JP6519834B2 - Liquid crystal element - Google Patents

Description

  The present invention relates to a liquid crystal element.

  The polymer dispersed liquid crystal display element (PD-LCD) is a liquid crystal element system in which a liquid crystal and a polymer are separated from each other in the element, and a polymer network of the polymer is formed. The PD-LCD does not require an optical film such as a polarizing plate because it is a display method that utilizes a contrast ratio between a transparent state and an opaque state. Therefore, there is an advantage that bright display can be realized as compared with a TN, STN, IPS or VA mode liquid crystal display device using a polarizing plate, and furthermore, the configuration of the device is simple. It is applied to applications and segment display applications such as watches. In addition, in order to realize high definition display, application to a projector application, a reflection type display application and the like in combination with an active drive display element has also been studied (Patent Documents 1 and 2).

  In recent years, liquid crystal displays of unprecedented design, such as transmissive displays and flexible displays, are being developed for practical use.

JP-A-5-119302 Unexamined-Japanese-Patent No. 2006-308883

  The main characteristics required for the next generation display include flexibility applicable to a flexible display, transparency applicable to a transmissive display, power saving, and the like.

  The present invention can ensure each of the above-mentioned characteristics and is not only in a non-transmissive state when no voltage is applied, but in a normal mode type which is in a transmissive state when a voltage is applied. Provided is a liquid crystal device applicable to a polymer dispersed liquid crystal device applicable to any of reverse mode type which is in a non-transmissive state when voltage is applied.

  The present inventors completed the present invention as a result of verifying the performance of a PD-LCD by combining a liquid crystal composition having positive dielectric anisotropy and various polymers. That is, the present invention comprises a phase separation liquid crystal layer containing a liquid crystal composition and an alignment polymer, a homogeneous alignment film, and an electrode, and the liquid crystal composition exhibits positive dielectric anisotropy and the alignment Polymers have the general formula (i)

( ^Wherein P ⁱ¹ represents a polymerizable functional group,
Sp ⁱ¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, and one or more of —CH ₂ — in the alkylene group is —O—, —CH so that oxygen atoms are not directly adjacent to each other. = CH-, -CO-, -C≡C-, -OCO- or -COO- may be substituted,
R ⁱ¹ is -Sp ⁱ¹ -P ⁱ¹ , a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 15 carbon atoms in which a hydrogen atom may be substituted by a halogen atom, a hydrogen atom is substituted by a halogen atom C1-15 alkoxy group which may be substituted, alkenyl group having 1 to 15 carbon atoms in which hydrogen atom may be substituted by halogen atom, or carbon atom number in which hydrogen atom may be substituted by halogen atom Represents 1 to 15 alkenyloxy groups,
A ⁱ¹ , A ⁱ² and A ⁱ³ are each independently
(A) trans-1,4-cyclohexylene group (one methylene group present in this group or two or more non-adjacent methylene groups may be replaced by -O- or -S-. ),
(B) phenylene group (one -CH = or two or more non-adjacent -CH = present in this group may be replaced by a nitrogen atom), and (c) cyclohexenylene group And a group selected from the group consisting of bicyclo (2.2.2) octylene group, piperidine group, naphthalene group, decahydronaphthalene group and tetrahydronaphthalene group,
One or more hydrogen atoms present in the groups (a), (b) and (c) are each independently a fluorine atom, a chlorine atom, or an alkyl having 1 to 8 carbon atoms. A group, a halogenated alkyl group having 1 to 8 carbon atoms, a halogenated alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or -Sp ⁱ¹ -P ⁱ¹ may be substituted ,
When a plurality of A ⁱ³ are present, A ⁱ³ may be identical to or different from each other,
Z ⁱ¹ and ^{Z i2} are each independently a single _{bond, -O -, - S -,} - OCH 2 -, - CH 2 O -, - CO -, - C 2 H 4 -, - COO -, - OCO ^{_{-, - OCOOCH 2 -, -}} CH 2 OCOO -, - CO-NR 11 -, - NR 11 -CO -, - SCH 2 -, - CH 2 S -, - CH = CH-COO -, - OOC-CH _{= CH -, - COOC 2 H} 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 H 4 COO -, - OCOCH 2 -, - CH 2 COO -, - CH = CH- _{, -CF = CH -, - CH} = CF -, - CF 2 -, - CF 2 O -, - OCF 2 -, - CF 2 CH 2 -, - CH 2 CF 2 -, - CF 2 CF 2 - or -C≡C- (wherein, R ⁱ¹ represents an alkyl group having 1 to 4 carbon atoms) is Z ^When two or more ⁱ² exist, each may be the same or different,
When there are a plurality of -Sp ⁱ¹ -P ⁱ¹ , they may be the same or different. )
Formed by ultraviolet curing of one or more of the polymerizable compounds having a mesogenic group represented by
The present invention provides a liquid crystal element in which mesogen groups in the alignment polymer are aligned in the direction of the alignment control force in the homogeneous alignment film.

  According to the present invention, it is possible to obtain an element that can be put to practical use in new applications and drive methods while making use of the merits of the conventional PD-LCD.

  For example, the brightness of the transmitted light from the backlight can be adjusted by combining the liquid crystal element of the present invention and a pair of polarizing plates arranged in crossed Nicols. That is, switching can be performed between black display and white display, and gradation display can be performed between these displays by adjusting the applied voltage. Various displays can be expressed by using the liquid crystal element of the present invention and an active drive display element, or by using the liquid crystal element of the present invention itself as an active drive, for a transparent type or a reflective type display device.

FIG. 6 schematically shows an example of the configuration of the liquid crystal display element of the present invention, in which no voltage is applied The figure which shows typically the state of voltage application in FIG. FIG. 6 schematically shows an example of the configuration of the liquid crystal display element of the present invention, in which no voltage is applied. The figure which shows typically the state of voltage application in FIG. The figure which showed FIG. 3 from the direction perpendicular to a transparent substrate The figure which showed FIG. 4 from the perpendicular | vertical direction with respect to the transparent substrate

(Liquid crystal composition)
The liquid crystal composition according to the present invention can be configured by arbitrarily combining the liquid crystal compound groups shown below. In the following, unless otherwise specified, the term “composition” simply refers to a liquid crystal composition.

  The composition preferably contains one or more compounds represented by general formula (J). These compounds correspond to dielectrically positive compounds (Δε is greater than 2).

(Wherein, R ^J1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are each independently -CH = CH-,- It may be substituted by C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^J1 represents 0, 1, 2, 3 or 4;
A ^J1 , A ^J2 and A ^J3 are each independently
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =) and (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 1,2 , And one or more non-adjacent -CH = present in the 3,4-tetrahydronaphthalene-2,6-diyl group may be replaced by -N =).
And a group selected from the group consisting of: one or two or more hydrogen atoms present in the groups (a), (b) and (c) above are each independently a cyano group, a fluorine It may be substituted by an atom, a chlorine atom, a methyl group, a trifluoromethyl group or a trifluoromethoxy group,
Z ^J1 and ^{Z J2} each independently represent a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O-, -COO-, -OCO- or -C≡C-
When n ^J1 is 2, 3 or 4 and there are a plurality of A ^J2 , they may be the same or different, and n ^J1 is 2, 3 or 4 and a plurality of Z ^J1 is present If they are identical or different,
X ^J1 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group. )
In the general formula (J), R ^J1 represents an alkyl group having 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 having 2 to 8 carbon atoms Group is preferable, and an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is preferable. An alkyl group of 1 to 5 or an alkenyl group of 2 to 5 carbon atoms is more preferable, an alkyl group of 2 to 5 carbon atoms or an alkenyl group of 2 to 3 carbon atoms is further preferable, and an alkenyl group of 3 carbon atoms (Propenyl group) is particularly preferred.

When importance is attached to reliability, R ^J1 is preferably an alkyl group, and when importance is attached to decrease in viscosity, it is preferably an alkenyl group.

  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 Alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain Preferred is an alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, preferably linear.

  The alkenyl group is preferably selected from the groups represented by any one of formulas (R1) to (R5). (The black dot in each formula represents a carbon atom in a ring structure to which an alkenyl group is bonded.)

A ^J1 , A ^J2 and A ^J3 are each preferably aromatic when it is required to increase Δn independently, and in order to improve the response speed, it is preferably aliphatic, and trans- 1,4-cyclohexylene group, 1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene It is preferable to represent a 2,6-diyl group, a decahydronaphthalene-2,6-diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, which are substituted by a fluorine atom It is more preferable to represent the following structure.

It is more preferable to represent the following structure.

Z ^J1 and Z ^J2 each preferably independently represent -CH ₂ O-, -OCH _2- , -CF ₂ O-, -CH ₂ CH _2- , -CF ₂ CF ₂ -or a single bond,- More preferred is OCH ₂ —, —CF ₂ O—, —CH ₂ CH ₂ — or a single bond, and particularly preferred is —OCH ₂ —, —CF ₂ O— or a single bond.

X ^J1 is preferably a fluorine atom or a trifluoromethoxy group, more preferably a fluorine atom.

n ^J1 is preferably 0, 1, 2 or 3, preferably 0, 1 or 2, and if emphasis is placed on improvement of Δε, then 0 or 1 is preferred, and if emphasis is placed on T _NI , 1 or 2 is preferred. preferable.

  There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds to be used are, for example, one type, two types, and three types in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, there are four types, five types, six types, and seven or more types.

  In the composition, the content of the compound represented by the general formula (J) is the solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant It is necessary to adjust appropriately according to the required performance such as anisotropy.

  The lower limit of the preferable content of the compound represented by the general formula (J) to the total amount of the composition is 1%, 10%, 20%, 30%, 40% , 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferable content is, for example, 95%, 85%, 75%, 65%, 55% in one form of the present invention, based on the total amount of the composition. 45%, 35% and 25%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

When importance is attached to reliability, R ^J1 is preferably an alkyl group, and when importance is attached to decrease in viscosity, it is preferably an alkenyl group.

  As a compound represented by General formula (J), the compound represented by General formula (M) and the compound represented by General formula (K) are preferable.

  The composition preferably contains one or more compounds represented by formula (M). These compounds correspond to dielectrically positive compounds (Δε is greater than 2).

(Wherein, R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are each independently -CH = CH-,- It may be substituted by C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^M1 represents 0, 1, 2, 3 or 4 and
A ^M1 and A ^M2 are each independently
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O- or -S- And (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =)
And one or more hydrogen atoms on the above groups (a) and (b) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom, and Well,
Z ^M1 and ^{Z M2} each independently represent a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O-, -COO-, -OCO- or -C≡C-
When n ^M1 is 2, 3 or 4 and there are a plurality of ^{AM 2} , they may be the same or different, and n ^M1 is 2, 3 or 4 and a plurality of Z ^M1 is present If they are identical or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group.

In general formula (M), R ^M1 is an alkyl group having 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 having 2 to 8 carbon atoms Group is preferable, and an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is preferable. An alkyl group of 1 to 5 or an alkenyl group of 2 to 5 carbon atoms is more preferable, an alkyl group of 2 to 5 carbon atoms or an alkenyl group of 2 to 3 carbon atoms is further preferable, and an alkenyl group of 3 carbon atoms (Propenyl group) is particularly preferred.

When importance is attached to reliability, R ^M1 is preferably an alkyl group, and when importance is attached to decrease in viscosity, it is preferably an alkenyl group.

  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 Alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain Preferred is an alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, preferably linear.

  The alkenyl group is preferably selected from the groups represented by any one of formulas (R1) to (R5). (The black dot in each formula represents a carbon atom in a ring structure to which an alkenyl group is bonded.)

A ^M1 and A ^M2 are each preferably aromatic when it is required to increase Δn independently, and in order to improve the response speed, it is preferably aliphatic, and 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 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- It is preferable to represent a diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferable to represent the following structure,

It is more preferable to represent the following structure.

Z ^M1 and ^{Z M2} each _{independently -CH 2 O -, - CF 2} O -, - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CF 2 O-, -CH ₂ CH ₂ - or a single bond is more preferable, _-CF 2 O-or a single bond is particularly preferred.

n ^M1 is preferably 0, 1, 2 or 3 and is preferably 0, 1 or 2; 0 or 1 is preferred when emphasis is placed on improvement of Δε, and 1 or 2 is preferred when T _NI is emphasized preferable.

  There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds to be used are, for example, one type, two types, and three types in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, there are four types, five types, six types, and seven or more types.

  In the composition, the content of the compound represented by the general formula (M) is the solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, drip marks, image sticking, dielectric constant It is necessary to adjust appropriately according to the required performance such as anisotropy.

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

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  It is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (M-1).

(Wherein, R ^M11 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M11 to X ^M15 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^M11 represents a fluorine atom or OCF ₃ ))
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (M-1) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by General Formula (M-1) is specifically a compound represented by Formula (M-1.1) to Formula (M-1.4), The compound represented by M-1.1) or Formula (M-1.2) is preferable, and the compound represented by Formula (M-1.2) is more preferable. Moreover, it is also preferable to use simultaneously the compound represented by Formula (M-1.1) or Formula (M-1.2).

  The lower limit of the preferable content of the compound represented by the formula (M-1.1) to the total amount of the composition is 1%, 2%, 5%, 6% . The upper limit value of the preferable content is 15%, 13%, 10%, 8%, 5%.

  The lower limit of the preferable content of the compound represented by the formula (M-1.2) to the total amount of the composition is 1%, 2%, 5%, 6% . The upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.

  The lower limit of the preferable content of the total of the compounds represented by the formula (M-1.1) and the formula (M-1.2) with respect to the total amount of the composition is 1%, 2% Yes, 5% and 6%. The upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (M-2).

(Wherein, R ^M21 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M21 and X ^M22 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^M21 represents a fluorine atom, a chlorine atom or OCF ₃ ))
The lower limit of the preferable content of the compound represented by the formula (M-1) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit and to lower the upper limit when a composition that hardly causes seizure is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-2) is preferably a compound represented by Formula (M-2.1) to Formula (M-2.5), and the compound represented by Formula (M-2. 3) or / and a compound represented by the formula (M-2.5) is preferable.

  The lower limit of the preferable content of the compound represented by the formula (M-2.2) with respect to the total amount of the composition is 1%, 2%, 5%, 6% . The upper limit value of the preferable content is 15%, 13%, 10%, 8%, 5%.

  The lower limit of the preferable content of the compound represented by the formula (M-2.3) to the total amount of the composition is 1%, 2%, 5%, 6% . The upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.

  The lower limit of the preferable content of the compound represented by the formula (M-2.5) to the total amount of the composition is 1%, 2%, 5%, 6% . The upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.

  The lower limit value of the preferable content of the total of the compounds represented by Formula (M-2.2), (M-2.3) and Formula (M-2.5) with respect to the total amount of the composition is It is 1%, 2%, 5% and 6%. The upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.

  The content is preferably 1% or more, more preferably 5% or more, still more preferably 8% or more, still more preferably 10% or more, still more preferably 14% or more, based on the total amount of the composition. % Or more is particularly preferred. In addition, in consideration of solubility at a low temperature, transition temperature, electrical reliability, etc., the maximum ratio is preferably 30% or less, preferably 25% or less, more preferably 22% or less, and 20% Less than is particularly preferred.

  It is preferable that the compound represented by general formula (M) used for this composition is a compound represented by general formula (M-3).

(Wherein, R ^M31 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M31 to X ^M36 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^M31 represents a fluorine atom, a chlorine atom or OCF ₃ ))
There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (M-3) is an upper limit value and a lower limit in each embodiment in consideration of characteristics such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like There is a value.

  The lower limit of the preferable content of the compound represented by the formula (M-3) to the total amount of the composition is 1%, 2%, 4%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%. The upper limit value of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

  Furthermore, the compound represented by the general formula (M-3) used in the composition is specifically a compound represented by the formula (M-3.1) to the formula (M-3.8) It is preferable to contain the compound represented by Formula (M-3.1) and / or Formula (M-3.2) among them.

  The lower limit of the preferable content of the compound represented by the formula (M-3.1) to the total amount of the composition is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%. The upper limit value of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

  The lower limit of the preferable content of the compound represented by the formula (M-3.2) to the total amount of the composition is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%. The upper limit value of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

  The lower limit of the preferable content of the total of the compounds represented by the formula (M-3.1) and the formula (M-3.2) with respect to the total amount of the composition is 1%, 2% Yes, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit value of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the group represented by general formula (M-4).

(Wherein, R ^M41 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M41 to X ^M48 are each independently fluorine Represents an atom or a hydrogen atom, and Y ^M41 represents a fluorine atom, a chlorine atom or OCF ₃ ))
There are no particular limitations on the compounds that can be combined, but it is preferable to combine one, two or more in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like.

  The content of the compound represented by the general formula (M-4) is an upper limit value and a lower limit in each embodiment in consideration of characteristics such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like There is a value.

  The lower limit of the preferable content of the compound represented by the formula (M-4) to the total amount of the composition is 1%, 2%, 4%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  When the composition is used for a liquid crystal display element having a small cell gap, it is suitable to increase the content of the compound represented by Formula (M-4). When used for a liquid crystal display element with a small driving voltage, it is suitable to increase the content of the compound represented by General Formula (M-4). Moreover, when used for liquid crystal display elements used in a low temperature environment, it is suitable to reduce the content of the compound represented by Formula (M-4). When it is a composition used for a liquid crystal display element with a quick response speed, it is suitable to make content of a compound represented by general formula (M-4) small.

  Furthermore, the compound represented by General Formula (M-4) used in the composition is specifically a compound represented by Formula (M-4.1) to Formula (M-4.4) It is preferable to contain the compounds represented by the formula (M-4.2) to the compounds represented by the formula (M-4.4). It is more preferable to do.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound represented by general formula (M-5).

(Wherein, R ^M51 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M51 and X ^M52 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^M51 represents a fluorine atom, a chlorine atom or OCF ₃ ))
There is no limitation on the types of compounds that can be combined, but in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., they are used in appropriate combination for each embodiment. For example, in one embodiment of the present invention, one in another embodiment, two in another embodiment, three in yet another embodiment, four in still another embodiment, five in yet another embodiment, In still another embodiment, six or more types are combined.

  The lower limit of the preferable content of the compound represented by the formula (M-5) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferable content is 50%, 45%, 40%, 35%, 33%, 30%, 28%, 25%, 23% 20%, 18%, 15%, 13%, 10%, 8%, 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit and to lower the upper limit when a composition that hardly causes seizure is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-5) is preferably a compound represented by Formula (M-5.1) to Formula (M-5.4), and Formula (M-5. It is preferable that it is a compound represented by 1) to Formula (M-5.4).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 5%, 8%, 10%, 13%, 15%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-5) is preferably a compound represented by Formula (M-5. 11) to Formula (M-5. 17), and the compound represented by Formula (M-5. 11) Compounds represented by Formula (M-5.13) and Formula (M-5.17) are preferable.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 5%, 8%, 10%, 13%, 15%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-5) is preferably a compound represented by Formula (M-5. 21) to Formula (M-5. 28), and the compound represented by Formula (M-5. 21) It is preferable that it is a compound represented by Formula (M-5.22), Formula (M-5.23), and Formula (M-5.25).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 5%, 8%, 10%, 13%, It is 15%, 18%, 20%, 22%, 25% and 30%. The upper limit of the preferred content is 40%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18% 15%, 13%, 10%, 8%, 5%.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound represented by general formula (M-6).

(Wherein, R ^M61 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^M61 to X ^M64 are each independently fluorine Represents an atom or a hydrogen atom, and Y ^M61 represents a fluorine atom, a chlorine atom or OCF ₃ ))
There is no limitation on the types of compounds that can be combined, but they are combined as appropriate in each embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like.

  The lower limit of the preferable content of the compound represented by the formula (M-6) to the total amount of the composition is 1%, 2%, 4%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  When the composition is used for a liquid crystal display device having a small driving voltage, it is suitable to increase the content of the compound represented by Formula (M-6). When the composition is used for a liquid crystal display element having a high response speed, it is suitable to reduce the content of the compound represented by Formula (M-6).

  Furthermore, it is preferable that the compound represented by general formula (M-6) is specifically a compound represented by formula (M-6.1) to formula (M-6.4), among which It is preferable to contain the compound represented by M-6.2) and Formula (M-6.4).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, it is preferable that the compound represented by general formula (M-6) is specifically a compound represented by formula (M-6. 11) to formula (M-6. 14), among which formula (M-6) It is preferable to contain the compound represented by M-6.12) and Formula (M-6.14).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, specifically, the compound represented by General Formula (M-6) is preferably a compound represented by Formula (M-6. 21) to Formula (M-6. 24) It is preferable to contain the compound represented by M-6.21), Formula (M-6.22), and Formula (M-6.24).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, compounds represented by general formula (M-6) are specifically preferably compounds represented by formula (M-6.31) to formula (M-6.34). It is preferable to contain the compound represented by Formula (M-6.31) and Formula (M-6.32) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, it is preferable that the compound represented by general formula (M-6) is specifically a compound represented by formula (M-6. 41) to formula (M-6. 44), among which It is preferable to contain the compound represented by M-6.42).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M) is preferably a compound selected from the group of compounds represented by General Formula (M-7).

(Wherein, each of X ^M71 to X ^M76 independently represents a fluorine atom or a hydrogen atom, and R ^M71 is an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or 1 to 4 carbon atoms 4 represents an alkoxy group, and Y ^M71 represents a fluorine atom or OCF ₃ ))
Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-2 types from these compounds, It is more preferable to contain 1 type-3 types, and 1 type-4 types are contained Is more preferred.

  The content of the compound represented by the general formula (M-7) is an upper limit value and a lower limit in each embodiment in consideration of characteristics such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like There is a value.

  The lower limit of the preferable content of the compound represented by the formula (M-7) to the total amount of the composition is 1%, 2%, 4%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  When the composition is used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by general formula (M-7). When used for a liquid crystal display element with a small driving voltage, it is suitable to increase the content of the compound represented by General Formula (M-7). When used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (M-7). In the case of a composition used for a liquid crystal display element having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (M-7).

  Furthermore, the compound represented by General Formula (M-7) is preferably a compound represented by Formula (M-7.1) to Formula (M-7.4), and the compound represented by Formula (M-7. It is preferable that it is a compound represented by 2).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-7) is preferably a compound represented by Formula (M-7.11) to Formula (M-7.14), and the compound represented by Formula (M-7. 11) and the compounds represented by formula (M-7.12).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-7) is preferably a compound represented by Formula (M-7.21) to Formula (M-7.24), and the compound represented by Formula (M-7. 21) and the compounds represented by formula (M-7.22).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M) is preferably a compound represented by General Formula (M-8).

^(Wherein the ^{X M81 X M84} each independently represents a fluorine atom or a hydrogen ^{atom, Y M81} fluorine atom, a chlorine atom or -OCF ^{_3, R M81} is an alkyl group having 1 to 5 carbon atoms, And each of A ^{M 81} and A ^{M 82} independently represents 1,4-cyclohexylene group, 1,4-phenylene group, or an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

However, the hydrogen atom on the 1,4-phenylene group may be substituted by a fluorine atom. )
The lower limit value of the preferable content of the compound represented by General Formula (M-8) with respect to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by the general formula (M-8) used in the composition is specifically a compound represented by the formula (M-8.1) to the formula (M-8.4) It is preferable to contain the compound represented by Formula (M-8.1) and Formula (M-8.2) especially.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by the general formula (M-8) used in the composition is specifically a compound represented by the formula (M-8.11) to the formula (M-8.14) It is preferable to contain the compound represented by Formula (M-8.12) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-8) used in the composition is specifically a compound represented by Formula (M-8.21) to Formula (M-8.24) It is preferable to contain the compound represented by Formula (M-8.22) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Further, the compound represented by the general formula (M-8) used in the composition is specifically a compound represented by the formula (M-8.31) to the formula (M-8.34) It is preferable to contain the compound represented by Formula (M-8. 32) especially.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M-8) used in the composition is specifically a compound represented by Formula (M-8.41) to Formula (M-8.44) It is preferable to contain the compound represented by Formula (M-8. 42) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by the general formula (M-8) used in the composition is specifically a compound represented by the formula (M-8.51) to the formula (M-8.54) It is preferable to contain the compound represented by Formula (M-8.52) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, the compound represented by General Formula (M) may have the following partial structure in its structure.

(The black point in the formula represents a carbon atom in the ring structure to which the above partial structure is bonded.)
It is preferable that it is a compound represented by general formula (M-10)-(M-18) as a compound which has the said partial structure.

  The compounds represented by General Formula (M-10) are as follows.

( ^Wherein , each of X ^M101 and X ^M102 independently represents a fluorine atom or a hydrogen atom, Y ^M101 represents a fluorine atom, a chlorine atom or -OCF ₃ , R ^M101 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M101} and ^{W M102} are each independently, -CH ₂ - represents a or -O-).
The lower limit value of the preferable content of the compound represented by General Formula (M-10) with respect to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-10) used in the composition is specifically a compound represented by Formula (M-10.1) to Formula (M-10.12) It is preferable to contain the compounds represented by Formula (M-10.5) to Formula (M-10.12) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-11) are as follows.

( ^Wherein , X ^{M111 to} X ^M114 each independently represent a fluorine atom or a hydrogen atom, Y ^M111 represents a fluorine atom, a chlorine atom or -OCF ₃ , R ^M111 represents an alkyl group having 1 to 5 carbon atoms, Represents an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)
The lower limit of the preferable content of the compound represented by General Formula (M-11) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by the general formula (M-11) used in the composition is specifically a compound represented by the formula (M-11.1) to the formula (M-11.8) It is preferable to contain the compounds represented by Formula (M-11.1) to Formula (M-11.4) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-12) are as follows.

( ^Wherein , each of X ^M121 and X ^M122 independently represents a fluorine atom or a hydrogen atom, Y ^M121 represents a fluorine atom, a chlorine atom or -OCF ₃ , R ^M121 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M121} and ^{W M122} are each independently, -CH ₂ - represents a or -O-).
The lower limit of the preferable content of the compound represented by General Formula (M-12) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-12) used in the composition is specifically a compound represented by Formula (M-12.1) to Formula (M-12.12) It is preferable to contain the compounds represented by Formula (M-12.5) to Formula (M-12.8) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-13) are as follows.

( ^Wherein , each of X ^{M131 to} X ^M134 independently represents a fluorine atom or a hydrogen atom, Y ^M131 represents a fluorine atom, a chlorine atom or -OCF ₃ , R ^M131 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M131} and ^{W M132} are each independently, -CH ₂ - represents a or -O-).
The lower limit of the preferable content of the compound represented by General Formula (M-13) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

Furthermore, the compound represented by General Formula (M-13) used in the composition is specifically a compound represented by Formula (M-13. 1) to Formula (M-13. 28) Among them, it is preferable to use any of the formulas (M-13.1) to (M-13.4), (M-13.11) to (M-13.14) and (M-13.25) to (M- It is preferable to contain the compound represented by 13.28).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by General Formula (M-14) are as follows.

^(Wherein, X ^{M 141 to X M144} independently represents a fluorine atom or a hydrogen ^{atom, Y M 141} is a fluorine atom, a chlorine atom or -OCF ^{_3, R M 141} represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M 141} and ^{W M142} are each independently, -CH ₂ - represents a or -O-).
The lower limit value of the preferable content of the compound represented by General Formula (M-14) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-14) used in the composition is specifically a compound represented by Formula (M-14. 1) to Formula (M-14.8) It is preferable to contain the compound represented by Formula (M-14.5) and Formula (M-14.8) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-15) are as follows.

^{(Wherein, X M151} and ^{X M152} each independently represents a fluorine atom or a hydrogen ^{atom, Y M151} fluorine atom, a chlorine atom or -OCF ^{_3, R M151} is an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M151} and ^{W M152} are each independently, -CH ₂ - represents a or -O-).
The lower limit value of the preferable content of the compound represented by General Formula (M-15) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-15) used in the composition is specifically a compound represented by Formula (M-15.1) to Formula (M-15.14) And the compounds represented by formulas (M-15.5) to (M-15.8) and formulas (M-15.11) to (M-15.14) are preferred. Is preferred.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-16) are as follows.

^(Wherein, X ^{M161 to X M164} independently represents a fluorine atom or a hydrogen ^{atom, Y M161} fluorine atom, a chlorine atom or -OCF ^{_3, R M161} is an alkyl group having 1 to 5 carbon atoms, Represents an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)
The lower limit value of the preferable content of the compound represented by General Formula (M-16) with respect to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-16) used in the composition is specifically a compound represented by Formula (M-16.1) to Formula (M-16.8) It is preferable to contain the compounds represented by Formula (M-16.1) to Formula (M-16.4) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by General Formula (M-17) are as follows.

^{(Wherein, X M171 ~X M174} independently represents a fluorine atom or a hydrogen ^{atom, Y M171} fluorine atom, a chlorine atom or -OCF ^{_3, R M171} is an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, W M171} and ^{W M172} are each independently, -CH ₂ - represents a or -O-).
The lower limit of the preferable content of the compound represented by General Formula (M-17) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-17) used in the composition is specifically a compound represented by Formula (M-17.1) to Formula (M-17.52) Among them, formula (M-17.9) to formula (M-17.12) and formula (M-17.21) to formula (M-17.28) and formula (M-17.45) are preferable. It is preferable to contain the compound represented by Formula (M-17.48).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compounds represented by formula (M-18) are as follows.

( ^Wherein , each of X ^{M181 to} X ^M186 independently represents a fluorine atom or a hydrogen atom, Y ^M181 represents a fluorine atom, a chlorine atom or -OCF ₃ , R ^M181 represents an alkyl group having 1 to 5 carbon atoms, Represents an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)
The lower limit of the preferable content of the compound represented by General Formula (M-18) to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, in the case where a composition that hardly causes sticking is required, it is preferable to lower the above lower limit and lower the upper limit. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, the compound represented by General Formula (M-18) used in the composition is specifically a compound represented by Formula (M-18.1) to Formula (M-18.12) It is preferable to contain the compounds represented by Formula (M-18.5) to Formula (M-18.8) among them.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (M-19).

(Wherein, R ^{M 191} represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and Z ^{M 191} represents a single bond or —CH ₂ CH _{2 -, - (CH 2) 4} -, - OCH 2 -, - CH 2 O -, - COO -, - OCO- or represents ^-C≡C-, from ^{X M191 X M195} is a hydrogen atom or independently Represents a fluorine atom)
Furthermore, it is preferable that the compound represented by General Formula (M-19) is specifically a compound represented by Formula (M-19. 1) to Formula (M-19. 4), The compound represented by M-19.2) is more preferable. Moreover, it is also preferable to use 2 or more types simultaneously among each compound represented by Formula (M-19. 1) to Formula (M-19. 4).

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (M-20).

(Wherein, R ^M201 represents an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms, and X ^M201 to X ^M203 are each independently hydrogen Represents an atom or a fluorine atom)
Furthermore, it is preferable that the compound represented by general formula (M-20) is a compound specifically represented by formula (M-20.1) to formula (M-20.3). Moreover, it is also preferable to use 2 or more types simultaneously among each compound represented by Formula (M-20.1) to Formula (M-20.3).

  The composition preferably contains one or more compounds represented by formula (K). These compounds correspond to dielectrically positive compounds (Δε is greater than 2).

(Wherein, R ^K1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are each independently -CH = CH-,- It may be substituted by C≡C-, -O-, -CO-, -COO- or -OCO-,
n ^K1 represents 0, 1, 2, 3 or 4;
A ^K1 and A ^K2 are each independently
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O- or -S- And (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =)
And one or more hydrogen atoms on the above groups (a) and (b) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom, and Well,
Z ^K1 and ^{Z K2} each independently represent a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O-, -COO-, -OCO- or -C≡C-
When n ^K1 is 2, 3 or 4 and there are a plurality of ^{AK 2} , they may be the same or different, and n ^K1 is 2, 3 or 4 and a plurality of Z ^K1 is present If they are identical or different,
X ^K1 and X ^K3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^K2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group. )
In the general formula (K), R ^K1 represents an alkyl group having 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 having 2 to 8 carbon atoms Group is preferable, and an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is preferable. An alkyl group of 1 to 5 or an alkenyl group of 2 to 5 carbon atoms is more preferable, an alkyl group of 2 to 5 carbon atoms or an alkenyl group of 2 to 3 carbon atoms is further preferable, and an alkenyl group of 3 carbon atoms (Propenyl group) is particularly preferred.

When importance is attached to reliability, R ^K1 is preferably an alkyl group, and when importance is attached to decrease in viscosity, it is preferably an alkenyl group.

  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 Alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain Preferred is an alkoxy group having 1 to 4 carbon atoms and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, preferably linear.

  The alkenyl group is preferably selected from the groups represented by any one of formulas (R1) to (R5). (The black dot in each formula represents a carbon atom in a ring structure to which an alkenyl group is bonded.)

It is preferable that A ^K1 and A ^K2 be each independently aromatic when it is required to increase Δn independently, and in order to improve the response speed, it is preferably aliphatic, and 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 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- It is preferable to represent a diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferable to represent the following structure,

It is more preferable to represent the following structure.

Z ^K1 and ^{Z K2} are each _{independently -CH 2 O -, - CF 2} O -, - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CF 2 O-, -CH ₂ CH ₂ - or a single bond is more preferable, _-CF 2 O-or a single bond is particularly preferred.

n ^K1 is preferably 0, 1, 2 or 3, preferably 0, 1 or 2, and if emphasis is placed on improvement of Δε, then 0 or 1 is preferred, and if emphasis is placed on T _NI , 1 or 2 is preferred. preferable.

  There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds to be used are, for example, one type, two types, and three types in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, there are four types, five types, six types, and seven or more types.

  In the composition, the content of the compound represented by the general formula (K) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant It is necessary to adjust appropriately according to the required performance such as anisotropy.

  The lower limit of the preferable content of the compound represented by the formula (K) to the total amount of the composition is 1%, 10%, 20%, 30%, 40% Yes, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferable content is, for example, 95%, 85%, 75%, 65%, 55% in one form of the present invention, based on the total amount of the composition. 45%, 35% and 25%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-1), for example.

(Wherein, R ^K11 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^{K11 to} X ^K14 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^K11 represents a fluorine atom or OCF ₃ ))
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-1) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by General Formula (K-1) is specifically a compound represented by Formula (K-1.1) to Formula (K-1.4), The compound represented by K-1.1) or Formula (K-1.2) is preferable, and the compound represented by Formula (K-1.2) is more preferable. Moreover, it is also preferable to use simultaneously the compound represented by Formula (K-1.1) or Formula (K-1.2).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-2), for example.

(Wherein, R ^K21 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^{K21 to} X ^K24 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^K21 represents a fluorine atom or OCF ₃ ))
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-2) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by General Formula (K-2) is specifically a compound represented by Formula (K-2.1) to Formula (K-2.6), The compound represented by K-2.5) or Formula (K-2.6) is preferable, and the compound represented by Formula (K-2.6) is more preferable. Moreover, it is also preferable to use simultaneously the compound represented by Formula (K-2.5) or Formula (K-2.6).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-3), for example.

(Wherein, R ^K31 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^{K31 to} X ^K36 are each independently hydrogen Represents an atom or a fluorine atom, and Y ^K31 represents a fluorine atom or OCF ₃ ))
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-3) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by General Formula (K-3) is specifically a compound represented by Formula (K-3.1) to Formula (K-3.4), It is more preferable that it is a compound represented by K-3.1) or Formula (K-3.2). Moreover, it is also preferable to use the compound represented by Formula (K-3.1) and Formula (K-3.2) simultaneously.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-4), for example.

(Wherein, R ^K41 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^{K41 to} X ^K46 are each independently hydrogen Y ^{K 41} represents a fluorine atom or OCF ₃ , and Z ^{K 41} represents —OCH ₂ —, —CH ₂ O—, —OCF ₂ — or —CF ₂ O—.
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-4) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by general formula (K-4) is specifically a compound represented by formula (K-4.1) to formula (K-4.18), The compounds represented by K-4.1), formula (K-4.2), formulas (K-4.11) and (K-4.12) are more preferable. Moreover, it is also preferable to use simultaneously the compound represented by Formula (K-4.1), Formula (K-4.2), Formula (K-4.11), (K-4.12).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-5), for example.

(Wherein, R ^K51 represents an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 2 to 5 carbon atoms, or an alkoxy group of 1 to 4 carbon atoms, and X ^{K51 to} X ^K56 are each independently hydrogen Y ^{K 51} represents a fluorine atom or OCF ₃ , and Z ^{K 51} represents -OCH _2- , -CH ₂ O-, -OCF ₂ -or -CF ₂ O-.
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-5) to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by general formula (K-5) is specifically a compound represented by formula (K-5.1) to formula (K-5.18), The compounds represented by K-5.11) to the formula (K-5.14) are preferable, and the compounds represented by the formula (K-5.12) are more preferable.

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The compound represented by General Formula (K) is preferably a compound selected from the group of compounds represented by General Formula (K-6), for example.

( ^Wherein , R ^{K 61} represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ^{K 61 to} X ^{K 68} each independently represent hydrogen) represents an atom or a fluorine ^{atom, Y K61} represents a fluorine atom or OCF ^{_3, Z K61} is _{-OCH 2 -, - CH 2 O} -, - OCF 2 - or an _-CF 2 O-).
There is no particular limitation on the types of compounds that can be combined, but they are used in combination according to the desired properties such as low temperature solubility, transition temperature, electrical reliability, birefringence and the like. The types of compounds used are, for example, one type, two types, and three or more types in one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (K-6) relative to the total amount of the composition is 1%, 2%, 5%, 8%, 10 %, 13%, 15%, 18%, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

It is preferable to keep the viscosity of the composition low and lower the above lower limit value and lower the upper limit value when a composition having a high response speed is required. Furthermore, it is preferable to keep the _TNI of the composition high and to lower the above lower limit value and lower the upper limit value when a composition having good temperature stability is required. When it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable to raise the lower limit and raise the upper limit.

  Furthermore, it is preferable that the compound represented by General Formula (K-6) is specifically a compound represented by Formula (K-6.1) to Formula (K-6.18), The compound represented by K-6.15) to a formula (K-6.18) is preferable, and the compound represented by a formula (K-6.16) and a formula (K-6.17) is further more preferable. Moreover, it is also preferable to use simultaneously the compound represented by Formula (K-6.16) and Formula (K-6.17).

  The lower limit of the preferable content of these compounds to the total amount of the composition is 1%, 2%, 4%, 5%, 8%, 10%. It is 13%, 15%, 18% and 20%. The upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.

  The liquid crystal composition preferably contains one or more compounds represented by general formula (L). The compounds represented by the general formula (L) correspond to dielectric substantially neutral compounds (the value of Δε is −2 to 2).

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are independently of each other It may be substituted by -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 each independently (a) 1,4-cyclohexylene group (one -CH _2- present in this group or two or more non-adjacent -CH _2- May be replaced by -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = is -N May be replaced by =.)
(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 = or two or more non-adjacent —CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group may be replaced by —N =. )
And one or more hydrogen atoms present in the groups (a), (b) and (c) are each independently a cyano group or a fluorine It may be substituted by an atom or a chlorine atom,
Z ^L1 and ^{Z L2} each independently represent a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF 2 _{-, - CF 2 O -,} - CH = N-N = CH -, - CH = CH -, - represents CF = CF- or -C≡C-,
When n ^L1 is 2 or 3 and a plurality of A ^L2 is present, they may be the same or different, and when n ^L1 is 2 or 3 and a plurality of Z ^L2 is present, they may be Are the same as or different from each other, but the compounds represented by formula (J) are excluded. )
The compounds represented by formula (L) may be used alone or in combination. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the desired performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of compound used is, for example, one type in one embodiment of the present invention. Or in another embodiment of the present invention, there are 2 types, 3 types, 4 types, 5 types, 5 types, 6 types, 7 types, 8 types, 9 types and 10 It is more than kind.

  In the composition, the content of the compound represented by the general formula (L) is the solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric constant It is necessary to adjust appropriately according to the required performance such as anisotropy.

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

When it is necessary to keep the viscosity of the composition low and have a high response speed, it is preferable that the lower limit is high and the upper limit is high. Furthermore, when _TNI of the composition of the present invention is kept high and a composition having good temperature stability is required, it is preferable that the above lower limit value is high and the upper limit value is high. 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 be low and the upper limit value be low.

When reliability is important, both R ^L1 and R ^L2 are preferably alkyl groups, and when importance is given to reducing the volatility of the compound, alkoxy groups are preferable, and viscosity reduction is important When doing, at least one is preferably an alkenyl group.

    The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3 and is preferably 0 or 1. When importance is attached to compatibility with other liquid crystal molecules, 1 is preferred.

R ^L1 and R ^L2 are, when the ring structure to which they are bonded is a phenyl group (aromatic), a linear alkyl group of 1 to 5 carbon atoms, or a linear alkyl group of 1 to 4 carbon atoms Alkoxy groups and alkenyl groups having 4 to 5 carbon atoms are preferred, and in the case where the ring structure to which they are attached is a saturated ring structure such as cyclohexane, pyran and dioxane, a straight chain having 1 to 5 carbon atoms The alkyl group, the linear alkoxy group having 1 to 4 carbon atoms, and the linear alkenyl group having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, preferably linear.

  The alkenyl group is preferably selected from the groups represented by any one of formulas (R1) to (R5). (The black dot in each formula represents a carbon atom in the ring structure.)

n ^L1 is preferably 0 when importance is attached to the response speed, 2 or 3 is preferable to improve the upper limit temperature of the nematic phase, and 1 is preferable to balance them. Moreover, in order to satisfy the characteristics required as a composition, it is preferable to combine compounds of different values.

A ^{L 1} , A ^{L 2} and A ^{L 3} are preferably aromatic when it is required to increase Δn, and are preferably aliphatic to improve the response speed, and each of them is independently 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] octyrene group piperidine-1,4-diyl group naphthalene-2,6-diyl group decahydronaphthalene-2,6 -Preferably represents a diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, more preferably represents the following structure,

More preferably, it represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

It is preferable that Z ^L1 and Z ^L2 be a single bond when the response speed is important.

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

  It is preferable that the compound represented by general formula (L) is a compound chosen from the compound group represented by general formula (L-1)-(L-9).

  The compounds represented by General Formula (L-1) are the following compounds.

(Wherein, R ^L11 and R ^L12 each independently represent the same meaning as R ^L1 and R ^L2 in general formula (L).)
R ^L11 and R ^L12 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

  Although the compound represented by general formula (L-1) can also be used independently, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

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

When it is necessary to keep the viscosity of the composition low and have a high response speed, it is preferable that the lower limit is high and the upper limit is high. Moreover, maintaining high T _NI of the composition, it is preferred if good composition temperature stability is required is the upper limit value in the lower limit of the above is moderate is moderate. 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 Formula (L-1) is preferably a compound selected from the group of compounds represented by Formula (L-1-1).

(Wherein, R ^L12 represents the same meaning as in the general formula (L-1).)
The compound represented by General Formula (L-1-1) is a compound selected from the compound group represented by Formula (L-1-1. 1) to Formula (L- 1-1. 3) It is preferable that it is a compound represented by formula (L-1-1.2) or formula (L-1-1.3), in particular, it is represented by formula (L-1-1.3) It is preferable that it is a compound.

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

  The compound represented by Formula (L-1) is preferably a compound selected from the group of compounds represented by Formula (L-1-2).

(Wherein, R ^L12 represents 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) to the total amount of the composition is 1%, 5%, 10%, and 15%. 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, based on the total amount of the composition. Yes, 35%, 33% and 30%.

Furthermore, the compound represented by General Formula (L-1-2) is a compound selected from the group of compounds represented by Formula (L-2.1) to Formula (L-1-2.4) And the compounds represented by formulas (L-1-2.2) to (L-1-2.4) are preferable. In particular, a compound represented by the formula (L-1-2.2) is preferable in order to particularly improve the response speed of the composition. Further, when obtaining the high _{T NI} than the response speed, it is preferable to use a compound represented by formula (L-1-2.3) or the formula (L-1-2.4). It is not preferable that the content of the compounds represented by Formula (L-1-2.3) and Formula (L-1-2.4) be 30% 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-1-2.2) to the total amount of the composition is 10%, 15%, 18%, 20% , 23%, 25%, 27%, 30%, 33%, 35%, 38%, 40%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, based on the total amount of the composition. Yes, 35%, 32%, 30%, 27%, 25%, 22%.

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

  The compound represented by Formula (L-1) is preferably a compound selected from the group of compounds represented by Formula (L-1-3).

(In the formula, R ^L13 and R ^L14 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
R ^L13 and R ^L14 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-1-3) to the total amount of the composition is 1%, 5%, 10%, 13% 15%, 17%, 20%, 23%, 25%, 30%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 40%, 37%, 35% based on the total weight of the composition. Yes, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10% is there.
Further, the compound represented by the general formula (L-1-3) is a compound selected from the group of compounds represented by the formula (L-3.1. 1) to the formula (L-1.3.1. 2) It is preferable that it is a compound represented by Formula (L-1-3.1), Formula (L-1-3.3), or Formula (L-1-3.4). In particular, the compound represented by the formula (L-3.1) is preferable in order to particularly improve the response speed of the composition. Further, when obtaining the high _{T NI} than the response speed of the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and formula (L It is preferable to use the compound represented by -1-3.12). The total of the compounds represented by the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1.3.11) and the formula (L-1.3.12) It is not preferable to make the content of 20% or more to improve the solubility at low temperature.

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

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

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
R ^L15 and R ^L16 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) to the total amount of the composition is 1%, 5%, 10%, 13% 15%, 17% and 20%. The upper limit of the preferred content is 25%, 23%, 20%, 17%, 15%, 13%, 10% based on the total amount of the composition. is there.

  The lower limit of the preferred content of the compound represented by the formula (L-1-5) to the total amount of the composition is 1%, 5%, 10%, 13% 15%, 17% and 20%. The upper limit of the preferred content is 25%, 23%, 20%, 17%, 15%, 13%, 10% based on the total amount of the composition. is there.

  Furthermore, the compounds represented by general formulas (L-1-4) and (L-1-5) are represented by formulas (L-4.1.) To (L-1-5.3) It is preferable that it is a compound selected from the compound group, and it is preferable that it is a compound represented by Formula (L-1-4.2) or Formula (L-1-5.2).

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

Formula (L-1-1.3), Formula (L-1-2.2), Formula (L-1-3.1), Formula (L-1-3.3), Formula (L-1-1.3) 3.4), It is preferable to combine 2 or more types of compounds chosen from the compound represented by Formula (L-1-3.11) and Formula (L-1-3.12), It is preferable -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 value of the preferable content of the total content of these compounds is the total amount of the composition Against 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20 %, 23%, 25% Yes, 27%, 30%, 33%, 35%, and the upper limit is 80%, 70%, 60% with respect to the total amount of the composition, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23% It is 20%. When importance is placed on the reliability of the composition, compounds represented by Formula (L-3.1.), Formula (L-1-3.3) and Formula (L-1-3.4)) It is preferable to combine two or more compounds selected from the above, and when importance is attached to the response speed of the composition, it is represented by the formula (L-1-1.3) and the formula (L-1-2.2) It is preferable to combine two or more compounds selected from
The compound represented by Formula (L-1) is preferably a compound selected from the group of compounds represented by Formula (L-1-6).

(In the formula, R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom.)
The lower limit of the preferable content of the compound represented by the formula (L-1-6) to the total amount of the composition is 1%, 5%, 10%, and 15%. 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, based on the total amount of the composition. Yes, 35%, 33% and 30%.

  Furthermore, the compound represented by General Formula (L-1-6) is a compound selected from the compound group represented by Formula (L-1-6.1) to Formula (L-1-6.3) Is preferred.

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

(Wherein, R ^L21 and R ^L22 each independently represent the same meaning as R ^L1 and R ^L2 in general formula (L).)
R ^L21 is preferably an alkyl group of 1 to 5 carbon atoms or an alkenyl group of 2 to 5 carbon atoms, and R ^L22 is an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 4 to 5 carbon atoms or a carbon atom The alkoxy group of the number 1-4 is preferable.

    Although the compound represented by general formula (L-1) can also be used independently, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

  When importance is given to solubility at low temperature, setting the content higher is more effective, and conversely, when importance is placed on response speed, setting the content smaller is more effective. Furthermore, in the case of improving the drop marks and the sticking characteristic, it is preferable to set the range of the content in the middle.

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

  Furthermore, the compound represented by General Formula (L-2) is preferably a compound selected from the group of compounds represented by Formula (L-2.1) to Formula (L-2.6), It is preferable that it is a compound represented by (L-2.1), Formula (L-2.3), Formula (L-2.4), and Formula (L-2.6).

  The compounds represented by General Formula (L-3) are the following compounds.

(Wherein, R ^L31 and R ^L32 each independently represent the same meaning as R ^L1 and R ^L2 in general formula (L).)
Each of R ^L31 and R ^L32 is preferably 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.

  Although a compound denoted by a general formula (L-3) can also be used alone, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

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

When obtaining a high birefringence highly effective when larger amount to set the content, on the contrary, when importance is attached to high T _NI highly effective when fewer to set the content. Furthermore, in the case of improving the drop marks and the sticking characteristic, it is preferable to set the range of the content in the middle.

  Furthermore, the compound represented by General Formula (L-3) is preferably a compound selected from the group of compounds represented by Formula (L-3.1) to Formula (L-3.4), It is preferable that it is a compound represented by (L-3.2) to Formula (L-3.7).

  The compounds represented by General Formula (L-4) are the following compounds.

(Wherein, R ^L41 and R ^L42 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)
R ^L41 is preferably an alkyl group of 1 to 5 carbon atoms or an alkenyl group of 2 to 5 carbon atoms, and R ^L42 is an alkyl group of 1 to 5 carbon atoms, an alkenyl group of 4 to 5 carbon atoms or a carbon atom The alkoxy group of the number 1-4 is preferable. )
Although a compound denoted by a general formula (L-4) can also be used alone, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

  In the composition, the content of the compound represented by the general formula (L-4) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to the required performance such as dielectric anisotropy.

  The lower limit of the preferable content of the compound represented by the formula (L-4) relative to the total amount of the composition is 1%, 2%, 3%, 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) to the total amount of the composition is 50%, 40%, 35%, 30%, 20 %, 15%, 10% and 5%.

  The compound represented by General Formula (L-4) is preferably a compound represented by Formula (L-4.1) to Formula (L-4.3), for example.

  Depending on required properties such as low temperature solubility, transition temperature, electrical reliability, birefringence, etc., the compound represented by the formula (L-4.1) may be represented by the formula (L-4.1) 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) Or all of the compounds represented by Formula (L-4.1) to Formula (L-4.3) may be contained. The lower limit of the preferable content of the compound represented by the formula (L-4.1) or the formula (L-4.2) to the total amount of the composition is 3%, 5%, 7%, 9%, 11%, 12%, 13%, 18%, 21%, preferred upper limit is 45, 40%, 35 %, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

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

  The compound represented by General Formula (L-4) is preferably a compound represented by Formula (L-4.4) to Formula (L-4.6), for example. It is preferable that it is a compound represented by these.

  Depending on the required properties such as low temperature solubility, transition temperature, electrical reliability, birefringence, etc., the compound represented by formula (L-4.4) may also contain formula (L 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) 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) to the total amount of the composition is 3%, 5%, 7%, 9%, 11%, 12%, 13%, 18%, 21%. The preferred upper limit is 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%. %, 10%, and 8%.

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

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

  The compounds represented by General Formula (L-5) are the following compounds.

(Wherein, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in general formula (L).)
R ^L51 is preferably an alkenyl group having 2 to 5 alkyl groups or carbon atoms of 1 to 5 carbon ^{atoms, R L52} is an alkyl group having 1 to 5 carbon atoms, an alkenyl group or a carbon atom of the carbon atoms 4-5 The alkoxy group of the number 1-4 is preferable.

  Although the compound represented by general formula (L-5) can also be used independently, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

  In the composition, the content of the compound represented by the general formula (L-5) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to the required performance such as dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-5) to the total amount of the composition is 1%, 2%, 3%, 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) relative to the total amount of the composition is 50%, 40%, 35%, 30%, 20 %, 15%, 10%, 5% The compound represented by the general formula (L-5) is represented by the formula (L-5.1) or the formula (L-5.2) It is preferable that it is a compound represented, and it is especially preferable that it is a compound represented by Formula (L-5.1).

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

  The compound represented by General Formula (L-5) is preferably a compound represented by Formula (L-5.3) or Formula (L-5.4).

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

  The compound represented by General Formula (L-5) is preferably a compound selected from the group of compounds represented by Formula (L-5.5) to Formula (L-5.7), and in particular It is preferable that it is a compound represented by L-5.7.

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

  The compounds represented by General Formula (L-6) are the following compounds.

(Wherein, R ^L61 and R ^L62 each independently represent the same as R ^L1 and R ^L2 in General Formula (L), and X ^L61 and X ^L62 each independently represent a hydrogen atom or a fluorine atom. )
Each of R ^L61 and R ^L62 is preferably independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one of X ^L61 and X ^L62 is a fluorine atom, and the other is a hydrogen atom Is preferred.

  Although a compound denoted by a general formula (L-6) can also be used alone, it can also be used combining two or more compounds. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (L-6) to the total amount of the composition is 1%, 2%, 3%, 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) to the total amount of the composition is 50%, 40%, 35%, 30%, 20 %, 15%, 10% and 5%. When emphasis is placed on increasing Δn, it is preferable to increase the content, and when emphasis is put on precipitation at low temperature, it is preferable to reduce the content.

  The compound represented by General Formula (L-6) is preferably a compound represented by Formula (L-6.1) to Formula (L-6.9).

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-3 types in these compounds, and 1 type-4 types are more preferable to contain. In addition, since a broad molecular weight distribution of the selected compound is also effective for solubility, for example, one compound represented by the formula (L-6.1) or (L-6.2), a compound of the formula (L- 6.4) or (L-6.5) from the compound represented by the formula (L-6.6) or the formula (L-6.7) It is preferable to select one type of compound from the compounds represented by -6.8) or (L-6.9) and appropriately combine these. 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 is preferred to include a compound.

  Furthermore, the compound represented by General Formula (L-6) is preferably a compound represented by Formula (L-6.10) to Formula (L-6.17), for example. It is preferable that it is a compound represented by L-6.

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

  The compounds represented by General Formula (L-7) are the following compounds.

(Wherein, R ^L71 and R ^L72 each independently represent the same as R ^L1 and R ^L2 in the general formula (L), and A ^L71 and A ^L72 are each independently A ^L2 and A ^L2 in the general formula (L) A hydrogen having the same meaning as A ^L3 is represented, but each of hydrogen atoms on A ^L71 and A ^L72 may be independently substituted by a fluorine atom, and Z ^L71 has the same meaning as Z ^L2 in formula (L), X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom.)
^{Wherein, R L71} and ^{R L72} are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms ^{preferably, A L71} and ^{A L72} each independently 1,4-cyclohexylene group or a 1,4-phenylene group is preferably a hydrogen atom on a ^L71 and a ^L72 may be substituted by fluorine atoms independently, Z ^L71 is a single A bond or COO- is preferable, a single bond is preferable, and X ^L71 and X ^L72 are preferably hydrogen atoms.

  There is no particular limitation on the types of compounds that can be combined, but they are combined according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of compound used is, for example, one type, two types, three types, and four types according to one embodiment of the present invention.

  In the composition, the content of the compound represented by the general formula (L-7) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to the required performance such as dielectric anisotropy.

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

It is preferable to increase the content of the compound represented by formula (L-7) when the composition is desired to have a high _TNI embodiment, and the content may be increased if a low viscosity embodiment is desired. It is preferable to reduce it.

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7.1) to Formula (L-7.4), and the compound represented by Formula (L-7. It is preferable that it is a compound represented by 2).

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7. 11) to Formula (L-7. 13), and the compound represented by Formula (L-7. It is preferable that it is a compound represented by 11).

  Furthermore, the compound represented by General Formula (L-7) is a compound represented by Formula (L-7.21) to Formula (L-7.23). It is preferable that it is a compound represented by Formula (L-7.21).

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7. 31) to Formula (L-7. 34), and the compound represented by Formula (L-7. 31) or / and a compound represented by the formula (L-7. 32) is preferable.

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7.41) to Formula (L-7.44), and the compound represented by Formula (L-7. 41) or / and a compound represented by the formula (L-7. 42) are preferable.

  Furthermore, the compound represented by General Formula (L-7) is preferably a compound represented by Formula (L-7.51) to Formula (L-7.53).

  The compounds represented by General Formula (L-8) are the following compounds.

(Wherein, R L ⁸¹ and R L ⁸² each independently represent the same meaning as R ^{L 1} and R ^{L 2} in general formula (L), and A L ⁸¹ represents the same meaning or single bond as A ^{L 1} in general formula (L) However, each hydrogen atom on ^{AL 81} may be independently substituted by a fluorine atom, and X ^{L81 to} X ^L86 each independently represent a fluorine atom or a hydrogen atom.)
^{Wherein, R L81} and ^{R L82} are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon atoms ^{preferably, A L81} is 1, 4-cyclohexylene group or 1,4-phenylene group is preferable, a hydrogen atom on a ^L71 and a ^L72 may be substituted independently by fluorine atoms, the general formula (L-8) in the same of The number of fluorine atoms on the ring structure is preferably 0 or 1, and the number of fluorine atoms in the molecule is preferably 0 or 1.

  There is no particular limitation on the types of compounds that can be combined, but they are combined according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of compound used is, for example, one type, two types, three types, and four types according to one embodiment of the present invention.

  In the composition, the content of the compound represented by the general formula (L-8) is low temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to the required performance such as dielectric anisotropy.

  The lower limit of the preferable content of the compound represented by the formula (L-8) to the total amount of the composition is 1%, 2%, 3%, 5%, 7 %, 10%, 14%, 16% and 20%. The upper limit of the preferable content of the compound represented by the formula (L-8) to the total amount of the composition is 30%, 25%, 23%, 20%, 18 %, 15%, 10% and 5%.

It is preferable to increase the content of the compound represented by formula (L-8) when the composition is desired to have a high _TNI embodiment, and the content may be increased if a low viscosity embodiment is desired. It is preferable to reduce it.

  Furthermore, the compound represented by General Formula (L-8) is preferably a compound represented by Formula (L-8.1) to Formula (L-8.4), and the compound represented by Formula (L-8. 3), the formula (L-8.5), the formula (L-8.6), the formula (L-8.13), the formula (L-8.16) to the formula (L-8. 18), the formula (L-8. 18) It is more preferable that it is a compound represented by L-8.23) to a formula (L-8.28).

  The compounds represented by General Formula (L-9) are the following compounds.

^{(Wherein, R L91} and ^{R L92} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
R ^L91 and ^{R L92} are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5 preferred.

  The compounds represented by General Formula (L-9) can be used alone, or two or more compounds can be used in combination. There is no particular limitation on the types of compounds that can be combined, but they are used in appropriate combination according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The type of the compound used is, for example, one type, two types, three types, four types, five types or more as one embodiment of the present invention.

  The lower limit of the preferable content of the compound represented by the formula (L-9) to the total amount of the composition is 1%, 2%, 3%, 5%, 7 % And 10%. The upper limit of the preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6% with respect to the total amount of the composition. Yes, 5% and 3%.

When obtaining a high birefringence highly effective when larger amount to set the content, on the contrary, when importance is attached to high T _NI highly effective when fewer to set the content. Furthermore, in the case of improving the drop marks and the sticking characteristic, it is preferable to set the range of the content in the middle.

  Furthermore, the compound represented by General Formula (L-9) is preferably a compound selected from the group of compounds represented by Formula (L-9.1) to Formula (L-9.4).

  The lower limit of the preferable content of the total of the compounds represented by General Formula (i), General Formulas (L) and (J) with respect to the total amount of the composition is 80%, 85%. 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, It is 100%. The upper limit of the preferred content is 100%, 99%, 98% and 95%. However, from the viewpoint of obtaining a composition having a large absolute value of Δε, it is preferable that one of the compounds represented by General Formula (J) is 0%.

  The total of the compounds represented by general formula (i), general formulas (L-1) to (L-7) and general formulas (M-1) to (M-9) relative to the total amount of the composition The lower limit value of the preferable content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96% , 97%, 98%, 99% and 100%. The upper limit of the preferred content is 100%, 99%, 98% and 95%.

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

  When importance is placed on the reliability and long-term stability of the composition, 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. Preferably, it is more preferably 1% or less, and most preferably substantially free.

  When importance is placed on stability due to UV irradiation, the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, based on the total mass of the composition. % Is preferable, 5% or less is more preferable, 3% or less is preferable, and substantially no content is further preferable.

  It is preferable to increase the content of compounds in which all ring structures in the molecule are six-membered rings, and the content of compounds in which all ring structures in the molecule are six-membered rings is 80 based on the total mass of the composition. % Or more is preferable, 90% or more is more preferable, 95% or more is more preferable, and the composition is composed only of compounds in which all ring structures in the molecule are substantially 6-membered rings. Most preferred.

  In order to suppress deterioration due to oxidation of the composition, 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 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 even more preferably substantially non-containing.

In the case of focusing on the improvement of viscosity and improvement of T _NI , the content of a compound having a 2-methylbenzene-1,4-diyl group in which the hydrogen atom may be substituted by halogen in the molecule is reduced. The content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, and more preferably 8% or less based on the total mass of the composition. The content is preferably 5% or less, more preferably 3% or less, and even more preferably substantially non-containing.

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

  When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when 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. Preferably not.

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, but the lower limit is preferably 10, 10.5 is preferred, 11 is preferred and 11.5 is preferred. , 12 is preferable, 12.3 is preferable, 12.5 is preferable, 12.8 is preferable, 13 is preferable, 13.3 is preferable, 13.5 is preferable, 13.8 is preferable, 14 is preferable, 14 3 is preferable, 14.5 is preferable, 14.8 is preferable, 15 is preferable, 15.3 is preferable, 15.5 is preferable, 15.8 is preferable, 16 is preferable, 16.3 is preferable, 16 5 is preferable, 16.8 is preferable, 17 is preferable, 17.3 is preferable, 17.5 is preferable, 17.8 is preferable, and 18 is preferable, and the upper limit thereof is 25 is preferable, 24.5 is preferable, 24 is preferable, 23.5 is preferable, 23 is preferable, 22.8 is preferable, 22.5 is preferable, 22.3 is preferable, 22 is preferable, 21.8 is 21.5 is preferable, 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, and 19.5 is 19.3 is preferable, 19 is preferable, 18.8 is preferable, 18.5 is preferable, 18.3 is preferable, 18 is preferable, 17.8 is preferable, 17.5 is preferable, 17.3 is Preferably, 17 is preferable. When importance is given to reducing power consumption, it is effective to reduce the amount of light from the backlight, and it is preferable to improve the light transmittance of the liquid crystal display element. For that purpose, the value of K _AVG should be set lower. preferable. When emphasis is placed on improvement of response speed, it is preferable to set the value of K _AVG higher.
(Polymerizable compound having a mesogenic group)
The polymerizable compound having a mesogenic group according to the present invention is a compound represented by the above general formula (i)

It is represented by.

In General Formula (i), P ⁱ¹ represents a polymerizable functional group, and specific examples of the polymerizable functional group include groups represented by the following Formula (P-1) to Formula (P-15) Be

Among them, P ⁱ¹ is preferably (P-1), (P-2) or (P-3).

Sp ⁱ¹ is preferably a single bond or an alkylene group having 1 to 15 carbon atoms in which one or two or more adjacent non-adjacent —CH ₂ — groups may be substituted by —O—, and a single bond or a carbon number More preferably, it is an alkylene group of 1 to 10.

R ⁱ¹ is -Sp ⁱ¹ -P ⁱ¹ , a hydrogen atom, an alkyl group having 1 to 8 carbon atoms in which a hydrogen atom may be substituted by a halogen atom, a carbon atom number in which a hydrogen atom may be substituted by a halogen atom It is preferable to represent 1 to 8 alkoxy groups. From easy polymerizable compound readily form polymer network point of ^{view, R i1} is ^-Sp i1 ^-P preferably representing the ^i1, the general formula (i) in the another ^-Sp i1 ^{-P i1} same as It is more preferred to represent a group.
A ⁱ¹ , A ⁱ² and A ⁱ³ are each independently
(A) trans-1,4-cyclohexylene group,
(B) phenylene group (wherein the hydrogen atoms contained in this group are each independently unsubstituted or the hydrogen atom is a fluorine atom, a chlorine atom, a C 1-8 alkyl group, a C 1 -C 1 atom) H.sup.8 halogenated alkyl group, a halogenated alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or optionally substituted by -Sp ⁱ¹ -P ⁱ¹ ), and (c) cyclohexenyl It is preferable to represent a group selected from the group consisting of a lene group, a naphthalene group, a decahydronaphthalene group and a tetrahydronaphthalene group,
(B) phenylene group (wherein the hydrogen atoms contained in this group are each independently unsubstituted or the hydrogen atom contained in these groups is a fluorine atom, a chlorine atom, an alkyl group having 1 to 8 carbon atoms) And more preferably represents a group selected from the group consisting of (c) a naphthalene group,
That the hydrogen atoms are each independently unsubstituted or a hydrogen atom contained in these groups is a fluorine atom, a chlorine atom, or a phenylene group which may be substituted by an alkyl group having 1 to 8 carbon atoms Is more preferred.

Z ⁱ¹ and Z ⁱ² are each independently a single bond, —O—, —OCH ₂ —, —CH ₂ O—, —CO—, —C ₂ H ₄ — from the viewpoint of forming a stable mesogenic group. _{, -COO -, - OCO -,} - OCOOCH 2 -, - CH 2 OCOO -, - CO -, - CH = CH-COO -, - OOC-CH = CH -, - COOC 2 H 4 -, - OCOC 2 _{H 4 -, - C 2 H} 4 OCO -, - C 2 H 4 COO -, - OCOCH 2 -, - CH 2 COO -, - CH = CH -, - CF = CH -, - CH = CF -, - _{CF 2 -, - CF 2 O} -, - OCF 2 -, - CF 2 CH 2 -, - CH 2 CF 2 - or _-CF 2 CF ₂ - is preferable to represent a single bond, -O -, - OCH _{2 -, - CH 2 O -} , - CO -, - C 2 H 4 -, - COO-, _{OCO -, - OCOOCH 2 -,} - CH 2 OCOO -, - CO -, - COOC 2 H 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 H 4 COO -, - OCOCH ₂ - or more preferably representing a _-CH 2 COO-, a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - it is further preferred that represents the COO- or -OCO-.

It is preferable that the compound represented by general formula (i) contains two or more and four or less -Sp ⁱ¹ -P ⁱ¹ groups from the viewpoint of having appropriate polymerization reactivity.

  The polymerizable compound represented by the general formula (i) has a mesogenic group. The polymerizable compound of the present invention, which contains a mesogenic group, exhibits good liquid crystal alignment when added to a liquid crystal composition. However, the compounds represented by the general formula (i) may not exhibit liquid crystal alignment alone.

Here, the mesogenic group are the compounds of formula (i) ^A i1 ^-Z i1 - a structural unit represented by ^{(A i2 -Z i2) n i} -A i3.

  The mesogen group preferably has a skeleton in which two or more ring structures are directly linked from the viewpoint of easily expressing liquid crystallinity, and is more preferably a group containing a biphenyl skeleton or a terphenyl skeleton, with a biphenyl skeleton It is further preferred that

  Specifically, the polymerizable compound represented by the general formula (i) is preferably a compound represented by the following general formulas (i-1) to (i-7).

^{(Wherein, P i11, P i12, P} i21, P i22, P i31, P i32, P i41, P i42, P i51, P i52, P i61, P i62, P i71 and ^{P I72} are each independently And represents a group represented by the above (P-1), (P-2) or (P-3), and Sp ⁱ¹¹ , Sp ⁱ¹² , Sp ⁱ²¹ , Sp ⁱ²² , Sp ⁱ³¹ , Sp ⁱ³² , Sp ⁱ⁴¹ , Sp ⁱ⁴² , Sp ⁱ⁵¹ , Sp ⁱ⁵² , Sp ⁱ⁶¹ , Sp ⁱ⁶² , ^{Spi 71} and ^{Spi 72} are each independently a single bond or one or two or more non-adjacent -CH _2- substituted with -O- It represents an alkylene group having a carbon number of ^{1~15, a i11, a i12,} a i13, a i21, a i22, a i23, a i31, a i32 , ^{Ai 33} , ^{Ai 41} , ^{Ai 42} , ^{Ai 43} , ^{Ai 51} , ^{Ai 52} , ^{Ai 53} , ^{Ai 61} , ^{Ai 62} , ^{Ai 63} , ^{Ai 71} and ^{Ai 72} are each independently
(A) trans-1,4-cyclohexylene group,
(B) phenylene group (wherein the hydrogen atoms contained in this group are each independently unsubstituted or the hydrogen atom is a fluorine atom, a chlorine atom, a C 1-8 alkyl group, a C 1 -C 1 atom) H.sup.8 halogenated alkyl group, a halogenated alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or optionally substituted by -Sp ⁱ¹ -P ⁱ¹ ), and (c) cyclohexenyl This represents a group selected from the group consisting of rene, naphthalene, decahydronaphthalene and tetrahydronaphthalene. )
The polymerizable compound represented by the general formula (i) is one which is activated by irradiation with ultraviolet light. By this, the polymerizable compounds represented by the general formula (i) can be polymerized with each other to form a polymer. As a polymerization method, radical polymerization, anionic polymerization, cationic polymerization and the like can be used, but polymerization by radical polymerization is preferable, and radical polymerization by light fleece rearrangement and radical polymerization by a photopolymerization initiator are more preferable.

As a radical polymerization initiator, although a thermal polymerization initiator or a photoinitiator can be used, a photoinitiator is preferable.
(Complex liquid crystal composition)
The phase separation liquid crystal layer according to the present invention can be formed using a composite liquid crystal composition containing the above liquid crystal composition and the polymerizable compound represented by the general formula (i).

  The composite liquid crystal composition is formulated to be a liquid crystal phase stably at least in a specific temperature range, and is preferably a liquid crystal phase at normal temperature.

  The lower limit of the content of the polymerizable compound represented by the general formula (i) in 100% by mass of the composite liquid crystal composition is preferably 2% by mass or more from the viewpoint of obtaining high-speed response of the liquid crystal device obtained. The content is more preferably 4% by mass or more, further preferably 6% by mass or more, particularly preferably 8% by mass or more, and from the viewpoint of lowering the driving voltage of the liquid crystal element to be obtained, the upper limit is 20%. % Or less is preferable, 18% by mass or less is more preferable, 16% by mass or less is more preferable, and 14% by mass or less is particularly preferable.

  The composite liquid crystal composition may contain other optional components, as long as the object of the present invention is not impaired.

Examples of the optional component include a radical polymerization initiator, and a chain polymerizable compound represented by the following general formula (ii).
(Phase separation liquid crystal layer)
A phase separation liquid crystal layer can be formed by polymerizing the polymerizable compound in the composite liquid crystal composition in a state in which the composite liquid crystal composition exhibits a liquid crystal phase. At this time, it is preferable that the liquid crystal composition and the polymer be gradually phase-separated due to the progress of the polymerization reaction. In the phase separation liquid crystal layer thus obtained, the polymer forms a dense polymer network in the phase, and can exert high alignment control power to liquid crystal molecules in the phase.

  In ultraviolet polymerization, the reaction rate at the time of polymerization may be appropriately adjusted in accordance with the type and content of the functional group of the polymerizable compound and the photoinitiator, and the ultraviolet light exposure intensity. The ultraviolet exposure intensity is preferably at least 2 mW / cm 2 or more from the viewpoint of obtaining a sufficient reaction rate.

  When the content of the polymerizable compound in the composite liquid crystal composition is increased, phase separation may occur in the composition. In this case, it is preferable to adopt temperature conditions in which the composite liquid crystal composition has a homogeneous phase at least at the start of polymerization.

The ultraviolet curing of the polymerizable compound in the composite liquid crystal composition is preferably performed in a state in which the composite liquid crystal composition is sandwiched between hollow elements described later. Thus, the liquid crystal element can be efficiently manufactured.
(Oriented polymer)
The polymer in the phase separation liquid crystal layer contains a mesogenic group derived from the polymerizable compound represented by the general formula (i). Here, the mesogen group group contained in the orientation polymer has a certain orientation. In the present specification, a polymer containing such an orientation state mesogen group group is referred to as an oriented polymer.

  The degree of orientation of the mesogen group is not particularly limited, but it is preferable that the orientation polymer is oriented to such an extent that a certain refractive index anisotropy is exhibited.

  The alignment polymer in the liquid crystal device of the present invention is obtained by curing the above-mentioned composite liquid crystal composition under ultraviolet light under the alignment control power of the homogeneous alignment film. Therefore, in the liquid crystal device of the present invention, the liquid crystal molecules and the mesogen group group in the alignment polymer are homogeneously aligned in the same direction.

The oriented polymer may be a homopolymer consisting of only one monomer unit derived from the polymerizable compound represented by the general formula (i), and it may be a polymerizable compound represented by the general formula (i) It may be a copolymer containing two or more types of monomer units derived from it. Furthermore, the oriented polymer may contain a monomer unit derived from a polymerizable compound other than the polymerizable compound represented by the general formula (i). When the oriented polymer contains a monomer unit derived from a polymerizable compound other than the polymerizable compound represented by the general formula (i), a monomer derived from the polymerizable compound represented by the general formula (i) The content of the unit is preferably 30% by weight or more, more preferably 40% by weight or more, and still more preferably 50% by weight or more, from the viewpoint of expressing high refractive index anisotropy. It is particularly preferable that the content is 60% by weight or more.
(Chain polymerizable compound)
The above-mentioned oriented polymer, together with the polymerizable compound represented by the general formula (i), has the following general formula (ii)

(Wherein P ⁱⁱ¹ represents a polymerizable functional group, and R ⁱⁱ¹ represents a single bond or an alkylene group having 1 to 9 carbon atoms, but one or more -CH _2- in the alkylene group is And each of the oxygen atoms may be independently substituted with -O-, -CO-, -COO- or -OCO- so that the oxygen atoms are not directly adjacent to each other, and one or more present in the alkylene group The hydrogen atoms may be each independently substituted with a fluorine atom, and R ⁱⁱ² and R ⁱⁱ³ each independently represent a hydrogen atom or an alkyl group having 1 to ²¹ carbon atoms, and One or more -CH ₂ -may be each independently substituted with -O-, -CO-, -COO- or -OCO- such that the oxygen atom is not directly adjacent, and the alkyl One or more of the groups present Atom is, P ^{ii2 independently,} a fluorine atom, an alkyl group having 1 to 8 carbon atoms, may be substituted with a halogenated alkyl group having 1 to 8 carbon atoms, if P ⁱⁱ¹ there are multiple Copolymers and / or polymer mixtures obtained by UV curing of one or more of the chain polymerizable compounds represented by Is preferred.

  The above-mentioned copolymer contains both a monomer unit derived from the polymerizable compound represented by the general formula (i) and a monomer unit derived from the chain polymerizable compound. The orientation polymer preferably contains the above-described copolymer from the viewpoint of easily reducing the driving voltage of the liquid crystal element to be obtained.

  The copolymer and / or polymer mixture can be easily obtained by ultraviolet curing of the polymerizable composition containing a chain polymerizable compound. From this viewpoint, the polymerizable composition preferably contains a chain polymerizable compound. Moreover, the polymerization reaction rate of the polymerizable composition can be improved by using the polymerizable compound represented by the general formula (i) and the chain polymerizable compound in combination. Further, the polymerizable composition may contain a chain polymerizable compound other than the chain polymerizable compound represented by the general formula (ii).

In General Formula (ii), P ⁱⁱ¹ represents a polymerizable functional group, and specific examples thereof include the same groups as the above P ⁱ¹ . Among them, P ⁱⁱ¹ is preferably (P-1), (P-2) or (P-3).

R ⁱⁱ¹ is preferably an alkylene group having 1 to 6 carbon atoms, and more preferably an alkylene group having 1 to 3 carbon atoms.

^Each of R ⁱⁱ² and R ⁱⁱ³ may be independently a hydrogen atom or one or more non-adjacent -CH ₂ -may be substituted by -O-, and one or more hydrogen atoms may be each independently It is preferable to independently represent an alkyl group having 1 to ²¹ carbon atoms which may be substituted by P ⁱⁱ 2, and one or more hydrogen atoms may be independently substituted by P ^{ii 2} More preferably, it represents an alkyl group having 3 to 16 carbon atoms, and one or two or more hydrogen atoms each independently represent an alkyl group having 5 to 11 carbon atoms which may be substituted with P ^{ii 2} Are more preferable, and it is particularly preferable to represent an alkyl group having 5 to 11 carbon atoms.

The total number of carbon atoms contained in each of R ⁱⁱ¹ , R ⁱⁱ² and R ⁱⁱ³ is preferably 3 to 30, more preferably 4 to 28, and still more preferably 5 to 26, It is more preferably 24 and particularly preferably 7 to 22.

  Further, the above-mentioned oriented polymer, together with the polymerizable compound represented by the general formula (i), has the following general formula (iii)

( ^Wherein , P ⁱⁱⁱ¹ and P ⁱⁱⁱ² each independently represent (P-1), (P-2) or (P-3), R ⁱⁱⁱ¹ represents an alkylene group having 1 to 6 carbon atoms, R ⁱⁱⁱ² represents an alkylene group having 1 to 4 carbon atoms, R ⁱⁱⁱ³ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and n ⁱⁱⁱ¹ represents an integer of 1 to 15)
It is preferable that it is a copolymer and / or polymer mixture obtained by carrying out the ultraviolet curing of 1 type, or 2 or more types of the chain | strand-shaped polymerizable compound represented by these.

In General Formula (iii), n ^{ii 11} preferably represents an integer of 2 to 12, more preferably an integer of 3 to 10, and still more preferably an integer of 4 to 8. In the present invention, when the polymerizable compound represented by the general formula (iii) is used, a polymerizable compound in which ⁿⁱ¹¹ in the general formula (iii) represents an integer of 16 or more may be used in combination. In this case, it is preferable to adjust the mean value of ⁿⁱ¹¹ of all the compounds in the range of 3 to 10 for use.
(Liquid crystal element)
The liquid crystal device of the present invention comprises a phase separation liquid crystal layer, a homogeneous alignment film and an electrode.

  Although the specific embodiment is not particularly limited as long as the liquid crystal element of the present invention includes the above-mentioned elements, for example, two transparent substrates having electrodes on at least one side and a homogeneous alignment film are used. The phase separation liquid crystal layer may be sandwiched in the hollow element configured.

  In the liquid crystal element of the present invention, the homogeneous alignment of the phase separation liquid crystal layer is maintained in the absence of power. Therefore, it can be used as an element that can be driven in the so-called reverse mode. That is, the liquid crystal element is in the transmissive state when no voltage is applied, and can be in the non-transmissive state when voltage is applied.

In the liquid crystal device of the present invention, the alignment of liquid crystal molecules is controlled not only by the homogeneous alignment film but also by the dense polymer network made of an alignment polymer. Therefore, the liquid crystal element of the present invention is less likely to cause alignment disorder due to external stress, and has high stress resistance. The liquid crystal element of the present invention is unlikely to cause display defects even under an environment in which bending stress is applied, so that the liquid crystal element can be bent. Therefore, in the liquid crystal element of the present invention, the element surface may be in a phase.
(Homogeneous alignment film)
The homogeneous alignment film may be any one having direct contact with the composite liquid crystal composition or the phase separation liquid crystal layer to induce homogeneous alignment. As such an alignment film, a known one may be used. Usually, the homogeneous alignment films are arranged in a pair so as to sandwich the liquid crystal phase. In the hollow element, the homogeneous alignment film is usually disposed on the surface of each of a pair of opposing substrates.

Examples of the alignment film include a polyimide alignment film, a photo alignment film, and the like. As a method of forming an alignment film, for example, in the case of a polyimide alignment film, a polyimide resin composition is coated on a transparent substrate, thermally cured at a temperature of 180 ° C. or higher, and rubbed with cotton cloth or rayon cloth. Methods are included. In addition, a polymer film such as a polyimide film not subjected to rubbing treatment can also be used.
(electrode)
The electrodes are provided in the liquid crystal device of the present invention so as to generate an electric field capable of controlling the alignment of liquid crystal molecules in the phase separation liquid crystal layer. The electric field strength is controlled by the degree of voltage application to the electrodes.

The shape of the electrode is not particularly limited, and the conductive portion may be in the form of a stripe or a mesh or a random mesh. The electrode is preferably a so-called fish bone structure.
(Transparent substrate)
Glass, a plastic, etc. can be used as a material of the said transparent substrate. From the viewpoint of applying the liquid crystal device of the present invention to a flexible display, the transparent substrate is preferably flexible.
(Production example of liquid crystal element)
From the viewpoint of productivity, the liquid crystal device of the present invention is preferably produced from a polymerizable liquid crystal device in which the composite liquid crystal composition is held in a hollow device. In the polymerizable liquid crystal element, the liquid crystal compound in the composite liquid crystal composition and the polymerizable compound having a mesogenic group are in the homogeneous alignment state due to the alignment control force of the homogeneous alignment film. Under this alignment state, the polymerizable compound in the composite liquid crystal composition is ultraviolet-cured by the above-described method to form a phase separation liquid crystal layer from the composite liquid crystal composition, whereby a liquid crystal element can be obtained.

  The method of holding the composite liquid crystal composition in the hollow element may be a conventional method, and a vacuum injection method or an ODF method can be used. In the polymerizable liquid crystal device manufacturing process of the ODF method, a sealing agent such as an epoxy-based combination heat and light curing property is drawn in a closed loop shape using a dispenser on either the backplane or the front plane of the hollow element. A polymerizable liquid crystal element can be manufactured by bonding a front plane and a back plane after dropping a predetermined amount of the composite liquid crystal composition under deaeration therein. The composite liquid crystal composition used in the present invention can be suitably used in the ODF process since it has high phase stability and is less likely to volatilize.

Hereinafter, preferred embodiments of the liquid crystal element of the present invention will be described using the drawings, but the present invention is not limited to these.
(Vertical electric field type)
The vertical electric field type liquid crystal element is a liquid crystal element in which electrodes are arranged so that an electric field is generated perpendicularly to the homogeneous alignment film. In a vertical electric field liquid crystal device, an electrode is usually provided on both of two transparent substrates sandwiching a phase separation liquid crystal layer. The vertical electric field type liquid crystal element can adopt, for example, a drive mode such as TN, STN, ECB, VA, VA-TN, OCB or the like as a drive mode.

  FIG. 1 is a view schematically showing the configuration of a vertical electric field type liquid crystal element when no voltage is applied. The vertical electric field type liquid crystal device according to the present invention will be described below with reference to FIG.

  The structure of the vertical electric field type liquid crystal device according to the present invention is, as described in FIG. 1, a first substrate 11 and a second substrate 12 provided with transparent electrodes (layers) 2 each made of a transparent conductive material, It has a phase separation liquid crystal layer sandwiched between the first substrate 11 and the second substrate 12, and the alignment of liquid crystal molecules in the phase separation liquid crystal layer when no voltage is applied is to the homogeneous alignment film 3. It is a liquid crystal element which is approximately parallel. The phase separation liquid crystal layer is composed of liquid crystal molecules 4 and an orienting polymer 5 contained in the liquid crystal composition. In FIG. 1, for convenience, the orienting polymer 5 is illustrated by a large number of fixed polymerizable compounds, but in practice, a polymer network in which the respective polymerizable compounds are connected in a complex manner is formed. Furthermore, a pair of homogeneous alignment films 3 are formed on the surface of the transparent electrode (layer) 2 so as to be in direct contact with the phase separation liquid crystal layer.

  That is, the vertical electric field type liquid crystal device according to the present invention comprises the first substrate 11, the electrode 2, the homogeneous alignment film 3, the phase separation liquid crystal layer containing the liquid crystal molecules 4 and the alignment polymer 5, and the homogeneous alignment film. 3, the electrode 2 and the second substrate 12 are sequentially stacked.

  FIG. 2 is a view schematically showing the configuration of the vertical electric field type element at the time of voltage application.

  By applying a voltage to the electrodes, the vertical electric field type liquid crystal element transitions from the state of FIG. 1 to the state of FIG. At this time, the liquid crystal molecules 4 are aligned in the direction perpendicular to the homogeneous alignment film due to the generation of the vertical electric field. In the vertical electric field type liquid crystal device shown in FIG. 2, since the alignment directions of the liquid crystal molecules 4 and the orienting polymer 5 in the phase separation liquid crystal layer are different, light scattering occurs at the interface of each component, and the vertical electric field liquid crystal device The light is in a non-transmissive state.

  As described above, the vertical electric field type liquid crystal device of the present invention can change the transmission state of light depending on the presence or absence of voltage application, so it can be used as a liquid crystal light control device incorporated in a device requiring a light control function. It can be used as a liquid crystal display element to be used. In particular, since the vertical electric field type liquid crystal device of the present invention can be driven in the reverse mode, it is particularly suitable for applications where power saving, transparency at the time of power failure or no power supply is required.

The vertical electric field liquid crystal light control device of the present invention is preferably used, for example, as a light control unit in a building material, a light control glass, a car-mounted smart window or an OLED display. The vertical electric field type liquid crystal display device of the present invention can be used for the same applications as conventional polymer dispersed liquid crystal display devices, and in particular, can be preferably used for a transmission type display, a flexible display and the like.
(Horizontal electric field type)
The transverse electric field type liquid crystal element is a liquid crystal element in which electrodes are arranged so that an electric field is generated in parallel to the homogeneous alignment film. In a vertical electric field liquid crystal device, an electrode is usually provided on one of two transparent substrates sandwiching a phase separation liquid crystal layer. The transverse electric field type liquid crystal element can adopt a drive mode such as IPS or FFS as a drive mode. In the lateral electric field type liquid crystal device, as shown in FIG. 5 described later, the alignment direction of liquid crystal molecules or the direction of alignment control force in the homogeneous alignment film and the extension direction (longitudinal direction) of the electrodes are constant when no voltage is applied. Make an angle. From the viewpoint of obtaining good display contrast, the angle preferably has a lower limit of 30 degrees or more, more preferably 40 degrees or more, still more preferably 50 degrees or more, and 60 degrees or more. It is particularly preferable that the upper limit value is less than 90.

  FIG. 3 is a view schematically showing the configuration of a horizontal electric field type liquid crystal element when no voltage is applied. Hereinafter, with reference to FIG. 3, a liquid crystal element of a lateral electric field type according to the present invention will be described.

  The configuration of the lateral electric field type liquid crystal device according to the present invention is, as described in FIG. 3, a first substrate 11 and a second substrate 12 provided with transparent electrodes (layers) 2 made of transparent conductive materials, It has a phase separation liquid crystal layer sandwiched between the first substrate 11 and the second substrate 12, and the alignment of liquid crystal molecules in the phase separation liquid crystal layer when no voltage is applied is to the homogeneous alignment film 3. It is a liquid crystal element which is approximately parallel. The phase separation liquid crystal layer is composed of liquid crystal molecules 4 and an orienting polymer 5 contained in the liquid crystal composition. In FIG. 3, for convenience, the orienting polymer 5 is illustrated by a large number of immobilized polymerizable compounds, but in practice, a polymer network in which the respective polymerizable compounds are connected in a complicated manner is formed. Furthermore, a pair of homogeneous alignment films 3 are formed on the surface of the transparent electrode (layer) 2 so as to be in direct contact with the phase separation liquid crystal layer. Furthermore, the polarizing plate 6 is disposed on the outside of each of the substrate 11 and the substrate 12 which constitute the liquid crystal element.

  That is, the lateral electric field type liquid crystal device according to the present invention comprises a polarizing plate 6, a first substrate 11, an electrode 2, a homogeneous alignment film 3, a phase separation liquid crystal layer containing liquid crystal molecules 4 and an alignment polymer 5. The homogeneous alignment film 3, the electrode 2, the second substrate 12, and the polarizing plate 6 are sequentially laminated.

  FIG. 4 is a view schematically showing the configuration of a transverse electric field type element at the time of voltage application.

  The application of a voltage to the electrodes causes the in-plane switching liquid crystal element to transition from the state shown in FIG. 3 to the state shown in FIG. Here, in order to clarify the transition of the alignment of the liquid crystal molecules 4, FIGS. 5 and 6 are also shown together showing FIGS. 3 and 4 from the direction perpendicular to the plane of the homogeneous alignment film. At this time, due to the generation of the transverse electric field, the alignment of the liquid crystal molecules 4 is not parallel to the direction of the alignment control force of the homogeneous alignment film from the state (FIG. 5) parallel to the direction of the alignment control force of the homogeneous alignment film. Transition to the normal state (FIG. 6). The transition of the alignment state of the liquid crystal molecules 4 in this way makes it possible to change the phase of the polarized light incident through the polarizing plate 6.

  As described above, the lateral electric field type liquid crystal device of the present invention can change the phase of polarized light depending on the presence or absence of voltage application. Therefore, by combining the device, a polarizing plate, a retardation plate (not shown), etc. It can be used as a liquid crystal display element used for a display for display. At this time, the transverse electric field type liquid crystal device of the present invention can be driven in either the normal mode or the reverse mode by the arrangement of the polarizing plate and the retardation plate.

The lateral electric field type liquid crystal display device of the present invention can be used in the same applications as conventional polymer dispersed liquid crystal display devices, and in particular, can be preferably used for transmissive display, flexible display and the like.
(Other electric field type)
The liquid crystal element of the present invention may adopt other electric field type not clearly classified into the vertical electric field type and the horizontal electric field type. As such an electric field type, a fringe electric field adopted in the FFS drive mode and the like can be mentioned.

  The present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. Also, "%" in the compositions of the following examples and comparative examples means "mass%".

  The detail of each of the evaluation characteristic in each Example and a comparative example is as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: refractive index anisotropy at 298 K Δε: dielectric anisotropy at 298 K T ₀ : light transmittance [%] at zero applied voltage, the size of scattering, the smaller the value, the larger the scattering.

T ₁₀₀ : Light transmittance when the applied voltage is increased and the light transmittance hardly changes [%]
V ₁₀ : Applied voltage [V] when light transmittance is 10% when T ₀ is 0% and T ₁₀₀ is 100%
V ₉₀ : Applied voltage [V] when the light transmittance is 90%
Contrast: T ₀ / T ₁₀₀ or T ₁₀₀ / T ₀
In addition, content of the polymeric compound each component in Table 1 is a value with respect to the polymeric monomer whole quantity (total 100 mass%). Further, in Table 2, the content of each component of each liquid crystal compound in the liquid crystal composition is a value relative to the total liquid crystal composition (total 100% by mass).

The chemical structures of the respective polymerizable compounds in Table 1 are shown below.

The chain compound (B2) in the table is a mixture of the compound represented by the above general formula (B2-1) and the compound represented by the general formula (B2-2), and n in the formula for the whole mixture The average value of ² was adjusted to 7 and used.
Example 1
The total content 9.8 parts by mass of the polymerizable monomer having the content (% by mass) of each component of the polymerizable compound shown in the column of Example 1 in Table 1, 0.2 parts by mass of benzyl dimethyl ketal as a polymerization initiator, The compound liquid crystal composition was prepared by mixing 90 parts by mass of the following liquid crystal composition "LC-1" with the content (mass%) of each component of the compound shown in Table 2.
(LC-1)

The various characteristics of this liquid crystal composition (LC-1) were as follows.

Transition temperature (N-I): 72.7 ° C.
Refractive index anisotropy Δn: 0.168
Dielectric anisotropy Δε: 8.2
A glass cell was prepared in which the cell thickness was 10 μm, an ITO electrode was formed on the surface on the liquid crystal layer side of each of the two sets of substrates, and the rubbing-treated alignment film was disposed antiparallel. The prepared composite liquid crystal composition was injected into the cell by vacuum injection to seal the injection port.

  At this time, when the alignment state in the cell was confirmed, the liquid crystal composition was aligned in the rubbing direction of the alignment film.

  Next, in order to polymerize the polymerizable monomer while keeping the cell at 25 ± 1 ° C., ultraviolet light is irradiated for 60 seconds at an illuminance of 10 mW / cm to form a phase separation liquid crystal layer from the composite liquid crystal composition. A polymer dispersed liquid crystal device was produced. The illuminance of the ultraviolet light was measured using a unimeter UIT-101 with a receiver UVD-365PD manufactured by Ushio Inc. The obtained liquid crystal element maintained transparency.

Next, voltage-transmittance characteristics of the obtained liquid crystal element were measured. In the measurement of the voltage-transmittance characteristics, a device provided with a light projector on one side of the cell and a light receiver on the other side was used, and no polarizing plate was used on the upper and lower sides of the cell. A rectangular wave was applied between the electrodes of the cell, and the voltage was raised stepwise in the interval from 0 V to saturation of the transmittance change, and the transmittance detected by the light receiver was measured by a method of recording.
The transmittances T ₀ and T ₁₀₀ were measured by the above method to determine V ₉₀ . The T ₀ , T ₁₀₀ , the contrast T ₀ / T ₁₀₀ , and the V ₉₀ at this time are shown in Table 2.
[Examples 2 to 4]
A composite liquid crystal was prepared in the same manner as in Example 1, except that the content (% by mass) of each component of the polymerizable compound was changed to 9.8 parts by mass of the total amount of polymerizable monomers of the values shown in Examples 2 to 4 in Table 1, respectively. The composition was prepared, and the voltage-transmittance characteristic of the obtained liquid crystal element was measured.
[Example 5]
The total content (mass%) of each component of the polymerizable compound is 14.7 parts by mass of the total amount of the polymerizable monomer of the value shown in the column of Example 5 of Table 1; IRGACURE 651 (benzyl dimethyl ketal) manufactured by BASF as a polymerization initiator .3 parts by mass and 85 parts by mass of the liquid crystal composition (LC-1) used in Example 1 were mixed. Hereinafter, in the same manner as in Example 1, a composite liquid crystal composition was prepared, and voltage-transmittance characteristics of the obtained liquid crystal element were measured.
[Example 6]
A composite liquid crystal composition was prepared in the same manner as in Example 1 except that 90 parts by mass of the following liquid crystal composition "LC-2" was used instead of the liquid crystal composition "LC-1" in Example 1. The voltage-transmittance characteristics of the obtained liquid crystal element were measured.
(LC-2)

The various characteristics of this liquid crystal composition (LC-2) were as follows.

Transition temperature (N-I): 80.1 ° C
Refractive index anisotropy Δn: 0.194
Dielectric anisotropy Δε: 16.4
[Example 7]
A composite liquid crystal composition was prepared in the same manner as in Example 1, except that 90 parts by mass of the following liquid crystal composition "LC-3" was used instead of the liquid crystal composition "LC-1" in Example 1. The voltage-transmittance characteristics of the liquid crystal element were measured.
(LC-3)

The various characteristics of this liquid crystal composition (LC-3) were as follows.

Transition temperature (N-I): 82.6 ° C.
Refractive index anisotropy Δn: 0.201
Dielectric anisotropy Δε: 7.2
Comparative Example 1
Instead of the liquid crystalline polymerizable compound (A1) in Example 1, as shown in Table 1, “A-400” (polyethylene glycol diacrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) as a chain polymerizable compound (B2) The content (% by mass) of each component of the liquid crystal compound is 14.7 parts by mass, 9.8 parts by mass of the chain polymerizable compound (B1), 0.5 parts by mass of benzyl dimethyl ketal as a polymerization initiator, and The following liquid crystal composition "LC-1" 75 mass parts of the value shown to was used. Subsequently, in the same manner as in Example 1, a composite liquid crystal composition was prepared, and a liquid crystal element was produced. The obtained liquid crystal element was opaque.

From Table 2, each liquid crystal element obtained in Examples 1 to 7 showed a light scattering state at the time of saturation of transmittance change, with the transparent state and the voltage increased at zero electric field. The larger the contrast T ₀ / T ₁₀₀ , the clearer the contrast between transparency and scattering. In each liquid crystal element, the contrast T ₀ / T ₁₀₀ was 7 or more, the drive voltage V ₉₀ was 50 V or less, and practical electro-optical characteristics were obtained. On the other hand, as in Comparative Example 1, when manufacturing a liquid crystal device without using the liquid crystalline polymerizable compound, T ₀ is unmeasurable in zero field. .
[Example 8]
The total content of the polymerizable compound components (% by mass) is 2.94 parts by mass of the total amount of the polymerizable monomers of the value shown in Example 8 in Table 1 as a polymerization initiator, Irgacure 651 (benzyl dimethyl ketal) made by BASF as a polymerization initiator 0.06 A composite liquid crystal composition was prepared by mixing, by mass, 97 parts by mass of the liquid crystal composition (LC-1) used in Example 1.

  An IPS mode comb electrode of ITO is formed on the liquid crystal layer side of one of the two substrates in which the cell thickness is 3.3 μm, and rubbing is performed in a direction substantially parallel to the electrode lines of the comb electrode. A glass cell was prepared in which the obtained alignment film was disposed antiparallel. The prepared composite liquid crystal composition was injected into the cell by vacuum injection to seal the injection port. At this time, when the alignment state in the cell was confirmed, the liquid crystal composition was aligned in the rubbing direction of the alignment film.

Then, in order to polymerize the polymerizable monomer while keeping the cell at 25 ± 1 ° C., ultraviolet light is irradiated for 60 seconds at an illuminance of 10 mW / cm ² to form a phase separation liquid crystal layer from the composite liquid crystal composition. A polymer dispersed liquid crystal device was produced. The illuminance of the ultraviolet light was measured using a unimeter UIT-101 with a receiver UVD-365PD manufactured by Ushio Inc.

  Next, voltage-transmittance characteristics of the obtained liquid crystal element were measured. To measure voltage-transmittance characteristics, use a device with a light projector on one side of the cell and a light receiver on the other side to make the polarization directions perpendicular to each other at the top and bottom of the cell. And the rotation angles of the orthogonally-arranged polarizing plate and the cell were adjusted so that the measurement field of view became the darkest in the state of zero inter-electrode voltage of the cell. A rectangular wave was applied between the electrodes of the cell, and the voltage was raised stepwise in the interval from 0 V to saturation of the transmittance change, and the transmittance detected by the light receiver was measured by a method of recording.

The transmittances T ₀ and T ₁₀₀ were measured by the above method to determine V ₉₀ . Table 3 shows T ₀ , T ₁₀₀ , contrasts T ₁₀₀ / T ₀ , and V ₉₀ at this time.

From Table 3, a liquid crystal polymerizable compound is combined with a liquid crystal composition having a Δn of 0.14 or more and a Δε of 6 and a positive value of 6 or more to prepare a composite liquid crystal composition, antiparallel alignment treatment and IPS comb type When a liquid crystal cell is fabricated by injecting into a cell equipped with an electrode, the liquid crystal cell is measured by sandwiching the liquid crystal cell between polarizing plates in an orthogonal arrangement, the liquid crystal cell is dark at zero electric field, voltage is increased, and light transmittance is saturated showed that. The larger the contrast T ₀ / T ₁₀₀ , the clearer the contrast between transparency and scattering. In particular, by setting the polymerizable monomer to be a mixture of a liquid crystalline polymerizable compound and a chain polymerizable compound, and making the ratio of the liquid crystal composition in the composite liquid crystal composition greater than 80% by mass, the contrast T ₁₀₀ / T ₀ is The driving voltage V ₉₀ was 50 V or less and the practical electro-optical characteristics were obtained.

11 first transparent substrate 12 second transparent substrate 2 electrode 3 homogeneous orientation film 4 liquid crystal molecule 5 orientation polymer 6 polarizing plate 7 orientation control force of homogeneous orientation film

Claims (5)

Comprising a phase-separated liquid crystal layer formed using the composite liquid crystal composition comprising the liquid crystal composition and orientation polymer, a homogeneous alignment film, an electrode, a liquid crystal composition, a positive dielectric anisotropy And the oriented polymer has the general formula (i)

( ^Wherein P ⁱ¹ is the following (P-1), (P-2), and (P-3)

Represents a polymerizable functional group selected from
Sp ⁱ¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, and one or more of —CH ₂ — in the alkylene group is —O—, —CH so that oxygen atoms are not directly adjacent to each other. = CH-, -CO-, -C≡C-, -OCO- or -COO- may be substituted,
R ⁱ¹ is -Sp ⁱ¹ -P ⁱ¹ , a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 15 carbon atoms in which a hydrogen atom may be substituted by a halogen atom, a hydrogen atom is substituted by a halogen atom C1-15 alkoxy group which may be substituted, alkenyl group having 1 to 15 carbon atoms in which hydrogen atom may be substituted by halogen atom, or carbon atom number in which hydrogen atom may be substituted by halogen atom Represents 1 to 15 alkenyloxy groups,
A ⁱ¹ , A ⁱ² and A ⁱ³ are each independently
(A) trans-1,4-cyclohexylene group (one methylene group present in this group or two or more non-adjacent methylene groups may be replaced by -O- or -S-. ),
(B) phenylene group (one -CH = or two or more non-adjacent -CH = present in this group may be replaced by a nitrogen atom), and (c) cyclohexenylene group And a group selected from the group consisting of bicyclo (2.2.2) octylene group, piperidine group, naphthalene group, decahydronaphthalene group and tetrahydronaphthalene group,
One or more hydrogen atoms present in the groups (a), (b) and (c) are each independently a fluorine atom, a chlorine atom, or an alkyl having 1 to 8 carbon atoms. A group, a halogenated alkyl group having 1 to 8 carbon atoms, a halogenated alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or -Sp ⁱ¹ -P ⁱ¹ may be substituted ,
Z ⁱ¹ and ^{Z i2} are each independently a single _{bond, -O -, - S -,} - OCH 2 -, - CH 2 O -, - CO -, - C 2 H 4 -, - COO -, - OCO ^{_{-, - OCOOCH 2 -, -}} CH 2 OCOO -, - CO-NR 11 -, - NR 11 -CO -, - SCH 2 -, - CH 2 S -, - CH = CH-COO -, - OOC-CH _{= CH -, - COOC 2 H} 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 H 4 COO -, - OCOCH 2 -, - CH 2 COO -, - CH = CH- _{, -CF = CH -, - CH} = CF -, - CF 2 -, - CF 2 O -, - OCF 2 -, - CF 2 CH 2 -, - CH 2 CF 2 -, - CF 2 CF 2 - or the expressed ^{(wherein, R 11} represents an alkyl group having a carbon 1~4.) -C≡C-, n Is 0 or 1,
When there are a plurality of -Sp ⁱ¹ -P ⁱ¹ , they may be the same or different. 1) or 2 or more types of polymerizable compounds having a mesogenic group represented by
The following general formula (ii)

( ^Wherein P ⁱⁱ¹ is the following (P-1), (P-2), and (P-3)

Represents a polymerizable functional group selected from
R ⁱⁱ¹ represents a single bond or an alkylene group having 1 to 9 carbon atoms, and one or more of —CH ₂ — in the alkylene group are each independently independent of one another so that oxygen atoms are not directly adjacent to each other— It may be substituted by O-, -CO-, -COO- or -OCO-, and one or more hydrogen atoms present in the alkylene group are each independently substituted by a fluorine atom May be
^Each of R ⁱⁱ² and R ⁱⁱ³ independently represents a hydrogen atom or an alkyl group having 1 to ²¹ carbon atoms, and one or more -CH _2- in the alkyl group is directly adjacent to an oxygen atom And each may be independently substituted with -O-, -CO-, -COO- or -OCO-, and one or more hydrogen atoms present in the alkyl group are each independently And may be substituted by P ⁱⁱ¹ , a fluorine atom, an alkyl group having 1 to 8 carbon atoms, or a halogenated alkyl group having 1 to 8 carbon atoms,
When a plurality of P ⁱⁱ¹ are present, they may be the same or different. Look including the one or more represented by chain polymerizable compound),
The composite liquid crystal composition, the formula of a polymerizable compound represented by (i) are formed by ultraviolet curing a composite liquid crystal composition containing a ratio to be 2 to 20% by weight, and the orientation of polymer A polymer dispersed liquid crystal device in which the mesogenic group of is aligned in the direction of the alignment control force in the homogeneous alignment film. The liquid crystal composition has a general formula (J)

(Wherein, R ^J1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are each independently -CH = CH-,- C≡C—, —O—, —CO—, —COO— or —OCO— may be substituted, n ^J1 represents 0, 1, 2, 3 or 4 and X ^J1 represents a hydrogen atom A fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group, and Z ^J1 and Z ^J2 are each independently in a single _bond, -CH ₂ CH ₂ basis _{-, - (CH 2) 4} -, - OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O -, - COO -, - OCO- or represents ^{-C≡C-, n J1} is 2, 3 or 4 met If A ^J2 there are multiple, they may be the same or different and if a n ^J1 is 2, 3 or 4 Z ^J1 there are multiple, they be the same or different May be
A ^J1 , A ^J2 and A ^J3 are each independently
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = may be replaced by -N =) and (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 1,2 , And one or more non-adjacent -CH = present in the 3,4-tetrahydronaphthalene-2,6-diyl group may be replaced by -N =).
The polymer dispersed liquid crystal device according to claim 1, wherein the compound is a compound represented by the following formula and contains one or more compounds exhibiting positive dielectric anisotropy. The liquid crystal composition has a general formula (L)

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -in the alkyl group are independently of each other It may be substituted by -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 each independently (a) 1,4-cyclohexylene group (one -CH _2- present in this group or two or more non-adjacent -CH _2- May be replaced by -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = is -N May be replaced by =.)
(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 = or two or more non-adjacent —CH = present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group may be replaced by —N =. )
And a group selected from the group consisting of: one or two or more hydrogen atoms present in the groups (a), (b) and (c) above are each independently a cyano group, a fluorine It may be substituted by an atom or a chlorine atom,
Z ^L1 and ^{Z L2} each independently represent a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF 2 _{-, - CF 2 O -,} - CH = N-N = CH -, - CH = CH -, - represents CF = CF- or -C≡C-,
When n ^L1 is 2 or 3 and a plurality of A ^L2 is present, they may be the same or different, and when n ^L1 is 2 or 3 and a plurality of Z ^L2 is present, they may be Are the same as or different from each other, but the compound represented by the general formula (J) is excluded. )
The polymer dispersed liquid crystal device according to claim 2, which contains one or more compounds represented by The polymer dispersed liquid crystal device according to any one of claims 1 to 3, comprising a transparent substrate provided with a homogeneous alignment film and an electrode, wherein the transparent substrate has flexibility. The liquid-crystal light control apparatus using the liquid crystal element of any one of Claims 1-4.

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