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  • C07C219/14—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having at least one of the hydroxy groups esterified by a carboxylic acid having the esterifying carboxyl group bound to a carbon atom of a six-membered aromatic ring
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  • C07C235/48—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to carbon atoms of six-membered aromatic rings and singly-bound oxygen atoms bound to the same carbon skeleton with carbon atoms of carboxamide groups and singly-bound oxygen atoms bound to carbon atoms of the same non-condensed six-membered aromatic ring having the nitrogen atom of at least one of the carboxamide groups bound to an acyclic carbon atom of a hydrocarbon radical substituted by singly-bound oxygen atoms
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  • C07C235/56—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to carbon atoms of six-membered aromatic rings and singly-bound oxygen atoms bound to the same carbon skeleton with carbon atoms of carboxamide groups and singly-bound oxygen atoms bound to carbon atoms of the same non-condensed six-membered aromatic ring having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a six-membered aromatic ring
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  • C07C43/20—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring
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  • C07C69/76—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
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  • C07C69/84—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic ring
  • C07C69/92—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic ring with etherified hydroxyl groups
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  • C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
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• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B5/00—Optical elements other than lenses
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Definitions

• the present invention includes compounds (particularly, liquid crystal orientation promoters) useful for various uses, including materials for various optical members such as optically anisotropic films, visible light reflective films, and heat shield films, and the like.
• the present invention relates to a liquid crystal composition and a cured product, and a film using these.
• the liquid crystal is applied on a film (alignment film) that has been subjected to alignment treatment, it will be aligned regularly. Further, the alignment state of the liquid crystal can be controlled by sandwiching the liquid crystal between the two alignment films. Therefore, in a liquid crystal display device consisting of a rod-shaped liquid crystal molecule, a liquid crystal cell composed of two substrates for encapsulating the rod-shaped liquid crystal molecule, and an electrode layer for applying a voltage to the rod-shaped liquid crystal molecule, the liquid crystal display device is formed on the two substrates. Since the rod-shaped liquid crystal molecules are injected into the gaps between the formed alignment films, the orientation state of the rod-shaped liquid crystal molecules can be controlled relatively easily.
• an optical compensation sheet (phase difference plate) is arranged between the liquid crystal cell and the polarizing plate.
• an optically anisotropic element having an optically anisotropic layer formed of liquid crystal molecules on a transparent support is used as an optical compensation sheet.
• the optically anisotropic layer is formed by orienting liquid crystal molecules and fixing the orientation state.
• the liquid crystal molecules are oriented by a single alignment film provided between the transparent support and the optically anisotropic layer.
• the present inventors have clarified that the usable concentration range and solubility of the liquid crystal alignment accelerator described in Patent Document 1 are not always sufficient, and there is still room for improvement. Further, the present inventors also have room for improvement in the liquid crystal alignment accelerator described in Patent Document 2 because it may contain PFOA (perfluorooctanoic acid) and its analogs, which are pointed out to be environmentally harmful. It became clear that.
• PFOA perfluorooctanoic acid
• the present invention solves the above-mentioned problems in the prior art, and provides a compound which exhibits sufficient solubility, has a wide usable concentration range, is environmentally friendly, and exhibits excellent liquid crystal orientation promoting property. Make it an issue.
• Another object of the present invention is to provide a liquid crystal composition in which liquid crystal molecules can be easily and uniformly oriented by the above compound and a cured product thereof.
• Another object of the present invention is to provide a film using the liquid crystal composition or the cured product (for example, an optically anisotropic film, a visible light reflecting film, a heat shield film, etc.).
• the present inventors have a predetermined ring structure and a predetermined fluorine-containing terminal structure in the molecule, and have two predetermined fluorine-containing terminal structures in the molecule.
• the present invention has been completed by finding that the compounds having the above-mentioned compounds exhibit sufficient solubility, a wide usable concentration range, environmental suitability, and excellent liquid crystal orientation promoting property. That is, the present inventors have found that the above problems can be solved by the following configuration.
• the molecule has a structure A represented by the following A and a structure B represented by the following B.
• a compound having two or more of the above structures B in the molecule A: A structure having at least one ring structure having an aromatic attribute, and having a total number of ⁇ electrons in the aromatic ring structure in the molecule of 8 or more.
• B A fluorine-containing terminal structure represented by any of the formulas (B-1) to (B-5) described later.
• [6] The compound according to any one of [1] to [5], which is used as a liquid crystal alignment accelerator.
• [7] A liquid crystal composition containing the compound according to any one of [1] to [6] and a polymerizable liquid crystal compound.
• [8] The liquid crystal composition according to [7], wherein the polymerizable liquid crystal compound is a rod-shaped liquid crystal compound or a disk-shaped liquid crystal compound.
• [10] A cured product obtained by polymerizing the liquid crystal composition according to any one of [7] to [9].
• [11] A film containing at least one of the cured products according to [10].
• [12] A film obtained by fixing the cholesteric liquid crystal phase of the liquid crystal composition according to any one of [7] to [9]. [13] The film according to [11] or [12], which exhibits optical anisotropy. [14] The film according to any one of [11] to [13], which exhibits selective reflection characteristics. [15] The film according to [14], which exhibits selective reflection characteristics in the infrared wavelength region. [16] The film according to [14], which exhibits selective reflection characteristics in the visible light wavelength range.
• the present invention it is possible to provide a compound which exhibits sufficient solubility, has a wide usable concentration range, is environmentally friendly, and exhibits excellent liquid crystal orientation promoting property. Further, according to the present invention, it is also possible to provide a liquid crystal composition in which liquid crystal molecules can be easily and uniformly oriented by the above compound and a cured product thereof. Further, according to the present invention, it is also possible to provide a film using the liquid crystal composition or the cured product (for example, an optically anisotropic film, a visible light reflecting film, a heat shield film, etc.).
• the description of the constituent elements described below may be based on typical embodiments and specific examples of the present invention, but the present invention is not limited to such embodiments and specific examples.
• the numerical range represented by using "-" in the present specification means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
• a substance corresponding to each component may be used alone or in combination of two or more.
• the content of the component means the total content of the substances used in combination unless otherwise specified.
• (meth) acrylate is a notation representing “acrylate” or “methacrylate”
• (meth) acrylic is a notation representing "acrylic” or “methacrylic”.
• (Meta) acryloyl is a notation representing "acryloyl” or "methacrylic acid”.
• the compound of the present invention is a compound having a structure A represented by the following A and a structure B represented by the following B in the molecule, and having two or more structures B in the molecule.
• A A structure having at least one ring structure having an aromatic attribute, and having a total number of ⁇ electrons in the aromatic ring structure in the molecule of 8 or more.
• B A fluorine-containing terminal structure represented by any of the following formulas (B-1) to (B-5).
• Ar 1 , Ar 2 , Ar 3 , Ar 4 , Ar 5 , Ar 6 and Ar 7 are independently substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, respectively. Represents. Further, in the above formulas (B-1) to (B-5), * represents a bonding position.
• the compound of the present invention Since the compound of the present invention has two or more of the above structures B (fluorine-containing terminal structures) in the molecule, it has a function as a liquid crystal alignment accelerator.
• a compound having an alkyl fluoride group at the terminal is effective as an orientation promoter, but conventionally known orientation promoters have a narrow concentration range to be used, low solubility, and the like. Its use was limited due to the use of structures that could be harmful to the environment.
• the compound of the present invention exhibits the same or higher orientation performance with a wider concentration range and good solubility, and does not have a long-chain perfluoroalkyl structure that may be harmful to the environment.
• the composition containing them has an advantage that it is easy to use in production. Further, since the curable polymerizable liquid crystal composition has orientation performance, it is useful for various applications such as optical members.
• the compound of the present invention has a structure A represented by the following A.
• A A structure having at least one ring structure having an aromatic attribute, and having a total number of ⁇ electrons in the aromatic ring structure in the molecule of 8 or more.
• the arylamine structures represented by the above formulas (I) to (IV) are excluded.
• a structure represented by the following formula (1) or (2) is preferable for the reason of exhibiting more excellent liquid crystal orientation promoting property.
• m 0 or 1
• n 1 or 2
• p represents an integer of 0 to 3.
• a plurality of L A, Cy 2, m, L B, Cy 3 and n may each be the same or different.
• n 2
• a plurality of L B and Cy 3 may each be the same or different.
• L A and L B are each independently a single bond or a divalent linking group.
• Cy 1 , Cy 2 and Cy 3 independently represent a ring structure represented by any of the following formulas (CY-1) to (CY-23).
• Cy 1 , Cy 2 and Cy 3 has a ring structure having an aromatic attribute, and among Cy 1 , Cy 2 and Cy 3 , the number of ⁇ electrons in the ring structure representing aromaticity The total is 8 or more.
• q represents 3 or 4, more Cy 4 may each be the same or different.
• L C represents a q-valent linking group.
• Cy 4 represents a ring structure represented by any of the following formulas (CY-1) to (CY-23).
• at least one is a ring structure having aromaticity among the plurality of Cy 4, the sum of the ⁇ electrons of number of ring structures representing aromaticity is 8 or more.
• substituents include a halogen atom, a cyano group, a hydroxy group, an amino group, and a linear or branched alkyl group having 1 to 30 carbon atoms.
• R represents an alkyl group having 1 to 3 carbon atoms.
• the hydrogen atom in the alkyl group may be substituted with a cyano group or a halogen atom, or may be substituted with the structure B.
• a halogen atom, a cyano group, or an alkyl group having 1 to 10 carbon atoms is preferable, and any methylene group in the alkyl group having 1 to 10 carbon atoms is -O-, -NR.
• At least one of Cy 1 , Cy 2 and Cy 3 has a ring structure having an aromatic attribute, and among Cy 1 , Cy 2 and Cy 3 , a ring structure representing aromaticity.
• the total number of ⁇ electrons is 8 or more.
• the ring structure having an aromatic attribute means a ring structure in which the number of ⁇ electrons is 4n + 2 (n is an integer of 0 or more), and a phenyl group, a naphthyl group, a triphenylene group and a condensed ring structure thereof are preferable.
• n is an integer of 0 or more
• a phenyl group, a naphthyl group, a triphenylene group and a condensed ring structure thereof are preferable.
• the aromatic ring structure contained in the structures represented by the above formulas (1) and (2) has two or more benzene rings (that is, the above formula (CY-1)) for the purpose of enhancing the liquid crystal orientation. It is preferable to have three or more, and it is more preferable to have three or more.
• L A and L B are each independently a single bond or a divalent linking group.
• the carbon atom and the nitrogen atom may be optionally substituted with a hydrogen atom.
• the divalent linking group may have, for example, a linear alkylene group having 1 to 18 carbon atoms, a branched or cyclic alkylene group having 3 to 18 carbon atoms, or a substituent.
• the L A and L B are preferably a single bond, a divalent linking group containing an -O-.
• L C represents a linking group q-valent (i.e., trivalent or tetravalent).
• a trivalent to tetravalent group can be mentioned, and the carbon atom and the nitrogen atom may be optionally substituted with a hydrogen atom.
• the trivalent linking group includes an aliphatic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic group and a group composed of a combination thereof, and an aliphatic hydrocarbon group, an aromatic hydrocarbon group and a heterocyclic group.
• Examples thereof include a group formed by combining at least one selected from, and at least one selected from -O-, -CO-, -COO-, -OCO- and -NH-, and an aliphatic hydrocarbon group is preferable. ..
• the number of carbon atoms of the aliphatic hydrocarbon group is preferably 1 to 30, more preferably 1 to 20, and even more preferably 1 to 15.
• Examples of the tetravalent linking group include a tetravalent arylene group and a group represented by the following formula. In the following formula, * represents the bonding position.
• m 0 or 1
• n 1 or 2
• p represents an integer of 0 to 3.
• p is preferably an integer of 1 to 3, and more preferably 2 or 3.
• q represents 3 or 4.
• the structure A is any of the following formulas (1-1) to (1-10) for the reason of exhibiting more excellent liquid crystal orientation promoting property. It is preferable that the structure is represented by.
• the hydrogen atom contained in the carbon atom constituting the ring structure may be substituted with a substituent or a group containing the above structure B.
• substituents include the same substituents in which the hydrogen atom in the above formulas (CY-1) to (CY-23) may be substituted, and the preferred range is also the same.
• L 1 , L 2 , L 3 and L 4 independently represent a single bond or a divalent linking group, respectively.
• the divalent linking group may have, for example, a linear alkylene group having 1 to 18 carbon atoms, a branched or cyclic alkylene group having 3 to 18 carbon atoms, or a substituent.
• L 1 , L 2 , L 3 and L 4 are preferably single bonds or divalent linking groups containing an oxygen atom or a nitrogen atom, respectively, and are preferably a single bond or a divalent linking group containing an oxygen atom or a nitrogen atom.
• the structure A particularly the structure represented by the above formula (2), is represented by the following formula (2-1) or (2-2) for the reason of exhibiting more excellent liquid crystal orientation promoting property. It is preferable that the structure is formed.
• the hydrogen atom contained in the carbon atom constituting the ring structure may be substituted with a substituent or a group containing the above structure B.
• substituents include the same substituents in which the hydrogen atom in the above formulas (CY-1) to (CY-23) may be substituted, and the preferred range is also the same.
• L 5 represents a trivalent linking group
• L 6 represents a tetravalent linking group.
• examples of the trivalent linking group represented by L 5 include a linear or branched trivalent structure having 3 or more methylene carbon atoms, and any methylene carbon can be an oxygen atom or a nitrogen atom.
• the number of methylene carbon atoms is more preferably 5 or more, and further preferably 7 or more.
• examples of the tetravalent linking group represented by L 6 include a linear or branched tetravalent structure having 3 or more atoms of methylene carbon, and any methylene carbon can be an oxygen atom or a nitrogen atom.
• the number of methylene carbon atoms is more preferably 5 or more, and further preferably 7 or more.
• the compound of the present invention has two or more structures B represented by the following B.
• B A fluorine-containing terminal structure represented by any of the following formulas (B-1) to (B-5).
• * represents the bonding position.
• the compound of the present invention has two or more of the above structures B in the molecule, and preferably has four or more. Further, the compound of the present invention preferably has 3 or more and 10 or less of the above-mentioned structure B in the molecule, and more preferably 4 or more and 6 or less. Further, in order to further enhance the effect of enhancing the liquid crystal orientation, it is preferable that at least two or more of the above structures B are substituted so as to have steric symmetry.
• the compound of the present invention preferably has two or more fluorine-containing terminal structures represented by the above formula (B-5) as the above structure B because the usable concentration range becomes wider. It is more preferable to have 4 to 6 fluorine-containing terminal structures represented by the above formula (B-5). Further, the compound of the present invention has 4 to 6 fluorine-containing terminal structures represented by the above formula (B-5) as the above structure B for the reason that the usable concentration range is further widened, and Among the above structures A, it is preferable that the ring structure located at the center of the molecule has a ring structure represented by the above formula (CY-1) or (CY-8).
• linking group X is not limited, but is a single bond or a linear or branched alkylene group having 1 to 30 carbon atoms. Can be mentioned.
• R represents an alkyl group having 1 to 3 carbon atoms.
• the compound of the present invention is synthesized by appropriately selecting and combining the synthetic methods described in JP-A-2002-129162, JP-A-2013-47204, and the documents cited in these publications. Can be done. In addition, other known synthesis methods can also be synthesized by combining them as necessary.
• the liquid crystal composition of the present invention is a liquid crystal composition containing the above-mentioned compound of the present invention and a polymerizable liquid crystal compound.
• the compound of the present invention described above can be used as a liquid crystal alignment accelerator.
• one or more kinds of non-polymerizable liquid crystal compounds may be further used in combination.
• two or more kinds of the above-mentioned compounds of the present invention liquid crystal alignment accelerator
• a liquid crystal alignment accelerator that does not correspond to the compound of the present invention may be used in combination.
• the content of the compound of the present invention (liquid crystal orientation accelerator) contained in the liquid crystal composition of the present invention is 0.01 to 20 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound described later. It is preferably 0.03 to 2 parts by mass, and more preferably 0.03 to 2 parts by mass.
• the polymerizable liquid crystal compound is a liquid crystal compound having a polymerizable group.
• the type of the polymerizable liquid crystal compound is not particularly limited. Generally, a liquid crystal compound can be classified into a rod-shaped type (rod-shaped liquid crystal compound) and a disk-shaped type (discotic liquid crystal compound) according to its shape. Further, the liquid crystal compound can be classified into a small molecule type and a high molecular type.
• a polymer generally refers to a polymer having a degree of polymerization of 100 or more (Polymer Physics / Phase Transition Dynamics, Masao Doi, p. 2, Iwanami Shoten, 1992).
• any liquid crystal compound can be used, but it is preferable to use at least one type of polymerizable rod-shaped liquid crystal compound or a polymerizable disk-shaped liquid crystal compound, and it is more preferable to use a polymerizable rod-shaped liquid crystal compound.
• Two or more kinds of polymerizable rod-shaped liquid crystal compounds, two or more kinds of polymerizable disk-shaped liquid crystal compounds, or a mixture of a polymerizable rod-shaped liquid crystal compound and a polymerizable disk-shaped liquid crystal compound may be used.
• Examples of the polymerizable disk-shaped liquid crystal compound include paragraphs 0161 to 0171 of JP-A-2002-129162, paragraphs 0020 to 0067 of JP-A-2007-108732, and paragraphs 0013 to 0108 of JP-A-2010-2404038. Can be preferably used.
• Examples of the polymerizable rod-shaped liquid crystal compound include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, and alkoxy-substituted phenylpyrimidines.
• Phenyldioxans, trans and alkenylcyclohexylbenzonitriles are preferably used.
• polymerizable rod-shaped liquid crystal compound examples include, for example, Makromol. Chem. , 190, 2255 (1989), Advanced Materials 5, 107 (1993), US Pat. No. 4,683,327, 562,648, 5770107, WO95 / 22586, 95/24455, 97 / No. 00600, No. 98/23580, No. 98/52905, Japanese Patent Application Laid-Open No. 1-272551, 6-16616, 7-110469, 11-8801, Special Table 11-513019, Japanese Patent Application Laid-Open No. Examples thereof include compounds described in 2001-328973, 2005-289980, 2014-198815, and Japanese Patent Application Laid-Open No. 2014-198814. Two or more kinds of polymerizable liquid crystal compounds may be used in combination. When two or more kinds of polymerizable liquid crystal compounds are used in combination, the orientation temperature can be lowered.
• the content of the polymerizable liquid crystal compound in the liquid crystal composition of the present invention is not particularly limited, but is preferably 50% by mass or more, more preferably 70% by mass or more, based on the total mass of the total solid content in the liquid crystal composition. ..
• the upper limit is not particularly limited, but in many cases, it is 95% by mass or less.
• the solid content means a component capable of forming an optically anisotropic layer from which the solvent has been removed, and is a solid content even if the property is liquid.
• the liquid crystal composition of the present invention contains, if necessary, a solvent, a chiral agent and a polymerizable initiator described later, or other additives (for example, cellulose ester).
• a solvent for example, a chiral agent and a polymerizable initiator described later, or other additives (for example, cellulose ester).
• other additives for example, cellulose ester.
• the liquid crystal composition of the present invention may contain a solvent.
• a solvent an organic solvent is preferably used.
• Organic solvents include amides (eg, N, N-dimethylformamide, etc.), sulfoxides (eg, dimethyl sulfoxide, etc.), hydrocarbons (eg, toluene, hexane, etc.), alkyl halides (eg, chloroform, dichloromethane, etc.), esters.
• ketones eg, acetone, methyl ethyl ketone, cyclohexanone, methyl isobutyl ketone, cyclopentanone, etc.
• ethers eg, tetrahydrofuran, 1,2-dimethoxyethane, etc.
• the solvent two or more kinds of organic solvents may be used in combination.
• the liquid crystal composition of the present invention may contain a chiral agent.
• the chiral agent has the function of inducing the helical structure of the cholesteric liquid crystal phase.
• the chiral agent may be selected according to the purpose because the twisting direction or the spiral pitch of the spiral induced differs depending on the compound structure.
• the chiral agent is not particularly limited, and a known compound (for example, Liquid Crystal Device Handbook, Chapter 3, Section 4-3, TN, Chiral Auxiliary for STN, p. 199, edited by the 142nd Committee of the Japan Society for the Promotion of Science, 1989). Description), isosorbide derivative, isomannide derivative, binaphthol derivative and the like can be used.
• the chiral agent generally contains an asymmetric carbon atom, but an axial asymmetric compound or a surface asymmetric compound that does not contain an asymmetric carbon atom can also be used as the chiral agent.
• Examples of axially asymmetric or surface asymmetric compounds include binaphthyl, helicene, paracyclophane and derivatives thereof.
• the chiral agent may have a polymerizable group. When both the chiral agent and the liquid crystal compound have a polymerizable group, the repeating unit derived from the polymerizable liquid crystal compound and the repeating unit derived from the chiral agent are derived by the polymerization reaction between the polymerizable chiral agent and the polymerizable liquid crystal compound.
• the polymerizable group of the polymerizable chiral agent is preferably a group of the same type as the polymerizable group of the polymerizable liquid crystal compound. Therefore, the polymerizable group of the chiral agent is preferably an unsaturated polymerizable group, an epoxy group or an aziridinyl group, more preferably an unsaturated polymerizable group, and preferably an ethylenically unsaturated polymerizable group. Especially preferable.
• the chiral agent may be a liquid crystal compound.
• the chiral auxiliary has a photoisomeric group
• a pattern of a desired reflection wavelength corresponding to the emission wavelength can be formed by irradiation with a photomask such as active light rays after coating and orientation.
• a photomask such as active light rays after coating and orientation.
• an isomerization site of a compound exhibiting photochromic properties an azobenzene site, a cinnamoyl site, an ⁇ -cyanocinnamoyl site, a stilbene site, and a chalcone site are preferable.
• Specific compounds include JP-A-2002-80478, JP-A-2002-80851, JP-A-2002-179668, JP-A-2002-179669, JP-A-2002-179670, and JP-A-2002.
• chiral agent examples include compounds represented by the following formula (12).
• X is 2 to 5 (integer).
• the content of the chiral agent is preferably 0.01 mol% to 200 mol%, more preferably 1 mol% to 30 mol% of the amount of the polymerizable liquid crystal compound. ..
• the liquid crystal composition of the present invention may contain a polymerization initiator.
• the polymerization reaction suitable for the present invention is a thermal polymerization reaction using a thermal polymerization initiator and a photopolymerization reaction using a photopolymerization initiator, and the photopolymerization reaction is more preferable.
• photopolymerization initiators include ⁇ -carbonyl compounds (described in US Pat. Nos. 2,376,661 and 236,670), acidoin ethers (described in US Pat. No. 2,448,828), and ⁇ -hydrogen-substituted aromatic acidoines. Compounds (described in US Pat. No.
• the content of the polymerization initiator is preferably 0.01 to 20% by mass with respect to the total mass of the solid content of the liquid crystal composition. It is more preferably 4 to 8% by mass.
• the cured product of the present invention is a cured product obtained by polymerizing the above-mentioned liquid crystal composition of the present invention.
• the cured product of the present invention can be used as an optically anisotropic layer.
• This optically anisotropic layer is a layer formed by orienting a polymerizable liquid crystal compound (polymerizable rod-shaped liquid crystal compound or polymerizable disk-shaped liquid crystal compound) and then fixing the layer by polymerization. It is no longer necessary to show liquid crystallinity.
• the film of the present invention is a film containing at least one of the cured products of the present invention described above. Further, the film of the present invention is a film obtained by immobilizing the cholesteric liquid crystal phase of the liquid crystal composition of the present invention described above.
• the film of the present invention can be formed by forming a film of the liquid crystal composition of the present invention by a method such as coating.
• An optically anisotropic element can also be produced by applying a liquid crystal composition on an alignment film described later to form a liquid crystal layer.
• the liquid crystal composition can be applied by a known method (for example, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, a die coating method, a bar coating method, etc.).
• the liquid crystal molecules are preferably fixed while maintaining an oriented state.
• the immobilization is preferably carried out by a polymerization reaction of the polymerizable group introduced into the liquid crystal molecule.
• the method for polymerizing the liquid crystal composition of the present invention is preferably photopolymerization by irradiating the above-mentioned photopolymerization initiator with light, and it is preferable to use ultraviolet rays as a light source.
• the irradiation energy is preferably from 5mJ / cm 2 ⁇ 100J / cm 2, more preferably from 30 ⁇ 600mJ / cm 2, more preferably 100 ⁇ 400mJ / cm 2.
• light irradiation may be carried out under heating conditions.
• the thickness of the liquid crystal layer is preferably 0.1 to 50 ⁇ m, more preferably 0.3 to 20 ⁇ m, and most preferably 1 to 10 ⁇ m.
• the coating amount of the compound of the present invention contained in the liquid crystal composition (that is, the coating film) forming the liquid crystal layer is preferably 0.005 to 0.5 g / m 2, preferably 0.01 to 0.45 g / m 2. It is more preferably m 2 , more preferably 0.02 to 0.4 g / m 2 , and most preferably 0.03 to 0.35 g / m 2.
• the alignment film can be a rubbing treatment of an organic compound (preferably a polymer), an oblique deposition of an inorganic compound, formation of a layer having microgrooves, or an organic compound (eg, ⁇ -tricosan) by the Langmuir-Blojet method (LB film). It can be provided by means such as accumulation of acid, dioctadecylmethylammonium chloride, methyl stearylate, etc.). Further, an alignment film in which an alignment function is generated by applying an electric field, applying a magnetic field, or irradiating light is also known. Among these, a photoalignment film in which an alignment function is generated by light irradiation is preferable.
• the rubbing treatment is carried out by rubbing the surface of the polymer layer with paper or cloth several times in a certain direction.
• the type of polymer used for the alignment film is determined according to the orientation of the liquid crystal molecules (particularly the average tilt angle). In order to orient the liquid crystal molecules horizontally (average inclination angle: 0 to 50 °), a polymer that does not reduce the surface energy of the alignment film (ordinary polymer for alignment film) is used. In order to orient the liquid crystal molecules vertically (average inclination angle: 50 to 90 °), a polymer that reduces the surface energy of the alignment film is used. In order to reduce the surface energy of the alignment film, it is preferable to introduce a hydrocarbon group having 10 to 100 carbon atoms in the side chain of the polymer.
• the thickness of the alignment film is preferably 0.01 to 5 ⁇ m, more preferably 0.05 to 1 ⁇ m.
• the liquid crystal molecules of the optically anisotropic layer may be oriented using the alignment film, and then the liquid crystal layer may be transferred onto the transparent support.
• the liquid crystal molecules fixed in the oriented state can maintain the oriented state even without the alignment film. Further, when the average inclination angle is less than 5 °, it is not necessary to perform the rubbing treatment and the alignment film is not required.
• an alignment film (described in JP-A-9-152509) that forms a chemical bond with the liquid crystal molecule at the interface may be used.
• the alignment film is used for the purpose of improving the adhesion, it is not necessary to carry out the rubbing treatment.
• the liquid crystal layer formed on the transparent support can function as an alignment film of the liquid crystal layer provided on the transparent support.
• the film of the present invention and the optically anisotropic element having the film of the present invention may have a transparent support.
• a transparent support a glass plate or a polymer film, preferably a polymer film is used.
• the support is transparent, it means that the light transmittance is 80% or more.
• an optically isotropic polymer film is generally used.
• the optical isotropic property means that the in-plane retardation (Re) is preferably less than 10 nm, and more preferably less than 5 nm.
• the retardation (Rth) in the thickness direction is preferably less than 10 nm, more preferably less than 5 nm.
• the in-plane retardation (Re) and the thickness direction retardation (Rth) of the transparent support are defined by the following equations, respectively.
• Re (nx-ny) d
• Rth [ ⁇ (nx + ny) / 2 ⁇ -nz]
• nx and ny are the in-plane refractive indexes of the transparent support
• nz is the refractive index in the thickness direction of the transparent support
• d is. The thickness of the transparent support.
• the transparent support preferably has optical uniaxiality or optical biaxiality.
• optical uniaxiality even if it is optically positive (the refractive index in the optical axis direction is larger than the refractive index in the direction perpendicular to the optical axis), it is negative (the refractive index in the optical axis direction is on the optical axis). It may be smaller than the refractive index in the vertical direction).
• refractive indexes nx, ny and nz of the above equation all have different values (nx ⁇ ny ⁇ nz).
• the in-plane retardation (Re) of the optically anisotropic transparent support is preferably 10 to 1000 nm, more preferably 15 to 300 nm, and most preferably 20 to 200 nm.
• the thickness direction retardation (Rth) of the optically anisotropic transparent support is preferably 10 to 1000 nm, more preferably 15 to 300 nm, and even more preferably 20 to 200 nm.
• the material for forming the transparent support is determined according to whether it is an optically isotropic support or an optically anisotropic support.
• an optically isotropic support glass or cellulose ester is generally used.
• optically anisotropic supports synthetic polymers (eg, polycarbonate, polysulfone, polyethersulfone, polyacrylate, polymethacrylate, norbornene resin) are generally used.
• synthetic polymers eg, polycarbonate, polysulfone, polyethersulfone, polyacrylate, polymethacrylate, norbornene resin
• the transparent support made of a polymer film is preferably formed by a solvent casting method.
• a stretching treatment on the polymer film In order to obtain an optically anisotropic transparent support, it is preferable to carry out a stretching treatment on the polymer film.
• a normal uniaxial stretching treatment or biaxial stretching treatment may be performed.
• an optical biaxial support it is preferable to carry out an unbalanced biaxial stretching treatment.
• unbalanced biaxial stretching the polymer film is stretched at a constant magnification (eg, 3-100%, preferably 5-30%) in one direction and at a higher magnification (eg, 6-200%, preferably 6-30%) in the direction perpendicular to it. 10-90%) Stretch.
• the bidirectional stretching treatment may be carried out at the same time.
• the stretching direction (the direction in which the stretching ratio is high in unbalanced biaxial stretching) and the in-plane slow-phase axis of the film after stretching are substantially the same direction.
• the angle between the stretching direction and the slow axis is preferably less than 10 °, more preferably less than 5 °, and most preferably less than 3 °.
• the thickness of the transparent support is preferably 10 to 500 ⁇ m, more preferably 50 to 200 ⁇ m.
• the transparent support is surface-treated (eg, glow discharge treatment, corona discharge treatment, ultraviolet rays (eg, glow discharge treatment, corona discharge treatment, ultraviolet rays). UV) treatment, flame treatment) may be carried out.
• An ultraviolet absorber may be added to the transparent support.
• An adhesive layer undercoat layer
• the thickness of the adhesive layer is preferably 0.1 to 2 ⁇ m, more preferably 0.2 to 1 ⁇ m.
• the transparent support may be peeled off after the film is formed.
• the film of the present invention can be used as a layer exhibiting selective reflection characteristics with respect to light in a predetermined wavelength range.
• the layer (cholesteric liquid crystal layer) formed by fixing the cholesteric liquid crystal phase selectively reflects either right-handed circularly polarized light or left-handed circularly polarized light in the selective reflection wavelength range, and transmits the circularly polarized light of the other sense. It functions as a circularly polarized light selective reflection layer.
• a film containing one or more cholesteric liquid crystal layers can be used for various purposes.
• each cholesteric liquid crystal layer In a film containing two or more cholesteric liquid crystal layers, the sense of circularly polarized light reflected by each cholesteric liquid crystal layer may be the same or vice versa depending on the application. Further, the center wavelength of the selective reflection described later of each cholesteric liquid crystal layer may be the same or different depending on the application.
• the term "sense” for circularly polarized light means whether it is right-handed circularly polarized light or left-handed circularly polarized light.
• the sense of circularly polarized light is right-handed circularly polarized light when the tip of the electric field vector turns clockwise as time increases when viewed as the light travels toward you, and left when it turns counterclockwise. Defined as circularly polarized light.
• the term “sense” may be used for the twisting direction of the spiral of the cholesteric liquid crystal.
• a film containing a cholesteric liquid crystal layer exhibiting selective reflection characteristics in the visible light wavelength range can be used as a screen and a half mirror for displaying a projected image. Further, by controlling so as to exhibit selective reflection characteristics in the infrared wavelength region, it can be used as a heat shield film or as an infrared cut filter for a sensor.
• the reflective layer can be used for various purposes such as a polarizing element, a reflective film, an antireflection film, a viewing angle compensating film, a holography, and an alignment film, which are constituent elements of an optical element.
• the projected image may be displayed on the surface of the projected image display member and visually recognized as such, or may be a virtual image that appears above the projected image display member when viewed from the observer.
• the central wavelength ⁇ of the selective reflection of the cholesteric liquid crystal layer means a wavelength at the center of gravity of the reflection peak of the circularly polarized reflection spectrum measured from the normal direction of the cholesteric liquid crystal layer.
• the center wavelength of selective reflection can be adjusted by adjusting the pitch of the spiral structure.
• the central wavelength ⁇ is adjusted to make an apparent selection.
• the central wavelength of reflection can be in the wavelength range of 450 to 495 nm.
• the apparent center wavelength of selective reflection is the wavelength at the center of gravity of the reflection peak of the circularly polarized reflection spectrum of the cholesteric liquid crystal layer measured from the observation direction during practical use (when used as a projected image display member). means. Since the pitch of the cholesteric liquid crystal phase depends on the type of chiral agent used together with the liquid crystal compound or the concentration thereof added, a desired pitch can be obtained by adjusting these.
• a cholesteric liquid crystal layer having an apparent center wavelength of selective reflection is produced in each of the red light wavelength region, the green light wavelength region, and the blue light wavelength region, and by laminating them, a full-color projected image can be displayed. It is possible to manufacture a possible projection image display member.
• the projection image display member can be used as a half mirror for displaying a projected image of a head-up display by having a structure that is transparent to light in the visible light region.
• the projected image display half mirror can visually display the image projected from the projector, and is on the opposite side when the projected image display half mirror is observed from the same side on which the image is displayed. Information or landscape can be observed at the same time.
• Compound (A-501) was synthesized by the following route.
• Examples 1 to 29 and Comparative Example 1 As shown in Table 1 below, the compound of the present invention was used as a liquid crystal alignment accelerator to form an optically anisotropic film and evaluated.
• a coating liquid having the following composition was prepared.
• the concentration of the liquid crystal alignment accelerator is 0.02 parts by mass, 0.03 parts by mass, 0.10 parts by mass, and 0.20 parts by mass with respect to 100 parts by mass in total of the rod-shaped liquid crystal compound.
• Each coating liquid was prepared.
• the film thickness of the optically anisotropic film was about 4 ⁇ m.
• the formed optically anisotropic film showed selective reflectivity of green derived from cholesteric. When the reflection wavelength was measured with a Shimadzu UVPC-3000, the center wavelength was 530 nm.
• each optically anisotropic film produced was evaluated visually and by haze.
• the haze was measured using a haze meter NDH2000 manufactured by Nippon Denshoku Co., Ltd.
• the haze values of the above were compared, and the dissolution / orientation promoting action was evaluated according to the following criteria. The results are shown in Table 1 below. Those with a high evaluation indicate that the solubility is good and the orientation promoting action is also large. Those with a low rating mainly indicate low solubility.
• the compound of the present invention has a large liquid crystal alignment action and high solubility in a solvent even at a high concentration. Further, it was confirmed that the compound of the present invention has a wide range of application of the coating solvent and is highly suitable for use.
• Examples 30 to 32 As shown in Table 2 below, the compound of the present invention was used as a liquid crystal alignment accelerator to form an optically anisotropic film and evaluated.
• a coating liquid having the following composition was prepared.
• the concentrations of the liquid crystal alignment accelerator were 0.02 parts by mass, 0.03 parts by mass, 0.10 parts by mass, 0.20 parts by mass, and 0.
• Each coating liquid was prepared by adjusting the content to 30 parts by mass.
• Alignment film interface alignment agent 1 Alignment film interface alignment agent 1
• the prepared coating liquid was weighed using a micropipettor, dropped onto glass with an alignment film (PVA-103), and spin-coated.
• An optically anisotropic film was formed by heating at 110 ° C. for 2 minutes, allowing it to cool for 1 minute, and then irradiating it with ultraviolet rays (ultraviolet intensity: 500 mJ / cm 2) in a nitrogen atmosphere.
• the film thickness of the optically anisotropic film was about 1.1 ⁇ m.
• the orientation of each optically anisotropic film produced was evaluated visually and by haze. The haze was measured using a haze meter NDH2000 manufactured by Nippon Denshoku Co., Ltd.
• the compound of the present invention has a large liquid crystal orientation effect and has a large liquid crystal orientation effect with respect to the solvent even when the concentration is high. It was confirmed that the solubility was high. Therefore, it was confirmed that the compound of the present invention has a wide range of application of the coating solvent and is highly suitable for use.

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