TW201422781A - Nematic liquid crystal composition and liquid crystal display element using the same - Google Patents

Abstract

The present invention provides a composition containing one kind of, or two or more kinds of a compound represented by the general formula (i) and containing one kind of, or two or more kinds of a compound represented by the general formula (ii), wherein the content of the composition represented by the general formula (i) is 5 to 30% and the content of the composition represented by the general formula (ii) is 5 to 25%. (In the formula, each of Ri1, Ri2, and Rii1 independently represents an alkyl group having 1 to 8 carbon atoms; one of, or two or more -CH2-, which are not adjacent to each other, in the alkyl group may be substituted by -CH=CH-, -C ≡ C-, -O-, -CO-, -COO- or - OCO-; each of Xi1 to Xi6 independently represents a hydrogen atom or a fluorine atom; and Xii1 independently represents a hydrogen atom, a fluorine atom or a chlorine atom.)

Description

Nematic liquid crystal composition and liquid crystal display element using same

In particular, the present invention relates to a nematic liquid crystal composition which exhibits a positive dielectric anisotropy (Δε) as a liquid crystal display material, and a liquid crystal display element using the same.

The liquid crystal display device is used for various measuring devices, such as a clock and a desktop computer, a panel for a car, a word processor, an electronic notebook, a printer, a computer, a television, a clock, an advertisement display panel, and the like. As a liquid crystal display method, among them, a TN (twisted nematic) type, an STN (super twisted nematic) type, a TFT (thin film transistor) vertical alignment type, or an IPS (in-plane switching) type or the like is used. The liquid crystal composition used in these liquid crystal display elements is required to exhibit stability in response to moisture, air, heat, light, etc., and to display a liquid crystal phase in a wide temperature range as wide as possible at room temperature. Low viscosity and low drive voltage. Further, in order to make dielectric constant anisotropy (Δε), refractive index anisotropy (Δn), and the like the most suitable values for each display element, the liquid crystal composition is from several types to several tens of types. Composition of compounds.

In a horizontal alignment type display such as a TN type, an STN type, or an IPS (in-plane switching type), a liquid crystal composition having a positive Δ ε is used. Further, it has been reported that when the voltage is not applied, the liquid crystal composition having positive Δ ε is vertically aligned, and the driving mode is displayed by applying a lateral electric field, and the necessity of the liquid crystal composition having positive Δ ε is further increased. .

Further, in such a driving method, low voltage driving, high speed response, and a wide operating temperature range are required. That is, △ ε is required to be positive and absolute Large, viscosity (η) small, high nematic phase-isotropic liquid phase transfer temperature (Tni). Further, from the setting of the product Δn × d of Δn and the cell gap (d), it is necessary to adjust the Δn of the liquid crystal composition to the cell gap to be adjusted to an appropriate range. Further, when a liquid crystal display element is applied to a television or the like, a liquid crystal composition having a small rotational viscosity (γ1) is required because of high speed responsiveness.

The composition of the liquid crystal composition is, for example, a liquid crystal composition containing a compound represented by the following formulas (A-1a) to (A-1b) and a compound represented by the formula (B-1a) to (B-1c). (Refer to Patent Document 1),

Or a liquid crystal composition containing a compound represented by the following formula (A-3), a compound represented by the formula (A-2a) to (A-2b), and a compound represented by the formula (B-2a) (refer to the patent literature) 2).

The liquid crystal composition is characterized in that the liquid crystal compound having a positive Δ ε has three ring structures or a -CF ₂ O- structure as a linking group.

On the other hand, the use of the liquid crystal display element has been expanded, and the use method and manufacturing method have also been largely changed. In order to cope with such changes, it is required to optimize the characteristics other than the basic physical property values. In other words, a liquid crystal display device using a liquid crystal composition is widely used in a VA type or an IPS type, and a display element having a size of 50 Å or more is also put into practical use. With the increase in the size of the substrate, the method of injecting the liquid crystal composition into the substrate has been changed from the conventional vacuum injection method to the ODF (One Drop Fill) method, but the liquid crystal composition is dropped onto the substrate. The problem of dropping the traces leading to a decrease in the display quality is apparent.

Further, in the liquid crystal display element manufacturing step of the ODP method, it is necessary to drip the optimum liquid crystal injection amount in accordance with the size of the liquid crystal display element. When the deviation between the injection amount and the optimum value is large, the balance of the refractive index or the driving electric field of the liquid crystal display element which is designed in advance may collapse, and display defects such as unevenness or poor contrast may occur.

In particular, the small liquid crystal display elements used in the most popular smart phones have the most suitable values for the most suitable liquid crystal injection. The deviation control within a certain range is inherently difficult.

Therefore, in order to keep the yield of the liquid crystal display element high, for example, it is necessary to have a small pressure change or a small impact in the dropping device generated when the liquid crystal is dropped, and it is necessary to continuously drop the liquid crystal in a stable manner for a long period of time.

In the liquid crystal composition used for the liquid crystal display device driven by the active matrix driven by the TFT element or the like, in addition to the characteristics and performance required for the liquid crystal display element while maintaining high-speed response performance, etc., the liquid crystal display device has a high ratio which is always attached. The resistance value or the high voltage holding ratio or the stability to an external stimulus such as light or heat is also required to consider the development of a manufacturing method of the liquid crystal display element.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2008-7752 (Embodiment 1)

[Patent Document 2] Japanese Laid-Open Patent Publication No. 2011-153202 (Embodiment 3)

The problem to be solved by the present invention is to provide a composition in which Δε is a positive value and is stable to heat or light.

The present inventors reviewed various compounds and found that the above problems can be solved by combining specific compounds, and the present invention has finally been completed.

In other words, the present invention provides a composition comprising one or more compounds represented by the following formula (i), and containing one or more compounds represented by the following formula (ii). The content of the compound represented by the following formula (i) is 5 to 30%, and the content of the compound represented by the following formula (ii) is 5 to 25%;

(wherein R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may be independently -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substitution, X ⁱ¹ ~X ⁱ⁶ each independently represent a hydrogen atom or a fluorine atom, and X ⁱⁱ¹ represents a hydrogen atom, Fluorine or chlorine atom).

Since the composition of the present invention has low viscosity and exhibits a stable nematic phase at a low temperature, the change in specific resistance or voltage holding ratio after heating and after UV irradiation is extremely small, so that the product has high practicability and uses the TN type thereof. A liquid crystal display element of the like can achieve a high speed response. Further, in the process of the liquid crystal display device, it is very useful because it can stably exhibit performance and suppress display failure due to a program, and can be manufactured with high yield.

[Formation of the Invention]

The composition of the present invention contains a compound represented by the following formula (i).

(In the above formula (i), R ⁱ¹ and R ⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups are independently It may be substituted by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, and each of X ⁱ¹ -X ⁱ⁶ independently represents a hydrogen atom or a fluorine atom).

In the above formula (i), R ⁱ¹ and R ⁱ² are each independently preferably a linear alkyl group having 1 to 8 carbon atoms or a linear alkenyl group having 1 to 8 carbon atoms, more preferably a carbon number. The linear alkyl group of 1 to 5 or the linear alkenyl group having 1 to 5 carbon atoms is preferably a methyl group, an ethyl group, a propyl group, a butyl group or a pentyl group or a structure as described below. (where the pair of ring structures are bonded at the right end)

When the improvement of the response speed is emphasized, the alkenyl group is preferred, and when the reliability of the voltage holding ratio or the like when the liquid crystal composition is used is emphasized, the alkyl group is preferred.

In the formula (i), X ⁱ¹ to X ⁱ⁶ each independently represent a hydrogen atom or a fluorine atom. It is preferred that at least one of X ⁱ¹ to X ⁱ⁶ of the formula (i) is a fluorine atom. Specifically, for example, a compound represented by the following formulas (i-1) to (i-11) can be given.

The composition of the present invention may contain only one type of the compounds represented by the above formulas (i-1) to (i-11), or may contain two or more types, preferably in accordance with the required refractive index anisotropy. Or suitable combination at room temperature and solubility at freezing point.

Solubility must be noted due to the structure of the alkyl groups at both ends of the compound. A compound in which at least one is an ethyl group is preferred, and formula (i-1)~ The compound shown by (i-6) is more preferable. The compound selected from the compounds represented by the formula (i-1) and the formula (i-2) is preferably contained in an amount of 3% by mass or more, more preferably 5 in terms of the total amount of the composition of the present invention. The mass% or more is more preferably 3% by mass or more, more preferably 15% by mass or less, still more preferably 13% by mass or less, and preferably 1% by mass based on the total amount of the composition of the present invention. The compound selected from the compounds represented by the formula (i-3) and the formula (i-4) is more preferably 2% by mass or more, more preferably 15% by mass or less, still more preferably 13% by mass. In the following, the compound selected from the formula (i-5) and the formula (i-6) is preferably contained in an amount of 5% by mass or more based on the total amount of the composition of the present invention, and more preferably It is contained in an amount of 7% by mass or more, more preferably 8% by mass or more, particularly preferably 10% by mass or more, more preferably 17% by mass or less, still more preferably 15% by mass or less, and more preferably contains the formula (i). -1) the compound shown and the compound represented by the formula (i-3), and in this case, the total content ratio of these is preferably 5 in terms of the total amount of the composition of the present invention. More preferably, it is contained in an amount of 7% by mass or more, more preferably 8% by mass or more, more preferably 20% by mass or less, still more preferably 18% by mass or less, and more preferably contains a compound represented by the formula (i-1) and a formula (i) In the case of the compound of the present invention, the total content of the compound is preferably 10% by mass or more, more preferably 15% by mass or more, and particularly preferably the total content of the compound of the present invention. It is contained in an amount of 20% by mass or more, particularly preferably 23% by mass or more, more preferably 30% by mass or less, and still more preferably 28% by mass or less.

The type of the compound which can be combined is not particularly limited, but it is preferably one to five kinds of these compounds, more preferably one to four, and particularly preferably one to three. Also, due to the selected compound Since the molecular weight distribution is also effective in solubility, for example, one of the compounds represented by the formula (i-1) or the formula (i-2), the formula (i-3) or the formula (i-4) is preferably selected. Among the compounds shown, one of the compounds of the formula (i-5) or the formula (i-6), one of the compounds of the formula (i-8) or the formula (i-9) One type of compound is suitable for combination.

The compound represented by the above formula (i) may be contained in only one type or two or more types, but it is preferred to be appropriately combined according to the desired properties. The composition of the present invention preferably contains one to three kinds of the compounds represented by the formula (i), and more preferably one to two.

The content of the compound represented by the formula (i) is preferably from 5 to 30% by mass, more preferably 5% by mass or more, even more preferably 7% by mass or more, particularly preferably 8 parts by mass based on the total amount of the composition. % or more is preferably 30% by mass or less, more preferably 25% by mass or less, and still more preferably 20% by mass or less.

The composition of the present invention contains a compound represented by the following formula (ii). (In the above formula (ii), R ⁱⁱ¹ represents an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may independently be -CH=CH -, -C≡C-, -O-, -CO-, -COO- or ^-OCO- substituted, X ⁱⁱ¹ represents a hydrogen atom, a fluorine atom or a chlorine atom).

In the above formula (ii), R ⁱⁱ¹ is, for example, the same as those exemplified for R ⁱ¹ and R ⁱ² in the above formula (i).

In the present specification, as the 1,4-cyclohexylene group, a trans-1,4-cyclohexylene group is preferred.

X ^{ii1 of the} formula (ii) is preferably a fluorine atom. Specific examples thereof include compounds represented by the following formulas (ii-1) to (ii-4).

Although the molecular weight of these compounds differs depending on the alkyl structure at the terminal, the viscosity or Tni varies depending on the molecular weight, so that the appropriate content can be adjusted. For example, the compound represented by the formula (ii-2) is effective for increasing the Tni because of its large molecular weight, but the viscosity is also increased due to the large molecular weight. Therefore, the compound represented by the formula (ii-2) is preferably 2% by mass or more, more preferably 3% by mass or more, and most preferably 18% by mass or less, based on the total amount of the composition of the present invention. It is preferably 15% by mass or less, more preferably 12% by mass or less, and particularly preferably 10% by mass or less.

Furthermore, the composition of the present invention preferably contains 2% by mass or more of the compound represented by the formula (ii-1), more preferably 3% by mass or more, based on the total amount of the composition of the present invention. The amount is preferably 25% by mass or less, more preferably 23% by mass or less, particularly preferably 21% by mass or less, and particularly preferably 20% by mass or less.

The kind of the compound which can be combined is not particularly limited, but is preferably It is one type to three types of these compounds, and more preferably one type to two types.

The compound represented by the above formula (ii) may be contained in only one type or two or more types, but it is preferred to be appropriately combined according to the desired properties. The composition of the present invention preferably contains one to three kinds of the compounds represented by the formula (ii), more preferably one to two, and particularly preferably a compound of the formula (ii-1). And a compound represented by the formula (ii-2).

The content of the compound represented by the formula (ii) is preferably 12% by mass or more, more preferably 15% by mass or more, more preferably 15% by mass or more, based on the total amount of the composition. 25 mass% or less, more preferably 20 mass% or less, and still more preferably 18 mass% or less, and when focusing on the balance of Δε and Δn, it is preferably 3% by mass or more, and more preferably 5% by mass or more. It is preferably 13% by mass or less, more preferably 10% by mass or less, and still more preferably 9% by mass or less.

The liquid crystal composition of the present invention may contain one type or two or more types of compounds represented by the formula (L).

(wherein R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may independently be -CH= CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substituted, OL represents 0, 1, 2 or 3, and B ^L1 , B ^L2 and B ^L3 each independently represent (a) 1,4-cyclohexylene (one -CH ₂ - or two or more -CH ₂ - groups not present in this group may be substituted into -O-) and (b) 1,4 a group of a group consisting of a phenyl group (one of -CH= or a non-contiguous two or more -CH= may be substituted by -N=), the above-mentioned group (a), The groups (b) are each independently substituted by a cyano group, a fluorine atom or a chlorine atom, and L ^L1 and L ^L2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ - , -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C - When OL is 2 or 3, L ^{L2 is} present in plural, they may be the same or different, and when OL is 2 or 3, B ^{L3 is} present in a complex number, only the compound represented by formula (i) and formula ( Ii) except for the compounds shown).

The kind of the compound which can be combined is not particularly limited, but is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Further, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Further, in still another embodiment of the present invention, there are seven types. Furthermore, in another embodiment of the present invention, there are eight types. Further, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of the present invention, it is 10 or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (L) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 1% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 10%. Further, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 30%. Further, in another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 50%. Further, in still another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 60%. Further, in another embodiment of the present invention, it is 65%. Furthermore, in another embodiment of the present invention, it is 70%. Further, in still another embodiment of the present invention, it is 75%. Furthermore, in still another embodiment of the present invention, it is 80%.

Further, the upper limit of the preferable content is, for example, 95% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 85%. Furthermore, in still another embodiment of the present invention, it is 75%. Further, in still another embodiment of the present invention, it is 65%. Furthermore, in another embodiment of the present invention, it is 55%. Further, in another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 25%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the above lower limit value is high and the upper limit value is high. In addition, when the liquid crystal composition of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, the above lower limit value and upper limit value are lowered. It is better for the lower ones.

R ^L1 and R ^L2 are preferably a linear alkyl group having 1 to 5 carbon atoms and a linear carbon number of 1 to 4 when the ring to which the ring is bonded is a phenyl group (aromatic). An alkoxy group and an alkenyl group having 4 to 5 carbon atoms, wherein the ring to which the bond is bonded is cyclohexane, pyran and In the case of a saturated ring structure such as an alkane or the like, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear carbon atom number 2 are preferable. 5 alkenyl groups.

When the chemical stability of the liquid crystal composition is required for the compound represented by the formula (L), it is preferred that the compound does not contain a chlorine atom in its molecule.

The compound represented by the formula (L) is preferably, for example, a compound selected from the group of compounds represented by the formula (I).

R ¹¹ -A ¹¹ -A ¹² -R ¹² (I) (wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or a carbon atom; The number of 2 to 5 alkenyl groups, A ¹¹ and A ¹² each independently represent 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 3-fluoro-1 , 4-phenylene).

The kind of the compound which can be combined is not particularly limited, but it is suitably used in combination according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Further, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types.

In the liquid crystal composition of the present invention, the compound represented by the formula (I) The content must be appropriately adjusted in accordance with the properties required for low temperature solubility, transfer temperature, electrical reliability, birefringence, process suitability, dropping trace, cauterization, dielectric anisotropy, and the like.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 18%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 29%. Furthermore, in another embodiment of the present invention, it is 35%. Further, in still another embodiment of the present invention, it is 42%. Furthermore, in still another embodiment of the present invention, it is 47%. Further, in another embodiment of the present invention, it is 53%. Furthermore, in another embodiment of the present invention, it is 56%. Further, in still another embodiment of the present invention, it is 60%. Furthermore, in still another embodiment of the present invention, it is 65%.

Further, the upper limit of the preferable content is, for example, 75% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 65%. Furthermore, in still another embodiment of the present invention, it is 55%. Further, in still another embodiment of the present invention, it is 50%. Furthermore, in another embodiment of the present invention, it is 45%. Further, in another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the above lower limit value is high and the upper limit value is high. Furthermore, the Tni of the liquid crystal composition of the present invention is kept high, When a liquid crystal composition having good temperature stability is required, the above lower limit value is moderate and the upper limit value is preferably a moderate one. Further, in order to keep the driving voltage low, it is preferable to lower the above-described lower limit value and lower the upper limit value in order to increase the dielectric anisotropy.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-1).

(wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but it is suitably used in combination according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Further, in another embodiment of the present invention, it is five or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-1) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 18%. Furthermore, in still another embodiment of the present invention, it is 25%. Moreover, in another embodiment of the present invention, it is 29%. . Furthermore, in another embodiment of the present invention, it is 31%. Further, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 43%. Further, in another embodiment of the present invention, it is 47%. Furthermore, in another embodiment of the present invention, it is 50%. Further, in still another embodiment of the present invention, it is 53%. Furthermore, in still another embodiment of the present invention, it is 56%.

Further, the upper limit of the preferable content is, for example, 70% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 60%. Furthermore, in still another embodiment of the present invention, it is 50%. Further, in still another embodiment of the present invention, it is 45%. Furthermore, in another embodiment of the present invention, it is 40%. Further, in another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 26%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when the Tni of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, the above-mentioned lower limit value is moderate and the upper limit value is preferably a moderate one. Further, in order to keep the driving voltage low, it is preferable to lower the above-described lower limit value and lower the upper limit value in order to increase the dielectric anisotropy.

Further, the compound represented by the formula (I-1) is preferably a compound selected from the group of compounds represented by the formula (I-1-1).

(wherein R ¹² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-1-1) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, and dripping traces. The required performance of cauterization, dielectric anisotropy, etc., is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 2% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 11%. Further, in another embodiment of the present invention, it is 13%. Furthermore, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 32%. Furthermore, in still another embodiment of the present invention, it is 35%.

Further, the upper limit of the preferable content is, for example, 60% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 50%. Furthermore, in still another embodiment of the present invention, it is 40%. Further, in still another embodiment of the present invention, it is 35%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 15%.

Further, the compound represented by the formula (I-1-1) is preferably a compound selected from the group of compounds represented by the formula (1.1) to the formula (1.3), more preferably a formula (1.2) or a formula (1.3). The compound shown is particularly preferably a compound represented by the formula (1.3).

When the compounds represented by the formula (1.2) or the formula (1.3) are used singly, the compound represented by the formula (1.2) is improved in the response rate, and the compound represented by the formula (1.3) is effective. The content is in the range shown below, and it is preferable to form a liquid crystal composition having a high response speed and high electrical and optical reliability.

The total amount of the liquid crystal composition of the present invention is preferably 7% by mass or more of the compound represented by the formula (1.3), more preferably 9% by mass or more, and particularly preferably 11% by mass or more. It is particularly preferably contained in an amount of 15% by mass or more. Further, the ratio which can be contained at the maximum is preferably 35% by mass or less, more preferably 25% by mass or less, and still more preferably 20% by mass or less.

Further, the compound represented by the formula (I-1) is preferably a compound selected from the group of compounds represented by the formula (I-1-2).

(wherein R ¹² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but it is suitably used in combination according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of compound used, For example, in one embodiment of the present invention, it is one type. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-1-2) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, and dripping traces. The required performance of cauterization, dielectric anisotropy, etc., is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 7% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 18%. Furthermore, in still another embodiment of the present invention, it is 21%. Further, in another embodiment of the present invention, it is 24%. Furthermore, in another embodiment of the present invention, it is 27%. Further, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 34%. Further, in another embodiment of the present invention, it is 37%. Furthermore, in another embodiment of the present invention, it is 41%. Further, in still another embodiment of the present invention, it is 47%. Furthermore, in still another embodiment of the present invention, it is 50%.

Further, the upper limit of the preferable content is, for example, 60% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 45%. Further, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 35%. Further, in another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 25%. Moreover, in the present invention In still another embodiment, it is 20%.

Further, the compound represented by the formula (I-1-2) is preferably a compound selected from the group of compounds represented by the formula (2.1) to the formula (2.5), more preferably a formula (2.2) to a formula (2.5). ) the compound shown. In particular, the compound represented by the formula (2.2) is preferred because it particularly improves the response speed of the liquid crystal composition of the present invention. Further, when Tni is required to be higher than the response speed, it is preferred to use a compound represented by the formula (2.3) or the formula (2.4). The content of the compound represented by the formula (2.4) and the formula (2.5) is preferably not more than 30% in order to improve the solubility at a low temperature.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.2) is preferably 5% by mass or more, more preferably 10% by mass, based on the total amount of the liquid crystal composition of the present invention. It is preferably 14% by mass or more, particularly preferably 17% by mass or more, more preferably 19% by mass or more, still more preferably 22% by mass or more, still more preferably 25% by mass or more, and even more preferably 27% by mass. The above is more preferably 30% by mass or more, still more preferably 33% by mass or more, and particularly preferably 36% by mass or more. Further, the ratio which can be contained at the maximum is preferably 55% by mass or less, more preferably 50% by mass or less, still more preferably 45% by mass or less, and particularly preferably 40% by mass or less.

The liquid crystal composition of the present invention may further contain a compound represented by the formula (2.5) having a structure similar to the compound represented by the formula (I-1-2).

It is preferred to adjust the content of the compound represented by the formula (2.5) in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, birefringence, etc., with respect to the total amount of the liquid crystal composition of the present invention. In particular, it is preferably contained in an amount of 11% by mass or more, more preferably 15% by mass or more, particularly preferably 23% by mass or more, more preferably 26% by mass or more, and particularly preferably 28% by mass or more. .

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-2).

(wherein R ¹³ and R ¹⁴ each independently represent an alkyl group having 1 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-2) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. A preferred lower content limit is, for example, relative to the total amount of the liquid crystal composition of the present invention. In one embodiment of the invention, it is 3%. Alternatively, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 25%. Further, in another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 35%. Further, in still another embodiment of the present invention, it is 38%. Furthermore, in still another embodiment of the present invention, it is 40%. Further, in another embodiment of the present invention, it is 42%. Furthermore, in another embodiment of the present invention, it is 45%. Further, in still another embodiment of the present invention, it is 47%. Furthermore, in still another embodiment of the present invention, it is 50%.

Further, the upper limit of the preferable content is, for example, 60% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 45%. Further, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 5%. Further, the compound represented by the formula (I-2) is preferably a compound selected from the group of compounds represented by the formula (3.1) to the formula (3.4), more preferably a formula (3.1), a formula (3.3) or A compound represented by the formula (3.4). In particular, the compound represented by the formula (3.2) is preferred because it particularly improves the response speed of the liquid crystal composition of the present invention. Further, when Tni is required to be higher than the response speed, it is preferred to use a compound represented by the formula (3.3) or the formula (3.4). The content of the compound represented by the formula (3.3) and the formula (3.4) is preferably not more than 20% in order to improve the solubility at a low temperature.

Further, the compound represented by the formula (I-2) is preferably a compound selected from the group consisting of compounds represented by the formulae (3.1) to (3.4), more preferably a formula (3.1), a formula (3.3) and / or a compound of the formula (3.4).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (3.3) is preferably 2% by mass or more, more preferably 3% by mass, based on the total amount of the liquid crystal composition of the present invention. It is preferably 4% by mass or more, more preferably 10% by mass or more, still more preferably 12% by mass or more, still more preferably 14% by mass or more, still more preferably 16% by mass or more, and still more preferably 20% by mass or more. The above is more preferably 23% by mass or more, still more preferably 26% by mass or more, and particularly preferably 30% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 37% by mass or less, still more preferably 34% by mass or less, and particularly preferably 32% by mass or less.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-3).

(wherein R ¹³ represents an alkyl group having 1 to 5 carbon atoms, and R ¹⁵ represents an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but it is based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The required performance is combined. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-3) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 25%. Further, in another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 35%. Further, in still another embodiment of the present invention, it is 38%. Furthermore, in still another embodiment of the present invention, it is 40%. Further, in another embodiment of the present invention, it is 42%. Furthermore, in another embodiment of the present invention, it is 45%. Further, in still another embodiment of the present invention, it is 47%. Furthermore, in still another embodiment of the present invention, it is 50%.

Further, the upper limit of the preferable content is, for example, 60% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 45%. Further, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in another embodiment of the present invention, it is 20%. Again In still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 5%.

When the solubility in low temperature is emphasized, the effect is high if the content is set slightly, and conversely, when the response speed is emphasized, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

Further, the compound represented by the formula (I-3) is preferably a compound selected from the group consisting of compounds represented by the formulae (4.1) to (4.3), more preferably a compound represented by the formula (4.3).

The compound represented by the formula (4.3) is preferably 2% by mass or more, more preferably 4% by mass, even more preferably 6% by mass or more, and particularly preferably 8 or more, based on the total amount of the liquid crystal composition of the present invention. The mass% or more is preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 14% by mass or more, still more preferably 16% by mass or more, and still more preferably 18% by mass or more. It is more preferably 20% by mass or more, and particularly preferably 22% by mass or more. Further, the ratio which can be contained at the maximum is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 24% by mass or less, and particularly preferably 23% by mass or less.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-4).

(wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is combined in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-4) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 6%. Furthermore, in still another embodiment of the present invention, it is 8%. Further, in another embodiment of the present invention, it is 10%. Furthermore, in another embodiment of the present invention, it is 12%. Further, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40%. Furthermore, in this In still another embodiment of the invention, it is 35%. Further, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%.

When a high birefringence is obtained, the effect is high if the content is set slightly, and conversely, when the Tni is high, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

Further, the compound represented by the formula (I-4) is preferably a compound selected from the group consisting of compounds represented by the formulae (5.1) to (5.4), more preferably a formula (5.2) to a formula (5.4). The compound shown.

The compound represented by the formula (5.4) is preferably 2% by mass or more, more preferably 4% by mass, even more preferably 6% by mass or more, particularly preferably 8 or more, based on the total amount of the liquid crystal composition of the present invention. The mass% or more is preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 14% by mass or more, still more preferably 16% by mass or more, and still more preferably 18% by mass or more. It is more preferably 20% by mass or more, and particularly preferably 22% by mass or more. Further, the ratio which can be contained at the maximum is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 24% by mass or less, and particularly preferably 23% by mass or less.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-5).

(wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (I-5) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 1% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 8%, and in still another embodiment of the present invention, it is 11%. Further, in another embodiment of the present invention, it is 13%. Furthermore, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 40%, and in still another embodiment of the present invention, it is 35%. Further, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%.

When the solubility in low temperature is emphasized, the effect is high if the content is set slightly, and conversely, when the response speed is emphasized, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

Further, the compound represented by the formula (I-5) is preferably a compound selected from the group consisting of compounds represented by the formulae (6.1) to (6.7), more preferably a formula (6.3), a formula (6.4) and A compound of the formula (6.6).

For example, relative to the total amount of the liquid crystal composition of the present invention, The compound represented by (6.6) is preferably 2% by mass or more, more preferably 4% by mass, still more preferably 5% by mass or more, particularly preferably 6% by mass or more, and more preferably 9% by mass or more. It is preferably 12% by mass or more, more preferably 14% by mass or more, still more preferably 16% by mass or more, still more preferably 18% by mass or more, still more preferably 20% by mass or more, and particularly preferably 22% by mass or more. . Further, the ratio which can be contained at the maximum is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 24% by mass or less, and particularly preferably 23% by mass or less.

It is preferred to adjust the content of the compound represented by (6.7) in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, birefringence, etc., with respect to the total amount of the liquid crystal composition of the present invention. The compound is preferably contained in an amount of 2% by mass or more, more preferably 3% by mass, even more preferably 5% by mass, particularly preferably 7% by mass or more.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-6).

(wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of X ¹¹ and X ¹² The fluorine atom or the hydrogen atom is independently represented, and any of X ¹¹ or X ¹² is a fluorine atom).

The compound represented by the formula (I-6) is preferably 2% by mass or more, more preferably 4% by mass, even more preferably 5% by mass or more, based on the total amount of the liquid crystal composition of the present invention. It is preferably 6% by mass or more, more preferably 9% by mass or more, still more preferably 12% by mass or more, and still more preferably 14% by mass or more. More preferably, it is 16 mass% or more, more preferably 18 mass% or more, still more preferably 20 mass% or more, and particularly preferably 22 mass% or more. Further, the ratio which can be contained at the maximum is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 24% by mass or less, and particularly preferably 23% by mass or less.

Further, the compound represented by the formula (I-6) is preferably a compound represented by the formula (7.1).

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-7).

(wherein R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and X ¹² each independently represents Fluorine or chlorine atom).

The compound represented by the formula (I-7) is preferably 1% by mass or more, more preferably 2% by mass, particularly preferably 3% by mass or more, based on the total amount of the liquid crystal composition of the present invention. It is preferably 4% by mass or more, more preferably 6% by mass or more, still more preferably 8% by mass or more, still more preferably 10% by mass or more, still more preferably 12% by mass or more, and still more preferably 15% by mass. The above is more preferably 18% by mass or more, and particularly preferably 21% by mass or more. Further, the ratio which can be contained at the maximum is preferably 30% by mass or less, more preferably 25% by mass or less, particularly preferably 24% by mass or less, and particularly preferably 22% by mass or less.

Further, the compound represented by the formula (I-7) is preferably a compound represented by the formula (8.1).

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (I-8).

(wherein R ¹⁶ and R ¹⁷ each independently represent an alkenyl group having 2 to 5 carbon atoms).

The type of the compound which can be combined is not particularly limited, but it is preferably one to three types in combination with properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

The content of the compound represented by the formula (I-8) is required in terms of solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dropping trace, cauterization, dielectric anisotropy, and the like. The performance is preferably 5% by mass or more, more preferably 10% by mass, even more preferably 15% by mass or more, and particularly preferably 20% by mass or more, based on the total amount of the liquid crystal composition of the present invention. It is preferably 25% by mass or more, more preferably 30% by mass or more, still more preferably 35% by mass or more, still more preferably 40% by mass or more, still more preferably 45% by mass or more, and still more preferably 50% by mass. More than %, particularly preferably 55 mass% or more. Further, the ratio which can be contained at the maximum is preferably 65% by mass or less, more preferably 60% by mass or less, still more preferably 58% by mass or less, and particularly preferably 56% by mass or less.

Further, the compound represented by the formula (I-8) is preferably a compound selected from the group consisting of compounds represented by the formula (9.1) to the formula (9.10), more preferably a formula (9.2) or a formula (9.4). a compound of the formula (9.7).

Further, the compound represented by the formula (L) is preferably, for example, a compound selected from the compounds represented by the formula (II).

(R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and A ² represents a 1,4-extension ring; Hexyl or 1,4-phenylene, Q ² represents a single bond, -COO-, -CH ₂ -CH ₂ - or -CF ₂ O-).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Or, another in the present invention In the embodiment, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in another embodiment of the present invention, it is four or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (II) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 14%. Furthermore, in another embodiment of the present invention, it is 16%. Further, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 23%. Further, in another embodiment of the present invention, it is 26%. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Further, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%.

Further, the compound represented by the formula (II) is preferably, for example, a compound selected from the group of compounds represented by the formula (II-1).

(R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (II-1) is preferably adjusted in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and is preferably 4% by mass or more. More preferably, it is 8% by mass or more, and particularly preferably 12% by mass or more. Further, the ratio which can be contained at the maximum is preferably 24% by mass or less, more preferably 18% by mass or less, and still more preferably 14% by mass or less.

Further, the compound represented by the formula (II-1) is preferably a compound represented by the formula (10.1), for example.

Further, the compound represented by the formula (II) is preferably, for example, a compound selected from the group of compounds represented by the formula (II-2).

(R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is two or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (II-2) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 14%. Furthermore, in another embodiment of the present invention, it is 16%. Further, in still another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 23%. Further, in another embodiment of the present invention, it is 26%. Furthermore, in another embodiment of the present invention, it is 30%, and in still another embodiment of the present invention, it is 35%. Further, in another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in still another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Further, in another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Further, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 5%.

Further, the compound represented by the formula (II-2) is preferably, for example, a compound represented by the formula (11.1) to the formula (11.3).

The compound represented by the formula (11.1) may be contained, or the compound represented by the formula (11.2) may be contained, or the formula (11.1) may be contained according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, birefringence, and the like. Both the compound shown and the compound represented by the formula (11.2) or all of the compounds represented by the formula (11.1) to the formula (11.3). The content of the compound represented by the formula (11.1) or the formula (11.2) is preferably 3% by mass, more preferably 5% by mass or more, and particularly preferably 7 mass, based on the total amount of the liquid crystal composition of the present invention. % or more, particularly preferably 9% by mass or more, more preferably 11% by mass or more, still more preferably 12% by mass or more, still more preferably 13% by mass or more, and still more preferably 18% by mass or more, particularly preferably It is 21% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less. Further, the content of the compound represented by the formula (11.2) is preferably 3% by mass, more preferably 5% by mass or more, and particularly preferably 8% by mass or more based on the total amount of the liquid crystal composition of the present invention. It is particularly preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 15% by mass or more, still more preferably 17% by mass or more, and particularly preferably 19% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less. When both the compound represented by the formula (11.1) and the compound represented by the formula (11.2) are contained, the total of the two compounds is preferably 15% by mass based on the total amount of the liquid crystal composition of the present invention. More preferably, it is 19% by mass or more, and particularly preferably 24% by mass. The upper part is preferably 30% by mass or more. Further, the ratio which can be contained at the maximum is preferably 45% by mass or less, more preferably 40% by mass or less, and still more preferably 35% by mass or less.

Further, the compound represented by the formula (II) is preferably, for example, a compound selected from the group of compounds represented by the formula (II-3).

(R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not particularly limited, but it is preferably one to three kinds of these compounds in accordance with the properties required for low temperature solubility, transfer temperature, electrical reliability, and birefringence. .

The content of the compound represented by the formula (II-3) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dropping trace, cauterization, dielectric anisotropy, and the like. The required performance is suitable for adjustment. The lower limit of the preferred content is, for example, preferably 2%, more preferably 5%, still more preferably 8%, still more preferably 11%, based on the total amount of the liquid crystal composition of the present invention. It is preferably 14%, more preferably 17%, still more preferably 20%, still more preferably 23%, still more preferably 26%, and particularly preferably 29%. Further, the upper limit of the preferable content is, for example, preferably 45%, more preferably 40%, particularly preferably 35%, particularly preferably 30%, based on the total amount of the liquid crystal composition of the present invention. It is preferably 25%, more preferably 20%, still more preferably 15%, and particularly preferably 10%.

Further, the compound represented by the formula (II-3) is preferably, for example, a compound represented by the formula (12.1) to the formula (12.3).

The compound represented by the formula (12.1) may be contained, or the compound represented by the formula (12.2) may be contained, or the formula (12.1) may be contained according to the properties required for solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. Both the compound shown and the compound represented by the formula (12.2). The content of the compound represented by the formula (12.1) or the formula (11.2) is preferably 3% by mass, more preferably 5% by mass or more, and particularly preferably 7 mass, based on the total amount of the liquid crystal composition of the present invention. % or more, particularly preferably 9% by mass or more, more preferably 11% by mass or more, still more preferably 12% by mass or more, still more preferably 13% by mass or more, and still more preferably 18% by mass or more, particularly preferably It is 21% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less. Further, the content of the compound represented by the formula (12.2) is preferably 3% by mass, more preferably 5% by mass or more, and particularly preferably 8% by mass or more based on the total amount of the liquid crystal composition of the present invention. It is particularly preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 15% by mass or more, still more preferably 17% by mass or more, and still more preferably 19% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less. When both the compound represented by the formula (12.1) and the compound represented by the formula (12.2) are contained, the total of the two compounds is preferably 15% by mass based on the total amount of the liquid crystal composition of the present invention. The above is more preferably 19% by mass or more, particularly preferably 24% by mass or more, and particularly preferably 30% by mass or more. In addition, the maximum can contain The ratio is preferably 45% by mass or less, preferably 40% by mass or less, and more preferably 35% by mass or less.

In addition, the content of the compound represented by the formula (12.3) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and particularly preferably 0.2% by mass or more based on the total amount of the liquid crystal composition of the present invention. . Further, the ratio which can be contained at the maximum is preferably 2% by mass or less, more preferably 1% by mass or less, and still more preferably 0.5% by mass or less. The compound represented by the formula (12.3) may also be an optically active compound.

Further, the compound represented by the formula (II-3) is preferably, for example, a compound selected from the group of compounds represented by the formula (II-3-1).

(R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁶ represents an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not particularly limited, but it is preferably one to three kinds of these compounds in accordance with the properties required for low temperature solubility, transfer temperature, electrical reliability, and birefringence. .

The content of the compound represented by the formula (II-3-1) is preferably adjusted in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and is preferably 1% by mass. The above is more preferably 4% by mass or more, and particularly preferably 8% by mass or more. Further, the ratio which can be contained at the maximum is preferably 24% by mass or less, more preferably 18% by mass or less, and still more preferably 14% by mass or less.

Further, the compound represented by the formula (II-3-1) is preferably a compound represented by the formula (13.1) to the formula (13.4), and particularly preferably a compound represented by the formula (13.3).

Further, the compound represented by the formula (II) is preferably, for example, a compound selected from the group of compounds represented by the formula (II-4).

(R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

Only one type of these compounds may be contained, or two or more types may be contained, but it is preferable to mix them suitably according to the required performance. The type of the compound which can be combined is not particularly limited, but it is preferably one or two kinds of these compounds in accordance with the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. It is especially good for one to three types.

The content of the compound represented by the formula (II-4) is preferably 1% by mass or more, more preferably 2% by mass or more, and particularly preferably 3% by mass based on the total amount of the liquid crystal composition of the present invention. The above is particularly preferably 4% by mass or more, and particularly preferably 5% by mass or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 12% by mass or less, and still more preferably 7% by mass or less.

Further, the compound represented by the formula (II-4) is, for example, preferably a compound represented by the formula (14.1) to the formula (14.5), particularly preferably a compound represented by the formula (14.2) or/and the formula (14.5). .

Further, the compound represented by the formula (L) is preferably a compound selected from the group of compounds represented by the formula (III).

(R ³¹ and R ³² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (III) is preferably 2% by mass or more, more preferably 2% by mass or more, based on the total amount of the liquid crystal composition of the present invention, in consideration of the required solubility or birefringence. It is contained in an amount of 3% by mass or more, and more preferably in an amount of 4% by mass or more. Further, the ratio which can be contained at the maximum is preferably 25% by mass or less, more preferably 20% by mass or less, and still more preferably 15% by mass or less.

Further, the compound represented by the formula (III) is preferably a compound represented by the formula (15.1) or the formula (15.2), and particularly preferably a compound represented by the formula (15.1).

Further, the compound represented by the formula (III) is preferably a compound selected from the group of compounds represented by the formula (III-1).

(R ³³ represents an alkenyl group having 2 to 5 carbon atoms, and R ³² each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

It is preferred to adjust the content in accordance with the performance required at low temperature solubility, transfer temperature, electrical reliability, birefringence, etc., preferably 4% by mass or more, more preferably 6% by mass or more, and particularly preferably 10% by mass. %the above. Further, the ratio which can be contained at the maximum is preferably 23% by mass or less, more preferably 18% by mass or less, and still more preferably 13% by mass or less.

The compound represented by the formula (III-1) is preferably a compound represented by the formula (16.1) or the formula (16.2), for example.

Further, the compound represented by the formula (III) is preferably a compound selected from the group of compounds represented by the formula (III-2).

(R ³¹ represents an alkyl group having 1 to 5 carbon atoms, and R ³⁴ represents an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (III-2) is preferably adjusted according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and is preferably 2% by mass or more. More preferably 3 mass% or more More preferably, it is 4% by mass or more. Further, the ratio which can be contained at the maximum is preferably 23% by mass or less, more preferably 18% by mass or less, and still more preferably 13% by mass or less.

In addition, the compound represented by the formula (III-2) is preferably a compound selected from the group consisting of the compounds represented by the formula (17.1) to the formula (17.3), and particularly preferably a compound represented by the formula (17.3).

Further, the compound represented by the formula (L) is preferably a compound selected from the group represented by the formula (V).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of A ⁵¹ and A ⁵² Independently, it represents 1,4-cyclohexylene or 1,4-phenylene, Q ⁵ represents a single bond or -COO-, and X ⁵¹ and X ⁵² each independently represent a fluorine atom or a hydrogen atom).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, there are three types. Further, in another embodiment of the present invention, there are four types.

The lower limit of the content of the preferred content is, for example, 2% in one embodiment with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 12%. Furthermore, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 18%. Further, in another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 22%.

Further, the upper limit of the preferable content is, for example, 40% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in another embodiment of the present invention, it is 10%. Further, in still another embodiment of the present invention, it is 5%. Furthermore, in still another embodiment of the present invention, it is 4%.

Further, the compound represented by the formula (V) is preferably a compound represented by the formula (V-1).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of X ⁵¹ and X ⁵² Independently represents a fluorine atom or a hydrogen atom).

Further, the compound represented by the formula (V-1) is preferably of the formula (V-1-1). The compound shown.

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (V-1-1), more preferably 2% by mass or more, and particularly preferably contained. It is more preferably 3 mass% or more, and particularly preferably 4 mass% or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

Further, the compound represented by the formula (V-1-1) is preferably a compound represented by the formula (20.1) to the formula (20.4), more preferably a compound represented by the formula (20.2).

Further, the compound represented by the formula (V-1) is preferably a compound represented by the formula (V-1-2).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (V-1-2), more preferably 2% by mass or more, and particularly preferably contained. 3% by mass or more, especially good for 4 quality More than %. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

Further, the compound represented by the formula (V-1-2) is preferably a compound represented by the formula (21.1) to the formula (21.3), more preferably a compound represented by the formula (21.1).

Further, the compound represented by the formula (V-1) is preferably a compound represented by the formula (V-1-3).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (V-1-3), more preferably 2% by mass or more, and particularly preferably contained. It is more preferably 3 mass% or more, and particularly preferably 4 mass% or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

Further, the compound represented by the formula (V-1-3) is a compound represented by the formula (22.1) to the formula (22.3). A compound represented by the formula (22.1) is preferred.

Further, the compound represented by the formula (V) is preferably a compound represented by the formula (V-2).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of X ⁵¹ and X ⁵² Independently represents a fluorine atom or a hydrogen atom).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is two or more types.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 2% in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 12%. Furthermore, in another embodiment of the present invention, it is 15%. Further, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 18%. Further, in another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 22%.

Further, the upper limit of the preferable content is, for example, 40% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%. Further, in another embodiment of the present invention, it is 4%.

When it is desired that the liquid crystal composition of the present invention has a high Tni embodiment, the content of the compound represented by the formula (V-2) is preferably slightly increased. When a low viscosity embodiment is desired, it is preferred to The content is slightly less.

Further, the compound represented by the formula (V-2) is preferably a compound represented by the formula (V-2-1).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

Further, the compound represented by the formula (V-2-1) is preferably a compound represented by the formula (23.1) to the formula (23.4), more preferably a formula (23.1) or/and a formula (23.2). Compound.

Further, the compound represented by the formula (V-2) is preferably a compound represented by the formula (V-2-2).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

Further, the compound represented by the formula (V-2-2) is preferably a compound represented by the formula (24.1) to the formula (24.4), more preferably a formula (24.1) or/and a formula (24.2). Compound.

Further, the compound represented by the formula (V) is preferably a compound represented by the formula (V-3).

(wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is combined according to the properties required for low-temperature solubility, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, it is three or more types.

The total amount of the liquid crystal composition of the present invention is preferably 2% by mass or more of the compound represented by the formula (V-3), more preferably 4% by mass or more, and particularly preferably 7% by mass. More than or equal to 100% by mass. Further, the ratio which can be contained at the maximum is preferably 16% by mass or less, more preferably 13% by mass or less, and still more preferably 11% by mass or less.

Further, the compound represented by the formula (V-3) is preferably a compound represented by the formula (25.1) to the formula (25.3).

The liquid crystal composition of the present invention may further contain one or more types of compounds represented by the formula (VI).

(wherein R ⁶¹ and R ⁶² each independently represent a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms or a linear alkenyl group having 2 to 10 carbon atoms) .

The type of the compound which can be combined is not particularly limited, but it is preferably one to three kinds of these compounds in accordance with the properties required for low temperature solubility, transfer temperature, electrical reliability, and birefringence. It is more preferable to contain one type to four types, and particularly preferably one type to five types or more. Further, the ratio which can be contained at the maximum is preferably 35% by mass or less, more preferably 25% by mass or less, and still more preferably 15% by mass or less.

The compound represented by the formula (VI) can be suitably used, as specifically, the compounds listed below.

The liquid crystal composition of the present invention may further contain one or two or more kinds of compounds represented by the formula (VII).

(wherein R ⁷¹ and R ⁷² each independently represent a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms or a linear alkenyl group having 4 to 10 carbon atoms) .

The type of the compound which can be combined is not particularly limited, but it is preferably one to three kinds of these compounds in accordance with the properties required for low temperature solubility, transfer temperature, electrical reliability, and birefringence. It is more preferable to contain one type to four types, and particularly preferably one type to five types or more. Further, the ratio which can be contained at the maximum is preferably 35% by mass or less, more preferably 25% by mass or less, and still more preferably 15% by mass or less.

The compound represented by the formula (VII) can be suitably used as follows. Listed compounds.

The liquid crystal composition of the present invention preferably further contains a compound represented by the formula (M).

(wherein R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent -CH ₂ - groups may independently be -CH=CH-, -C≡ C-, -O-, -CO-, -COO- or -OCO-substituted, PM represents 0, 1, 2, 3 or 4, and C ^M1 and C ^M2 each independently represent a selected from (d) 1,4- Cyclohexyl group (one -CH ₂ - or two or more -CH ₂ - groups not present in this group may be substituted into -O- or -S-) and (e) 1,4-phenylene a group in the group consisting of one -CH= or two or more non-contiguous -CH= may be substituted into -N=), the above-mentioned group (d), base ( e) each independently substituted by a cyano group, a fluorine atom or a chlorine atom, and K ^M1 and K ^M2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, - CH ₂ O-, -OCF ₂ -, -CF ₂ O-, -COO-, -OCO- or -C≡C-, when PM is 2, 3 or 4, K ^{M1 is} plural, they may be the same or Differently, when PM is 2, 3 or 4, and C ^{M2 is} present in plural, they may be the same or different, X ^M1 and K ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom, and X ^M2 represents a hydrogen atom, Fluorine, chlorine, cyano, trifluoromethyl, fluoromethoxy , Difluoromethoxy, trifluoromethoxy or 2,2,2-trifluoroethyl group; but excluding the compound represented by general formula (i) and the compound of general formula (ii) is).

The kind of the compound which can be combined is not particularly limited, but is used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, there are three types. Further, in still another embodiment of the present invention, there are four types. Further, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Further, in still another embodiment of the present invention, it is seven or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (M) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, dielectric The required performance such as constant anisotropy is appropriately adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 1% in one embodiment of the present invention. Further, for example, in another embodiment of the present invention, it is 10%. For example, in still another embodiment of the present invention, it is 20%. For example, in still another embodiment of the present invention, it is 30%. For example, in another embodiment of the present invention, it is 40%. For example, in another embodiment of the present invention, it is 45%. For example, in still another embodiment of the present invention, it is 50%. For example, in still another embodiment of the present invention, it is 55%. For example, in another embodiment of the present invention, it is 60%. For example, in another embodiment of the present invention, it is 65%. For example, in still another embodiment of the present invention, it is 70%. For example, in still another embodiment of the present invention, it is 75%. For example, in another embodiment of the present invention, it is 80%.

Further, the upper limit of the preferable content is, for example, 95% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 85%. Further, in still another embodiment of the present invention, it is 75%. Furthermore, in still another embodiment of the present invention, it is 65%. Further, in another embodiment of the present invention, it is 55%. In another embodiment of the invention, it is 45%. In still another embodiment of the present invention, it is 35%. In still another embodiment of the present invention, it is 25%.

To keep the viscosity of the liquid crystal composition of the present invention low, it is necessary to respond In the case of a liquid crystal composition having a high speed, it is preferable to make the above lower limit value slightly lower and the upper limit value to be slightly lower. In addition, when the liquid crystal composition of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, it is preferable that the lower limit value is slightly lower and the upper limit value is made slightly lower. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, it is preferable to make the above lower limit slightly higher and the upper limit to be slightly higher.

R ^M1 is preferably a linear alkyl group having 1 to 5 carbon atoms and a linear alkoxy group having 1 to 4 carbon atoms when the ring to which the ring is bonded is a phenyl group (aromatic). And an alkenyl group having 4 to 5 carbon atoms, wherein the ring to which the bond is bonded is cyclohexane, pyran and In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear carbon number of 2 to 5 are preferable. Alkenyl.

When the chemical stability of the liquid crystal composition is required for the compound represented by the formula (M), it is preferred that the compound does not contain a chlorine atom in its molecule. Further, the compound having a chlorine atom in the liquid crystal composition is preferably 5% or less, more preferably 3% or less, still more preferably 1% or less, still more preferably 0.5% or less, and particularly preferably substantially not contained. The term "substantially not contained" means a compound which is not formed as an impurity in the production of a compound, and means that a compound containing only a chlorine atom is mixed into the liquid crystal composition.

The compound represented by the formula (M) is preferably, for example, a compound selected from the group of compounds represented by the formula (VIII).

(wherein R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and X ⁸¹ to X ⁸⁵ each independently represent a hydrogen atom or A fluorine atom, Y ⁸ represents a fluorine atom or -OCF ₃ ).

The kind of the compound which can be combined is not particularly limited, but is used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, it is three or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (VIII) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, dielectric The required performance such as constant anisotropy is appropriately adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 2% in one embodiment of the present invention. Further, for example, in another embodiment of the present invention, it is 4%. For example, in still another embodiment of the present invention, it is 5%. For example, in still another embodiment of the present invention, it is 6%. For example, in another embodiment of the present invention, it is 7%. For example, in another embodiment of the present invention, it is 8%. For example, in still another embodiment of the present invention, it is 9%. For example, in still another embodiment of the present invention, it is 10%. For example, in another embodiment of the present invention, it is 11%. For example, in another embodiment of the present invention, it is 12%. For example, in still another embodiment of the present invention, it is 14%. For example, in still another embodiment of the present invention, it is 15%. For example, in another embodiment of the present invention, it is 21%. For example, in another embodiment of the present invention, it is 23%.

Further, the upper limit of the preferable content is, for example, 40% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 30%. Further, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 21%. Further, in another embodiment of the present invention, it is 16%. In another embodiment of the invention, it is 12%. In still another embodiment of the present invention, it is 8%. In still another embodiment of the present invention, it is 5%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the lower limit value is slightly lower and the upper limit is made slightly lower. In addition, when the liquid crystal composition of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, it is preferable that the lower limit value is slightly lower and the upper limit value is made slightly lower. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, it is preferable to make the above lower limit slightly higher and the upper limit to be slightly higher.

Further, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-1).

(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but it is based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. The desired performance is used in combination. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is two or more types.

Further, the compound represented by the formula (VIII-1) is specifically preferably a compound represented by the formula (26.1) to the formula (26.4), more preferably a compound represented by the formula (26.1) or the formula (26.2). More preferably, it is a compound represented by the formula (26.2).

The content of the compound represented by the formula (26.2) is preferably 2% by mass based on the total amount of the liquid crystal composition of the present invention in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The above is more preferably 4% by mass or more, particularly preferably 5% by mass or more, particularly preferably 6% by mass or more, more preferably 7% by mass or more, and particularly preferably 8% by mass or more. In addition, the maximum ratio is preferably 40% by mass or less, more preferably 35% by mass or less, even more preferably 30% by mass or less, and particularly preferably 25% by mass or less, in view of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-2).

(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but is used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, it is three or more types.

The content of the compound represented by the formula (VIII-2) is preferably 2.5% by mass or more, more preferably 8% by mass or more, in view of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. Preferably, it is 10% by mass, and particularly preferably 12% by mass or more. Further, the ratio which can be contained at the maximum is preferably 25% by mass or less, more preferably 20% by mass or less, and still more preferably 15% by mass or less.

Further, the compound represented by the formula (VIII-2) is preferably a compound represented by the formula (27.1) to the formula (27.4), more preferably a compound represented by the formula (27.2).

Further, the compound represented by the formula (M) is preferably, for example, a compound selected from the group of compounds represented by the formula (IX).

(wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and X ⁹¹ and X ⁹² each independently represent a hydrogen atom or A fluorine atom, Y ⁹ represents a fluorine atom, a chlorine atom or -OCF ₃ , and U ⁹ represents a single bond, -COO- or -CF ₂ O-; except for the compound represented by the formula (ii).

The kind of the compound which can be combined is not particularly limited, but is used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, there are three types. Further, in still another embodiment of the present invention, there are four types. Furthermore, in another embodiment of the present invention, there are five types. Further, in another embodiment of the present invention, it is six or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (IX) must be in accordance with solubility at low temperature, transfer temperature, and electrical reliability. The properties required for birefringence, process suitability, dripping marks, cauterization, dielectric anisotropy, etc. are suitably adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Further, for example, in another embodiment of the present invention, it is 5%. For example, in still another embodiment of the present invention, it is 8%. For example, in still another embodiment of the present invention, it is 10%. For example, in another embodiment of the present invention, it is 12%. For example, in another embodiment of the present invention, it is 15%. For example, in still another embodiment of the present invention, it is 17%. For example, in still another embodiment of the present invention, it is 20%. For example, in another embodiment of the present invention, it is 24%. For example, in another embodiment of the present invention, it is 28%. For example, in still another embodiment of the present invention, it is 30%. For example, in still another embodiment of the present invention, it is 34%. For example, in another embodiment of the present invention, it is 39%. For example, in another embodiment of the present invention, it is 40%. For example, in another embodiment of the present invention, it is 42%. For example, in still another embodiment of the present invention, it is 45%.

Further, the upper limit of the preferable content is, for example, 70% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 60%. In still another embodiment of the present invention, it is 55%. In still another embodiment of the present invention, it is 50%. In another embodiment of the invention, it is 45%. In another embodiment of the invention, it is 40%. In still another embodiment of the present invention, it is 35%. In still another embodiment of the present invention, it is 30%. In another embodiment of the invention, it is 25%. In another embodiment of the invention, it is 20%. In still another embodiment of the present invention, it is 15%. In the invention In one embodiment, it is 10%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the lower limit value is slightly lower and the upper limit is made slightly lower. When the Tni of the liquid crystal composition of the present invention is kept high and a liquid crystal composition which is less likely to cause cauterization is required, it is preferable to make the above lower limit value slightly lower and the upper limit value to be slightly lower. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, it is preferable to make the above lower limit slightly higher and the upper limit to be slightly higher.

Further, the compound represented by the formula (IX) is preferably a compound represented by the formula (IX-1).

(wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; X ⁹² represents a hydrogen atom or a fluorine atom, and Y ⁹ represents A fluorine atom or -OCF ₃ ; except for the compound represented by the formula (ii).

The kind of the compound which can be combined is not particularly limited, but is used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, there are three types. Further, in still another embodiment of the present invention, it is four or more types.

Further, the compound represented by the formula (IX-1) is preferably a compound represented by the formula (IX-1-2).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not limited, but it is preferably one to three types in combination with low-temperature solubility, transfer temperature, electrical reliability, birefringence, etc., and more preferably one to four types.

The content of the compound represented by the formula (IX-1-2) is preferably 1% by mass or more, more preferably 5% by mass or more, and particularly preferably 8% based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 10% by mass or more, more preferably 14% by mass or more, and particularly preferably 16% by mass or more. Further, the maximum ratio is preferably limited to 30% by mass or less, more preferably 25% by mass or less, even more preferably 22% by mass or less, and particularly preferably less than 20% by mass, in view of solubility in low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (IX-1-2) is preferably a compound represented by the formula (29.1) to the formula (29.4), more preferably a formula (29.2) or/and a formula (29.4). Compound.

Further, the compound represented by the formula (IX) is preferably a compound represented by the formula (IX-2).

(wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and X ⁹¹ and X ⁹² each independently represent a hydrogen atom or A fluorine atom, Y ⁹ represents a fluorine atom, a chlorine atom or -OCF ₃ ).

The type of the compound which can be combined is not particularly limited, and it is suitable to be used in combination in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, there are one type, and in another embodiment, two types, in another embodiment, three types, and in still another embodiment, four types, and in still another embodiment In the other embodiment, there are five types, and in another embodiment, six or more types are combined.

Further, the compound represented by the formula (IX-2) is preferably a compound represented by the formula (IX-2-1).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not limited, and it is preferable to combine one to three types in consideration of solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the formula (IX-2-1) is preferably a lower limit and a lower limit per embodiment in consideration of characteristics such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. value. The lower limit of the content is, for example, 1% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. In another embodiment, it is 2%, in another embodiment, it is 4%, in another embodiment, it is 10%, in still another embodiment, it is 14%, and in still another embodiment, it is 16%. %, in yet another embodiment, is 21%. Further, the upper limit of the content is, for example, 40% in one embodiment of the present invention, 35% in another embodiment, 30% in still another embodiment, and 25% in still another embodiment. In another embodiment, it is 22%, in another embodiment, it is 20%, in yet another embodiment, it is 10%, and in still another embodiment, it is 7%, and in another embodiment, In the form, it is 5%.

Further, the compound represented by the formula (IX-2-1) is preferably a compound represented by the formula (30.1) to the formula (30.4), more preferably a compound represented by the formula (30.1) to the formula (30.2).

Further, the compound represented by the formula (IX-2) is preferably a compound represented by the formula (IX-2-2).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not limited, and it is preferable to combine one to three types in consideration of solubility at low temperature, transfer temperature, electrical reliability, birefringence, etc., and more preferably from 1 to 4 types.

The content of the compound represented by the formula (IX-2-2) is considered to have properties such as low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 1% in the total amount of the liquid crystal composition of the present invention, and 2% in another embodiment, in another embodiment of the present invention, and in another embodiment 4% is 10% in still another embodiment, 14% in still another embodiment, 16% in yet another embodiment, and 21% in still another embodiment. Further, the upper limit of the content is, for example, 40% in one embodiment of the present invention, 35% in another embodiment, 30% in still another embodiment, and 25% in still another embodiment. In another embodiment, it is 22%, in another embodiment, it is 15%, in still another embodiment, it is 12%, and in another embodiment, it is 8%, and in another embodiment, it is further implemented. In the form, it is 4%.

Further, the compound represented by the formula (IX-2-2) is preferably a compound represented by the formula (31.1) to the formula (31.4), more preferably a compound represented by the formula (31.1) to the formula (31.4).

Further, the compound represented by the formula (IX-2) is preferably a compound represented by the formula (IX-2-3).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound that can be combined is not limited, but it is preferable to combine one to two types in consideration of solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the formula (IX-2-3) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 6 based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 8% by mass or more, and particularly preferably 15% by mass or more. Further, in consideration of solubility at low temperature, transfer temperature, electrical reliability, and the like, the maximum ratio is preferably limited to 30% by mass or less, more preferably less than 20% by mass, particularly preferably 15% by mass or less, and particularly preferably less than 10% by mass. %.

Further, the compound represented by the formula (IX-2-3) is preferably a compound represented by the formula (32.1) to the formula (32.4), more preferably a formula (32.2) and/or a formula (32.4). Compound.

Further, the compound represented by the formula (IX-2) is preferably a compound represented by the formula (IX-2-4).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (IX-2-4) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 6 based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 8% by mass or more. Further, the maximum ratio is preferably limited to 30% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less, and particularly preferably less than 10% by mass, in view of solubility at low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (IX-2-4) is preferably a compound represented by the formula (33.1) to the formula (33.5), more preferably a formula (33.1) and/or a formula (33.3). Compound.

Further, the compound represented by the formula (IX-2) is preferably a compound represented by the formula (IX-2-5).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not limited, and it is suitable to be used in combination in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, there are one type, and in another embodiment, two types, in another embodiment, three types, and in still another embodiment, four types or more.

The content of the compound represented by the formula (IX-2-5) is considered to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 4% in the total amount of the liquid crystal composition of the present invention, and 8% in another embodiment, and in another embodiment, 12% is 21% in still another embodiment, 30% in still another embodiment, 31% in yet another embodiment, and 34% in yet another embodiment. Further, the upper limit of the content is, for example, 45% in one embodiment of the present invention, 40% in another embodiment, 35% in still another embodiment, and 32% in still another embodiment. In another embodiment, it is 22%, in yet another embodiment, it is 13%, in yet another embodiment, it is 9%, and in still another embodiment, it is 8%, and another embodiment is implemented. In the form, it is 5%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable to make the above lower limit value slightly Low, making the upper limit slightly lower. When the Tni of the liquid crystal composition of the present invention is kept high and a liquid crystal composition which is less likely to cause cauterization is required, it is preferable to make the above lower limit value slightly lower and the upper limit value to be slightly lower. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, it is preferable to make the above lower limit slightly higher and the upper limit to be slightly higher.

Further, the compound represented by the formula (IX-2-5) is preferably a compound represented by the formula (34.1) to the formula (34.5), more preferably a formula (34.1), a formula (34.2) or a formula (34.3). And / or a compound represented by the formula (34.5).

Further, the compound represented by the formula (IX) is preferably a compound represented by the formula (IX-3).

(wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and X ⁹¹ and X ⁹² each independently represent a hydrogen atom or A fluorine atom, Y ⁹ represents a fluorine atom, a chlorine atom or -OCF ₃ ).

Further, the compound represented by the formula (IX-3) is preferably a compound represented by the formula (IX-3-1).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound that can be combined is not limited, but it is preferable to combine one to two types in consideration of solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the formula (IX-3-1) is preferably 3% by mass or more, more preferably 7% by mass or more, and particularly preferably 13% based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 15% by mass or more. Further, the maximum ratio is preferably limited to 30% by mass or less, more preferably 20% by mass or less, even more preferably 18% or less, and particularly preferably less than 10% by mass, in view of solubility at low temperature, transfer temperature, electrical reliability, and the like.

Further, the compound represented by the formula (IX-3-1) is preferably a compound represented by the formula (35.1) to the formula (35.4), more preferably a compound represented by the formula (35.1) and/or the formula (35.2). Compound.

Further, the compound represented by the formula (M) is preferably a compound represented by the formula (X).

(wherein, X ¹⁰¹ to X ¹⁰⁴ each independently represent a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom, -OCF ₃ , Q ¹⁰ represents a single bond or -CF ₂ O-, and R ¹⁰ represents a carbon atom An alkyl group of 1 to 5, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and A ¹⁰¹ and A ¹⁰² each independently represent a 1,4-cyclohexylene group and a 1,4-stretching group. Phenyl or However, the hydrogen atom on the 1,4-phenylene group may also be substituted by a fluorine atom).

The compound which can be set is not particularly limited, and is preferably combined in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, it is one type. Further, in another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, it is 5 or more types.

The content of the compound represented by the formula (X) is considered to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 2% in the total amount of the liquid crystal composition of the present invention, and 3% in another embodiment in one embodiment of the present invention, and is further 3% in another embodiment. 6% is 8% in another embodiment, 9% in still another embodiment, 11% in yet another embodiment, and 12% in yet another embodiment, and further in another embodiment. In the embodiment, it is 18%. Further, in another embodiment, it is 19%. In yet another embodiment, it is 23%. In yet another embodiment, it is 25%. Further, the upper limit of the content is, for example, 45% in one embodiment of the present invention, 35% in another embodiment, 30% in still another embodiment, and 25% in still another embodiment. In another embodiment, it is 20%, in yet another embodiment, it is 13%, in yet another embodiment, it is 9%, and in still another embodiment, it is 6%, and in another embodiment, In the form, it is 3%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the lower limit value is slightly lower and the upper limit is made slightly lower. In the case of a liquid crystal composition which is less likely to cause cauterization, it is preferable to make the above lower limit value slightly lower and the upper limit value It is slightly lower. Further, in order to keep the driving voltage low and to increase the dielectric anisotropy, it is preferable to make the above lower limit slightly higher and the upper limit to be slightly higher.

The compound represented by the formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-1).

(wherein, X ¹⁰¹ to X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkane having 1 to 4 carbon atoms; Oxy).

The compound which can be combined is not particularly limited, and is preferably combined in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, it is one type. Further, in another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, it is 5 or more types.

The content of the compound represented by the formula (X-1) is considered to have properties such as low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 2% in the total amount of the liquid crystal composition of the present invention, and 3% in another embodiment in one embodiment of the present invention, and is further 3% in another embodiment. 5% is 6% in another embodiment, 7% in still another embodiment, 8% in yet another embodiment, and 9% in still another embodiment. Further, in another embodiment, it is 13%. In yet another embodiment It is 18%. In yet another embodiment, it is 23%.

Further, the upper limit of the content is, for example, 40% in one embodiment of the present invention, 30% in another embodiment, 25% in still another embodiment, and 20% in still another embodiment. In another embodiment, it is 15%, in another embodiment, it is 10%, in still another embodiment, it is 6%, and in another embodiment, it is 4%, and in another embodiment, it is further implemented. In the form, it is 2%.

In the liquid crystal composition of the present invention, the compound represented by the formula (X-1) is preferably a compound represented by the formula (X-1-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, and is preferably used in combination in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, it is one type. Further, in another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, it is four or more types.

The content of the compound represented by the formula (X-1-1) is considered to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 3% in the total amount of the liquid crystal composition of the present invention, and 4% in the other embodiment, in still another embodiment. The middle is 6%, and in another embodiment, it is 9%, in still another embodiment, it is 12%, in yet another embodiment, it is 15%, and in still another embodiment, it is 18%. In still another embodiment, it is 21%.

Further, the upper limit of the content is, for example, 30% in one embodiment of the present invention, 20% in another embodiment, 13% in still another embodiment, and 10% in still another embodiment. In still another embodiment, it is 7%, and in still another embodiment, it is 3%.

Further, the compound represented by the formula (X-1-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (36.1) to the formula (36.4), and preferably contains A compound represented by the formula (36.1) and/or the formula (36.2).

Further, the compound represented by the formula (X-1) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-1-2).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (X-1-2) is preferably 1% by mass or more, more preferably 2% by mass or more, and particularly preferably 6 based on the total amount of the liquid crystal composition of the present invention. More than % by mass. In addition, the maximum ratio is preferably 20% by mass or less, more preferably 16% by mass or less, even more preferably 12% by mass or less, and particularly preferably 10% by mass or less, in terms of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-1-2) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (37.1) to the formula (37.4), and preferably contains A compound represented by the formula (37.2).

Further, the formula (X-1) used in the liquid crystal composition of the present invention is shown. The compound is preferably a compound represented by the formula (X-1-3).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

The content of the compound represented by the formula (X-1-3) is preferably 1% by mass or more, more preferably 2% by mass or more, and particularly preferably 6% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. In addition, the maximum ratio is preferably 20% by mass or less, more preferably 16% by mass or less, even more preferably 12% by mass or less, and particularly preferably 10% by mass or less, in terms of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-1-3) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (38.1) to the formula (38.4), preferably containing A compound represented by the formula (38.2).

The compound represented by the formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-2).

(wherein, X ¹⁰² to X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom, -OCF ₃ , and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, and 2 to 2 carbon atoms; 5 alkenyl or alkoxy having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

In addition, the compound represented by the formula (X-2) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-2-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but is preferably considered One type to two types or more is used in combination with low-temperature solubility, transfer temperature, electrical reliability, birefringence, and the like, and more preferably one to three or more types.

The content of the compound represented by the formula (X-2-1) is preferably 3% by mass or more, more preferably 6% by mass or more, and particularly preferably 9% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. In addition, the maximum ratio is preferably 20% by mass or less, more preferably 16% by mass or less, even more preferably 12% by mass or less, and particularly preferably 10% by mass or less, in terms of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-2-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (39.1) to the formula (39.4), and preferably contains A compound represented by the formula (39.2).

Further, the compound represented by the formula (X-2) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-2-2).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

The content of the compound represented by the formula (X-2-2) is preferably 3% by mass or more, more preferably 6% by mass or more, and particularly preferably 9% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. In addition, the maximum ratio is preferably 20% by mass or less, more preferably 16% by mass or less, even more preferably 12% by mass or less, and particularly preferably 10% by mass or less, in terms of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-2-2) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (40.1) to the formula (40.4), and preferably contains A compound represented by the formula (40.2).

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (X-3).

(wherein, X ¹⁰² to X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkane having 1 to 4 carbon atoms; Oxy).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

In addition, the compound represented by the formula (X-3) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-3-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

The content of the compound represented by the formula (X-3-1) is preferably 1% by mass or more, and more preferably 2% based on the total amount of the liquid crystal composition of the present invention. The mass% or more is more preferably 3% by mass or more. In addition, the maximum ratio is preferably limited to 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, and particularly preferably 4% by mass or less, in view of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-3-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (41.1) to the formula (41.4), and preferably contains A compound represented by the formula (41.2).

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (X-4).

(In the formula, X ¹⁰² represents a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to three types. the above.

In addition, the compound represented by the formula (X-4) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-4-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to three types. the above.

The content of the compound represented by the formula (X-4-1) is preferably 2% by mass or more, more preferably 5% by mass or more, and particularly preferably 10% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. Further, the maximum ratio is preferably 20% by mass or less, more preferably 17% by mass or less, even more preferably 15% by mass or less, and particularly preferably 13% by mass or less, in view of solubility at low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (X-4-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (42.1) to the formula (42.4), and preferably contains a compound. A compound represented by the formula (42.3).

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (X-5).

(In the formula, X ¹⁰² represents a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to three types. the above.

In addition, the compound represented by the formula (X-5) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-5-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to three types. the above.

Further, the compound represented by the formula (X-5-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (43.1) to the formula (43.4), and preferably contains A compound represented by the formula (43.2).

The compound represented by the formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (X-6).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but is preferably considered to have solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like. One type to two or more types are combined.

The content of the compound represented by the formula (X-6) has an upper limit and a lower limit per embodiment in consideration of characteristics such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The lower limit of the content is, for example, 4% in the total amount of the liquid crystal composition of the present invention, and 5% in another embodiment in one embodiment of the present invention, and is further 5% in another embodiment. 6% is 8% in another embodiment, 9% in still another embodiment, 11% in yet another embodiment, and 14% in yet another embodiment. In still another embodiment, it is 18%.

Further, the upper limit of the content is, for example, 30% in one embodiment of the present invention, 20% in another embodiment, 13% in still another embodiment, and 10% in still another embodiment. In still another embodiment, it is 7%, and in still another embodiment, it is 3%.

Further, the compound represented by the formula (X-6) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (44.1) to the formula (44.4), and it is preferred to contain a formula ( 44.1) and / or a compound of the formula (44.2).

Further, the compound represented by the formula (L) or the compound of the formula (X) is preferably a compound selected from the group represented by the formula (XI).

(wherein, X ¹¹¹ to X ¹¹⁷ each independently represent a fluorine atom or a hydrogen atom, and at least one of X ¹¹¹ to X ¹¹⁷ represents a fluorine atom, and R ¹¹ represents an alkyl group having 1 to 5 carbon atoms and 2 to 2 carbon atoms; An alkenyl group of 5 or an alkoxy group having 1 to 4 carbon atoms, and Y ¹¹ represents a fluorine atom or -OCF ₃ ).

The compound which can be combined is not particularly limited, but it is preferably one to three or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence.

The content of the compound represented by the formula (XI) is considered to have properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 2% in the total amount of the liquid crystal composition of the present invention, and 4% in another embodiment, in another embodiment of the present invention, and in another embodiment 5% is 7% in another embodiment, 9% in still another embodiment, 10% in still another embodiment, and 12% in yet another embodiment, yet another In the embodiment, it is 13%, in still another embodiment, it is 15%, and in still another embodiment, it is 18%.

Further, the upper limit of the content is, for example, one embodiment of the present invention. 30% in the middle, 25% in the other embodiment, 20% in the other embodiment, 15% in the other embodiment, and 10% in the other embodiment, yet another In the embodiment, it is 5%.

When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, the content of the compound represented by the general formula (XI) is preferably a little more suitable. When it is used for a liquid crystal display element having a small driving voltage, it is suitable to make the content of the compound represented by the general formula (XI) slightly larger. Moreover, when it is used for a liquid crystal display element used in a low-temperature environment, the content of the compound represented by the general formula (XI) is preferably a small amount, and the liquid crystal composition used for a liquid crystal display element having a fast response speed is used. In the case where the content of the compound represented by the formula (XI) is slightly smaller, it is suitable.

Further, the compound represented by the formula (XI) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (XI-1).

(wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, and is preferably combined in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, one type is used, and in another embodiment, two types are used, and in still another embodiment, three types or more are combined.

The content of the compound represented by the formula (XI-1) is preferably 1% by mass or more, and more preferably 3, based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 4% by mass or more, more preferably 6% by mass or more, and particularly preferably 8% by mass or more. Further, the maximum ratio is preferably 30% by mass or less, more preferably 28% by mass or less, even more preferably 26% by mass or less, and particularly preferably 24% by mass or less, in view of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (XI-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (45.1) to the formula (45.4), and among them, it is preferred to contain a formula ( 45.2) The compound represented by the formula (45.4) is more preferably a compound represented by the formula (45.2).

Further, the compound represented by the formula (L) or the compound represented by the formula (X) is preferably a compound selected from the group represented by the formula (XII).

(wherein, X ¹²¹ to X ¹²⁶ each independently represent a fluorine atom or a hydrogen atom, and R ¹² represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkyl group having 1 to 4 carbon atoms; Oxy group, Y ¹² represents a fluorine atom or -OCF ₃ ).

The compound which can be combined is not particularly limited, but it is preferably one to three or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to four or more types.

Further, the compound represented by the formula (XII) used in the liquid crystal composition of the present invention is preferably a compound represented by the formula (XII-1).

(In the formula, R ¹² represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound which can be combined is not particularly limited, but it is preferably one to two or more types in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one to three types. the above.

The content of the compound represented by the formula (XII-1) is preferably 1% by mass or more, more preferably 2% by mass or more, and particularly preferably 3% by mass based on the total amount of the liquid crystal composition of the present invention. The above is particularly preferably 4% by mass or more. Further, the maximum ratio is preferably limited to 15% by mass or less, more preferably 10% by mass or less, even more preferably 8% by mass or less, and particularly preferably 6% by mass or less, in view of solubility at low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (XII-1) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (46.1) to the formula (46.4), and among them, it is preferred to contain a formula ( 46.2) to a compound of the formula (46.4).

Further, the compound represented by the formula (XII) is preferably a compound represented by the formula (XII-2).

(In the formula, R ¹² represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

There are no special restrictions on the compounds that can be combined. However, it is preferable to combine one type or two types or more in combination with low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and more preferably one type to three or more types.

The content of the compound represented by the formula (XII-2) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 4% by mass based on the total amount of the liquid crystal composition of the present invention. The above is particularly preferably 6% by mass or more, and particularly preferably 9% by mass or more. Further, in consideration of solubility at low temperature, transfer temperature, electrical reliability, and the like, the maximum ratio is preferably limited to 20% by mass or less. It is more preferably 17% by mass or less, particularly preferably 15% by mass or less, and particularly preferably 13% by mass or less.

Further, the compound represented by the formula (XII-2) used in the liquid crystal composition of the present invention is specifically preferably a compound represented by the formula (47.1) to the formula (47.4), and it is preferred to contain a formula ( 47.2) to a compound of the formula (47.4).

Further, the compound represented by the formula (M) is preferably a compound selected from the group of compounds represented by the formula (XIII).

(wherein, X ¹³¹ to X ¹³⁵ each independently represent a fluorine atom or a hydrogen atom, and R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkane having 1 to 4 carbon atoms; Oxy group, Y ¹³ represents a fluorine atom or -OCF ₃ ).

The kind of the compound which can be combined is not particularly limited, but is preferably It is preferable to contain one type to three types, and it is preferable to contain one type to four types, and it is preferable to contain one type to four types.

The content of the compound represented by the formula (XIII) is considered to have properties such as low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 2% in the total amount of the liquid crystal composition of the present invention, and 4% in another embodiment, in another embodiment of the present invention, and in another embodiment 5% is 7% in another embodiment, 9% in still another embodiment, 11% in yet another embodiment, and 13% in yet another embodiment. In still another embodiment, it is 14%. In still another embodiment, 16%. In still another embodiment, it is 20%.

Further, the upper limit of the content is, for example, 30% in one embodiment of the present invention, 25% in another embodiment, 20% in still another embodiment, and 15% in still another embodiment. In still another embodiment, it is 10%, and in still another embodiment, it is 5%.

When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, the content of the compound represented by the formula (XIII) is preferably a little more suitable. When it is used for a liquid crystal display element having a small driving voltage, it is suitable to make the content of the compound represented by the general formula (XIII) slightly larger. Moreover, when it is used for a liquid crystal display element used in a low-temperature environment, it is suitable to make the content of the compound represented by General formula (XIII) into a little. In the case of a liquid crystal composition used for a liquid crystal display element having a fast response speed, it is suitable to make the content of the compound represented by the general formula (XIII) to be slightly smaller.

Further, the compound represented by the formula (XIII) is preferably a compound represented by the formula (XIII-1).

(In the formula, R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (XIII-1), more preferably 3% by mass or more, and particularly preferably 5 ppm by mass. More preferably, it is 10% by mass or more. Further, the ratio which can be contained at the maximum is preferably 25% by mass or less, more preferably 20% by mass or less, and still more preferably 15% by mass or less.

Further, the compound represented by the formula (XIII-1) is preferably a compound represented by the formula (48.1) to the formula (48.4), more preferably a compound represented by the formula (48.2).

Further, the compound represented by the formula (XIII) is preferably a compound represented by the formula (XIII-2).

(In the formula, R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not particularly limited, but it is preferred to contain one to two or more kinds of these compounds.

The total amount of the liquid crystal composition of the present invention is preferably 5% by mass or more of the compound represented by the formula (XIII-2), more preferably 6% by mass or more, and particularly preferably 8 parts by mass. More preferably, it is 10% by mass or more. Further, the ratio which can be contained at the maximum is preferably 25% by mass or less, more preferably 20% by mass or less, and still more preferably 15% by mass or less.

Further, the compound represented by the formula (XIII-2) is preferably a compound represented by the formula (49.1) to the formula (49.4), more preferably a compound represented by the formula (49.1) or/and the formula (49.2).

Further, the compound represented by the formula (XIII) is preferably a compound represented by the formula (XIII-3).

(In the formula, R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, but it is preferred to contain one to two of these compounds.

The total amount of the liquid crystal composition of the present invention is preferably 2% by mass or more of the compound represented by the formula (XIII-3), more preferably 4% by mass or more, and particularly preferably 9% by mass. More than or equal to %, particularly preferably 11% by mass or more. Further, the ratio which can be contained at the maximum is preferably 20% by mass or less, more preferably 17% by mass or less, and still more preferably 14% by mass or less.

Further, the compound represented by the formula (XIII-3) is preferably a compound represented by the formula (50.1) to the formula (50.4), more preferably a compound represented by the formula (50.1) or/and the formula (50.2).

Further, the compound represented by the formula (M) is preferably a compound selected from the group of compounds represented by the formula (XIV).

(wherein R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; and X ¹⁴¹ to X ¹⁴⁴ each independently represent a fluorine atom or A hydrogen atom, Y ¹⁴ represents a fluorine atom, a chlorine atom or -OCF ₃ , and Q ¹⁴ represents a single bond, -COO- or -CF ₂ O-, and m ¹⁴ is 0 or 1).

The type of the compound which can be combined is not limited, and it is suitable to be used in combination in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, it is one type. Furthermore, in another embodiment of the present invention, there are two types. Alternatively, in another embodiment of the present invention, there are three types. Further, in still another embodiment of the present invention, there are four types. Alternatively, in another embodiment of the present invention, there are five types. Alternatively, in still another embodiment of the present invention, it is six or more types.

The content of the compound represented by the formula (XIV) is considered to have properties such as low-temperature solubility, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 3% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention, and 7% in another embodiment. In still another embodiment, 8% is 11% in another embodiment, 12% in another embodiment, 16% in another embodiment, and 18% in still another embodiment. In still another embodiment, it is 19%. In still another embodiment, it is 22%. In still another embodiment, it is 25%.

Further, the upper limit of the content is, for example, 40% in one embodiment of the present invention, 35% in another embodiment, 30% in still another embodiment, and 25% in still another embodiment. In still another embodiment, it is 20%, and in still another embodiment, it is 15%.

When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small driving voltage, the content of the compound represented by the general formula (XIV) is preferably a little more suitable. Further, in the case of a liquid crystal composition used for a liquid crystal display element having a fast response speed, it is suitable to make the content of the compound represented by the general formula (XIV) slightly smaller.

Further, the compound represented by the formula (XIV) is preferably a compound represented by the formula (XIV-1).

(wherein R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; and Y ¹⁴ represents a fluorine atom, a chlorine atom or -OCF ₃ ).

The kind of the compound which can be combined is not limited, but it is preferable to combine one to three types in consideration of solubility at low temperature, transfer temperature, electrical reliability, birefringence, and the like.

Further, the compound represented by the formula (XIV-1) is preferably a compound represented by the formula (XIV-1-1).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms).

The content of the compound represented by the formula (XIV-1) is preferably 2% by mass or more, more preferably 4% by mass or more, and particularly preferably 7% by mass based on the total amount of the liquid crystal composition of the present invention. The above is particularly preferably 10% by mass or more, and particularly preferably 18% by mass or more. Further, the maximum ratio is preferably limited to 30% by mass or less, more preferably 27% by mass or less, even more preferably 24% by mass or less, and particularly preferably less than 21%, in terms of solubility at low temperature, transfer temperature, electrical reliability, and the like. %.

Further, the compound represented by the formula (XIV-1-1) is specifically preferably a compound represented by the formula (51.1) to the formula (51.4), and preferably a compound represented by the formula (51.1).

Further, the compound represented by the formula (XIV-1) is preferably a compound represented by the formula (XIV-1-2).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms).

The content of the compound represented by the formula (XIV-1-2) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 5, based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 7% by mass or more. Further, the maximum ratio is preferably limited to 15% by mass or less, more preferably 13% by mass or less, even more preferably 11% by mass or less, and particularly preferably less than 9% by mass, in view of low-temperature solubility, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (XIV-1-2) is specifically preferably a compound represented by the formula (52.1) to the formula (52.4), and preferably a compound represented by the formula (52.4).

Further, the compound represented by the formula (XIV) is preferably a compound represented by the formula (XIV-2).

(wherein R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and X ¹⁴¹ to X ¹⁴⁴ each independently represent a fluorine atom or A hydrogen atom, Y ¹⁴ represents a fluorine atom, a chlorine atom or -OCF ₃ ).

The type of the compound which can be combined is not limited, and it is suitable to be used in combination in each embodiment in consideration of solubility at low temperature, transfer temperature, electrical reliability, and birefringence. For example, in one embodiment of the present invention, it is one type. Furthermore, in another embodiment of the present invention, there are two types. Alternatively, in another embodiment of the present invention, there are three types. Further, in still another embodiment of the present invention, there are four types. Alternatively, in another embodiment of the present invention, there are five types.

The content of the compound represented by the formula (XIV-2) is considered to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 3% in the total amount of the liquid crystal composition of the present invention, and 7% in another embodiment, and in another embodiment, 8% is 10% in still another embodiment, 11% in still another embodiment, 12% in still another embodiment, and 18% in still another embodiment. In still another embodiment, it is 19%. In still another embodiment, it is 21%. In still another embodiment, it is 22%.

Further, the upper limit of the content is, for example, 40% in one embodiment of the present invention, 35% in another embodiment, 25% in still another embodiment, and 20% in still another embodiment. In still another embodiment, it is 15%, and in still another embodiment, it is 10%.

When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small driving voltage, the content of the compound represented by the formula (XIV-2) is preferably a little more suitable. Also, when it is a liquid crystal display element with a fast response speed In the case of using a liquid crystal composition, it is suitable to make the content of the compound represented by the formula (XIV-2) to be slightly smaller.

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-1).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (XIV-2-1) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 5, based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 7% by mass or more. Further, the maximum ratio is preferably limited to 15% by mass or less, preferably 13% by mass or less, particularly preferably 11% by mass or less, and particularly preferably less than 9% by mass, in view of solubility at low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (XIV-2-1) is specifically preferably a compound represented by the formula (53.1) to the formula (53.4), and preferably a compound represented by the formula (53.4).

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-2).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (XIV-2-2) is preferably 3% by mass or more, more preferably 6% by mass or more, and particularly preferably 8 based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 10% by mass or more. Further, the maximum ratio is preferably 20% by mass or less, more preferably 17% by mass or less, even more preferably 15% by mass or less, and particularly preferably 14% by mass or less, in view of solubility in low temperature, transfer temperature, electrical reliability, and the like. .

Further, the compound represented by the formula (XIV-2-2) is specifically preferably a compound represented by the formula (54.1) to the formula (54.4), and preferably contains the formula (54.2) and/or the formula (54.4). ) the compound shown.

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-3).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (XIV-2-3) is preferably 5% by mass or more, more preferably 9% by mass or more, and particularly preferably 12% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. Further, in consideration of solubility at low temperature, transfer temperature, electrical reliability, and the like, the maximum ratio is preferably limited to 30% by mass or less, more preferably less than 27% by mass, particularly preferably 24% by mass or less, and particularly preferably less than 20% by mass. %.

Further, the compound represented by the formula (XIV-2-3) is specifically preferably a compound represented by the formula (55.1) to the formula (55.4), and preferably contains the formula (55.2) and/or the formula (55.4). ) the compound shown.

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-4).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The types of the compounds that can be combined are not limited, and are considered to be low-temperature solubility, transfer temperature, electrical reliability, birefringence, etc., and are used in combination in each embodiment. For example, in one embodiment of the present invention, it is one type. Furthermore, in another embodiment of the present invention, there are two types. Alternatively, in still another embodiment of the present invention, it is three or more types.

The content of the compound represented by the formula (XIV-2-4) is considered to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and has an upper limit and a lower limit per embodiment. The lower limit of the content is, for example, 2% in the total amount of the liquid crystal composition of the present invention, and 5% in another embodiment in one embodiment of the present invention, and is further 5% in another embodiment. 8% is 9% in still another embodiment, 10% in still another embodiment, 18% in still another embodiment, and 21% in still another embodiment. In yet another embodiment, it is 22%. In still another embodiment, it is 24%.

Further, the upper limit of the content is, for example, 35% in one embodiment of the present invention, 30% in another embodiment, 25% in still another embodiment, and 20% in still another embodiment. In still another embodiment, it is 15%, and in still another embodiment, it is 10%.

When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small driving voltage, the content of the compound represented by the general formula (XIV-2-4) is preferably a little more suitable. Further, in the case of a liquid crystal composition used for a liquid crystal display element having a fast response speed, it is suitable to make the content of the compound represented by the general formula (XIV-2-4) slightly smaller.

Further, the compound represented by the formula (XIV-2-4) is specifically preferably a compound represented by the formula (56.1) to the formula (56.4), and preferably contains the formula (56.1), the formula (56.2) and A compound of the formula (56.4).

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-5).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (XIV-2-5) is preferably 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 13% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. Further, in consideration of solubility at low temperature, transfer temperature, electrical reliability, and the like, the maximum ratio is preferably limited to 25% by mass or less, more preferably less than 22% by mass, and particularly preferably 18% by mass or less. It is particularly preferably less than 15% by mass.

Further, the compound represented by the formula (XIV-2-5) is specifically a compound represented by the formula (57.1) to the formula (57.4). Among them, it is preferred to contain a compound represented by the formula (57.1).

Further, the compound represented by the formula (XIV-2) is preferably a compound represented by the formula (XIV-2-6).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (XIV-2-6) is preferably 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 15% based on the total amount of the liquid crystal composition of the present invention. More than % by mass. Further, considering the solubility at low temperature, transfer temperature, electrical reliability, etc., the maximum ratio is preferably limited to 25 The mass% or less is more preferably 22% by mass or less, particularly preferably 20% by mass or less, and particularly preferably less than 17% by mass.

Further, the compound represented by the formula (XIV-2-6) is specifically preferably a compound represented by the formula (58.1) to the formula (58.4), and preferably a compound represented by the formula (58.2).

The compound used in the invention of the present invention does not have a peracid (-CO-OO-) structure in the molecule. Further, when attention is paid to the reliability and long-term stability of the liquid crystal composition, it is preferred not to use a compound having a carbonyl group. Further, when importance is attached to the stability of UV irradiation, it is preferred not to use a compound substituted with a chlorine atom.

In the liquid crystal display device of the present invention, a polymerizable compound may be contained in order to produce a liquid crystal display element such as a PS mode, a lateral electric field type PSA mode or a lateral electric field type PSVA mode. Examples of the polymerizable compound that can be used include a photopolymerizable monomer which is polymerized by an energy ray such as light, and the structure includes, for example, a biphenyl derivative or a biphenyl derivative. A polymerizable compound of a liquid crystal skeleton in which a plurality of rings are bonded to each other. More specifically, a difunctional monomer represented by the formula (XX) is preferred.

(wherein, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group, and Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s - (wherein s represents an integer from 2 to 7, the oxygen atom is bonded to the aromatic ring), and Z ²⁰¹ represents -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -CF ₂ O- , -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH -, -COO-CH ₂ CH ₂ -, -OCO-CH ₂ CH ₂ -, -CH ₂ CH ₂ -COO-, -CH ₂ CH ₂ -OCO-, -COO-CH ₂ -, -OCO-CH ₂ -, -CH ₂ -COO-, -CH ₂ -OCO-, -CY ¹ =CY ² - (wherein Y ¹ and Y ² each independently represent a fluorine atom or a hydrogen atom), -C≡C- or a single The bond, M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all of the 1,4-phenylene groups in the formula may be substituted by a fluorine atom.

X ²⁰¹ and X ^{202 each} represent a diacrylate derivative of a hydrogen atom, and a dimethacrylate derivative each having a methyl group, preferably one of which represents a hydrogen atom and the other represents a methyl group. Also preferred. The polymerization rate of these compounds is the fastest in the diacrylate derivative, the dimethacrylate derivative is slow, and the asymmetric compound is in the middle thereof, and the preferred aspect can be used according to the use thereof. Among the PSA display elements, dimethacrylate derivatives are particularly preferred.

Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -, but in the PSA display element, preferably at least one is a single bond, Preferred are all compounds which represent a single bond, or one of which is a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -. In this case, an alkyl group of 1 to 4 is preferable, and s is preferably 1 to 4.

Z ^{201 is} preferably -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -CF ₂ O-, -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ - or The key is more preferably -COO-, -OCO- or a single bond, and particularly preferably a single bond.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which an arbitrary hydrogen atom may be substituted by a fluorine atom, and is preferably a 1,4-phenylene group or a single bond. When C represents a ring structure other than a single bond, Z ^{201 is} also preferably a linking group other than a single bond, and when M ²⁰¹ is a single bond, Z ^{201 is} preferably a single bond.

Based on these points, in the general formula (XX), the ring structure between Sp ²⁰¹ and Sp ²⁰² is specifically preferably the structure described below.

In the formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed by two rings, it preferably represents the following formula (XXa-1) to formula (XXa-5), and more preferably represents the formula (XXa-1). ) to the formula (XXa-3), especially the formula (XXa-1).

(wherein both ends are bonded to Sp ²⁰¹ or Sp ²⁰² ).

The polymerizable compound containing these skeletons is most suitable for a PSA type liquid crystal display element because of the alignment control force after polymerization, and a good alignment state is obtained. Therefore, display unevenness is suppressed or does not occur at all.

From the above, as the polymerizable monomer, the formula (XX-1) to the formula (XX-4) are particularly preferable, and among them, the formula (XX-2) is most preferable.

(wherein, Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms).

When a monomer is added to the liquid crystal composition of the present invention, polymerization is carried out even when the polymerization initiator is not present, but a polymerization initiator may be contained in order to promote polymerization. Benzoyl ether as a polymerization initiator Classes, diphenylketones, acetophenones, benzyl ketals, mercaptophosphine oxides, and the like.

The liquid crystal composition in the present invention may further contain a compound represented by the formula (Q).

(wherein R ^Q represents a linear alkyl group or a branched alkyl group having 1 to 22 carbon atoms, and one or two or more CH ₂ groups in the alkyl group are not directly adjacent to each other in an oxygen atom; Substituted by -O-, -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, M ^Q represents trans-1,4 - a cyclohexyl group, a 1,4-phenylene group or a single bond).

R ^Q represents a linear alkyl group or a branched alkyl group having 1 to 22 carbon atoms, and one or more of the CH ₂ groups in the alkyl group may be -O- in such a manner that the oxygen atoms are not directly adjacent to each other. , -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, preferably a linear alkane having from 1 to 10 carbon atoms a linear alkyl group, a linear alkoxy group, a linear CH ₂ group substituted with -OCO- or -COO-, a branched alkyl group, a branched alkoxy group, and a CH ₂ group substituted with -OCO a branched alkyl group of -OR-COO-, more preferably a linear alkyl group having 1 to 20 carbon atoms, a linear alkyl group in which 1 CH ₂ group is substituted with -OCO- or -COO-, a branched alkyl group The base, the branched alkoxy group, and one CH ₂ group are substituted with a branched alkyl group of -OCO- or -COO-. M ^Q represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, preferably a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

More specifically, the compound represented by the formula (Q) is preferably a compound represented by the following formula (Q-a) to formula (Q-d).

In the formula, R ^{Q1 is} preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms, and R ^{Q2 is} preferably a linear alkyl group or a branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is more preferred. Preferred is a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group, and L ^{Q is} preferably a linear alkyl group or a branch having 1 to 8 carbon atoms. Chain alkyl. Among the compounds represented by the formula (Qa) to the formula (Qd), a compound represented by the formula (Qc) and the formula (Qd) is more preferred.

In the liquid crystal composition of the present invention, it is preferred to contain one or two kinds of compounds represented by the formula (Q), more preferably one to five, and the content thereof is preferably from 0.001 to 1% by mass. More preferably, it is 0.001 to 0.1% by mass, and particularly preferably 0.001 to 0.05% by mass.

The liquid crystal composition containing a polymerizable compound of the present invention is capable of polymerizing a polymerizable compound contained therein by ultraviolet irradiation to impart a liquid crystal alignment ability, and is used for liquid crystal which controls the amount of light transmitted by the birefringence of the liquid crystal composition. Display component. In the liquid crystal display element, suitable For AM-LCD (Active Matrix Liquid Crystal Display Element), TN (Nematic Liquid Crystal Display Element), STN-LCD (Super Twisted Nematic Liquid Crystal Display Element), OCB-LCD, IPS-LCD (In-Plane Switching Liquid Crystal Display Element) And FFS (liquid crystal display element of fringe field switching mode), which is particularly suitable for AM-LCD, can be used for a transmissive or reflective liquid crystal display element.

The two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material such as glass or plastic, and one of them can also be made of an opaque material such as tantalum. The transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

The color filter can be produced, for example, by a pigment dispersion method, a printing method, an electrodeposition method, a dyeing method, or the like. An example of a method for producing a color filter by a pigment dispersion method is to apply a curable coloring composition for a color filter to a transparent substrate, apply a patterning treatment, and then heat or lightly irradiate. Harden. By performing this step for each of the three colors of red, green, and blue, a pixel portion for a color filter can be formed. Further, a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.

The substrates are opposed to each other such that the transparent electrode layer is inside. In this case, the interval between the substrates can also be adjusted via the spacer. In this case, it is preferred to adjust so that the thickness of the obtained light control layer is 1 to 100 μm. It is more preferably 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d in such a manner that the contrast is maximized. Moreover, when there are two polarizing plates, the polarizing axis of each polarizing plate can also be adjusted, and the viewing angle or contrast is adjusted in a good manner. whole. Further, in order to increase the viewing angle, a retardation film can also be used. Examples of the spacer include a columnar spacer formed of glass particles, plastic particles, alumina particles, a photoresist material, or the like. Then, a sealant such as an epoxy thermosetting composition is screen-printed on the substrate in the form of a liquid crystal injection port, and the substrates are bonded to each other and heated to thermally cure the sealant.

A method of sandwiching a liquid crystal composition containing a polymerizable compound between two substrates can be carried out by a usual vacuum injection method, an ODF method, or the like. In the vacuum injection method, although there is no dripping trace, there is a problem that the trace of the injection remains. In the invention of the present invention, it is more suitable for manufacturing a display element using the ODF method. In the liquid crystal display element manufacturing step of the ODF method, an epoxy-based photothermal heat is used as a closed-loop embankment in a sealing agent such as hardenability by using a dispenser on any of the back sheet or the front sheet. After dropping a specified amount of the liquid crystal composition under degassing, the front plate and the back plate are bonded to each other to manufacture a liquid crystal display element. The liquid crystal composition of the present invention can be suitably used because the dropping of the liquid crystal composition is carried out in the ODF step.

As a method of polymerizing the polymerizable compound, in order to obtain a good alignment property of the liquid crystal, it is preferred to have a moderate polymerization rate. Therefore, it is preferred to polymerize by direct or alternately or alternately irradiating active energy rays such as ultraviolet rays or electron beams. The method. When using ultraviolet light, a polarized light source or a non-polarized light source can be used. In addition, when the liquid crystal composition containing the polymerizable compound is sandwiched between the two substrates, the substrate on the irradiation surface side must have appropriate transparency to the active energy ray. Further, it is also possible to use a mask to illuminate only a specific portion when irradiated with light. The means for changing the alignment state of the unpolymerized portion by changing the conditions of the electric field, the magnetic field or the temperature, and then irradiating the active energy ray to cause polymerization. In particular, in the case of ultraviolet light exposure, it is preferred to perform ultraviolet exposure while applying an alternating electric field to the liquid crystal composition containing the polymerizable compound. The applied alternating electric field is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on the desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the liquid crystal display device of the transverse electric field type MVA mode, it is preferable to control the pretilt angle from 80 to 89.9 degrees from the viewpoint of alignment stability and contrast.

The temperature at the time of irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Preferably, the polymerization is carried out at a temperature close to room temperature, i.e., typically at a temperature of from 15 to 35 °C. As the lamp for generating ultraviolet rays, a metal halide lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, or the like can be used. Further, as the wavelength of the ultraviolet ray to be irradiated, it is preferred to irradiate the ultraviolet ray which is not in the wavelength range of the absorption wavelength range of the liquid crystal composition, and it is preferable to use the ray for cutting ultraviolet rays as needed. The intensity of the ultraviolet ray to be irradiated is preferably from 0.1 mW/cm ² to 100 W/cm ² , more preferably from 2 mW/cm ² to 50 W/cm ² . The energy of the ultraviolet ray to be irradiated can be suitably adjusted, and is preferably from 10 mJ/cm ² to 500 J/cm ² , more preferably from 100 mJ/cm ² to 200 J/cm ² . When the ultraviolet ray is irradiated, the intensity can also be changed. The time for irradiating the ultraviolet rays is appropriately selected depending on the intensity of the ultraviolet rays to be irradiated, and is preferably from 10 seconds to 3600 seconds, more preferably from 10 seconds to 600 seconds.

The liquid crystal display element using the liquid crystal composition of the present invention can be used to coexist high-speed response and display failure, and is particularly useful for active The liquid crystal display element for matrix driving can be applied to a liquid crystal display element for VA mode, PSVA mode, PSA mode, IPS mode, FFS mode or ECB mode.

Hereinafter, a preferred embodiment of the liquid crystal display device of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a cross-sectional view showing a liquid crystal display device including two substrates facing each other, a sealing material provided between the substrates, and a liquid crystal sealed in a closed region surrounded by the sealing material.

Specifically, a specific aspect of the liquid crystal display device is provided, and the TFT substrate 102 and the pixel electrode 103 are provided on the first substrate 100, and a back sheet of the passivation film 104 and the first alignment film 105 is provided thereon; On the second substrate 200, a black matrix 202, a color filter 203, a flattening film (cover layer) 201, and a transparent electrode 204 are provided, and a second alignment film 205 is provided from above to face the front plate. a sealing material 301 disposed between the substrates; and a liquid crystal layer 303 enclosed in the area of the enclosed area surrounded by the sealing material; wherein the substrate surface of the sealing material 301 is in contact with a protrusion (columnar spacer) 302, 304.

The material of the first substrate or the second substrate is not particularly limited as long as it is substantially transparent, and glass, ceramics, plastic, or the like can be used. As the plastic substrate, cellulose derivatives such as cellulose, triacetyl cellulose, and diethyl phthalocyanine, polycycloolefin derivatives, polyethylene terephthalate, polyethylene naphthalate, and the like can be used. Polyester, polycarbonate, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyamide, polyimine, polyamidamine, polyphenylene Ethylene, polyacrylate, polymethyl methacrylate, polyether oxime, poly aryl An ester, and an inorganic-organic composite material such as a glass fiber-epoxy resin, a glass fiber-acrylic resin, or the like.

Further, when a plastic substrate is used, it is preferable to provide a barrier film. The function of the barrier film is to lower the moisture permeability of the plastic substrate and to improve the reliability of the electrical characteristics of the liquid crystal display element. The barrier film is not particularly limited as long as it has high transparency and low water vapor permeability. Generally, an inorganic material such as cerium oxide is used, by vapor deposition or sputtering, and gel permeation chromatography (CVD). The film formed by the method).

In the present invention, the first substrate or the second substrate may be the same material or different materials, and is not particularly limited. When a glass substrate is used, a liquid crystal display element excellent in heat resistance and dimensional stability can be produced. Further, in the case of a plastic substrate, it is preferably a method of producing a roll-to-roll method, and is preferably lighter or more flexible. In addition, in order to provide flatness and heat resistance, good results can be obtained by combining a plastic substrate and a glass substrate.

Further, in the embodiment described later, a substrate made of the material of the first substrate 100 or the second substrate 200 is used.

In the back sheet, the TFT layer 102 and the pixel electrode 103 are provided on the first substrate 100. These can be manufactured by the usual array steps. The passivation film 104 and the first alignment film 105 are provided thereon to obtain a back sheet.

The passivation film 104 (also referred to as an inorganic protective film) is a film for protecting a TFT, and a nitride film (SiNx), an oxide film (SiOx), or the like is usually formed by a chemical vapor deposition (CVD) technique or the like.

Further, the first alignment film 105 has a function of aligning the liquid crystal, and a polymer material such as polyimine is usually used. In the coating liquid, An alignment agent solution made of a polymer material and a solvent is used. The alignment film is coated in the closed region due to the possibility of blocking the adhesion of the sealing material. A printing method such as an offset printing method, a droplet discharge method such as inkjet is used for coating. The coated alignment agent solution is cured by crosslinking after evaporation of the solvent by temporary drying. Then, in order to exhibit the alignment function, alignment processing is performed.

The alignment process is usually performed by a rubbing method. The liquid crystal alignment ability is produced by unidirectional rubbing on a polymer film formed as described above by using a rubbing cloth made of fibers such as ruthenium.

Also, there is also the use of the optical alignment method. The photo-alignment method produces a aligning ability by irradiating a polarized light on an alignment film containing a photoreceptive organic material, and does not cause damage or dust of the substrate due to the rubbing method. As an example of the organic material of the photo-alignment method, there is a material containing a dichroic dye. As the dichroic dye, an alignment induction or isomerization reaction (for example, azobenzene) or a dimerization reaction of a molecule caused by a Weigert effect due to photochromism can be used (example: Cassia ruthenium), photocrosslinking reaction (eg diphenyl ketone group) or photodecomposition reaction (eg poly(fluorene imino group)) is the basis of photoreaction of the origin of liquid crystal alignment ability (hereinafter referred to as photo-alignment) Base). The applied alignment agent solution is obtained by evaporating a solvent by temporary drying, and by irradiating light having any deviation (polarization), an alignment film having an alignment ability in an arbitrary direction can be obtained.

The front plate on one side is provided with a black matrix 202, a color filter 203, a planarizing film 201, a transparent electrode 204, and a second alignment film 205 on the second substrate 200.

The black matrix 202 is produced, for example, by a pigment dispersion method. specifically On the second substrate 200 provided with the barrier film 201, a colored resin liquid in which a black colorant for forming a black matrix is uniformly dispersed is applied to form a colored layer. Next, the colored layer is baked to be hardened. The photoresist is coated thereon and pre-baked. After the photoresist is exposed by the mask pattern, development is performed to pattern the colored layer. Then, the photoresist layer is peeled off, and the colored layer is baked to complete the black matrix 202.

Alternatively, a photoresist type pigment dispersion liquid can also be used. At this time, a photoresist type pigment dispersion liquid is applied, and after prebaking, after exposure by a mask pattern, development is performed, and the colored layer is patterned. Then, the photoresist layer is peeled off, and the colored layer is baked to complete the black matrix 202.

The color filter 203 is formed by a pigment dispersion method, an electrodeposition method, a printing method, a dyeing method, or the like. In the case of the pigment dispersion method, a colored resin liquid in which a pigment (for example, red) is uniformly dispersed is applied onto the second substrate 200, and after baking curing, a photoresist is applied thereon to perform prebaking. After the photoresist is exposed by the mask pattern, development is performed and patterned. The photoresist layer is then stripped and the (red) color filter 203 (203a) is completed by baking. The order of coloring is not particularly limited. Similarly, a green color filter 203 (203b) and a blue color filter 203 (203c) are formed.

The transparent electrode 204 is provided on the color filter 203 (the overcoat layer (201) for surface flattening is provided on the color filter 203 as needed). The transparent electrode 204 preferably has a high transmittance, and preferably has a small resistance. The transparent electrode 204 is formed of an oxide film of ITO or the like by a sputtering method or the like.

Further, for the purpose of protecting the transparent electrode 204, a passivation film may be provided on the transparent electrode 204.

The second alignment film 205 is the same as the first alignment film 105 described above.

In the above, the above-mentioned back sheet and the front sheet used in the present invention are described in a specific aspect, but are not limited to the specific aspect in the present case, and the liquid crystal display element according to the desired aspect is freely available. change.

The shape of the columnar spacer is not particularly limited, and various shapes such as a polygonal shape such as a circular shape or a quadrangular shape may be used, but it is preferable to consider a misalign margin during the process. To make the horizontal section a circular or regular polygon. Further, the shape of the protrusion is preferably a truncated cone or a truncated cone.

The material of the columnar spacer is not particularly limited as long as it is an organic solvent or a liquid crystal which is used for the sealing material or the sealing material, and is preferably a synthetic resin from the viewpoint of processing and weight reduction. Curable resin). On the other hand, the protrusions may be provided on the sealing material interface on the first substrate by a method of lithography or a droplet discharge method. For such reasons, it is preferred to use a photocurable resin suitable for lithography or a droplet discharge method.

As an example, the case where the aforementioned columnar spacer is obtained by the lithography method will be described. Fig. 2 is a view showing a step of exposing a pattern using a columnar spacer formed on a black matrix as a mask pattern.

A resin liquid for forming a columnar spacer (excluding a colorant) is applied onto the transparent electrode 204 of the front plate. Next, the resin layer 402 is baked and hardened. The photoresist is coated thereon and pre-baked. After the photoresist is exposed by the mask pattern 401, development is performed to pattern the resin layer. Then, the photoresist layer is peeled off, and the resin layer is baked to complete the columnar spacer (302, 0304 in Fig. 1).

The position at which the column spacers are formed can be positioned at a desired position by a mask pattern. Therefore, both the closed region of the liquid crystal display element and the outside of the closed region (the sealing material coating portion) can be simultaneously formed. Moreover, it is preferable to form a columnar spacer so that the quality of the closed region does not decrease, and it can be positioned above the black matrix. The column spacers thus produced by the lithography method are referred to as cylindrical spacers or photo spacers.

The material of the spacer is a mixture of a negative water-soluble resin such as a PVA-fluorene azo photosensitive resin or a polyfunctional acrylic monomer, an acrylic copolymer, or a triazole-based initiator. Alternatively, there is a method of using a color resin in which a coloring agent is dispersed in a polyimide resin. In the present invention, it is not particularly limited, and a spacer can be obtained from a well-known material depending on the liquid crystal to be used or the compatibility with the sealing material.

In this manner, after the columnar spacer is provided on the surface of the front plate which is the closed region, a sealing material (301 in FIG. 1) is applied to the sealing material contact surface of the back plate.

The material of the sealing material is not particularly limited, and a curable resin composition in which a polymerization initiator is added to an epoxy-based or acrylic-based photocurable, thermosetting, or photocurable resin can be used. Further, in order to control moisture permeability, elastic modulus, viscosity, and the like, a filler composed of an inorganic substance or an organic substance may be added. The shape of these fillers is not particularly limited and may be spherical, fibrous, amorphous or the like. Further, in order to control the cell gap well, a spherical or fibrous slit material having a monodisperse diameter is mixed, or in order to further strengthen the adhesion to the substrate, a fibrous substance which is easily entangled with the protrusion on the substrate may be mixed. The diameter of the fibrous material used at this time is preferably about 1/5 to 1/10 of the cell gap, and the length of the fibrous substance is long. The degree is shorter than the seal coating width.

In addition, the material of the fibrous material is not particularly limited as long as it has a predetermined shape, and synthetic fibers such as cellulose, polyamide or polyester, or inorganic materials such as glass or carbon can be suitably selected.

As a method of applying the sealing material, there is a printing method or a dispensing method, but it is preferable to use a dispensing method in which the amount of the sealing material used is small. The coating position of the sealing material is usually on a black matrix in order not to adversely affect the enclosed area. In order to form the liquid crystal dropping region of the next step (in such a manner that the liquid crystal does not leak), the sealing material coating shape is a closed loop shape.

The liquid crystal was dropped on the closed-loop shape (closed region) of the front plate coated with the aforementioned sealing material. A dispenser is usually used. The amount of liquid crystal dropped is the same as the volume of the liquid crystal cell, and is substantially the same as the volume by which the height of the column spacer and the sealed coating area are multiplied. However, in order to optimize liquid crystal leakage or display characteristics in the cell bonding step, the amount of liquid crystal dropped may be appropriately adjusted, and the liquid crystal dropping position may be dispersed.

Next, the sealing material is applied, and the back sheet is bonded to the front plate on which the liquid crystal has been dropped. Specifically, the front plate and the back plate are adsorbed by a stage having a mechanism for adsorbing the substrate such as an electrostatic chuck, and the second alignment film of the front plate faces the first alignment film of the back plate, and is disposed between the sealing material and the other The position (distance) at which the side substrates do not meet. In this state, the internal pressure is reduced. After the completion of the pressure reduction, the position of the two substrates (alignment operation) was adjusted while confirming the bonding position of the front plate and the back plate. If the adjustment of the bonding position is completed, the substrate is brought close to the position where the sealing material on the front plate is in contact with the backing plate. In this state, the inert gas is filled in the system, and the pressure is returned to the normal pressure while gradually opening the pressure. At this time, the front plate and the back plate are attached by atmospheric pressure, and the column is interposed. The height position of the spacer forms a cell gap. In this state, the sealing material is irradiated with ultraviolet rays to cure the sealing material to form a liquid crystal cell. Then, depending on the case, a heating step is applied to promote hardening of the sealing material. In order to enhance the adhesion of the sealing material or to improve the reliability of the electrical characteristics, a heating step is applied.

[Examples]

The invention is illustrated in more detail below by the examples, but the invention is not limited by the examples. Moreover, "%" in the compositions of the following examples and comparative examples means "% by mass".

In the examples, the measured characteristics are as follows.

Tni: nematic phase-isotropic liquid phase transfer temperature (°C)

Δn: refractive index anisotropy at 295 K (alias: birefringence)

△ ε: dielectric anisotropy at 295K

η: viscosity at 295K (mPa‧s)

Γ1: Rotational viscosity at 295K (mPa‧s)

VHR: Voltage holding ratio at 313K at a frequency of 60 Hz and a voltage of 5 V (%)

Burning:

The cauterization evaluation of the liquid crystal display element is performed by displaying the predetermined fixed pattern for 1440 hours in the display area, and when the full-screen uniform display is performed, the degree of the residual image of the fixed pattern is visually recognized by the following four levels.

◎ no afterimage

○ There are very few afterimages, but it is also tolerable

△ There is an afterimage, the degree that cannot be tolerated

× There is an afterimage, quite inferior

Volatile/manufacturing device contamination:

The volatility evaluation of the liquid crystal material was carried out by observing the operation state of the vacuum stirring defoaming mixer while illuminating by a stroboscope, and visually observing the foaming of the liquid crystal material. Specifically, the capacity of the vacuum container for dedicated off 2.0L stirred mixer of the bubble in the liquid crystal composition was added 0.8kg, degassed under 4kPa, the revolution speed at 15S ^-1, the rotation speed of operation of the vacuum to 7.5S ^-1 The agitating defoaming mixer was carried out by the following four evaluations by the time until the start of foaming.

◎ 3 minutes or more before foaming. The possibility of contamination of the device caused by volatilization is low.

○ 1 minute or more and less than 3 minutes before foaming. There are concerns about slight device contamination caused by volatilization.

△ 30 seconds or more and less than 1 minute before foaming. Device contamination caused by volatilization.

× Within 30 seconds before foaming. There are concerns about the pollution of major equipment made by volatilization.

Process suitability:

The process suitability is based on the ODF process. The fixed-volume metering pump is used to drop the liquid crystal at 40pL every 100 times, and the following four levels are used to evaluate the following "0~200 times, 201~400 times, 401~600". The change in the amount of liquid crystal dropped by 200 times each time, ‧ ‧ ‧ 990 801 ~ 100,000 times

◎ Very small change (can stably manufacture liquid crystal display elements)

○ There is a slight change, but it is also tolerable

△ There is a change, the degree of unacceptable (because of unevenness, the yield changes) difference)

× There is a change, quite inferior (liquid crystal leakage or vacuum bubble occurs)

Solubility at low temperatures:

In the evaluation of the solubility at low temperature, after modulating the liquid crystal composition, 0.5 g of the liquid crystal composition was weighed in a 1 mL sample vial, and in the temperature-controlled test tank, the following was regarded as one cycle "-20 ° C ( 1 hour hold) → temperature rise (0.2 ° C / min) → 0 ° C (1 hour hold) → temperature rise (0.2 ° C / min) → 20 ° C (1 hour hold) → temperature drop (-0.2 ° C / min) → 0 °C (1 hour hold) → temperature drop (-0.2 ° C / min) → -20 ° C", the temperature change was continuously applied, and the occurrence of precipitates from the liquid crystal composition was visually observed, and the following four grades were evaluated.

◎ No precipitate was observed for 600 hours or more.

○ No precipitate was observed for 300 hours or more.

△ The precipitate was observed within 150 hours.

× Precipitate was observed within 75 hours.

(Example 1)

The composition shown below was prepared. The physical properties of the composition of Example 1 are shown in Table 1.

(Comparative Example 1)

The composition shown below which does not contain the compound represented by the above formula (i) is prepared. The physical properties of the composition of Comparative Example 1 are shown in Table 2.

(Comparative Example 2)

The composition shown below which does not contain the compound represented by the above formula (ii) is prepared. The physical properties of the composition of Comparative Example 2 are shown in Table 3.

(Example 2)

The composition shown below was prepared. The physical properties of the composition of Example 2 are shown in Table 4.

The composition of Example 1 is Tni high, has an appropriate value of Δn, Δε is large, and η is also a low viscosity suitable for high-speed response.

In Comparative Example 1, in place of the compound represented by the formula (i), T-1 and T-2 (a compound of a diphenylacetylene system) were used. Although Tni and Δn were combined in the same degree as in Example 1, the viscosity η increased.

In Comparative Example 2, the compound represented by the formula (ii) was not contained, but Tni and Δn were combined in the same manner as in Example 1, but the Δε system was greatly reduced.

The composition of Example 2, although the content of the formula (III-2.1) of the compound represented by the formula (III-1) is higher than that of the example 1, the viscosity η is the same as that of the example 1, and the Tni system is the same. Higher, Δn, Δε are also preferred values.

(Example 3)

The composition shown below was prepared. The physical properties of the composition of Example 3 are shown in Table 5.

(Example 4)

The composition shown below was prepared. The physical properties of the composition of Example 4 are shown in Table 6.

(Example 5)

The composition shown below was prepared. The physical properties of the composition of Example 5 are shown in Table 7.

(Example 6)

The composition shown below was prepared. The physical properties of the composition of Example 6 are shown in Table 8.

(Example 7)

The composition shown below was prepared. The physical properties of the composition of Example 7 are shown in Table 9.

(Example 8)

The composition shown below was prepared. The physical properties of the composition of Example 8 are shown in Table 10.

(Example of liquid crystal display device)

Using the liquid crystal compositions described in Examples 1 to 3, an IPS type liquid crystal display device having the structures shown in Figs. 1 and 2 was produced. This liquid crystal display device has excellent display characteristics (refer to Table 11), and maintains stable display characteristics for a long period of time.

[Industrial availability]

A composition in which Δε shows a positive value and is stable to heat or light is provided.

100‧‧‧1st substrate

102‧‧‧TFT layer

103‧‧‧ pixel electrodes

104‧‧‧passivation film

105‧‧‧1st alignment film

200‧‧‧2nd substrate

201‧‧‧Flating film (covering layer)

202‧‧‧Black matrix

203‧‧‧Color filters

204‧‧‧Transparent electrode

205‧‧‧2nd alignment film

301‧‧‧ sealing material

302‧‧‧protrusions (columnar spacers)

303‧‧‧Liquid layer

304‧‧‧protrusions (columnar spacers)

401‧‧‧ mask pattern

402‧‧‧ resin layer

Fig. 1 is a cross-sectional view showing a liquid crystal display element of the present invention. A substrate having 100 to 105 is referred to as a "back plate", and a substrate having 200 to 205 is referred to as a "front plate".

Fig. 2 is a view showing an exposure processing step of using a columnar spacer formed on a black matrix as a mask pattern.

Claims (7)

A composition containing one or more compounds represented by the following formula (i), containing one or more compounds represented by the following formula (ii), and a formula (i) The content of the compound shown is 5 to 30%, and the content of the compound represented by the formula (ii) is 5 to 25%; (wherein R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may be independently -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substitution, X ⁱ¹ ~X ⁱ⁶ each independently represent a hydrogen atom or a fluorine atom, and X ⁱⁱ¹ represents a hydrogen atom, Fluorine or chlorine atom). A composition according to claim 1, wherein one of X ⁱ¹ to X ⁱ⁶ of the formula (i) is a fluorine atom. The composition of claim 1, wherein X ⁱⁱ¹ of the formula (ii) is a fluorine atom. A composition according to claim 1 which contains a compound represented by the following formula (L), (wherein R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may independently be -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substitution, OL means 0, 1, 2 or 3, B ^L1 , B ^L2 and B ^L3 are each independently represented Free (a) 1,4-cyclohexylene (one -CH ₂ - or two or more -CH ₂ - groups not present in this group may be substituted into -O-) and (b) 1, a group of 4-phenylene (a group of -CH= or 2 or more non-contiguous -CH= may be substituted by -N=) present in the group, the group (a) The group (b) may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, and L ^L1 and L ^L2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡ C-, when OL is 2 or 3, L ^L2 complex number exists, they may be the same or different, when OL is 2 or 3, B ^L3 complex number exists, they may be the same or different, only formula (i ) the compound shown and the compound represented by the formula (ii)). A composition according to claim 1 which contains a compound represented by the following formula (M), (wherein R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent -CH ₂ - groups may independently be -CH=CH-, -C≡ C-, -O-, -CO-, -COO- or -OCO-substituted, PM represents 0, 1, 2, 3 or 4, and C ^M1 and C ^M2 each independently represent a selected from (d) 1,4- Cyclohexyl group (one -CH ₂ - or two or more -CH ₂ - groups not present in this group may be substituted into -O- or -S-) and (e) 1,4-phenylene a group in the group consisting of one -CH= or two or more non-contiguous -CH= can be substituted into -N=), the group (d), base (e Each of them may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, and K ^M1 and K ^M2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -OCF ₂ -, -CF ₂ O-, -COO-, -OCO- or -C≡C-, when PM is 2, 3 or 4, K ^{M1 is} plural, they may be the same or phase When PM is 2, 3 or 4, and C ^{M2 is} present in plural, they may be the same or different, X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom, and X ^M2 represents a hydrogen atom and fluorine. Atom, chlorine atom, cyano group, trifluoromethyl group, fluoromethoxy group, Difluoromethoxy, trifluoromethoxy or 2,2,2-trifluoroethyl group; but excluding the compound represented by general formula (i) and the compound of general formula (ii) is). A liquid crystal display element using the composition as in the first aspect of the patent application. An IPS element using the composition of claim 1 of the scope of the patent application.