4 In one embodiment, or in combination with any other embodiment, R 9 is saturated or unsaturated (C 1~20 ) alkyl, (C 1~20 )Alkyl-O-(C 1~20 ) alkyl-, where the alkyl group is saturated or unsaturated, or saturated or unsaturated (C 1~20 )Alkyl-O-(C 1~20 ) alkyl-O-.

[0049] In one embodiment, or in combination with any other embodiment, R 9 is hydroxy, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-O-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 )Alkyl-(C 6~10 ) aryl, 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, where each group is unsubstituted or has 1-3 hydroxyl, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxyl, or saturated or unsaturated halo(C 1~20 ) alkoxyl, saturated or unsaturated hydroxyl (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) substituted by alkyl.

[0050] In one embodiment, or in combination with any other embodiment, the film has an R e In one embodiment, or in combination with any other embodiment, the film has an R of -120 nm to -320 nm. e In one embodiment, or in combination with any other embodiment, the film has an R of -120 nm to -175 nm. e In one embodiment, or in combination with any other embodiment, the film has an R of -175 nm to -350 nm. e In one embodiment, or in combination with any other embodiment, the film has an R of -208 nm to -262 nm. e (589 nm).

[0051] In one embodiment, or in combination with any other embodiment, the film has an R th In one embodiment, or in combination with any other embodiment, the film has an R thIn one embodiment, or in combination with any other embodiment, the film has an R th (589 nm).

[0052] In one embodiment, or in combination with any other embodiment, R e (589nm) is -120nm to -320nm, R th (589nm) is -60nm to 60nm.

[0053] In one embodiment, or in combination with any other embodiment, R e (450nm) / R e (550 nm) is 0.75 to 1.05. e (450nm) / R e (550nm) ratio is 0.75~0.85.

[0054] In one embodiment, or in combination with any other embodiment, R e (589nm) is -120nm to -320nm, R th (589nm) is -60nm to 60nm, R e (450nm) / R e (550 nm) ratio is 0.95 to 1.02, and R e (650nm) / R e (550 nm) is 0.95 to 1.05, where R e (450 nm), R e (550 nm) and R e (650 nm) are the in-plane retardations measured at 450 nm, 550 nm and 650 nm, respectively.

[0055] In one class of this embodiment, Re(589 nm) is between -240 nm and -320 nm, and Rth(589 nm) is between -60 nm and 60 nm.In one class of this embodiment, Re(589 nm) is between -120 nm and -160 nm, and Rth(589 nm) is between -30 nm and 30 nm.

[0056] In one embodiment, or in combination with any other embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.75 to 0.95, and R e (650nm) / R e (550 nm) ratio is 0.97 to 1.15.

[0057] In one class of this embodiment, Re(589 nm) is between -120 nm and -160 nm, and Rth(589 nm) is between -30 nm and 30 nm. In one class of this embodiment, Re(589 nm) is between -240 nm and -320 nm, and R th (589nm) is -30nm to 30nm.

[0058] In one embodiment, or in combination with any other embodiment, N z is -2.0 to 2.0. In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.95 to 1.02, and the ratio of Re(650 nm) / Re(550 nm) is 0.95 to 1.05, where Re(450 nm), Re(550 nm), and Re(650 nm) are the in-plane retardations measured at 450 nm, 550 nm, and 650 nm, respectively.

[0059] In a subclass of this class, Re(589 nm) is −240 nm to −320 nm, and Rth(589 nm) is −60 nm to 60 nm. In a subclass of this class, Re(589 nm) is −120 nm to −160 nm, and Rth(589 nm) is −30 nm to 30 nm.

[0060] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is −60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.75 to 0.95, and the ratio of Re(650 nm) / Re(550 nm) is 0.97 to 1.15.

[0061] In a subclass of this class, Re(589 nm) is -120 nm to -160 nm, and Rth(589 nm) is -30 nm to 30 nm. In a subclass of this class, Re(589 nm) is -240 nm to -320 nm, and R th (589nm) is -30nm to 30nm.

[0062] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0063] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0064] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0065] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0066] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0067] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0068] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0069] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0070] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0071] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0072] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0073] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e(650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0074] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0075] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is 0.15 to 4.2.

[0076] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0077] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0078] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where Re (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0079] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0080] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0081] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0082] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0083] In one subclass of this class, Re (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0084] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0085] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0086] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0087] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0088] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0089] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0090] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0091] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0092] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0093] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0094] In one embodiment, or in combination with any other embodiment, N z is -1.5 to 1.5. In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.95 to 1.02, and the ratio of Re(650 nm) / Re(550 nm) is 0.95 to 1.05, where Re(450 nm), Re(550 nm), and Re(650 nm) are the in-plane retardations measured at 450 nm, 550 nm, and 650 nm, respectively.

[0095] In a subclass of this class, Re(589 nm) is −240 nm to −320 nm, and Rth(589 nm) is −60 nm to 60 nm. In a subclass of this class, Re(589 nm) is −120 nm to −160 nm, and Rth(589 nm) is −30 nm to 30 nm.

[0096] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th(589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.75 to 0.95, and R e (550nm) e (650 nm) ratio is 0.97 to 1.15.

[0097] In a subclass of this class, Re(589 nm) is -120 nm to -160 nm, and Rth(589 nm) is -30 nm to 30 nm. In a subclass of this class, Re(589 nm) is -240 nm to -320 nm, and R th (589nm) is -30nm to 30nm.

[0098] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0099] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0100] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0101] In one class of this embodiment, Re (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0102] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0103] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0104] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0105] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0106] In one subclass of this class, Re (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0107] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0108] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0109] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0110] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0111] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is 0.15 to 4.2.

[0112] In a subclass of this embodiment, the ratio of Re(450 nm) / Re(550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0113] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0114] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0115] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0116] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0117] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0118] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0119] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0120] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0121] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550 nm) is the in-plane retardation measured at 550 nm. In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0122] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0123] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0124] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0125] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0126] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0127] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0128] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0129] In one embodiment, or in combination with any other embodiment, N z is 0.3 to 0.7. In one class of this embodiment, Re (589nm) is -120~-320nm, R th (589nm) is -60 to 60nm.

[0130] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, R e (450nm) / R e (550 nm) ratio is 0.95 to 1.02, and R e (650nm) / R e The ratios of Re(450 nm), Re(550 nm), and Re(650 nm) are 0.95 to 1.05, where Re(450 nm), Re(550 nm), and Re(650 nm) are the in-plane retardations measured at 450 nm, 550 nm, and 650 nm, respectively.

[0131] In a subclass of this class, Re(589 nm) is −240 nm to −320 nm, and Rth(589 nm) is −60 nm to 60 nm. In a subclass of this class, Re(589 nm) is −120 nm to −160 nm, and Rth(589 nm) is −30 nm to 30 nm.

[0132] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, R e (450nm) / R e (550 nm) is 0.75 to 0.95, and R e (650nm) / R e (550nm) ratio is 0.97 to 1.15.

[0133] In a subclass of this class, Re(589 nm) is -120 nm to -160 nm, and Rth(589 nm) is -30 nm to 30 nm. In a subclass of this class, Re(589 nm) is -240 nm to -320 nm, and R th (589nm) is -30nm to 30nm.

[0134] In one class of this embodiment, the ratio Re(589 nm) / d(nm) multiplied by 1000 is between −6.0 and −0.5; th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.8 to 1.8.

[0135] In one subclass of this class, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0136] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0137] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0138] In one subclass of this class, Re (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0139] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0140] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0141] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0142] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0143] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0144] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0145] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0146] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0147] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550 nm) is the in-plane retardation measured at 550 nm. In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0148] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0149] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0150] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0151] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0152] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0153] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0154] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0155] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0156] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e(650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0157] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0158] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0159] In one embodiment, or in combination with any other embodiment, N z is 0.4~0.6. In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.95 to 1.02, and R e (650nm) / R e The ratios of Re(450 nm), Re(550 nm), and Re(650 nm) are 0.95 to 1.05, where Re(450 nm), Re(550 nm), and Re(650 nm) are the in-plane retardations measured at 450 nm, 550 nm, and 650 nm, respectively.

[0160] In a subclass of this class, Re(589 nm) is −240 nm to −320 nm, and Rth(589 nm) is −60 nm to 60 nm. In a subclass of this class, Re(589 nm) is −120 nm to −160 nm, and Rth(589 nm) is −30 nm to 30 nm.

[0161] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.75 to 0.95, and R e (650nm) / R e (550nm) ratio is 0.97 to 1.15.

[0162] In a subclass of this class, Re(589 nm) is -120 nm to -160 nm, and Rth(589 nm) is -30 nm to 30 nm. In a subclass of this class, Re(589 nm) is -240 nm to -320 nm, and R th (589nm) is -30nm to 30nm.

[0163] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0164] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0165] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0166] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0167] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0168] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0169] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e(450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0170] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0171] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0172] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0173] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0174] In one subclass of this class, R e (650nm) / R e(550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0175] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0176] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0177] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0178] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0179] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0180] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0181] In one embodiment, or in combination with any other embodiment, N z is 0.8 to 1.2. In one class of this embodiment, R e (589nm) is -120~-320nm, R th (589nm) is 60~120nm.

[0182] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.95 to 1.02, and R e (650nm) / R e The ratios of Re(450 nm), Re(550 nm), and Re(650 nm) are 0.95 to 1.05, where Re(450 nm), Re(550 nm), and Re(650 nm) are the in-plane retardations measured at 450 nm, 550 nm, and 650 nm, respectively.

[0183] In a subclass of this class, Re(589 nm) is −240 nm to −320 nm, and Rth(589 nm) is −60 nm to 60 nm. In a subclass of this class, Re(589 nm) is −120 nm to −160 nm, and Rth(589 nm) is −30 nm to 30 nm.

[0184] In one class of this embodiment, or in combination with any other class in this embodiment, R e (589nm) is -120nm to -320nm, R th (589 nm) is -60 nm to 60 nm, the ratio of Re(450 nm) / Re(550 nm) is 0.75 to 0.95, and R e (650nm) / R e (550nm) ratio is 0.97 to 1.15.

[0185] In a subclass of this class, Re(589 nm) is -120 nm to -160 nm, and Rth(589 nm) is -30 nm to 30 nm. In a subclass of this class, Re(589 nm) is -240 nm to -320 nm, and R th (589nm) is -30nm to 30nm.

[0186] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -6.0 to -0.5, and R th The ratio of (589 nm) to d (nm) multiplied by 1000 is 0.15 to 4.2.

[0187] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0188] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0189] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0190] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0191] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0192] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0193] In one class of this embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is -8.0 to -0.5, and R th The ratio of (589 nm) / d(nm) multiplied by 1000 is 0.15 to 5.6.

[0194] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0195] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0196] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0197] In a subclass of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, Re (550nm) is the in-plane retardation measured at 550nm.

[0198] In a subclass of this subclass, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0199] In a subclass of this subclass, R e (650nm) / R e (550 nm) is 1.10 to 1.2, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0200] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0201] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0202] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where Re (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0203] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0204] In one class of this embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0205] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0206] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0207] In one subclass of this class, R e (650nm) / Re (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0208] In one class of this embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0209] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0210] In one subclass of this class, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0211] In one subclass of this class, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0212] In one embodiment, or in combination with any other embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is −6.0 to −0.5. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −3.0 to 3.0. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −2.0 to 2.0. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −1.8 to 1.8. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0213] In one embodiment, or in combination with any other embodiment, R e The ratio of (589 nm) / d(nm) multiplied by 1000 is −8.0 to −0.5. th The ratio of (589 nm) / d(nm) multiplied by 1000 is −3.0 to 3.0. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −2.4 to 2.4. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −1.8 to 1.8. In one class of this embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0214] In one embodiment, or in combination with any other embodiment, R th The ratio of (589 nm) / d(nm) multiplied by 1000 is −3.0 to 3.0. th The ratio of (589 nm) / d(nm) multiplied by 1000 is −2.0 to 2.0. thThe ratio of (589 nm) / d(nm) multiplied by 1000 is −1.8 to 1.8. th The ratio of (589 nm) / d(nm) multiplied by 1000 is -1.0 to 1.0.

[0215] In one embodiment, or in combination with any other embodiment, R e (450nm) / R e (550 nm) is less than 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0216] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0217] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0218] In one class of this embodiment, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0219] In one embodiment, or in combination with any other embodiment, R e (450nm) / R e (550 nm) is less than 1.0, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0220] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0221] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0222] In one class of this embodiment, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0223] In one embodiment, or in combination with any other embodiment, R e (450nm) / R e (550 nm) is less than 0.9, where R e (450nm) is the in-plane retardation measured at 450nm, R e(550nm) is the in-plane retardation measured at 550nm.

[0224] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0225] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0226] In one class of this embodiment, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0227] In one embodiment, or in combination with any other embodiment, R e (450nm) / R e (550 nm) is 0.75 to 0.85, where R e (450nm) is the in-plane retardation measured at 450nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0228] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 0.95, where Re (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0229] In one class of this embodiment, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0230] In one class of this embodiment, R e (650nm) / R e (550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0231] In one embodiment, or in combination with any other embodiment, R e (650nm) / R e (550 nm) is greater than 0.95, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550 nm) is the in-plane retardation measured at 550 nm. In one embodiment, or in combination with any other embodiment, R e (650nm) / R e (550 nm) is greater than 1.0, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550 nm) is the in-plane retardation measured at 550 nm. In one embodiment, or in combination with any other embodiment, R e (650nm) / R e(550 nm) is 1.10 to 1.25, where R e (650nm) is the in-plane retardation measured at 650nm, R e (550nm) is the in-plane retardation measured at 550nm.

[0232] In one embodiment, or in combination with any other embodiment, the film is uniaxially stretched, biaxially stretched, or stretched at each angle. In one class of this embodiment, the film is uniaxially stretched or biaxially stretched. In one class of this embodiment, the film is uniaxially stretched. In one class of this embodiment, the film is biaxially stretched. In one class of this embodiment, the film is stretched at each angle.

[0233] In one embodiment, or in combination with any other embodiment, the film is stretched along the machine direction. In one embodiment, or in combination with any other embodiment, the film is shrinked along the machine direction. In one embodiment, or in combination with any other embodiment, the film is stretched along the cross direction. In one embodiment, or in combination with any other embodiment, the film is shrinked along the cross direction.

[0234] In one embodiment, or in combination with any other embodiment, the slow axis in the film plane forms an angle of 0° to 180° with respect to the machine direction of the film. In one embodiment, or in combination with any other embodiment, the slow axis in the film plane forms an angle of 0° to 90° with respect to the machine direction of the film. In one embodiment, or in combination with any other embodiment, the slow axis in the film plane forms an angle of 90° to 180° with respect to the machine direction of the film. In one embodiment, or in combination with any other embodiment, the slow axis in the film plane forms an angle of 45° to 145° with respect to the machine direction of the film. In one embodiment, or in combination with any other embodiment, the slow axis in the film plane forms an angle of 75° to 115° with respect to the machine direction of the film.

[0235] In one embodiment, or in combination with any other embodiment, the film comprises less than 10 wt% of unsubstituted or substituted (2-hydroxyphenyl)(phenyl)methanone or unsubstituted or substituted 2H-chromen-2-one. In one embodiment, or in combination with any other embodiment, the film comprises less than 5 wt% of unsubstituted or substituted (2-hydroxyphenyl)(phenyl)methanone or unsubstituted or substituted 2H-chromen-2-one. In one embodiment, or in combination with any other embodiment, the film comprises less than 1 wt% of unsubstituted or substituted (2-hydroxyphenyl)(phenyl)methanone or unsubstituted or substituted 2H-chromen-2-one. In one embodiment, or in combination with any other embodiment, the film comprises less than 0.1 wt% of unsubstituted or substituted (2-hydroxyphenyl)(phenyl)methanone or unsubstituted or substituted 2H-chromen-2-one. In one embodiment, or in combination with any other embodiment, the film contains less than 0 wt % unsubstituted or substituted (2-hydroxyphenyl)(phenyl)methanone or unsubstituted or substituted 2H-chromen-2-one.

[0236] In one embodiment, or in combination with any other embodiment, component A is present at greater than 1 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 30 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 20 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 15 wt%.

[0237] In one embodiment, or in combination with any other embodiment, component A is

[0238] [ka]

[0239] In one class of this embodiment, component A is present at greater than 1 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0240] In one embodiment, or in combination with any other embodiment, component A is

[0241] [ka]

[0242] In one class of this embodiment, component A is present at greater than 1 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In one class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0243] In one embodiment, or in combination with any other embodiment, component A is selected from the group consisting of 1,3-diphenyl-1,3-propanedione, avobenzone, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(hexyloxy)phenol, 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-[2-hydroxy-3-(dodecyloxy- and tridecyloxy)propoxy]phenol, isooctyl 2-(4-(4,6-di([1,1′-biphenyl]-4-yl)-1,3,5-triazin-2-yl) ... 2-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-5-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol, or a combination thereof.

[0244] In one class of this embodiment, component A is present at greater than 1 wt%. In one class of this embodiment, component A is present in the range of 1 wt% to 30 wt%. In one class of this embodiment, component A is present in the range of 1 wt% to 20 wt%. In one class of this embodiment, component A is present in the range of 1 wt% to 15 wt%.

[0245] In one embodiment, or in combination with any other embodiment, component A is 1,3-diphenyl-1,3-propanedione. In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0246] In one embodiment, or in combination with any other embodiment, component A is avobenzone. In a class of this embodiment, component A is present at greater than 1 wt.%. In a class of this embodiment, component A is present in the range of 1 wt.% to 30 wt.%. In a class of this embodiment, component A is present in the range of 1 wt.% to 20 wt.%. In a class of this embodiment, component A is present in the range of 1 wt.% to 15 wt.%.

[0247] In one embodiment, or in combination with any other embodiment, component A is 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(hexyloxy)phenol (Tinuvin® 1577). In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0248] In one embodiment, component A is isooctyl 2-(4-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-3-hydroxyphenoxy)propanoate (Tinuvin® 479). In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0249] In one embodiment, component A is 2-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-5-((2-ethylhexyl)oxy)phenol (Tinuvin® 1600). In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0250] In one embodiment, or in combination with any other embodiment, component A is 6,6'-(6-(2,4-dibutoxyphenyl)-1,3,5-triazine-2,4-diyl)bis(3-butoxyphenol) (Tinuvin® 460). In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0251] In one embodiment, or in combination with any other embodiment, component A is 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol. In a class of this embodiment, component A is present at greater than 1 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 30 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 20 wt %. In a class of this embodiment, component A is present in the range of 1 wt % to 15 wt %.

[0252] In one embodiment, or in combination with any other embodiment, the cellulose ester has a first unsaturated or saturated (C 1~6) Alkyl-Acyl Substituent ("DS FAk In one embodiment, the cellulose ester has a degree of substitution of 0.7 to 1.9 of primary unsaturation or saturation (C 1~6 ) Alkyl-Acyl Substituent ("DS FAk ").

[0253] In one class of this embodiment, the first unsaturated or saturated (C 1~20 ) alkyl-CO-substituent is acetyl, propionyl, butyryl, isobutyryl, 3-methylbutanoyl, pentanoyl, 4-methylpentanoyl, 3-methylpentanoyl, 2-methylpentanoyl, hexanoyl, or crotonyl. In one class of this embodiment, the first unsaturated or saturated (C 1~6 ) The alkyl-CO-substituent is acetyl, propionyl, or crotonyl.

[0254] In one embodiment, or in combination with any other embodiment, the cellulose ester is a first (C 1~6 ) alkyl-CO-, or a plurality of second unsaturated or saturated (C 1~20 ) alkyl-CO-substituents. In one class of this embodiment, a second unsaturated or saturated (C 1~20 ) alkyl-CO-substituent ("DS SAk ") has a degree of substitution of 0.05 to 0.6.

[0255] In one class of this embodiment, the second unsaturated or saturated (C 1~20 The alkyl-CO-substituent is acetyl, propionyl, butyryl, isobutyryl, 3-methylbutanoyl, pentanoyl, 4-methylpentanoyl, 3-methylpentanoyl, 2-methylpentanoyl, hexanoyl, pivalyl, or 2-ethylhexanoyl. In one class of this embodiment, the second unsaturated or saturated (C 1~20) alkyl-CO- substituents are acetyl, isobutyryl, 3-methylbutanoyl, pentanoyl, 4-methylpentanoyl, 3-methylpentanoyl, 2-methylpentanoyl, hexanoyl, or 2-ethylhexanoyl. In one class of this embodiment, the second unsaturated or saturated (C 1~20 ) The alkyl-CO-substituent is acetyl or 2-ethylhexanoyl.

[0256] In one embodiment, or in combination with any other embodiment, the aromatic -CO- is (C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1 In one class of this embodiment, the aromatic -CO- is unsubstituted or substituted by 1 to 5 R 1 In a class of this embodiment, the aromatic -CO- is unsubstituted or is substituted with 1 to 5 R 1 In one class of this embodiment, the aromatic -CO- is unsubstituted or is substituted with 1 to 5 R 1 is naphthoyl substituted by

[0257] In one embodiment, or in combination with any other embodiment, the aromatic -CO- is unsubstituted or has 1 to 5 R 1 In one class of this embodiment, the cellulose ester has a total DS of 0.40 to 1.60. ArCO In a subclass of this class, C2DS ArCO and C3DS ArCO The sum is 0.30 to 1.25.

[0258] In one class of this embodiment, the cellulose ester has a total DS of 0.50 to 1.50. ArCO In a subclass of this class, C2DS ArCO and C3DS ArCOThe sum is 0.30 to 1.20.

[0259] In one embodiment, or in combination with any other embodiment, the aromatic -CO- is unsubstituted or has 1 to 5 R 1 In a class of this embodiment, the cellulose ester has a total DS of 0.30 to 0.6. ArCO In a subclass of this class, C2DS ArCO and C3DS ArCO The sum of is 0.20 to 0.40. In one subclass of this class, C2DS ArCO and C3DS ArCO The sum is 0.30 to 0.40.

[0260] In one class of this embodiment, the cellulose ester has a total DS of 0.50 to 1.10. ArCO In a subclass of this class, C2DS ArCO and C3DS ArCO The sum of is 0.20 to 0.40. In one subclass of this class, C2DS ArCO and C3DS ArCO The sum is 0.30 to 0.40.

[0261] In one embodiment, or in combination with any other embodiment, aromatic -CO- is heteroaryl-CO-, where heteroaryl is a 5-10 membered ring having 1-4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or has 1-5 R 1 In a class of this embodiment, heteroaryl-CO- is pyridinyl-CO-, pyrimidinyl-CO-, furanyl-CO-, or pyrrolyl-CO-. In a class of this embodiment, heteroaryl-CO- is 2-furoyl.

[0262] In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.4 to 1.6. ArCOIn one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 1.0 to 1.6. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.3 to 1.25. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.4 to 1.2. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.4 to 0.8. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.3 to 0.8. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.3 to 0.6. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.2 to 0.6. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.2 to 0.5. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.8 to 1.2. ArCO In one embodiment, or in combination with any other embodiment, the cellulose ester has a total DS of 0.5 to 1.1. ArCO has.

[0263] In one embodiment, or in combination with any other embodiment, DS OH In one embodiment, or in combination with any other embodiment, DS OH In one embodiment, or in combination with any other embodiment, DS OH In one embodiment, or in combination with any other embodiment, DS OHIn one embodiment, or in combination with any other embodiment, DS OH In one embodiment, or in combination with any other embodiment, DS OH In one embodiment, or in combination with any other embodiment, DS OH is 0.5 to 0.8.

[0264] In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.3 to 1.25. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.2 to 0.4. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.3 to 0.4. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.4 to 1.2. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.4 to 1.1. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.4 to 1.0. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.5 to 1.1. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum of is 0.6 to 1.0. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCOThe sum of is 0.6 to 1.25. In one embodiment, or in combination with any other embodiment, C2DS ArCO and C3DS ArCO The sum is 0.30 to 0.75.

[0265] In one embodiment, or in combination with any other embodiment, component A is present at greater than 1 wt%. In one embodiment, or in combination with any other embodiment, component A is present at greater than 2.5 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 30 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 2.5 wt% to 30 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 5 wt% to 30 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 2.5 wt% to 25 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 30 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 20 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 18 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 15 wt%. In one embodiment, or in combination with any other embodiment, component A is present in the range of 1 wt% to 10 wt%.

[0266] In one embodiment, or in combination with any other embodiment, m is 1. In one embodiment, or in combination with any other embodiment, m is 2. In one embodiment, or in combination with any other embodiment, m is 3. In one embodiment, or in combination with any other embodiment, m is 4. In one embodiment, or in combination with any other embodiment, m is 5. In one embodiment, or in combination with any other embodiment, m is 1, 2, 3 or 4. In one embodiment, or in combination with any other embodiment, m is 1, 2 or 3. In one embodiment, or in combination with any other embodiment, m is 1 or 2.

[0267] In one embodiment, or in combination with any other embodiment, n is 1. In one embodiment, or in combination with any other embodiment, n is 2. In one embodiment, or in combination with any other embodiment, n is 3. In one embodiment, or in combination with any other embodiment, n is 4. In one embodiment, or in combination with any other embodiment, n is 5. In one embodiment, or in combination with any other embodiment, n is 1, 2, 3 or 4. In one embodiment, or in combination with any other embodiment, n is 1, 2 or 3. In one embodiment, or in combination with any other embodiment, n is 1 or 2.

[0268] Plasticizer may be added to improve the processability and flexibility of film.This can lower the glass transition point and the melting temperature of the material that forms the film, and thus facilitate the temperature reduction and / or simplification of film production.Plasticizer should be compatible with the cellulose ester disclosed herein, and should have a boiling point higher than the maximum temperature that is applied in the film preparation and conditioning process that requires non-volatile plasticizer compound, especially when film formation is performed by melt casting.

[0269] In one embodiment, or in combination with any other embodiment, the film further comprises 0.1 to 15 wt % of a plasticizer. In one class of this embodiment, or in combination with any other class of this embodiment, the plasticizer is present at 0.1 to 10 wt%. In one class of this embodiment, or in combination with any other class of this embodiment, the plasticizer is present at 0.1 to 5 wt%. In one class of this embodiment, or in combination with any other class of this embodiment, the plasticizer is present at 5 to 10 wt%. In one class of this embodiment, or in combination with any other class of this embodiment, the plasticizer is present at 3 to 7 wt%.

[0270] In one class of this embodiment, or in combination with any other class within this embodiment, the plasticizer is selected from phosphate-type plasticizers, phthalate-type plasticizers, terephthalate-type plasticizers, trimellitate-type plasticizers, benzoate-type plasticizers, glycolate-type plasticizers, citrate-type plasticizers, polyhydric alcohol ester-type plasticizers, polyol-type plasticizers, sugar ester-type plasticizers, cellulose ester-type plasticizers, or polyester-type plasticizers. In a subclass of this class, the plasticizer is selected from Non-limiting examples of glycolate plasticizers include methylphthalyl methyl glycolate, ethylphthalyl ethyl glycolate, propylphthalyl propyl glycolate, butylphthalyl butyl glycolate, octylphthalyl octyl glycolate, methylphthalyl ethyl glycolate, ethylphthalyl methyl glycolate, ethylphthalyl propyl glycolate, methylphthalyl butyl glycolate, ethylphthalyl butyl glycolate, butylphthalyl methyl glycolate, butylphthalyl ethyl glycolate, propylphthalyl butyl glycolate, butylphthalyl propyl glycolate, methylphthalyl octyl glycolate, ethylphthalyl octyl glycolate, octylphthalyl methyl glycolate and octylphthalyl ethyl glycolate.

[0271] Non-limiting examples of phosphate type plasticizers include triphenyl phosphate and tricresyl phosphate. Non-limiting examples of citrate-type plasticizers include triacetyl citrate and tributyl citrate.

[0272] Non-limiting examples of benzoate type plasticizers include 2-naphthyl benzoate (BANE), dipropylene glycol dibenzoate, 1,4-cyclohexanedimethanol dibenzoate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate, and diethylene glycol dibenzoate.

[0273] Non-limiting examples of phthalate-type plasticizers include dicyclohexyl phthalate, dibenzyl phthalate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, diphenyl phthalate, and dihexyl phthalate.

[0274] Non-limiting examples of terephthalate type plasticizers include dimethyl terephthalate, diethyl terephthalate, dibutyl terephthalate, di-2-ethylhexyl terephthalate, diphenyl terephthalate, and dihexyl terephthalate.

[0275] Non-limiting examples of polyester-type plasticizers include adipic polyesters such as Admex 523, Admex 6995, and Admex 760. Non-limiting examples of polyol type plasticizers include cyclohexane-1,4-dimethanol, sorbitol, 1,3-propanediol, ethylene glycol, glycerin, triethylene glycol, tetramethylene glycol, trimethylolpropane, and xylitol.

[0276] Non-limiting examples of polyhydric alcohol ester type plasticizers include triethylene glycol bis(2-ethylhexanoate), dipropylene glycol dibenzoate, and diethylene glycol dibenzoate. Non-limiting examples of trimellitate type plasticizers include tris(2-ethylhexanoate) trimellitate, and cresyl diphenyl phosphate.

[0277] Non-limiting examples of cellulose ester type plasticizers include cellulose acetate, cellulose propionate, cellulose butyrate, cellulose acetate propionate, and cellulose acetate butyrate.

[0278] In one embodiment, or in combination with any other class in this embodiment, the plasticizer is triphenyl phosphate, diethyl phthalate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate, 1,4-cyclohexane dibenzoate, 2-naphthyl benzoate, triethylene glycol bis(2-ethylhexanoate), a polyester having a weight average molecular weight of less than 10,000 g / mol, a cellulose ester having a weight average molecular weight of less than 10,000 g / mol, or a combination thereof.

[0279] In one embodiment, or in combination with any other classes within this embodiment, the plasticizer is a plasticizer having one or more aromatic groups. The films disclosed in this application are useful in LCD, OLED, and QD OLED devices. This application discloses devices that include any of the films disclosed above.

[0280] In one embodiment, the device is a liquid crystal display (LCD), an organic light emitting diode (OLED), or a quantum dot organic light emitting diode (QD OLED) device. In a class of this embodiment, the device is an LCD device. In a class of this embodiment, the device is an OLED device. In a class of this embodiment, the device is a QD OLED device.

[0281] The present application also provides a method for preparing a compound comprising the steps of: (1) (i) a plurality of aromatic -CO- substituents; (ii) a plurality of first unsaturated or saturated (C 1~6 ) alkyl-CO-substituents, and (iii) multiple hydroxyl substituents, wherein the degree of substitution of the hydroxyl ("DS OH ") is 0.2 to 1.1, and the cellulose ester has a C2 degree of substitution ("C2DS ArCO "), and the cellulose ester has a C3 degree of substitution of aromatic -CO- substituents ("C3DS ArCO "), and the cellulose ester has a C6 degree of substitution of aromatic -CO- substituents of 0.05 to 0.6 ("C6DS ArCO "), and the total degree of substitution of aromatic -CO- substituents ("Total DS ArCO ") is 0.25 to 2.0, and aromatic -CO- is (i) (C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1 or (ii) heteroaryl-CO-, wherein heteroaryl is a 5-10 membered ring having 1-4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or substituted with 1-5 R 1 and (2) a regioselectively substituted cellulose ester,

[0282] [ka]

[0283] [Wherein: Ring A is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring B is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring C is (C 6~20 ) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R1 are independently saturated or unsaturated (C 1~20 ) alkyl; saturated or unsaturated halo(C 1~20 ) alkyl; saturated or unsaturated (C 1~20 )alkoxy;saturated or unsaturated halo(C 1~20 ) alkoxy; unsubstituted or substituted with 1 to 5 alkyl, haloalkyl, alkoxy, haloalkoxy, halo (C 6~20 ) aryl; 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; or -CH 2 C(O)-R 3 ;R 2 are independently hydrogen, saturated or unsaturated (C 1~20 ) alkyl, or saturated or unsaturated halo(C 1~20 ) alkyl; each R 3 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, (C 6~20 ) aryl, or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, where the aryl or heteroaryl is unsubstituted or is selected from 1-5 R 6 Each R 4 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~20 ) aryl, or containing 1 to 4 heteroatoms selected from N, O, or S, unsubstituted or containing 1 to 5 R 6 wherein each group is unsubstituted or substituted with 1 to 3 hydroxyl, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or an unsubstituted or substituted 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R 6 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, halo, (C 6~20 ) aryl, 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, saturated or unsaturated hydroxy (C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, where each group is unsubstituted or contains 1 to 5 R 7 has been replaced by; Each R 7 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) alkyl, saturated or unsaturated hydroxy (C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkoxy-(C1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkoxy; each R 9 are independently 4 -O-, hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-O-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~10 ) aryl, unsubstituted or containing 1 to 4 heteroatoms selected from N, O, or S; 6 and wherein each group is unsubstituted or substituted with 1 to 3 hydroxy, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, or saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20)Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or substituted by a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, which are unsubstituted or substituted; each n is independently 0, 1, 2, 3, 4, or 5; each m is independently 0, 1, 2, 3, 4, or 5; and k is independently 0, 1, 2, 3, or 4, wherein: component A is present in less than 30 wt%, based on the total weight of the composition.

[0284] Embodiment Embodiment 1. (1) (i) a plurality of aromatic -CO- substituents, (ii) a plurality of first unsaturated or saturated (C 1~6 ) alkyl-CO-substituents, and (iii) multiple hydroxyl substituents, wherein the degree of substitution of the hydroxyl ("DS OH ") is 0.2 to 1.1, and the cellulose ester has a C2 degree of substitution ("C2DS ArCO "), and the cellulose ester has a C3 degree of substitution of aromatic -CO- substituents ("C3DS ArCO "), and the cellulose ester has a C6 degree of substitution of aromatic -CO- substituents of 0.05 to 0.6 ("C6DS ArCO "), and the total degree of substitution of aromatic -CO- substituents ("Total DS ArCO ") is 0.25 to 2.0, and aromatic -CO- is (i) (C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1or (ii) heteroaryl-CO-, wherein heteroaryl is a 5-10 membered ring having 1-4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or substituted with 1-5 R 1 and (2) a regioselectively substituted cellulose ester,

[0285] [ka]

[0286] [Wherein: Ring A is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring B is (C 6~20 )aryl or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Ring C is (C 6~20 ) aryl or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R 1 are independently saturated or unsaturated (C 1~20 ) alkyl; saturated or unsaturated halo(C 1~20 ) alkyl; saturated or unsaturated (C 1~20 )alkoxy;saturated or unsaturated halo(C 1~20 ) alkoxy; unsubstituted or substituted with 1 to 5 alkyl, haloalkyl, alkoxy, haloalkoxy, halo (C 6~20 ) aryl; 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; or -CH 2 C(O)-R 3 ;R 2 are independently hydrogen, saturated or unsaturated (C 1~20 ) alkyl, or saturated or unsaturated halo(C 1~20 ) alkyl; each R 3 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20) alkyl, (C 6~20 ) aryl, or a 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, where the aryl or heteroaryl is unsubstituted or is selected from 1-5 R 6 Each R 4 are independently saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~20) aryl, or containing 1 to 4 heteroatoms selected from N, O, or S, unsubstituted or containing 1 to 5 R 6 wherein each group is unsubstituted or substituted with 1 to 3 hydroxyl, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or an unsubstituted or substituted 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S; each R 6 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C1~20 ) alkoxy, saturated or unsaturated halo(C 1~20 ) alkoxy, halo, (C 6~20 ) aryl, 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S, saturated or unsaturated hydroxy (C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, where each group is unsubstituted or contains 1 to 5 R 7 has been replaced by; Each R 7 are independently hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) alkyl, saturated or unsaturated hydroxy (C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) Alkoxy, saturated or unsaturated (C 1~20 )Alkoxy-(C1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkoxy; each R 9 are independently 4 -O-, hydroxy, cyano, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated hetero (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 ) Alkyl-O-CO, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-O-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or having 1 to 5 R 6 is replaced by (C 6~10 ) aryl, unsubstituted or containing 1 to 4 heteroatoms selected from N, O, or S; 6and wherein each group is unsubstituted or substituted with 1 to 3 hydroxy, saturated or unsaturated (C 1~20 ) alkyl, saturated or unsaturated halo(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 ) alkoxy, or saturated or unsaturated halo(C 1~20 ) alkoxy, saturated or unsaturated hydroxy (C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-hydroxy(C 1~20 ) alkyl, or saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-CO-(C 1~20 ) Alkyl-, saturated or unsaturated (C 1~20 ) Alkyl-CO, saturated or unsaturated (C 1~20 ) Alkyl-COO, saturated or unsaturated (C 1~20 )Alkyl-O-CO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkyl-COO-(C 1~20 ) Alkyl, saturated or unsaturated (C 1~20 )Alkoxy-(C 1~20 )Alkyl-COO-(C 1~20 ) alkyl, or (C 1~20 )Alkoxy-(C 1~20 )Alkyl-O-CO-(C 1~20 ) alkyl, unsubstituted or substituted (C 6~20 ) aryl, or 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O, or S, which are unsubstituted or substituted; each n is independently 0, 1, 2, 3, 4, or 5; each m is independently 0, 1, 2, 3, 4, or 5; k is independently 0, 1, 2, 3, or 4; ande (589 nm), and the film has a R of -100 nm to 100 nm. th (589 nm), and the film has an R e (450nm) / R e (550 nm), the film has an R of 0.9 to 1.25 e (650nm) / R e (550 nm), the film has a [[-R th (589nm) / R e (589 nm)]+0.5]("N z ") and each R th (589 nm) is the out-of-plane retardation measured at 589 nm, and each R e (589 nm), R e (450 nm), R e (550 nm) are the in-plane retardation measured at 589 nm, 450 nm, and 550 nm, respectively, for the film when stretched.

[0287] Embodiment 2. The film of embodiment 1, which is stretched at a temperature between 100°C and 220°C. Embodiment 3. The film is T g -30℃~T g +50° C., where T g The film of any one of embodiments 1-2, wherein is the glass transition temperature of the film.

[0288] Embodiment 4. R e (589nm) is -120~-320nm, R th The film of any one of embodiments 1 to 3, wherein (589 nm) is −60 to 60 nm. Embodiment 5. R e (450nm) / R e (550 nm) is 0.75 to 1.05, where R e (450nm) is the in-plane retardation measured at 450nm, and R e The film of any one of embodiments 1-4, wherein (550nm) is the in-plane retardation measured at 550nm.

[0289] Embodiment 6. R e (450nm) / R e The film of embodiment 5, wherein the ratio of (550 nm) is 0.75 to 0.85. Embodiment 7. Component A is

[0290] [ka]

[0291] The film of any one of embodiments 1 to 6, wherein Embodiment 8. The compound A is selected from the group consisting of 1,3-diphenyl-1,3-propanedione, avobenzone, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(hexyloxy)phenol, 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-[2-hydroxy-3-(dodecyloxy and tridecyloxy)propoxy]phenol, isooctyl 2-(4-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-3-hydroxyphenoxy)propanoate, 8. The film of any one of embodiments 1-7, wherein the phenol is 6,6'-(6-(2,4-dibutoxyphenyl)-1,3,5-triazine-2,4-diyl)bis(3-butoxyphenol), 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol, 2-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-5-((2-ethylhexyl)oxy)phenol, or a combination thereof.

[0292] Embodiment 9. The aromatic -CO- is (C 6~20 aryl-CO-, wherein aryl is unsubstituted or has 1 to 5 R 1 The film of any one of embodiments 1 to 8, wherein

[0293] Embodiment 10. The aromatic -CO- is unsubstituted or has 1 to 5 R 1 The film of embodiment 9, wherein the substituted aryl group is benzoyl or naphthoyl. Embodiment 11. The aromatic -CO- is unsubstituted or has 1 to 5 R 1 11. The film of embodiment 10, wherein the benzoyl is substituted by

[0294] Embodiment 12. The cellulose ester has a total DS of 0.50 to 1.60. ArCO 12. The film of embodiment 11, having Embodiment 13. C2DS ArCO and C3DS ArCO The film of embodiment 12, wherein the sum of is 0.30 to 1.25.

[0295] Embodiment 14. The aromatic -CO- is unsubstituted or has 1 to 5 R 1 14. The film of embodiment 13, wherein the naphthoyl is substituted by Embodiment 15. The cellulose ester has a total DS of 0.3 to 0.8. ArCO 15. The film of embodiment 14, having

[0296] Embodiment 16. C2DS ArCO and C3DS ArCO The film of embodiment 15, wherein the sum of is 0.2 to 0.6. Embodiment 17. The cellulose ester is a polymer having a plurality of second (C 1~20 17. The film of any one of embodiments 1-16, further comprising an alkyl-CO-substituent.

[0297] Embodiment 18. The film of any one of embodiments 1-17, further comprising one or more plasticizers. Embodiment 19. The film of embodiment 18, wherein the plasticizer is a phosphate ester plasticizer, a phthalate ester plasticizer, a mono- or dibenzoic acid plasticizer, a sugar ester plasticizer, a glycol ester plasticizer, a polyester plasticizer, a cellulose ester plasticizer, or a combination thereof.

[0298] Embodiment 20. The film of any one of embodiments 18 or 19, wherein the plasticizer is triphenyl phosphate, diethyl phthalate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate, 1,4-cyclohexane dibenzoate, 2-naphthyl benzoate, triethylene glycol bis(2-ethylhexanoate), a polyester having a weight average molecular weight of less than 10000 g / mol, a cellulose ester having a weight average molecular weight of less than 10000 g / mol, or a combination thereof.

[0299] Embodiment 21. The film of any one of embodiments 18-20, wherein the plasticizer is a plasticizer having one or more aromatic groups. Embodiment 22. The film of any one of embodiments 1-20, wherein the film is stretched along the machine direction ("MD"), contracted along the MD, stretched along the transverse direction ("TD"), contracted along the TD, or a combination thereof.

[0300] Embodiment 23. The film of any one of embodiments 1 to 21, wherein the slow axis in the plane of the film forms an angle of 0° to 180° with the MD of the film. EXAMPLES

[0301] Abbreviation 1MIM: 1-methylimidazole; 2EH or 2-EH: 2-ethylhexanoyl; 2EHCl: 2-ethylhexanoyl chloride; AcOH: acetic acid; Ak: alkyl acyl or alkyl-CO-; Ak1 is the same as Fak; Ak2 is the same as Sak; Ar: aryl; ArCO: aryl-acyl or aryl-CO-; atm: atmospheric pressure; Bz: benzoyl; BzCl: benzoyl chloride; Bz 2O: benzoic anhydride; °C: degrees Celsius; C2DS: degree of substitution at C2 position; C3DS: degree of substitution at C3 position; C6DS: degree of substitution at C6 position; CacPr: acetylpropionyl substituted cellulose ester or cellulose acetate propionate; CCrBz: crotonyl and benzoyl substituted cellulose ester or cellulose crotonate benzoate; CE: cellulose ester; Coc: octanoyl substituted cellulose ester or cellulose octanoate; CPN: cyclopentanone; CPr: propionyl substituted cellulose ester or cellulose propionate; CPrBz: propionyl and benzoyl substituted cellulose ester or cellulose propionate benzoate CPr2EH: propionyl and 2-ethylhexanoyl substituted cellulose esters or cellulose propionate 2-ethylhexanoate; CPr2EHBz: propionyl, 2-ethylhexanoyl and benzoyl substituted cellulose esters or cellulose propionate 2-ethylhexanoate benzoate; CPr2EHF: propionyl, 2-ethylhexanoyl and furanoyl substituted cellulose esters or cellulose propionate 2-ethylhexanoate furoate; CPr2EHNp: propionyl, 2-ethylhexanoyl and naphthoyl substituted cellulose esters or cellulose propionate 2-ethylhexanoate naphthoate (cellulose 2-ethylhexanoate naphthoate);CPrNp: propionyl and naphthoyl substituted cellulose esters or cellulose propionate naphthoate;CprAcBz: propionyl, acetyl and benzoyl substituted cellulose esters or cellulose propionate acetate benzoate;CCrBz: crotonyl, benzoyl substituted cellulose esters or cellulose crotonate benzoate;CPrPvNp: propionyl, pivaloyl and naphthoyl substituted cellulose esters or cellulose propionate pivalate naphthoate;DCM: dichloromethane;DEAMC: 7-diethylamino-4-methylcoumarin;DEP: diethyl phthalate;DHODPO: (2-hydroxy-4-methoxyphenyl)(2-hydroxyphenyl)methanone;BANE: 2-naphthyl benzoate;DMAC: dimethylacetamide;DMSO: dimethylsulfoxide;DPDO: 1,3-diphenylpropane-1,3-dione; DS: average degree of substitution; eq: equivalents; EtOH: ethanol; Ex: example; F: furan-2-CO-; Fak: first alkyl-acyl, Ak1 or first alkyl-CO-; Far: first aryl-acyl or first aryl-CO-; FCl: furan-2-carbonyl chloride; g: grams; HODPO: (2-hydroxy-4-(octyloxy)phenyl)(phenyl)methanone; i-PrOH: isopropanol; KOAc: potassium acetate; MEK: methyl ethyl ketone; hr or h: hours; L: liters; MeOH: methanol; min: minutes; mL: milliliters; μm: micrometers or microns; mol: moles; mol eq: molar equivalent relative to the number of moles of anhydroglucose units; NMP: N-methylpyrrolidone; Np: naphthoyl; NpCl: naphthoyl chloride; Pr: propionyl; Pr; 2 O: propionic anhydride; PrCl: propionyl chloride; RBF: round bottom flask; RM: reaction mixture; SM: starting material; Int; intermediate; rt: room temperature; Sak: second alkyl-acyl or second alkyl-CO-; Sar: second aryl-acyl or second aryl-CO-; TBMADMP: tributylmethylammonium dimethylphosphate; Tot.: total; TFA: trifluoroacetic acid; TFAA: trifluoroacetic anhydride; UV: ultraviolet.

[0302] NMR characterization: Proton NMR data were obtained on a JEOL Model Eclipse-600 NMR spectrometer operating at 600 MHz. The sample tube size was 5 mm and the sample concentration was 1 mL of DMSO-d 6 The mass of the sample was approximately 20 mg per sample. Each spectrum was recorded at 80 °C with 64 scans and a pulse delay of 15 seconds. One to two drops of trifluoroacetic acid-d were added to each sample to shift residual water out of the spectral region of interest. Chemical shifts are reported in parts per million ("ppm") from tetramethylsilane using the central peak of DMSO-d as an internal standard (2.49 ppm).

[0303] quantitative 13C NMR data were obtained on a JEOL Model GX-400 NMR spectrometer operating at 100 MHz. The sample tube size was 10 mm and the sample concentration was 1 mL of DMSO-d 6 The concentration was approximately 100 mg / mL per sample. Chromium(III) acetylacetonate was added to each sample at 5 mg per 100 mg of cellulose ester as a relaxation agent. Each spectrum was typically recorded at 80°C with 10,000 scans and a pulse delay of 1 second. Chemical shifts are reported in ppm from tetramethylsilane using the central peak of DMSO-d6 as an internal reference (39.5 ppm).

[0304] The proton and carbon NMR assignments, degree of substitution and relative degree of substitution ("RDS") of various acyl groups of the cellulose esters were determined by adapting the procedures disclosed in US2012 / 0262650.

[0305] DMTA measurements were performed on a TA Instruments DMA Q800 set at isothermal temperature for 5 min, followed by a temperature ramp from 25°C to 230°C at 3°C / min. The oscillation slippage was set at 0.1%. The onset of storage modulus can be used to determine the glass transition temperature (Tg) of the sample.

[0306] Differential scanning calorimetry (DSC) measurements were performed on a DSC Q2000 during the first heating from 0° C. to 200° C. or from 0° C. to 240° C., cooled back to 0° C., and reheated at a rate of 20° C. / min from 0° C. to 200° C. or from 0° C. to 240° C. The second heating curve was used to determine the glass transition temperature (Tg) of the samples.

[0307] Cellulose ester solutions for film preparation and film formulations were made by adapting the procedures disclosed in US2012 / 0262650. Solution preparation for film casting: Cellulose ester solids and additives were added to the solvent to give a final solution concentration of 8-16 wt%. Higher or lower solution concentrations may be used if desired. The mixture was sealed, placed on a roller, and mixed for 24 hours to create a homogenous solution.

[0308] The percentage of Component A or plasticizer in the film is defined as follows: Percentage of Component A or Plasticizer = Weight of Component A or Plasticizer / Total weight of cellulose ester, Component A, plasticizer and all other non-solvent ingredients added.

[0309] The concentration of the solution is defined as follows: Concentration of the solution = total weight of (cellulose ester, component A, plasticizer and all other ingredients excluding solvent) / total weight of (cellulose ester, component A, plasticizer, all other ingredients added and solvent).

[0310] The solvent used for preparing the solution may be, but is not limited to, cyclopentanone (CPN), DCM, a mixture of DCM with acetone, ethanol or methanol, such as acetone / DCM=10 / 90 (wt / wt), methanol / DCM=10 / 90 (wt / wt), methanol / DCM=5 / 95 and ethanol / DCM=10 / 90 (wt / wt), ethanol / DCM=5 / 95 (wt / wt).

[0311] Film casting: The above prepared solutions were cast on glass plates using a doctor blade to obtain films of desired thickness. Casting was done in a fume hood with relative humidity controlled at 45%-50%. After casting, when acetone / DCM=10 / 90 (wt / wt), methanol / DCM / methanol=10 / 90 (wt / wt) and ethanol / DCM=10 / 90 (wt / wt), methanol / DCM=5 / 95 (wt / wt), and ethanol / DCM=5 / 95 (wt / wt) were used as solvents, the films were dried under a cover pan for 60-110 min to minimize the rate of solvent evaporation, unless otherwise noted, before removing the pan. The films were allowed to dry for 15-30 min, then the films were peeled off the glass and annealed in a forced air oven at 100 °C for 10 min. After annealing at 100°C, the films were annealed at a higher temperature (120°C) for an additional 10 minutes. When CPN was used as the solvent, the films were dried under a cover pan for 75 minutes before the pan was removed unless otherwise noted. The films were further dried in the hood for an additional 2 hours before being peeled off the glass and annealed in a forced air oven at 100°C for 10 minutes. After annealing at 100°C, the films were annealed at a higher temperature (130°C) for an additional 10 minutes.

[0312] Film stretching: Film stretching was performed by a Bruckner Karo IV laboratory film stretcher. The stretching conditions, such as stretch ratio, stretching temperature, pre-heating and post-annealing, were varied to obtain specific optical retardation and dispersion depending on the application requirements.

[0313] The stretch ratio is defined as the final dimension of the film after stretching relative to the dimension of the film before stretching along one direction, as shown in Equation 1. For example, for a film uniaxially stretched from 100 mm to 140 mm along the MD, the stretch ratio is defined as 1.4. A stretch ratio less than 1.0 means the film has contracted along that direction.

[0314]

number

[0315] Optical measurements: The optical retardation and dispersion measurements of the films were performed using a JAWoollam M-2000V Spectroscopic Ellipsometer with a spectral range of 370-1000 nm or a JAWoollam RC2 Ellipsometer with a spectral range of 250-2500 nm. The in-plane retardation (R) of the optical films was measured using the RetMeas (Retardation Measurement) program manufactured by JAWoollam Co., Inc. e ) and out-of-plane retardation (R th ) was obtained. Film thickness was measured using a Metricon Prism Coupler 2010 (Metricon Corp.) or a handheld Positector 6000. Haze and b * Measurements were made using a HunterLab Ultrascan VIS colorimeter in diffuse transmittance mode (1 inch diameter port).

[0316] Chemicals: DEP, Admex™ 523, Admex™ 525, Admex™ 760 and Admex™ 6995, Solus™ 2100, Solus™ 2300, Benzoflex™ 352, Benzoflex™ 354 were obtained from Eastman Chemical Company, 1,3-diphenylpropane-1,3-dione, (2-hydroxy-4-(octyloxy)phenyl)(phenyl)methanone, (2-hydroxy-4-methoxyphenyl)(2-hydroxyphenyl)methanone and 7-diethylamino-4-methylcoumarin were obtained from Millipore was purchased from Sigma, (2-hydroxy-4-(octyloxy)phenyl)(phenyl)methanone was purchased from Alfa-Aesar, avobenzone was purchased from Tokyo Chemical Industry Co., Ltd., Tinuvin® 400, Tinuvin® 405 and Tinuvin® 1577 were purchased from Ciba Specialty Chemical Corp., Tinuvin® 460, Tinuvin® 1600 and Tinuvin® 479 were purchased from BASF.

[0317] Example 1 To a 5-neck round bottom flask was added TBMADMP (4405.2 g). The TBMADMP was heated at 100°C (5 h) under 1.20-1.80 mm Hg. After removal of vacuum, NMP (1887.9 g, 30 wt%) was added to the RM and the RM was cooled to room temperature. DPv610 cellulose (473.3 g, 7 wt%) was added to the RM over 20 min. The resulting RM was stirred at room temperature for 55 min. The mixture was stirred at 100°C (6 h), 30°C (3 h), and reheated to 102°C. The RM was charged with Pr 2 O (456 g, 1.2 equiv.) was added over 67 min. After 46 min, Bz 2 2115 g, 3.30 equiv.) was added to the RM over 20 min. The RM was stirred for 67 min and diluted with chilled 30% H 2 O 2(45 ml) was slowly added to the RM. The mixture was then stirred for 30 min. The crude product was dissolved in MeOH / H 2 After precipitation in O (95 / 5) solution, the material was filtered, washed with MeOH (5x) and dried under vacuum (55 mm Hg, 50°C) to give the title product. 1 H NMR Analysis:DS Pr =1.64 and DS Bz =0.69. 13 C NMR analysis: C6DS = 0.94, C3DS = 0.56, C2DS = 0.83. Integration of the benzoate carbonyl resonances gives 13 C NMR, C2DS Bz It also showed that +C3DSBz-C6DSBz=0.39.

[0318] Example 2 Ex2 contains 3.35 equivalents of Bz instead of 3.3 equivalents. 2 O was prepared by adapting the preparation procedure for Ex1.

[0319] [Table 1]

[0320] Intermediate 1 (CPr, DS pr =1.13) In a four-neck round-bottom flask, add N 2 iPrOH (259 g) was added under atmosphere with overhead stirring and bottom valve. The jacket was set at 41° C. To the reaction vessel was added Eastman™ CAP 482-20 (60 g, 1 molar equivalent) and the RM was stirred for 40 minutes. The RM was diluted with AcOH (4.63 g, 0.41 molar equivalent) and N in DMSO (259 g). 2 H 4 H 2 O (18.0 g, 1.89 mol equiv.) was added. The RM was stirred for 24 h. The crude product was precipitated by adding water. The crude product was filtered through a wash bag and washed with copious amounts of water. The solid was transferred to an aluminum pan and dried under vacuum (60° C.) overnight to give the title compound. 1 H NMR,13 C NMR:DS pr =1.13, DS OH =1.87, C2DS=0.26, C3DS=0.34, C6DS=0.53.

[0321] Intermediate 2 (CPr, DS Pr =1.16) Int 2 is prepared according to the same procedure as Int 1, with the exception of N 2 H 4 H 2 It was prepared by adding O (1.87 molar equivalents) and AcOH (0.4 molar equivalents) to Eastman™ CAP482-20 (1.0 molar equivalents). 1 H NMR, 13 C NMR:DS pr =1.16, DS OH =1.84, C2DS=0.26, C3DS=0.32, C6DS=0.57.

[0322] Intermediate 3 (CPr, DS Pr =1.18) Int 3 is prepared according to the same procedure as Int 1, with the exception of N 2 H 4 H 2 It was prepared by adding O (1.85 molar equivalents) and AcOH (0.4 molar equivalents) to Eastman™ CAP482-20 (1.0 molar equivalents). 1 H NMR, 13 C NMR:DS pr =1.18, DS OH =1.82, C2DS=0.28, C3DS=0.31, C6DS=0.59.

[0323] Intermediate 4 (CPr, DS pr =1.40) Int 4 is prepared according to the same procedure as Int 1, with the exception of N 2 H 4 H 2 It was prepared by adding O (1.57 molar equivalents) and AcOH (0.35 molar equivalents) to Eastman™ CAP482-20 (1.0 molar equivalents).1 H NMR, 13 C NMR:DS pr =1.40, DS OH =1.60, C2DS=0.32, C3DS=0.44, C6DS=0.63.

[0324] Intermediate 5 (CPr, DS pr =1.64) Int 5 is prepared according to the same procedure as Int 1, with the exception of N 2 H 4 H 2 It was prepared by adding O (1.25 molar equivalents) and AcOH (0.29 molar equivalents) to Eastman™ CAP482-20 (1.0 molar equivalents). 1 H NMR, 13 C NMR:DS pr =1.64, DS OH =1.36, C2DS=0.41, C3DS=0.52, C6DS=0.71.

[0325] Intermediate 6 (CPr, DS pr =1.10) Int 6 is prepared according to the same procedure as Int 1, with the exception of N 2 H 4 H 2 It was prepared by adding O (1.94 molar equivalents) and AcOH (0.42 molar equivalents) to Eastman™ CAP482-20 (1.0 molar equivalents). 1 H NMR, 13 C NMR:DS pr =1.10, DS OH =1.90, C2DS=0.23, C3DS=0.30, C6DS=0.58.

[0326] Intermediate 7 (CPr2EH, DS pr =1.13 and DS 2EH =0.49) Anhydrous DMAC (1.86 molar equivalents) and NMI (0.39 molar equivalents) were added to a jacketed 4-necked resin kiln reaction flask equipped with an overhead mechanical stirrer under nitrogen atmosphere. Int 1 (0.089 molar equivalents) was added to the RM and the RM was stirred (at 30° C.) for 48 h. Then 2-EHCl (0.52 molar equivalents) in DMAC (0.089 molar equivalents) was added slowly over 25 min. The RM was stirred (at 70° C.) for 16 h and the crude product was precipitated by addition of water (4 L). The solid was collected, washed successively with deionized water for 6 h, and dried under vacuum (55° C.) overnight to give the title compound. 1 H NMR and 13 C NMR:DS Pr =1.13, DS 2EH =0.49, DS OH =1.38, C2DS=0.38, C3DS=0.40, C6DS=0.85.

[0327] Intermediate 8 (Cellulose Acetate Propionate, DS Ac =0.17, DS pr =1.66, DS OH =1.17) Int 8 was prepared as described in US20090096962A (Ex18).

[0328] Intermediate 9 (CPr, DS Pr = 1.15) and 10 (cellulose propionate, DS Pr =1.41) N 2 H 4 H 2 Int 9 and 10 were synthesized by adapting the procedure for the synthesis of Int 1 with O and AcOH. Pr of 1 H and 13 Determined by C NMR.

[0329] Example 3 (CPrBz, Ds Pr = 1.15, Ds Bz =1.13) To a stirred mixture in a round bottom flask containing DMAC (172 mL, 21.2 molar equivalents) and 1-methylimidazole (32 mL, 4.5 molar equivalents) under nitrogen atmosphere was added Int 2 (20 g, 1.0 molar equivalents) dried under vacuum overnight. The RM was stirred at 50° C. for 4 h, cooled to 26° C., and then BzCl (14.2 g, 1.15 molar equivalents in DMAC (14 mL)) was added slowly into the RM over 1 h. The RM was stirred at 26° C. for 14 h. The crude product was iPrOH (2.2 L) which precipitated and the solid was washed with water (2×500 mL), successively with deionized water for 5 h, and dried under vacuum overnight to give the title compound. 1 H NMR and 13 C NMR:Ds Pr = 1.15, Ds Bz =1.13 (Table 3).

[0330] Ex4-Ex11, Ex25, Ex26, Ex27 and Ex28 were prepared by adapting the preparation procedure of Ex3 with the exception of using different SM and BzCl levels as shown in Table 2. The compounds were prepared as shown in Table 3. 1 H NMR and 13 It was characterized by C NMR.

[0331] Table 2 provides the preparation conditions of Ex3-11.

[0332] [Table 2]

[0333] Table 3 provides the NMR characterization of Ex3-11 and Ex25. Ex25 was prepared by adapting the procedure described herein.

[0334] [Table 3]

[0335] Example 12 (CprAcBz, Ds Pr = 1.66, DsAc = 0.17, Ds Bz =0.86) Ex12 was prepared by the same procedure as Ex 3, except for Int 8 (1.0 equiv., 20 g, CacPr, DS Ac 0.17 and DS Pr =1.66) and BzCl (10.2 g, 0.95 equiv.). 1 H NMR and 13 C NMR:Ds Pr = 1.66, Ds Ac = 0.17, Ds Bz =0.86 (Table 4).

[0336] Table 4 provides the NMR characterization of Ex12.

[0337] [Table 4]

[0338] Example 13 (CPr2EHBz, Ds Pr = 1.13, Ds Ac = 0.49, Ds Bz = 0.96) and 14 (CPr2EHBz, Ds Pr = 1.13, Ds Ac = 0.49, Ds Bz =1.02) Ex13 and 14 were prepared by adapting the procedure for the preparation of Ex 3. For Ex13, Int 7 (10 g, 1.0 molar equivalent) and BzCl (5.1 g, 0.98 molar equivalent) were used, and for Ex14, Int 7 (10 g, 1.0 molar equivalent) and BzCl (0.97 molar equivalent) were used.

[0339] Table 5 provides the NMR characterization of Ex13 and 14.

[0340] [Table 5]

[0341] Example 15 (CPrBz, Ds Pr = 1.54, Ds Bz =0.63) Ex15 was prepared by adapting the procedure for preparation of Ex3 with the exception of using Int 1. After complete dissolution of Int 1 (20 g, 1.0 molar equivalent), BzCl (1.87 g, 0.15 molar equivalent) in DMAC (2 mL) was added over 1 h at 26 °C and the RM was stirred at 26 °C for 1 h. Then, PrCl (3.95 g, 0.5 molar equivalent) in DMAC (3.7 mL) was added over 1 h at 26 °C and stirred for 1 h. Then, BzCl (6.09 g, 0.5 molar equivalent) in DMAC (5 mL) was added over 1 h at 26 °C and the RM was stirred for 14 h. The product was purified as described in the procedure for preparation of Ex3.

[0342] Example 16 (CPrBz, Ds Pr = 1.69, Ds Bz =0.63) Ex16 was prepared according to the procedure for the preparation of Ex15 (Ex3) except that after Int 1 (20 g, 1.0 mol equiv.) was completely dissolved, PrCl (4.5 g, 0.5 mol equiv.) in DMAC (5 mL) was added over 1 h at 26° C. and the RM was stirred for 1 h at 26° C. Then BzCl (8.44 g, 0.68 mol equiv.) in DMAC (9 mL) was added over 1 h at 26° C. and stirred for 14 h at 26° C. The title compound was isolated and purified according to the procedure for the preparation of Ex3.

[0343] Example 17 (CPrNp, Ds Pr = 1.68, Ds Np =0.46) Ex17 was prepared by adapting the procedure for preparation of Ex16 with the exception of using Int 3. After complete dissolution of Int 3 (20 g, 1 mol eq), PrCl (4.45 g, 0.55 mol eq) in DMAC (4.75 mL) was added over 1 h at 26° C. and the RM was stirred at 26° C. for 1 h. Then, NpCl (0.5 mol eq) in DMAC (8.6 mL) was added over 1 h at 26° C. and the RM was stirred at 26° C. for 14 h. The title compound was isolated and purified as described in the procedure for preparation of Ex3.

[0344] Example 24 (CPrBz, Ds Pr = 1.60, Ds Bz =0.92) Ex24 was prepared according to the procedure for preparing Ex15, with the exception that Int 3 was used. After Int 3 (20 g, 1.0 mol equiv.) was completely dissolved, PrCl (3.85 g, 0.45 mol equiv.) in DMAC (5 mL) was added over 1 h at 26° C. and the RM was stirred at 26° C. for 1 h. Then BzCl (10.72 g, 0.90 mol equiv.) in DMAC (9 mL) was added over 1 h at 26° C. and stirred at 26° C. for 14 h. The title compound was isolated and purified according to the procedure for preparing Ex3.

[0345] Table 6 provides the NMR characterization of Ex15-17 and Ex24, which was prepared by adapting the procedure described in this application.

[0346] [Table 6]

[0347] Example 18 (CPr2EHF, Ds Pr = 1.18, Ds 2EH = 0.36, Ds F =0.99) Int 3 (115 g, 1 molar equivalent) was added to a mixture of DMAC (931 g) and NMI (186 g) contained in a 4-neck resin kettle under nitrogen atmosphere and the RM was stirred at 32° C. for 4 h. The RM was cooled to 26° C. and 2-EHCl (31.93 g, 0.4 molar equivalent) was added slowly over 60 min and the RM was stirred at 26° C. for 2 h. Then FCl (71.65 g, 1.09 molar equivalent based on Int 3) in DMAC (85 g) was added slowly over 120 min and the RM was stirred at 26° C. for 12 h. The crude product was precipitated with MeOH (2 L) and the solid was then filtered and washed successively with deionized water for 5 h. The material was dried under vacuum at 55° C. overnight to give the title compound. 1 H NMR, 13 C NMR:DS Pr =1.18, DS 2EH =0.36, DS F =0.99;DS OH =0.51;C2DS=0.88;C3DS=0.65;C6DS=0.97.

[0348] Table 7 provides the NMR characterization of Ex18.

[0349] [Table 7]

[0350] Example 19 (CCrBz, DS Cr = 1.39, Ds Bz =1.33) The general procedure was described in application WO2019190756A1 (Preparation of Intermediate 1 and Example 1).

[0351] Step (1) Preparation of intermediate 11 (cellulose crotonate) 1ARY cellulose pulp (70 g, 1.0 equiv., 5 wt%) was added to a chilled (25° C.) jacketed reactor. A solution of TFAA (151 g, 1.67 molar equiv.) in trifluoroacetic acid (1180 g, 24 equiv.) was then added to the chilled cellulose solids with overhead stirring. After addition was complete, the RM was heated at 55° C. and stirred for 16 h, then cooled to room temperature. A solution of trans-crotonic acid (52.0 g, 1.4 molar equiv.), TFA (10 mL), and trifluoroacetic anhydride (154 g, 1.7 molar equiv.) was then prepared and stirred for 45 min. The resulting reagent mixture was added to the RM at room temperature, and the resulting RM was stirred for 8 h. The RM was treated with deionized water (1000 mL) to obtain a solid material that was filtered. The solids were suspended in iPrOH, stirred for 30 min, and the mixture was filtered. The resulting solid was suspended in aqueous KOAc (5 M, 2000 mL) and stirred for 36 h. The solid was collected by filtration, washed successively with deionized water for 8 h, and dried under vacuum (60° C., 12 h) to give the title intermediate. 1 H NMR, 13C NMR:DS Cr =1.39, DS OH =1.61, C2DS=0.61, C3DS=0.72, C6DS=0.05.

[0352] Step 2, Preparation of Example 19 (Crotonic Acid Benzoic Acid Cellulose) In an oven-dried 1000 mL jacketed 3-neck round-bottom flask (equipped with a mechanical stirrer), add Int 11 (20 g, 1.0 molar equivalent) followed by pyridine (150 mL) and dimethylacetamide (50 mL) to the jacketed round-bottom flask under N 2The RM was added under a nitrogen atmosphere using a solid addition funnel. The RM was heated to 50° C. and the mixture was stirred until the solids dissolved, then the RM was cooled to 25° C. BzCl (15.08 g, 1.4 equiv.) was then added over 2 min at 25° C. and the RM was stirred for 30 min and then at 50° C. overnight. Acetone (approximately 150 mL) was added to the RM followed by deionized water (2200 mL) to precipitate the crude product. The crude product was filtered and washed with a 1:1 solution of iPrOH:water (2×). The crude product was washed successively with deionized water for at least 5 h and the solids were collected by filtration and dried under vacuum (22.5 mm Hg, 60° C.) overnight. 1 H NMR, 13 C NMR:DS Cr =1.39, DS Bz =1.33, DS OH =0.29, C2DS=0.83, C3DS=0.89, C6DS=0.99.

[0353] Example 20 (CPrBz, Ds Pr = 1.81, Ds Bz =0.68) For Ex20, the synthetic procedure for Ex19 was applied, with the exception that in step 1 of the preparation of Int 12 (cellulose propionate benzoate), BzOH (0.5 molar equivalents), TF 2 0.8 molar equivalents), TFA (10 mL) were used after stirring together for 45 min, and the resulting reagent mixture was added to the reaction mixture and stirred for 3 h (at 45 °C) to prepare the RM. Then, propionic acid (0.8 molar equivalents), TFA (10 mL) were used after stirring together for 45 min. 2 O (0.8 molar equivalents) and TFA (10 mL) were stirred for 45 min, the resulting reagent solution was added to the RM, and the resulting RM was stirred for 5 h. Int 12 was obtained after using the workup described in step 1 of Ex19. After adding the first mixed anhydride and stirring for 3 h, the mixture was added to the reactor at 45° C. The reactants were allowed to stir for 5 h. 1 H NMR, 13 C NMR:DS Pr =0.81, DS Bz =0.52, DSOH =1.67, C2DS=0.64, C3DS=0.63, C6DS=0.05.

[0354] In step 2, Int 12 (1.0 molar equivalent) and BzCl (0.15 molar equivalent) were stirred at room temperature for 3 h, followed by propionic anhydride (1 molar equivalent) overnight at 50° C. The title product was isolated as described in step 2 of Ex19. 1 H NMR and 13 C NMR:DS Pr =1.81, DS Bz =0.68, DS OH =0.51, C2DS=0.86, C3DS=0.76, C6DS=0.87.

[0355] Table 8 provides the NMR characterization of Ex19-20.

[0356] [Table 8]

[0357] Example 21, Cellulose propionate pivalate naphthoate CPrPvNp(Ds Pr = 1.18, Ds Pv = 0.39, Ds Np =1.18) Ex21 was prepared as described in US20170306054 (Ex12, Table 3).

[0358] Example 22, Cellulose propionate 2-ethylhexanoate naphthoate CPr2EHNp(Ds Pr = 1.18, Ds 2EH = 0.40, Ds Np =1.26) Ex22 was prepared according to the procedure described in US Application No. 62 / 891561 (Ex7, Table 9).

[0359] Table 9 provides the NMR characterization of Ex21-22.

[0360] [Table 9]

[0361] Film Casting and Stretching Table 10 provides the general film composition with or without component A; the solvent system used to prepare the casting solution; the temperature used to stretch the cast film, if stretched; and the stretch ratio of the film. The stretch ratio is provided as either "x" or "c." "x" indicates that the film was stretched along the machine direction with two sides held and the other two sides free. "c" indicates that the film was stretched along the machine direction with all four sides held. "Ratio 1 x Ratio 2" indicates that the film was stretched or shrunk along the MD direction with ratio 1, while it was stretched or shrunk along the TD direction with ratio 2. For example, casting solutions made with cellulose ester Ex1 and with or without component A (0-20 wt%) were prepared in a 10% acetone in DCM solution.

[0362] For Films 18.1-18.4, Films 21.1-21.3, and Films 22.1-22.3, the corresponding resin and component A were dissolved in the corresponding solvent to prepare the corresponding solution A. A 1:9 EtOH / DCM solution of Eastman™ CAP482-20 (90 wt%) and TPP (10 wt%) with a solids content of 12 wt% was prepared. The CAP482-20 solution was cast on a glass substrate in a fume hood with relative humidity controlled at 45%-50%. The film was dried under a cover pan for 45 minutes to minimize the solvent evaporation rate, and then the pan was removed. The corresponding solution A was cast on the Eastman CAP482-20 film. The bilayer film was dried under a cover pan for 45 minutes to minimize the solvent evaporation rate, and then the pan was removed and dried for an additional 15 minutes after the pan was removed. The bilayer film was then peeled off the glass and annealed in a forced air oven at 100° C. for 10 minutes. After the 100° C. anneal, the film was annealed at a higher temperature (120° C.) for an additional 10 minutes. After the bilayer film was stretched, the top layer was peeled off and the bottom layer was measured.

[0363] Table 10 provides the corresponding solution components and stretching conditions for exemplary films. The percentage of Component A and plasticizer in the film is defined as follows: Percentage of Component A or Plasticizer = Weight of Component A or Plasticizer / Total Weight of (Cellulose ester, Component A, Plasticizer and any other non-solvent ingredients added).

[0364] The solution concentration is defined as follows: Solution concentration = total weight of (cellulose ester, component A, all other ingredients added except for plasticizer and solvent) / total weight of (cellulose ester, component A, plasticizer, all other non-solvent ingredients added, and solvent).

[0365] For example, for film 1.3, Resin 1 (8 g, 95 wt%) and Component A (0.421 g, 5 wt%) were added to 1:9 acetone / DCM (75.8 g, solution concentration 10 wt%). The mixture was placed on a roller until Resin 1 and Component A were completely dissolved.

[0366] For example, for film 25.2, Ex25 (15 g, 88 wt%), component A (1.19 g, 7 wt%) and plasticizer Admex523 (0.85 g, 5 wt%) were added to 5:95 MeOH / DCM (104.7 g, solution concentration 14 wt%). The mixture was placed on a roller until Resin 1, component A and the plasticizer were completely dissolved.

[0367] [Table 10-1]

[0368] [Table 10-2]

[0369] [Table 10-3]

[0370] [Table 10-4]

[0371] As shown in Table 11, the film samples of the present invention exhibited improved wavelength dispersion while having negative birefringence or retardation, as compared to the corresponding control film samples having negative birefringence or retardation. For example, Film 1.1 and Film 1.2 (control samples) had R values ​​of 1.13 to 1.15. e (450nm) / R e (550 nm) and R of 0.93 to 0.94 e (650nm) / R e(550 nm). Films 1.3 to 1.14 and films 1.18 to 1.19 have R e (450nm) / R e (550 nm) and R of 0.95 to 1.02 e (650nm) / R e (550 nm), and films 1.3, 1.11, and 1.13 have an R of 0.91 to 0.93. e (450nm) / R e (550 nm) and R of 0.98 e (650nm) / R e (550 nm). Films 1.5 and 1.6 have an R of 0.69 to 0.78. e (450nm) / R e (550 nm) and R of 1.01 to 1.02 e (650nm) / R e (550 nm) and showed a further tailored wavelength dispersion.

[0372] As shown in Table 11, the film samples of the present invention exhibit improved wavelength dispersion and have Nz coefficients of -3.0 to 3.0. Specifically, films 1.5, 1.7, 1.10, 1.11, 2.6, 3.3, 3.5, 4.5, 4.6, 4.7, 5.4, 7.4, 8.3, 8.4, 9.1, 9.2, 10.1, 10.2, 12.4, 12.5, 15.3, 16.3, 17.7, 24.1 and 25.1 have Nz coefficients of 0.2 to 0.8, which can be used as Z films. The film samples of the present invention have an R of less than 1.02. e (450nm) / R e (550nm), R of 0.95 or more e (650nm) / R e (550nm), R of -6.0~-0.5 e(589 nm) / d(nm) ratio multiplied by 1000 and have improved wavelength dispersion. More specifically, films 1.7, 2.6, 3.3, 3.5, 4.6, 4.7, 5.4, 7.4, 8.3, 8.4, 9.1, 10.1, 10.2, 12.4, 12.5, 15.3, 16.3, 17.7 and 25.1 have improved Nz coefficients of 0.3 to 0.7. Even more specifically, films 1.7, 3.5, 8.3, 8.4, 15.3 and 25.1 have further improved Nz coefficients of 0.4 to 0.6. Even more specifically, films 15.3, 16.3 and 17.7 have Nz coefficients of 0.3 to 0.7 and have R of 0.90 or less. e (450nm) / R e (550nm), R of 0.99 or higher e (650nm) / R e (550nm), R of -6.0~-0.5 e It has a further improved chromatic dispersion having a ratio of (589 nm) / d(nm) multiplied by 1000.

[0373] Films 1.3, 1.19, 2.5, 3.4, 5.3, 6.3, 7.5, 9.3, 10.3, 11.1, 11.3, 11.4, 13.4, 17.6, 18.4, 19.4, 19.6, 20.3 have Nz coefficients between 0.8 and 1.2, which can be used as -A films. This film sample has an R of 1.05 or less. e (450nm) / R e (550nm), R of 0.95 or more e (650nm) / R e (550nm), R of -6.0~-0.5 e Improved wavelength dispersion with a ratio of (589 nm) / d(nm) multiplied by 1000. More specifically, films 1.3, 6.3, 7.5, 11.1 and 17.6 have an R of 0.95 or less. e (450nm) / R e (550nm), R of 0.97 or higher e (650nm) / R e (550 nm), which has further improved chromatic dispersion.

[0374] Table 11 also shows that the examples (Films 21.1-22.3) do not have improved wavelength dispersion compared to the control sample. Table 11 provides additional data for the films prepared. Film thickness after stretching, R measured at 589 nm e , R measured at 589 nm th , R e (450nm) / R e (550 nm), N z Coefficient, R e / d, R th / d is provided.

[0375] [Table 11-1]

[0376] [Table 11-2]

[0377] Plasticizers were incorporated into the films as shown in Table 12. For the films in Table 12, Nz coefficients of 0.3 to 0.7 are obtained. More specifically, the Re(450nm / 550nm) values ​​of the exemplary films are less than or equal to 1.0, and R e The ratio of (589 nm) / d (nm) multiplied by 1000 is -6.0 to -0.5.

[0378] [Table 12]

[0379] Preparation of film 1.20 Ex1 (16 g) and Tinuvin 1577 (0.842 g) were added to 123 g of dichloromethane:methanol = 95:5 (wt:wt). Tinuvin 1577 was calculated as 5 wt% in the film while Ex1 is 95 wt% in the film. The mixture was placed on a roller until Ex1 and Tinuvin 1577 were completely dissolved. The above prepared solution was cast on a glass plate using a doctor blade to obtain a film of the desired thickness. Casting was performed in a fume hood with relative humidity controlled at 45%-50%. After casting, the film was dried under a cover pan for 120 min to minimize the rate of solvent evaporation before removing the pan. The film was dried for 30 min, then the film was peeled off the glass and annealed at 100 °C for 10 min in a forced air oven. After annealing at 100°C, the films were annealed at a higher temperature (120°C) for an additional 10 min.

[0380] The film is cut into a square or rectangular shape and stretched under the conditions shown in Table 13. Preparation of Films 26.1 to 28.1 in Tables 13 and 14 Films 26.1-28.1 were prepared following the procedure for preparing Film 1.20, with the exception that different Component A and plasticizers were used as shown in Table 13.

[0381] As shown in Tables 13 and 14, exemplary films comprised of regioselective cellulose esters with or without plasticizer and component A were stretched at 100-220° C. and had thicknesses ("d") (microns) of 10 μm to 200 μm, R of -120 nm to -350 nm. e (589nm), R of -100nm to 100nm th (589 nm), Nz factors of 0.2–0.8, and the films have R e (450 / 550), and the film has an R of 0.9 to 1.25. e (650 / 550).

[0382] More specifically, films 1.20, 26.2, 26.3, 26.4, 26.5, 26.6, 26.7, 26.8, 26.9, 26.10, 26.11, 26.12, 26.13, 26.14, 27.1, 27.2, 27.3, 27.4, 27.5, 27.6 and 28.1 were stretched at Tg-30°C to Tg+50°C and had R of -120nm to -350nm. e (589nm), R of -100nm to 100nm th (589 nm), Nz factors of 0.3–0.7, and the films have R e (450 / 550), and the film has an R of 0.9 to 1.25. e (650 / 550).

[0383] [Table 13-1]

[0384] [Table 13-2]

[0385] [Table 14]

Claims

1. （１） (i)A plurality of aromatic-CO-substituents, (ii) a plurality of first unsaturated or saturated (C １～６ ) alkyl-CO-substituents, and (iii)A plurality of hydroxyl substituents A cellulose ester selectively substituted to contain where: Degree of substitution of hydroxyl group (“DS ＯＨ ”) is 0.2 to 1.1, and The cellulose ester has a C2 substitution degree of aromatic -CO- substituents of 0.15 to 0.8 (the "C2DS" ＡｒＣＯ "), and The cellulose ester has a C3 substitution degree of aromatic -CO- substituents of 0.05 to 0.6 (the "C3DS" ＡｒＣＯ "), and The cellulose ester has a C6 substitution degree of aromatic -CO- substituents of 0.05 to 0.6 (the "C6DS" ＡｒＣＯ "), and Degree of total substitution of the aromatic -CO- substituent ("total DS" ＡｒＣＯ ") is from 0.25 to 2.0, and Aromatic-CO- is (i) (C ６～２０ ) aryl-CO- [wherein aryl is unsubstituted or substituted by 1 to 5 R １ ] or (ii) heteroaryl-CO- [wherein heteroaryl is a 5- to 10-membered ring having 1 to 4 heteroatoms selected from N, O, or S, and heteroaryl is unsubstituted or substituted by 1 to 5 R １ s] A selectively substituted cellulose ester, （２） 【Chemical 1】 [wherein: Ring A is (C ６～２０ ) aryl or a 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O, or S; Ring B is (C ６～２０ ) an aryl or a 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O or S; Ring C is (C ６～２０ ) an aryl or a 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O or S; Each R １ is, independently, saturated or unsaturated (C １～２０ )alkyl; saturated or unsaturated halo(C １～２０ )alkyl; saturated or unsaturated (C １～２０ )alkoxy; saturated or unsaturated halo(C １～２０ )alkoxy; unsubstituted or substituted by 1 to 5 alkyl, haloalkyl, alkoxy, haloalkoxy, halo (C ６～２０ )aryl; 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O or S; or -CH ２ C(O)-R ３ ; and R ２ is, independently, hydrogen, saturated or unsaturated (C １～２０ ), alkyl, or saturated or unsaturated halo(C １～２０ ), alkyl; Each R ３ is, independently, saturated or unsaturated (C １～２０ ), alkyl, saturated or unsaturated halo(C １～２０ ), alkyl, (C ６～２０ ), aryl, or 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O, or S, where the aryl or heteroaryl is unsubstituted or substituted by 1 to 5 R ６ ; Each R ４ is, independently, saturated or unsaturated (C １～２０ ), alkyl, saturated or unsaturated halo(C １～２０ ), alkyl, saturated or unsaturated hetero(C １～２０ ), alkyl containing 1 to 2 heteroatoms selected from N, O or S, saturated or unsaturated (C １～２０ ), alkyl-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy, saturated or unsaturated halo(C １～２０ ), alkoxy, saturated or unsaturated hydroxy(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkyl-CO, saturated or unsaturated (C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, (C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, unsubstituted or substituted by 1 to 5 R ６ ), aryl, (C ６～２０ ), or unsubstituted or substituted by 1 to 4 heteroatoms selected from N, O or S, 5- to 10-membered heteroaryl substituted by 1 to 5 R ６ ), where each group is unsubstituted or substituted by 1 to 3 hydroxyls, saturated or unsaturated (C １～２０ ), alkyl, saturated or unsaturated halo(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy, saturated or unsaturated hydroxy(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkyl, or saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkyl-, saturated or unsaturated(C １～２０ ), alkyl-CO, saturated or unsaturated(C １～２０ ), alkyl-COO, saturated or unsaturated(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl,(C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, unsubstituted or substituted(C ６～２０ ), aryl, or unsubstituted or substituted by 5-10 membered heteroaryl containing 1-4 heteroatoms selected from N, O or S; Each R ６ is, independently, hydroxy, cyano, saturated or unsaturated (C １～２０ ), alkyl, saturated or unsaturated halo(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy, saturated or unsaturated halo(C １～２０ ), alkoxy, halo, (C ６～２０ ), aryl, 5- to 10-membered heteroaryl containing 1 to 4 heteroatoms selected from N, O or S, saturated or unsaturated hydroxy(C １～２０ ), alkyl, or saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkyl-CO, saturated or unsaturated (C １～２０ ), alkyl-COO, saturated or unsaturated (C １～２０ ), alkyl-O-CO, saturated or unsaturated (C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, or (C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, where each group is unsubstituted or substituted by 1 to 5 R ７ ; Each R ７ is, independently, hydroxy, cyano, saturated or unsaturated (C １～２０ ), alkyl, saturated or unsaturated halo(C １～２０ ), alkyl, or saturated or unsaturated (C １～２０ ), alkoxy, saturated or unsaturated hydroxy(C １～２０ ), alkyl, saturated or unsaturated hydroxy(C １～２０ ), alkoxy, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkoxy, saturated or unsaturated (C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkoxy, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkoxy, saturated or unsaturated (C １～２０ ), alkyl-CO, saturated or unsaturated (C １～２０ ), alkyl-COO, saturated or unsaturated (C １～２０ ), alkyl-O-CO, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO, saturated or unsaturated (C １～２０ ), alkyl-COO, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO, saturated or unsaturated (C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ ), alkyl-O-CO-(C １～２０ ), alkoxy, saturated or unsaturated (C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, saturated or unsaturated (C １～２０ -COO-(C １～２０ -alkoxy, saturated or unsaturated (C １～２０ -alkoxy-(C １～２０ -COO-(C １～２０ -alkyl, saturated or unsaturated (C １～２０ -alkoxy-(C １～２０ -COO-(C １～２０ -alkoxy, saturated or unsaturated (C １～２０ -alkoxy-(C １～２０ -alkyl-O-CO-(C １～２０ -alkyl, saturated or unsaturated (C １～２０ -alkoxy-(C １～２０ -alkyl-O-CO-(C １～２０ -alkoxy; Each R ９ is, independently, R ４ -O-, hydroxy, cyano, saturated or unsaturated (C １～２０ ), containing 1 to 2 heteroatoms selected from N, O or S, saturated or unsaturated hetero (C １～２０ ), saturated or unsaturated halo (C １～２０ ), saturated or unsaturated (C １～２０ ), alkyl-CO-(C １～２０ ), saturated or unsaturated (C １～２０ ), alkyl-COO-(C １～２０ ), saturated or unsaturated (C １～２０ ), alkyl-O-CO-(C １～２０ ), saturated or unsaturated (C １～２０ ), alkyl-COO, saturated or unsaturated (C １～２０ ), alkyl-O-CO, saturated or unsaturated (C １～２０ ), alkyl-CO, saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-O-(C １～２０ ), saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), saturated or unsaturated (C １～２０ ), alkoxy-(C １～２０ ), alkyl-COO-(C １～２０ ), (C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), unsubstituted or substituted by 1 to 5 R ６ ), (C ６～１０ ), aryl, unsubstituted or substituted by 1 to 5 R ６ ), containing 1 to 4 heteroatoms selected from N, O or S, 5- to 10-membered heteroaryl, where each group is unsubstituted or substituted by 1 to 3 hydroxy, saturated or unsaturated (C １～２０ ), saturated or unsaturated halo (C １～２０ ), saturated or unsaturated (C １～２０ ), alkoxy, or saturated or unsaturated halo(C １～２０ ), alkoxy, saturated or unsaturated hydroxy(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-hydroxy(C １～２０ ), alkyl, or saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl-CO-(C １～２０ ), alkyl-, saturated or unsaturated(C １～２０ ), alkyl-CO, saturated or unsaturated(C １～２０ ), alkyl-COO, saturated or unsaturated(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, saturated or unsaturated(C １～２０ ), alkoxy-(C １～２０ ), alkyl-COO-(C １～２０ ), alkyl, or(C １～２０ ), alkoxy-(C １～２０ ), alkyl-O-CO-(C １～２０ ), alkyl, unsubstituted or substituted(C ６～２０ ), aryl, or unsubstituted or substituted, N, O or S selected from 1 to 4 heteroatoms-containing 5 to 10 membered heteroaryl; Each n is independently 0, 1, 2, 3, 4 or 5; Each m is independently 0, 1, 2, 3, 4 or 5; k is independently 0, 1, 2, 3 or 4] Component A, A film containing where: Component A is present at less than 30 wt% based on the total weight of the film, The film exhibits an R of -100 nm to -350 nm ｅ for (589 nm), The film exhibits an R of -100 nm to 100 nm ｔｈ (589 nm), The film has an R of 0.7 to 1.20 ｅ (450 nm) / R ｅ showing a ratio of (550 nm), The film has an R of 0.9 to 1.25 ｅ (650 nm) / R ｅ showing a ratio of (550 nm), The film has [[-R ｔｈ (589 nm) / R ｅ (589 nm)] + 0.5] (「N ｚ 」), and Each R ｔｈ (589 nm) is the out-of-plane retardation measured at 589 nm, Each R ｅ (589 nm), R ｅ (450 nm), R ｅ (550 nm) are the in-plane retardations measured at 589 nm, 450 nm, and 550 nm, respectively, The film is stretched, Film.

2. The film is stretched at a temperature of 100°C to 220°C or T ｇ - 30°C to T ｇ + 50°C, where T ｇ is the glass transition temperature of the film, the film according to claim 1.

3. R ｅ (589 nm) is from -120 to -320 nm, and R ｔｈ (589 nm) is from -60 to 60 nm, the film according to claim 1.

4. R ｅ R at (450 nm) / ｅ The ratio of (550 nm) is 0.75 to 1.05, where R ｅ R at (450 nm) is the in-plane retardation measured at 450 nm, and R ｅ R at (550 nm) is the in-plane retardation measured at 550 nm. The film according to claim 1.

5. R ｅ (450 nm) / R ｅ The film according to claim 4, wherein the ratio of (550 nm) is 0.75 to 0.

85.

6. Component A is ​ The film according to claim 1.

7. Component A is 1,3-diphenyl-1,3-propanedione, avobenzone, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(hexyloxy)phenol, 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-[2-hydroxy-3-(dodecyloxy and tridecyloxy)propoxy]phenol, isooctyl 2-(4-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-3-hydroxyphenoxy)propanoate, 6,6'-(6-(2,4-dibutoxyphenyl)-1,3,5-triazine-2,4-diyl)bis(3-butoxyphenol), 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol, 2-(4,6-di([1,1'-biphenyl]-4-yl)-1,3,5-triazin-2-yl)-5-((2-ethylhexyl)oxy)phenol, or a combination thereof. The film according to claim 1.

8. The aromatic -CO- is (C ６～２０ ) aryl -CO-, where the aryl is unsubstituted or substituted by 1 to 5 R １ The film according to claim 1, which is substituted by

9. The film according to claim 8, wherein the aromatic -CO- is unsubstituted or substituted by 1 to 5 Rs, and is benzoyl or naphthoyl. １ and is benzoyl or naphthoyl which is unsubstituted or substituted by 1 to 5 Rs.

10. The film according to claim 9, wherein the aromatic - CO - is unsubstituted or substituted by 1 to 5 Rs １ and is benzoyl

11. The cellulose ester has a total DS of 0.50 to 1.60 ＡｒＣＯ The film according to claim 10, having the same

12. C2DS ＡｒＣＯ and C3DS ＡｒＣＯ The film according to claim 11, wherein the total of the above is 0.30 to 1.

25.

13. The film according to claim 12, wherein the aromatic-CO- is unsubstituted or naphthoyl substituted by 1 to 5 Rs １ s.

14. The cellulose ester has an overall DS of 0.3 to 0.8 ＡｒＣＯ The film according to claim 13, having the same.

15. C2DS ＡｒＣＯ and C3DS ＡｒＣＯ The film according to claim 14, wherein the total of the above is 0.2 to 0.

6.

16. The cellulose ester further comprises a plurality of second (C １～２０ ) alkyl-CO-substituents, the film according to claim 1.

17. The film further contains one or more plasticizers, wherein the one or more plasticizers are phosphate plasticizers, phthalate plasticizers, mono- or dibenzoic acid plasticizers, sugar ester plasticizers, glycol ester plasticizers, polyester plasticizers, cellulose ester plasticizers, or combinations thereof. The film according to claim 1.

18. The film further contains one or more plasticizers, wherein the one or more plasticizers are plasticizers having one or more aromatic groups. The film according to claim 1.

19. The film is stretched along the longitudinal direction ("MD"), shrunk along the MD, stretched along the transverse direction ("TD"), shrunk along the TD, or a combination thereof. The film according to claim 1.

20. The slow axis in the film plane forms an angle of 0° to 180° with respect to the MD of the film. The film according to any one of claims 1 to 19.

Images