WO2005014522A1 - 重合性液晶化合物、液晶組成物及び光学異方性材料 - Google Patents
重合性液晶化合物、液晶組成物及び光学異方性材料 Download PDFInfo
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- WO2005014522A1 WO2005014522A1 PCT/JP2004/011560 JP2004011560W WO2005014522A1 WO 2005014522 A1 WO2005014522 A1 WO 2005014522A1 JP 2004011560 W JP2004011560 W JP 2004011560W WO 2005014522 A1 WO2005014522 A1 WO 2005014522A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3833—Polymers with mesogenic groups in the side chain
- C09K19/3842—Polyvinyl derivatives
- C09K19/3852—Poly(meth)acrylate derivatives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
- C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
Definitions
- the present invention relates to a polymerizable liquid crystal compound suitably used for an optical element such as a diffraction element or a phase plate used for laser light having a wavelength of 300 to 450 nm, a liquid crystal composition containing the compound, and a liquid crystal composition containing the compound.
- the present invention relates to an optically anisotropic material using
- a liquid crystal having a polymerizable functional group (hereinafter, referred to as a polymerizable liquid crystal compound) has both properties as a polymerizable monomer and properties as a liquid crystal. Therefore, when the polymerization reaction is performed after the polymerizable liquid crystal compound is oriented, an optically anisotropic material in which the orientation of the liquid crystal is fixed can be obtained.
- a photopolymerizable liquid crystal having a photopolymerizable functional group is an excellent compound that can easily produce an optically anisotropic material by being irradiated with light and polymerized.
- the optically anisotropic material has an optical anisotropy such as a refractive index anisotropy derived from a mesogen skeleton, and is applied to an optical element such as a diffraction element or a phase plate by utilizing the property.
- an optically anisotropic material for example, a compound represented by the following formula (4) (where Q is a 1,4-phenylene group or trans-1,4-cyclohexylene , And Z is an alkyl group.)
- Q is a 1,4-phenylene group or trans-1,4-cyclohexylene
- Z is an alkyl group.
- a diffraction element such as a polarization hologram or an optically anisotropic material for a phase plate.
- In-plane optical characteristics (such as retardation value) must be uniform.
- Patent Document 1 JP-A-10-195138
- a material having high refractive index anisotropy is required to achieve miniaturization and high efficiency of the device.
- a material having a high refractive index anisotropy tends to have a high refractive index.
- the high refractive index material generally has the following properties.
- a material having a large refractive index wavelength dispersion tends to have a large light absorption for light having a short wavelength (that is, a material having a large molar extinction coefficient).
- the conventional materials cannot satisfy the characteristics required for an optically anisotropic material for blue laser light, and have a problem that the durability is particularly insufficient.
- the present invention has been made to solve the above problems, and satisfies the characteristics required for an optically anisotropic material, and particularly has high durability against laser light having a wavelength of 300 to 450 nm.
- a polymerizable liquid crystal compound a liquid crystal composition containing the compound, and an optically anisotropic material using the liquid crystal composition. That is, the present invention provides the following inventions.
- a polymerizable liquid crystal compound which is an acrylic acid derivative represented by the following formula (1):
- the symbols in the formula have the following meanings.
- R 1 hydrogen atom or methyl group.
- R 2 an alkyl group having 118 carbon atoms.
- a hydrogen atom in the group may be substituted with a fluorine atom, a chlorine atom or a methyl group.
- CH 2 CR 1 -COO-( ⁇ /)-OCO-Cy-X 1 -R 2 (1)
- a liquid crystal composition comprising two or more polymerizable liquid crystal compounds according to ⁇ 1> or ⁇ 2>.
- a liquid crystal composition comprising the polymerizable liquid crystal compound according to ⁇ 1> or ⁇ 2> and a polymerizable liquid crystal compound that is an atalylic acid derivative represented by the following formula (2): .
- the symbols in the formula have the following meanings.
- R 3 a hydrogen atom or a methyl group.
- Cy trans-1,4-cyclohexylene group.
- a hydrogen atom in the group may be substituted by a fluorine atom, a chlorine atom or a methyl group.
- R 4 an alkyl group having 118 carbon atoms.
- the symbols in the formula have the following meanings.
- R 5 a hydrogen atom or a methyl group.
- Cy trans-1,4-cyclohexylene group.
- a hydrogen atom in the group may be substituted by a fluorine atom, a chlorine atom or a methyl group.
- R 6 an alkyl group having 118 carbon atoms.
- ⁇ 7> An optically anisotropic material obtained by polymerizing by irradiating ultraviolet light or visible light in a state where the liquid crystal composition according to any one of ⁇ 3> to ⁇ 6> is oriented.
- an optically anisotropic material having high durability to laser light having a wavelength of 300 to 450 nm.
- FIG. 1 is a view showing an infrared absorption spectrum of a compound (1A-a3) in an example.
- FIG. 2 is a view showing an infrared absorption spectrum of a compound (IA_a5) in an example.
- the polymerizable liquid crystal compound represented by the formula (1) is also referred to as a compound (1).
- the wavelength includes the range of the described value ⁇ 5 nm.
- the polymerizable liquid crystal compound of the present invention is a compound represented by the following formula (1).
- CH 2 CR 1 -COO-( ⁇ /)-OCO-Cy-X 1 -R 2 (1)
- R 1 is a hydrogen atom or a methyl group, and is preferably a hydrogen atom. It is preferable that R 1 be a hydrogen atom because the polymerization reaction proceeds rapidly when a liquid crystal composition containing the compound (1) described below is photopolymerized to obtain an optically anisotropic material. Another advantage is that the in-plane distribution of the retardation, in which the characteristics of the optically anisotropic material are less affected by the external environment such as temperature, is small.
- R 2 is an alkyl group having 18 to 18 carbon atoms, preferably an alkyl group having 2 to 6 carbon atoms.
- the carbon number of R 2 is in the above range.
- R 2 preferably has a straight-chain structure, since the temperature range in which the compound (1) exhibits liquid crystallinity can be widened.
- Cy is a trans-1,4-cyclohexylene group.
- X 1 is a 1,4-phenylene group or a trans-1,4-cyclohexylene group.
- X 1 is a 1,4-phenylene group
- two of the three ring groups contained in the compound (1) are a 1,4-phenylene group. Therefore, it is more stable to blue laser light than a compound in which all three ring groups are 1,4 phenylene groups, and has a refractive index compared to a compound having only one 1,4 phenylene group.
- Optical anisotropy such as anisotropy increases. Therefore, even when preparing a liquid crystal composition for a diffraction element that requires a particularly large retardation value, the force S to obtain a desired optical anisotropy becomes easy.
- X 1 is trans - 1
- the stability of compound (1) to blue laser light can be further improved, and the nematic phase-isotropic phase transition point can be increased.
- the 1,4-phenylene group and the trans-1,4-cyclohexylene group in the compound (1) may be a hydrogen atom bonded to a carbon atom in the group, which may be an unsubstituted group. May be substituted by a fluorine atom, a chlorine atom or a methyl group. It is preferably an unsubstituted group from the viewpoint that the nematic phase-isotropic phase transition point of the compound (1) can be increased.
- the following compound (1A) wherein R 1 is a hydrogen atom is preferable.
- Specific examples of the compound (1) include the following compounds. Among these, the following compounds (1A-a2)-(1A-a6) and the following compounds (1A-b2)-(1A-b6) are preferable.
- Cy has the same meaning as described above.
- Ph represents a 1,4-phenylene group, and a hydrogen atom in the group may be substituted with a chlorine atom, a fluorine atom, or a methyl group. Cy and Ph are preferably unsubstituted groups. Further, when a structurally isomeric group is present in the alkyl group in the following formula, all the groups are included, and a linear alkyl group is preferred.
- CH CH-C ⁇ 0_ Ph-OCO--Cy_Cy--CH (lA-b4)
- CH CH-COO-Ph- -OCO-Cy- -Cy--CH (1A--b5)
- CH C (CH J -Ph.- - ⁇ c ⁇ -"Cy- -Ph- C 1B- -a2)
- CH C (CH J1 ⁇ -Ph.- - ⁇ - ⁇ - "Cy- -Ph- C
- CH C (CH J- ⁇ -Ph.- - ⁇ - ⁇ -Cy- -Ph- C H (1B- -a6)
- CH C (CH) -COO--Ph- -Cy- -Cy--C H
- Compound (1) of the present invention can be synthesized, for example, by the following method.
- the compound (1) of the present invention has good durability against blue laser light due to its structure having three ring groups.
- a -Ph-CO- structure and having a cyclic saturated hydrocarbon group Cy that does not absorb light even in the short wavelength region of 400 nm or less light in the wavelength range of blue laser light can be obtained. Low absorption.
- relatively large optical anisotropy such as refractive index anisotropy can be exhibited.
- the compound (1) it is possible to provide an optically anisotropic material having sufficient light resistance to blue laser light and having excellent properties such as retardation.
- Compound (1) itself has a sufficiently wide liquid crystal temperature range, and in particular, has a characteristic that the temperature range in which a liquid crystal phase is displayed is wide on a high temperature side.
- a liquid crystal composition having desired characteristics is preferably mixed with another polymerizable liquid crystal compound so as to exhibit liquid crystallinity even at a low temperature side.
- Use of multiple types of polymerizable liquid crystal compounds in combination causes a drop in the crystal-nematic phase transition point of the liquid crystal composition.Therefore, handle the composition in a liquid crystal phase or isotropic phase without using high-temperature equipment. Can be.
- the liquid crystal composition of the present invention may be a composition containing two or more compounds (1).
- a composition containing the compound (1) and a polymerizable liquid crystal compound other than the compound (1) may be used.
- the other polymerizable liquid crystal compound the following compound (2) or the following compound (3), which is preferably an acrylic acid derivative, is preferable.
- R 3 and R 5 are each independently a hydrogen atom or a methyl group, and preferably a hydrogen atom.
- R 4 and R 6 are each independently an alkyl group having 18 to 18 carbon atoms, and preferably a linear alkyl group having 2 to 6 carbon atoms. Cy has the same meaning as described above, and is preferably an unsubstituted group.
- the liquid crystal composition of the present invention contains two or more compounds (1)
- the liquid crystal composition contains two or more compounds having the same mesogenic structure portion and different R 2 carbon numbers.
- at least one selected from compounds in which R 2 is a linear alkyl group having 2 to 4 carbon atoms and at least one selected from compounds in which R 2 is a linear alkyl group having 5 to 8 carbon atoms.
- the compound contains a compound in which R 2 is an n-propyl group, and a compound in which R 2 is an n-pentyl group.
- the total ratio of the compound (1), the compound (2), and the compound (3) contained in the liquid crystal composition is 25 to 100% by mass relative to the whole liquid crystal composition, and 40 to 100% by mass. Is preferably 60 to 100% by mass.
- the ratio is high, the wavelength dispersion of the refractive index is small and a stable retardation value can be obtained.
- the content of compound (1) is 40 to 100% of the total polymerizable liquid crystal compound. Preferably it is 100 mol% 70 It is preferably 100 mol%.
- the total content of the compound (2) and the compound (3) is preferably at most 60 mol%, more preferably at most 30 mol%, based on the total polymerizable liquid crystal compound.
- the ratio of compound (2) contained in the total polymerizable liquid crystal compound is 50 mol% or less preferable.
- the liquid crystal composition of the present invention may contain a compound other than the compound (1), the compound (2), and the compound (3). It is preferable to select other compounds depending on the application, required performance, and the like. For example, components that exhibit liquid crystallinity at low temperatures, low-viscosity components for low temperatures, components that adjust the absolute refractive index and refractive index anisotropy, components that improve the dielectric anisotropy, and components that impart cholesteric properties In addition, a polymerizable or non-polymerizable light stabilizer and other various additives can be appropriately mixed.
- the following compounds (A) manufactured by Asahi Denka Co., product number: LA87
- the following compounds (B) manufactured by Asahi Denka Co., product number : LA82
- the non-polymerizable light stabilizer include the following compound (C) (manufactured by Asahi Denka Co., Ltd., product number: LA77), and LA62 and LA67 manufactured by Asahi Denka Co., Ltd.
- any of these light stabilizers can improve durability against blue laser light with an addition amount that does not deteriorate the properties of the optically anisotropic material.
- the addition amount of the light stabilizer is preferably 0.2 to 2% by mass based on the whole liquid crystal composition.
- the other compound is any of a polymerizable liquid crystal compound other than the compound (1), the compound (2), and the compound (3), a polymerizable non-liquid crystal compound, a non-polymerizable liquid crystal compound, and a non-polymerizable non-liquid crystal compound. May be present, or a single or a plurality thereof may be combined.
- the other compound is a polymerizable liquid crystal compound having high durability against blue laser light other than the compound (1), the compound (2), and the compound (3)
- the ratio in the liquid crystal composition is determined by the total polymerizable compound. It is preferably at most 60 mol% with respect to the liquid crystal compound, and more preferably at most 25 mol%.
- polymerizable non-liquid The total proportion of the crystalline compound, the non-polymerizable liquid crystal compound, and the non-polymerizable non-liquid crystal compound is preferably 10% by mass or less, particularly preferably 5% by mass or less, based on the liquid crystal composition.
- R 7 in the formula represents an alkyl group having 118 carbon atoms.
- the group includes all structurally isomer groups, and a group having a linear structure is preferred.
- Cy and Ph have the same meanings as described above, and each is preferably an unsubstituted group.
- the value of the refractive index anisotropy is balanced with the temperature range showing the liquid crystal phase.
- the compounds (5dl)-(5d8) have the advantage that the value of the refractive index anisotropy is relatively large, and the compounds (5el)-(5e8) have the advantage that the temperature range showing the liquid crystal phase is wide.
- optically anisotropic material of the present invention will be described.
- the optically anisotropic material of the present invention is obtained by polymerizing the liquid crystal composition.
- the polymerization method include a photopolymerization method and a thermal polymerization method, and a photopolymerization method is preferable.
- the light used in the photopolymerization method is preferably ultraviolet light or visible light. In the case of photopolymerization, efficient polymerization can be achieved by using a photopolymerization initiator.
- photopolymerization initiator acetophenones, benzophenones, benzoins, benzyls, Michler's ketones, benzoin alkyl ethers, benzyldimethyl ketals, thioxanthones, and the like can be preferably used.
- One or two or more photopolymerization initiators can be used.
- the amount of the photopolymerization initiator to be used is preferably 0.1 to 10% by mass relative to the whole liquid crystal composition, and particularly preferably 0.3 to 2% by mass.
- the liquid crystal composition is polymerized in an oriented state.
- the term "polymerize in an oriented state” means that the liquid crystal composition is sandwiched between supports, and polymerized in a state where the liquid crystal composition shows a liquid crystal phase and a state in which the liquid crystal is oriented.
- a support of the polymerizable liquid crystal composition a support obtained by subjecting a glass or plastic substrate to an alignment treatment is preferable.
- the orientation treatment is performed by laminating a polyimide orientation film on the substrate surface by directly rubbing the substrate surface with natural fibers such as cotton and wool, and synthetic fibers such as nylon and polyester. Fiber etc.
- a spacer such as glass beads is disposed on the surface of the support on which the orientation treatment has been performed, and a plurality of supports are controlled to have a desired interval to face each other, thereby producing a cell.
- the liquid crystal composition is filled between the supports constituting the cell, and a polymerization reaction is performed.
- the ambient temperature In order to maintain the liquid crystal composition in a state of exhibiting a liquid crystal phase, the ambient temperature must be changed from the crystal to nematic phase transition.
- optically anisotropic material produced by the above method may be used while being sandwiched between supports, or may be peeled off from the support and used by being supported on another substrate.
- the optically anisotropic material of the present invention has high durability against blue laser light, it is suitable for a diffraction element (such as a polarization hologram) for blue laser light or an optical element such as a phase plate.
- a diffraction element such as a polarization hologram
- an optical element such as a phase plate.
- a polarization hologram there is an example in which light emitted from a laser light source is reflected by an information recording surface of an optical disc to separate signal light generated and guided to a light receiving element.
- the phase plate is used as a 1/2 wavelength plate to control the phase difference of the light emitted from the laser light source, and the quarter wave plate is installed in the optical path to stabilize the output of the laser light source.
- Example 1 is an example, and Example 8 is a comparative example.
- a mixture of compound (d_l) (4.4 g, 0.017 mol), dichloromethane (70 mU, and triethylamine (2.5 g, 0.025 mol)) does not exceed a reaction solution temperature of 20 ° C.
- the filtrate was purified by column chromatography (developing solution: dichloromethane / toluene).
- the transition temperature from the crystal of the compound (1A-a3) to the nematic phase is 113 ° C, and the transition temperature from the nematic phase to the isotropic phase is 198 ° C (outside value).
- the ⁇ for one laser beam at a wavelength of 589 nm was 0.18 (outside value).
- FIG. 1 shows the infrared absorption spectrum of the compound (1A-a3).
- the measurement results of the 1 H NMR spectrum of the compound (1A-a3) are shown below.
- Example 2 Synthesis example of compound (1A-a5) [0058] The reaction was carried out in the same manner as in Example 1-1, except that compound (d-1) was changed to the following compound (d-2), to give compound (IA_a5) (5.04 g). The yield was 70.5%.
- FIG. 2 shows the infrared absorption spectrum of the compound (1A-a5). The results of measuring the 1 HNMR spectrum of the compound (IA_a5) are shown below.
- Example 1 The compound (1A-a3) obtained in Example 1 and the following compound (2-5) were mixed at a molar ratio of 1: 1 to prepare a liquid crystal composition A.
- the liquid crystal composition A showed a nematic phase in a supercooled state at room temperature.
- the phase transition temperature from the nematic phase to the isotropic phase was 154 ° C or higher.
- a photopolymerization initiator was added to the liquid crystal composition A, and 0.5% by mass and 1.0% by mass were added to the liquid crystal composition A, respectively, to obtain a liquid crystal composition Al and a liquid crystal composition A2.
- a photopolymerization initiator was added to the liquid crystal composition A, and 0.5% by mass and 1.0% by mass were added to the liquid crystal composition A, respectively, to obtain a liquid crystal composition Al and a liquid crystal composition A2.
- the liquid crystal composition A1 obtained in Example 3-1 was injected into the cell at 100 ° C.
- Slight 80 ° C, Te, ultraviolet integrated light amount of intensity 80 mW / cm 2 is irradiated so as to be 5300mj / cm 2 to form a layer of optically anisotropic material performing photopolymerization, the optical element A1 Obtained.
- the optically anisotropic material was horizontally oriented along the rubbing direction.
- Optical element A1 was transparent in the visible region, and no scattering was observed. Further, ⁇ with respect to a laser beam having a wavelength of 589 nm was 0.055.
- the magnitude of the refractive index anisotropy of the exposed surface after the test was measured, the decrease in ⁇ after the test with respect to ⁇ before the test was less than 1%, indicating that the optical element A1 was less durable against blue laser light. We confirmed that it was excellent.
- Pitch 9 beta m on a glass plate having a rectangular grid of depth 3 beta m, the polyimide was coated by a spin coater as an alignment agent, after heat treatment, subjected to rubbing treatment in a grid parallel direction with a nylon cloth, a support was prepared.
- a glass plate that was similarly subjected to the orientation treatment was bonded using an adhesive so that the orientation-treated surfaces faced each other, thereby producing a cell. At that time, the orientation directions were made parallel.
- the liquid crystal composition A2 obtained in Example 3-1 was injected into this cell at 100 ° C. Next, photopolymerization was performed by irradiating an ultraviolet ray having an intensity of 40 mWZ cm 2 at 90 ° C. for 3 minutes. A quarter-wave plate was laminated on one side of this cell to produce a polarization hologram beam splitter. When this device was used as an optical head, it was 27 for laser light with a wavelength of 650 nm. / 0 light utilization efficiency was obtained.
- Example 2 The compound (1A-a3) obtained in Example 1 and the compound (1A-a5) obtained in Example 2 are mixed at a ratio of 1: 1 (molar ratio). Thus, a liquid crystal composition B was obtained.
- the liquid crystal composition B showed a nematic phase in a supercooled state at room temperature.
- the phase transition temperature from the nematic phase to the isotropic phase was 200 ° C or more.
- a photopolymerization initiator was added to the liquid crystal composition B in an amount of 0.5% by mass based on the liquid crystal composition B to obtain a liquid crystal composition B1.
- a cell was prepared in the same manner as in Example 3_2 except that the distance between the supports was set to 3.2 xm.
- the liquid crystal composition B1 was injected into this cell at 100 ° C. Then, at a temperature 70 ° C, the ultraviolet intensity of 60 mW / cm 2, was irradiated as the accumulated light quantity is 5000 mJ / cm 2 Te Gyotsu photopolymerization to form a layer of optically anisotropic material, an optical Element B1 was obtained.
- the optically anisotropic material was horizontally oriented in the rubbing direction of the substrate.
- Optical element B1 was transparent in the visible region, and no scattering was observed. ⁇ with respect to the laser beam having a wavelength of 589 nm was 0.07.
- the optical element B1 obtained in Example 4_2 was subjected to a blue laser light exposure acceleration test in the same manner as in Example 3-3, except that the integrated exposure energy was 26 W'hour / mm 2 .
- the decrease in ⁇ after the test with respect to ⁇ before the accelerated test was less than 1%, and it was confirmed that the optical element B1 was excellent in durability against blue laser light.
- a cell was produced in the same manner as in Example 3-2, except that a glass plate on which an antireflection film for blue light was laminated was used as the glass plate, and the distance between the supports was 1 ⁇ .
- the liquid crystal composition B1 was injected into the cell, and a photopolymerization reaction was performed to form an optically anisotropic material layer.
- one side of the support was peeled off, and a rectangular structure having a pitch of 20 ⁇ m and a depth of 1 ⁇ m was formed on the optically anisotropic material by photolithography and dry etching.
- the rectangular concave portion was filled with a transparent resin having a refractive index of 1.57 with respect to a laser beam having a wavelength of 405 nm (a transparent resin having a refractive index equivalent to the ordinary light refractive index of an optically anisotropic material).
- a transparent resin having a refractive index equivalent to the ordinary light refractive index of an optically anisotropic material was placed on top of the optically anisotropic material layer, and the periphery was bonded using an adhesive to produce an optical element B2.
- 97% or more of the 0th-order light was transmitted for ordinary light (about 0.5% of the first-order light was transmitted). For light, the ratio of the zero-order light and the Zl-order light is 11, Was obtained.
- liquid crystal composition C The compound (1A-a3) obtained in Example 1, the compound (1A-a5) obtained in Example 2, the following compound (3_A_3), and the following compound (3_A_5) in a ratio of 1: 1: 1: 1 (molar ratio) And liquid crystal composition C was obtained.
- the liquid crystal composition C showed a nematic phase in a supercooled state at room temperature.
- the nematic phase transition temperature to the isotropic phase was 140 ° C.
- liquid crystal composition C was added with a photopolymerization initiator in an amount of 0.5% by mass based on the liquid crystal composition C to obtain a liquid crystal composition C1.
- Example 5-2 Example of manufacturing optical element (part 3)
- a cell was produced in the same manner as in Example 3-2 except that the distance between the supports was 4.7 ⁇ ⁇ .
- the liquid crystal composition C1 obtained in Example 5-1 was injected into this cell at 70 ° C.
- ultraviolet light having an intensity of 50 mWZcm 2 was irradiated so that the integrated light amount became 4500 mj / cm 2 to perform photopolymerization to form a layer of an optically anisotropic material. Obtained.
- the optically anisotropic material was horizontally oriented in the rubbing direction of the substrate.
- Optical element C was transparent in the visible region, and no clinging was observed. ⁇ with respect to laser light having a wavelength of 589 nm was 0.03.
- the optical element C obtained in Example 5_2 was subjected to a blue laser light exposure acceleration test in the same manner as in Example 3_3, except that the integrated exposure energy was 40 W'hour / mm 2 .
- the decrease in ⁇ after the test with respect to ⁇ before the accelerated test was less than 1%, and it was confirmed that the optical element C was excellent in durability against blue laser light.
- Example 6-1 Preparation example of liquid crystal composition (Part 4)
- the compound (1A-a3) obtained in Example 1, the compound (1A-a5) obtained in Example 2, the compound (3-A-3), and the compound (3-A-5) were mixed in a ratio of 4: 4: 1. : 1 (molar ratio) to obtain a liquid crystal composition D.
- the liquid crystal composition D showed a nematic phase in a supercooled state at room temperature.
- the phase transition temperature from the nematic phase to the isotropic phase was 148 ° C or higher.
- liquid crystal composition D a photopolymerization initiator was added in an amount of 0.5% by mass based on the liquid crystal composition D to obtain a liquid crystal composition D1.
- Example 6-2 Example of manufacturing optical element (part 4)
- a cell was prepared in the same manner as in Example 3_2 except that the distance between the supports was 4.7 x m.
- the liquid crystal composition D1 obtained in Example 6-1 was injected into this cell at 70 ° C.
- an ultraviolet ray having an intensity of 60 mWZcm was irradiated so that the integrated light amount became 4500 mj / cm to perform photopolymerization to form a layer of an optically anisotropic material, thereby obtaining an optical element D.
- the optically anisotropic material was horizontally oriented in the rubbing direction of the substrate.
- Optical element D was transparent in the visible region, and no scattering was observed.
- ⁇ for laser light of wavelength 589 nm was 0.051
- Example 6-2 For the optical element D obtained in Example 6-2, a blue laser light exposure acceleration test was performed in the same manner as in Example 3-3 except that the integrated exposure energy was set to 50 W'hour / mm 2 . As a result, the decrease in ⁇ after the test relative to ⁇ before the accelerated test was less than 1%, and it was confirmed that the optical element D was excellent in durability against blue laser light.
- Example 4-1 To the liquid crystal composition ⁇ obtained in Example 4-1 was added 0.5% by mass of a polymerizable light stabilizer (manufactured by Asahi Denka Co., Ltd., product number: LA-82) to prepare a liquid crystal composition ⁇ . .
- the liquid crystal composition ⁇ showed a nematic phase in a supercooled state at room temperature, and the phase transition temperature from the nematic phase to the isotropic phase was 200 ° C or more.
- liquid crystal composition E 0.5% by mass of a photopolymerization initiator was added to the liquid crystal composition E to obtain a liquid crystal composition E1.
- Example 7-2 Example of manufacturing optical element (part 5) A cell was produced in the same manner as in Example 3-2 except that the distance between the supports was 4.7 ⁇ ⁇ .
- the liquid crystal composition E1 obtained in Example 7-1 was injected into this cell at 70 ° C.
- ultraviolet light having an intensity of 60 mW / cm 2 was irradiated so that the integrated light amount became 4500 mj / cm 2, and photopolymerization was performed to form a layer of an optically anisotropic material.
- the optically anisotropic material was horizontally oriented in the rubbing direction of the substrate.
- Optical element E was transparent in the visible region, and no scattering was observed. ⁇ with respect to laser light having a wavelength of 589 nm was 0.06.
- Example 7_2 For the optical element ⁇ obtained in Example 7_2, a blue laser light exposure acceleration test was performed in the same manner as in Example 3-3, except that the integrated exposure energy was 40 W'hourZmm 2 . As a result, the decrease in ⁇ after the test relative to ⁇ before the test was less than 1%, and it was confirmed that the optical element ⁇ was excellent in durability against one blue laser beam.
- Example 8-1 Example of liquid crystal composition preparation (part 6)
- the following compound (4a), the following compound (4b), the following compound (4c), and the following compound (4d) were mixed in a ratio of 1: 1: 1: 1 (mass ratio) to prepare a liquid crystal composition F.
- a photopolymerization initiator was added to the liquid crystal composition F in an amount of 0.5% by mass based on the liquid crystal composition F to obtain a liquid crystal composition F1.
- An optical element F was obtained in the same manner as in Example 3-2 except that the liquid crystal composition F1 obtained in Example 8-1 was used.
- the optically anisotropic material was horizontally oriented in the rubbing direction of the substrate.
- the optical element F was transparent in the visible region, and the tongue L was not observed. Further, ⁇ with respect to a laser beam having a wavelength of 589 nm was 0.046.
- a blue laser light exposure acceleration test was performed on the optical element F in the same manner as in Example 3-3 except that the integrated exposure energy was set to 15 W'hour / mm 2 .
- the decrease rate of ⁇ after the test to ⁇ n before the accelerated test was 30%. After the test, the transmittance of the laser beam with a wavelength of 405 nm was reduced to 60% before the test.
- the optically anisotropic material using the compound (1) of the present invention has high durability against blue laser light, and thus is useful as a diffraction element or a phase plate for laser light in the wavelength band. sell.
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- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005513011A JP4826255B2 (ja) | 2003-08-12 | 2004-08-11 | 重合性液晶化合物、液晶組成物及び光学異方性材料 |
| US11/351,011 US7081281B2 (en) | 2003-08-12 | 2006-02-10 | Polymerizable liquid crystal compound, liquid crystal composition and optical anisotropic material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-291935 | 2003-08-12 | ||
| JP2003291935 | 2003-08-12 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/351,011 Continuation US7081281B2 (en) | 2003-08-12 | 2006-02-10 | Polymerizable liquid crystal compound, liquid crystal composition and optical anisotropic material |
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| Publication Number | Publication Date |
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| WO2005014522A1 true WO2005014522A1 (ja) | 2005-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/011560 Ceased WO2005014522A1 (ja) | 2003-08-12 | 2004-08-11 | 重合性液晶化合物、液晶組成物及び光学異方性材料 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7081281B2 (ja) |
| JP (1) | JP4826255B2 (ja) |
| TW (1) | TW200514840A (ja) |
| WO (1) | WO2005014522A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010001868A1 (ja) * | 2008-06-30 | 2010-01-07 | 旭硝子株式会社 | 光学異方性材料、光学素子および光情報記録再生装置 |
| JP2010510256A (ja) * | 2006-11-24 | 2010-04-02 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | シクロヘキシレン反応性メソゲンおよびそれらの用途 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10251861A1 (de) * | 2002-11-07 | 2004-05-19 | Consortium für elektrochemische Industrie GmbH | Polymerisierbare Mischungen |
| JP4725516B2 (ja) * | 2004-06-25 | 2011-07-13 | 旭硝子株式会社 | 重合性液晶化合物、液晶組成物、および光学異方性材料 |
| CN1973325A (zh) * | 2004-06-29 | 2007-05-30 | 旭硝子株式会社 | 液晶光调制元件及光头装置 |
| KR101299785B1 (ko) * | 2005-10-17 | 2013-08-23 | 아사히 가라스 가부시키가이샤 | 중합성 액정 화합물, 액정 조성물, 광학 이방성 재료, 및광학 소자 |
| KR101368046B1 (ko) * | 2005-10-18 | 2014-02-26 | 아사히 가라스 가부시키가이샤 | 액정 광 변조 소자 및 광 헤드 장치 |
| KR20110013353A (ko) * | 2008-05-30 | 2011-02-09 | 아사히 가라스 가부시키가이샤 | 화합물, 중합성 액정성 조성물, 광학 소자 및 광 정보기록 재생 장치 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10195138A (ja) * | 1996-05-20 | 1998-07-28 | Asahi Glass Co Ltd | アクリル酸誘導体化合物およびこれを重合した高分子液晶 |
| JP2001089529A (ja) * | 1999-09-24 | 2001-04-03 | Asahi Glass Co Ltd | アクリル酸誘導体化合物、これを重合した高分子液晶および用途 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858268A (en) * | 1995-06-28 | 1999-01-12 | Ag Technology Co., Ltd. | Liquid crystal optical element, a liquid crystal display element and a projection type liquid crystal display apparatus |
| JP2000221323A (ja) * | 1999-01-28 | 2000-08-11 | Asahi Glass Co Ltd | 高分子液晶を用いてなる位相差板および光ヘッド装置 |
| JP4923359B2 (ja) * | 2001-08-31 | 2012-04-25 | 旭硝子株式会社 | 青色光回折素子 |
-
2004
- 2004-08-11 JP JP2005513011A patent/JP4826255B2/ja not_active Expired - Lifetime
- 2004-08-11 WO PCT/JP2004/011560 patent/WO2005014522A1/ja not_active Ceased
- 2004-08-12 TW TW093124217A patent/TW200514840A/zh not_active IP Right Cessation
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- 2006-02-10 US US11/351,011 patent/US7081281B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10195138A (ja) * | 1996-05-20 | 1998-07-28 | Asahi Glass Co Ltd | アクリル酸誘導体化合物およびこれを重合した高分子液晶 |
| JP2001089529A (ja) * | 1999-09-24 | 2001-04-03 | Asahi Glass Co Ltd | アクリル酸誘導体化合物、これを重合した高分子液晶および用途 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010510256A (ja) * | 2006-11-24 | 2010-04-02 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | シクロヘキシレン反応性メソゲンおよびそれらの用途 |
| JP2014159428A (ja) * | 2006-11-24 | 2014-09-04 | Merck Patent Gmbh | シクロヘキシレン反応性メソゲンおよびそれらの用途 |
| WO2010001868A1 (ja) * | 2008-06-30 | 2010-01-07 | 旭硝子株式会社 | 光学異方性材料、光学素子および光情報記録再生装置 |
| US8293134B2 (en) | 2008-06-30 | 2012-10-23 | Asahi Glass Company, Limited | Optically anisotropic material, optical element and optical information writing/reading device |
| JP5348136B2 (ja) * | 2008-06-30 | 2013-11-20 | 旭硝子株式会社 | 光学異方性材料、光学素子および光情報記録再生装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI327162B (ja) | 2010-07-11 |
| JP4826255B2 (ja) | 2011-11-30 |
| TW200514840A (en) | 2005-05-01 |
| JPWO2005014522A1 (ja) | 2007-09-27 |
| US20060124900A1 (en) | 2006-06-15 |
| US7081281B2 (en) | 2006-07-25 |
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