WO2015001916A1 - 液晶組成物および液晶表示素子 - Google Patents
液晶組成物および液晶表示素子 Download PDFInfo
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- WO2015001916A1 WO2015001916A1 PCT/JP2014/065214 JP2014065214W WO2015001916A1 WO 2015001916 A1 WO2015001916 A1 WO 2015001916A1 JP 2014065214 W JP2014065214 W JP 2014065214W WO 2015001916 A1 WO2015001916 A1 WO 2015001916A1
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- liquid crystal
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- composition
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- OKRSVCKJPLEHEY-UHFFFAOYSA-N CC(C)(C1)NC(C)(C)CC1OC(C)=O Chemical compound CC(C)(C1)NC(C)(C)CC1OC(C)=O OKRSVCKJPLEHEY-UHFFFAOYSA-N 0.000 description 2
- NZNAAUDJKMURFU-UHFFFAOYSA-N CC(C)(C1)NC(C)(C)CC1OC(CC(C(CC(OC1CC(C)(C)NC(C)(C)C1)=O)C(OC1CC(C)(C)NC(C)(C)C1)=O)C(OC1CC(C)(C)NC(C)(C)C1)=O)=O Chemical compound CC(C)(C1)NC(C)(C)CC1OC(CC(C(CC(OC1CC(C)(C)NC(C)(C)C1)=O)C(OC1CC(C)(C)NC(C)(C)C1)=O)C(OC1CC(C)(C)NC(C)(C)C1)=O)=O NZNAAUDJKMURFU-UHFFFAOYSA-N 0.000 description 2
- WUPCFMITFBVJMS-UHFFFAOYSA-N CC(C)(C1)N(C)C(C)(C)CC1OC(CC(C(CC(OC1CC(C)(C)N(C)C(C)(C)C1)=O)C(OC1CC(C)(C)N(C)C(C)(C)C1)=O)C(OC1CC(C)(C)N(C)C(C)(C)C1)=O)=O Chemical compound CC(C)(C1)N(C)C(C)(C)CC1OC(CC(C(CC(OC1CC(C)(C)N(C)C(C)(C)C1)=O)C(OC1CC(C)(C)N(C)C(C)(C)C1)=O)C(OC1CC(C)(C)N(C)C(C)(C)C1)=O)=O WUPCFMITFBVJMS-UHFFFAOYSA-N 0.000 description 1
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- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
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- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
- G02F1/0045—Liquid crystals characterised by their physical properties
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- C09K2019/0466—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 linking chain being a -CF2O- chain
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- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/123—Ph-Ph-Ph
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- C09K19/3001—Cyclohexane rings
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- 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
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- C09K19/3001—Cyclohexane rings
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- C09K19/3001—Cyclohexane rings
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- 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
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
- C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
- C09K2019/3077—Cy-Cy-COO-Ph
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- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
- C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
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- C09K2019/3422—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a six-membered ring
Definitions
- the present invention relates to a liquid crystal composition, a liquid crystal display element containing the composition, and the like.
- the present invention relates to a liquid crystal composition having a positive dielectric anisotropy, and an AM (active matrix) device containing this composition and having a TN, OCB, IPS, FFS, or FPA mode.
- the classification based on the operation mode of the liquid crystal molecules is as follows: PC (phase change), TN (twisted nematic), STN (super twisted nematic), ECB (electrically controlled birefringence), OCB (optically compensated bend), IPS. (In-plane switching), VA (vertical alignment), FFS (Fringe field Switching), FPA (field-induced photo-reactive alignment), etc.
- the classification based on the element drive system is PM (passive matrix) and AM (active matrix). PM is classified into static and multiplex, and AM is classified into TFT (thin film insulator), MIM (metal insulator metal), and the like. TFTs are classified into amorphous silicon and polycrystalline silicon. The latter is classified into a high temperature type and a low temperature type according to the manufacturing process.
- the classification based on the light source includes a reflection type using natural light, a transmission type using backlight, and a semi-transmission type using both natural light and backlight.
- the liquid crystal display element contains a liquid crystal composition having a nematic phase.
- This composition has suitable properties. By improving the characteristics of the composition, an AM device having good characteristics can be obtained. The relationship between the two characteristics is summarized in Table 1 below. The characteristics of the composition will be further described based on a commercially available AM device.
- the temperature range of the nematic phase is related to the temperature range in which the device can be used.
- a preferred upper limit temperature of the nematic phase is about 70 ° C. or more, and a preferred lower limit temperature of the nematic phase is about ⁇ 10 ° C. or less.
- the viscosity of the composition is related to the response time of the device. A short response time is preferred for displaying moving images on the device.
- the elastic constant of the composition is related to the contrast of the device. In order to increase the contrast in the device, a large elastic constant in the composition is more preferable.
- the optical anisotropy of the composition is related to the contrast ratio of the device. Depending on the mode of the device, a large optical anisotropy or a small optical anisotropy, ie an appropriate optical anisotropy is required.
- the product ( ⁇ n ⁇ d) of the optical anisotropy ( ⁇ n) of the composition and the cell gap (d) of the device is designed to maximize the contrast ratio.
- the appropriate product value depends on the type of operation mode. For a device with a mode such as TN, a suitable value is about 0.45 ⁇ m. In this case, a composition having a large optical anisotropy is preferable for a device having a small cell gap.
- a large dielectric anisotropy in the composition contributes to a low threshold voltage, a small power consumption and a large contrast ratio in the device. Therefore, a large dielectric anisotropy is preferable.
- a large specific resistance in the composition contributes to a large voltage holding ratio and a large contrast ratio in the device. Therefore, a composition having a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature of the nematic phase in the initial stage is preferable.
- a composition having a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature of the nematic phase after being used for a long time is preferable.
- the stability of the composition against ultraviolet rays and heat is related to the lifetime of the liquid crystal display device. When their stability is high, the lifetime of the device is long. Such characteristics are preferable for an AM device used in a liquid crystal projector, a liquid crystal television, and the like.
- a liquid crystal composition containing a polymer is used.
- a composition to which a small amount of a polymerizable compound is added is injected into the device.
- the composition is irradiated with ultraviolet rays while applying a voltage between the substrates of the device.
- the polymerizable compound polymerizes to form a polymer network in the composition.
- the response time of the device is shortened, and image burn-in is improved.
- Such an effect of the polymer can be expected for a device having modes such as TN, ECB, OCB, IPS, VA, FFS, and FPA.
- a composition having a positive dielectric anisotropy is used for an AM device having a TN mode.
- a composition having a negative dielectric anisotropy is used in an AM device having a VA mode.
- a composition having a positive or negative dielectric anisotropy is used in an AM device having an IPS mode or an FFS mode.
- a composition having positive or negative dielectric anisotropy is used in a polymer-supported orientation type AM device.
- the compound (1) described in this specification is disclosed in the following Patent Document 1.
- One object of the present invention is to provide a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability against ultraviolet rays, a high heat
- It is a liquid crystal composition satisfying at least one characteristic in the characteristics such as high stability with respect to and a large elastic constant.
- Another object is a liquid crystal composition having an appropriate balance between at least two properties.
- Another object is a liquid crystal composition containing an additive capable of suppressing generation of impurities due to ultraviolet irradiation.
- Another object is a liquid crystal display device containing such a composition.
- Another object is an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime.
- the present invention selects at least one compound selected from the group of compounds having a monovalent group represented by formula (1) as an additive and a group of compounds represented by formula (2) as a first component
- a liquid crystal composition containing at least one of the above-mentioned compounds, having a positive dielectric anisotropy and having a nematic phase, and a liquid crystal display device containing the composition.
- R 1 is hydrogen or alkyl having 1 to 15 carbons
- R 2 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or carbon number Ring A is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 1, 3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl
- Z 1 is a single bond, ethylene, carbonyloxy, or difluoromethyleneoxy
- X 1 and X 2 are independently is hydrogen or fluorine
- Y 1 is fluorine, chlorine, at least one hydrogen alkyl having 1 carbon is replaced with halogen 12 or at least one hydrogen is halo, From 1 carbon atoms is replaced by emissions be 12 alkoxy
- a is 1, 2, 3, or 4.
- Advantages of the present invention include a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability against ultraviolet light, and a high heat resistance.
- the liquid crystal composition satisfies at least one characteristic in characteristics such as stability and a large elastic constant.
- Another advantage is a liquid crystal composition having an appropriate balance between at least two properties.
- Another advantage is a liquid crystal composition containing an additive capable of suppressing generation of impurities due to ultraviolet irradiation.
- Another advantage is a liquid crystal display device containing such a composition.
- Another advantage is an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime.
- liquid crystal composition and “liquid crystal display element” may be abbreviated as “composition” and “element”, respectively.
- “Liquid crystal display element” is a general term for liquid crystal display panels and liquid crystal display modules.
- “Liquid crystal compound” is a compound having a liquid crystal phase such as a nematic phase and a smectic phase, and a composition that does not have a liquid crystal phase, but has the purpose of adjusting properties such as temperature range, viscosity, and dielectric anisotropy of the nematic phase. It is a general term for compounds mixed with products.
- This compound has a six-membered ring such as 1,4-cyclohexylene and 1,4-phenylene, and its molecular structure is rod-like.
- the “polymerizable compound” is a compound added for the purpose of forming a polymer in the composition.
- the liquid crystal composition is prepared by mixing a plurality of liquid crystal compounds.
- the ratio (content) of the liquid crystal compound is expressed as a percentage by weight (% by weight) based on the weight of the liquid crystal composition.
- additives such as an optically active compound, an antioxidant, an ultraviolet absorber, a dye, an antifoaming agent, a polymerizable compound, a polymerization initiator, and a polymerization inhibitor are added to the composition.
- the ratio (addition amount) of the additive is represented by a weight percentage (% by weight) based on the weight of the liquid crystal composition, similarly to the ratio of the liquid crystal compound. Weight parts per million (ppm) may be used.
- the ratio of the polymerization initiator and the polymerization inhibitor is exceptionally expressed based on the weight of the polymerizable compound.
- the upper limit temperature of the nematic phase may be abbreviated as “the upper limit temperature”.
- “Lower limit temperature of nematic phase” may be abbreviated as “lower limit temperature”.
- High specific resistance means that the composition has a large specific resistance not only at room temperature in the initial stage but also at a temperature close to the upper limit temperature of the nematic phase. It means having a large specific resistance even at a close temperature.
- High voltage holding ratio means that the device has a large voltage holding ratio not only at room temperature in the initial stage but also at a temperature close to the upper limit temperature of the nematic phase. It means having a large voltage holding ratio even at a temperature close to.
- the expression“ at least one ‘A’ may be replaced by ‘B’ ” means that the number of‘ A ’is arbitrary. When the number of ‘A’ is one, the position of ‘A’ is arbitrary, and when the number of ‘A’ is two or more, the positions can be selected without limitation. This rule also applies to the expression “at least one 'A' is replaced by 'B'”.
- R 2 is used for a plurality of compounds.
- two groups represented by any two R 2 may be the same or different.
- R 2 of the compound (2-1) is ethyl
- R 2 of compound (2-1) is ethyl
- R 2 of compound (2-1) is ethyl
- R 2 of compound (2-2) is propyl.
- This rule also applies to symbols such as R 1 , X 1 , Y 1 .
- formula (2) when a is 2, there are two rings A.
- the two rings represented by the two rings A may be the same or different.
- This rule also applies to any two rings A when a is greater than 2.
- This rule also applies to Z 3 , ring B, and the like.
- 2-Fluoro-1,4-phenylene means the following two divalent groups.
- fluorine may be leftward (L) or rightward (R). This rule also applies to asymmetric ring divalent groups such as tetrahydropyran-2,5-diyl.
- the present invention includes the following items.
- Item 1 At least one compound selected from the group of compounds having a monovalent group represented by formula (1) as an additive, and at least one selected from the group of compounds represented by formula (2) as a first component A liquid crystal composition containing two compounds, having a positive dielectric anisotropy, and having a nematic phase.
- R 1 is hydrogen or alkyl having 1 to 15 carbons
- R 2 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or carbon number Ring A is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 1, 3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl
- Z 1 is a single bond, ethylene, carbonyloxy, or difluoromethyleneoxy
- X 1 and X 2 are independently is hydrogen or fluorine
- Y 1 is fluorine, chlorine, at least one hydrogen alkyl having 1 carbon is replaced with halogen 12 or at least one hydrogen is halo, From 1 carbon atoms is replaced by emissions be 12 alkoxy
- a is 1, 2, 3, or 4.
- Item 2. The liquid crystal composition according to item 1, containing at least one compound selected from the group of compounds represented by formula (1-1) and formula (1-2) as an additive.
- R 1 , R 3 , R 4 , and R 5 are independently hydrogen or alkyl having 1 to 15 carbons;
- Z 2 is 1 carbon To alkylene, wherein at least one hydrogen may be replaced with a halogen and at least one —CH 2 — may be replaced with —O—.
- Item 3. The liquid crystal composition according to item 1 or 2, wherein the ratio of the compound represented by formula (1) is in the range of 0.005 wt% to 1 wt% based on the weight of the liquid crystal composition.
- Item 4. The liquid crystal composition according to any one of items 1 to 3, comprising at least one compound selected from the group of compounds represented by formulas (2-1) to (2-27) as a first component: object.
- R 2 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl having 2 to 12 carbons.
- Item 5 The liquid crystal composition according to any one of items 1 to 4, wherein the ratio of the first component is in the range of 10% by weight to 90% by weight based on the weight of the liquid crystal composition.
- Item 6. The liquid crystal composition according to any one of items 1 to 5, comprising at least one compound selected from the group of compounds represented by formula (3) as the second component.
- R 6 and R 7 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or at least one hydrogen is replaced with fluorine.
- Ring B and ring C are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5- Difluoro-1,4-phenylene;
- Z 3 is a single bond, ethylene or carbonyloxy;
- b is 1, 2 or 3.
- Item 7. The liquid crystal composition according to any one of items 1 to 6, comprising at least one compound selected from the group of compounds represented by formulas (3-1) to (3-13) as a second component: object.
- R 6 and R 7 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or C2-C12 alkenyl in which at least one hydrogen is replaced by fluorine.
- Item 8 The liquid crystal composition according to item 6 or 7, wherein the ratio of the second component is in the range of 10% by weight to 90% by weight based on the weight of the liquid crystal composition.
- the upper limit temperature of the nematic phase is 70 ° C. or higher, the optical anisotropy at a wavelength of 589 nm (measured at 25 ° C.) is 0.07 or higher, and the dielectric anisotropy at a frequency of 1 kHz (measured at 25 ° C.) is 2.
- the liquid crystal composition according to any one of items 1 to 8, which is the above.
- Item 10 A liquid crystal display device comprising the liquid crystal composition according to any one of items 1 to 9.
- Item 11 The liquid crystal display element according to item 10, wherein the operation mode of the liquid crystal display element is a TN mode, an ECB mode, an OCB mode, an IPS mode, an FFS mode, or an FPA mode, and the driving method of the liquid crystal display element is an active matrix method .
- Item 12 Use of the liquid crystal composition according to any one of items 1 to 9 in a liquid crystal display device.
- the present invention includes the following items.
- A The above composition further containing at least one of additives such as an optically active compound, an antioxidant, an ultraviolet absorber, a dye, an antifoaming agent, a polymerizable compound, a polymerization initiator, and a polymerization inhibitor.
- B An AM device containing the above composition.
- C The above composition containing a polymerizable compound, and a polymer-supported orientation (PSA) type AM device containing the composition.
- D A polymer-supported orientation (PSA) type AM device comprising the above-described composition, wherein the polymerizable compound in the composition is polymerized.
- (E) A device containing the above composition and having a mode of PC, TN, STN, ECB, OCB, IPS, VA, FFS, or FPA.
- (F) A transmissive device containing the above composition.
- (G) Use of the above composition as a composition having a nematic phase.
- (H) Use as an optically active composition by adding an optically active compound to the above composition.
- composition of the present invention will be described in the following order. First, the constitution of component compounds in the composition will be described. Second, the main characteristics of the component compounds and the main effects of the compounds on the composition will be explained. Third, the combination of components in the composition, the preferred ratio of the components, and the basis thereof will be described. Fourth, a preferred form of the component compound will be described. Fifth, preferred component compounds are shown. Sixth, additives that may be added to the composition will be described. Seventh, a method for synthesizing the component compounds will be described. Finally, the use of the composition will be described.
- composition of the component compounds in the composition will be described.
- the composition of the present invention is classified into Composition A and Composition B.
- Composition A may further contain other liquid crystalline compounds, additives and the like in addition to the compound selected from compound (1), compound (2) and compound (3).
- the “other liquid crystal compound” is a liquid crystal compound different from the compound (2) and the compound (3).
- Such compounds are mixed into the composition for the purpose of further adjusting the properties.
- Additives include optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, and the like.
- Composition B consists essentially of a compound selected from compound (1), compound (2) and compound (3). “Substantially” means that the composition may contain an additive but no other liquid crystal compound. Composition B has fewer components than composition A. From the viewpoint of reducing the cost, the composition B is preferable to the composition A. The composition A is preferable to the composition B from the viewpoint that the characteristics can be further adjusted by mixing other liquid crystal compounds.
- the main characteristics of the component compounds and the main effects of the compounds on the characteristics of the composition will be explained.
- the main characteristics of the component compounds are summarized in Table 2 based on the effects of the present invention.
- L means large or high
- M means moderate
- S means small or low.
- L, M, and S are classifications based on a qualitative comparison among the component compounds, and 0 (zero) means that the value is almost zero.
- a component compound may be decomposed
- Compound (1) suppresses the generation of impurities.
- Compound (1) gives no difference in the characteristics of the maximum temperature, optical anisotropy, and dielectric anisotropy.
- Compound (2) as the first component increases the dielectric anisotropy and decreases the minimum temperature.
- Compound (3) as the second component increases the maximum temperature or decreases the viscosity.
- a desirable ratio of compound (1) is approximately 0.005% by weight or more for suppressing the formation of impurities, and approximately 1% by weight or less for decreasing the minimum temperature.
- a more desirable ratio is in the range of approximately 0.01% by weight to approximately 0.5% by weight.
- a particularly desirable ratio is in the range of approximately 0.03% by weight to approximately 0.3% by weight.
- a desirable ratio of the first component is approximately 10% by weight or more for increasing the dielectric anisotropy, and approximately 90% by weight or less for decreasing the minimum temperature.
- a more desirable ratio is in the range of approximately 20% by weight to approximately 80% by weight.
- a particularly desirable ratio is in the range of approximately 30% by weight to approximately 70% by weight.
- a desirable ratio of the second component is approximately 10% by weight or more for increasing the maximum temperature or decreasing the viscosity, and approximately 90% by weight or less for increasing the dielectric anisotropy.
- a more desirable ratio is in the range of approximately 20% by weight to approximately 80% by weight.
- a particularly desirable ratio is in the range of approximately 30% by weight to approximately 70% by weight.
- R 1 , R 3 , R 4 and R 5 are independently hydrogen or alkyl having 1 to 15 carbons.
- Preferred R 1 , R 3 , R 4 , or R 5 is hydrogen or methyl. More preferred R 1 , R 3 , R 4 , or R 5 is hydrogen.
- Z 2 is alkylene having 1 to 20 carbon atoms, in which at least one hydrogen may be replaced by halogen, and at least one —CH 2 — may be replaced by —O—.
- Preferred halogen is fluorine or chlorine.
- Preferred Z 2 is alkylene having 1 to 20 carbons in which one or two —CH 2 — may be replaced by —O—. Further preferred Z 2 is alkylene having 4 to 16 carbon atoms.
- R 2 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl having 2 to 12 carbons. Desirable R 2 is alkyl having 1 to 12 carbons for increasing the stability to ultraviolet light or heat.
- R 6 and R 7 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or 2 to 12 carbons in which at least one hydrogen is replaced by fluorine. Of alkenyl. Desirable R 6 or R 7 is alkyl having 1 to 12 carbons for increasing the stability to ultraviolet light or heat, etc., and alkenyl having 2 to 12 carbons for decreasing the minimum temperature or decreasing the viscosity. is there.
- Preferred alkyl is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl. More desirable alkyl is ethyl, propyl, butyl, pentyl, or heptyl for decreasing the viscosity.
- Preferred alkoxy is methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, or heptyloxy. More desirable alkoxy is methoxy or ethoxy for decreasing the viscosity.
- Preferred alkenyl is vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl. More desirable alkenyl is vinyl, 1-propenyl, 3-butenyl, or 3-pentenyl for decreasing the viscosity.
- the preferred configuration of —CH ⁇ CH— in these alkenyls depends on the position of the double bond.
- Trans is preferable in alkenyl such as 1-propenyl, 1-butenyl, 1-pentenyl, 1-hexenyl, 3-pentenyl and 3-hexenyl for decreasing the viscosity.
- Cis is preferred for alkenyl such as 2-butenyl, 2-pentenyl, and 2-hexenyl.
- linear alkenyl is preferable to branching.
- alkenyl in which at least one hydrogen is replaced by fluorine are 2,2-difluorovinyl, 3,3-difluoro-2-propenyl, 4,4-difluoro-3-butenyl, 5,5-difluoro-4 -Pentenyl, or 6,6-difluoro-5-hexenyl. Further preferred examples are 2,2-difluorovinyl or 4,4-difluoro-3-butenyl for decreasing the viscosity.
- Ring A is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 1,3-dioxane-2,5- Diyl or tetrahydropyran-2,5-diyl. Desirable ring A is 1,4-phenylene or 2-fluoro-1,4-phenylene for increasing the optical anisotropy.
- Ring B and ring C are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5-difluoro-1,4-phenylene.
- Preferred ring B or ring C is 1,4-cyclohexylene for decreasing the viscosity, or 1,4-phenylene for increasing the optical anisotropy.
- trans is preferable to cis for increasing the maximum temperature.
- Tetrahydropyran-2,5-diyl is
- Z 1 is a single bond, ethylene, carbonyloxy, or difluoromethyleneoxy. Desirable Z 1 is a single bond for decreasing the viscosity, and difluoromethyleneoxy for increasing the dielectric anisotropy.
- Z 3 is a single bond, ethylene or carbonyloxy. Desirable Z 3 is a single bond for decreasing the viscosity.
- X 1 and X 2 are independently hydrogen or fluorine. Desirable X 1 or X 2 is fluorine for increasing the dielectric anisotropy.
- Y 1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced with halogen, or alkoxy having 1 to 12 carbons in which at least one hydrogen is replaced with halogen.
- Preferred halogen is fluorine or chlorine.
- Preferred Y 1 is fluorine, chlorine, trifluoromethyl, or trifluoromethoxy. More desirable Y 1 is fluorine for decreasing the minimum temperature.
- A is 1, 2, 3, or 4.
- Preferred a is 3 for increasing the maximum temperature.
- b is 1, 2 or 3.
- Preferred b is 1 for decreasing the viscosity, and 3 for increasing the maximum temperature.
- Preferred compound (1) is the above compound (1-1) or compound (1-2). In these compounds, it is preferable that at least two of the compounds (1) are a combination of the compound (1-1) and the compound (1-2).
- Desirable compound (2) is the above compound (2-1) to compound (2-27).
- at least one of the first components is compound (2-5), compound (2-11), compound (2-12), compound (2-13), compound (2-15), compound ( 2-16), compound (2-20), compound (2-23), or compound (2-25) is preferred.
- At least two of the first components are compound (2-12) and compound (2-23), compound (2-13) and compound (2-16), compound (2-15) and compound (2-16), The compound (2-16) and the compound (2-25), the compound (2-20) and the compound (2-25), or a combination of the compound (2-23) and the compound (2-25) is preferable.
- Desirable compounds (3) are the above compounds (3-1) to (3-13).
- at least one of the second components is the compound (3-1), the compound (3-3), the compound (3-5), the compound (3-6), the compound (3-8), the compound ( 3-9) or compound (3-13) is preferred.
- At least two of the second components are compound (3-1) and compound (3-5), compound (3-3) and compound (3-5), compound (3-1) and compound (3-6), The compound (3-3) and the compound (3-6), the compound (3-1) and the compound (3-8), or a combination of the compound (3-3) and the compound (3-8) is preferable.
- additives that may be added to the composition will be described.
- Such additives are optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, and the like.
- An optically active compound is added to the composition for the purpose of inducing a helical structure of liquid crystal to give a twist angle. Examples of such a compound are the compound (4-1) to the compound (4-5).
- a desirable ratio of the optically active compound is approximately 5% by weight or less. A more desirable ratio is in the range of approximately 0.01% by weight to approximately 2% by weight.
- an antioxidant is composed. Added to the product.
- a preferred example of the antioxidant is a compound (5) wherein n is an integer of 1 to 9.
- n is 1, 3, 5, 7, or 9. Further preferred n is 1 or 7. Since the compound (5) in which n is 1 has high volatility, it is effective in preventing a decrease in specific resistance due to heating in the atmosphere. Since the compound (5) in which n is 7 has low volatility, it is effective for maintaining a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature after the device has been used for a long time.
- a desirable ratio of the antioxidant is approximately 50 ppm or more for achieving its effect, and is approximately 600 ppm or less for avoiding a decrease in the maximum temperature or avoiding an increase in the minimum temperature. A more desirable ratio is in the range of approximately 100 ppm to approximately 300 ppm.
- the ultraviolet absorber examples include benzophenone derivatives, benzoate derivatives, triazole derivatives and the like. Also preferred are light stabilizers such as sterically hindered amines.
- a desirable ratio of these absorbers and stabilizers is approximately 50 ppm or more for achieving the effect thereof, and approximately 10,000 ppm or less for avoiding a decrease in the maximum temperature or avoiding an increase in the minimum temperature. A more desirable ratio is in the range of approximately 100 ppm to approximately 10,000 ppm.
- a dichroic dye such as an azo dye or an anthraquinone dye is added to the composition in order to adapt it to a GH (guest host) mode element.
- a preferred ratio of the dye is in the range of approximately 0.01% by weight to approximately 10% by weight.
- an antifoaming agent such as dimethyl silicone oil or methylphenyl silicone oil is added to the composition.
- a desirable ratio of the antifoaming agent is approximately 1 ppm or more for obtaining the effect thereof, and approximately 1000 ppm or less for preventing a display defect.
- a more desirable ratio is in the range of approximately 1 ppm to approximately 500 ppm.
- a polymerizable compound is added to the composition in order to adapt it to a polymer support alignment (PSA) type device.
- Preferred examples of the polymerizable compound are compounds having a polymerizable group such as acrylate, methacrylate, vinyl compound, vinyloxy compound, propenyl ether, epoxy compound (oxirane, oxetane), vinyl ketone and the like. Further preferred examples are acrylate or methacrylate derivatives. Examples of such a compound are the compound (6-1) to the compound (6-9).
- a desirable ratio of the polymerizable compound is approximately 0.05% by weight or more for achieving the effect thereof, and approximately 10% by weight or less for preventing a display defect. A more desirable ratio is in the range of approximately 0.1% by weight to approximately 2% by weight.
- R 8 , R 9 , R 10 , and R 11 are independently acryloyloxy (—OCO—CH ⁇ CH 2 ) or methacryloyloxy (—OCO— C (CH 3 ) ⁇ CH 2 ) and R 12 and R 13 are independently hydrogen, halogen, or alkyl having 1 to 10 carbons;
- Z 4 , Z 5 , Z 6 , and Z 7 are Independently, it is a single bond or alkylene having 1 to 12 carbons, in which at least one —CH 2 — may be replaced by —O— or —CH ⁇ CH—;
- c, d and e Are independently 0, 1 or 2.
- the vertical line across the hexagon represents that any hydrogen on the six-membered ring may be replaced by fluorine.
- a subscript such as c indicates the number of fluorines replaced. This rule also applies to the compound (6-2).
- the sum of c and d is 1 or more, and in the compound (6-4), the sum of c, d and e is 1 or more.
- Preferred halogen is fluorine or chlorine.
- Polymerizable compound is polymerized by ultraviolet irradiation.
- the polymerization may be performed in the presence of an initiator such as a photopolymerization initiator.
- an initiator such as a photopolymerization initiator.
- Appropriate conditions for polymerization, the appropriate type of initiator, and the appropriate amount are known to those skilled in the art and are described in the literature.
- Irgacure 651 registered trademark; BASF
- Irgacure 184 registered trademark; BASF
- Darocur 1173 registered trademark; BASF
- a desirable ratio of the photopolymerization initiator is in the range of approximately 0.1% by weight to approximately 5% by weight based on the weight of the polymerizable compound.
- a more desirable ratio is in the range of approximately 1% by weight to approximately 3% by weight.
- a polymerization inhibitor When storing the polymerizable compound, a polymerization inhibitor may be added to prevent polymerization.
- the polymerizable compound is usually added to the composition without removing the polymerization inhibitor.
- the polymerization inhibitor include hydroquinone derivatives such as hydroquinone and methylhydroquinone, 4-tert-butylcatechol, 4-methoxyphenol, phenothiazine and the like.
- the composition of the present invention mainly has a minimum temperature of about ⁇ 10 ° C. or lower, a maximum temperature of about 70 ° C. or higher, and an optical anisotropy in the range of about 0.07 to about 0.20.
- a device containing this composition has a large voltage holding ratio.
- This composition is suitable for an AM device.
- This composition is particularly suitable for a transmissive AM device.
- a composition having an optical anisotropy in the range of about 0.08 to about 0.25 by controlling the proportion of the component compounds or by mixing other liquid crystal compounds, and further from about 0.10 Compositions having optical anisotropy in the range of about 0.30 may be prepared.
- This composition can be used as a composition having a nematic phase, or can be used as an optically active composition by adding an optically active compound.
- This composition can be used for an AM device. Further, it can be used for PM elements.
- This composition can be used for an AM device and a PM device having modes such as PC, TN, STN, ECB, OCB, IPS, FFS, VA, and FPA.
- Use for an AM device having a TN, OCB, IPS mode or FFS mode is particularly preferable.
- the alignment of liquid crystal molecules may be parallel to or perpendicular to the glass substrate.
- These elements may be reflective, transmissive, or transflective. Use in a transmissive element is preferred. It can also be used for an amorphous silicon-TFT device or a polycrystalline silicon-TFT device.
- NCAP non-curvilinear-aligned-phase
- PD polymer-dispersed
- the present invention will be described in more detail with reference to examples. The invention is not limited by these examples.
- the present invention includes a mixture of the composition of Example 1 and the composition of Example 2.
- the invention also includes a mixture of at least two of the example compositions.
- the synthesized compound was identified by a method such as NMR analysis. The properties of the compounds and compositions were measured by the methods described below.
- NMR analysis DRX-500 manufactured by Bruker BioSpin Corporation was used for measurement.
- the sample was dissolved in a deuterated solvent such as CDCl 3, and the measurement was performed at room temperature, 500 MHz, and 16 times of integration.
- Tetramethylsilane was used as an internal standard.
- CFCl 3 was used as an internal standard and the number of integrations was 24.
- s is a singlet
- d is a doublet
- t is a triplet
- q is a quartet
- quint is a quintet
- sex is a sextet
- m is a multiplet
- br is broad.
- GC-14B gas chromatograph manufactured by Shimadzu Corporation was used for measurement.
- the carrier gas is helium (2 mL / min).
- the sample vaporization chamber was set at 280 ° C, and the detector (FID) was set at 300 ° C.
- capillary column DB-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m; stationary liquid phase is dimethylpolysiloxane; nonpolar) manufactured by Agilent Technologies Inc. was used.
- the column was held at 200 ° C. for 2 minutes and then heated to 280 ° C. at a rate of 5 ° C./min.
- a sample was prepared in an acetone solution (0.1% by weight), and 1 ⁇ L thereof was injected into the sample vaporization chamber.
- the recorder is a C-R5A Chromatopac manufactured by Shimadzu Corporation, or an equivalent product.
- the obtained gas chromatogram showed the peak retention time and peak area corresponding to the component compounds.
- capillary column As a solvent for diluting the sample, chloroform, hexane or the like may be used.
- the following capillary column may be used.
- HP-1 from Agilent Technologies Inc. (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), Rtx-1 from Restek Corporation (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), BP-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m) manufactured by SGE International Pty.
- a capillary column CBP1-M50-025 length 50 m, inner diameter 0.25 mm, film thickness 0.25 ⁇ m
- Shimadzu Corporation may be used.
- the ratio of the liquid crystal compound contained in the composition may be calculated by the following method.
- a mixture of liquid crystal compounds is detected by a gas chromatograph (FID).
- the area ratio of peaks in the gas chromatogram corresponds to the ratio (weight ratio) of liquid crystal compounds.
- the correction coefficient of each liquid crystal compound may be regarded as 1. Therefore, the ratio (% by weight) of the liquid crystal compound can be calculated from the peak area ratio.
- Measurement sample When measuring the properties of the composition, the composition was used as it was as a sample.
- a sample for measurement was prepared by mixing this compound (15% by weight) with mother liquid crystals (85% by weight). The characteristic value of the compound was calculated from the value obtained by the measurement by extrapolation.
- (Extrapolated value) ⁇ (Measured value of sample) ⁇ 0.85 ⁇ (Measured value of mother liquid crystal) ⁇ / 0.15.
- the ratio of the compound and the mother liquid crystal is 10% by weight: 90% by weight, 5% by weight: 95% by weight, 1% by weight: 99% by weight in this order. changed.
- the maximum temperature, optical anisotropy, viscosity, and dielectric anisotropy values for the compound were determined.
- the following mother liquid crystals were used.
- the ratio of the component compounds is shown by weight%.
- Measurement method The characteristics were measured by the following method. Many of these methods have been modified by the methods described in the JEITA standard (JEITA ED-2521B) established by the Japan Electronics and Information Technology Industries Association (hereinafter referred to as JEITA). Was the way. No thin film transistor (TFT) was attached to the TN device used for the measurement.
- JEITA Japan Electronics and Information Technology Industries Association
- nematic phase (NI; ° C.): A sample was placed on a hot plate of a melting point measuring apparatus equipped with a polarizing microscope and heated at a rate of 1 ° C./min. The temperature was measured when a part of the sample changed from a nematic phase to an isotropic liquid.
- the upper limit temperature of the nematic phase may be abbreviated as “upper limit temperature”.
- T C Minimum temperature of nematic phase
- a sample having a nematic phase is placed in a glass bottle and placed in a freezer at 0 ° C., ⁇ 10 ° C., ⁇ 20 ° C., ⁇ 30 ° C., and ⁇ 40 ° C. for 10 days. After storage, the liquid crystal phase was observed. For example, when the sample remained in a nematic phase at ⁇ 20 ° C. and changed to a crystalline or smectic phase at ⁇ 30 ° C., the TC was described as ⁇ 20 ° C.
- the lower limit temperature of the nematic phase may be abbreviated as “lower limit temperature”.
- Viscosity Bulk viscosity; ⁇ ; measured at 20 ° C .; mPa ⁇ s: An E-type viscometer manufactured by Tokyo Keiki Co., Ltd. was used for the measurement.
- Viscosity (Rotational Viscosity; ⁇ 1; Measured at 25 ° C .; mPa ⁇ s): The measurement was performed according to the method described in M. Imai et al., Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995). I followed. A sample was put in a TN device having a twist angle of 0 ° and a distance (cell gap) between two glass substrates of 5 ⁇ m. A voltage was applied to this device in steps of 0.5 V in the range of 16 V to 19.5 V. After no application for 0.2 seconds, the application was repeated under the condition of only one rectangular wave (rectangular pulse; 0.2 seconds) and no application (2 seconds).
- the peak current (peak current) and peak time (peak time) of the transient current (transient current) generated by this application were measured.
- the value of rotational viscosity was obtained from these measured values and the calculation formula (8) described on page 40 in the paper by M. Imai et al.
- the value of dielectric anisotropy necessary for this calculation was determined by the method described below using the element whose rotational viscosity was measured.
- Threshold voltage (Vth; measured at 25 ° C .; V): An LCD5100 luminance meter manufactured by Otsuka Electronics Co., Ltd. was used for the measurement.
- the light source was a halogen lamp.
- a sample was put in a normally white mode TN device in which the distance between two glass substrates (cell gap) was 0.45 / ⁇ n ( ⁇ m) and the twist angle was 80 degrees.
- the voltage (32 Hz, rectangular wave) applied to this element was increased stepwise from 0V to 10V by 0.02V.
- the device was irradiated with light from the vertical direction, and the amount of light transmitted through the device was measured.
- a voltage-transmittance curve was created in which the transmittance was 100% when the light amount reached the maximum and the transmittance was 0% when the light amount was the minimum.
- the threshold voltage was expressed as a voltage when the transmittance reached 90%.
- VHR-a Voltage holding ratio
- the TN device used for the measurement had a polyimide alignment film, and the distance between two glass substrates (cell gap) was 5 ⁇ m. . This element was sealed with an adhesive that was cured with ultraviolet rays after the sample was placed.
- the TN device was charged by applying a pulse voltage (60 microseconds at 1 V).
- the decaying voltage was measured with a high-speed voltmeter for 166.7 milliseconds, and the area A between the voltage curve and the horizontal axis in a unit cycle was determined.
- Area B was the area when it was not attenuated.
- the voltage holding ratio was expressed as a percentage of area A with respect to area B.
- VHR-b Voltage holding ratio (VHR-b; measured at 60 ° C .;%): The voltage holding ratio was measured in the same procedure as above except that it was measured at 60 ° C. instead of 25 ° C. The obtained value was expressed as VHR-b.
- VHR-c Voltage holding ratio
- VHR-d Voltage holding ratio
- the rise time ( ⁇ r: rise time; millisecond) is the time required for the transmittance to change from 90% to 10%.
- the fall time ( ⁇ f: fall time; millisecond) is the time required to change the transmittance from 10% to 90%.
- the response time was expressed as the sum of the rise time and the fall time thus obtained.
- Helical pitch (P; measured at room temperature; ⁇ m): The helical pitch was measured by the wedge method. See “Liquid Crystal Handbook", page 196 (2000 published, Maruzen). The sample was poured into a wedge-shaped cell and allowed to stand at room temperature for 2 hours, and then the disclination line interval (d2-d1) was observed with a polarizing microscope (Nikon Corporation, trade name: MM40 / 60 series). The helical pitch (P) was calculated from the following equation in which the angle of the wedge cell was expressed as ⁇ . P 2 ⁇ (d2 ⁇ d1) ⁇ tan ⁇ .
- the compounds in Examples were represented by symbols based on the definitions in Table 3 below.
- Table 3 the configuration regarding 1,4-cyclohexylene is trans.
- the number in parentheses after the symbol corresponds to the compound number.
- the symbol ( ⁇ ) means other liquid crystal compounds.
- the ratio (percentage) of the liquid crystal compound is a weight percentage (% by weight) based on the weight of the liquid crystal composition.
- a sample was prepared by adding 0.1% by weight of the compound (1-1-1) to this composition, and irradiated with 260 mW / cm 2 of ultraviolet rays for 600 seconds.
- An EXERCURE 4000-D type mercury xenon lamp manufactured by HOYA CANDEO OPTRONICS Co., Ltd. was used for ultraviolet irradiation.
- the impurity content of this sample was 1.8 GC%.
- Example 1 The composition before addition of the compound (1-1-1) in Example 1 was irradiated with ultraviolet rays under the same conditions as in Example 1 and subjected to gas chromatographic analysis. The impurity content at this time was 2.6 GC%.
- the content of impurities was 0.07 GC%.
- a sample was prepared by adding 0.1% by weight of the compound (1-2-1) to this composition. The sample was irradiated with ultraviolet rays under the same conditions as in Example 1 for gas chromatographic analysis. The impurity content at this time was 1.6 GC%.
- the content of impurities was 0.09 GC%.
- a sample was prepared by adding 0.05% by weight of the compound (1-1-1) to this composition. The sample was irradiated with ultraviolet rays under the same conditions as in Example 1 for gas chromatographic analysis. The content of impurities at this time was 1.7 GC%.
- the content of impurities was 0.07 GC%.
- a sample was prepared by adding 0.05% by weight of the compound (1-2-1) to this composition, and irradiated with ultraviolet rays under the same conditions as in Example 1, and gas chromatographic analysis was performed. The impurity content at this time was 1.5 GC%.
- the content of impurities was 0.08 GC%.
- a sample was prepared by adding 0.04% by weight of the compound (1-2-2) to this composition. The sample was irradiated with ultraviolet rays under the same conditions as in Example 1 for gas chromatographic analysis. The content of impurities at this time was 1.7 GC%.
- the content of impurities was 0.06 GC%.
- a sample was prepared by adding 0.07% by weight of the compound (1-1-2) to this composition, and irradiated with ultraviolet rays under the same conditions as in Example 1, and gas chromatographic analysis was performed. The impurity content at this time was 1.4 GC%.
- the content of impurities was 0.09 GC%.
- a sample was prepared by adding 0.03% by weight of the compound (1-1-1) to this composition, and irradiated with ultraviolet rays under the same conditions as in Example 1, and subjected to gas chromatographic analysis. The impurity content at this time was 1.9 GC%.
- a sample was prepared by adding 0.03% by weight of the compound (1-1-1) and 0.03% by weight of the compound (1-2-1) to this composition, and under the same conditions as in Example 1. Irradiated with ultraviolet rays, gas chromatographic analysis was performed. The impurity content at this time was 1.8 GC%.
- the content of impurities was 0.11 GC%.
- a sample was prepared by adding 0.1% by weight of the compound (1-1-1) to this composition, and irradiated with ultraviolet rays under the same conditions as in Example 1, and gas chromatographic analysis was performed. The impurity content at this time was 1.8 GC%.
- compositions of Examples 1 to 9 have high stability against ultraviolet rays because the amount of impurities generated by ultraviolet irradiation (difference in content before and after) is small compared to the composition of Comparative Example 1. Therefore, it can be concluded that the liquid crystal composition according to the present invention has excellent characteristics.
- the liquid crystal composition of the present invention has a high maximum temperature, a low minimum temperature, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a large elastic constant, a high stability against ultraviolet rays, and a high heat resistance.
- properties such as stability, large elastic constants, at least one property is satisfied, or an appropriate balance is achieved with respect to at least two properties. Since the liquid crystal display element containing this composition has a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long life, and the like, it can be used for a liquid crystal projector, a liquid crystal television, and the like.
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Abstract
Description
式(1)および式(2)において、R1は、水素または炭素数1から15のアルキルであり;R2は、炭素数1から12のアルキル、炭素数1から12のアルコキシ、または炭素数2から12のアルケニルであり;環Aは、1,4-シクロへキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、1,3-ジオキサン-2,5-ジイル、またはテトラヒドロピラン-2,5-ジイルであり;Z1は、単結合、エチレン、カルボニルオキシ、またはジフルオロメチレンオキシであり;X1およびX2は独立して、水素またはフッ素であり;Y1はフッ素、塩素、少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルキル、または少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルコキシであり;aは、1、2、3、または4である。
式(1)および式(2)において、R1は、水素または炭素数1から15のアルキルであり;R2は、炭素数1から12のアルキル、炭素数1から12のアルコキシ、または炭素数2から12のアルケニルであり;環Aは、1,4-シクロへキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、1,3-ジオキサン-2,5-ジイル、またはテトラヒドロピラン-2,5-ジイルであり;Z1は、単結合、エチレン、カルボニルオキシ、またはジフルオロメチレンオキシであり;X1およびX2は独立して、水素またはフッ素であり;Y1はフッ素、塩素、少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルキル、または少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルコキシであり;aは、1、2、3、または4である。
式(1-1)および式(1-2)において、R1、R3、R4、およびR5は独立して、水素または炭素数1から15のアルキルであり;Z2は炭素数1から20のアルキレンであり、このアルキレンにおいて、少なくとも1つの水素はハロゲンで置き換えられてもよく、少なくとも1つの-CH2-は、-O-で置き換えられてもよい。
式(2-1)から式(2-27)において、R2は、炭素数1から12のアルキル、炭素数1から12のアルコキシ、または炭素数2から12のアルケニルである。
式(3)において、R6およびR7は独立して、炭素数1から12のアルキル、炭素数1から12のアルコキシ、炭素数2から12のアルケニル、または少なくとも1つの水素がフッ素で置き換えられた炭素数2から12のアルケニルであり;環Bおよび環Cは独立して、1,4-シクロへキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、または2,5-ジフルオロ-1,4-フェニレンであり;Z3は、単結合、エチレンまたはカルボニルオキシであり;bは、1、2または3である。
式(3-1)から式(3-13)において、R6およびR7は独立して、炭素数1から12のアルキル、炭素数1から12のアルコキシ、炭素数2から12のアルケニル、または少なくとも1つの水素がフッ素で置き換えられた炭素数2から12のアルケニルである。
3-HHXB(F,F)-F (2-5) 13%
2-HHBB(F,F)-F (2-17) 4%
3-HHBB(F,F)-F (2-17) 5%
4-HHBB(F,F)-F (2-17) 4%
5-HHBB(F,F)-F (2-17) 4%
4-GB(F)B(F,F)XB(F,F)-F (2-23) 7%
3-BB(F)B(F,F)XB(F)-F (2-24) 4%
3-BB(F)B(F,F)XB(F,F)-F (2-25) 3%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 8%
5-BB(F)B(F,F)XB(F,F)-F (2-25) 6%
3-HH-V (3-1) 30%
4-HH-V1 (3-1) 5%
7-HB-1 (3-2) 3%
3-HHB-O1 (3-5) 4%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=107.2℃;Tc<-20℃;Δn=0.113;Δε=11.0;Vth=1.48V;η=16.0mPa・s;γ1=101.3mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.08GC%であった。
この組成物に化合物(1-1-1)を0.1重量%の割合で添加した試料を調製し、260mW/cm2の紫外線を600秒間照射した。紫外線の照射には、HOYA CANDEO OPTRONICS株式会社製のEXECURE4000-D型水銀キセノンランプを用いた。この試料の不純物の含有量は1.8GC%であった。
実施例1における化合物(1-1-1)を添加する前の組成物に、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は2.6GC%であった。
3-HHXB(F,F)-F (2-5) 9%
4-GHB(F,F)-F (2-7) 5%
2-HHBB(F,F)-F (2-17) 4%
3-HHBB(F,F)-F (2-17) 6%
4-HHBB(F,F)-F (2-17) 5%
4-GB(F)B(F,F)XB(F,F)-F (2-23) 7%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 9%
5-BB(F)B(F,F)XB(F,F)-F (2-25) 7%
3-HHB-CL (2) 3%
3-HH-V (3-1) 29%
3-HH-VFF (3-1) 4%
3-HB-O2 (3-2) 3%
3-HHB-3 (3-5) 3%
5-HBB-2 (3-6) 3%
3-HBBH-1O1 (-) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=109.4℃;Tc<-20℃;Δn=0.112;Δε=10.4;Vth=1.59V;η=15.5mPa・s;γ1=102.6mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.07GC%であった。
この組成物に化合物(1-2-1)を0.1重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.6GC%であった。
3-HHXB(F,F)-F (2-5) 11%
3-HGB(F,F)-F (2-6) 3%
4-GHB(F,F)-F (2-7) 10%
3-BB(F,F)XB(F,F)-F (2-16) 9%
2-HHBB(F,F)-F (2-17) 4%
3-HHBB(F,F)-F (2-17) 5%
4-HHBB(F,F)-F (2-17) 5%
5-HHBB(F,F)-F (2-17) 5%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 9%
5-BB(F)B(F,F)XB(F,F)-F (2-25) 3%
3-HH-V (3-1) 20%
3-HH-V1 (3-1) 5%
3-HHB-1 (3-5) 8%
3-HBB-2 (3-6) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=106.8℃;Tc<-20℃;Δn=0.109;Δε=11.3;Vth=1.50V;η=20.1mPa・s;γ1=125.2mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.09GC%であった。
この組成物に化合物(1-1-1)を0.05重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.7GC%であった。
3-HHB(F,F)-F (2-3) 3%
3-HHXB(F,F)-F (2-5) 13%
3-HB(F)B(F,F)-F (2-9) 5%
3-BB(F,F)XB(F,F)-F (2-16) 16%
3-HHBB(F,F)-F (2-17) 3%
4-GBB(F)B(F,F)-F (2-19) 3%
3-HBBXB(F,F)-F (2-20) 8%
3-HBB(F,F)XB(F,F)-F (2-21) 6%
3-HH-V (3-1) 24%
3-HH-V1 (3-1) 7%
V2-BB-1 (3-3) 3%
3-HHEH-3 (3-4) 3%
1-BB(F)B-2V (3-8) 3%
5-HBB(F)B-2 (3-13) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=85.0℃;Tc<-20℃;Δn=0.109;Δε=8.5;Vth=1.45V;η=17.0mPa・s;γ1=85.6mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.07GC%であった。
この組成物に化合物(1-2-1)を0.05重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.5GC%であった。
3-HB-CL (2-1) 6%
5-HXB(F,F)-F (2-2) 5%
3-HHB(F,F)-F (2-3) 10%
3-HHEB(F,F)-F (2-4) 9%
3-HHXB(F,F)-F (2-5) 19%
2-HBEB(F,F)-F (2-10) 3%
3-HBEB(F,F)-F (2-10) 3%
3-BBXB(F,F)-F (2-15) 3%
3-BB(F,F)XB(F,F)-F (2-16) 7%
3-dhBB(F,F)XB(F,F)-F (2-22) 4%
3-BB(F)B(F,F)XB(F)B(F,F)-F
(2-27) 3%
3-HH-V (3-1) 7%
3-HH-V1 (3-1) 10%
5-HH-V (3-1) 7%
3-HHEBH-3 (3-9) 4%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=78.8℃;Tc<-20℃;Δn=0.085;Δε=10.0;Vth=1.09V;η=16.8mPa・s;γ1=82.2mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.08GC%であった。
この組成物に化合物(1-2-2)を0.04重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.7GC%であった。
3-GB(F,F)XB(F,F)-F (2-12) 4%
3-BB(F)B(F,F)-CF3 (2-14) 3%
3-BB(F,F)XB(F,F)-F (2-16) 16%
3-HHB(F)B(F,F)-F (2-18) 4%
3-HBBXB(F,F)-F (2-20) 10%
4-GB(F)B(F,F)XB(F,F)-F (2-23) 4%
5-GB(F)B(F,F)XB(F,F)-F (2-23) 4%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 7%
3-HH-V (3-1) 25%
3-HH-O1 (3-1) 3%
1-BB-3 (3-3) 3%
V-HHB-1 (3-5) 11%
5-B(F)BB-2 (3-7) 3%
2-BB(F)B-3 (3-8) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=73.9℃;Tc<-20℃;Δn=0.120;Δε=12.4;Vth=1.24V;η=17.5mPa・s;γ1=92.4mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.06GC%であった。
この組成物に化合物(1-1-2)を0.07重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.4GC%であった。
3-HBB(F,F)-F (2-8) 4%
3-GB(F)B(F,F)-F (2-11) 3%
3-BB(F)B(F,F)-F (2-13) 6%
3-BB(F,F)XB(F,F)-F (2-16) 18%
3-HBBXB(F,F)-F (2-20) 3%
3-BB(F)B(F,F)XB(F,F)-F (2-25) 3%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 7%
4-BB(F,F)XB(F)B(F,F)-F (2-26) 3%
3-HH-V (3-1) 29%
V-HHB-1 (3-5) 11%
2-BB(F)B-2V (3-8) 4%
3-HB(F)HH-5 (3-10) 3%
5-HBBH-3 (3-11) 3%
3-HB(F)BH-3 (3-12) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=80.6℃;Tc<-30℃;Δn=0.124;Δε=9.9;Vth=1.54V;η=20.6mPa・s;γ1=75.1mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.09GC%であった。
この組成物に化合物(1-1-1)を0.03重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.9GC%であった。
3-HHXB(F,F)-F (2-5) 10%
4-GHB(F,F)-F (2-7) 10%
3-BB(F,F)XB(F,F)-F (2-16) 6%
2-HHBB(F,F)-F (2-17) 4%
3-HHBB(F,F)-F (2-17) 6%
4-HHBB(F,F)-F (2-17) 5%
5-HHBB(F,F)-F (2-17) 5%
3-GBB(F)B(F,F)-F (2-19) 3%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 8%
5-BB(F)B(F,F)XB(F,F)-F (2-25) 3%
3-HH-V (3-1) 19%
2-HH-3 (3-1) 4%
3-HH-4 (3-1) 3%
V2-BB-1 (3-3) 6%
3-HHB-1 (3-5) 5%
5-HBB(F)B-3 (3-13) 3%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=107.1℃;Tc<-20℃;Δn=0.115;Δε=10.6;Vth=1.55V;η=19.2mPa・s;γ1=118.7mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.10GC%であった。
この組成物に化合物(1-1-1)を0.03重量%、化合物(1-2-1)を0.03重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.8GC%であった。
3-GB(F,F)XB(F,F)-F (2-12) 8%
3-GBB(F)B(F,F)-F (2-19) 3%
4-GBB(F)B(F,F)-F (2-19) 3%
3-HBBXB(F,F)-F (2-20) 3%
4-GB(F)B(F,F)XB(F,F)-F (2-23) 5%
5-GB(F)B(F,F)XB(F,F)-F (2-23) 5%
4-BB(F)B(F,F)XB(F,F)-F (2-25) 7%
5-BB(F)B(F,F)XB(F,F)-F (2-25) 5%
3-HHXB(F,F)-CF3 (2) 12%
3-HH-V (3-1) 22%
3-HH-V1 (3-1) 10%
3-HH-2V1 (3-1) 9%
V2-HHB-1 (3-5) 8%
誘電率異方性が正である上記の組成物を調製し、特性を測定した。NI=89.7℃;Tc<-20℃;Δn=0.102;Δε=13.7;Vth=1.35V;η=20.6mPa・s;γ1=126.5mPa・s.この組成物をガスクロマトグラフ分析したところ、不純物の含有量は0.11GC%であった。
この組成物に化合物(1-1-1)を0.1重量%の割合で添加した試料を調製し、実施例1と同じ条件で紫外線を照射し、ガスクロマト分析を行った。このときの不純物の含有量は1.8GC%であった。
Claims (12)
- 添加物として式(1)で表される一価基を有する化合物の群から選択された少なくとも1つの化合物、および第一成分として式(2)で表される化合物の群から選択された少なくとも1つの化合物を含有し、正の誘電率異方性を有し、そしてネマチック相を有する液晶組成物。
式(1)および式(2)において、R1は、水素または炭素数1から15のアルキルであり;R2は、炭素数1から12のアルキル、炭素数1から12のアルコキシ、または炭素数2から12のアルケニルであり;環Aは、1,4-シクロへキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、1,3-ジオキサン-2,5-ジイル、またはテトラヒドロピラン-2,5-ジイルであり;Z1は、単結合、エチレン、カルボニルオキシ、またはジフルオロメチレンオキシであり;X1およびX2は独立して、水素またはフッ素であり;Y1はフッ素、塩素、少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルキル、または少なくとも1つの水素がハロゲンで置き換えられた炭素数1から12のアルコキシであり;aは、1、2、3、または4である。 - 液晶組成物の重量に基づいて、式(1)で表される化合物の割合が0.005重量%から1重量%の範囲である、請求項1または2に記載の液晶組成物。
- 液晶組成物の重量に基づいて、第一成分の割合が10重量%から90重量%の範囲である、請求項1から4のいずれか1項に記載の液晶組成物。
- 液晶組成物の重量に基づいて、第二成分の割合が10重量%から90重量%の範囲である、請求項6または7に記載の液晶組成物。
- ネマチック相の上限温度が70℃以上であり、波長589nmにおける光学異方性(25℃で測定)が0.07以上であり、そして周波数1kHzにおける誘電率異方性(25℃で測定)が2以上である、請求項1から8のいずれか1項に記載の液晶組成物。
- 請求項1から9のいずれか1項に記載の液晶組成物を含有する液晶表示素子。
- 液晶表示素子の動作モードが、TNモード、ECBモード、OCBモード、IPSモード、FFSモード、またはFPAモードであり、液晶表示素子の駆動方式がアクティブマトリックス方式である、請求項10に記載の液晶表示素子。
- 請求項1から9のいずれか1項に記載の液晶組成物の液晶表示素子における使用。
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CN105308153A (zh) | 2016-02-03 |
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KR20150142067A (ko) | 2015-12-21 |
KR101646637B1 (ko) | 2016-08-08 |
US9688915B2 (en) | 2017-06-27 |
EP3018186B1 (en) | 2019-07-24 |
EP3018186A1 (en) | 2016-05-11 |
US20160145491A1 (en) | 2016-05-26 |
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