CN115851279A - Positive liquid crystal composition with high pretilt angle and application thereof - Google Patents
Positive liquid crystal composition with high pretilt angle and application thereof Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 160
- 239000000203 mixture Substances 0.000 title claims abstract description 62
- 150000001875 compounds Chemical class 0.000 claims abstract description 94
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims abstract description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims description 73
- 125000003342 alkenyl group Chemical group 0.000 claims description 41
- 125000003545 alkoxy group Chemical group 0.000 claims description 41
- 125000000217 alkyl group Chemical group 0.000 claims description 34
- 125000005819 alkenylalkoxy group Chemical group 0.000 claims description 26
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 25
- 125000006701 (C1-C7) alkyl group Chemical group 0.000 claims description 11
- GVNVAWHJIKLAGL-UHFFFAOYSA-N 2-(cyclohexen-1-yl)cyclohexan-1-one Chemical compound O=C1CCCCC1C1=CCCCC1 GVNVAWHJIKLAGL-UHFFFAOYSA-N 0.000 claims description 8
- 101150065749 Churc1 gene Proteins 0.000 claims description 8
- 102100038239 Protein Churchill Human genes 0.000 claims description 8
- -1 cyclopentyl- Chemical group 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 125000002433 cyclopentenyl group Chemical group C1(=CCCC1)* 0.000 claims description 4
- 239000012769 display material Substances 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 description 18
- 238000005259 measurement Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 11
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- 239000011159 matrix material Substances 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 7
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
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- OQXMLPWEDVZNPA-UHFFFAOYSA-N 1,2-dicyclohexylbenzene Chemical group C1CCCCC1C1=CC=CC=C1C1CCCCC1 OQXMLPWEDVZNPA-UHFFFAOYSA-N 0.000 description 1
- GOYDNIKZWGIXJT-UHFFFAOYSA-N 1,2-difluorobenzene Chemical compound FC1=CC=CC=C1F GOYDNIKZWGIXJT-UHFFFAOYSA-N 0.000 description 1
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- OLUVNSGCKHZQJQ-UHFFFAOYSA-N 1-cyclohexyl-4-(4-cyclohexylphenyl)benzene Chemical group C1CCCCC1C1=CC=C(C=2C=CC(=CC=2)C2CCCCC2)C=C1 OLUVNSGCKHZQJQ-UHFFFAOYSA-N 0.000 description 1
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- 125000004786 difluoromethoxy group Chemical group [H]C(F)(F)O* 0.000 description 1
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Abstract
The invention provides a liquid crystal composition and application thereof, wherein the liquid crystal composition comprises at least one component I, at least one component II and/or at least one component III liquid crystal compound, and the liquid crystal composition has a higher pretilt angle, a nematic phase with a wider temperature range and a higher elastic coefficient so as to solve the problems of poor display and the like caused by inclination angle reversion, deflection inequality and the like in the prior art.
Description
Technical Field
The invention relates to the field of liquid crystal materials, in particular to a positive liquid crystal composition with a high pretilt angle and application thereof.
Background
In the 60's of the 20 th century, after RCA company discovered for the first time that the light transmission mode of liquid crystal could be changed by electric stimulation and then released the liquid crystal display technology by applying this property, liquid crystal gradually attracted high attention of people and rapidly developed to various fields. In 1966, after Kevlar fibers were synthesized by dupont using aramid liquid crystal, the liquid crystal material began to be industrially processed. With the rapid development of decades, liquid crystal materials have been widely used in many fields such as display technology, optical storage devices, and solar cells due to their special properties, and the research range is more extensive in many fields such as chemistry, biology, and information science, and they are one of the popular and indispensable new materials in the present society.
With the change of science and technology, the requirements of people on the performance of liquid crystal materials are higher and higher. The following aspects are expected to be the main development of liquid crystal materials in the future: (1) The novel process for preparing the existing liquid crystal material is explored, the generation of byproducts and harmful substances is reduced, and the production cost is reduced; (2) The performance of the existing liquid crystal material is modified, such as reducing the requirement on the environmental temperature, improving the rich color and diversity of the liquid crystal material for display, and the like; (3) The novel functional liquid crystal material is prepared, and the high standard use requirements of multiple fields are met, such as novel liquid crystal materials for display, novel photoelectric liquid crystal storage materials in the field of information engineering, novel medicinal liquid crystal materials in the field of biological engineering and the like.
Liquid crystal displays can be divided into two driving modes, passive matrix (also called passive matrix or simple matrix) and active matrix (also called active matrix). Among them, the active matrix liquid crystal display device forms an image by changing the arrangement of a liquid crystal compound by applying a voltage to change the intensity of light emitted from a backlight, and has been increasingly favored because of its characteristics of high resolution, high contrast, low power, thin profile, and light weight. Active matrix liquid crystal displays can be classified into two types according to active devices: MOS (metal oxide semiconductor) or other diodes on a silicon chip as a substrate; among Thin Film Transistor (Thin Film Transistor-TFT) substrates, the most rapidly developed Thin Film Transistor-liquid crystal display (TFT-LCD) is currently used in display devices such as mobile phones, computers, liquid crystal televisions, and cameras, and is currently the mainstream product in the liquid crystal market.
The liquid crystal molecules are not directly coated on the surface of the light plate glass, but need to be coated on a glass substrate coated with an alignment layer, and the alignment layer plays a role in controlling the arrangement direction of the liquid crystal molecules, so that the liquid crystal molecules can deflect along the same direction in the voltage driving process. If the pretilt angle is smaller, the disturbance of a parasitic electric field easily causes disorder of the arrangement direction of liquid crystal molecules, so that the problems of inclination inversion, deflection nonuniformity and the like are caused, and the defects of reduced contrast, picture residue and the like are caused. Therefore, development of a liquid crystal material with a high pretilt angle is important for improving defects such as contrast reduction and image sticking caused by tilt reversal and deflection unevenness.
Disclosure of Invention
The purpose of the invention is as follows: the invention mainly aims to provide a positive type liquid crystal composition with a high pretilt angle so as to solve the problems of poor display and the like caused by inclination inversion, deflection unevenness and the like in the prior art.
The technical scheme is as follows: the invention provides a liquid crystal composition, which comprises at least one liquid crystal compound of a component I, at least one liquid crystal compound of a component II and/or at least one liquid crystal compound of a component III;
the component I is selected from general formulas I1-I6, and the general formulas I1-I6 are as follows:
in the general formulae I1 to I6, Y 1 Selected from H, F, C, alkyl, alkoxy, alkenyl or alkenylalkoxy of C2-C7, or cyclopentyl substituted by alkyl, alkoxy, alkenyl or alkenylalkoxy of C1-C7, or cyclopentyl of C2-C7;
the component II is selected from general formulas II1-II30, and the general formulas II1-II30 are as follows:
in the general formulae II1 to II30, R 5 、R 6 Each independently selected from H, alkyl having 1 to 7 carbon atoms, alkoxy having 1 to 7 carbon atoms, alkenyl having 2 to 7 carbon atoms, or alkenylalkoxy having 2 to 7 carbon atoms, or cyclopentyl substituted with alkyl having 1 to 7 carbon atoms, alkoxy having 1 to 7 carbon atoms, or alkenyl having 2 to 7 carbon atoms.
The component III is selected from a general formula III1, and the general formula III1 is as follows:
in the general formula III1, Y 2 Is selected from H, F, C, C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy.
According to another aspect of the present invention, there is provided a use of the above liquid crystal composition in a liquid crystal display material or a liquid crystal display device.
Has the beneficial effects that: the liquid crystal composition has higher pretilt angle, higher clearing point and higher elastic coefficient, so as to solve the problems of poor display and the like caused by inclination angle inversion, deflection unevenness and the like in the prior art.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
In order to solve the above problems, in an exemplary embodiment of the present invention, there is provided a liquid crystal composition including at least one liquid crystal compound of component I, at least one liquid crystal compound of component II, and/or at least one liquid crystal compound of component III;
the component I is selected from general formulas I1 to I6, and the general formulas I1 to I6 are as follows:
in the formulae I1 to I6, Y 1 Selected from H, F, C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy;
the component II is selected from general formulas II1-II30, and the general formulas II1-II30 are as follows:
in the general formulae II1 to II30, R 5 、R 6 Each independently selected from H, alkyl having 1 to 7 carbon atoms, alkoxy having 1 to 7 carbon atoms, alkenyl having 2 to 7 carbon atoms, or alkenylalkoxy having 2 to 7 carbon atoms, or cyclopentyl substituted with alkyl having 1 to 7 carbon atoms, alkoxy having 1 to 7 carbon atoms, or alkenyl having 2 to 7 carbon atoms.
The component III is selected from a general formula III1, and the general formula III1 is as follows:
in the general formula III1, Y 2 Is selected from H, F, C, C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy.
The liquid crystal compounds with the structures shown in the general formulas I1-I6 are white in a pure state, are compounds containing dicyclohexyl benzene ring structures, and are easy to follow a PI table because the cyclohexyl groups are more flexible than the benzene ring structuresThe planar alignment layer is aligned, and thus a higher pretilt angle is easily formed. In addition, the general formula I1 and the general formula I4 have higher clearing points, which is beneficial to improving the clearing points of the system; the general formulas I3 and I6 have higher dielectric constants according to the driving voltage formula
It can be known that the driving voltage is in inverse proportion to the dielectric anisotropy delta epsilon value, and the higher the dielectric anisotropy delta epsilon value is, the lower the driving voltage is, which is beneficial to energy saving; the compounds of the general formulas I2 and I5 have proper clearing points and dielectric constants and can be used for adjusting the clearing points and the dielectric constants of systems.
The liquid crystal compounds with the general formulas II1-II3 are white solid or transparent jelly in a pure state, are liquid crystal compounds with weak polarity or non-polarity, are characterized by lower rotational viscosity and lower melting point, have better intersolubility when being mixed with other liquid crystal compounds, can improve the overall viscosity of liquid crystal materials, and are combined according to a voltage driving response time formula
It is known that on And rotational viscosity gamma 1 The values are directly proportional, indicating the rotational viscosity gamma 1 The lower the value, the lower the response time, the faster the response speed.
The liquid crystal compounds with the general formulas II4-II14 are tricyclic and tetracyclic weak polar or nonpolar liquid crystal compounds, are white solids in a pure state, are characterized by higher clearing points and are beneficial to increasing the application temperature range of the liquid crystal composition. The liquid crystal compounds with the general formulas II15-II27 are tricyclic and tetracyclic weakly polar or nonpolar liquid crystal compounds, are white solids in a pure state, have terphenyl or alkynyl benzene structures, are large conjugated system compounds, are favorable for increasing the optical anisotropy delta n value of a system, and generally, the value of the optical path difference d.delta n is preset, so that the higher the delta n value is, the lower the d value is, and the response speed is inversely proportional to the d value, therefore, the addition of the nonpolar liquid crystal compounds II15-II27 to the liquid crystal composition is favorable for improving the response speed. The compounds having the general formulas II28-II30 have higher elastic coefficients, and the response time is inversely proportional to the elastic coefficients, which means that the higher the elastic coefficient value is, the lower the response time is, the faster the response speed is, and therefore, the addition of the above-mentioned nonpolar liquid crystal compounds II28-II30 to the liquid crystal composition is advantageous for increasing the response speed.
The liquid crystal compound with the structure shown in the general formula III is white in a pure material state, is a compound containing a dicyclohexyl biphenyl structure, and is easy to arrange along a PI surface alignment layer due to good flexibility of dicyclohexyl, so that a high pretilt angle is easy to form. In addition, the compound of the general formula III has higher clearing point and dielectric constant, and can be used for adjusting the clearing point and the dielectric constant of a system.
The polar part consisting of the component I and/or the component III is combined with the non-polar part consisting of the compound of the component II, so that the system is easy to adjust to have a higher pretilt angle, and a higher clearing point, a higher elastic coefficient and a proper optical anisotropy value can be obtained.
Furthermore, it will be clear to the skilled person that the above alkyl groups include not only straight chain alkyl groups but also the corresponding branched chain alkyl groups.
In addition to the liquid crystal compounds of the above-mentioned component I, component II and component III, any kind of liquid crystal compounds can be selected according to the purpose to form the liquid crystal composition together with the liquid crystal composition of the present invention, and other additives in the art can be added according to the need. For example, a polymerizable compound, an optically active component and/or a stabilizer may be added in an amount of 0 to 20% by mass.
The above polymerizable compound composition was as follows:
wherein, the first and the second end of the pipe are connected with each other,
—T 1 and-T 2 Each independently represent
Or an epoxy group;
—Q 1 -and-Q 2 -each independently represents a single bond or an alkyl group having 1 to 8 carbon atoms;
—P 1 -and-P 2 -each independently represents a single bond, -O, -CO, -COO-or-OCO-;
k is 0, 1 or 2;
when k is 1, -Z 1 -represents a single bond, -O-, -CO-, -COO-, -OCO-, -CH 2 O—、—OCH 2 —、—C 2 H 4 —、—CF 2 O—、—OCF 2 —、-C≡C-、—CH＝CH—、
When k is 2, -Z 1 Two occurrences in the component, -Z 1 -represents, independently for each occurrence, a single bond, -O-, -CO-, -COO-, -OCO-, -CH 2 O—、—OCH 2 —、—C 2 H 4 —、—CF 2 O—、—OCF 2 —、-C≡C-、—CH＝CH—、
When k is a number of 1, the number of the transition metal,
represents->
wherein-CH on cyclohexyl 2 May be substituted by O, or represents
Wherein = CH-on the phenyl ring may be substituted by N, H on the phenyl ring may be substituted by F, or represents ^ H>
When k is 2, two are included in the composition
I.e. is>
Appears twice in a group>
Is independently at each occurrence->
wherein-CH on cyclohexyl 2 Can be replaced by O or is->
Wherein = CH-on the phenyl ring may be substituted by N, H on the phenyl ring may be substituted by F, or +>
The above optically active component is preferably:
wherein R is 2 ' is a halogenated or unsubstituted alkyl, alkoxy or alkenyl group having 1 to 7 carbon atoms.
The above-mentioned stabilizers are preferably one or more of the compounds having the components VI1 to VI 5:
wherein R is 2 Is an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms or a halogenated alkenyl group having 2 to 7 carbon atoms; the alkyl, alkoxy and alkenyl groups are linear or branched alkyl, alkoxy and alkenyl groups;
In a preferred embodiment of the present application, the liquid crystal composition further comprises 0 to 30% by mass of a polar compound. The polar compound is a positive polarity compound and/or a negative polarity compound, the positive polarity compound is preferably selected from one or more compounds shown in general formulas X1-X95, the negative polarity compound is preferably selected from one or more compounds shown in general formulas IV1-IV78,
wherein the general formulae X1 to X95 are each:
in the general formulae X1 to X95, R 7 Is H, alkyl with 1-7 carbon atoms, alkoxy with 1-7 carbon atoms, alkenyl with 2-7 carbon atoms or alkenylalkoxy with 2-7 carbon atoms, wherein H can be substituted by cyclopentyl or F, CH 2 May be substituted by cyclopentyl, O or F, and adjacent two CHs 2 May not be simultaneously substituted by O; or is cyclopentyl, oxocyclopentyl
Oxymethyl cyclopentyl->
Oxyethyl cyclopentyl->
Or C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy substituted cyclopentyl, oxocyclopentyl, oxomethylcyclopentyl and oxoethylcyclopentyl; or alternatively selectFrom cyclopentenyl, oxocyclopentenyl, oxymethylcyclopentenyl, oxyethylcyclopentenyl, or cyclopentenyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy; r is 8 Is F, OCF 3 ；X 9 、X 10 Each independently selected from H, methyl or F;
wherein the general formulas IV1 to IV78 are respectively:
in the general formulae IV1 to IV78, R 3 And R 4 Each independently is H, alkyl of 1-7 carbon atoms, alkoxy of 1-7 carbon atoms, alkenyl of 2-7 carbon atoms or alkenylalkoxy of 2-7 carbon atoms, or is H or CH 2 An alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkenylalkoxy group having 2 to 7 carbon atoms which is substituted with a cyclopentyl group or F, or a cyclopentyl group substituted with an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; the alkyl with 1 to 7 carbon atoms is-CH 3 、-C 2 H 5 、-C 3 H 7 、-C 4 H 9 、-C 5 H 11 、-C 6 H 13 or-C 7 H 15 (ii) a The alkenyl group having 2 to 7 carbon atoms is preferably-CH =CH 2 、-CH＝CHCH 3 、-CH＝CHC 2 H 5 、-CH＝CHC 3 H 7 、-C 2 H 4 CH＝CH 2 、-C 2 H 4 CH＝CHCH 3 、-C 3 H 6 CH＝CH 2 or-C 3 H 6 CH＝CHCH 3 (ii) a The alkoxy group having 1 to 7 carbon atoms is preferably-OCH 3 、-OC 2 H 5 、-OC 3 H 7 、-OC 4 H 9 、-OC 5 H 11 、-OC 6 H 13 or-OC 7 H 15 (ii) a The C2-7 alkenylalkoxy group is preferably-OCH = CH 2 、-OCH 2 CH＝CH 2 、-OCH 2 CH＝CHCH 3 or-OCH 2 CH＝CHC 2 H 5 。
The content of the liquid crystal compound in the liquid crystal composition can be adjusted according to the performance requirements of the liquid crystal material, and in a preferred embodiment of the invention, the mass fraction of the liquid crystal compound with the component I in the liquid crystal composition is 0.1-70%, preferably 30-70%, the mass fraction of the liquid crystal compound with the component II is 0.1-70%, preferably 0.1-50%, and the mass fraction of the liquid crystal compound with the component III is 0-30%, preferably 0-20%.
The remaining ingredients may be added in accordance with the teachings of the present invention as set forth above. In general, the sum of the percentage contents of the components is 100%.
In yet another exemplary embodiment of the present application, there is provided a use of the above liquid crystal composition in a liquid crystal display device. When the liquid crystal composition is applied to the preparation of a liquid crystal display material or liquid crystal display equipment, the performance of the liquid crystal display material or the liquid crystal display equipment can be obviously improved. The liquid crystal composition is preferably applied in a Twisted Nematic (TN), in-plane switching (IPS) or Fringe Field Switching (FFS) mode of liquid crystal display.
The advantageous effects of the present invention will be further described below with reference to examples and comparative examples.
The following examples, which are given to illustrate the invention without limiting it, relate to the hundredThe component ratios are all mass percent, and the temperature is expressed in centigrade degrees. The measured physicochemical parameters are expressed as follows: t is NI Indicating a clearing point; Δ n denotes optical anisotropy (Δ n = n) e -n o 589nm, measurement temperature 25 ℃); Δ ε represents the dielectric anisotropy (Δ ε = ε) || -ε ⊥ ，25℃)；k 11 Expressing the coefficient of elasticity of the splay (measurement temperature 25 ℃); gamma ray 1 Denotes rotational viscosity (measurement temperature 25 ℃), PTA denotes pretilt angle, and T is measured by DSC NI (ii) a Measuring delta n by using an abbe refractometer; using CV to measure Deltaε, k 11 And gamma 1 The PTA was measured by using an Otsuka Rets-100.
In various embodiments of the present invention, the liquid crystal molecular backbone is named: cyclohexyl radical
Denoted by the letter C; benzene ring
Denoted by the letter P; ortho-dielectric difluorobenzene->
Denoted by U; tetrahydropyran->
Represented by J; difluoromethoxy bridged-CF 2 O-is represented by Q; alkynyl-C ≡ C-is represented by G; monofluorobenzene->
Denoted by the letter H1.
The corresponding code for the specific group structure is shown in table 1:
TABLE 1
The individual compound branches are converted to chemical formulas according to table 2 below, with the left side branch represented by R1 and the right side branch represented by R2. Wherein, the group C n H 2n+1 And C m H 2m+1 Is a straight-chain alkyl radical having n and m carbon atoms, respectively, cp representing a cyclopentyl group
C n H 2n+1 Cp represents a cyclopentyl group having a straight-chain alkyl group of n carbon atoms. The main chain is separated from branches and branch from branch by "-", named after the preceding branch, e.g. in combination with>
Indicated as CCU-2-F,
expressed in CCEH1-3-F, is>
Is expressed as CC-3-V,
expressed in CCP-3-2, is>
Expressed as PH1UQU-3Cp-F, is>
Denoted CCPU-3-F.
TABLE 2
Example 1
The composition of the liquid crystal composition of example 1 and the measurement parameters are shown in Table 3.
TABLE 3
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, no. 9 is liquid crystal compound of component II, and Nos. 10 to 11 are liquid crystal compounds of component III.
Example 2
The composition of the liquid crystal composition of example 2 and the measurement parameters are shown in Table 4.
TABLE 4
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, and Nos. 9 to 11 are liquid crystal compounds of component II.
Example 3
The composition of the liquid crystal composition of example 3 and the measurement parameters are shown in Table 5.
TABLE 5
Wherein Nos. 1 to 8 are liquid crystal compounds of the component I, and Nos. 9 to 11 are liquid crystal compounds of the component II.
Example 4
The composition of the liquid crystal composition of example 4 and the measurement parameters are shown in Table 6.
TABLE 6
Wherein the numbers 1 to 8 are liquid crystal compounds of the component I, and the numbers 9 to 10 are liquid crystal compounds of the component II.
Example 5
The composition of the liquid crystal composition of example 5 and the measurement parameters are shown in Table 7.
TABLE 7
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, no. 10 is liquid crystal compound of component II, and Nos. 11 to 12 are liquid crystal compounds of component III.
Example 6
The composition of the liquid crystal composition of example 6 and the measurement parameters are shown in Table 8.
TABLE 8
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, no. 9 is liquid crystal compound of component II, and Nos. 10 to 11 are liquid crystal compounds of component III.
Example 7
The composition of the liquid crystal composition of example 7 and the measurement parameters are shown in Table 9.
TABLE 9
Wherein, the numbers 1 to 8 are the liquid crystal compounds of the component I, the numbers 9 to 11 are the liquid crystal compounds of the component II, and the numbers 12 to 13 are the liquid crystal compounds of the component III.
Example 8
The composition of the liquid crystal composition of example 8 and the measurement parameters are shown in Table 10.
Watch 10
Wherein, the numbers 1 to 8 are the liquid crystal compounds of the component I, the numbers 8 to 9 are the liquid crystal compounds of the component II, and the numbers 10 to 11 are the liquid crystal compounds of the component III.
Example 9
The composition of the liquid crystal composition of example 9 and the measurement parameters are shown in Table 11.
TABLE 11
Wherein, the numbers 1 to 8 are the liquid crystal compounds of the component I, the numbers 9 to 10 are the liquid crystal compounds of the component II, and the numbers 11 to 12 are the liquid crystal compounds of the component III.
Example 10
The composition of the liquid crystal composition of example 10 and the measurement parameters are shown in Table 12.
TABLE 12
Wherein Nos. 1 to 8 are liquid crystal compounds of component I, no. 9 is liquid crystal compound of component II, and Nos. 10 to 11 are liquid crystal compounds of component III.
Comparative example 1
The composition of the liquid crystal composition of comparative example 1 and the measurement parameters are shown in Table 13.
Watch 13
Comparative example 2
The composition of the liquid crystal composition of comparative example 2 and the measurement parameters are shown in Table 14.
TABLE 14
Comparative example 1 does not contain the liquid crystal compound of component I, but instead contains a monocyclohexyl-linked biphenyl-based positive polarity liquid crystal compound (CPH 1-3-F, CPP-3-F, CPU-3-F, etc.) as compared to examples 1-10, and the liquid crystal composition of comparative example 1 has a clearing point lower by at least 18%, a splay elastic coefficient lower by at least 18% as compared to examples 1-10, and a pretilt angle smaller by at least 31% as compared to each example;
compared with the examples 1-10, the mass fraction of the liquid crystal compound of the component I in the comparative example 2 is 17%, and the mass fractions of the component I in the examples 1-10 are all more than 50%; the liquid crystal compound replacing part of the component I in the comparative example 2 is a monocyclic hexyl-linked biphenyl positive polarity liquid crystal compound (CPP-3-F, CPU-3-F and the like); the liquid crystal composition of comparative example 2 had a clearing point and a splay modulus of elasticity less than the lowest values of examples 1 to 10, while its pretilt angle was at least 21% smaller.
From the comparison of the above examples with comparative examples, it can be found that when a higher proportion of the liquid crystal compound of component I is used in combination with a certain proportion of component II and/or component III, a positive type liquid crystal composition having a high clearing point, a higher splay modulus and a high pretilt angle can be obtained. The high-definition bright point is beneficial to increasing the use temperature range of the liquid crystal composition, the higher splay elastic coefficient is beneficial to improving the response speed of the liquid crystal material, and the high pretilt angle is beneficial to improving the problems of poor display of a liquid crystal display and the like caused by inclination inversion, uneven deflection and the like of the liquid crystal composition. The above measurement parameters are related to the physicochemical properties of all liquid crystal compounds constituting the liquid crystal medium, and the liquid crystal composition of the present invention is mainly used for adjusting the liquid crystal parameters of the system.
Although the present invention is not exhaustive of all liquid crystal compositions claimed, it is anticipated by those skilled in the art that other similar materials can be obtained in a similar manner without creative efforts based on the disclosed embodiments, only by combining with their own professional trials. And are merely representative of embodiments, given the limited space available.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A liquid crystal composition, characterized in that it comprises at least one liquid crystal compound of component I, at least one liquid crystal compound of component II and/or at least one liquid crystal compound of component III;
the component I is selected from general formulas I1 to I6, and the general formulas I1 to I6 are as follows:
in the general formulae I1 to I6, Y 1 Selected from H, F, C, alkyl, alkoxy, alkenyl or alkenylalkoxy of C2-C7, or cyclopentyl substituted by alkyl, alkoxy, alkenyl or alkenylalkoxy of C1-C7, or cyclopentyl of C2-C7;
the component II is selected from general formulas II1-II30, and the general formulas II1-II30 are as follows:
in the general formulae II1 to II30, R 5 、R 6 Each independently selected from H, alkyl with 1-7 carbon atoms, alkoxy with 1-7 carbon atoms, and carbon atomAn alkenyl group having 2 to 7 carbon atoms or an alkenylalkoxy group having 2 to 7 carbon atoms, or a cyclopentyl group substituted with an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms;
the component III is selected from a general formula III1, and the general formula III1 is as follows:
in the general formula III1, Y 2 Is selected from H, F, C, C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy.
2. The liquid crystal composition according to claim 1, wherein the liquid crystal compound of component I is 0.1-70% by mass, the liquid crystal compound of component II is 0.1-70% by mass, and the liquid crystal compound of component III is 0-30% by mass.
3. The liquid crystal composition according to claim 2, wherein the liquid crystal compound of component I is present in an amount of 30 to 70% by mass, the liquid crystal compound of component II is present in an amount of 0.1 to 50% by mass, and the liquid crystal compound of component III is present in an amount of 0 to 20% by mass.
4. The liquid crystal composition according to any one of claims 1 to 3, further comprising a polar compound in an amount of 0 to 30% by mass.
5. The liquid crystal composition of claim 4, wherein the polar compound is a positive polarity compound selected from one or more compounds represented by the general formulas X1 to X95 and/or a negative polarity compound selected from one or more compounds represented by the general formulas IV1 to IV78,
wherein the general formulas X1 to X95 are respectively:
in the general formulae X1 to X95, R 7 Is H, alkyl with 1-7 carbon atoms, alkoxy with 1-7 carbon atoms, alkenyl with 2-7 carbon atoms or alkenylalkoxy with 2-7 carbon atoms, wherein H can be substituted by cyclopentyl or F, CH 2 May be substituted by cyclopentyl, O or F, and adjacent two CH groups 2 May not be simultaneously substituted by O; or is cyclopentyl, oxocyclopentyl
Oxymethyl cyclopentyl->
Oxyethyl cyclopentyl->
Or is C1-C7 alkylC1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy substituted cyclopentyl, oxocyclopentyl, oxomethylcyclopentyl, oxoethylcyclopentyl; or is selected from cyclopentenyl, oxocyclopentenyl, oxymethylcyclopentenyl, oxyethylcyclopentenyl, or C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy-substituted cyclopentenyl, oxocyclopentenyl, oxymethylcyclopentenyl, oxyethylcyclopentenyl; r is 8 Is F, OCF 3 ；X 9 、X 10 Each independently selected from H, methyl or F;
wherein the general formulas IV1 to IV78 are respectively:
in the general formulae IV1 to IV78, R 3 And R 4 Each independently is H, alkyl of 1-7 carbon atoms, alkoxy of 1-7 carbon atoms, alkenyl of 2-7 carbon atoms or alkenylalkoxy of 2-7 carbon atoms, or is H or CH 2 An alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms or an alkenylalkoxy group having 2 to 7 carbon atoms, which is substituted with a cyclopentyl group or F, or a cyclopentyl group, which is substituted with an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; the alkyl with 1 to 7 carbon atoms is-CH 3 、-C 2 H 5 、-C 3 H 7 、-C 4 H 9 、-C 5 H 11 、-C 6 H 13 or-C 7 H 15 (ii) a The alkenyl group having 2 to 7 carbon atoms is preferably-CH = CH 2 、-CH＝CHCH 3 、-CH＝CHC 2 H 5 、-CH＝CHC 3 H 7 、-C 2 H 4 CH＝CH 2 、-C 2 H 4 CH＝CHCH 3 、-C 3 H 6 CH＝CH 2 or-C 3 H 6 CH＝CHCH 3 (ii) a The alkoxy group having 1 to 7 carbon atoms is preferably-OCH 3 、-OC 2 H 5 、-OC 3 H 7 、-OC 4 H 9 、-OC 5 H 11 、-OC 6 H 13 or-OC 7 H 15 (ii) a The C2-7 alkenylalkoxy group is preferably-OCH = CH 2 、-OCH 2 CH＝CH 2 、-OCH 2 CH＝CHCH 3 or-OCH 2 CH＝CHC 2 H 5 。
6. The liquid crystal composition according to any one of claims 1 to 5, further comprising 0 to 20 mass% of a stabilizer, wherein the stabilizer is one or more compounds having components VI1 to VI 5:
wherein R is 2 Is an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms or a halogenated alkenyl group having 2 to 7 carbon atoms; the alkyl, the alkoxy and the alkenyl are linear or branched alkyl, alkoxy and alkenyl;
7. Use of the liquid crystal composition of any one of claims 1 to 6 in a liquid crystal display material or a liquid crystal display device.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09176645A (en) * | 1995-12-27 | 1997-07-08 | Chisso Corp | Liquid crystal display and liquid crystal composition |
| CN101031631A (en) * | 2004-10-04 | 2007-09-05 | 智索株式会社 | Liquid crystal composition and liquid crystal display element |
| CN103555348A (en) * | 2013-11-07 | 2014-02-05 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition and application thereof |
| CN103740377A (en) * | 2013-12-27 | 2014-04-23 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and application thereof |
| CN104087312A (en) * | 2014-06-17 | 2014-10-08 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and its application |
| CN110582552A (en) * | 2017-04-27 | 2019-12-17 | 默克专利股份有限公司 | Liquid-crystalline medium |
-
2021
- 2021-09-23 CN CN202111115141.4A patent/CN115851279A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09176645A (en) * | 1995-12-27 | 1997-07-08 | Chisso Corp | Liquid crystal display and liquid crystal composition |
| CN101031631A (en) * | 2004-10-04 | 2007-09-05 | 智索株式会社 | Liquid crystal composition and liquid crystal display element |
| CN103555348A (en) * | 2013-11-07 | 2014-02-05 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition and application thereof |
| CN103740377A (en) * | 2013-12-27 | 2014-04-23 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and application thereof |
| CN104087312A (en) * | 2014-06-17 | 2014-10-08 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and its application |
| CN110582552A (en) * | 2017-04-27 | 2019-12-17 | 默克专利股份有限公司 | Liquid-crystalline medium |
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