CN106957661A - Liquid-crystal composition - Google Patents
Liquid-crystal composition Download PDFInfo
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- CN106957661A CN106957661A CN201610873460.4A CN201610873460A CN106957661A CN 106957661 A CN106957661 A CN 106957661A CN 201610873460 A CN201610873460 A CN 201610873460A CN 106957661 A CN106957661 A CN 106957661A
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
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- C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
- C09K2019/0466—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the linking chain being a -CF2O- chain
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- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3019—Cy-Cy-Ph-Ph
Abstract
The present invention relates to a kind of liquid-crystal composition, it includes specific more than four kinds liquid-crystal compounds.The liquid-crystal composition of the present invention can embody in liquid crystal display cells the low image quality characteristic of temperature dependency due to high clearing point and elastic modelling quantity, it is possible to increase brightness.
Description
Technical field
The present invention relates to the liquid-crystal composition with high clearing point and elastic modelling quantity.
Background technology
The single liquid-crystal compounds of liquid crystal preparation is constituted as the organic matter that molecular weight is 200 to 600g/mol or so
Matter, the molecular structure generally with elongated rod shape.The molecular structure of liquid-crystal compounds is divided into maintaining the central group of rectilinear propagation
(core group), the linking group with flexible end group (terminal group) and for special-purpose
(linkage group).Wherein, chain (alkyl, alkoxy, alkenyl etc.) of the end section easily to be bent to one or both sides
Formed and remain flexible, polar group (F, CN, OCF are imported in opposite side or the side chain of central group3Deng) and play regulation and be situated between
The effect of the physical property of the liquid crystal of electric constant etc.
Liquid crystal display cells (LCD) can be divided into TN (Twist according to the characteristic and application mode (pattern) of LCD
Nematic, twisted-nematic), STN (Super-twisted nematic, super twisted nematic), IPS (In-plane
Switching, plane conversion), FFS (Fringe field switching, fringe field switching) and VA (Vertical
Alignment, vertical arrangement) etc. a variety of species.In such diversified liquid crystal display device, with one or two kind of LCD compound
Thing can not possibly meet all for the products such as temperature, dielectric anisotropy, refractive anisotrop and the rotary viscosity of clearing point
Characteristic is sought, is generally mated 7 to 20 kinds of single liquid-crystal compounds to manufacture liquid-crystal composition.To the requirement of such liquid-crystal composition
Material circumstance is as shown in table 1 in general characteristic.
The feature of [table 1] liquid-crystal composition and associated liquid crystal display device
| The requirement physical property of liquid-crystal composition | A reference value | The characteristic of associated liquid crystal display device |
| Low-temperature stability | Less than -20 DEG C | Operating temperature |
| Clearing point (Tc) | More than 70 DEG C | Operating temperature |
| Dielectric anisotropy (Δ ε) | Positive or negative value | Threshold voltage, response time |
| Refractive anisotrop (Δ n) | More than 0.07 | Brightness, cell gap |
| Rotary viscosity (γ 1) | It is as low as possible | Response time |
| Elastic modelling quantity (K11、K22、K33Average value) | 8 to 18pN | Response time, threshold voltage, brightness |
As shown in Table 1 above, it is in the past lasting to require to provide the liquid crystal combination for meeting high clearing point and elastic modelling quantity simultaneously
Thing, and continue to carry out the research to this.Particularly, in terms of the characteristic of the liquid crystal used in liquid crystal display device, if
Clearing point is low, then the poor contrast mutation varied with temperature is big.Particularly, about 50 can be risen in summer ambient outdoor temperature
DEG C, if in this case, using the low liquid crystal of clearing point, can anisotropy diminish and be possible to be difficult to maintain uniform picture
Matter.Thus, in recent years, it is desirable to develop e.g., from about more than 85 DEG C higher of liquid crystal of clearing point.
It is furthermore well known that as shown in following formula 1, the elastic modelling quantity of liquid-crystal composition is bigger, in the response of liquid crystal display cells
It is more favourable in terms of time and video display.
In formula 1, τoffRefer to response time during power supply disconnection (off) in liquid crystal display device, γ1Refer to the rotation of liquid crystal
Turn viscosity, d refers to the interelectrode distance for driving liquid crystal, and Kii refers to elastic modelling quantity.
Particularly, the IPS (In-plane switching, plane conversion) or FFS of transverse electric field driving are being carried out
In the case of (Fringe field switching, fringe field switching) pattern etc., if springform quantitative change is big, brightness also increases
Plus, because, in transverse electric field drive pattern during driving power supply, if elastic modelling quantity is big, make the distortion of liquid crystal minimum
Change, so as to increase the transmissivity in liquid crystal display device.
Thus, it is lasting to require exploitation elastic modelling quantity and the higher liquid-crystal composition of clearing point and using such liquid crystal
Composition and the low image quality characteristic of displays temperature dependence and the liquid that the brightness improved is shown in transverse electric field type of drive
Crystal display element.
The content of the invention
Therefore, the present invention provides the liquid-crystal composition with high clearing point and elastic modelling quantity.
The present invention provides a kind of liquid-crystal composition, its weight of compound 3 to 55 % comprising chemical formula 1, change of chemical formula 2
The weight of compound 2 to 45 %, the weight of compound 3 to 35 % of chemical formula 3 and chemical formula 4 the weight % of compound 1 to 30, and
Clearing point is more than 85 DEG C：
In above-mentioned chemical formula 1 and 2, R1To R3It is each independently the alkyl or carbon number 2 to 7 of carbon number 1 to 7
Alkenyl, ring A1 is cyclohexylidene or phenylene.
Hereinafter, had more for the liquid-crystal composition according to embodiment of the present invention and the liquid crystal display device comprising it
The explanation of body.
As described above, the liquid-crystal composition of an embodiment includes the specific liquid-crystal compounds of chemical formula 1 to 4.
The liquid-crystal composition of such a embodiment by comprising these more than four kinds specific liquid-crystal compounds, from
And with more than 85 DEG C of high clearing point and show higher elastic modelling quantity.The present inventor etc. continues result of study and found：It is logical
Cross and at least mix the liquid-crystal compounds of chemical formula 1 to 4 with optimal proportion, using the teaching of the invention it is possible to provide be not only high limpid with more than 85 DEG C
Point, and show the elastic modelling quantity of known higher level than ever (for example, K11、K22、K33Aggregate value benchmark is at least 32pN
More than) liquid-crystal composition, so as to complete the present invention.Thus, liquid crystal display device comprising above-mentioned liquid-crystal composition although
Outside temperature changes the uniform image quality that be also able to maintain that, and also being capable of display high-brightness under transverse electric field type of drive
Degree.
Hereinafter, more specific description is carried out for each composition of the liquid-crystal composition of such a embodiment.
First, the compound of chemical formula 1 is the liquid-crystal compounds with high dielectric anisotropy, and its rotary viscosity is relative
It is low, and the excellent miscibility with other liquid crystal compositions can be shown And, it is known that general dielectric anisotropy
The tendency that the flexible modulus of high liquid-crystal compounds diminishes, but the compound of chemical formula 1 is different from conventional general knowledge, can show
With more than 30 high dielectric anisotropy and maintain high elastic modulus.In addition, with institute in the composition of an embodiment
Comprising nonpolar, the low-refraction anisotropy composition such as the compound of chemical formula 2 mix well so that liquid-crystal composition
The regulation of the various requirement physical property such as clearing point, refractive anisotrop or rotary viscosity become easy.
The compound of such chemical formula 1 by being included in whole liquid-crystal compositions with 3 to 55 weight % content, from
And the dielectric anisotropy of liquid-crystal composition can be suitably embodied, and suitably control other requirements of such liquid-crystal composition
Physical property.More appropriately, the compound of above-mentioned chemical formula 1 is by including 3 to 40 weight %, it is possible to increase the elasticity of liquid-crystal composition
Modulus and contributing to realizes suitable rotary viscosity and dielectric anisotropy.
On the other hand, as the compound of such chemical formula 1, R can suitably be used1For the alkyl of carbon number 2 to 4
The compound of (for example, ethyl, n-propyl or normal-butyl), the low rotary viscosity thus, it is possible to be easier to realize liquid-crystal composition.
On the other hand, the composition of an embodiment includes the compound of chemical formula 2, thus, it is possible to more carry than ever
The elastic modelling quantity of high liquid-crystal composition.In addition, the compound of above-mentioned chemical formula 2 as show nonpolar and high clearing point into
Point, the clearing point for further improving liquid-crystal composition is can aid in, passes through the combination with the compound of chemical formula 1, energy in addition
The dielectric anisotropy of enough suitably control liquid-crystal compositions.
Thus, high clearing point and springform in order to realize liquid-crystal composition using the compound of chemical formula 2
Amount etc., such compound uses 2 to 45 weight %.More appropriately, in order to prevent the compound because of above-mentioned chemical formula 2 and liquid crystal
The anisotropy control of composition becomes difficult or low-temperature stability decline, and such compound preferably uses 3 to 30 weights
Measure %.
In addition, the high clearing point having from the compound of above-mentioned chemical formula 2 and elastic modelling quantity in terms of, as
The compound of chemical formula 2, can suitably use R2The alkenyl of alkyl or carbon number 2 to 5 for carbon number 3 to 5, R3For carbon
The compound of the alkyl of atomicity 1 to 3.
In addition, in the case of the compound using two or more above-mentioned chemical formula 2, above-mentioned liquid-crystal composition can have more
High clearing point, at the same time can be more beneficial for ensuring low-temperature stability.
On the other hand, the compound of chemical formula 3 has about 7 or so dielectric anisotropy, and the side chain without each ring takes
Dai Ji, therefore, it is possible to contribute to the elastic modelling quantity for further improving liquid-crystal composition.That is, by by the compound of chemical formula 3 with
Suitable proportion is combined with the compound of chemical formula 1 and 2, and dielectric anisotropy can not be made especially to reduce ground and further improve elasticity
Modulus.
Thus, in order to not make the dielectric anisotropy of liquid-crystal composition essentially decreased, and can further improve bullet
Property modulus, the compound of above-mentioned chemical formula 3 can include 3 to 35 weight %, preferably to include 3 to 20 weight %.
And then, the compound of chemical formula 4 can aid in the clearing point for the liquid-crystal composition for remaining higher and can have
Help maintain high-caliber elastic modelling quantity.The compound of such chemical formula 4 due to the high clearing point with about 242 DEG C or so,
Therefore that it is energy in more than 85 DEG C of composition that high temperature, which also maintains the liquid-crystal composition of clearing point, the temperature of particularly clearing point,
Enough play suitable characteristic.
From the such liquid-crystal composition aspect with high clearing point and elastic modelling quantity of offer, above-mentioned chemical formula
4 compound can include 1 to the 30 weight weight of % or 1 to 15 %.
As described above, the liquid-crystal composition of an embodiment is due to by with characteristic different from each other and miscibility is high
The liquid-crystal compounds of chemical formula 1 to 4 is mixed with optimal proportion, therefore, it is possible to high limpid with more than 85 DEG C or 85 to 105 DEG C
Point, and the elastic modelling quantity of known higher level than ever can be shown (for example, K11、K22、K33Aggregate value benchmark is at least
32 or more than 33.5pN).For example, above-mentioned liquid-crystal composition can show equal dielectric anisotropy and can show more
It is 4.0 to 6.0 in dielectric anisotropy, by the splay in 20 DEG C of measure in high elastic modelling quantity, more specifically example
(splay) elastic modelling quantity K11, distortion (twist) elastic modelling quantity K22 and bending (band) elastic modelling quantity K33 total definition
Elastic modelling quantity K adds up to 40.0 to 45.0pN or 40.5 to 43.5pN, or dielectric anisotropy is 8.0 to 10.0, above-mentioned bullet
Property modulus K add up to 35.0 to 42.0pN or 39.0 to 41.6pN, or dielectric anisotropy be more than 11.0 or 11.0 to
15.0, above-mentioned elastic modelling quantity K add up to each dielectric anisotropy scope of 32.0 to 40.0pN or 33.5 to 38.5pN scope
It is interior to show higher elastic modelling quantity.
Thus, the liquid crystal display device comprising above-mentioned liquid-crystal composition be also able to maintain that although outside temperature changes
Uniform image quality, and also being capable of exhibit high brilliance under transverse electric field type of drive.
On the other hand, the liquid-crystal composition of said one embodiment can further include the chemical combination of following chemical formula 5
Thing：
In above-mentioned chemical formula 5, R4More than one-the CH included by the alkyl or abovementioned alkyl of carbon number 1 to 72-
The free radical replaced by-CH=CH-, ring A2 is cyclohexylidene or phenylene.
In the case where further using the compound of such chemical formula 5, the high resiliency mould of liquid-crystal composition can be made
Amount control becomes to be more prone to., can as the compound of above-mentioned chemical formula 5 from such high elastic modulus control aspect
Suitably to use R4- the CH included by the alkyl or abovementioned alkyl of carbon number 3 to 52- by-CH=CH- replace from
By the compound of base, more appropriately, R can be used4For-C3H7、-C5H11,-CH=CHCH3,-CH=CHCH2CHCH3Or-
CH2CH2CH=CHCH3Compound.
In addition, from the suitable and high elastic modelling quantity control aspect of liquid-crystal composition, the compound of chemical formula 5 is complete
1 to 10 weight % can be included in portion's liquid-crystal composition.
And then, the liquid-crystal composition of an embodiment requires physical property, such as anisotropy, rotation to further control it
Turn viscosity or clearing point etc., can further include selected from one or more of following chemical formula 6 to 10 compound：
In above-mentioned chemical formula 6 to 10, R5To R11It is each independently alkyl or the abovementioned alkyl institute of carbon number 1 to 7
Comprising 1 to 3 H be optionally substituted by halogen or more than one-CH2- quilt-C the ≡ in the way of oxygen atom is not directly connected C- ,-
CF2The free radical that O- ,-CH=CH- ,-O- ,-CO-O- ,-O-CO- or-O-CO-O- are replaced,
X1To X5It is each independently hydrogen or F, and X3And X4In one be F,
Y1For the alkyl or F of carbon number 1 to 7,
Y2And Y3It is each independently F ,-OCF3Or-CF3,
Ring B and ring C are each independently cyclohexylidene or phenylene,
Ring D and ring E are each independently cyclohexylidene, phenylene or fluorine phenylene,
(F) mean by fluorine to be replaced or unsubstituted.
In such other liquid-crystal compounds, above-mentioned chemical formula 8 can have the structure different from chemical formula 5.That is, change
The liquid-crystal compounds of formula 6 to 10 is different from the compound for the chemical formula 1 to 5 having been described above, and is to further control liquid
The various physical property of crystal composite and the composition put into, can have the chemical constitution different from above-mentioned chemical formula 1 to 5.
On the compound of such chemical formula 6 to 10, those skilled in the art can be according to the liquid crystal thing to be controlled
The species and degree of property are apparently selected and added, on the addition content range of these compounds, people in the art
Member can also suitably select addition in the range of the surplus except by the content of the compound of above-mentioned chemical formula 1 to 5.For example,
On the compound of such chemical formula 6 to 10,5 to 60 weights that those skilled in the art can be in whole liquid-crystal compositions
Measure suitably selection addition in the range of %.
For the requirement physical property of the liquid-crystal composition that more appropriately controls an embodiment, chemical formula can be suitably used
6 middle ring B and ring C are cyclohexylidene, R5For the alkyl of carbon number 2 to 5, R6- the CH included by abovementioned alkyl2- by-
The compound for the free radical that CH=CH- is replaced.
In addition, as the compound of chemical formula 7, in order to control the requirement physical property of liquid-crystal composition, can suitably use R7
For the alkyl of carbon number 2 to 6, X1、X2、X3And X5For hydrogen, X4For F, Y1For F compound, chemical formula 8 and 9 can suitably make
It is cyclohexylidene or phenylene with ring D, ring E is cyclohexylidene, phenylene or fluorine phenylene, R8And R9It is each independently carbon former
The alkyl of subnumber 2 to 6, Y2And Y3For F compound.
On the other hand, above-mentioned liquid-crystal composition can also be further comprising the present invention in addition to above-mentioned each liquid-crystal compounds
Usually used various additives in art.Specifically, above-mentioned liquid-crystal composition can further include antioxygen
Agent or UV stabilizer.In addition, as such UV stabilizer, Hals (Hindered amine light can be used
Stabilizer, hindered amine as light stabilizer) series.But the species of workable additive is without special in above-mentioned liquid-crystal composition
Limit, its species is obviously known to those skilled in the art, therefore omit the additional explanation to this.
The liquid-crystal composition of said one embodiment can have while positive dielectric anisotropy have it is high limpid
Point and elastic modelling quantity, may be used as liquid crystal display device (TFT LCD) liquid crystal composition.In addition, the liquid crystal of an embodiment
Composition can apply to the liquid crystal display device of vertical electric field pattern or horizontal electric field mode, can specifically be used in TN
(Twist nematic, twisted-nematic), STN (Super-twisted nematic, super twisted nematic), IPS (In-plane
Switc hing, plane conversion), FFS (Fringe field switching, fringe field switching), PLS (Pl ane line
Switching, upper thread conversion), AH-IPS (advanced high-performance IPS, advanced High Performance IP S), PSA
The liquid crystal display device of various patterns such as (Polymer sustained alignment, polymer-stabilized alignment).
On the other hand, according to another embodiment of invention, there is provided the dress of the liquid crystal display comprising above-mentioned liquid-crystal composition
Put.Above-mentioned liquid-crystal composition can be filled by known various methods in the technical field of the invention applied to liquid crystal display
Put.In addition, the liquid crystal display device of various patterns as described above can be made in above-mentioned liquid crystal display device.
Invention effect
The present invention can provide the liquid-crystal composition with high clearing point and elastic modelling quantity.Thus, comprising above-mentioned liquid crystal
The liquid crystal display device of composition uniform image quality that be also able to maintain that although outside temperature changes, and in transverse electric field
Also being capable of exhibit high brilliance under type of drive.
Embodiment
Hereinafter, in order to help to understand the present invention, preferred embodiment is disclosed.But following embodiments are intended merely to be more prone to
Understand the present invention and provide, present disclosure is not limited to this.In following embodiment and comparative example, liquid-crystal compounds
Mark as described in Table 2.
[table 2]
Embodiment and comparative example
According to the method recorded below, the physical property of the liquid-crystal composition manufactured in embodiment and comparative example have rated.As long as
It is not specifically stated, then does not add other additives in the liquid-crystal composition manufactured in embodiment and comparative example to determine liquid
The physical property of crystal composite.
(1) clearing point (Tni)
The liquid-crystal composition of clearing point to be determined is dripped with dropper on slide, then covered, manufacture is used
In the sample for determining clearing point.
Above-mentioned sample is added in the utensil with plum Teller-support benefit (METTLER TOLEDO) FP90 thermoregulators
Product, while being heated up with FP82HT thermal station (Hot stage) with 3 DEG C/min speed, while the change of observation sample.Record sample
Middle temperature when there is hole, by such operation repeatedly 3 times and export average value.And the value is defined as liquid-crystal composition
Clearing point.
(2) dielectric anisotropy (Δ ε)
On the dielectric anisotropy (Δ ε) of liquid-crystal composition, by the ε determined as follows | | and ε ⊥ substitute into formula 2 to calculate.
[formula 2]
Δ ε=ε | |-ε ⊥
1. permittivity ε | | measure：Have in the formation of 2 glass substrates on the face of ITO pattern, be coated with vertical-tropism agent
And form vertical alignment layer.Then, with interval (cell gap) of the vertical alignment layer toward each other, between 2 glass substrates for 4
μm mode, then coating sept (spacer) on any one substrate in 2 glass substrates glue 2 glass substrates
Knot.Then, the liquid-crystal composition as measure object is injected into the element, to be sealed with the bonding agent of ultraviolet curing.It
Afterwards, using the 4294A equipment manufactured by Agilent, the dielectric constant of element when determining 1kHz, 0.3V and 20 DEG C (ε | |).
2. permittivity ε ⊥ measure：Have in the formation of 2 glass substrates on the face of ITO pattern, Coating levels alignment agent
And form horizontal alignment film.Then, with interval (cell gap) of the horizontal alignment film toward each other, between 2 glass substrates for 4
μm mode, be coated with sept on any one substrate in 2 glass substrates, then make 2 glass substrates bondings.Then,
The liquid-crystal composition as measure object is injected into the element, to be sealed with the bonding agent of ultraviolet curing.Afterwards, using by
The 4294A equipment of Agilent manufacture, the dielectric constant (ε ⊥) of element when determining 1kHz, 0.3V and 20 DEG C.
(3) refractive anisotrop (Δ n)
Refractive anisotrop (Δ n), in 20 DEG C of light using 589nm wavelength, using by partially on liquid-crystal composition
Vibration plate is installed on the Abbe refractometer of eyepiece to be measured.The surface of headprism is rubbed in one directionAfterwards,
Liquid-crystal composition as measure object is added dropwise to headprism.Afterwards, determine polarization direction it is parallel with liquid crystal major axis when
Refractive index (n ⊥) when refractive index (n | |) and polarization direction are vertical with liquid crystal short-axis direction.Also, by above-mentioned refractive index value generation
Enter formula 1 and determine refractive anisotrop (Δ n).
[formula 1]
Δ n=n | |-n ⊥
(4) elastic modelling quantity (K11, K22, K33)
To after the liquid-crystal composition of 20 μm of horizontal test pieces injection embodiments and comparative example, while by voltage from 0V apply to
20V, while obtaining elastic modelling quantity by the change of electric capacity.Here, K11 refers to splay (splay) elastic modelling quantity, K22 refers to turn round
Bent (twist) elastic modelling quantity, K33 refers to bending (band) elastic modelling quantity, and K22 is so that (K11)/2 simplify and calculate.Temperature of the measurement
For 20 degree.
(5) rotary viscosity (γ)
Have in the formation of 2 glass substrates on the face of ITO pattern, Coating levels alignment agent and form horizontal alignment film.Connect
, in the way of being 20 μm by interval (cell gap) of the horizontal alignment film toward each other, between 2 glass substrates, in 2 glass
Sept is coated with any one substrate in substrate, then makes 2 glass substrate bondings.Then, liquid crystal is injected into the element
Composition, to be sealed with the bonding agent of ultraviolet curing.Afterwards, using the temperature controller for being mounted with to be manufactured by ESPEC companies
The equipment of model 6254 of the company of Japan of (model SU-241), transient current (transient current) is determined at 20 DEG C
Time to peak (peak time) and peak point current (peak current), so as to determine the rotary viscosity of the element.
According to the composition of Table 3 below to 5, the liquid-crystal composition of embodiment and comparative example has been manufactured.Also, according to above-mentioned side
Method, evaluates the physical property of each liquid-crystal composition and is together shown in table 3 to 5.
[table 3]
[table 4]
[table 5]
In above-mentioned table 2, the liquid-crystal composition that dielectric anisotropy is 4 to 6 is compared.Compared with comparative example 1 and 2, implement
The liquid-crystal composition of example can show high clearing point, while elastic modelling quantity increases by more than 15% and obtains the total of elastic modelling quantity
For more than 40 value.
In above-mentioned table 3, the liquid-crystal composition that dielectric anisotropy is 8 to 10 is compared.Confirm, with the phase of comparative example 3 and 4
Than the elastic modelling quantity of the liquid-crystal composition of embodiment increases to maximum 30%.
In above-mentioned table 4, the high dielectric anisotropy liquid crystal composition that dielectric anisotropy is more than 11 is compared.Confirm
Arrive, compared with comparative example 5 and 6, the elastic modelling quantity of the liquid-crystal composition of embodiment increases to maximum 20%.
Claims (12)
1. a kind of liquid-crystal composition comprising：
The weight of compound 3 to 55 % of chemical formula 1,
The weight of compound 2 to 45 % of chemical formula 2,
The weight of compound 3 to 35 % of chemical formula 3 and
The weight % of compound 1 to 30 of chemical formula 4,
And clearing point is more than 85 DEG C：
In the chemical formula 1 and 2, R1To R3The alkyl of carbon number 1 to 7 or the alkenyl of carbon number 2 to 7 are each independently,
Ring A1 is cyclohexylidene or phenylene.
2. liquid-crystal composition according to claim 1, wherein, dielectric anisotropy is 4.0 to 6.0, by 20 DEG C of measure
Splay elastic modelling quantity K11, the elastic modelling quantity K of total definition that distorts elastic modelling quantity K22 and modulus of elasticity in static bending K33 add up to
40.0 to 45.0pN, or
Dielectric anisotropy is 8.0 to 10.0, and the elastic modelling quantity K adds up to 35.0 to 42.0pN, or
Dielectric anisotropy is more than 11.0, and the elastic modelling quantity K adds up to 32.0 to 40.0pN.
3. liquid-crystal composition according to claim 1, wherein, in chemical formula 1, R1For the alkyl of carbon number 2 to 4.
4. liquid-crystal composition according to claim 1, wherein, in chemical formula 2, R2Alkyl for carbon number 3 to 5 or
The alkenyl of carbon number 2 to 5, R3For the alkyl of carbon number 1 to 3.
5. liquid-crystal composition according to claim 1 is comprising the compound of two or more chemical formula 2.
6. liquid-crystal composition according to claim 1, wherein, further include the compound of chemical formula 5：
In the chemical formula 5, R4More than one-the CH included by the alkyl or the alkyl of carbon number 1 to 72- by-
The free radical that CH=CH- is replaced, ring A2 is cyclohexylidene or phenylene.
7. liquid-crystal composition according to claim 6, wherein, in chemical formula 5, R4Alkyl for carbon number 3 to 5 or
- the CH that alkyl described in person is included2- the free radical replaced by-CH=CH-.
8. liquid-crystal composition according to claim 6 is comprising the compound of 1 to 10 weight % chemical formulas 5.
9. according to liquid-crystal composition according to any one of claims 1 to 6, wherein, further comprising selected from chemical formula 6 to 10
One or more of compound：
In the chemical formula 6 to 10, R5To R11The alkyl or the alkyl for being each independently carbon number 1 to 7 are included
1 to 3 H be optionally substituted by halogen or more than one-CH2- quilt-C the ≡ in the way of oxygen atom is not directly connected C- ,-CF2O-、-CH
The free radical that=CH- ,-O- ,-CO-O- ,-O-CO- or-O-CO-O- are replaced,
X1To X5It is each independently hydrogen or F, and X3And X4In one be F,
Y1For the alkyl or F of carbon number 1 to 7,
Y2And Y3It is each independently F ,-OCF3Or-CF3,
Ring B and ring C are each independently cyclohexylidene or phenylene,
Ring D and ring E are each independently cyclohexylidene, phenylene or fluorine phenylene,
(F) mean by fluorine to be replaced or unsubstituted,
Chemical formula 8 has the structure different from chemical formula 5.
10. liquid-crystal composition according to claim 9, wherein, in chemical formula 6, ring B and ring C are cyclohexylidene, R5For
The alkyl of carbon number 2 to 5, R6- the CH included by the alkyl2- the free radical replaced by-CH=CH-.
11. liquid-crystal composition according to claim 9, wherein, in chemical formula 7, R7For the alkyl of carbon number 2 to 6,
X1、X2、X3And X5For hydrogen, X4For F, Y1For F.
12. liquid-crystal composition according to claim 9, wherein, in chemical formula 8 and 9, ring D is cyclohexylidene or sub- benzene
Base, ring E is cyclohexylidene, phenylene or fluorine phenylene, R8And R9It is each independently the alkyl of carbon number 2 to 6, Y2And Y3
For F.
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| CN104673323A (en) * | 2015-02-04 | 2015-06-03 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition containing 2-methyl-3,4,5-trifluorophenyl liquid crystal compound and application thereof |
| CN104774623A (en) * | 2015-03-13 | 2015-07-15 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and applications thereof |
| CN104830349A (en) * | 2015-03-13 | 2015-08-12 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition containing 2-methyl-3,4,5-trifluorobenzene liquid crystal compound and application thereof |
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| CN104673323A (en) * | 2015-02-04 | 2015-06-03 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition containing 2-methyl-3,4,5-trifluorophenyl liquid crystal compound and application thereof |
| CN104774623A (en) * | 2015-03-13 | 2015-07-15 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition and applications thereof |
| CN104830349A (en) * | 2015-03-13 | 2015-08-12 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition containing 2-methyl-3,4,5-trifluorobenzene liquid crystal compound and application thereof |
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