The content of the invention
It is an object of the invention to provide a kind of liquid-crystal composition, its have little viscosity, fast response time, optical anisotropy it is big,
The characteristics such as dielectric anisotropy is big, good low temperature stability, the liquid-crystal composition can be applicable in liquid crystal cell, make the liquid crystal
Element have it is good display contrast, quick response and superior power saving performance.
The technical solution used in the present invention is:
A kind of liquid-crystal composition is provided, the liquid-crystal composition is included:
Account at least one formula I -1 of the 5-20% of the liquid-crystal composition gross weight and/or the compound of formula I -2
Account for the compound of at least one formula II of the 10-25% of the liquid-crystal composition gross weight
Account for the compound of at least one general formula III of the 5-20% of the liquid-crystal composition gross weight
Account for the compound of at least one general formulae IV of the 10-35% of the liquid-crystal composition gross weight
And
Account at least one compounds of formula V of the 30-70% of the liquid-crystal composition gross weight:
Wherein,
R1、R2、R3、R4And R5It is identical or different, independently of one another represent H, the alkyl that carbon number is 1 to 5 or
Alkoxyl, or the thiazolinyl that carbon number is 2 to 5;
R6And R7It is identical or different, alkyl or alkoxyl of the carbon number for 1-5, or carbon number are represented independently of one another
For the thiazolinyl of 2-5;
Represent It is wherein describedUpper one or
More H can be replaced by F;
It is identical or different, represent independently of one another
It is identical or different, represent independently of one another
X1Represent F ,-OCF3Or-OCF2- CF=CF2;
L1And L2It is identical or different, H or F is represented independently of one another;
M and p are identical or different, and 0,1 or 2 are represented independently of one another, wherein, when m is 2,Phase
It is same or different;When p is 2,It is identical or different;
N represents 0 or 1.
In some embodiments, R1、R2、R4And R5It is identical or different, independently of one another represent carbon number be 1 to
5 alkyl;
In some embodiments, R3Expression H or the alkyl that carbon number is 1 to 5;
In some embodiments, R6Expression carbon number is the thiazolinyl of alkyl or carbon number for 2-5 of 1-5;
In some embodimentsRepresentOr
In some embodiments,RepresentOr
In some embodiments,Represent
In some embodiments,RepresentOr
In some embodiments,Represent
In some embodiments, X1Represent F or-OCF3;
In some embodiments,It is identical or different, it is each independent
Ground is represented
In some embodiments, p represents 0 or 1.
In embodiments of the invention, the compound of the preferably formula I -1 and/or formula I -2 accounts for the liquid crystal combination
The 5-15% of thing gross weight;The compound of the formula II accounts for the 10-20% of the liquid-crystal composition gross weight;The formula
III compound accounts for the 5-12% of the liquid-crystal composition gross weight;It is total that the compound of the general formulae IV accounts for the liquid-crystal composition
The 10-30% of weight;And the compound of the formula V accounts for the 25-60% of the liquid-crystal composition gross weight.
In embodiments of the invention, preferably the compound of the formula I -1 selected from following compound group into group:
And
The compound of the formula I -2 selected from following compound group into group:
And
As particularly preferred scheme, the compound of the formula I -1 selected from following compound group into group:
And
As particularly preferred scheme, the compound of the formula I -2 selected from following compound group into group:
And
In embodiments of the invention, preferably the compound of the formula II selected from following compound group into group:
And
More preferably, the compound of the formula II -1 selected from following compound group into group:
And
More preferably, the compound of the formula II -2 selected from following compound group into group:
And
More preferably, the compound of the formula II -3 selected from following compound group into group:
And
More preferably, the compound of the formula II -4 selected from following compound group into group:
And
More preferably, the compound of the formula II -5 selected from following compound group into group:
And
More preferably, the compound of the formula II -6 selected from following compound group into group:
And
More preferably, the compound of the formula II -7 selected from following compound group into group:
And
More preferably, the compound of the formula II -8 selected from following compound group into group:
And
More preferably, the compound of the formula II -9 selected from following compound group into group:
And
More preferably, the compound of the formula II -10 selected from following compound group into group:
And
More preferably, the compound of the formula II -11 selected from following compound group into group:
And
More preferably, the compound of the formula II -12 selected from following compound group into group:
And
More preferably, the compound of the formula II -13 selected from following compound group into group:
And
As particularly preferred scheme, the compound of the formula II selected from following compound group into group:
And
In embodiments of the invention, preferably the compound of the general formula III selected from following compound group into group:
And
In embodiments of the invention, preferably the compound of the general formulae IV selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -1 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -2 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -3 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -4 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -5 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -6 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -7 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -8 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -9 selected from following compound group into group:
And
Preferably, the compound of the general formulae IV -10 selected from following compound group into group:
And
As particularly preferred scheme, the compound of the general formulae IV selected from following compound group into group:
And
In embodiments of the invention, preferably the compound of the formula V selected from following compound group into group:
And
Preferably, the compound of the formula V -1 selected from following compound group into group:
And
Preferably, the compound of the formula V -2 selected from following compound group into group:
And
Preferably, the compound of the formula V -3 selected from following compound group into group:
And
Preferably, the compound of the formula V -4 selected from following compound group into group:
And
Preferably, the compound of the formula V -5 selected from following compound group into group:
And
Preferably, the compound of the formula V -6 selected from following compound group into group:
And
Preferably, the compound of the formula V -7 selected from following compound group into group:
And
As particularly preferred scheme, the compound of the formula V selected from following compound group into group:
And
Used as particularly preferred scheme, it is total that the compound of the preferably formula I -1 and/or formula I -2 accounts for the liquid-crystal composition
The 7-12% of weight;The compound of the formula II accounts for the 10-18% of the liquid-crystal composition gross weight;The general formula III
Compound accounts for the 8-10% of the liquid-crystal composition gross weight;The compound of the general formulae IV accounts for the liquid-crystal composition gross weight
10-30%;And the compound of the formula V accounts for the 30-60% of the liquid-crystal composition gross weight.
The present invention also provides a kind of liquid crystal display device, and the liquid crystal display device includes liquid crystal combination provided by the present invention
Thing.
The present invention adopts above-mentioned technical proposal, and compared to the prior art acquired technological progress has:
Liquid-crystal composition provided by the present invention has wider nematic temperature range, higher optical anisotropy, higher
The characteristic such as dielectric anisotropy, higher clearing point, low viscosity and low temperature storage stability height, it is adaptable to liquid crystal display
In device, make the liquid crystal display device have preferably display contrast, quick response and superior power saving performance, can
Used in low temperature environment.
In the present invention if no special instructions, described ratio is weight ratio, and all temperature are degree celsius temperature, described
Response time data test select box thickness be 7 μm.
Specific embodiment
The present invention is illustrated below with reference to specific embodiment.It should be noted that the following examples are showing for the present invention
Example, only for illustrating the present invention, and is not limited to the present invention.In the case of without departing from present subject matter or scope, can
Carry out other combinations and the various improvement in present inventive concept.
For ease of expression, in following embodiment, the code listed by the unit structure table 1 of liquid-crystal composition is represented:
The unit structure code of the liquid-crystal compounds of table 1
By taking the compound of following structural formula as an example:
Structural formula code as listed by with table 2 is represented, then can be expressed as:NCPUF, the n in code represents left end alkyl
C atomicities, such as n are " 3 ", that is, represent that the alkyl is-C3H7;C in code represents cyclohexyl.
In following examples test event to write a Chinese character in simplified form code name as follows:
Cp(℃):Clearing point (nematic-isotropic phase transition temperature)
Δn:Optical anisotropy (589nm, 25 DEG C)
Δε:Dielectric anisotropy (1KHz, 25 DEG C)
V10:Threshold voltage (character voltage in 10% relative contrast, normal white mode)
η:Kinematic viscosity (mm2·s-1, 25 DEG C, unless otherwise stated)
t-30℃:The low-temperature storage time (at -30 DEG C)
VHR (initial):Voltage retention (%)
VHR(UV,20min):Voltage retention (%) after UV light irradiations 20min
VHR (high temperature):High temperature keeps the voltage retention (%) after 1h at 150 DEG C
ρ:Resistivity (Ω cm, 25 ± 2 DEG C)
Wherein, refractive anisotrop using abbe's refractometer under sodium lamp (589nm) light source, 25 DEG C of tests obtain;
Measurement box is TN90 types, and box is thick 7 μm.
Δ ε=ε ‖-ε ⊥, wherein, ε ‖ are the dielectric constant parallel to molecular axis, and ε ⊥ are the dielectric constant perpendicular to molecular axis,
Test condition:25 DEG C, 1KHz, testing cassete be TN90 types, box is thick 7 μm.
VHR (initial) is obtained using TOY06254 type liquid crystal evaluation of physical property system testings;Test temperature is 60 DEG C, is surveyed
Examination voltage is 5V, and test frequency is 6Hz.
VHR (UV) is obtained using TOY06254 type liquid crystal evaluation of physical property system testings;The use of wavelength is 365nm, energy
Measure as 6000mJ/cm2Light irradiation liquid crystal 20min after test, 60 DEG C of test temperature, test voltage is 5V, test frequency
For 6Hz.
VHR (high temperature) is obtained using TOY06254 type liquid crystal evaluation of physical property system testings;Liquid crystal high temperature dwell at 150 DEG C
Hold and tested after 1h, 60 DEG C of test temperature, test voltage is 5V, and test frequency is 6Hz.
Resistivity applies the DC voltage of 10V by injecting 1.0mL liquid crystal in fluid cartridge, determines 10 after applied voltage
The DC current of the box after second is calculating.
Electricalresistivityρ is calculated by following formula:
(resistivity)={ (voltage) × (box capacity) }/{ (gravity flow electric current) × (permittivity of vacuum) }.
The each composition for being adopted below in an example, can be synthesized by known method, or by business
Approach is obtained.These synthetic technologys are conventional, and resulting each liquid-crystal compounds Jing tests meet electrical type compound standard.
The proportioning of each liquid-crystal composition specified according to following examples, prepares liquid-crystal composition.The system of the liquid-crystal composition
Standby carried out according to the conventional method of this area, such as takes the ratio mixing according to the rules of heating, ultrasonic wave, the mode that suspends
It is obtained.
Reference examples 1
The liquid-crystal composition of reference examples 1 is configured to by each compound and percetage by weight listed in table 2, it is filled in liquid crystal
Performance test is carried out between display two substrates, test data is as shown in the table:
The liquid crystal combination composition formula of table 2 and its test performance
Reference examples 2
The liquid-crystal composition of reference examples 2 is configured to by each compound and percetage by weight listed in table 3, it is filled in liquid crystal
Performance test is carried out between display two substrates, test data is as shown in the table:
The liquid crystal combination composition formula of table 3 and its test performance