JP6992274B2 - Liquid crystal display element - Google Patents

Description

The present invention relates to a composition having a negative dielectric anisotropy (Δε), which is useful as a liquid crystal display material, and a liquid crystal display device using the same.

Liquid crystal display devices using a composition in which Δε shows a negative value are widely used in liquid crystal televisions and the like, and the compositions used in these applications are required to have high characteristics. For example, it has various characteristics such as high nematic phase upper limit temperature T _ni , large Δε, low rotational viscosity (γ ₁ ), and nematic phase stability at low temperature. Further, there are demands such as display defects such as seizure of the display element are less likely to occur, drip marks are less likely to occur during manufacturing, and stable ejection performance of the composition in the ODF process is required, which cannot be dealt with by the conventional liquid crystal composition. It has been (Patent Documents 1 to 3).

WO2014 / 006963 WO2014 / 148197 WO2015 / 060056

The problem to be solved by the present invention is that the nematic phase is exhibited in a wide temperature range, and the nematic at a low temperature of γ ₁ without deteriorating various characteristics as a liquid crystal display element such as Δn and Δε and the burn-in characteristics of the display element. It is an object of the present invention to provide a composition having phase stability, which is less likely to generate dripping marks during production, and which is less likely to volatilize in an ODF step, and a liquid crystal display element using the same.

The present inventor has studied various liquid crystal compounds and found that the above problems can be solved by using a specific liquid crystal compound, and has completed the present invention.

A composition containing one or more compounds represented by the general formula (i).

(In the formula, R ⁱ¹ and R ⁱ² independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, respectively.
X ⁱ¹ , X ⁱ² , X ⁱ³ and X ⁱ⁴ may be independently substituted with a hydrogen atom and a halogen atom, respectively. Alkyl group having 1 to 3 carbon atoms and a halogen atom may be substituted. It represents 1 to 3 alkoxy groups or halogen atoms, but at least one of X ⁱ¹ , X ⁱ² , X ⁱ³ and X ⁱ 4 represents a hydrogen atom. )

The composition having negative dielectric anisotropy of the present invention is γ ₁ , nematic at low temperature without deteriorating various characteristics as a liquid crystal display element such as T _ni , Δn, Δε and the seizure characteristics of the display element. Phase stability, dripping marks during manufacturing are unlikely to occur, volatilization is difficult to occur in the ODF process, and changes in specific resistance and voltage retention due to heating and light irradiation are extremely small, so the product is highly practical and reliable. A liquid crystal display element such as a VA system or an FFS system using the above can achieve a high-speed response at a desired drive voltage. In addition, the composition of the present invention is very useful because it can be produced with a high yield by suppressing display defects caused by the process.

As described above, the present invention relates to a composition containing a specific compound, a liquid crystal display element using the composition, a PSA element, a VA element or an FFS element using the composition. Hereinafter, embodiments of the composition in the present invention will be described first.

The present composition is preferably a liquid crystal display at room temperature, preferably exhibits a nematic phase, and is preferably a so-called n-type composition in which the value of Δε is negative.

The composition of the present invention contains one or more compounds represented by the general formula (i).

In the general formula (i), R ⁱ¹ and R ⁱ² are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms, and an alkyl group having 1 to 4 carbon atoms. The group or an alkoxy group having 1 to 4 carbon atoms is preferable, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms is preferable, and a linear group is preferable. R ⁱ¹ is preferably an alkyl group having 1 to 5 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms, and is linear. Is preferable. R ⁱ² is preferably an alkoxy group having 1 to 5 carbon atoms, preferably an alkoxy group having 1 to 4 carbon atoms, preferably an alkoxy group having 1 to 3 carbon atoms, and is linear. Is preferable. The total number of carbon atoms and oxygen atoms in R ⁱ¹ and R ⁱ² is preferably 2,3,4,5,6 or 7, preferably 3,4,5,6 or 7. , 5 or 6, preferably 5 or 6.

X ⁱ¹ , X ⁱ² , X ⁱ³ and X ⁱ⁴ are each independently preferably a hydrogen atom, a fluorine atom, a chlorine atom, a trifluoromethyl group or a trifluoromethoxy group, and are preferably a hydrogen atom, a fluorine atom or a trifluoro atom. It is preferably a methoxy group, preferably a hydrogen atom or a fluorine atom. It is preferable that one of ^Xi1 , ^Xi2 , ^Xi3 and ^{Xi4 is a hydrogen atom, one of Xi1 , Xi2} , ^Xi3 and ^Xi4 is a hydrogen atom, and the other three are fluorine atoms. It is preferably a chlorine atom, a trifluoromethyl group or a trifluoromethoxy group, one of X ⁱ¹ , X ⁱ² , X ⁱ³ and X ⁱ⁴ being a hydrogen atom and the other three being a fluorine atom or a chlorine atom. It is preferable that one of X ⁱ¹ , X ⁱ² , X ⁱ³ and X ⁱ⁴ is a hydrogen atom and the other three are fluorine atoms. X ⁱ¹ and X ⁱ² are independent of each other, and it is preferable that one of them is a hydrogen atom and the other is a fluorine atom, a chlorine atom, a trifluoromethyl group or a trifluoromethoxy group, and one of them is a hydrogen atom. It is preferable that the other is a fluorine atom or a trifluoromethoxy group, one of which is a hydrogen atom and the other is a fluorine atom. Each of ^Xi3 and ^Xi4 is preferably a fluorine atom, a chlorine atom, a trifluoromethyl group or a trifluoromethoxy group, preferably a fluorine atom or a trifluoromethoxy group, and is a fluorine atom. It is preferable that X ⁱ¹ , X ⁱ³ and X ⁱ⁴ are fluorine atoms and X ⁱ 2 is a hydrogen atom.

The compound represented by the general formula (i) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, and when the _solubility at low temperature is emphasized, the content is set high, and the effect is high when the number of types to be combined is increased. If it is important, setting a low content will be more effective. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle. Further, low voltage drive is possible by increasing Δε, but in the liquid crystal composition of the present invention, low voltage and high speed response can be achieved by using the compound of the compound of the general formula (i) alone or in combination. A liquid crystal display element can be obtained.

The lower limit of the preferable content of the compound represented by the formula (i) with respect to the total amount of the composition of the present invention is 3%, 5% and 7%. The upper limit of the preferable content is 23%, 20%, 18%, 15%, 13%, 11%, and 9% with respect to the total amount of the composition of the present invention. %.

Further, the compound represented by the general formula (i) is preferably a compound selected from the compound group represented by the general formulas (i-1) to (i-4), and the general formula (i-1). And the compound represented by (i-3) is preferable, and the compound represented by the general formula (i-1) is preferable.

(In the formula, R ⁱ¹ and R ^{i2 have the same meaning as R i1 and R i2 in the} general formula (i).)
The lower limit of the preferable content of the compound represented by the formula (i-1) with respect to the total amount of the composition of the present invention is 3%, 5% and 7%. The upper limit of the preferable content is 23%, 20%, 18%, 15%, 13%, 11%, and 9% with respect to the total amount of the composition of the present invention. %.

The lower limit of the preferable content of the compound represented by the formula (i-3) with respect to the total amount of the composition of the present invention is 3%, 5% and 7%. The upper limit of the preferable content is 23%, 20%, 18%, 15%, 13%, 11%, and 9% with respect to the total amount of the composition of the present invention. %.

Further, the compound represented by the general formula (i-1) is preferably a compound represented by the general formulas (i-1.1) to (i-1.12), and the compound represented by the general formula (i-1.4) is preferable. , (I-1.6), (i-1.9) and (i-1.10) are preferable, and the general formulas (i-1.4) and (i-1.10) are used. The compound represented is preferred.

The lower limit of the preferable content of the compound represented by the formula (i-1.4) with respect to the total amount of the composition of the present invention is 3%, 5% and 7%. The upper limit of the preferable content is 23%, 20%, 18%, 15%, 13%, 11%, and 9% with respect to the total amount of the composition of the present invention. %.

The lower limit of the preferable content of the compound represented by the formula (i-1.10) with respect to the total amount of the composition of the present invention is 3%, 5% and 7%. The upper limit of the preferable content is 23%, 20%, 18%, 15%, 13%, 11%, and 9% with respect to the total amount of the composition of the present invention. %.

The composition of the present invention preferably contains one or more compounds selected from the compounds represented by the general formulas (N-1), (N-2) and (N-3). These compounds are dielectrically negative compounds (the sign of Δε is negative and its absolute value is larger than 2).

(In the formula, ^RN11 , ^RN12 , ^RN21 , ^RN22 , ^RN31 and ^RN32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two non-adjacent ones. More than one -CH _2- may be independently substituted with -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
^{AN11, AN12, AN21, AN22, AN31 and AN32 are independently ( a )} 1,4-cyclohexylene groups (one -CH _2- or adjacent to each other present in this group). No two or more -CH _2- may be replaced with -O-) and (b) 1,4-phenylene group (one -CH = or non-adjacent 2 present in this group). More than one -CH = may be replaced with -N =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
(D) Represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the above groups (a), group (b), group (c) and group (d) are independently cyano groups, respectively. It may be substituted with a fluorine atom or a chlorine atom,
Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 are independently single-bonded, -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-
X ^N21 represents a hydrogen atom or a fluorine atom.
^TN31 represents -CH _2- or an oxygen atom and represents
Although n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31 and n ^N32 each independently represent an integer of 0 to 3, n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 are independent of each other. When it is 1, 2 or 3, and there are a plurality of ^{AN11 to AN32 and Z N11 to Z N32 , they} may be the same or different. )
The compounds represented by the general formulas (N-1), (N-2) and (N-3) are preferably compounds having a negative Δε and an absolute value larger than 3.

In the general formulas (N-1), (N-2) and (N-3), ^RN11 , ^RN12 , ^RN21 , ^RN22 , ^RN31 and ^RN32 are independent of each other and have 1 to 8 carbon atoms. , An alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms or an alkenyloxy group having 2 to 8 carbon atoms is preferable, and an alkyl group having 1 to 5 carbon atoms and an number of carbon atoms are preferable. An alkoxy group of 1 to 5, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is preferable, and an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is preferable. More preferably, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is further preferable, and an alkenyl group (propenyl group) having 3 carbon atoms is particularly preferable.

When the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and carbon are used. An alkoxy group having 4 to 5 atoms is preferable, and when the ring structure to which the alkoxy group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms and a linear chain are used. Alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if any, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from the groups represented by any of the formulas (R1) to (R5). (The black dots in each equation represent carbon atoms in the ring structure.)

^{AN11, AN12, AN21, AN22, AN31 and AN32 are preferably aromatics when it} is required to increase Δn independently, and fat is used to improve the response rate. It is preferably a group, preferably a trans-1,4-cyclohexylene group, a 1,4-phenylene group, a 2-fluoro-1,4-phenylene group, a 3-fluoro-1,4-phenylene group, 3,5. -Difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1 , 4-Diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, preferably represented below. It is more preferable to represent the structure of

It is more preferable to represent a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group.

Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 are independently -CH ₂ O-, -CF ₂ O-, -CH ₂ CH _2- , -CF ₂ CF _2- or single bond, respectively. , -CH ₂ O-, -CH ₂ CH _2- or single bond is more preferable, and -CH ₂ O- or single bond is particularly preferable.

Fluorine atom is preferable for X ^N21 .

Oxygen atom is preferable for ^TN31 .

n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 are preferably 1 or 2, n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 is 0, n ^N11 is 1 and n ^N12 is 1, n ^N11 is 2 and n ^N12 is 1, n ^N21 is 1 and n ^N22 is 0, n ^N21 is 2 and n ^N22 is. A combination of 0, a combination of n ^N31 of 1 and n ^N32 of 0, and a combination of n ^N31 of 2 and n ^N32 of 0 are preferred.

The lower limit of the preferable content of the compound represented by the formula (N-1) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, and 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%. Is.

The lower limit of the preferable total content of the compound represented by the general formula (i) and the compound represented by the formula (N-1) with respect to the total amount of the composition of the present invention is 1%, which is 10 %, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80. %. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%. Is.

The lower limit of the preferable content of the compound represented by the formula (N-2) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, and 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%. Is.

The lower limit of the preferable content of the compound represented by the formula (N-3) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, and 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%. Is.

When a composition having a low viscosity and a high response rate is required, it is preferable that the lower limit value is low and the upper limit value is low. Further, when a composition having a high Tni of the composition of the present invention and having good temperature stability is required, it is preferable that the lower limit value is low and the upper limit value is low. Further, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is high and the upper limit value is high.

Examples of the compound represented by the general formula (N-1) include a group of compounds represented by the following general formulas (N-1a) to (N-1g).

(In the formula, ^RN11 and ^RN12 have the same meaning as ^RN11 and ^RN12 in the general formula (N-1), ^nNa11 represents 0 or 1, ^nNb11 represents 1 or 2, and ^nNc11 represents. ^Represents 0 or 1, n Nd 11 represents 1 or 2, n Ne 11 represents 1 or 2, n ^Nf 11 represents 1 or 2, n ^{Ng 11} represents 1 or 2, and A ^{Ne 11} represents trans-1,4. -Represents a cyclohexylene group or a 1,4-phenylene group, and ^ANg11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, but at least one. Represents a 1,4-cyclohexenylene group, Z ^{Ne 11} represents a single bond or ethylene, but at least one represents ethylene, except for the compound represented by the general formula (i).)
More specifically, the compound represented by the general formula (N-1) may be a compound selected from the compound group represented by the general formulas (N-1-1) to (N-1-21). preferable.

The compound represented by the general formula (N-1-1) is the following compound.

(In the formula, ^RN111 and ^RN112 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N)).
^{The RN111} is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group or a vinyl group. ^{The RN112} is preferably 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 preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 %, 5%, and 3%.

Further, the compound represented by the general formula (N-1-1) is a compound selected from the compound group represented by the formulas (N1-1.1) to (N1-1.23). It is preferable that the compound is represented by the formulas (N-1-1.1) to (N-1-1.4), and the formulas (N-1-1.1) and the formula (N) are preferable. The compound represented by -1-1.3) is preferable.

The compounds represented by the formulas (N-1-1.1) to (N-1-1.22) can be used alone or in combination, but the composition of the present invention can be used. The lower limit of the preferred content of the single or these compounds relative to the total amount is 5%, 10%, 13%, 15%, 17%, 20%, 23%. 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 %, 5%, and 3%.

The compound represented by the general formula (N-1-2) is the following compound.

(In the formula, ^RN121 and ^RN122 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N)).
The ^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group or a pentyl group. The ^RN122 is preferably 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 a methyl group, a propyl group, a methoxy group, an ethoxy group or a propoxy group. preferable.

The compound represented by the general formula (N-1-2) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set low, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) with respect to the total amount of the composition of the present invention is 5%, 7%, 10%, and 13%. 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37%. It is 40% and 42%. The upper limit of the preferable content is 50%, 48%, 45%, 43%, 40%, 38%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10 %, 8%, 7%, 6%, and 5%.

Further, the compound represented by the general formula (N-1-2) is a compound selected from the compound group represented by the formula (N-1-2.1) to the formula (N-1-2.22). It is preferable that there are formulas (N-1-2.3) to formulas (N-1-2.7), formulas (N1-2.10), formulas (N-1-2.11), and formulas. It is preferable that the compound is represented by (N-1-2.13) and the formula (N-1-2.20), and when the improvement of Δε is emphasized, the formula (N-1-2.3) is used. From the above, the compound represented by the formula (N- _1-2.7 ) is preferable, and when the improvement of TNI is emphasized, the formula (N1-2.10) and the formula (N-1-2.11) are used. And the compound represented by the formula (N-1-2.13) is preferable, and the compound represented by the formula (N-1-2.20) is used when the improvement of the response speed is emphasized. Is preferable.

The compounds represented by the formulas (N-1-2.1) to (N-1-2.22) can be used alone or in combination, but the composition of the present invention. The lower limit of the preferred content of these compounds alone or of these compounds relative to the total amount of is 5%, 10%, 13%, 15%, 17%, 20%, 23. %, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 %, 5%, and 3%.

The compound represented by the general formula (N-1-3) is the following compound.

(In the formula, ^RN131 and ^RN132 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N)).
^{The RN131} is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^{The RN132} is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and preferably a 1-propenyl group, an ethoxy group, a propoxy group or a butoxy group. ..

The compound represented by the general formula (N-1-3) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-3) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1--3) is a compound selected from the compound group represented by the formula (N-1-3.21) to the formula (N-1-3.21). It is preferable that the compound is represented by the formulas (N-1-3.1) to (N-1-3.7) and the formula (N-1-3.21), and is preferably the compound represented by the formula (N-1-3.21). -1-3.1), Eq. (N-1-3.2), Eq. (N-1-3.3), Eq. (N-1-3.4) and Eq. (N-1-3.6) ) Is preferred.

The compounds represented by the formulas (N-1-3.1) to (N-1-3.4), the formula (N-1-3.6) and the formula (N-1-3.21) are independent. Although it can be used in the above or in combination, the combination of the formula (N-1-3.1) and the formula (N-1-3.2) and the formula (N-1-3.3) can be used. ), A combination of 2 or 3 selected from the formula (N-1-3.4) and the formula (N-1-3.6) is preferable. The lower limit of the preferred content of the composition alone or of these compounds relative to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20. %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-4) is the following compound.

(In the formula, ^RN141 and ^RN142 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N)).
^RN141 and ^RN142 are independent of each other, preferably 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, preferably a methyl group, a propyl group, and an ethoxy group. Groups or butoxy groups are preferred.

The compound represented by the general formula (N-1-4) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) with respect to the total amount of the composition of the present invention is 3%, 5%, 7% and 10%. It is 13%, it is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, 8%.

Further, the compound represented by the general formula (N-1-4) is a compound selected from the compound group represented by the formulas (N-1-4.1) to (N-1-4.14). It is preferable that the compound is represented by the formulas (N-1-4.1) to (N-1-4.4), and the formula (N-1-4.1) and the formula (N) are preferable. The compounds represented by 1-4.4.2) and the formula (N-1-4.4) are preferable.

The compounds represented by the formulas (N-1-4.1) to (N-1-4.14) can be used alone or in combination, but the composition of the present invention can be used. The lower limit of the preferred content of these compounds alone or these compounds relative to the total amount is 3%, 5%, 7%, 10%, 13%, 15%, 17%. It is 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, 8%.

The compound represented by the general formula (N-1-5) is the following compound.

(In the formula, ^RN151 and ^RN152 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N)).
^RN151 and ^RN152 are each independently 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, preferably an ethyl group, a propyl group, or a butyl group. Is preferable.

The compound represented by the general formula (N-1-5) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set low, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, and 13%. It is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15%, and 13%.

Further, the compound represented by the general formula (N-1-5) is a compound selected from the compound group represented by the formulas (N-1-5.1) to (N-1-5.6). It is preferable that the compound is represented by the formula (N-1-5.1), the formula (N-1-5.2) and the formula (N-1-5.4).

The compounds represented by the formulas (N-1-5.1), (N-1-5.2) and (N-1-5.4) may be used alone or in combination. However, the lower limit of the preferable content of the composition alone or these compounds with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, 13%, and the like. It is 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15%, and 13%.

The compound represented by the general formula (N-1-10) is the following compound.

(In the formula, ^RN1101 and ^RN1102 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
The ^RN1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. The ^RN1102 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-10) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-10) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-10) is a compound selected from the compound group represented by the formula (N-1-10.1) to the formula (N-1-10.21). It is preferably present, and is represented by the formulas (N-1-10.1) to (N-1-10.5) formulas (N-110.20) and formulas (N-1-10.21). It is preferably a compound, preferably of the formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20) and formula (N-1-10.21). The compound represented by is preferable.

Compounds represented by the formulas (N-1-10.1), formula (N-1-10.2), formulas (N-110.20) and formulas (N-1-10.21) are used alone. Although it can be used in combination or in combination, the lower limit of the preferable content of these compounds alone or in combination with respect to the total amount of the composition of the present invention is 5% and 10%. , 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-11) is the following compound.

(In the formula, ^RN1111 and ^RN1112 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^{The RN1111} is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1112 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-11) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set low, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-11) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-111) is a compound selected from the compound group represented by the formulas (N-1-11.1) to (N-1-1.15). It is preferable that the compound is represented by the formulas (N-1-11.1) to (N-1-1.15), and the formulas (N-1-11.2 and N-) are preferable. The compound represented by 1-11.4) is preferable.

The compounds represented by the formulas (N-1-11.2) and (N-1-11.4) can be used alone or in combination, but the composition of the present invention can be used. The lower limit of the preferred content of a single substance or these compounds with respect to the total amount of is 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-12) is the following compound.

(In the formula, ^RN1121 and ^RN1122 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1122 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-12) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-13) is the following compound.

(In the formula, ^RN1131 and ^RN1132 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1132 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-13) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-14) is the following compound.

(In the formula, ^RN1141 and ^RN1142 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1142 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-14) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-15) is the following compound.

(In the formula, ^RN1151 and ^RN1152 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^{The RN1152} is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-15) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-16) is the following compound.

(In the formula, ^RN1161 and ^RN1162 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^{The RN1162} is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-16) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-17) is the following compound.

(In the formula, ^RN1171 and ^RN1172 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1172 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-17) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-18) is the following compound.

(In the formula, ^RN1181 and ^RN1182 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN1182 is preferably 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-18) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-18) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-18) is a compound selected from the compound group represented by the formulas (N1-18.1) to (N1-18.5). It is preferable that the compound is represented by the formulas (N1-18.1) to (N1-11.3), and the formulas (N1-18.2) and the formula (N-) are preferable. The compound represented by 1-18.3) is preferable.

The compound represented by the general formula (N-1-20) is the following compound.

(In the formula, ^RN1201 and ^RN1202 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1201 and ^RN1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-20) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-21) is the following compound.

(In the formula, ^RN1211 and ^RN1212 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^RN1211 and ^RN1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-21) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-2-1) with respect to the total amount of the composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-22) is the following compound.

(In the formula, ^RN1221 and ^RN1222 have the same meanings as ^RN11 and ^RN12 in the general formula (N), respectively.)
^RN1221 and ^RN1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-22) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when set to a high value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-2-1) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 13%. It is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 10%, 5%.

Further, the compound represented by the general formula (N-1-22) is a compound selected from the compound group represented by the formulas (N-1-22.1) to (N-1-222.12). It is preferable that the compound is represented by the formulas (N-1-22.1) to (N-1-22.5), and the compounds are preferably represented by the formulas (N-1-22.1) to (N-). The compound represented by 1-22.4) is preferable.

The compound represented by the general formula (N-3) is preferably a compound selected from the compound group represented by the general formula (N-3-2).

(In the formula, ^RN321 and ^RN322 independently represent the same meanings as ^RN11 and ^RN12 in the general formula (N).)
^{The RN321} and ^RN322 are preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group or a pentyl group.

The compound represented by the general formula (N-3-2) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set high, and when the _TNI is emphasized, the content is high. The effect is high when is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-3-2) with respect to the total amount of the composition of the present invention is 3%, 5%, 10% and 13%. , 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 % And 5%.

Further, the compound represented by the general formula (N-3-2) is a compound selected from the compound group represented by the formula (N-3-2.1) to the formula (N-3-2.3). It is preferable to have.

The liquid crystal composition of the present invention preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a dielectrically almost neutral compound (value of Δε is -2 to 2).

(In the formula, ^RL1 and ^RL2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent _−CH2- in the alkyl group are independent of each other. It may be substituted with -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
n ^L1 represents 0, 1, 2 or 3
A ^L1 , A ^L2 and A ^L3 are independently (a) 1,4-cyclohexylene groups (one -CH _2- existing in this group or _two or more non-adjacent-CH 2--). May be replaced with -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = -N May be replaced with =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) may be independently substituted with cyano groups, fluorine atoms or chlorine atoms, respectively.
Z ^L1 and Z ^L2 are independently single-bonded, -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-
If n ^L1 is 2 or 3 and there are a plurality of A ^L2s , they may be the same or different, and if n ^L1 is 2 or 3 and there are a plurality of Z ^L3s , they may be the same or different. May be the same or different, except for the compounds represented by the general formulas (N-1), (N-2) and (N-3). )
The compound represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to desired performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of compound used is, for example, one type as one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, and ten. More than a kind.

In the composition of the present invention, the content of the compound represented by the general formula (L) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, seizure, and the like. It is necessary to make appropriate adjustments according to the required performance such as dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40. %, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, and 25%.

When a composition having a low viscosity and a high response rate is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when a composition having a high Tni of the composition of the present invention and 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, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is low and the upper limit value is low.

Both ^RL1 and ^RL2 are preferably alkyl groups when reliability is important, and alkoxy groups are preferable when reducing the volatility of the compound is important, and reduction of viscosity is important. If so, it is preferable that at least one of them is an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and preferably 1 when compatibility with other liquid crystal molecules is important.

^RL1 and ^RL2 are linear alkyl groups having 1 to 5 carbon atoms and linear carbon atoms 1 to 4 when the ring structure to which they are bonded is a phenyl group (aromatic). The alkoxy group and the alkenyl group having 4 to 5 carbon atoms are preferable, and when the ring structure to which the alkoxy group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, the linear carbon atom number is 1 to 5. Alkoxy groups, linear alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if any, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from the groups represented by any of the formulas (R1) to (R5). (The black dots in each equation represent carbon atoms in the ring structure.)

n ^L1 is preferably 0 when the response speed is important, 2 or 3 is preferable for improving the upper limit temperature of the nematic phase, and 1 is preferable for balancing these. Further, in order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

^AL1 , ^AL2 and ^AL3 are preferably aromatic when it is required to increase Δn, and preferably aliphatic in order to improve the response rate, and each of them is independently trans-trans. 1,4-Cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group , 1,4-Cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6 -It is preferable to represent a diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and it is more preferable to represent the following structure.

It is more preferable to represent a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

Z ^L1 and Z ^L2 are preferably single bonds when response speed is important.

The compound represented by the general formula (L) preferably has 0 or 1 halogen atom in the molecule.

The compound represented by the general formula (L) is preferably a compound selected from the compound group represented by the general formulas (L-1) to (L-7).

The compound represented by the general formula (L-1) is the following compound.

(In the formula, RL11 and ^RL12 independently represent the same meanings as ^RL1 and ^RL2 in the general formula ( ^L )).
As ^{RL11 and RL12 ,} a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms are preferable. ..

The compound represented by the general formula (L-1) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

The lower limit of the preferred content is 1%, 2%, 3%, 5%, 7%, 10%, 15 with respect to the total amount of the composition of the present invention. %, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%. The preferred upper limit of the content is 95%, 90%, 85%, 80%, 75%, 70%, 65% with respect to the total amount of the composition of the present invention. %, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%.

When a composition having a low viscosity and a high response rate is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when a composition having a high Tni of the composition of the present invention and having good temperature stability is required, it is preferable that the lower limit value is moderate and the upper limit value is moderate. Further, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is low and the upper limit value is low.

The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-1).

(In the formula, ^RL12 has the same meaning as in the general formula (L-1).)
The compound represented by the general formula (L-1-1) shall be a compound selected from the compound group represented by the formulas (L-1-1.1) to (L-1-1.3). Is preferable, and it is preferable that it is a compound represented by the formula (L-1-1.2) or the formula (L-1-1.3), and in particular, it is represented by the formula (L-1-1.3). It is preferably a compound.

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the composition of the present invention is 1%, 2% and 3%. It is 5%, 7%, and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, and 3%.

The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-2).

(In the formula, ^RL12 has the same meaning as in the general formula (L-1).)
The lower limit of the preferable content of the compound represented by the formula (L-1-2) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 15%. It is 17%, 20%, 23%, 25%, 27%, 30%, and 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

Further, the compound represented by the general formula (L-1-2) is a compound selected from the compound group represented by the formula (L-1-2.1) to the formula (L-1-2.4). It is preferable that the compound is represented by the formulas (L-1-2.2) to (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because it particularly improves the response rate of the composition of the present invention. Further, when obtaining Tni higher than the response speed, it is preferable to use a compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). The content of the compounds represented by the formulas (L-1-2.3) and (L-1-2.4) is not preferably 30% or more in order to improve the solubility at a low temperature.

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention is 10%, 15% and 18%. It is 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, 22%.

The lower limit of the total preferable content of the compound represented by the formula (L-1-1.3) and the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention. The values are 10%, 15%, 20%, 25%, 27%, 30%, 35%, and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, 22%.

The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-3).

(In the formula, ^RL13 and ^RL14 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
^{As RL13} and ^RL14 , a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms are preferable. ..

The lower limit of the preferable content of the compound represented by the formula (L-1-3) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 13%. , 15%, 17%, 20%, 23%, 25%, and 30%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, 37%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%. %.
Further, the compound represented by the general formula (L-1-3) is a compound selected from the compound group represented by the formulas (L-1-3.1) to (L-1-3.12). It is preferable that the compound is represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response rate of the composition of the present invention. Further, when obtaining Tni higher than the response speed, the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and the formula (L-) are obtained. It is preferable to use the compound represented by 1-3.12). Total of compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12). The content of the above is not preferably 20% or more in order to improve the solubility at low temperature.

The lower limit of the preferable content of the compound represented by the formula (L-1-3.1) with respect to the total amount of the composition of the present invention is 1%, 2% and 3%. It is 5%, 7%, 10%, 13%, 15%, 18%, and 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-4) and / or (L-1-5).

(In the formula, ^RL15 and ^RL16 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
^RL15 and ^RL16 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. ..

The lower limit of the preferable content of the compound represented by the formula (L-1-4) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, and 13%. It is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

The lower limit of the preferable content of the compound represented by the formula (L-1-5) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 13%. It is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

Further, the compounds represented by the general formulas (L-1-4) and (L-1-5) are represented by formulas (L-1-4.1) to (L-1-5.3). It is preferable that the compound is selected from the above-mentioned compound group, and it is preferable that the compound is represented by the formula (L-1-4.2) or the formula (L-1-5.2).

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) with respect to the total amount of the composition of the present invention is 1%, 2% and 3%. It is 5%, 7%, 10%, 13%, 15%, 18%, and 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

Equation (L-1-1.3), Equation (L-1-2.2), Equation (L-1-3.1), Equation (L-1-3.3), Equation (L-1- It is preferable to combine two or more compounds selected from the compounds represented by 3.4), the formula (L-1-3.11) and the formula (L-1-3.12), and the formula (L-1). -1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and It is preferable to combine two or more compounds selected from the compounds represented by the formula (L-1-4.2), and the lower limit of the preferable content of the total content of these compounds is the composition of the present invention. 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, and 18%. , 20%, 23%, 25%, 27%, 30%, 33%, 35%, and the upper limit is relative to the total amount of the composition of the present invention. , 80%, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%. , 28%, 25%, 23%, 20%. When the reliability of the composition is emphasized, the compounds represented by the formulas (L-1-3.1), (L-1-3.3) and (L-1-3.4)) are used. It is preferable to combine two or more compounds selected from the above, and when the response speed of the composition is important, it is represented by the formulas (L-1-1.3) and (L-1-2.2). It is preferable to combine two or more kinds of compounds selected from the above compounds.
The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-6).

(In the formula, ^RL17 and ^RL18 independently represent a methyl group or a hydrogen atom, respectively.)
The lower limit of the preferable content of the compound represented by the formula (L-1-6) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 15%. It is 17%, 20%, 23%, 25%, 27%, 30%, and 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

Further, the compound represented by the general formula (L-1-6) is a compound selected from the compound group represented by the formulas (L-1-6.1) to (L-1-6.3). It is preferable to have.

The compound represented by the general formula (L-2) is the following compound.

(In the formula, ^RL21 and ^RL22 independently represent the same meanings as ^RL1 and RL2 in the general formula ( ^L )).
^RL21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL22 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferred.

The compound represented by the general formula (L-1) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the solubility at low temperature is emphasized, the effect is high when the content is set high, and conversely, when the response speed is emphasized, the effect is high when the content is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7% and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, and 3%.

Further, the compound represented by the general formula (L-2) is preferably a compound selected from the compound group represented by the formula (L-2.1) to the formula (L-2.6), preferably the formula. It is preferably a compound represented by (L-2.1), formula (L-2.3), formula (L-2.4) and formula (L-2.6).

The compound represented by the general formula (L-3) is the following compound.

(In the formula, ^RL31 and ^RL32 independently represent the same meanings as ^RL1 and RL2 in the general formula ( ^L )).
^{As RL31} and ^RL32 , 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 are preferable, respectively.

The compound represented by the general formula (L-3) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7% and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, and 3%.

When a high birefringence index is obtained, the effect is high when the content is set high, and conversely, when high Tni is emphasized, the effect is high when the content is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

Further, the compound represented by the general formula (L-3) is preferably a compound selected from the compound group represented by the formulas (L-3.1) to (L-3.4), preferably the formula. It is preferable that the compound is represented by the formula (L-3.7) from (L-3.2).

The compound represented by the general formula (L-4) is the following compound.

(In the formula, ^RL41 and ^RL42 independently represent the same meanings as ^RL1 and RL2 in the general formula ( ^L )).
^RL41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferred. )
The compound represented by the general formula (L-4) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. .. The upper limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formulas (L-4.1) to (L-4.3), for example.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.1) is contained, the formula (L) is contained. Even if it contains the compound represented by 4.2), it contains both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2). It may contain all the compounds represented by the formulas (L-4.1) to (L-4.3). The lower limit of the preferable content of the compound represented by the formula (L-4.1) or the formula (L-4.2) with respect to the total amount of the composition of the present invention is 3%, which is 5%. Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and the preferred upper limit is 45, 40%. , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%. ..

When both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2) are contained, both compounds are used with respect to the total amount of the composition of the present invention. The lower limit of the preferred content is 15%, 19%, 24% and 30%, and the preferred upper limit is 45, 40%, 35% and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formulas (L-4.4) to (L-4.6), for example, preferably the compound represented by the formula (L-4.4). ) Is preferable.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.4) is contained, the formula (L) is contained. Even if it contains the compound represented by -4.5), it contains both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5). You may be.

The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the composition of the present invention is 3%, which is 5%. Yes, 7%, 9%, 11%, 12%, 13%, 18%, and 21%. Preferred upper limits are 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13 %, 10%, and 8%.

When both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, both compounds are used with respect to the total amount of the composition of the present invention. The lower limit of the preferred content is 15%, 19%, 24% and 30%, and the preferred upper limit is 45, 40%, 35% and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formulas (L-4.7) to (L-4.10), and in particular, the compound represented by the formula (L-4. The compound represented by 9) is preferable.

The compound represented by the general formula (L-5) is the following compound.

(In the formula, ^RL51 and ^RL52 independently represent the same meanings as ^RL1 and RL2 in the general formula ( ^L )).
^RL51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL52 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferred.

The compound represented by the general formula (L-5) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. .. The upper limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5% The compound represented by the general formula (L-5) is the formula (L-5.1) or the formula (L-5.2). ) Is preferable, and a compound represented by the formula (L-5.1) is particularly preferable.

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.3) or the formula (L-5.4).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is preferably a compound selected from the compound group represented by the formulas (L-5.5) to (L-5.7), and particularly the compound represented by the formula (L-5). It is preferably a compound represented by L-5.7).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-6) is the following compound.

(In the formula, ^RL61 and ^RL62 independently represent the same meanings as ^{RL1 and RL2 in the general formula (L), and XL61 and XL62 independently} represent a hydrogen atom or a fluorine atom, respectively. )
^RL61 and ^RL62 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one of ^XL61 and ^XL62 is a fluorine atom and the other is a hydrogen atom. Is preferable.

The compound represented by the general formula (L-6) may be used alone, or may be used in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. .. The upper limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5%. When the emphasis is on increasing Δn, it is preferable to increase the content, and when the emphasis is on precipitation at a low temperature, it is preferable that the content is small.

The compound represented by the general formula (L-6) is preferably a compound represented by the formulas (L-6.1) to (L-6.9).

The types of compounds that can be combined are not particularly limited, but it is preferable to contain 1 to 3 types of these compounds, and even more preferably 1 to 4 types. Further, since the wide molecular weight distribution of the selected compound is also effective for solubility, for example, one kind from the compound represented by the formula (L-6.1) or (L-6.2), the formula (L-). One type from the compound represented by 6.4) or (L-6.5), one type from the compound represented by the formula (L-6.6) or the formula (L-6.7), the formula (L). It is preferable to select one kind of compound from the compounds represented by −6.8) or (L-6.9) and combine them appropriately. Among them, it is represented by the formula (L-6.1), the formula (L-6.3), the formula (L-6.4), the formula (L-6.6) and the formula (L-6.9). It preferably contains a compound.

Further, the compound represented by the general formula (L-6) is preferably a compound represented by the formulas (L-6.10) to (L-6.17), and among them, the compound represented by the formula (L-6.17) is preferable. It is preferably a compound represented by L-6.11).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-7) is the following compound.

(In the formula, ^RL71 and ^RL72 independently represent the same meanings as RL1 and RL2 in the general formula ( ^L ), and ^AL71 and ^AL72 independently represent ^AL2 and LL2 in the general formula ( ^L ), respectively. Although it has the same meaning as A ^L3 , the hydrogen atom on A ^L71 and A ^L72 may be independently substituted with a fluorine atom, and Z ^L71 has the same meaning as Z ^L2 in the general formula (L). ^XL71 and ^XL72 independently represent a fluorine atom or a hydrogen atom, respectively.)
In the formula, ^RL71 and ^RL72 are each independently preferably 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 ^AL71 and ^AL72 are preferable. Is preferably a 1,4-cyclohexylene group or a 1,4-phenylene group independently, and hydrogen atoms on ^AL71 and ^AL72 may be independently substituted with fluorine atoms, and Z ^L71 is simply. A bond or COO- is preferable, a single bond is preferable, and a hydrogen atom is preferable for ^XL71 and ^XL72 .

The types of compounds that can be combined are not particularly limited, but they are combined according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one, two, three, and four as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%. The upper limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 30%, 25%, 23%, and 20%. , 18%, 15%, 10%, 5%.

When an embodiment of Tni having a high composition of the present invention is desired, it is preferable to increase the content of the compound represented by the formula (L-7), and when an embodiment having a low viscosity is desired, the content is high. It is preferable to lower the value.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.1) to (L-7.4), and the compound represented by the formula (L-7. It is preferably a compound represented by 2).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.11) to (L-7.13), and the compound represented by the formula (L-7. It is preferably a compound represented by 11).

Further, the compound represented by the general formula (L-7) is a compound represented by the formulas (L-7.21) to (L-7.23). It is preferably a compound represented by the formula (L-7.21).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.31) to (L-7.34), and the compound represented by the formula (L-7. 31) or / and a compound represented by the formula (L-7.32) are preferable.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.41) to (L-7.44), preferably the compound represented by the formula (L-7. 41) or / and a compound represented by the formula (L-7.42) are preferable.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.51) to (L-7.53).

The lower limit of the preferable content of the total of the compounds represented by the general formulas (i), (L) and (N) with respect to the total amount of the composition of the present invention is 80%, which is 85%. Yes, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%. Yes, it is 100%. The upper limit of the preferred content is 100%, 99%, 98% and 95%.

The total amount of the compounds represented by the general formulas (i), (L-1) to (L-7) and (M-1) to (M-8) with respect to the total amount of the composition of the present invention. The lower limit of the preferred content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%. It is 97%, 98%, 99%, and 100%. The upper limit of the preferred content is 100%, 99%, 98% and 95%.

The lower limit of the preferable total content of the compounds represented by the general formulas (i), (L-3) and (N-1-4) is 10%, 13% and 15%. It is 18% and 20%. The upper limit of the preferred content is 37%, 34%, 32%, 30%, 28% and 26%.

The total number of compounds represented by the general formulas (i), (L-3), (L-5), (N-1-3), (N-1-4) and (N-1-18) is preferable. The lower limit of the content is 25%, 30%, 33%, 35%, 38%, 40%, 43%, and 45%. The upper limit of the preferred content is 70%, 65%, 63%, 60%, 57%, 55%, and 53%.

The lower limit of the preferable total content of the compounds represented by the general formulas (i), (L-3) and (N-1-4) is 35%, 37% and 40%. It is 43%, 45%, 47%, 50%, and 53%. The upper limit of the preferred content is 70%, 65%, 63%, 60%, 58%, and 56%.

It is preferable that the composition of the present invention does not contain a compound having a structure in which oxygen atoms are bonded to each other, such as a peracid (-CO-OO-) structure, in the molecule.

When the reliability and long-term stability of the composition are emphasized, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, based on the total mass of the composition. It is preferably 1% or less, and most preferably not substantially contained.

When the stability by UV irradiation is emphasized, the content of the compound substituted with chlorine atom is preferably 15% or less, preferably 10% or less, and 8% with respect to the total mass of the composition. % Or less, more preferably 5% or less, more preferably 3% or less, and even more preferably substantially no content.

It is preferable to increase the content of the compound having all 6-membered ring structures in the molecule, and the content of the compound having all 6-membered ring structures in the molecule is 80 with respect to the total mass of the composition. % Or more, more preferably 90% or more, further preferably 95% or more, and the composition is composed only of a compound in which substantially all the ring structures in the molecule are 6-membered rings. Is most preferable.

In order to suppress deterioration of the composition due to oxidation, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group is added to the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and further preferably not substantially contained.

When the improvement of viscosity and the improvement of Tni are emphasized, the content of the compound having a 2-methylbenzene-1,4-diyl group in which the hydrogen atom may be substituted with halogen may be reduced. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, more preferably 3% or less, and further preferably not substantially contained.

In the present application, substantially not contained means that it is not contained except for an unintentionally contained substance.

When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, and the alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is 2 to 5. When the alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the alkenyl group and benzene are directly bonded. It is preferable that there is no such thing.

The average elastic constant ( _KAVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, but the lower limit thereof is preferably 10 is preferable, 10.5 is preferable, 11 is preferable, and 11.5 is preferable. , 12 is preferred, 12.3 is preferred, 12.5 is preferred, 12.8 is preferred, 13 is preferred, 13.3 is preferred, 13.5 is preferred, 13.8 is preferred, 14 is preferred, 14 3.3 is preferred, 14.5 is preferred, 14.8 is preferred, 15 is preferred, 15.3 is preferred, 15.5 is preferred, 15.8 is preferred, 16 is preferred, 16.3 is preferred, 16 .5 is preferable, 16.8 is preferable, 17, is preferable, 17.3 is preferable, 17.5 is preferable, 17.8 is preferable, 18 is preferable, and 25 is preferable and 24.5 is preferable as the upper limit value thereof. Is preferred, 24 is preferred, 23.5 is preferred, 23 is preferred, 22.8 is preferred, 22.5 is preferred, 22.3 is preferred, 22 is preferred, 21.8 is preferred, and 21.5 is preferred. 21.3 is preferable, 21 is preferable, 20.8 is preferable, 20.5 is preferable, 20.3 is preferable, 20 is preferable, 19.8 is preferable, 19.5 is preferable, and 19.3 is preferable. , 19 is preferred, 18.8 is preferred, 18.5 is preferred, 18.3 is preferred, 18 is preferred, 17.8 is preferred, 17.5 is preferred, 17.3 is preferred, and 17 is preferred. When reducing power consumption is important, it is effective to suppress the amount of light from the backlight, and it is preferable that the liquid crystal display element improves the light transmittance. For that purpose, it is necessary to set the _KAVG value low. preferable. When the improvement of the response speed is emphasized, it is preferable to set the _KAVG value higher.

The composition of the present invention can contain a polymerizable compound in order to produce a liquid crystal display element such as a PS mode, a transverse electric field type PSA mode, or a transverse electric field type PSVA mode. Examples of the polymerizable compound that can be used include a photopolymerizable monomer in which polymerization proceeds by an energy ray such as light, and as a structure, for example, it has a liquid crystal skeleton in which a plurality of six-membered rings such as a biphenyl derivative and a terphenyl derivative are linked. Examples include polymerizable compounds. More specifically, the general formula (XX)

(In the formula, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group.
Sp ²⁰¹ and Sp ²⁰² are independent, single bond, alkylene group having 1 to 8 carbon atoms or -O- (CH ₂ ) _s- (in the formula, s represents an integer from 2 to 7, and the oxygen atom is an oxygen atom. It is assumed that it binds to the aromatic ring.)) Is preferable.
Z ²⁰¹ is -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- (In the equation, Y ¹ and Y ² independently represent a fluorine atom or a hydrogen atom.), -C≡C- or a single bond.
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all 1,4-phenylene groups in the formula have arbitrary hydrogen atoms substituted with fluorine atoms. Is also good. ) Is preferred.

Both X ²⁰¹ and X ²⁰² are preferably a diacrylate derivative representing a hydrogen atom and a dimethacrylate derivative having a methyl group, and a compound in which one represents a hydrogen atom and the other represents a methyl group are also preferable. As for the polymerization rate of these compounds, the diacrylate derivative is the fastest, the dimethacrylate derivative is the slowest, and the asymmetric compound is in the middle, and a preferred embodiment can be used depending on the application. In the PSA display device, a dimethacrylate derivative is particularly preferable.

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 at least one of them is a single bond in a PSA display element. It is preferable that the compound represents a single bond together, or an alkylene group having a single bond and the other representing an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s— . In this case, 1 to 4 alkyl groups are preferable, and s is preferably 1 to 4.

Z ²⁰¹ is -OCH _2- , -CH ₂ O-, -COO-, -OCO-, -CF ₂ O-, -OCF _2- , -CH ₂ CH _2- , -CF ₂ CF _2- or single bond. Is preferable, -COO-, -OCO- or a single bond is more preferable, and a single bond is particularly preferable.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted with a fluorine atom, wherein the 1,4-phenylene group or a single bond is used. preferable. When C represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond, and when M ²⁰¹ is a single bond, Z ²⁰¹ is preferably a single bond.

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

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed by two rings, it is preferable to represent the formulas (XXa-1) to (XXa-5) as follows. It is more preferable to express the formula (XXa-3) from (XXa-1), and it is particularly preferable to represent the formula (XXa-1).

(In the formula, both ends shall be bonded to Sp ²⁰¹ or Sp ^202. )
Since the polymerizable compound containing these skeletons has the optimum orientation regulating force after polymerization for the PSA type liquid crystal display element and a good orientation state can be obtained, display unevenness is suppressed or does not occur at all.

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

(In the formula, benzene may be substituted with a fluorine atom, and Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.)
When the monomer is added to the composition of the present invention, the polymerization proceeds even in the absence of the polymerization initiator, but the polymerization initiator may be contained in order to promote the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides and the like.

The composition in the present invention can further contain a compound represented by the general formula (Q).

(In the formula, ^RQ represents a linear alkyl group or a branched chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are not directly adjacent to oxygen atoms. May be replaced with -O-, -CH = CH-, -CO-, ^-OCO- , -COO-, -C≡C-, -CF ₂ O-, -OCF _2- , and MQ is a transformer. -1,4-Cyclohexylene group, 1,4-phenylene group or single bond.)
^RQ represents a linear alkyl group or a branched chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are -O so that oxygen atoms are not directly adjacent to each other. -, -CH = CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF _2- May be substituted, but the number of carbon atoms is 1 to 10. Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted with -OCO- or -COO-, branched chain alkyl group, branched alkoxy group, one CH ₂ group is -OCO- Alternatively, a branched chain alkyl group substituted with -COO- is preferable, a linear alkyl group having 1 to 20 carbon atoms, and a linear alkyl group in which one CH ₂ group is substituted with -OCO- or -COO-, or branched. A chain alkyl group, a branched alkoxy group, and a branched chain alkyl group in which one CH ₂ group is substituted with -OCO- or -COO- are further preferable. ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, with a trans-1,4-cyclohexylene group or a 1,4-phenylene group being preferred.

More specifically, the compound represented by the general formula (Q) is preferably a compound represented by the following general formulas (Qa) to (Qd).

In the formula, ^RQ1 is preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms, ^RQ2 is preferably a linear alkyl group or a branched alkyl group having 1 to 20 carbon atoms, and ^RQ3 is A linear alkyl group having 1 to 8 carbon atoms, a branched chain alkyl group, a linear alkoxy group or a branched chain alkoxy group is preferable, and ^LQ is preferably a linear alkylene group or a branched chain alkylene group having 1 to 8 carbon atoms. .. Among the compounds represented by the general formulas (Qa) to (Qd), the compounds represented by the general formulas (Qc) and the general formula (Qd) are more preferable.

The composition of the present invention preferably contains one or two compounds represented by the general formula (Q), more preferably one to five, and the content thereof is from 0.001. It is preferably 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

Further, as the antioxidant or the light stabilizer that can be used in the present invention, more specifically, the compounds represented by the following (III-1) to (III-38) are preferable.

(In the formula, n represents an integer from 0 to 20.)
The composition of the present invention preferably contains one or more compounds represented by the general formula (Q) or compounds selected from the general formulas (III-1) to (III-38). The content is more preferably 0.001 to 1%, further preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

The composition containing the polymerizable compound of the present invention is imparted with a liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by irradiation with ultraviolet rays, and the amount of transmitted light is controlled by utilizing the birefringence of the composition. Used for liquid crystal display elements.

The following abbreviations are used for the description of compounds in the examples. In addition, n represents a natural number.
(Side chain)
-N-C _n H _{2n + 1} Linear alkyl group with n carbon atoms n-C _n H _{2n + 1} -Linear alkyl group with n carbon atoms-On-OC _n H _{2n + 1} Linear alkyl group with n carbon atoms Alkoxy group _nO -Cn H _{2n + 1} O-Linear alkoxyl group with n carbon atoms-V-CH = CH ₂
V-CH ₂ = CH-
-V1-CH = CH-CH ₃
1V-CH ₃ -CH = CH-
-2V -CH ₂ -CH ₂ -CH = CH ₃
V2-CH ₂ = CH-CH ₂ -CH _2-
-2V1-CH ₂ -CH ₂ -CH = CH-CH ₃
1V2-CH ₃ -CH = CH-CH ₂ -CH ₂
(Connecting group)
_-N --Cn H _2n-
-NO- _-Cn H _2n -O-
-On--OC _n H _2n-
-COO--C (= O) -O-
-OCO--OC (= O)-
-CF2O--CF2 _- O-
-OCF2--O-CF _2-
(Ring structure)

In the examples, the measured characteristics are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (° C)
T _{→ n} : Transition temperature to nematic phase (° C)
Δn: Refractive index anisotropy at 25 ° C n _O : Normal light refractive index at 25 ° C Δε: Dielectric index anisotropy at 25 ° C ε _⊥ : Permittivity in the vertical direction of the molecule at 25 ° C γ ₁ : Rotational viscosity at 25 ° C (MPa ・ s)
Low temperature storage: About 0.5 g of the liquid crystal composition was taken, placed in a vial, and stored at a temperature of -25 ° C. As a result, if precipitation was confirmed after 1 week, it was NG, and if precipitation was not confirmed after 1 week, it was OK.
(Examples 1 and 2 and Comparative Example 1)

Comparative Example 1 is a composition in which Δn and the like are similar to those of Examples 1 and 2 except for the compound (3-Ph2Ph5-O2) represented by the general formula (i). Since it is necessary to adjust Δε when excluding the compound represented by the general formula (i), the contents of other compounds are changed. As a result, it was found that γ1 increased significantly. Further, regarding T _{→ n} , although it was the same as in Examples 1 and 2, low temperature storage was evaluated as NG.
(Examples 3 to 6)

The compositions of Examples 3 to 6 exhibited a nematic phase in a wide temperature range, kept Δn and Δε, reduced γ1, and were evaluated at a level where there was no problem in low temperature storage.

Claims (5)

General formula (i-1)

(During the ceremony,
R ⁱ¹ Represents an alkyl group having 1 to 8 carbon atoms.
R ⁱ² Represents an alkoxy group having 1 to 8 carbon atoms. )
A composition containing one or more compounds represented by the above.
Further general formula (N-1)

(During the ceremony,
R ^N11 And R ^N12 Each independently represents an alkyl group having 1 to 8 carbon atoms.
One or two or more non-adjacent -CHs in the alkyl group ₂ -May be independently substituted by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, respectively.
A ^N11 And A ^N12 Are independent of each other
(A) 1,4-Cyclohexylene group (one -CH present in this group) ₂ -Or two or more non-adjacent-CHs ₂ -May be replaced with -O-. )
(B) 1,4-Phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other may be replaced with -N =).
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of
The above group (a), group (b) and group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom, respectively.
Z ^N11 And Z ^N12 Are independently single-bonded-CH ₂ CH ₂ -,-(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ Represents O-, -CH = NN = CH-, -CH = CH-, -CF = CF- or -C≡C-
n ^N11 And n ^N12 Represents an integer from 0 to 3 independently,
n ^N11 + N ^N12 Are 1, 2 or 3 independently, respectively.
A ^N11 , A ^N12 , Z ^N11 , Z ^N12 If there are multiple, they may be the same or different,
Excludes compounds represented by the general formula (i). )
Contains one or more compounds represented by
As a compound represented by the general formula (N-1), the formula (N-1-11)

(During the ceremony,
R ^N1111 And R ^N1112 Are independent of each other, and R in the general formula (N-1) ^N11 And R ^N12 Represents the same meaning as. )
A composition containing the compound represented by (1) as an essential ingredient. The composition according to claim 1, further comprising one or more compounds selected from the compounds represented by the general formulas (N-2) and (N-3) .

(During the ceremony,
RN21 , ^RN22 , ^RN31 and ^RN32 each independently ^represent an alkyl group having 1 to 8 carbon atoms.
One or two or more non-adjacent -CH _2- in the alkyl group are independently -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO. May be replaced by-
AN21 , ^AN22 , ^AN31 and ^AN32 are independent ^of (a) 1,4-cyclohexylene group (one -CH _2- or two or more non-adjacent groups present in this group-. CH _2- may be replaced with -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = May be replaced with -N =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of
The above group (a), group (b) and group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom, respectively.
Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 are independently single-bonded -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-
X ^N21 represents a hydrogen atom or a fluorine atom.
^TN31 represents -CH _2- or an oxygen atom and represents
Although n ^N21 , n ^N22 , n ^N31 and n ^N32 each independently represent an integer of 0 to 3,
n ^N21 + n ^N22 and n ^N31 + n ^N32 are independently 1, 2 or 3, respectively.
^When there are a plurality of ^{AN21 to AN32 and Z N21} to Z ^{N32 ,} they may be the same or different . ) The composition according to claim 1 or 2, further comprising one or more compounds represented by the general formula (L).

(During the ceremony,
^RL1 and ^RL2 each independently represent an alkyl group having 1 to 8 carbon atoms.
One or two or more non-adjacent -CH _2- in the alkyl group are independently -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO. May be replaced by-
n ^L1 represents 0, 1, 2 or 3
A ^L1 , A ^L2 and A ^L3 are independently (a) 1,4-cyclohexylene groups (one -CH _2- existing in this group or _two or more non-adjacent-CH 2--). May be replaced with -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = -N May be replaced with =.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of
The above group (a), group (b) and group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom, respectively.
Z ^L1 and Z ^L2 are independently single-bonded, -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 n ^L1 is 2 or 3 and there are a plurality of A ^L2 , they may be the same or different.
When n ^L1 is 2 or 3 and there are a plurality of Z ^L3s , they may be the same or different.
The compounds represented by the general formula (i), the general formula (N-1), the general formula (N-2) and the general formula (N-3) are excluded. ) A liquid crystal display device using the composition according to any one of claims 1 to 3. A PSA element, a VA element, or an FFS element using the composition according to any one of claims 1 to 3.