TW202102557A - Polymer composition and single-layer retardation material - Google Patents

Abstract

The present invention provides a polymer composition which contains: (A) a side-chain polymer that has a side chain having a photoreactive moiety represented by formula (a) and a side chain having a moiety represented by formula (b); and (B) an organic solvent.

Description

Polymer composition and single-layer retardation material

The present invention relates to a polymer-containing composition and a single-layer retardation material. In detail, it relates to materials with ideal optical properties for applications such as display devices and recording materials, and in particular, it relates to liquid crystal polymers that can be ideally used in optical compensation films such as polarizers and retardation plates for liquid crystal displays. The composition of the polymer and the single-layer retardation material obtained from the composition.

Due to the requirements for improvement of display quality and weight reduction of liquid crystal display devices, for optical compensation films such as polarizers and retardation plates, the requirements for polymer films whose internal molecular alignment structure is controlled have increased. In order to meet the requirements, the development of films that utilize the optical anisotropy possessed by polymerizable liquid crystal compounds is underway. The polymerizable liquid crystal compound used here is generally a liquid crystal compound having a polymerizable group and a liquid crystal structure portion (a structure portion having a spacer portion and a mesogen portion), and an acrylic group is widely used as the polymerizable group.

Such a polymerizable liquid crystal compound is generally formed into a polymer (film) by a method of irradiating radiation such as ultraviolet rays to perform polymerization. For example, there is known a method for obtaining a polymer by supporting a specific polymerizable liquid crystal compound having an acrylic group between supports, maintaining the compound in a liquid crystal state while irradiating radiation to obtain a polymer (Patent Document 1), or using a photopolymerization initiator A method of adding to a mixture of two polymerizable liquid crystal compounds having an acrylic group or a composition obtained by mixing an asymmetric liquid crystal in the mixture, and irradiating ultraviolet rays to obtain a polymer (Patent Document 2).

In addition, there have been reports of alignment films using polymerizable liquid crystal compounds or polymers that do not require liquid crystal alignment films (Patent Documents 3 and 4), and alignment films using polymers containing photo-crosslinked sites (Patent Documents 5 and 6). ) And other single-layer coating type alignment films. However, the above-mentioned film production process is difficult, and it is necessary to use solvents with excellent solubility such as NMP, chloroform, and chlorobenzene as the solvent of the polymer used. The solubility of the polymer is low, and so far, no solution has been found to solve this problem. The material of the question. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 62-70407 [Patent Document 2] Japanese Patent Application Laid-Open No. 9-208957 [Patent Document 3] European Patent Application Publication No. 1090325 Specification [Patent Document 4] International Publication No. 2008/031243 [Patent Document 5] JP 2008-164925 A [Patent Document 6] Japanese Patent Laid-Open No. 11-189665

[The problem to be solved by the invention]

The present invention is made in view of the above problems, and its object is to provide a novel polymer, a composition containing the polymer, and a composition derived from the single-layer retardation material that can be produced by a simpler process. The single-layer phase difference material. [Means to solve the problem]

In order to solve the above-mentioned problems, the inventors of the present case have conducted in-depth investigations and found that by using a composition containing a specific polymer and specific additives, a liquid crystal alignment film can be used without the use of a liquid crystal alignment film to obtain a monomer with high refractive index anisotropy (Δn). The layer retardation material can also produce a single-layer retardation material with high retardation value and no turbidity, and even complete the present invention.

式中，R¹ 為碳數1~30之伸烷基，且該伸烷基中之1個或多個氫原子也可被取代為氟原子或有機基。又，R¹ 中之-CH₂ CH₂ -也可被取代為-CH=CH-，R¹ 中之-CH₂ -也可被取代為選自於由-O-、-NH-C(=O)-、-C(=O)-NH-、-C(=O)-O-、-O-C(=O)-、-NH-、-NH-C(=O)-NH-及-C(=O)-構成之群組中之基。惟，相鄰的-CH₂ -不會同時取代為這些基。又，-CH₂ -也可為R¹ 中之末端的-CH₂ -。 R² 為2價芳香族基、2價脂環族基、2價雜環族基或2價縮合環族基。 R³ 為單鍵、-O-、-C(=O)-O-、-O-C(=O)-或-CH=CH-C(=O)-O-。 R⁴ 為1,4-伸苯基或反式-1,4-伸環己基。 R為碳數1~6之烷基、碳數1~6之鹵烷基、碳數1~6之烷氧基、碳數1~6之鹵烷氧基、氰基或硝基，且c≧2時，各個R可互為相同，也可相異。 式(b)中的苯環也可經選自於碳數1~6之烷基、碳數1~6之鹵烷基、碳數1~6之烷氧基、碳數1~6之鹵烷氧基、氰基及硝基中之取代基取代。 a為0、1或2。 b為0或1。 c為符合0≦c≦2b+4之整數。 破折線為原子鍵。 2. 如1.之聚合物組成物，其中，上述具有光反應性部位之側鏈為下式(a1)表示者。 [化2]

式中，R¹ 、R² 及a同上所述。 R^3A 為單鍵、-O-、-C(=O)-O-或-O-C(=O)-。 式(a1)中的苯環也可經選自於碳數1~6之烷基、碳數1~6之鹵烷基、碳數1~6之烷氧基、碳數1~6之鹵烷氧基、氰基及硝基中之取代基取代。 破折線為原子鍵。 3. 如1.或2.之聚合物組成物，其中，(A)側鏈型聚合物更具有僅展現液晶性之側鏈。 4. 如3.之聚合物組成物，其中，上述僅展現液晶性之側鏈為下式(1)~(12)中之任一者表示之液晶性側鏈。 [化3]

[化4]

式中，A¹ 、A² 分別獨立地為單鍵、-O-、-CH₂ -、-C(=O)-O-、-O-C(=O)-、-C(=O)-NH-、-NH-C(=O)-、-CH=CH-C(=O)-O-或-O-C(=O)-CH=CH-。 R¹¹ 為-NO₂ 、-CN、鹵素原子、苯基、萘基、聯苯基、呋喃基、1價含氮雜環基、碳數5~8之1價脂環族烴基、碳數1~12之烷基或碳數1~12之烷氧基。 R¹² 為選自於由苯基、萘基、聯苯基、呋喃基、1價含氮雜環基、碳數5~8之1價脂環族烴基、及它們所組合而得的基構成之群組中之基，且鍵結於這些基的氫原子也可被取代為-NO₂ 、-CN、鹵素原子、碳數1~5之烷基或碳數1~5之烷氧基。 R¹³ 為氫原子、-NO₂ 、-CN、-CH=C(CN)₂ 、-CH=CH-CN、鹵素原子、苯基、萘基、聯苯基、呋喃基、1價含氮雜環基、碳數5~8之1價脂環族烴基、碳數1~12之烷基或碳數1~12之烷氧基。 E為-C(=O)-O-或-O-C(=O)-。 d為1~12之整數。 k1~k5分別獨立地為0~2之整數，惟，k1~k5之合計為2以上。 k6及k7分別獨立地為0~2之整數，惟，k6及k7之合計為1以上。 m1、m2及m3分別獨立地為1~3之整數。 n為0或1。 Z¹ 及Z² 分別獨立地為單鍵、-C(=O)-、-CH₂ O-、-CH=N-或-CF₂ -。 破折線為原子鍵。 5. 如4.之聚合物組成物，其中，上述僅展現液晶性之側鏈為式(1)~(11)中之任一者表示之液晶性側鏈。 6. 一種單層相位差材之製造方法，包含下列步驟： (I)將如1.~5.中任一項之聚合物組成物塗佈於基板上來形成塗膜， (II)對上述塗膜照射經偏光之紫外線，及 (III)將上述已照射紫外線之塗膜進行加熱來獲得相位差材。 7. 一種單層相位差材，得自於如1.~5.中任一項之聚合物組成物。 [發明之效果]Therefore, the present invention provides the following polymer composition and single-layer retardation material. 1. A polymer composition comprising: (A) a side chain type polymer having a side chain having a photoreactive site represented by the following formula (a) and a side chain having a site represented by the following formula (b), and (B) Organic solvents. [化1]

In the formula, R ¹ is an alkylene group having 1 to 30 carbon atoms, and one or more hydrogen atoms in the alkylene group may be substituted with a fluorine atom or an organic group. In addition, -CH ₂ CH ₂ ^{-in R 1} can also be substituted with -CH=CH-, and -CH ₂ ^{-in R 1} can also be substituted with selected from -O-, -NH-C(= O)-, -C(=O)-NH-, -C(=O)-O-, -OC(=O)-, -NH-, -NH-C(=O)-NH- and -C (=O)-The base of the group formed. However, adjacent -CH ₂ -will not be substituted with these groups at the same time. And, -CH ₂ - may ^be, R ¹ is -CH end of the ₂ -. R ² is a divalent aromatic group, a divalent alicyclic group, a divalent heterocyclic group, or a divalent condensed cyclic group. R ³ is a single bond, -O-, -C(=O)-O-, -OC(=O)- or -CH=CH-C(=O)-O-. R ⁴ is 1,4-phenylene or trans-1,4-cyclohexylene. R is alkyl with 1 to 6 carbons, haloalkyl with 1 to 6 carbons, alkoxy with 1 to 6 carbons, haloalkoxy with 1 to 6 carbons, cyano or nitro, and c When ≧2, each R can be the same or different from each other. The benzene ring in formula (b) can also be selected from alkyl groups with 1 to 6 carbons, haloalkyl groups with 1 to 6 carbons, alkoxy groups with 1 to 6 carbons, and halogens with 1 to 6 carbons. Substituents in alkoxy, cyano and nitro are substituted. a is 0, 1, or 2. b is 0 or 1. c is an integer conforming to 0≦c≦2b+4. The dashed line is the atomic bond. 2. The polymer composition according to 1., wherein the side chain having the photoreactive site is represented by the following formula (a1). [化2]

In the formula, R ¹ , R ² and a are the same as described above. R ^3A is a single bond, -O-, -C(=O)-O- or -OC(=O)-. The benzene ring in formula (a1) can also be selected from alkyl groups with 1 to 6 carbons, haloalkyl groups with 1 to 6 carbons, alkoxy groups with 1 to 6 carbons, and halogens with 1 to 6 carbons. Substituents in alkoxy, cyano and nitro are substituted. The dashed line is the atomic bond. 3. The polymer composition of 1. or 2., wherein the (A) side chain type polymer further has side chains that only exhibit liquid crystallinity. 4. The polymer composition of 3., wherein the side chain that only exhibits liquid crystallinity is a liquid crystal side chain represented by any one of the following formulas (1) to (12). [化3]

[化4]

In the formula, A ¹ and A ² are each independently a single bond, -O-, -CH ₂ -, -C(=O)-O-, -OC(=O)-, -C(=O)-NH -, -NH-C(=O)-, -CH=CH-C(=O)-O- or -OC(=O)-CH=CH-. R ¹¹ is -NO ₂ , -CN, halogen atom, phenyl, naphthyl, biphenyl, furyl, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group with 5 to 8 carbon atoms, carbon number 1 ~12 alkyl group or alkoxy group with carbon number 1-12. R ¹² is selected from the group consisting of a phenyl group, a naphthyl group, a biphenyl group, a furyl group, a monovalent nitrogen-containing heterocyclic group, a monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and a combination thereof The groups in the group, and the hydrogen atoms bonded to these groups can also be substituted with -NO ₂ , -CN, halogen atoms, alkyl groups with 1 to 5 carbons, or alkoxy groups with 1 to 5 carbons. R ¹³ is a hydrogen atom, -NO ₂ , -CN, -CH=C(CN) ₂ , -CH=CH-CN, halogen atom, phenyl, naphthyl, biphenyl, furanyl, monovalent nitrogen-containing hetero Cyclic group, monovalent alicyclic hydrocarbon group with carbon number 5-8, alkyl group with carbon number 1-12 or alkoxy group with carbon number 1-12. E is -C(=O)-O- or -OC(=O)-. d is an integer of 1-12. k1~k5 are each independently an integer of 0~2, but the total of k1~k5 is 2 or more. k6 and k7 are each independently an integer of 0-2, but the total of k6 and k7 is 1 or more. m1, m2, and m3 are each independently an integer of 1 to 3. n is 0 or 1. Z ¹ and Z ² are each independently a single bond, -C(=O)-, -CH ₂ O-, -CH=N- or -CF ₂ -. The dashed line is the atomic bond. 5. The polymer composition of 4., wherein the side chain that only exhibits liquid crystallinity is a liquid crystal side chain represented by any one of formulas (1) to (11). 6. A manufacturing method of a single-layer retardation material, comprising the following steps: (I) coating the polymer composition of any one of 1. to 5. on a substrate to form a coating film, (II) coating the above The film is irradiated with polarized ultraviolet rays, and (III) the above-mentioned coating film irradiated with ultraviolet rays is heated to obtain a retardation material. 7. A single-layer retardation material, obtained from the polymer composition of any one of 1.~5. [Effects of Invention]

According to the present invention, it is possible to provide a single-layer retardation material having a high retardation value even if it is a film, and a polymer for producing the single-layer retardation material.

The inventors of this case obtained the following insights as a result of in-depth research, and even completed the present invention. The polymer composition of the present invention has a photosensitive side chain type polymer (hereinafter also referred to as a side chain type polymer) that can exhibit liquid crystallinity, and the coating film obtained by using the above polymer composition is a photosensitive side chain polymer that can exhibit liquid crystallinity. Side chain polymer film. The coating film is not subjected to rubbing treatment, but is irradiated with polarized light to perform alignment treatment. Then, after irradiating with polarized light, the side chain type polymer film undergoes a step of heating, and it becomes a film to which optical anisotropy is imparted (hereinafter also referred to as a single-layer retardation material). At this time, the slight anisotropy exhibited by the irradiation of polarized light becomes the driving force, and the liquid crystalline side chain polymer itself is self-organized and realigned efficiently. As a result, it is possible to realize highly efficient alignment processing for the single-layer retardation material, and obtain a single-layer retardation material imparted with high optical anisotropy.

In addition, in the polymer composition of the present invention, the component (A), which is a side chain type polymer, includes the side chain having the photo-alignment site represented by the above formula (a) and the side chain represented by the above formula (b) at the same time. Side chain, and will inhibit the aggregation of the polymer. Thereby, the retardation material obtained from the polymer composition of the present invention can express high retardation even if it is a film. In addition, they are those who include the inventor's insights about the mechanism of the present invention, and are not intended to limit the present invention.

Hereinafter, the embodiments of the present invention will be described in detail.

[Polymer composition] The polymer composition of the present invention is characterized by containing: (A) A photosensitive side chain type polymer that exhibits liquid crystallinity in a predetermined temperature range, and (B) Organic solvents.

[(A) Side chain polymer] The component (A) is a photosensitive side chain polymer that exhibits liquid crystallinity in a predetermined temperature range, and has a side having a photoreactive site represented by the following formula (a) A side chain type polymer having a chain (hereinafter also referred to as side chain a) and a side chain (hereinafter also referred to as side chain b) at the position represented by the following formula (b). [化5]

In formula (a), R ¹ is an alkylene group having 1 to 30 carbon atoms, and one or more hydrogen atoms in the alkylene group may be substituted with a fluorine atom or an organic group. In addition, -CH ₂ CH ₂ ^{-in R 1} can also be substituted with -CH=CH-, and -CH ₂ ^{-in R 1} can also be substituted with selected from -O-, -NH-C(= O)-, -C(=O)-NH-, -C(=O)-O-, -OC(=O)-, -NH-, -NH-C(=O)-NH- and -C (=O)-The base of the group formed. However, adjacent -CH ₂ -will not be substituted with these groups at the same time. And, -CH ₂ - may ^be, R ¹ is -CH end of the ₂ -. R ² is a divalent aromatic group, a divalent alicyclic group, a divalent heterocyclic group, or a divalent condensed cyclic group. R ³ is a single bond, -O-, -C(=O)-O-, -OC(=O)- or -CH=CH-C(=O)-O-. R is alkyl with 1 to 6 carbons, haloalkyl with 1 to 6 carbons, alkoxy with 1 to 6 carbons, haloalkoxy with 1 to 6 carbons, cyano or nitro, and c When ≧2, each R can be the same or different from each other. a is 0, 1, or 2. b is 0 or 1. c is an integer conforming to 0≦c≦2b+4. The dashed line is the atomic bond.

In the formula (b), R ¹ , R ² , R ³ and a are the same as described above. R ⁴ is 1,4-phenylene or trans-1,4-cyclohexylene. The benzene ring in formula (b) can also be selected from alkyl groups with 1 to 6 carbons, haloalkyl groups with 1 to 6 carbons, alkoxy groups with 1 to 6 carbons, and halogens with 1 to 6 carbons. Substituents in alkoxy, cyano and nitro are substituted. The dashed line is the atomic bond.

The alkylene having 1 to 30 carbon atoms represented by R ^{1 may} be linear, branched, or cyclic. Specific examples include: methylene, ethylene, and propane-1,3- Diyl, butane-1,4-diyl, pentane-1,5-diyl, hexane-1,6-diyl, heptane-1,7-diyl, octane-1,8- Diyl, nonane-1,9-diyl, decane-1,10-diyl, etc.

Examples of the divalent aromatic group represented by R ^{2 include phenylene and biphenylene.} The ^{divalent alicyclic group represented by R 2} includes cyclohexanediyl and the like. Examples of the divalent heterocyclic group represented by R ^{2 include furandiyl groups.} The divalent condensed ring group represented by ^{R 2 includes naphthylene and the like.}

The side chain a is preferably represented by the following formula (a1) (hereinafter also referred to as side chain a1). [化6]

In the formula (a1), R ¹ , R ² and a are the same as described above. R ^3A is a single bond, -O-, -C(=O)-O- or -OC(=O)-. The benzene ring in formula (a1) can also be selected from alkyl groups with 1 to 6 carbons, haloalkyl groups with 1 to 6 carbons, alkoxy groups with 1 to 6 carbons, and halogens with 1 to 6 carbons. Substituents in alkoxy, cyano and nitro are substituted. The dashed line is the atomic bond.

The side chain a1 is preferably represented by the following formula (a1-1), for example. [化7]

In the formula (a1-1), L is a linear or branched alkylene group having 1 to 16 carbon atoms. X is a single bond, -O-, -C(=O)-O- or -O-C(=O)-.

(A) The side chain type polymer is preferably one that reacts with light in the wavelength range of 250 to 400 nm and exhibits liquid crystallinity in the temperature range of 100 to 300°C. (A) The side chain type polymer preferably has a photosensitive side chain that reacts to light in the wavelength range of 250 to 400 nm.

(A) The side chain type polymer has a photosensitive side chain bonded to the main chain, which can be sensitive to light and cause a crosslinking reaction or an isomerization reaction. The structure of the photosensitive side chain type polymer that can exhibit liquid crystallinity is not particularly limited as long as it meets such characteristics, but it is preferable that the side chain structure has a rigid mesogen component. When the above-mentioned side chain type polymer is used as a single-layer retardation material, stable optical anisotropy can be obtained.

A more specific example of the structure of the photosensitive side chain polymer that can exhibit liquid crystallinity is preferably a structure having a main chain and a side chain a; the main chain is selected from the group consisting of (meth)acrylate and itaconic acid. Free radical polymerizable groups such as esters, fumarates, maleates, α-methylene-γ-butyrolactone, styrene, vinyl, maleimine, norbornene, etc. and silicones Consists of at least one of the constituent groups.

In addition, in order to exhibit liquid crystallinity in the temperature range of 100 to 300°C, the (A) side chain type polymer preferably further has a side chain that exhibits only liquid crystallinity (hereinafter also referred to as side chain c). In addition, here "only exhibiting liquid crystallinity" means that the polymer with only side chain c will not exhibit optical alignment in the production process of the retardation material of the present invention (that is, steps (I) to (III) described later) It only shows the meaning of liquid crystallinity.

The side chain c is preferably any liquid crystal side chain selected from the group consisting of the following formulas (1) to (12). [化8]

[化9]

In formulas (1)~(12), A ¹ and A ² are independently a single bond, -O-, -CH ₂ -, -C(=O)-O-, -OC(=O)-,- C(=O)-NH-, -NH-C(=O)-, -CH=CH-C(=O)-O- or -OC(=O)-CH=CH-. R ¹¹ is -NO ₂ , -CN, halogen atom, phenyl, naphthyl, biphenyl, furyl, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group with 5 to 8 carbon atoms, carbon number 1 ~12 alkyl group or alkoxy group with carbon number 1-12. R ¹² is selected from the group consisting of a phenyl group, a naphthyl group, a biphenyl group, a furyl group, a monovalent nitrogen-containing heterocyclic group, a monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and a combination thereof The groups in the group, and the hydrogen atoms bonded to these groups can also be substituted with -NO ₂ , -CN, halogen atoms, alkyl groups with 1 to 5 carbons, or alkoxy groups with 1 to 5 carbons. R ¹³ is a hydrogen atom, -NO ₂ , -CN, -CH=C(CN) ₂ , -CH=CH-CN, halogen atom, phenyl, naphthyl, biphenyl, furanyl, monovalent nitrogen-containing hetero Cyclic group, monovalent alicyclic hydrocarbon group with carbon number 5-8, alkyl group with carbon number 1-12 or alkoxy group with carbon number 1-12. E is -C(=O)-O- or -OC(=O)-. d is an integer of 1-12. k1~k5 are each independently an integer of 0~2, but the total of k1~k5 is 2 or more. k6 and k7 are each independently an integer of 0-2, but the total of k6 and k7 is 1 or more. m1, m2, and m3 are each independently an integer of 1 to 3. n is 0 or 1. Z ¹ and Z ² are each independently a single bond, -C(=O)-, -CH ₂ O-, -CH=N- or -CF ₂ -. The dashed line is the atomic bond.

Among them, the side chain c is preferably represented by any one of formulas (1) to (11).

The side chain type polymer of the component (A) can be obtained by combining a monomer having a structure represented by formula (a), a monomer having a structure represented by formula (b), and a structure exhibiting only liquid crystallinity as desired The monomer is obtained by polymerization.

式中，R¹ 、R² 、R³ 、R、a、m及n同上所述。The monomer having a structure represented by the formula (a) (hereinafter also referred to as monomer M1) may be a compound represented by the following formula (M1). [化10]

In the formula, R ¹ , R ² , R ³ , R, a, m and n are the same as described above.

式中，R¹ 、R² 、R^3A 、R及a同上所述。The monomer M1 is preferably represented by the following formula (M1A). [化11]

In the formula, R ¹ , R ² , R ^3A , R and a are the same as described above.

式中，L及X同上所述。Among the monomers M1A, those represented by the following formula (M1B) are more preferable. [化12]

In the formula, L and X are the same as described above.

In the formulas (M1), (M1A), and (M1B), PL is a polymerizable group represented by any of the following formulas (PL-1) to (PL-5). [化13]

In formulas (PL-1)~(PL-5), Q ¹ , Q ² and Q ³ are hydrogen atoms, linear or branched alkyl with 1 to 10 carbons, or linear substituted by halogen Or branched alkyl with 1 to 10 carbons. The dashed line is the atomic bond ^{with R 1 or with L.} Among these monomers, some are commercially available, and some can be manufactured from known materials using known manufacturing methods.

式中，PL同上所述。p為2~9之整數。Examples of ideal examples of monomer M1 include those represented by the following formulas (M1-1) to (M1-5). [化14]

In the formula, PL is the same as described above. p is an integer of 2-9.

式中，PL、R¹ ~R⁴ 及a同上所述。The monomer having a structure represented by the formula (b) (hereinafter also referred to as monomer M2) may be a compound represented by the following formula (M2). [化15]

In the formula, PL, R ¹ to R ⁴ and a are the same as described above.

式中，R⁴ 、PL、L及X同上所述。The monomer M2 is preferably represented by the following formula (M2A). [化16]

In the formula, R ⁴ , PL, L and X are the same as described above.

Among these monomers, some are commercially available, and some can be manufactured from known materials using known manufacturing methods.

A monomer having a structure that only exhibits liquid crystallinity (hereinafter also referred to as monomer M3) refers to a monomer in which a polymer derived from the monomer exhibits liquid crystallinity, and the polymer can form a mesogen group at a side chain portion.

The mesogen group in the side chain can be biphenyl, phenyl benzoate, etc. alone, which is a mesogen structure group, or it can be a mesogen structure such as benzoic acid and the like that the side chains are bonded to each other by hydrogen bonding.的组。 The group. The mesogen group possessed by the side chain preferably has the following structure. [化17]

A more specific example of the monomer M3 is preferably a monomer selected from the group consisting of hydrocarbons, (meth)acrylates, itaconic acid esters, fumaric acid esters, maleic acid esters, α-methylene-γ-butyric acid Free radical polymerizable groups such as ester, styrene, vinyl, maleimide, norbornene, etc. and at least one polymerizable group from the group consisting of silicones, and are composed of formulas (1)~( 12) The structure of at least one of the structures. The monomer M3 is particularly preferably one having (meth)acrylate as the polymerizable group, and the end of the side chain is preferably -COOH.

The ideal example of the monomer M3 can be represented by the following formulas (M3-1) to (M3-9). [化18]

式中，PL及p同上所述。[化19]

In the formula, PL and p are the same as described above.

In addition, other monomers can be copolymerized within a range that does not impair the ability to exhibit photoreactivity and/or liquid crystallinity. Other monomers include, for example, commercially available monomers capable of radical polymerization. Specific examples of other monomers include unsaturated carboxylic acids, acrylate compounds, methacrylate compounds, maleimide compounds, acrylonitrile, maleic anhydride, styrene compounds, and vinyl compounds.

Specific examples of unsaturated carboxylic acids include acrylic acid, methacrylic acid, itaconic acid, maleic acid, and fumaric acid.

Examples of acrylate compounds include methyl acrylate, ethyl acrylate, isopropyl acrylate, benzyl acrylate, naphthyl acrylate, anthracene acrylate, methyl anthracene acrylate, phenyl acrylate, 2,2,2-triacrylate Fluoroethyl, tertiary butyl acrylate, cyclohexyl acrylate, isobornyl acrylate, 2-methoxyethyl acrylate, methoxytriethylene glycol acrylate, 2-ethoxyethyl acrylate, Tetrahydrofurfuryl acrylate, 3-methoxybutyl acrylate, 2-methyl-2-adamantyl acrylate, 2-propyl-2-adamantyl acrylate, 8-methyl-8-methyl acrylate -Tricyclodecyl, 8-ethyl-8-tricyclodecyl acrylate, etc.

Examples of the methacrylate compound include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, benzyl methacrylate, naphthyl methacrylate, anthracene methacrylate, and anthracene methacrylate. Methyl methacrylate, phenyl methacrylate, 2,2,2-trifluoroethyl methacrylate, tertiary butyl methacrylate, cyclohexyl methacrylate, isobornyl methacrylate, methacrylic acid -2-methoxyethyl, methoxytriethylene glycol methacrylate, 2-ethoxyethyl methacrylate, tetrahydrofurfuryl methacrylate, 3-methoxy methacrylate Butyl ester, 2-methyl-2-adamantyl methacrylate, 2-propyl-2-adamantyl methacrylate, 8-methyl-8-tricyclodecyl methacrylate, methyl methacrylate 8-ethyl-8-tricyclodecyl acrylate and the like.

Examples of the vinyl compound include vinyl ether, methyl vinyl ether, benzyl vinyl ether, 2-hydroxyethyl vinyl ether, phenyl vinyl ether, and propyl vinyl ether. Examples of the styrene compound include styrene, 4-methylstyrene, 4-chlorostyrene, 4-bromostyrene, and the like. Examples of the maleimide compound include maleimide, N-methylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide.

The content of the side chain a in the side chain type polymer of the present invention, considering the viewpoint of photoreactivity, is preferably 20 to 99.9 mol%, more preferably 30 to 95 mol%, and 40 to 90 mol%. Better.

The content of the side chain b in the side chain type polymer of the present invention, considering the retardation value, is preferably 0.1 to 80 mol%, more preferably 5 to 70 mol%, and 10 to 60 mol%. Better.

The content of the side chain c in the side chain type polymer of the present invention is preferably 80 mol% or less from the viewpoint of photoreactivity, preferably 10 to 70 mol%, and even more preferably 20 to 60 mol% .

The side chain type polymer of the present invention may contain other side chains as described above. When the content of other side chains is less than 100 mol% of the total content of side chains a to c, it is the remainder.

(A) The production method of the side chain type polymer of the component is not particularly limited, and general industrially operated methods can be used. Specifically, it can be produced by radical polymerization, cationic polymerization, or anionic polymerization using the above-mentioned monomer M1, monomer M2, monomer M3 as desired, and vinyl groups in other monomers as desired. Among them, in view of the ease of reaction control, etc., radical polymerization is particularly preferred.

The polymerization initiator for radical polymerization can be used: radical polymerization initiator (free radical thermal polymerization initiator, radical photopolymerization initiator), or reversible addition-fragmentation type chain transfer (RAFT) polymerization test Well-known compounds such as drugs.

The radical thermal polymerization initiator is a compound that generates free radicals by heating above the decomposition temperature. Such radical thermal polymerization initiators include, for example, ketone peroxides (methyl ethyl ketone peroxide, cyclohexanone peroxide, etc.), dioxygen peroxides (acetyl peroxide, benzyl peroxide, etc.), peroxides Hydrogen oxides (hydrogen peroxide, tertiary butyl hydroperoxide, cumene hydroperoxide, etc.), dialkyl peroxides (di(tertiary butyl) peroxide, dicumyl peroxide, etc.) Dilaurin peroxide, etc.), peroxide ketals (dibutyl cyclohexane peroxide, etc.), alkyl peroxides (tertiary butyl peroxide neodecanoate, tertiary trimethyl acetic acid peroxide) Butyl ester, 2-ethylcyclohexane acid tertiary pentyl peroxide, etc.), persulfates (potassium persulfate, sodium persulfate, ammonium persulfate, etc.), azo compounds (azobisisobutyronitrile, etc.) , 2,2'-bis(2-hydroxyethyl)azobisisobutyronitrile, etc.) and so on. A radical thermal polymerization initiator may be used individually by 1 type, and may be used in combination of 2 or more types.

、異丙基𠮿酮、2,4-二乙基-9-氧硫代𠮿

、2-乙基蒽醌、苯乙酮、2-羥基-2-甲基苯丙酮、2-羥基-2-甲基-4’-異丙苯丙酮、1-羥基環己基苯基酮、異丙苯偶姻醚、異丁苯偶姻醚、2,2-二乙氧基苯乙酮、2,2-二甲氧基-2-苯基苯乙酮、樟腦醌、苯并蒽酮、2-甲基-1-[4-(甲基硫代)苯基]-2-𠰌啉基丙烷-1-酮、2-苄基-2-二甲基胺基-1-(4-𠰌啉基苯基)-丁酮-1、4-二甲基胺基苯甲酸乙酯、4-二甲基胺基苯甲酸異戊酯、4,4’-二(三級丁基過氧化羰基)二苯甲酮、3,4,4’-三(三級丁基過氧化羰基)二苯甲酮、2,4,6-三甲基苯甲醯基二苯基氧化膦、2-(4’-甲氧基苯乙烯)-4,6-雙(三氯甲基)均三𠯤、2-(3’,4’-二甲氧基苯乙烯)-4,6-雙(三氯甲基)均三𠯤、2-(2’,4’-二甲氧基苯乙烯)-4,6-雙(三氯甲基)均三𠯤、2-(2’-甲氧基苯乙烯)-4,6-雙(三氯甲基)均三𠯤、2-(4’-戊基氧基苯乙烯)-4,6-雙(三氯甲基)均三𠯤、4-[對N,N-二(乙氧基羰基甲基)]-2,6-二(三氯甲基)均三𠯤、1,3-雙(三氯甲基)-5-(2’-氯苯基)均三𠯤、1,3-雙(三氯甲基)-5-(4’-甲氧基苯基)均三𠯤、2-(對二甲基胺基苯乙烯)苯并雙㗁唑、2-(對二甲基胺基苯乙烯)苯并噻唑、2-巰基苯并噻唑、3,3’-羰基雙(7-二乙基胺基香豆素)、2-(鄰氯苯基)-4,4’,5,5’-四苯基-1,2’-聯咪唑、2,2’-雙(2-氯苯基)-4,4’,5,5’-肆(4-乙氧基羰基苯基)-1,2’-聯咪唑、2,2’-雙(2,4-二氯苯基)-4,4’,5,5’-四苯基-1,2’-聯咪唑、2,2’雙(2,4-二溴苯基)-4,4’,5,5’-四苯基-1,2’-聯咪唑、2,2’-雙(2,4,6-三氯苯基)-4,4’,5,5’-四苯基-1,2’-聯咪唑、3-(2-甲基-2-二甲基胺基丙醯基)咔唑、3,6-雙(2-甲基-2-𠰌啉基丙醯基)-9-正十二烷基咔唑、雙(5-2,4-環戊二烯-1-基)-雙(2,6-二氟-3-(1H-吡咯-1-基)-苯基)鈦、3,3’,4,4’-四(三級丁基過氧化羰基)二苯甲酮、3,3’,4,4’-四(三級己基過氧化羰基)二苯甲酮、3,3’-二(甲氧基羰基)-4,4’-二(三級丁基過氧化羰基)二苯甲酮、3,4’-二(甲氧基羰基)-4,3’-二(三級丁基過氧化羰基)二苯甲酮、4,4’-二(甲氧基羰基)-3,3’-二(三級丁基過氧化羰基)二苯甲酮、2-(3-甲基-3H-苯并噻唑-2-亞基)-1-萘-2-基-乙酮、2-(3-甲基-1,3-苯并噻唑-2(3H)-亞基)-1-(2-苯甲醯基)乙酮等。自由基光聚合起始劑可單獨使用1種，也可將2種以上混合使用。The radical photopolymerization initiator is not particularly limited as long as it is a compound that initiates radical polymerization by irradiation. Such radical photopolymerization initiators include benzophenone, Michler's ketone, 4,4'-bis(diethylamino)benzophenone, ketone, 9-oxygen Thio𠮿

, Isopropyl ketone, 2,4-diethyl-9-oxothio

, 2-Ethylanthraquinone, acetophenone, 2-hydroxy-2-methylpropiophenone, 2-hydroxy-2-methyl-4'-cuminone, 1-hydroxycyclohexylphenylketone, iso Propionyl benzoin ether, isobutyl benzoin ether, 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, camphorquinone, benzoanthrone, 2-Methyl-1-[4-(methylthio)phenyl]-2-𠰌linylpropan-1-one, 2-benzyl-2-dimethylamino-1-(4-𠰌 Alkylphenyl)-butanone-1, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 4,4'-bis(tertiary butylperoxycarbonyl) ) Benzophenone, 3,4,4'-tris(tertiary butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzyl diphenyl phosphine oxide, 2-( 4'-Methoxystyrene)-4,6-bis(trichloromethyl)s-trichloromethane, 2-(3',4'-dimethoxystyrene)-4,6-bis(trichloromethyl) Methyl)same tris, 2-(2',4'-dimethoxystyrene)-4,6-bis(trichloromethyl)sstris, 2-(2'-methoxystyrene )-4,6-bis(trichloromethyl)s-tris, 2-(4'-pentyloxystyrene)-4,6-bis(trichloromethyl)ss-tris, 4-(pair N,N-bis(ethoxycarbonylmethyl))-2,6-bis(trichloromethyl)-trichloromethyl, 1,3-bis(trichloromethyl)-5-(2'-chlorobenzene Serotonin), 1,3-bis(trichloromethyl)-5-(4'-methoxyphenyl) serotrimonium, 2-(p-dimethylaminostyrene) benzobis㗁Azole, 2-(p-dimethylaminostyrene)benzothiazole, 2-mercaptobenzothiazole, 3,3'-carbonylbis(7-diethylaminocoumarin), 2-(o-chloro Phenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'- Si (4-ethoxycarbonylphenyl)-1,2'-biimidazole, 2,2'-bis(2,4-dichlorophenyl)-4,4',5,5'-tetraphenyl -1,2'-biimidazole, 2,2'bis(2,4-dibromophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2 '-Bis(2,4,6-trichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 3-(2-methyl-2-dimethyl Propylaminopropionyl)carbazole, 3,6-bis(2-methyl-2-pyrolinylpropionyl)-9-n-dodecylcarbazole, bis(5-2,4-ring Pentadien-1-yl)-bis(2,6-difluoro-3-(1H-pyrrol-1-yl)-phenyl)titanium, 3,3',4,4'-tetra(tertiary) Peroxycarbonyl)benzophenone, 3,3',4,4'-tetra(tertiary hexylperoxycarbonyl)benzophenone, 3,3'-bis(methoxycarbonyl)-4,4 '-Bis(tertiary butylperoxycarbonyl)benzophenone, 3,4'-bis(methoxycarbonyl)-4,3'-bis(tertiary butylperoxycarbonyl)benzophenone, 4,4'-Bis(methoxycarbonyl)-3,3'-bis(tertiary butylperoxycarbonyl)benzophenone, 2-(3-methyl-3H-benzothiazol-2-ylidene)-1 -Naphth-2-yl-ethanone, 2-(3-methyl-1,3-benzothiazole-2(3H)-ylidene)-1-(2-benzyl)ethanone, etc. A radical photopolymerization initiator may be used individually by 1 type, and may mix and use 2 or more types.

The radical polymerization method is not particularly limited, and an emulsion polymerization method, a suspension polymerization method, a dispersion polymerization method, a precipitation polymerization method, a bulk polymerization method, a solution polymerization method, etc. can be used.

The organic solvent used in the polymerization reaction is not particularly limited as long as it dissolves the produced polymer. Specific examples thereof include: N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-methyl-ε-caprolactone, dimethyl sulfide, tetramethyl urea, pyridine, dimethyl sulfide, hexamethyl sulfide, γ-butyrolactone, isopropanol, methoxymethyl Methylpentyl alcohol, dipentene, ethyl amyl ketone, methyl nonyl ketone, methyl ethyl ketone, methyl isoamyl ketone, methyl isopropyl ketone, methyl celluloid, ethyl celluloid Threon, methyl cellulose acetate, ethyl cellulose acetate, diethylene glycol monobutyl ether, ethyl diethylene glycol monoethyl ether, ethylene glycol, ethylene glycol monoacetate, ethylene glycol monoiso Propyl ether, ethylene glycol monobutyl ether, propylene glycol, propylene glycol monoacetate, propylene glycol monomethyl ether, propylene glycol tertiary butyl ether, dipropylene glycol monomethyl ether, diethylene glycol, diethylene glycol monoacetate, two Ethylene glycol dimethyl ether, dipropylene glycol monoacetate monomethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monoacetate mono Propyl ether, 3-methyl-3-methoxybutyl acetate, tripropylene glycol methyl ether, 3-methyl-3-methoxybutanol, diisopropyl ether, ethyl isobutyl ether, diisobutylene, Amyl acetate, butyl butyrate, butyl ether, diisobutyl ketone, methylcyclohexene, propyl ether, dihexyl ether, 1,4-dioxane, n-hexane, n-pentane, n-octane, Diethyl ether, cyclohexanone, ethylene carbonate, propylene carbonate, methyl lactate, ethyl lactate, methyl acetate, ethyl acetate, n-butyl acetate, propylene glycol monoethyl ether, methyl pyruvate, pyruvic acid Ethyl ester, methyl 3-methoxypropionate, ethyl 3-ethoxypropionate, ethyl 3-methoxypropionate, 3-ethoxypropionic acid, 3-methoxypropionic acid, 3 -Propyl methoxypropionate, butyl 3-methoxypropionate, diethylene glycol dimethyl ether, 4-hydroxy-4-methyl-2-pentanone, 3-methoxy-N,N -Dimethylpropaneamide, 3-ethoxy-N,N-dimethylpropaneamide, 3-butoxy-N,N-dimethylpropaneamide, etc.

The above-mentioned organic solvent may be used singly or in combination of two or more kinds. In addition, even if it is a solvent that cannot dissolve the produced polymer, it can be mixed and used in the above-mentioned organic solvent within a range that does not precipitate the produced polymer. In addition, during radical polymerization, oxygen in the organic solvent may hinder the polymerization reaction. Therefore, it is preferable to use an organic solvent that has been degassed to the extent possible.

The polymerization temperature during radical polymerization can be selected from any temperature of 30~150℃, preferably in the range of 50~100℃. In addition, the reaction can be carried out at any concentration. However, if the concentration is too low, it will be difficult to obtain a high molecular weight polymer. If the concentration is too high, the viscosity of the reaction solution will become too high and uniform stirring will become It is difficult, so the monomer concentration is preferably 1-50% by mass, more preferably 5-30% by mass. The reaction can be carried out at a high concentration at the beginning, and an organic solvent can be added thereafter.

In the above-mentioned radical polymerization reaction, if the ratio of the radical polymerization initiator to the monomer is large, the molecular weight of the obtained polymer will become smaller, and if it is smaller, the molecular weight of the obtained polymer will become larger. The ratio of the initiator relative to the monomer to be polymerized is preferably 0.1-10 mol%. In addition, various monomer components, solvents, initiators, etc. may be added during polymerization.

In order to recover the polymer produced from the reaction solution obtained by the above reaction, the reaction solution may be poured into a poor solvent, and these polymers may be precipitated. Examples of poor solvents used for precipitation include: methanol, acetone, hexane, heptane, butyl cellophane, methyl ethyl ketone, methyl isobutyl ketone, ethanol, toluene, benzene, diethyl ether, methyl ethyl ether , Water, etc. The polymer deposited in the poor solvent can be recovered by filtration, and dried under normal pressure or reduced pressure at normal temperature or by heating. In addition, by re-dissolving the recovered polymer in an organic solvent and repeating the operation of reprecipitation and recovery 2 to 10 times, the impurities in the polymer can be reduced. Examples of the poor solvent at this time include alcohols, ketones, hydrocarbons, and the like. If three or more poor solvents selected from these are used, the purification efficiency is further improved, so it is preferable.

The (A) side chain polymer of the present invention considers the strength of the coating film obtained, the workability during coating film formation and the uniformity of the coating film, the weight average molecular weight measured by the GPC (Gel Permeation Chromatography) method is preferably 2,000~2,000,000, more preferably 2,000~1,000,000, and even more preferably 5,000~200,000.

[(B) Organic solvent] (B) If the organic solvent of the component is an organic solvent that dissolves the polymer component, there is no particular limitation. Specific examples thereof include: N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, and N-methyl-ε-caprolactone , 2-pyrrolidone, N-ethyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, dimethyl sulfide, tetramethylurea, pyridine, dimethyl sulfide, hexamethyl Sulfene, γ-butyrolactone, 3-methoxy-N,N-dimethylpropaneamide, 3-ethoxy-N,N-dimethylpropaneamide, 3-butoxy-N , N-dimethyl propane amide, 1,3-dimethyl-2-imidazolidinone, ethyl amyl ketone, methyl nonyl ketone, methyl ethyl ketone, methyl isoamyl ketone, methyl Methyl isopropyl ketone, cyclohexanone, ethylene carbonate, propylene carbonate, diethylene glycol dimethyl ether, 4-hydroxy-4-methyl-2-pentanone, propylene glycol monoacetate, propylene glycol mono Methyl ether, propylene glycol tertiary butyl ether, dipropylene glycol monomethyl ether, diethylene glycol, diethylene glycol monoacetate, diethylene glycol dimethyl ether, dipropylene glycol monoacetate monomethyl ether, dipropylene glycol mono Methyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monoacetate monopropyl ether, 3-methyl-3-methoxybutyl acetate, tripropylene glycol Methyl ether and so on. These can be used individually by 1 type, and can also mix and use 2 or more types.

[Other ingredients] The polymer composition of the present invention may contain components other than the (A) and (B) components. Examples thereof include solvents or compounds that improve film thickness uniformity and surface smoothness at the time of coating the polymer composition, and compounds that improve the adhesion between the retardation material and the substrate, but are not limited to these.

Specific examples of solvents (poor solvents) that improve the uniformity of film thickness and surface smoothness include: isopropanol, methoxymethylpentanol, methyl cellulose, ethyl cellulose, and butyl cellophane Luce, methyl celluate acetate, ethyl celluite acetate, diethylene glycol monobutyl ether, ethyl diethylene glycol monoethyl ether, ethyl diethylene glycol monoethyl ether acetate, ethylene glycol, Ethylene glycol monoacetate, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, propylene glycol, propylene glycol monoacetate, propylene glycol monomethyl ether, propylene glycol tertiary butyl ether, dipropylene glycol monomethyl ether, diethyl Glycol, diethylene glycol monoacetate, diethylene glycol dimethyl ether, dipropylene glycol monoacetate monomethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, Dipropylene glycol monopropyl ether, dipropylene glycol monoacetate monopropyl ether, 3-methyl-3-methoxybutyl acetate, tripropylene glycol methyl ether, 3-methyl-3-methoxybutanol, two Isopropyl ether, ethyl isobutyl ether, diisobutylene, amyl acetate, butyl butyrate, butyl ether, diisobutyl ketone, methylcyclohexene, propyl ether, dihexyl ether, 1-hexanol, n-hexyl Alkane, n-pentane, n-octane, diethyl ether, methyl lactate, ethyl lactate, n-propyl lactate, n-butyl lactate, isoamyl lactate, methyl acetate, ethyl acetate, n-butyl acetate, acetic acid Propylene glycol monoethyl ether, methyl pyruvate, ethyl pyruvate, methyl 3-methoxypropionate, ethyl 3-ethoxypropionate, ethyl 3-methoxypropionate, 3-ethoxypropionate Acid, 3-methoxypropionic acid, 3-methoxypropionic acid propyl ester, 3-methoxypropionic acid butyl ester, 1-methoxy-2-propanol, 1-ethoxy-2-propanol Alcohol, 1-butoxy-2-propanol, 1-phenoxy-2-propanol, propylene glycol monoacetate, propylene glycol diacetate, propylene glycol-1-monomethyl ether-2-acetate, Solvents with low surface tension such as propylene glycol-1-monoethyl ether-2-acetate, dipropylene glycol, 2-(2-ethoxypropoxy)propanol, etc.

These poor solvents may be used individually by 1 type, and may mix and use 2 or more types. When the above-mentioned poor solvent is used, in order not to significantly reduce the solubility of the entire solvent contained in the polymer composition, its content in the solvent is preferably 5 to 80% by mass, and more preferably 20 to 60% by mass.

Examples of compounds that improve film thickness uniformity and surface smoothness include fluorine-based surfactants, silicone-based surfactants, and non-ionic surfactants. Specific examples of these include: F-top (registered trademark) 301, EF303, EF352 (manufactured by Tochem Products), MEGAFACE (registered trademark) F171, F173, R-30 (manufactured by DIC), FLUORAD FC430, FC431 (3M Company system), AsahiGuard (registered trademark) AG710 (AGC company system), SURFLON (registered trademark) S-382, SC101, SC102, SC103, SC104, SC105, SC106 (AGC SEIMI CHEMICAL company system), etc. The content of these surfactants is preferably 0.01 to 2 parts by mass relative to 100 parts by mass of the component (A), and more preferably 0.01 to 1 part by mass.

Specific examples of compounds that improve the adhesion between the retardation material and the substrate include functional silane-containing compounds. Specific examples include 3-aminopropyltrimethoxysilane, 3-aminopropyltriethyl Oxysilane, 2-aminopropyltrimethoxysilane, 2-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N -(2-Aminoethyl)-3-aminopropylmethyldimethoxysilane, 3-ureidopropyltrimethoxysilane, 3-ureidopropyltriethoxysilane, N-ethyl Oxycarbonyl-3-aminopropyltrimethoxysilane, N-ethoxycarbonyl-3-aminopropyltriethoxysilane, N-triethoxysilylpropyl triethylenetriamine, N -Trimethoxysilyl propyl triethylenetriamine, 10-trimethoxysilyl-1,4,7-triazadecane, 10-triethoxysilyl-1,4,7-triazide Heterodecane, Acetate-9-trimethoxysilyl-3,6-diazepanonate, Acetate-9-triethoxysilyl-3,6-diazepanonyl, N-benzyl- 3-aminopropyltrimethoxysilane, N-benzyl-3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-phenyl-3 -Aminopropyltriethoxysilane, N-bis(oxyethylene)-3-aminopropyltrimethoxysilane, N-bis(oxyethylene)-3-aminopropyltriethyl Oxysilane and so on.

In addition, in addition to the improvement of the adhesion between the substrate and the retardation material, in order to prevent the degradation of the characteristics caused by the backlight when the polarizing plate is formed, phenoplast-based compounds and epoxy-containing compounds can also be used. Add to polymer composition.

Specific examples of phenol plastic additives are shown below, but are not limited thereto. [化20]

Specific examples of epoxy group-containing compounds include: ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, and polypropylene glycol diglycidyl ether. Propylene oxide, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, glycerol diglycidyl ether, 2,2-dibromoneopentyl glycol diglycidyl ether , 1,3,5,6-tetraepoxypropyl-2,4-hexanediol, N,N,N',N'-tetraepoxypropyl-m-xylene diamine, 1,3- Bis(N,N-diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraepoxypropyl-4,4'-diaminodiphenylmethane, etc.

When using a compound that improves the adhesion to the substrate, its content is preferably 0.1-30 parts by mass, and more preferably 1-20 parts by mass relative to 100 parts by mass of the polymer components contained in the polymer composition. If the content is less than 0.1 parts by mass, the effect of improving the adhesion cannot be expected, and if it is more than 30 parts by mass, the alignment of the liquid crystal may deteriorate.

A photosensitizer can be used as an additive. The photosensitizer is preferably a colorless sensitizer and a triplet sensitizer.

、苯并蒽酮、噻唑啉(2-苯甲醯基亞甲基-3-甲基-β-萘并噻唑啉、2-(β-萘甲醯基亞甲基)-3-甲基苯并噻唑啉、2-(α-萘甲醯基亞甲基)-3-甲基苯并噻唑啉、2-(4-聯苯甲醯基亞甲基)-3-甲基苯并噻唑啉、2-(β-萘甲醯基亞甲基)-3-甲基-β-萘并噻唑啉、2-(4-聯苯甲醯基亞甲基)-3-甲基-β-萘并噻唑啉、2-(對氟苯甲醯基亞甲基)-3-甲基-β-萘并噻唑啉等)、㗁唑啉(2-苯甲醯基亞甲基-3-甲基-β-萘并㗁唑啉、2-(β-萘甲醯基亞甲基)-3-甲基苯并㗁唑啉、2-(α-萘甲醯基亞甲基)-3-甲基苯并㗁唑啉、2-(4-聯苯甲醯基亞甲基)-3-甲基苯并㗁唑啉、2-(β-萘甲醯基亞甲基)-3-甲基-β-萘并㗁唑啉、2-(4-聯苯甲醯基亞甲基)-3-甲基-β-萘并㗁唑啉、2-(對氟苯甲醯基亞甲基)-3-甲基-β-萘并㗁唑啉等)、苯并噻唑、硝基苯胺(間或對硝基苯胺、2,4,6-三硝基苯胺等)、硝基乙烷合萘(5-硝基乙烷合萘等)、2-[(間羥基對甲氧基)苯乙烯]苯并噻唑、苯偶姻烷基醚、N-烷基化酞酮(N-alkylated phthalone)、苯乙酮縮酮(2,2-二甲氧基苯基乙酮等)、萘(2-萘甲醇、2-萘甲酸等)、蒽(9-蒽甲醇、9-蒽甲酸等)、苯並吡喃、偶氮吲

、部香豆素(mero-coumarin)等。它們之中，宜為芳香族2-羥基酮(二苯甲酮)、香豆素、香豆素酮、羰基雙香豆素、苯乙酮、蒽醌、𠮿酮、9-氧硫代𠮿

及苯乙酮縮酮。The photosensitizers include: aromatic nitro compounds, coumarin (7-diethylamino-4-methylcoumarin, 7-hydroxy-4-methylcoumarin), coumarin ketone (keto coumarin), carbonyl dicoumarin, aromatic 2-hydroxy ketone, aromatic 2-hydroxy ketone (2-hydroxybenzophenone, mono- or di-p-(dimethylamino)-2-hydroxy diphenyl Ketone, etc.), acetophenone, anthraquinone, ketone, 9-oxothio

, Benzoanthrone, thiazoline (2-benzylmethylene-3-methyl-β-naphthazoline, 2-(β-naphthylmethylene)-3-methylbenzene And thiazoline, 2-(α-naphthylmethylene)-3-methylbenzothiazoline, 2-(4-bibenzylmethylene)-3-methylbenzothiazoline , 2-(β-naphthyl methylene)-3-methyl-β-naphthazoline, 2-(4-bibenzyl methylene)-3-methyl-β-naphthalene Thiazoline, 2-(p-fluorobenzylmethylene)-3-methyl-β-naphthazoline, etc.), azazoline (2-benzylmethylene-3-methyl -β-Naphthoxazoline, 2-(β-naphthoxymethylene)-3-methylbenzoxazoline, 2-(α-naphthoxymethylene)-3-methan Benzoxazoline, 2-(4-Bibenzamethylene)-3-methylbenzoxazoline, 2-(β-Naphthoxymethylene)-3-methyl -β-Naphthoxazoline, 2-(4-Bibenzylmethylene)-3-methyl-β-naphthazoline, 2-(p-fluorobenzylmethylene) -3-methyl-β-naphthazoline, etc.), benzothiazole, nitroaniline (meta or p-nitroaniline, 2,4,6-trinitroaniline, etc.), nitroethane and naphthalene (5-nitroethane and naphthalene, etc.), 2-[(m-hydroxyp-methoxy)styrene]benzothiazole, benzoin alkyl ether, N-alkylated phthalone (N-alkylated phthalone) , Acetophenone ketal (2,2-dimethoxyphenyl ethyl ketone, etc.), naphthalene (2-naphthyl alcohol, 2-naphthoic acid, etc.), anthracene (9-anthracene methanol, 9-anthracene acid, etc.), Benzopyran, azoindole

, Mero-coumarin and so on. Among them, preferred are aromatic 2-hydroxy ketones (benzophenone), coumarin, coumarin ketone, carbonyl dicoumarin, acetophenone, anthraquinone, ketone, 9-oxothio𠮿

And acetophenone ketal.

In addition to the above-mentioned components, the polymer composition of the present invention may also be added with a dielectric material in order to change the electrical properties such as the dielectric constant and conductivity of the retardation material within a range that does not impair the effects of the present invention. In addition, in order to increase the hardness and density of the film when the phase difference material is made, a cross-linking compound may be added.

[Preparation of polymer composition] In order that the polymer composition of the present invention is suitable for the formation of a single-layer retardation material, it is preferably prepared as a coating liquid. That is, the polymer composition used in the present invention is preferably prepared to dissolve the component (A) and the above-mentioned solvents and compounds that improve film thickness uniformity and surface smoothness, and compounds that improve the adhesion between the liquid crystal alignment film and the substrate. It is a solution made from the organic solvent of component (B). Here, the content of the component (A) is preferably 1-20% by mass in the composition of the present invention, more preferably 3-15% by mass, particularly preferably 3-10% by mass.

In addition to the polymer of component (A), the polymer composition of the present invention may also contain other polymers within a range that does not impair the liquid crystal display ability and photosensitive performance. At this time, the content of other polymers in the polymer component is preferably 0.5 to 80% by mass, and more preferably 1 to 50% by mass. Other polymers include, for example, poly(meth)acrylate, polyamide acid, polyimide, and other polymers that are not photosensitive side chain type polymers that can exhibit liquid crystallinity.

[Single layer retardation material] The single-layer retardation material of the present invention can be manufactured by a method including the following steps (I) to (III). (I) The step of coating the composition of the present invention on a substrate to form a coating film, (II) The step of irradiating the above-mentioned coating film with polarized ultraviolet rays, and (III) The step of heating the coating film irradiated with ultraviolet rays to obtain a retardation material.

[Step (I)] Step (I) is a step of applying the composition of the present invention on a substrate to form a coating film. More specifically, the composition of the present invention is coated on a substrate (for example, coated with silicon) by bar coating, spin coating, flow coating, roll coating, slit coating, slit coating followed by spin coating, inkjet method, printing method, etc. /Silicon dioxide substrates, silicon nitride substrates, substrates coated with metals (such as aluminum, molybdenum, chromium, etc.), glass substrates, quartz substrates, ITO substrates, etc.) or thin films (such as triacetyl cellulose (TAC) thin films) , Cycloolefin polymer film, polyethylene terephthalate film, acrylic film and other resin films). After coating, you can use heating methods such as hot plate, thermal cycle oven, IR (infrared) oven, etc., to evaporate the solvent at 50~200℃, preferably at 50~150℃, to obtain the coating film.

[Step (II)] In step (II), the coating film obtained in step (I) is irradiated with polarized ultraviolet rays. When irradiating the film surface of the coating film with polarized ultraviolet rays, the substrate is irradiated with the ultraviolet rays polarized by the polarizing plate from a certain direction. As the above-mentioned ultraviolet rays, ultraviolet rays having a wavelength of 100 to 400 nm can be used. Depending on the type of coating film used, the most suitable wavelength should be selected through filters, etc. Moreover, for example, in order to selectively induce a photo-crosslinking reaction, ultraviolet rays with a wavelength of 290 to 400 nm can be selected and used. The ultraviolet rays can use, for example, light emitted from a high-pressure mercury lamp.

The amount of polarized ultraviolet radiation depends on the coating film used. The amount of exposure should be set to achieve the difference between the ultraviolet absorbance of the polarized ultraviolet light and the direction parallel to the polarization direction in the coating film and the ultraviolet absorbance of the direction perpendicular to the polarization direction, that is, the maximum value of ΔA, which is 1 to the amount of polarized ultraviolet light. In the range of 70%, it is better to set it in the range of 1~50%.

[Step (III)] In step (III), the coating film that has been irradiated with polarized ultraviolet rays in step (II) is heated. Heating can be used to impart alignment control ability to the coating film.

Heating can use heating means such as heating plate, thermal circulation oven, IR (infrared) oven and so on. The heating temperature can be determined in consideration of the temperature at which the liquid crystallinity of the coating film used is exhibited.

The heating temperature preferably falls within the temperature range at which the polymer of the component (A) contained in the composition of the present invention exhibits liquid crystallinity (hereinafter referred to as the liquid crystal development temperature). In the case of a film surface such as a coating film, the liquid crystal development temperature of the coating film surface is expected to be lower than the liquid crystal development temperature when the polymer of the component (A) is observed in a large volume. Therefore, it is better that the heating temperature falls within the temperature range of the liquid crystal display temperature on the surface of the coating film. That is, the temperature range of the heating temperature after the polarized ultraviolet ray is irradiated is preferably a temperature that is 10°C lower than the lower limit of the temperature range of the liquid crystal display temperature of the polymer of the component (A) as the lower limit, and is higher than the liquid crystal temperature range The temperature 10°C lower than the upper limit is the upper limit range temperature. If the heating temperature is lower than the above temperature range, the anisotropy enhancement effect caused by the heat in the coating film tends to become insufficient. Also, if the heating temperature is too high compared to the above temperature range, the coating film may be damaged. The state tends to be similar to an isotropic liquid state (isotropic phase). At this time, it may become difficult to realign it into a single direction by self-organization.

In addition, the liquid crystal development temperature refers to the isotropic phase transition temperature that causes the polymer or coating film surface to transition from the solid phase to the liquid crystal phase and above the liquid crystal transition temperature, and causes the liquid crystal phase to transition to the isotropic phase. (Tiso) The temperature below. For example, exhibiting liquid crystallinity below 130°C means that the liquid crystal transition temperature that causes the solid phase to transition to the liquid crystal phase is 130°C or less.

The thickness of the coating film formed after heating can be appropriately selected in consideration of the height difference, optical properties, and electrical properties of the substrate used, for example, 0.5 to 3 μm is ideal.

The single-layer retardation material of the present invention obtained in this way is a material having optical characteristics suitable for use in display devices, recording materials, etc., and is particularly suitable for making optical compensation films such as polarizers and retardation plates for liquid crystal displays. [Example]

Hereinafter, the present invention will be explained more specifically with synthesis examples, examples, and comparative examples, but the present invention is not limited to the following examples.

The M1 of the monomer having a photoreactive group used as an example is shown below, and the M2 of the monomer having a liquid crystal group is shown below. M1 is synthesized according to the synthesis method described in International Publication No. 2011/084546. M2 is synthesized according to the synthesis method described in Japanese Patent Application Laid-Open No. 9-118717. A commercially available product (M6BC, manufactured by Midori Kagaku Co., Ltd.) was used for M3. The M4 system uses 4-phenylcyclohexanone as a raw material and is synthesized by a known method. In addition, the side chain from M1 exhibits photoreactivity and liquid crystallinity, and the side chain from M2 to M4 exhibits only liquid crystallinity. [化21]

In addition, the abbreviations of reagents used in this example are as follows. (Organic solvents) THF: Tetrahydrofuran NMP: N-methyl-2-pyrrolidone BCS: Butyl Cellulose BCA: Butyl Cellulose Acetate PGME: Propylene Glycol Monomethyl Ether

(Polymerization initiator) AIBN: 2,2’-Azobisisobutyronitrile

[1] Synthesis of methacrylate polymer powder [Synthesis Example 1] Dissolve M1 (6.6g, 0.02mol), M2 (18.4g, 0.06mol) and M3 (7.7g, 0.02mol) in THF (132.7g). After degassing with a diaphragm pump, add AIBN (0.49g), and then degas. Then, it was made to react at 60 degreeC for 8 hours, and the methacrylate polymer solution was obtained. This polymer solution was dropped into methanol (1,000 mL), and the obtained precipitate was filtered. The precipitate was washed with methanol and dried under reduced pressure, thereby obtaining methacrylate polymer powder P1.

[Synthesis Example 2] Dissolve M1 (6.6g, 0.02mol), M2 (19.9g, 0.065mol) and M3 (5.7g, 0.015mol) in THF (131.2g). After degassing with a diaphragm pump, add AIBN (0.49g) , And then implement degassing. Then, it was made to react at 60 degreeC for 8 hours, and the methacrylate polymer solution was obtained. This polymer solution was dropped into methanol (1,000 mL), and the obtained precipitate was filtered. The precipitate was washed with methanol and dried under reduced pressure, thereby obtaining methacrylate polymer powder P2.

[Synthesis Example 3] Dissolve M1 (6.6g, 0.02mol), M2 (12.3g, 0.04mol) and M4 (15.5g, 0.04mol) in THF (139.7g). After degassing with a diaphragm pump, add AIBN (0.49g) , And then implement degassing. Then, it was made to react at 60 degreeC for 8 hours, and the methacrylate polymer solution was obtained. This polymer solution was dropped into methanol (1,000 mL), and the obtained precipitate was filtered. The precipitate was washed with methanol and dried under reduced pressure, thereby obtaining methacrylate polymer powder P3.

[Synthesis Example 4] M1 (6.6 g, 0.02 mol) and M2 (24.5 g, 0.08 mol) were dissolved in THF (131.2 g), and after degassing with a diaphragm pump, AIBN (0.49 g) was added, and then degassing was performed. Then, it was made to react at 60 degreeC for 8 hours, and the methacrylate polymer solution was obtained. This polymer solution was dropped into methanol (1,000 mL), and the obtained precipitate was filtered. The precipitate was washed with methanol and dried under reduced pressure, thereby obtaining methacrylate polymer powder P4.

[2] Preparation of polymer solution [Example 1-1] The methacrylate polymer powder P1 (1.5 g) was added to NMP (3.25 g), and the mixture was stirred at room temperature for 1 hour to dissolve it. PGME (1.5 g), BCS (3.0 g), and BCA (0.75 g) were added to this solution and stirred, thereby obtaining a polymer solution T1. This polymer solution T1 is directly used as a retardation material for forming a retardation film.

[Example 1-2] The methacrylate polymer powder P2 (1.5 g) was added to NMP (3.25 g), and the mixture was stirred at room temperature for 1 hour to dissolve it. PGME (1.5 g), BCS (3.0 g), and BCA (0.75 g) were added to this solution and stirred to obtain polymer solution T2. This polymer solution T2 is directly used as a retardation material for forming a retardation film.

[Example 1-3] The methacrylate polymer powder P3 (1.5 g) was added to NMP (3.25 g), and the mixture was stirred at room temperature for 1 hour to dissolve it. PGME (1.5 g), BCS (3.0 g), and BCA (0.75 g) were added to this solution and stirred to obtain polymer solution T3. This polymer solution T3 is directly used as a retardation material for forming a retardation film.

[Comparative Example 1] Methacrylate polymer powder P4 (1.5 g) was added to NMP (3.25 g), and the mixture was stirred at room temperature for 1 hour to dissolve it. PGME (1.5 g), BCS (3.0 g), and BCA (0.75 g) were added to this solution and stirred, thereby obtaining a polymer solution CT1. This polymer solution CT1 is directly used as a retardation material for forming a retardation film.

[3] Evaluation of polymer solution [Examples 2-1 to 2-3, Comparative Examples 2-1 to 2-3] (1) Preparation of evaluation substrate After filtering the polymer solution T1 with a 0.45 μm filter , Spin-coated on a glass substrate with transparent electrodes, dried on a hot plate at 70°C for 90 seconds to form a retardation film with a thickness of 1.0μm. Then, after irradiating a 313nm ultraviolet 10mJ/cm ² on the coating film surface via a polarizing plate, it was heated on a hot plate at 180° C. for 20 minutes to obtain a substrate S1 provided with a retardation film. Similarly, polymer solutions T2, T3, and CT1 were used to prepare substrates S2, S3, and CS1 to CS3 with retardation film with predetermined film thickness at the calcination temperature shown in Table 1, respectively.

(2) Phase difference evaluation The AxoScan manufactured by Axometrics was used to evaluate the phase difference of the substrates S1~S3 and CS1~CS3 at 550nm. The results are shown in Table 1.

(3) Haze evaluation The HAZE Meter HZ-V3 manufactured by Suga Test Instruments was used to evaluate the phase difference of the substrates S1~S3 and CS1~CS3 at 550nm. The results are shown in Table 1.

[Table 1] Polymer solution Substrate Calcining temperature (℃) Film thickness (μm) Phase difference Haze Example 2-1 T1 S1 180°C 1.0 130 0.09 Example 2-2 T2 S2 170°C 1.0 128 0.08 Example 2-3 T3 S3 180°C 1.0 120 0.1 Comparative example 2-1 CT1 CS1 150°C 1.5 125 0.2 Comparative example 2-2 CT1 CS2 150°C 1.0 85 0.05 Comparative example 2-3 CT1 CS3 180°C 1.0 15 0.05

As shown in Table 1, the following results can be obtained from the comparison between the examples and the comparative examples: the polymer solutions of the examples still exhibit high retardation values even if they are thin films. In addition, from the investigation of Comparative Example 2-3, it was observed that the retardation value was greatly reduced due to high-temperature firing. Therefore, it can be said that the high retardation value of the thin film is not caused by the firing temperature.

Claims (7)

A polymer composition comprising: (A) a side chain polymer having a side chain having a photoreactive site represented by the following formula (a) and a side chain having a site represented by the following formula (b), and (B )Organic solvents;

In the formula, R ¹ is an alkylene group with 1 to 30 carbon atoms, and one or more hydrogen atoms in the alkylene group may also be substituted with fluorine atoms or organic groups; in addition, -CH _{2 in} ^{R 1} CH ₂ -can also be substituted for -CH=CH-, and -CH ₂ ^{-in R 1} can also be substituted for selected from -O-, -NH-C(=O)-, -C(=O )-NH-, -C(=O)-O-, -OC(=O)-, -NH-, -NH-C(=O)-NH- and -C(=O)- in the group; but adjacent -CH ₂ - are not simultaneously substituted with these groups; and, -CH ₂ - may be terminated in the R ¹ -CH ^₂ -; R ₂ is a divalent aromatic group, Divalent alicyclic group, divalent heterocyclic group or divalent condensed ring group; R ³ is a single bond, -O-, -C(=O)-O-, -OC(=O)- or- CH=CH-C(=O)-O-; R ⁴ is 1,4-phenylene or trans-1,4-cyclohexylene; R is alkyl with 1~6 carbons and 1~ 6 haloalkyl, carbon 1~6 alkoxy, carbon 1~6 haloalkoxy, cyano or nitro, and when c≧2, each R can be the same or different ; The benzene ring in formula (b) can also be selected from alkyl groups with carbon numbers 1 to 6, haloalkyl groups with carbon numbers 1 to 6, alkoxy groups with carbon numbers 1 to 6, and carbon numbers 1 to 6 Substituents in haloalkoxy, cyano and nitro; a is 0, 1 or 2; b is 0 or 1; c is an integer conforming to 0≦c≦2b+4; dashed lines are atomic bonds. The polymer composition of claim 1, wherein the side chain having a photoreactive site is represented by the following formula (a1);

In the formula, R ¹ , R ² and a are the same as described above; R ^3A is a single bond, -O-, -C(=O)-O- or -OC(=O)-; the benzene ring in formula (a1) It can also be selected from alkyl groups with 1 to 6 carbons, haloalkyls with 1 to 6 carbons, alkoxys with 1 to 6 carbons, haloalkoxys with 1 to 6 carbons, cyano and nitro groups. Substituents in the group are substituted; dashed lines are atomic bonds. The polymer composition of claim 1 or 2, wherein the (A) side chain type polymer further has side chains exhibiting only liquid crystallinity. The polymer composition of claim 3, wherein the side chain exhibiting only liquid crystallinity is a liquid crystal side chain represented by any one of the following formulas (1) to (12);

In the formula, A ¹ and A ² are each independently a single bond, -O-, -CH ₂ -, -C(=O)-O-, -OC(=O)-, -C(=O)-NH -, -NH-C(=O)-, -CH=CH-C(=O)-O- or -OC(=O)-CH=CH-; R ¹¹ is -NO ₂ , -CN, halogen atom , Phenyl, naphthyl, biphenyl, furanyl, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group with 5 to 8 carbons, alkyl with 1 to 12 carbons or with 1 to 12 carbons Alkoxy; R ¹² is selected from phenyl, naphthyl, biphenyl, furanyl, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group with 5 to 8 carbon atoms, and combinations thereof The obtained groups are the groups in the group, and the hydrogen atoms bonded to these groups can also be substituted with -NO ₂ , -CN, halogen atoms, alkyl groups with 1 to 5 carbons or groups with 1 to 5 carbons Alkoxy; R ¹³ is a hydrogen atom, -NO ₂ , -CN, -CH=C(CN) ₂ , -CH=CH-CN, halogen atom, phenyl, naphthyl, biphenyl, furyl, 1 A valent nitrogen-containing heterocyclic group, a monovalent alicyclic hydrocarbon group with 5 to 8 carbons, an alkyl group with 1 to 12 carbons or an alkoxy group with 1 to 12 carbons; E is -C(=O)-O- Or -OC(=O)-; d is an integer of 1~12; k1~k5 are each independently an integer of 0~2, but the total of k1~k5 is 2 or more; k6 and k7 are each independently 0~ 2 is an integer, but the total of k6 and k7 is 1 or more; m1, m2, and m3 are each independently an integer from 1 to 3; n is 0 or 1; Z ¹ and Z ² are each independently a single bond, -C (=O)-, -CH ₂ O-, -CH=N- or -CF ₂ -; dashed lines are atomic bonds. The polymer composition of claim 4, wherein the side chain exhibiting only liquid crystallinity is a liquid crystal side chain represented by any one of formulas (1) to (11). A manufacturing method of a single-layer retardation material includes the following steps: (I) Coating the polymer composition of any one of claims 1 to 5 on a substrate to form a coating film, (II) irradiate the coating film with polarized ultraviolet rays, and (III) The coating film irradiated with ultraviolet rays is heated to obtain a retardation material. A single-layer phase difference material obtained from the polymer composition of any one of claims 1 to 5.