TW202142679A - Cholesteric liquid crystal composition and uses thereof and liquid crystal element wherein the cholesteric liquid crystal element has a wide usable temperature range, high display quality, and low driving voltage - Google Patents

Abstract

The present invention relates to a cholesteric liquid crystal composition, use thereof, and a liquid crystal element. The cholesteric liquid crystal element desirably has a wide usable temperature range, high display quality, and low driving voltage. Therefore, the characteristics of the liquid crystal composition require that the upper limit temperature of the cholesteric phase is high, the lower limit temperature of the cholesteric phase is low, the specific resistance is large, the optical anisotropy is relatively large, the dielectric anisotropy is large, the viscosity is small, the spiral pitch length is appropriate, and the temperature dependence of the pitch length is small. A cholesteric liquid crystal composition and a liquid crystal element containing the same, the cholesteric liquid crystal composition includes: at least one optically active compound selected from the group consisting of compounds represented by formula (1) as an additive, at least one compound selected from the group consisting of compounds represented by formula (2) as a first component, and at least one compound selected from the group consisting of compounds represented by formula (3) as a second component.

Description

Cholesteric liquid crystal composition and its use, liquid crystal element

The present invention relates to a cholesteric liquid crystal composition, a liquid crystal element containing the composition, and the like. The cholesteric liquid crystal composition is characterized in that the liquid crystal composition contains an optical activity having an octahydrobinaphthalene skeleton. Compound. In particular, it relates to a cholesteric liquid crystal composition exhibiting large dielectric anisotropy, and a device for driving the cholesteric liquid crystal composition.

In liquid crystal elements, the classification based on the action mode of liquid crystal molecules is phase change (PC), twisted nematic (TN), super twisted nematic (STN), and electrically controlled birefringence ( Electrically controlled birefringence (ECB), optically compensated bend (OCB), inplane switching (IPS), vertical alignment (VA), fringe field switching (FFS), electric field induction Modes such as field-induced photo-reactive alignment (FPA). The classification based on the driving method of the element is a passive matrix (PM) and an active matrix (AM). PM is classified into static and multiplexed types, and AM is classified into thin film transistors (TFT) and metal insulator metal (MIM). TFTs are classified into amorphous silicon and polycrystal silicon. The latter is classified into a high temperature type and a low temperature type according to the manufacturing steps. The classification based on the light source is classified into a reflective type using natural light, a transmissive type using backlight, and a semi-transmissive type using both natural light and backlight.

A liquid crystal composition containing an optically active compound sometimes exhibits a "cholesteric phase." The cholesteric phase is a liquid crystal phase in which the orientation of the molecular alignment order rotates in a spiral manner. The spiral axis is a direction perpendicular to the direction of the alignment order. In addition, the spiral period is referred to as "pitch".

A liquid crystal element including a liquid crystal composition exhibiting a "cholesteric phase" is known. These liquid crystal compositions have a pitch length of the order of visible light. The liquid crystal composition exhibiting a cholesteric phase exhibits selective reflection of circularly polarized light, and the rotation direction of the light vector corresponds to the left and right characteristics (handedness) of the cholesteric spiral. The reflection wavelength λ can be calculated by formula (A) based on the pitch P of the cholesteric spiral and the average birefringence n of the cholesteric liquid crystal. λ=n×P (A)

The most common cholesteric liquid crystal elements are SSCT (Surface Stability Cholesteric Texture) and PSCT (Polymer Stability Cholesteric Texture) elements. SSCT and PSCT elements usually include a cholesteric liquid crystal composition. For example, in the initial stage, it shows a planar structure that reflects light of a specific wavelength, and is switched to focal conic light scattering by applying an alternating current pulse. Structure, or vice versa.

After these liquid crystal elements are bistable, that is, after the electric field is switched off, they maintain their respective states, and only reapply the electric field to reverse the transition to the initial state. When a higher voltage pulse is applied, the cholesteric liquid crystal composition transitions to a homeotropic, transparent state, and from the state, when the voltage is rapidly switched off, it relaxes to a flat state. In the case where the voltage is slowly switched, the relaxation becomes the focal conic state.

Cholesteric liquid crystal elements generally do not require a backlight. In a flat state, the cholesteric liquid crystal composition in the pixel shows selective reflection of light of a specific wavelength in accordance with the formula (A). As a result, the pixel is visible with a corresponding reflection color on a black background, for example. If it migrates to a scattering state or a vertical transparent state due to the focal conic structure, the reflected color disappears. For the reasons mentioned above, the power consumption of the cholesteric liquid crystal element is relatively low. Furthermore, regarding these, in the scattering state, even if the viewing angle dependency exists, for example, it is small. Therefore, these displays do not require active matrix addressing and can perform simpler multiplexing or passive component matrix operations. On the other hand, since the display quality is poor, for the purpose of improving the display quality, there are also reports of elements combined with an active matrix (Patent Document 1 and Patent Document 2).

In order to be used in the cholesteric liquid crystal element, the liquid crystal composition must have good chemical stability and thermal stability, as well as good stability against electric field and electromagnetic radiation. Furthermore, the liquid crystal material must have a high upper limit temperature of the cholesteric phase, a low lower limit temperature of the cholesteric phase, relatively large optical anisotropy, large dielectric anisotropy, and small viscosity. Furthermore, the cholesteric liquid crystal material must be able to express different reflection wavelengths in the visible region through simple and controlled polarization. With regard to these, it is necessary to further reduce the temperature dependence of the reflection wavelength.

Liquid crystals are generally used as a mixture of multiple components, so it is important that the components can be easily mixed with each other. Further characteristics such as dielectric anisotropy and optical anisotropy must meet different necessary conditions according to the cell type. However, it is not possible to achieve preferable values for all the parameters described above by using the composition available in the prior art. For example, Patent Document 3 describes a cholesteric liquid crystal composition including nematic liquid crystals containing two or more optically active compounds. However, the mixture disclosed here merely has a small optical anisotropy and a low upper limit temperature of the nematic phase. Furthermore, these have a high ratio of 26% of optically active compounds.

Therefore, it has an appropriate spiral pitch length, a wide operating temperature range, a short response time, a low driving voltage, and a low temperature dependence of the reflection wavelength, and there are no disadvantages compared with the liquid crystal composition of the prior art. Or liquid crystal compositions for cholesteric liquid crystal devices with at least greatly reduced disadvantages are in great demand. The object of the present invention is to provide a composition for a cholesteric liquid crystal device that has the required characteristics and does not have the disadvantages of the prior art, or the disadvantages of the prior art are at least greatly reduced. [Prior Art Literature]

[Patent Literature] [Patent Document 1] Japanese Patent Laid-Open No. 7-140440 [Patent Document 2] Japanese Patent No. 5750818 [Patent Document 3] Japanese Patent Laid-Open No. 3-045906 [Patent Document 4] Japanese Patent Publication No. 2004-532345

[The problem to be solved by the invention] The cholesteric liquid crystal element desirably has a wide usable temperature range, high display quality, and low driving voltage. Therefore, the characteristics of the liquid crystal composition require that the upper limit temperature of the cholesteric phase is high, the lower limit temperature of the cholesteric phase is low, the specific resistance is large, the optical anisotropy is relatively large, the dielectric anisotropy is large, the viscosity is small, the spiral pitch length is appropriate, and The temperature dependence of the pitch length is small.

The object of the present invention is to provide a liquid crystal composition that has good required characteristics and an excellent balance of characteristics with respect to a cholesteric liquid crystal device. [Technical means to solve the problem]

The inventors conducted diligent studies, and as a result, found that a liquid crystal composition containing an optically active compound having a specific structure solves the above-mentioned problems, thereby completing the present invention.

The present invention includes the following items and so on.

式（1）中，R¹¹ 及R¹² 獨立地為氫、鹵素、-C≡N、-N=C=O、-N=C=S、-SF₅ 、或碳數1～10的烷基，所述烷基中，至少一個-CH₂ -可經-O-、-COO-、-OCO-、-CH=CH-、或-C≡C-取代，這些基中，至少一個氫可經氟或氯取代；環A¹¹ 及環A¹² 獨立地為1,4-伸環己基、1,4-伸苯基、1,3-二噁烷-2,5-二基、四氫吡喃-2,5-二基、四氫吡喃-3,5-二基、嘧啶-2,5-二基、吡啶-2,5-二基、或1,4-雙環-(2,2,2)-伸辛基，這些環中，至少一個氫可經氟或氯取代；Z¹¹ 及Z¹² 獨立地為單鍵或碳數1～20的伸烷基，所述伸烷基中，至少一個-CH₂ -可經-O-、-CO-、-COO-、-OCO-、-CH=CH-、或-C≡C-取代，這些基中，至少一個氫可經氟或氯取代；X¹¹ 及X¹² 獨立地為單鍵、伸乙基、亞甲基氧基、羰基氧基或二氟亞甲基氧基；n¹¹ 及n¹² 獨立地為2、3或4，存在多個的環A¹¹ 、環A¹² 、Z¹¹ 或Z¹² 分別可相同，也可不同； 式（2）及式（3）中，R² 、R³¹ 及R³² 獨立地為碳數1～12的烷基、碳數1～12的烷氧基、或碳數2～12的烯基；環A² 獨立地為1,4-伸環己基、1,4-伸苯基、2-氟-1,4-伸苯基、2,5-二氟-1,4-伸苯基、2,6-二氟-1,4-伸苯基、吡啶-2,5-二基、嘧啶-2,5-二基、1,3-二噁烷-2,5-二基、或四氫吡喃-2,5-二基；環A³ 獨立地為1,4-伸環己基、1,4-伸苯基、2-氟-1,4-伸苯基、2,5-二氟-1,4-伸苯基、或2,6-二氟-1,4-伸苯基；Z² 及Z³ 獨立地為單鍵、伸乙基、伸乙烯基、亞甲基氧基、羰基氧基、二氟亞甲基氧基、伸乙炔基、或四氟伸乙基；X² 為-C≡N或-N=C=S；Y²¹ 及Y²² 獨立地為氫或氟；n² 為1或2，在n² 表示2的情況下，存在多個的環A² 或Z² 分別可相同，也可不同；n³ 為1、2或3，在n³ 表示2或3的情況下，存在多個的環A³ 或Z³ 分別可相同，也可不同。Item 1. A cholesteric liquid crystal composition comprising: as an additive, at least one optically active compound selected from the group of compounds represented by formula (1), and as a first component selected from the group of compounds represented by formula (2) At least one compound in the group of compounds represented, and at least one compound selected from the group of compounds represented by formula (3) as the second component,

In formula (1), R ¹¹ and R ^{12 are} independently hydrogen, halogen, -C≡N, -N=C=O, -N=C=S, -SF ₅ , or an alkyl group having 1 to 10 carbon atoms , In the alkyl group, at least one -CH ₂ -may be substituted by -O-, -COO-, -OCO-, -CH=CH-, or -C≡C-, and in these groups, at least one hydrogen may be substituted by Fluorine or chlorine substitution; ring A ¹¹ and ring A ^{12 are} independently 1,4-cyclohexylene, 1,4-phenylene, 1,3-dioxane-2,5-diyl, tetrahydropyran -2,5-diyl, tetrahydropyran-3,5-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl, or 1,4-bicyclo-(2,2, 2)-Octylene, in these rings, at least one hydrogen may be replaced by fluorine or chlorine; Z ¹¹ and Z ^{12 are} independently a single bond or an alkylene group with 1 to 20 carbon atoms. In the alkylene group, at least One -CH ₂ -can be substituted by -O-, -CO-, -COO-, -OCO-, -CH=CH-, or -C≡C-, in these groups, at least one hydrogen can be replaced by fluorine or chlorine ; X ¹¹ and X ^{12 are} independently a single bond, ethylene, methyleneoxy, carbonyloxy or difluoromethyleneoxy; n ¹¹ and n ^{12 are} independently 2, 3 or 4, there are many The ring A ¹¹ , ring A ¹² , Z ¹¹ or Z ^{12 of} each may be the same or different; in formula (2) and formula (3), R ² , R ³¹ and R ^{32 are} independently carbon numbers 1-12 The alkyl group, the alkoxy group having 1 to 12 carbons, or the alkenyl group having 2 to 12 carbons; ring A ^{2 is} independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro- 1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2 ,5-diyl, 1,3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl; ring A ^{3 is} independently 1,4-cyclohexylene, 1, 4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, or 2,6-difluoro-1,4-phenylene; Z ² and Z ^{3 are} independently a single bond, ethylene, ethylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, ethynylene, or tetrafluoroethylene; X ² is -C≡N or -N=C=S; Y ²¹ and Y ^{22 are} independently hydrogen or fluorine; n ² is 1 or 2. When n ² represents 2, there are multiple rings A ² or Z ² Each may be the same or different; n ³ is 1, 2 or 3, and when n ³ represents 2 or 3, a plurality of rings A ³ or Z ³ may be the same or different.

式（4）中，R⁴ 為碳數1～12的烷基、碳數1～12的烷氧基、或碳數2～12的烯基；環A⁴¹ 及環A⁴² 獨立地為1,4-伸環己基、1,4-伸苯基、2-氟-1,4-伸苯基、2,5-二氟-1,4-伸苯基、2,6-二氟-1,4-伸苯基、吡啶-2,5-二基、嘧啶-2,5-二基、1,3-二噁烷-2,5-二基、或四氫吡喃-2,5-二基；環A⁴³ 為1,4-伸苯基、2-氟-1,4-伸苯基、2,5-二氟-1,4-伸苯基、或2,6-二氟-1,4-伸苯基；Z⁴¹ 、Z⁴² 及Z⁴³ 獨立地為單鍵、伸乙基、伸乙烯基、亞甲基氧基、羰基氧基、二氟亞甲基氧基、或四氟伸乙基；Y⁴¹ 及Y⁴² 獨立地為氫或氟；X⁴ 為氟、氯、至少一個氫經鹵素取代的碳數1～12的烷基、至少一個氫經鹵素取代的碳數1～12的烷氧基、或至少一個氫經鹵素取代的碳數2～12的烯基；n⁴ 為0、1或2，在n⁴ 表示2的情況下，存在多個的環A⁴¹ 及Z⁴¹ 分別可相同，也可不同。Item 2. The cholesteric liquid crystal composition according to Item 1, further containing as a third component at least one compound selected from the group of compounds represented by formula (4),

In formula (4), R ⁴ is an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; ring A ⁴¹ and ring A ^{42 are} independently 1, 4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1, 4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl Group; Ring A ⁴³ is 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, or 2,6-difluoro-1 ,4-phenylene; Z ⁴¹ , Z ⁴² and Z ^{43 are} independently a single bond, ethylene, ethylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, or tetrafluoro Ethylene group; Y ⁴¹ and Y ^{42 are} independently hydrogen or fluorine; X ⁴ is fluorine, chlorine, an alkyl group with 1 to 12 carbons in which at least one hydrogen is substituted by halogen, and at least one hydrogen is substituted with halogen to have a carbon number of 1 to The alkoxy group of 12, or the alkenyl group of 2-12 carbons in which at least one hydrogen is substituted by halogen; n ⁴ is 0, 1 or 2, and when n ⁴ represents 2, there are multiple rings A ⁴¹ and Z ⁴¹ can be the same or different.

式（1-1）至式（1-6）中，R¹¹ 及R¹² 獨立地為氫、鹵素、-C≡N、-N=C=O、-N=C=S、-SF₅ 、或碳數1～10的烷基，所述烷基中，至少一個-CH₂ -可經-O-、-COO-、-OCO-、-CH=CH-、或-C≡C-取代，這些基中，至少一個氫可經氟或氯取代。Item 3. The cholesteric liquid crystal composition according to Item 1 or 2, which contains as an additive at least one selected from the group of compounds represented by formula (1-1) to formula (1-6). Active compound,

In formulas (1-1) to (1-6), R ¹¹ and R ^{12 are} independently hydrogen, halogen, -C≡N, -N=C=O, -N=C=S, -SF ₅ , Or an alkyl group with 1 to 10 carbon atoms, in which at least one -CH ₂ -may be substituted with -O-, -COO-, -OCO-, -CH=CH-, or -C≡C-, Among these groups, at least one hydrogen may be substituted with fluorine or chlorine.

Item 4. The cholesteric liquid crystal composition according to any one of items 1 to 3, wherein the ratio of the additive is in the range of 0.1 to 10 parts by weight based on the weight of the liquid crystal composition.

式（2-1）至式（2-23）中，R² 獨立地為碳數1～12的烷基、碳數1～12的烷氧基、或碳數2～12的烯基；X² 獨立地為-C≡N或-N=C=S；Y²¹ 及Y²² 獨立地為氫或氟。Item 5. The cholesteric liquid crystal composition according to any one of items 1 to 4, containing as the first component a group selected from the group of compounds represented by formula (2-1) to formula (2-23) At least one compound in

In formulas (2-1) to (2-23), R ^{2 is} independently an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; X ^{2 is} independently -C≡N or -N=C=S; Y ²¹ and Y ^{22 are} independently hydrogen or fluorine.

Item 6. The cholesteric liquid crystal composition according to any one of Items 1 to 5, wherein the ratio of the first component is in the range of 5% by weight to 50% by weight based on the weight of the liquid crystal composition.

式（3-1）至式（3-28）中，R³¹ 及R³² 獨立地為碳數1～12的烷基、碳數1～12的烷氧基、或碳數2～12的烯基。Item 7. The cholesteric liquid crystal composition according to any one of Items 1 to 6, which contains as a second component the group of compounds represented by formula (3-1) to formula (3-28) At least one compound in

In formulas (3-1) to (3-28), R ³¹ and R ^{32 are} independently an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkene having 2 to 12 carbons base.

Item 8. The cholesteric liquid crystal composition according to any one of Items 1 to 7, wherein the ratio of the second component is in the range of 30% by weight to 90% by weight based on the weight of the liquid crystal composition.

式（4-1）至式（4-19）中，R⁴ 為碳數1～12的烷基、碳數1～12的烷氧基、或碳數2～12的烯基；Y⁴¹ 及Y⁴² 獨立地為氫或氟；X⁴ 為氟、氯、至少一個氫經鹵素取代的碳數1～12的烷基、至少一個氫經鹵素取代的碳數1～12的烷氧基、或至少一個氫經鹵素取代的碳數2～12的烯基。Item 9. The cholesteric liquid crystal composition according to any one of Items 2 to 8, which further contains a group of compounds selected from the group consisting of formula (4-1) to formula (4-19) as a third component At least one compound in the group,

In formulas (4-1) to (4-19), R ⁴ is an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; Y ⁴¹ and Y ^{42 is} independently hydrogen or fluorine; X ⁴ is fluorine, chlorine, an alkyl group having 1 to 12 carbons in which at least one hydrogen is substituted by halogen, an alkoxy group having 1 to 12 carbons in which at least one hydrogen is substituted by halogen, or Alkenyl having 2-12 carbons in which at least one hydrogen is substituted by halogen.

Item 10. The cholesteric liquid crystal composition according to any one of Items 2 to 9, wherein the ratio of the third component is in the range of 10% by weight to 50% by weight based on the weight of the liquid crystal composition.

Item 11. The cholesteric liquid crystal composition according to any one of items 1 to 10, wherein the optical anisotropy (measured at 25°C) at a wavelength of 589 nm is in the range of 0.10 to 0.40, and the frequency is 1 kHz The lower dielectric anisotropy (measured at 25°C) is in the range of 10-60.

Item 12. The cholesteric liquid crystal composition according to any one of Items 1 to 11, wherein the selective reflection wavelength is in the range of 350 nm to 800 nm.

Item 13. A liquid crystal element comprising the cholesteric liquid crystal composition according to any one of Items 1 to 12.

Item 14. Use of a cholesteric liquid crystal composition for a liquid crystal element, the cholesteric liquid crystal composition being the cholesteric liquid crystal composition according to any one of items 1 to 12. [Effects of the invention]

The cholesteric liquid crystal composition of the present invention has a high upper limit temperature of the cholesteric phase, a low lower limit temperature of the cholesteric phase, a large specific resistance, a relatively large optical anisotropy, a large dielectric anisotropy, a small viscosity, and a spiral pitch length Among the characteristics such as proper and small temperature dependence of the pitch length, at least one characteristic is sufficiently satisfied. Furthermore, there is an appropriate balance between at least two characteristics. In addition, the liquid crystal element of the present invention has characteristics such as a wide operating temperature range, a large voltage holding ratio, a low driving voltage, a large contrast ratio, a short response time, easy control of reflection wavelength, and low display quality degradation caused by environmental temperature changes.

The usage of the terms in this manual is as follows. The terms "liquid crystal composition" and "liquid crystal element" are sometimes abbreviated as "composition" and "device", respectively. "Liquid crystal element" is a general term for liquid crystal display panels, liquid crystal display modules, and liquid crystal devices using liquid crystal compositions. "Liquid crystal compounds" are compounds that have liquid crystal phases such as nematic, cholesteric, and smectic phases. Although they do not have liquid crystal phases, they are used to adjust the temperature range, viscosity, and dielectric anisotropy of the liquid crystal phase. The general term for the compounds mixed in the composition for the purpose of. The compound has, for example, a six-membered ring such as 1,4-cyclohexylene or 1,4-phenylene, and its molecular structure is rod-like. At least one compound selected from the group of compounds represented by formula (1) may be referred to simply as "compound (1)". "Compound (1)" means one compound, a mixture of two compounds, or a mixture of three or more compounds represented by formula (1). The same applies to compounds represented by other formulas.

The liquid crystal composition is prepared by mixing a plurality of liquid crystal compounds. The ratio (content) of the liquid crystal compound is represented by the weight percentage (wt%) based on the weight of the liquid crystal composition. If necessary, additives such as optically active compounds, antioxidants, ultraviolet absorbers, pigments, defoamers, polymerizable compounds, polymerization initiators, and polymerization inhibitors are added to the liquid crystal composition. With regard to the additives, the liquid crystal composition may be referred to as the "host nematic liquid crystal composition" together with the "host liquid crystal composition" or the type of liquid crystal phase, for example. In addition, each liquid crystal compound in the "host liquid crystal composition" is sometimes referred to as a "component compound". The ratio (addition amount) of the additives is represented by the blending amount (parts by weight) when the weight of the host liquid crystal composition is 100. Furthermore, depending on additives, parts per million by weight (ppm) may also be used. The ratio of the polymerization initiator and the polymerization inhibitor is exceptionally expressed based on the weight of the polymerizable compound.

In the present invention, a liquid crystal composition exhibiting a "cholesteric phase" by adding an optically active compound to a host liquid crystal composition exhibiting a nematic phase is referred to as "cholesteric liquid crystal" or "cholesteric liquid crystal composition" .

The "upper limit temperature of the nematic or cholesteric phase" is sometimes referred to simply as the "upper limit temperature". The "lower limit temperature of the nematic phase or cholesteric phase" is sometimes referred to simply as the "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 cholesteric phase, and not only at room temperature after long-term use, Moreover, it has a large specific resistance at a temperature close to the upper limit temperature of the cholesteric phase. "High voltage retention rate" means that the device has a large voltage retention rate not only at room temperature in the initial stage, but also at a temperature close to the upper limit temperature of the cholesteric phase, and not only at room temperature after long-term use It also has a large voltage retention rate at a temperature close to the upper limit temperature of the cholesteric phase.

The expression "at least one ‘A’" means that the number of ‘A’s is arbitrary. The expression "at least one'A' can be substituted by'B'" means that when the number of'A' is one, the position of'A' is arbitrary, and when the number of'A' is two or more, these positions You can also choose unlimitedly. The rules also apply to the expression "at least one ‘A’ is replaced by a ‘B’".

In the chemical formulas of the component compounds, ^{symbols such as the terminal group R 11} are used for various compounds. In these compounds, any two ^{groups represented by R 11} may be the same or different. For example, there ^{is a case where R 11} of the compound (1) is an ethyl group, and ^{R 11} of the compound (1-1) is an ethyl group. There is also the compound (1) is R ¹¹ is ethyl and R of the compound (1-1) is propyl ^11. The above rules also apply to the markings of other end groups and the like. In formula (1), when n ¹¹ is 2, there are two rings A ¹¹ . In the compound, the two rings ^{represented by the two rings A 11} may be the same or different. The rule is also applicable to any two rings A ^{11 when n 11 is} greater than 2. The rules also apply to Z ¹¹ , rings A ¹² , Z ¹² , rings A ² , Z ² , rings A ³ , Z ³ , rings A ⁴¹ , Z ⁴¹ and so on.

The alkyl group of the liquid crystal compound is linear or branched, and does not contain a cyclic alkyl group. Straight-chain alkyl is better than branched alkyl. The same applies to terminal groups such as alkoxy and alkenyl. Regarding the configuration related to 1,4-cyclohexylene, in order to increase the upper limit temperature, the trans configuration is better than the cis configuration. Since 2-fluoro-1,4-phenylene is left-right asymmetric, there are leftward (L) and rightward (R) directions. The same is true for divalent groups such as tetrahydropyran-2,5-diyl. The same applies to bonding groups such as carbonyloxy groups (-COO- or -OCO-).

The liquid crystal element of the present invention contains a liquid crystal composition having a cholesteric phase, that is, a cholesteric liquid crystal composition. The composition has appropriate characteristics. By improving the characteristics of the composition, a liquid crystal element having good characteristics can be obtained. The correlation between the two characteristics is summarized in Table 1 below. The characteristics of the composition will be further described based on a commercially available liquid crystal element. The temperature range of the cholesteric phase is related to the usable temperature range of the element. The preferable upper limit temperature of the cholesteric phase is about 70°C or higher, and the preferable lower limit temperature of the cholesteric phase is about -10°C or lower. The high specific resistance of the composition contributes to the high voltage retention rate of the device. Therefore, it is preferably 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 cholesteric phase. It is preferably 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 cholesteric phase after long-term use. The specific resistance of the liquid crystal composition at room temperature is preferably 1×10 ¹⁰ Ω·cm or more, more preferably 1×10 ¹² Ω·cm or more, and still more preferably 1×10 ¹⁴ Ω·cm or more. Table 1. Characteristics of liquid crystal composition and liquid crystal element Numbering Characteristics of liquid crystal composition Characteristics of liquid crystal elements 1 Wide temperature range of the cholesteric phase Wide range of usable temperature 2 Larger specific resistance High voltage retention rate 3 Large optical anisotropy Display bright 4 Large dielectric anisotropy Low driving voltage 5 Low viscosity Short response time 6 The spiral pitch length can be adjusted with a small amount of optically active compound added, and the temperature dependence of the pitch length is small It is easy to control the reflection wavelength, and the deterioration of display quality caused by temperature changes is small

The optical anisotropy of the composition is associated with a bright display. In order to realize a bright display, a liquid crystal composition having relatively large optical anisotropy is required. The optical anisotropy (measured at 25°C) at a wavelength of 589 nm is preferably in the range of 0.10 to 0.40, more preferably in the range of 0.12 to 0.35, and still more preferably in the range of 0.15 to 0.30. The large dielectric anisotropy of the composition contributes to the low driving voltage of the device, so it is preferable that the dielectric anisotropy is relatively large. The dielectric anisotropy (measured at 25° C.) at a frequency of 1 kHz is preferably in the range of 10 to 60, more preferably in the range of 15 to 55, and still more preferably in the range of 20 to 50. The viscosity of the composition is related to the response time of the device. In order to display a moving image using an element, it is preferable that the response time be short. Ideally a response time shorter than 1 millisecond. Therefore, it is preferable that the viscosity of the composition is small. The viscosity at 20°C is preferably 120 mPa·s or less, and more preferably 80 mPa·s or less. More preferably, the viscosity at a low temperature is small. Regarding the helical pitch length of the composition, in order not to impair the characteristics of the host nematic liquid crystal composition, it is preferable to adjust the reflection wavelength to the visible region with an optically active compound added in as little amount as possible. In addition, in order not to degrade the display quality due to the temperature change of the environment, it is preferable that the temperature dependence of the spiral pitch length is almost no or small.

The present invention also includes the following items. (A) The composition further contains at least one of additives such as antioxidants, ultraviolet absorbers, pigments, defoamers, polymerizable compounds, polymerization initiators, polymerization inhibitors, and polar compounds. (B) A liquid crystal element containing the composition. (C) A transmission type and reflection type element containing the composition.

The cholesteric liquid crystal composition of the present invention will be described in the following order. First, the composition of the composition will be explained. Second, the main characteristics of the additives and the component compounds in the host liquid crystal composition, and the main effects of the compounds on the composition will be described. Third, the preferred ratio of the combination of additives and component compounds in the composition and its basis will be described. Fourth, preferable additives and component compounds are shown. Fifth, the additives that can be added to the composition will be described.

First, the composition of the composition will be explained. The composition of the present invention is classified into composition A and composition B. Composition A is a composition containing compound (1) as an additive and a liquid crystal compound selected from compound (2), compound (3) and compound (4) as component compounds, and may further contain other liquid crystals Sexual compounds, other additives, etc. The "other liquid crystal compound" is a liquid crystal compound different from the compound (2), the compound (3), and the compound (4). "Other additives" are additives different from the compound (1), and are mixed in the composition for the purpose of further adjusting the characteristics. Other additives include antioxidants, ultraviolet absorbers, pigments, defoamers, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds, and the like.

The composition B essentially includes only the compound (1), which is an additive, and a liquid crystal compound (component compound) selected from the group consisting of the compound (2), the compound (3), and the compound (4). "Substantially" means that although the composition may contain other additives, it does not contain other liquid crystal compounds. The composition B is superior to the composition A from the viewpoint of a small number of components of the liquid crystal compound and cost reduction. The composition A is superior to the composition B from the viewpoint that the characteristics can be further adjusted by mixing other liquid crystal compounds.

Second, the main characteristics of the additive and the component compounds in the host liquid crystal composition, and the main effects of the compound on the composition or device will be described. The optically active compound (1) as an additive is added to the host nematic liquid crystal composition, and a cholesteric phase is developed. Therefore, the structure of formula (1) is not a racemate. In addition, the optically active compound of formula (1) can be produced by the method described in International Publication No. 2014/097952. Based on the effects of the present invention, the main characteristics of the component compounds are summarized in Table 2. In the notation in Table 2, L means large or high, M means medium, and S means small or low. The symbols L, M, and S are classifications based on qualitative comparison between component compounds, and 0 (zero) means extremely small.

Table 2. Properties of the compound Compound Compound (2) Compound (3) Compound (4) Upper temperature S～L S～L S～L Viscosity M～L S～M M～L Optical anisotropy S～M S～L M～L Dielectric anisotropy M～L 0 M～L Specific resistance L L L

The main effects of the component compounds on the characteristics of the composition are as follows. The compound (2) as the first component increases the dielectric anisotropy. The compound (3) as the second component increases the optical anisotropy, and also increases the upper limit temperature or lowers the lower limit temperature. The compound (4) as the third component increases the dielectric anisotropy.

Third, the preferred ratio of the combination of additives and component compounds in the composition and its basis will be described. The preferable combination in the composition is compound (1) + compound (2) + compound (3), or compound (1) + compound (2) + compound (3) + compound (4). A further preferred combination is compound (1) + compound (2) + compound (3) + compound (4).

Based on the weight of the host nematic liquid crystal composition, in order to obtain a stable twisted state of the cholesteric liquid crystal composition, the preferred addition ratio of the compound (1) is 0.1 parts by weight or more, in order not to impair the host nematic liquid crystal composition Characteristics, the preferable addition ratio of the compound (1) is 10 parts by weight or less. A further preferable addition ratio is in the range of 0.5 parts by weight to 7 parts by weight. The particularly preferred addition ratio is in the range of 1 part by weight to 5 parts by weight.

Based on the weight of the host nematic liquid crystal composition, in order to increase the dielectric anisotropy, the preferred ratio of the compound (2) as the first component is 5% by weight or more. In order not to increase the viscosity, the compound as the first component The preferable ratio of (2) is 50% by weight or less. A further preferable ratio is in the range of 10% by weight to 45% by weight. A particularly preferred ratio is in the range of 15% by weight to 40% by weight.

Based on the weight of the host nematic liquid crystal composition, in order to adjust the optical anisotropy, the preferred ratio of the compound (3) as the second component is 30% by weight or more. In order not to reduce the dielectric anisotropy, it is used as the second component The preferred ratio of the compound (3) is 90% by weight or less. A further preferred ratio is in the range of 40% by weight to 85% by weight. A particularly preferred ratio is in the range of 45% by weight to 80% by weight.

Based on the weight of the host nematic liquid crystal composition, in order to increase the dielectric anisotropy, the preferred ratio of the compound (4) as the third component is 10% by weight or more, in order not to increase the viscosity and not to increase the minimum temperature, as The preferable ratio of the compound (4) of the third component is 50% by weight or less.

Fourth, preferable additives and component compounds are shown. Optically active compounds preferable as additives are the compound (1-1) to the compound (1-6) described in item 3. Among these optically active compounds, at least one is preferably compound (1-2), compound (1-3), or compound (1-4). The most preferred optically active compound is (1-4).

The preferred compounds as the first component are the compound (2-1) to the compound (2-23) described in Item 5. Among these compounds, at least one is preferably compound (2-1), compound (2-2), compound (2-7), or compound (2-9). More preferably, it is the compound (2-7).

Preferred compounds as the second component are the compounds (3-1) to (3-27) described in Item 7. Among these compounds, preferably at least one is compound (3-1), compound (3-6), compound (3-7), compound (3-9), compound (3-17), compound (3-18) ), compound (3-20), compound (3-23), compound (3-24), compound (3-27), or compound (3-28).

Preferred compounds as the third component are the compounds (4-1) to (4-18) described in Item 9. Among these compounds, it is preferred that at least one is compound (4-2), compound (4-3), compound (4-4), compound (4-5), compound (4-9), compound (4-10) ), compound (4-14), compound (4-15), compound (4-16), compound (4-18), or compound (4-19). More preferably, it is a compound (4-2), a compound (4-5), a compound (4-9), a compound (4-15), or a compound (4-19).

Fifth, the additives that can be added to the composition will be described. Such additives are optically active compounds other than formula (1), antioxidants, ultraviolet absorbers, pigments, defoamers, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds, and the like.

Examples of optically active compounds other than formula (1) are compound (5-1) to compound (5-5) and the like. The preferable ratio of the optically active compound other than Formula (1) is about 5 weight% or less. A further preferable ratio is in the range of about 0.01% by weight to about 2% by weight.

In order to prevent a decrease in specific resistance caused by heating in the atmosphere, or to maintain a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature after using the element for a long time, the compound ( 6-1) Antioxidants such as compound (6-3) are added to the composition.

Since the compound (6-2) 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 using the device for a long time. In order to obtain the effect, the preferable ratio of the antioxidant is about 50 ppm or more, and in order not to lower the upper limit temperature or to increase the lower limit temperature, the preferable ratio of the antioxidant is about 600 ppm or less. A further preferred ratio is in the range of about 100 ppm to about 300 ppm.

Preferred examples of ultraviolet absorbers are benzophenone derivatives, benzoate derivatives, triazole derivatives, and the like. In addition, light stabilizers such as sterically hindered amines are also preferred. Preferred examples of the light stabilizer are compound (7-1) to compound (7-16) and the like. In order to obtain the effect, the preferable ratio of these absorbents or stabilizers is about 50 ppm or more. In order not to lower the upper limit temperature or increase the lower limit temperature, the preferable ratio of these absorbents or stabilizers is about 10,000 ppm or less. . A further preferred ratio is in the range of about 100 ppm to about 10,000 ppm.

The matting agent is a compound that receives light energy absorbed by the liquid crystal compound and converts it into thermal energy to prevent the decomposition of the liquid crystal compound. Preferred examples of the matting agent are compound (8-1) to compound (8-7) and the like. In order to obtain the effect, the preferable ratio of these matting agents is about 50 ppm or more, and in order not to increase the lower limit temperature, the preferable ratio of these matting agents is about 20,000 ppm or less. A further preferred ratio is in the range of about 100 ppm to about 10,000 ppm.

Finally, the use of the composition will be explained. The composition of the present invention mainly has a lower limit temperature of about -10°C or lower, an upper limit temperature of about 70°C or higher, and an optical anisotropy in the range of about 0.10 to about 0.40. The device containing the composition has a large voltage holding ratio. The composition is suitable for liquid crystal devices. The composition is particularly suitable for reflective liquid crystal devices. By controlling the ratio of the component compounds, or by mixing other liquid crystal compounds, a composition having an optical anisotropy in the range of about 0.10 to about 0.20 can be prepared, and it can also be prepared having an optical anisotropy in the range of about 0.20 to about 0.30. The composition. The composition can be used as a cholesteric liquid crystal composition by adding an optically active compound.

[Example] The present invention is further described in detail through examples. The present invention is not limited by these examples. The present invention also includes a mixture obtained by mixing at least two of the compositions of the examples. The characteristics of the composition and the device were measured by the following method.

Measuring method: The characteristic is measured by the following method. Most of these methods are methods described in the JEITA standard (JEITA·ED-2521B) reviewed and formulated by the Japan Electronics and Information Technology Industries Association (JEITA), or modified methods. The TN (twisted nematic) element used in the measurement was not equipped with a thin film transistor (TFT).

(1) The upper limit temperature of the nematic phase (NI; ℃) or the upper limit temperature of the cholesteric phase (N*I; ℃): Place the sample on the heating plate of the melting point measuring device including the polarizing microscope at 1℃/ Heating is carried out at a rate of minutes. The temperature at which a part of the sample changes from a nematic phase or a cholesteric phase to an isotropic liquid is measured. The upper limit temperature of the nematic phase or the cholesteric phase is sometimes referred to simply as the "upper limit temperature".

(2) The lower limit temperature of the nematic phase (T _C ; ℃) or the lower limit temperature of the cholesteric phase (T _C ; ℃): Put the sample with the nematic phase or the cholesteric phase into a glass bottle and place it at 0 After storing for 10 days in a freezer at -10°C, -20°C, -30°C, and -40°C, the liquid crystal phase was observed. For example, when the sample maintains a nematic phase at -20°C and changes to a crystalline or smectic phase at -30°C, it is described as T _C <-20°C. Sometimes the lower limit temperature of the nematic phase or the cholesteric phase is simply referred to as the "lower limit temperature".

(3) Viscosity (bulk viscosity; η; measured at 20°C; mPa·s): The E-type rotary viscometer manufactured by Tokyo Keiki Co., Ltd. was used for the measurement.

(4) Optical anisotropy (refractive index anisotropy; Δn; measured at 25°C): For the main nematic liquid crystal composition, use light with a wavelength of 589 nm and use Abbe with a polarizing plate mounted on the eyepiece Refractometer for measurement. After rubbing the surface of the main shaft in one direction, drop the sample onto the main shaft. Measure the refractive index n∥ when the direction of polarized light is parallel to the direction of rubbing. Measure the refractive index n⊥ when the direction of polarized light is perpendicular to the direction of rubbing. The value of optical anisotropy is calculated according to the formula of Δn=n∥-n⊥.

(5) Dielectric anisotropy (Δε; measured at 25°C): The measurement was performed using a main nematic liquid crystal composition. The sample was placed in a TN device with a gap between two glass substrates (cell gap) of 9 μm and a twist angle of 80 degrees. A sine wave (10 V, 1 kHz) was applied to the element, and the dielectric constant (ε∥) in the long axis direction of the liquid crystal molecules was measured after 2 seconds. A sine wave (0.5 V, 1 kHz) was applied to the element, and the dielectric constant (ε⊥) in the short axis direction of the liquid crystal molecules was measured after 2 seconds. The value of dielectric anisotropy is calculated according to the formula Δε=ε∥-ε⊥.

(6) Specific resistance (ρ; measured at 25°C; Ωcm): Put 1.0 mL of the sample in the container including the electrode. A direct current voltage (10 V) was applied to the container, and the direct current after 10 seconds was measured. The specific resistance is calculated according to the following formula. (Specific resistance)={(voltage)×(capacitance of container)}/{(DC current)×(dielectric constant of vacuum)}

(7) Selection of reflection wavelength (λ; measured at 25°C; nm): The selection of reflection wavelength λ refers to the method of measuring the pitch length on page 196 of "Liquid Crystal Handbook" (published in 2000, Maruzen). Determination. The device used in the measurement is V650DS (manufactured by JASCO). First, perform parallel alignment processing on the unit so that the screw axis becomes a direction perpendicular to the unit. Linearly polarized light (wavelength: 300 nm to 800 nm) was incident on the cell so that the incident angle was 5°, the detector was set to -5°, and the reflected light was measured. In the reflected light, the wavelength of one of the left and right polarization components is specifically reflected. The peak top of the measurement result is set to 100%, and two points of the wavelength that become 50% are recorded. This time, the value obtained by adding the two points of wavelength and halving the value is called the selective reflection wavelength.

Examples of the composition are shown below. Liquid crystal compounds are represented by symbols based on the definition in Table 3 below. In Table 3, the three-dimensional configuration related to 1,4-cyclohexylene is the trans configuration. The number in parentheses after the symbolized compound indicates the chemical formula to which the compound belongs. The symbol (-) refers to other liquid crystal compounds. The ratio (percentage) of the liquid crystal compound is the weight percentage (% by weight) based on the weight of the main nematic liquid crystal composition containing no additives. Finally, the characteristic values of the composition are summarized.

主體向列液晶組成物A的物性值為NI=89.1℃；比電阻ρ=1.0×10¹² Ω·cm；Δn=0.237；Δε=25.8。 在主體向列液晶組成物A中添加2.616重量份之後所示的化合物（1-4-a）而成的膽甾醇型液晶組成物A-1的物性值為N*I=86.3℃；選擇反射波長=627 nm。 另外，在主體向列液晶組成物A中添加3.030重量份之後所示的化合物（1-4-b）而成的膽甾醇型液晶組成物A-2的物性值為N*I=85.9℃；選擇反射波長=547 nm。 進而，在主體向列液晶組成物A中添加3.710重量份之後所示的化合物（1-4-a）而成的膽甾醇型液晶組成物A-3的物性值為N*I=85.5℃；選擇反射波長=456 nm。

另外，在主體向列液晶組成物A中添加1.78重量份之前所示的化合物（1-4-a）而成的膽甾醇型液晶組成物A-4的物性值為N*I=86.9℃，選擇反射波長的溫度依存性為如下所述，由溫度變化引起的選擇反射波長的變動小（0.6 nm/℃）。   10℃ 20℃ 30℃ 40℃ 50℃ 60℃ 70℃ 選擇反射波長（nm） 760 755 750 730 725 724 722 [Example 1] Main body nematic liquid crystal composition A

The physical property value of the host nematic liquid crystal composition A is NI=89.1°C; specific resistance ρ=1.0×10 ¹² Ω·cm; Δn=0.237; Δε=25.8. The physical property value of the cholesteric liquid crystal composition A-1 obtained by adding 2.616 parts by weight of the compound (1-4-a) to the host nematic liquid crystal composition A is N*I=86.3°C; selective reflection Wavelength = 627 nm. In addition, the physical property value of the cholesteric liquid crystal composition A-2 obtained by adding 3.030 parts by weight of the compound (1-4-b) shown later to the host nematic liquid crystal composition A is N*I=85.9°C; Choose reflection wavelength = 547 nm. Furthermore, the physical property value of the cholesteric liquid crystal composition A-3 obtained by adding 3.710 parts by weight of the compound (1-4-a) shown later to the host nematic liquid crystal composition A is N*I=85.5°C; Choose reflection wavelength = 456 nm.

In addition, the physical property value of the cholesteric liquid crystal composition A-4 obtained by adding 1.78 parts by weight of the compound (1-4-a) shown before to the host nematic liquid crystal composition A is N*I=86.9°C, The temperature dependence of the selective reflection wavelength is as follows, and the variation of the selective reflection wavelength due to temperature changes is small (0.6 nm/°C). 10℃ 20℃ 30℃ 40℃ 50°C 60℃ 70°C Select reflection wavelength (nm) 760 755 750 730 725 724 722

  20℃ 30℃ 40℃ 50℃ 55℃ 選擇反射波長（nm） 735 650 605 590 580 根據所述情況，若使用化合物（1）作為光學活性化合物，則通過少量添加便可將選擇反射波長調整為350 nm～800 nm，因此，不僅不會對向列液晶組成物的物性造成影響，而且所述選擇反射波長的溫度依存性小，因此可製備由溫度變化引起的顯示品質的劣化得到抑制的膽甾醇型液晶組成物。[Comparative Example 1] For the host nematic liquid crystal composition A, the optical fiber shown after adding 30 parts by weight was prepared so as to have the selective reflection wavelength equivalent to the selective reflection wavelength of the cholesteric liquid crystal composition A-4. A cholesteric liquid crystal composition AX composed of active compound X. The physical property value of the cholesteric liquid crystal composition AX is N*I=58.3°C, and the temperature dependence of the selective reflection wavelength is as follows. The variation of the selective reflection wavelength due to temperature changes is large (4.4 nm/°C).

20℃ 30℃ 40℃ 50°C 55°C Select reflection wavelength (nm) 735 650 605 590 580 According to the foregoing, if compound (1) is used as an optically active compound, the selective reflection wavelength can be adjusted to 350 nm to 800 nm by adding a small amount, so not only does it not affect the physical properties of the nematic liquid crystal composition, Furthermore, the temperature dependence of the selective reflection wavelength is small, and therefore, a cholesteric liquid crystal composition can be prepared in which deterioration of display quality due to temperature changes is suppressed.

主體向列液晶組成物B的物性值為NI=88.2℃；Δn=0.233；Δε=28.6。 與實施例1同樣地對主體向列液晶組成物B添加有化合物（1-4-a）或化合物（1-4-b）時的物性值為如下所述。 膽甾醇型 液晶組成物 化合物（1） 化合物（1） 添加重量份 N^* I[℃] 選擇反射波長 [nm] B-1 化合物（1-4-a） 2.589 85.3 631 B-2 化合物（1-4-b） 3.041 85.0 543 B-3 化合物（1-4-a） 3.701 84.5 454 [Example 2] Main body nematic liquid crystal composition B

The physical property values of the host nematic liquid crystal composition B were NI=88.2°C; Δn=0.233; Δε=28.6. In the same manner as in Example 1, the physical property values when the compound (1-4-a) or the compound (1-4-b) is added to the host nematic liquid crystal composition B are as follows. Cholesteric liquid crystal composition Compound (1) Compound (1) Add parts by weight N ^* I[℃] Select reflection wavelength [nm] B-1 Compound (1-4-a) 2.589 85.3 631 B-2 Compound (1-4-b) 3.041 85.0 543 B-3 Compound (1-4-a) 3.701 84.5 454

主體向列液晶組成物C的物性值為NI=79.8℃；Δn=0.231；Δε=20.8。 通過在主體向列液晶組成物C中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物C-1等。[Example 3] Main body nematic liquid crystal composition C

The physical property values of the host nematic liquid crystal composition C are NI=79.8°C; Δn=0.231; Δε=20.8. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition C, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition C-1, etc.

主體向列液晶組成物D的物性值為NI=82.0℃；Δn=0.238；Δε=16.6。 通過在主體向列液晶組成物D中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物D-1等。[Example 4] Main body nematic liquid crystal composition D

The physical property values of the host nematic liquid crystal composition D are NI=82.0°C; Δn=0.238; Δε=16.6. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition D, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition D-1, etc.

主體向列液晶組成物E的物性值為NI=84.3℃；Δn=0.230；Δε=26.9。 通過在主體向列液晶組成物E中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物E-1等。[Example 5] Main body nematic liquid crystal composition E

The physical property values of the host nematic liquid crystal composition E are NI=84.3°C; Δn=0.230; Δε=26.9. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition E, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition E-1, etc.

主體向列液晶組成物F的物性值為NI=84.3℃；Δn=0.234；Δε=27.4。 通過在主體向列液晶組成物F中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物F-1等。[Example 6] Main body nematic liquid crystal composition F

The physical property values of the host nematic liquid crystal composition F are NI=84.3°C; Δn=0.234; Δε=27.4. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition F, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition F-1, etc.

主體向列液晶組成物G的物性值為NI=85.6℃；Δn=0.239；Δε=22.2。 通過在主體向列液晶組成物G中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物G-1等。[Example 7] Main body nematic liquid crystal composition G

The physical property values of the host nematic liquid crystal composition G are NI=85.6°C; Δn=0.239; Δε=22.2. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition G, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition G-1, etc.

主體向列液晶組成物H的物性值為NI=88.7℃；Δn=0.237；Δε=24.6。 通過在主體向列液晶組成物H中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物H-1等。[Example 8] Main body nematic liquid crystal composition H

The physical property values of the host nematic liquid crystal composition H are NI=88.7°C; Δn=0.237; Δε=24.6. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition H, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition H-1, etc.

主體向列液晶組成物I的物性值為NI=86.1℃；Δn=0.230；Δε=26.0。 通過在主體向列液晶組成物I中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物I-1等。[Example 9] Main body nematic liquid crystal composition I

The physical property values of the host nematic liquid crystal composition I are NI=86.1°C; Δn=0.230; Δε=26.0. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition I, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition I-1, etc.

主體向列液晶組成物J的物性值為NI=89.7℃；Δn=0.232；Δε=27.3。 通過在主體向列液晶組成物J中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物J-1等。[Example 10] Main body nematic liquid crystal composition J

The physical property values of the host nematic liquid crystal composition J were NI=89.7°C; Δn=0.232; Δε=27.3. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition J, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition J-1, etc.

主體向列液晶組成物K的物性值為NI=87.1℃；Δn=0.230；Δε=30.3。 通過在主體向列液晶組成物K中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物K-1等。[Example 11] Main body nematic liquid crystal composition K

The physical property values of the host nematic liquid crystal composition K are NI=87.1°C; Δn=0.230; Δε=30.3. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition K, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition K-1, etc.

主體向列液晶組成物L的物性值為NI=90.9℃；Δn=0.239；Δε=30.2。 通過在主體向列液晶組成物L中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物L-1等。[Example 12] Main body nematic liquid crystal composition L

The physical property values of the host nematic liquid crystal composition L are NI=90.9°C; Δn=0.239; Δε=30.2. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition L, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition L-1, etc.

主體向列液晶組成物M的物性值為NI=93.2℃；Δn=0.240；Δε=28.4。 通過在主體向列液晶組成物M中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物M-1等。[Example 13] Main body nematic liquid crystal composition M

The physical property values of the host nematic liquid crystal composition M are NI=93.2°C; Δn=0.240; Δε=28.4. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition M, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition M-1, etc.

主體向列液晶組成物N的物性值為NI=91.9℃；Δn=0.209；Δε=30.3。 通過在主體向列液晶組成物N中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物N-1等。[Example 14] Main body nematic liquid crystal composition N

The physical property values of the host nematic liquid crystal composition N are NI=91.9°C; Δn=0.209; Δε=30.3. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition N, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition N-1, etc.

主體向列液晶組成物O的物性值為NI=90.1℃；Δn=0.178；Δε=33.0。 通過在主體向列液晶組成物O中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物O-1等。[Example 15] Main body nematic liquid crystal composition O

The physical property values of the host nematic liquid crystal composition O are NI=90.1°C; Δn=0.178; Δε=33.0. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition O, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition O-1, etc.

主體向列液晶組成物P的物性值為NI=83.5℃；Δn=0.170；Δε=32.1。 與實施例1同樣地在主體向列液晶組成物P中添加有化合物（1-4-a）時的物性值為如下所述。 膽甾醇型 液晶組成物 化合物（1） 化合物（1） 添加重量份 N^* I[℃] 選擇反射波長 [nm] P-1 化合物（1-4-a） 2.454 82.3 634 P-2 化合物（1-4-a） 2.565 82.2 610 P-3 化合物（1-4-a） 2.800 81.7 562 P-4 化合物（1-4-a） 3.336 80.8 460 [Example 16] Main body nematic liquid crystal composition P

The physical property values of the host nematic liquid crystal composition P are NI=83.5°C; Δn=0.170; Δε=32.1. As in Example 1, the physical property values when the compound (1-4-a) is added to the host nematic liquid crystal composition P are as follows. Cholesteric liquid crystal composition Compound (1) Compound (1) Add parts by weight N ^* I[℃] Select reflection wavelength [nm] P-1 Compound (1-4-a) 2.454 82.3 634 P-2 Compound (1-4-a) 2.565 82.2 610 P-3 Compound (1-4-a) 2.800 81.7 562 P-4 Compound (1-4-a) 3.336 80.8 460

主體向列液晶組成物Q的物性值為NI=86.0℃；Δn=0.148；Δε=30.0。 通過在主體向列液晶組成物Q中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物Q-1等。[Example 17] Main body nematic liquid crystal composition Q

The physical property value of the host nematic liquid crystal composition Q is NI=86.0°C; Δn=0.148; Δε=30.0. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition Q, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition Q-1, etc.

主體向列液晶組成物R的物性值為NI=82.8℃；Δn=0.154；Δε=30.3。 通過在主體向列液晶組成物R中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物R-1等。[Example 18] Host nematic liquid crystal composition R

The physical property values of the host nematic liquid crystal composition R are NI=82.8°C; Δn=0.154; Δε=30.3. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition R, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition R-1, etc.

主體向列液晶組成物S的物性值為NI=84.1℃；Δn=0.151；Δε=30.0。 通過在主體向列液晶組成物S中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物S-1等。[Example 19] Main body nematic liquid crystal composition S

The physical property values of the host nematic liquid crystal composition S are NI=84.1°C; Δn=0.151; Δε=30.0. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition S, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition S-1, etc.

主體向列液晶組成物T的物性值為NI=83.5℃；Δn=0.132；Δε=18.3。 通過在主體向列液晶組成物T中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物T-1等。[Example 20] Main body nematic liquid crystal composition T

The physical property values of the host nematic liquid crystal composition T are NI=83.5°C; Δn=0.132; Δε=18.3. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition T, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition T-1, etc.

主體向列液晶組成物U的物性值為NI=83.0℃；Δn=0.131；Δε=20.2。 通過在主體向列液晶組成物U中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物U-1等。[Example 21] Main body nematic liquid crystal composition U

The physical property values of the host nematic liquid crystal composition U are NI=83.0°C; Δn=0.131; Δε=20.2. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition U, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition U-1, etc.

主體向列液晶組成物V的物性值為NI=83.9℃；Δn=0.132；Δε=20.6。 與實施例1同樣地在主體向列液晶組成物V中添加有化合物（1-4-a）時的物性值為如下所述。 膽甾醇型 液晶組成物 化合物（1） 化合物（1） 添加重量份 N^* I[℃] 選擇反射波長 [nm] V-1 化合物（1-4-a） 2.410 81.3 650 V-2 化合物（1-4-a） 2.572 81.1 611 V-2 化合物（1-4-a） 2.800 81.0 564 V-3 化合物（1-4-a） 3.200 80.7 501 [Example 22] Main body nematic liquid crystal composition V

The physical property values of the host nematic liquid crystal composition V are NI=83.9°C; Δn=0.132; Δε=20.6. In the same manner as in Example 1, the physical property values when the compound (1-4-a) is added to the host nematic liquid crystal composition V are as follows. Cholesteric liquid crystal composition Compound (1) Compound (1) Add parts by weight N ^* I[℃] Select reflection wavelength [nm] V-1 Compound (1-4-a) 2.410 81.3 650 V-2 Compound (1-4-a) 2.572 81.1 611 V-2 Compound (1-4-a) 2.800 81.0 564 V-3 Compound (1-4-a) 3.200 80.7 501

主體向列液晶組成物W的物性值為NI=85.1℃；Δn=0.228；Δε=26.5。 通過在主體向列液晶組成物W中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物W-1等。[Example 23] Main body nematic liquid crystal composition W

The physical property values of the host nematic liquid crystal composition W are NI=85.1°C; Δn=0.228; Δε=26.5. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition W, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition W-1, etc.

主體向列液晶組成物X的物性值為NI=86.8℃；Δn=0.223；Δε=29.4。 通過在主體向列液晶組成物X中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物X-1等。[Example 24] Main body nematic liquid crystal composition X

The physical property value of the host nematic liquid crystal composition X is NI=86.8°C; Δn=0.223; Δε=29.4. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition X, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition X-1, etc.

主體向列液晶組成物Y的物性值為NI=87.5℃；Δn=0.221；Δε=28.7。 通過在主體向列液晶組成物Y中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物Y-1等。[Example 25] Main body nematic liquid crystal composition Y

The physical property value of the host nematic liquid crystal composition Y is NI=87.5°C; Δn=0.221; Δε=28.7. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition Y, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition Y-1, etc.

主體向列液晶組成物Z的物性值為NI=91.0℃；Δn=0.233；Δε=30.2。 通過在主體向列液晶組成物Z中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物Z-1等。[Example 26] Main body nematic liquid crystal composition Z

The physical property values of the bulk nematic liquid crystal composition Z are NI=91.0°C; Δn=0.233; Δε=30.2. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition Z, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition Z-1, etc.

主體向列液晶組成物AA的物性值為NI=89.6℃；Δn=0.211；Δε=30.6。 通過在主體向列液晶組成物AA中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物AA-1等。[Example 27] Main body nematic liquid crystal composition AA

The physical property value of the host nematic liquid crystal composition AA is NI=89.6°C; Δn=0.211; Δε=30.6. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition AA, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition AA-1, etc.

主體向列液晶組成物BB的物性值為NI=82.6℃；Δn=0.200；Δε=24.6。 通過在主體向列液晶組成物BB中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物BB-1等。[Example 28] Main body nematic liquid crystal composition BB

The physical property values of the bulk nematic liquid crystal composition BB are NI=82.6°C; Δn=0.200; Δε=24.6. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition BB, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition BB-1, etc.

主體向列液晶組成物CC的物性值為NI=83.5℃；Δn=0.219；Δε=24.8。 通過在主體向列液晶組成物CC中添加2.5重量份～4.0重量份之前所示的化合物（1-4-a）或化合物（1-4-b），可製備選擇反射波長經調整為350 nm～800 nm的膽甾醇型液晶組成物CC-1等。[Example 29] Main body nematic liquid crystal composition CC

The physical property values of the bulk nematic liquid crystal composition CC are NI=83.5°C; Δn=0.219; Δε=24.8. By adding 2.5 parts by weight to 4.0 parts by weight of the compound (1-4-a) or compound (1-4-b) shown before to the host nematic liquid crystal composition CC, the selective reflection wavelength can be adjusted to 350 nm ~800 nm cholesteric liquid crystal composition CC-1, etc.

Compared with the comparative example, the optically active compound exhibits selective reflection with a small amount of addition, and further, the temperature dependence of the selective reflection wavelength is suppressed to be low, and N*I can be maintained at a high temperature, and a large Δn and Δε can be obtained. The cholesteric liquid crystal.

none.

none.

none.

Claims (14)

A cholesteric liquid crystal composition containing: as an additive, at least one optically active compound selected from the group of compounds represented by formula (1), and a first component selected from a compound represented by formula (2) At least one compound in the group of and at least one compound selected from the group of compounds represented by formula (3) as the second component,

In formula (1), R ¹¹ and R ^{12 are} independently hydrogen, halogen, -C≡N, -N=C=O, -N=C=S, -SF ₅ , or an alkyl group having 1 to 10 carbon atoms , In the alkyl group, at least one -CH ₂ -may be substituted by -O-, -COO-, -OCO-, -CH=CH-, or -C≡C-, and in these groups, at least one hydrogen may be substituted by Fluorine or chlorine substitution; ring A ¹¹ and ring A ^{12 are} independently 1,4-cyclohexylene, 1,4-phenylene, 1,3-dioxane-2,5-diyl, tetrahydropyran -2,5-diyl, tetrahydropyran-3,5-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl, or 1,4-bicyclo-(2,2, 2)-Octylene, in these rings, at least one hydrogen may be replaced by fluorine or chlorine; Z ¹¹ and Z ^{12 are} independently a single bond or an alkylene group with 1 to 20 carbon atoms. In the alkylene group, at least One -CH ₂ -can be substituted by -O-, -CO-, -COO-, -OCO-, -CH=CH-, or -C≡C-, in these groups, at least one hydrogen can be replaced by fluorine or chlorine ; X ¹¹ and X ^{12 are} independently a single bond, ethylene, methyleneoxy, carbonyloxy or difluoromethyleneoxy; n ¹¹ and n ^{12 are} independently 2, 3 or 4, there are many The ring A ¹¹ , ring A ¹² , Z ¹¹ or Z ^{12 of} each may be the same or different; in formula (2) and formula (3), R ² , R ³¹ and R ^{32 are} independently carbon numbers 1-12 The alkyl group, the alkoxy group having 1 to 12 carbons, or the alkenyl group having 2 to 12 carbons; ring A ^{2 is} independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro- 1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2 ,5-diyl, 1,3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl; ring A ^{3 is} independently 1,4-cyclohexylene, 1, 4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, or 2,6-difluoro-1,4-phenylene; Z ² and Z ^{3 are} independently a single bond, ethylene, ethylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, ethynylene, or tetrafluoroethylene; X ² is -C≡N or -N=C=S; Y ²¹ and Y ^{22 are} independently hydrogen or fluorine; n ² is 1 or 2. When n ² represents 2, there are multiple rings A ² or Z ² Each may be the same or different; n ³ is 1, 2 or 3, and when n ³ represents 2 or 3, a plurality of rings A ³ or Z ³ may be the same or different. The cholesteric liquid crystal composition according to claim 1, further containing as a third component at least one compound selected from the group of compounds represented by formula (4),

In formula (4), R ⁴ is an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; ring A ⁴¹ and ring A ^{42 are} independently 1, 4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1, 4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, or tetrahydropyran-2,5-diyl Group; Ring A ⁴³ is 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, or 2,6-difluoro-1 ,4-phenylene; Z ⁴¹ , Z ⁴² and Z ^{43 are} independently a single bond, ethylene, ethylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, or tetrafluoro Ethylene group; Y ⁴¹ and Y ^{42 are} independently hydrogen or fluorine; X ⁴ is fluorine, chlorine, an alkyl group with 1 to 12 carbons in which at least one hydrogen is substituted by halogen, and at least one hydrogen is substituted with halogen to have a carbon number of 1 to The alkoxy group of 12, or the alkenyl group of 2-12 carbons in which at least one hydrogen is substituted by halogen; n ⁴ is 0, 1 or 2, and when n ⁴ represents 2, there are multiple rings A ⁴¹ and Z ⁴¹ can be the same or different. The cholesteric liquid crystal composition according to claim 1 or claim 2, which contains, as an additive, at least one optically selected from the group of compounds represented by formula (1-1) to formula (1-6) Active compound,

In formulas (1-1) to (1-6), R ¹¹ and R ^{12 are} independently hydrogen, halogen, -C≡N, -N=C=O, -N=C=S, -SF ₅ , Or an alkyl group with 1 to 10 carbon atoms, in which at least one -CH ₂ -may be substituted with -O-, -COO-, -OCO-, -CH=CH-, or -C≡C-, Among these groups, at least one hydrogen may be substituted with fluorine or chlorine. The cholesteric liquid crystal composition according to claim 1 or 2, wherein the ratio of the additive is in the range of 0.1 to 10 parts by weight based on the weight of the liquid crystal composition. The cholesteric liquid crystal composition according to claim 1 or claim 2, which contains as a first component at least one selected from the group of compounds represented by formula (2-1) to formula (2-23) Compound,

In formulas (2-1) to (2-23), R ^{2 is} independently an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; X ^{2 is} independently -C≡N or -N=C=S; Y ²¹ and Y ^{22 are} independently hydrogen or fluorine. The cholesteric liquid crystal composition according to claim 1 or 2, wherein the ratio of the first component is in the range of 5% by weight to 50% by weight based on the weight of the liquid crystal composition. The cholesteric liquid crystal composition according to claim 1 or claim 2, containing as a second component at least one selected from the group of compounds represented by formula (3-1) to formula (3-28) Compound,

In formulas (3-1) to (3-28), R ³¹ and R ^{32 are} independently an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkene having 2 to 12 carbons base. The cholesteric liquid crystal composition according to claim 1 or 2, wherein the ratio of the second component is in the range of 30% by weight to 90% by weight based on the weight of the liquid crystal composition. The cholesteric liquid crystal composition according to claim 2 further contains as a third component at least one compound selected from the group of compounds represented by formula (4-1) to formula (4-19),

In formulas (4-1) to (4-19), R ⁴ is an alkyl group having 1 to 12 carbons, an alkoxy group having 1 to 12 carbons, or an alkenyl group having 2 to 12 carbons; Y ⁴¹ and Y ^{42 is} independently hydrogen or fluorine; X ⁴ is fluorine, chlorine, an alkyl group having 1 to 12 carbons in which at least one hydrogen is substituted by halogen, an alkoxy group having 1 to 12 carbons in which at least one hydrogen is substituted by halogen, or Alkenyl having 2-12 carbons in which at least one hydrogen is substituted by halogen. The cholesteric liquid crystal composition according to claim 2, wherein the ratio of the third component is in the range of 10% by weight to 50% by weight based on the weight of the liquid crystal composition. The cholesteric liquid crystal composition according to claim 1 or claim 2, wherein the optical anisotropy at a wavelength of 589 nm measured at 25°C is in the range of 0.10 to 0.40, and the measurement frequency is at 25°C at 1 kHz The dielectric anisotropy is in the range of 10-60. The cholesteric liquid crystal composition according to claim 1 or claim 2, wherein the reflection wavelength is selected to be in the range of 350 nm to 800 nm. A liquid crystal element containing the cholesteric liquid crystal composition according to any one of Claims 1 to 12. A use of a cholesteric liquid crystal composition for a liquid crystal element. The cholesteric liquid crystal composition is the cholesteric liquid crystal composition according to any one of claim 1 to claim 12.