TW201022412A - Liquid crystal composition - Google Patents

Abstract

The present invention provides a liquid crystal composition. The liquid crystal composition includes 10 to 25 percent by weight of compound (A), 5 to 55 percent by weight of compound (B) and 35 to 80 percent by weight of compound (C). The structural formulas and the definition of each substituted group of the compounds (A), (B) and (C) are defined in the specification and claims. The liquid crystal composition of the present invention driven by voltages has fast response time, higher value of Delta n and better low temperature stability and is suitable for manufacturing large-size liquid crystal displays.

Description

201022412 * VI. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal composition, and more particularly to a liquid crystal composition suitable for producing a large-sized liquid crystal display. [Prior Art] Since liquid crystal displays have the advantages of thinness, light weight, low power consumption, no light pollution, and compatibility with semiconductor process technology, liquid crystal displays have been widely used in various products. For example, communication fields (such as mobile phones, wireless phones, fax machines), measurement fields (such as industrial instruments, machines), home life areas (such as audio and video appliances, video games), information fields (such as monitors, portable) computer). In addition, with the continuous development of various new products, the size of liquid crystal displays has also grown from about 2 inches to more than 42 inches. Currently, commercial products are also the most eye-catching and demanding of LCD TVs. Although liquid crystal displays have many advantages, there are still many improvements in large-size liquid crystal displays, such as contrast, response time, low-temperature stability, etc., because liquid crystal displays use electric field effect to cause liquid crystal molecules to be aligned. The state changes, and the polarization state and direction of the light change, and the contrast between the light and the dark is obtained, so that a long response time is required, and this problem has become an object of great improvement in the industry. In addition, in view of the wide application of liquid crystal displays on the market today, and to further improve various disadvantages of commercially available liquid crystal displays, and to meet the needs of future applications, the liquid crystal composition in liquid crystal displays should be specifically improved. ADEKA (ADEKA CORPORATION) has a series of patents, such as WO 2004/058676 (US corresponds to us 3 201022412 7,001,647) 'WO 2006/061966, WO 2006/132015, JP 2005-15775, JP 2007- 277127 and WO 2007/063681, etc. In these patents, most of them are liquid crystal compositions mainly composed of perfluoroallyloxy compounds requested by WO 2004/058676. Taking WO 2006/061966 as an example, the liquid crystal composition of the present invention contains 15 wt% or more of a compound having a terminal structure represented by the following formula:

F In the above formula, Q represents a saturated or unsaturated alkyl group which is optionally substituted by a _ atom and has a carbon number of from 1 to 8. In this patent, although some combinations of liquid crystal compositions have been disclosed, with the continuous introduction of various new products, especially the development of large-size LCD TVs, the design of the original liquid crystal composition has been insufficient. In view of the bottleneck faced by large-sized liquid crystal displays currently on the market, the biggest problem is the response speed. If the response speed is not fast enough, the image tailing is likely to occur when the action screen is displayed. To solve this problem, you can proceed in two directions: (1) reduce the thickness of the liquid crystal cell [ie, cell thickness (generally indicated by "d")], because the response time of the liquid crystal display and the thickness of the liquid crystal display device are d. The square is inversely proportional. However, according to the formula: Anxd = constant, the smaller the d is, the larger the refractive index anisotropy (An) is needed; (2) the lower the viscosity of the liquid crystal. According to the existing large-size liquid crystal display, the current industry hopes that the response time can be shortened to less than 5.5 msec, and An expectation can be increased to more than 0.11. As far as the test results of the embodiment of 201022412 WO 2006/061966 are concerned, An is at most only 0.1019 ′, which is still a gap compared to the Δι1 value required for the current large-size liquid crystal display. In addition, the response time was not tested in this patent and no improvement was proposed. To solve the above problems, for example, a liquid crystal composition having a higher Δη (> 〇 11), a faster response time (< 5.5 msec), and a preferred low temperature stability (<_2〇.〇) should be developed. The invention can effectively solve the bottleneck faced by the existing large-sized liquid crystal display. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a response time that can be shortened while driving at a voltage, and at the same time having a higher Δη and better low-temperature stability. The liquid crystal composition of the present invention comprises 10 to 25 wt% of the compound (A) represented by the following formula (Α), 5 to 55 wt% of the compound (B) represented by the following formula (B), and 35~80 wt% of the compound (c) shown by the following formula (c) · X1 R1^G1-Z1^G2~Z2--^^_-y1 (A) . X2 R2-(g3-Z3^-G4 —24—〇-cf2—CF=CF2 (B) R3-(G5_Z5j^G6)_z6 —G7—Y2 (C) ^ , where G, G, G, G4, G5, and G6 represent 14 phenyl groups, respectively. 14. a cyclohexylene group, a 2,6-anthranyl group or a 6 6 decahydronaphthyl group, one of the 14 phenyl groups being selectively substituted by -N= or the M phenyl group being partially or completely qi Atomic 5 201022412 is optionally taken from a halogen atom or a cyano group Alternatively, the -CH2- of the 1,4-cyclohexylene group is optionally substituted by -Ο- or -S- or a part or all of the hydrogen atoms of the 1,4-cyclohexylene group are derived from a dentate atom or a cyano group. Substituted; G7 represents 1,4-phenylene, 3-fluoro-1,4-phenylene, 5-fluoro-indole-phenyl, 3,5-difluoro-1,4-phenylene, 1,4-cyclohexylene, 2,6-anthranyl or 2,6-decachlorocain; ζ1, Ζ2, Ζ3, Ζ5 and Ζ6 represent a single bond, -COO-, -OCO-, -CH2CH2- , -CH=CH-, -(CH2)4-, -CH20-, -OCH2-, -(CH2)3〇-, -0(CH2)3-, -CH=CHCH20-, 0-och2ch=ch- , -oc-, -cf2o- or -0CF2-; z4 represents a single bond or an alkylene group, and some or all of the hydrogen atoms of the alkylene group are substituted by a halogen atom or a cyano group; R, R and R3 represent R or a ruler, the ruler represents an alkyl group, the alkyl group optionally having an unsaturated bond, the -CH2- moiety being substituted by a 〇_, -c〇一 or _c〇〇_, or a part or all of hydrogen The atom is replaced by a dentate atom or a cyano group;

X, x and Y1 respectively represent hydrogen, fluorine, trifluoromethyl, trifluoromethyl, -OChH or -OCFH2, provided that when χ1 and X2 are simultaneously hydrogen, Υ1 may not be hydrogen, fluorine or -〇CFH2; Y2 represents fluorine, gas, -OCFH2, a linear or branched alkyl group having a carbon number range, an alkoxy group, or a dilute group having a carbon number ranging from 2 to 7, provided that G7 is 3_fluoro- Μ·benzene At the base time, Υ2* can be fluorine, gas or -0CFH2 and a, c and d are respectively 〇, i or 2 and c+d> 〇, 1) is 1 6 201022412 is 2, each G1 and Z1 are The same or different, and when b is 2 or 3, each of G3 and Z3 is the same or different, and when c is 2, each of G5 and Z5 is the same or different. In order to provide a liquid crystal composition with high An, fast response time, and better low temperature stability, the liquid crystal composition of the present invention attempts to use the compound (A), the compound (B) and the compound for the needs of the existing large liquid crystal display. (C) is combined, and depending on the characteristics of each compound, if the compound (A) has a group having two or more fluorine atoms, the polarity is large to exhibit a higher φ Α ε and a high impedance, the compound ( B) has a low rotational viscosity, a high Α ε, a high Tni characteristic, a high impedance and excellent low temperature stability due to a special perfluoroallyloxy group, and the compound (C) has a low polarity and a low rotational viscosity and The characteristics of the high Tni are further adjusted by appropriately adjusting the content ratio of the above three compounds... The content of the compound (A) is 10 to 25 wt%, the content of the compound (B) is 5 to 55 wt%, and the compound (C) The content of the liquid crystal composition of the present invention is preferably low temperature stability, high An, short response time and other properties [such as clarification point temperature (Tni), dielectric anisotropy) Sex (dielectric an Isotropy, Δε), threshold voltage (Vth) and rotational viscosity (τ 1) meet the industry's desired advantages. The liquid crystal composition of the present invention is suitable for use in the production of large liquid crystal displays. [Embodiment] In the liquid crystal composition of the present invention, when the content of the compound (A) is more than 25 wt%, the cryopreservation temperature will become high. When the compound (B) is not added, the response time of the liquid crystal composition may be lengthened or the storage temperature of the low temperature may be high; when the content of the compound (B) is higher than 55 wt%, the liquid crystal group 201022412 may be formed. The response time is lengthened. When the content of the compound (C) is less than 35 wt%, the response time of the liquid crystal composition may be lengthened; when the content of the compound (C) is more than 80 wt%, the cryopreservation temperature of the liquid crystal composition may be changed. high. Preferably, the liquid crystal composition contains 1 to 25 wt% of the compound (A), 5 to 45 wt% of the compound (B), and 45 to 80 wt% of the compound (C). Preferably, G1 and G2 in the formula (A) represent 1,4-phenylene, 3-fluoro-1,4-phenylene, 5-fluoro-1,4-phenylene, and 3, respectively. , 5-difluoro-1,4-phenylene or 1,4-cyclohexylene. More preferably, X1 and X2 in the formula (A) represent hydrogen or fluorine, respectively, and Y1 represents fluorine, trifluoromethyl or trifluoromethoxy, respectively, and the condition is that when X1 and X2 are hydrogen, γ1 It is a trifluoromethyl group or a trifluoromethoxy group. More preferably, the compound (Α) represented by the formula (Α) is selected from

201022412 -OCFc,

9 201022412

F

F F

F or one of these combinations. Still more preferably, R1 represents R or RO, and R is selected from a linear or branched alkyl group having a carbon number ranging from 1 to 7, or a straight bond having a carbon number ranging from 2 to 7 A chain or branched alkyl group. Still more preferably, the compound (A) is selected from

F

F

(hereinafter referred to as "CCP-VFF ί"

CF,

C2R5~^y^y^y~cF2

(hereinafter referred to as "CCP-2TF") (hereinafter referred to as "CCP-3TF") (hereinafter referred to as "CCP-4TF"), (hereinafter referred to as "CCP-5TF"), (hereinafter referred to as "CPP-2TF") "), (hereinafter referred to as "CPP-3TF"), (hereinafter referred to as "CPP-4TF") 10 201022412 C<H 5nll

OCFa

F

(hereinafter referred to as "CPP-5TF") (hereinafter referred to as "CPP-20TF" F (hereinafter referred to as "CCP-2FFF")

F

F

C^H 5nll

F (hereinafter referred to as "CCP-5FFF")

F

F

F

F (hereinafter referred to as "CPP-4FFF") 11 201022412

F

F F (hereinafter referred to as "CPP-5FFF")

F

F F (hereinafter referred to as "PP(3F)P-3FF")_ c3h7

F F

❿ 3FFF") or a combination of these. In one embodiment of the present invention, the compound (A) is selected from the group consisting of CCP-VFF, CCP-2TF, CCP-3TF, CPP-3TF, CPP-5TF, CPP-20TF, CCP-3FFF, CCP-4FFF. , CPP-3FFF, CPP-5FFF, CPP-2FF, PP-3FF, PP(3F)P-3FF, PP(3F)P-3FFF or a combination of these. Preferably, G3 and G4 in the formula (B) represent 1,4-phenylene, 3-fluoro-1,4-phenylene, 5-fluoro-1,4-phenylene, and 3, respectively. 5-Difluoro-1,4-phenylene or 1,4-cyclohexylene. More preferably, Z4 in the formula (B) represents a single bond. Still more preferably, the compound (B) is selected from the group consisting of 12 201022412 - 〇 - cf2 - cf = cf2 - ο - cf2 - cf = cf2

F

F 13 201022412

R2

R2- 〇—cf2—cf=cf2 14 201022412

The compound (B) is selected from

R2 represents R or RO, and R is selected from a linear or branched Hyun group having a carbon number ranging from 1 to 7, or a direct bond or a branch having an unsaturated bond and having a carbon number ranging from 2 to 7. Burning base. Still more preferably, the compound (B) is selected from the group consisting of 15 201022412

F

F

(hereinafter referred to as "B- ©

F

") or a combination of these. In one embodiment of the invention, the compound 3F 'B-CP-3, B-CP-4 or a combination thereof. Preferably, G5, G6 and G7 in the formula (C) respectively represent M_phenylene, 3H,4_extension, 5-oxo-1,4-phenylene, 3,5-difluoro -l, 4-phenylene or 1,4-cyclohexyl. More preferably, the compound (c) is selected from the group consisting of -

16 201022412

F

Γ2 or a combination of these. More

17 201022412

Y2 or a combination of these. More preferably, the formula (γ2 represents a straight or branched burnt group having a fluorine or a carbon number ranging from 1 to 7 and R represents a ruler and the ruler is selected from a direct bond or a branch having a carbon number ranging from 1 to 7. a calcining group or a calcining group having an unsaturated bond and having a carbon number in the range of 2 to 7 or more preferably. The compound (C) is selected from

Shortly referred to as "CC-V3"), Lu is abbreviated as "CC-V4"), abbreviated as "CC-V5", hereinafter referred to as "CPP-2F", hereinafter referred to as "CPP-3F"), η (hereinafter referred to as "pp(3F)P-23") ❹ C5H11 (hereinafter referred to as "pp(3F)P-25)

18 201022412 The compound (C) is selected from the group consisting of CC-V3, CPP-2F, CPP-3F, PP(3F)P-23, PP(3F)P-25, PP(3F)P-35, CCP-V1. , CCP-31 or a combination of these. The liquid crystal composition of the present invention is obtained by directly mixing the above respective compounds. The liquid crystal composition of the present invention has a response time of 5.5 msec or less at a driving voltage of a general large-sized liquid crystal display. Meanwhile, the liquid crystal composition of the present invention has a Tni temperature higher than 73 ° C, as low as -20 ° C, a temperature preservation temperature, a Δη of 0.11 or more (at a wavelength of 589 nm), and a 3.4 or more (up to 5.7). The dielectric anisotropy Α ε. The invention is further illustrated by the following examples, which are to be construed as illustrative and not restrictive. <Examples> [Combination method of liquid crystal compositions of Examples 1 to 11 and Comparative Examples 1 to 7] Compounds (A) of each of the following Examples and Comparative Examples were respectively subjected to the following Tables 1 to 3, respectively. , (Β) and (C) and the components contained in each component and the content of each compound (wt%) are mixed to obtain a liquid crystal composition (the following content is the total weight of the liquid crystal composition produced) Calculated for 100 wt%). 19 β·9), εέε) <Η (s<N)HI£-ddu p9)ddu£du (0_9)! MK-dGK)ddl(e.aiux-ddu (οοο)ίϋκ-<Μυ sc-dloz-ddu (ocn)£ls,ddu p9)H£Kd(iK)dd (0-9)£tiK-ddu ( 0_/.)_2sdd (0.8)ddde-ddu (os)£MK-duu: (0_/. )ίΜΚα,(Ηε)ίΗ (o.£)dl£-duu (od-dd (sd£(de)dd (0-b) dd£K-ddu (0·ε)£1Ιε 丨duuo.QddA-duy (os)diK-da( od£(de)dd (osdiHrn-ddu ps)£LK-dd_ s_s)d£ iK-d(£K)dd (osddds-ddu (*<«) #φ^ _<«>Li 1.Τ-I inch 0. inch inch 〇·inch ε

0·inch I 0·卜 0.9 QL· 0·!> Γ inch inch (Γ6ι); κώυ_Μ (o.sdd inch-duu-ffl(OOl)dd<rl,duu-m p9)idu-a (5<Ν )ιΛ6υ (OOl^z-diHc-dd o.ss-d(de)dd s-OaeA-uu s'.EiK-du-a p inch I): LK, duu丨ffl (OOI)&rn-ddu_ « »n-6e (smA-duu ©•sg-dGK)*!. (0·inch)s(s-dcfK)ddl (0Όι)ε2(Ηε1 (ΟΌίΝ)εΛ-υυ

0.8 inch (osle-dul-M(0.9)£Ιε-<ίυ-« s.9)dd inch-duu-a (oooMTK-duu-a (oookiK-ddu-M (0s>n£:-dGK) Dd (oss(sd(iK)dd (0oo)sd(iK)dd (ο(Νε)εΛ-υυ (0. ε-duu-CQ o6Hd£-ddu-ffl (ocsitK-ddu-a ssdde-ddu- a (06&εέυώ pz-MSK-ddu-a ou (0. inch ke-ddu ©.sdts-ddu (osdloe-dGKftrd s'idsz-dGIedd pll) £zd(tK)dd (001 inch) εΛ-υυ

o.cnL s-dΙε-duu (0·inch)d2du ssdsdu Ps)s2(de)dd (o.s)sz-d(£K)dd (>o_ u)£z-d(d£)dd (sCNscnA—uu

Ir>.lL (o(N)lA-duu osdiK-ddu os)d2du(os)s£GK)dd qs)s<N,d(dcn)dd io-II)s-dGK)dd (Ο.ΕεΛ -υυ

Q-ZL qs)d2du (o.siK-ddu o.s)s2GK)dd: ps)s<N-d(de)ddl ο·ΖΙ)£2{Ηε)αΗαΗ (0.6ε)εΛόυ

Q-LL

(o(N)lA-duu (0_s)d2du (ovo)iK-ddu (0.s)s2(iK)dd (oss(s-dGK)dd (0<NI)etN-d(iK)dd S' .ISSA-UU 4»1>Jie (*♦) 哒鹿荽φ=^ (*咖) u)l 荽201022412 Table 2

Example 9 Example 10 Example 11 Comparative Example 1 Comparative Example 2 Total inclusion table 11.0 11.0 15.0 25.0 36.0 Compound composition (content) CPP-3FFF (6.0) CPP-3FFF (6.0) CPP-2FF (4.0) CCP-3FFF (5.0) PP-3FF(5.0) PP(3F)P-3FF(5.0) PP(3F)P-3FF(5〇) PP(3F)-3FF(4.0) CCP-4FFF(5.0) CPP-3FFF( 10.0) CCP-2FFF(6.0) PP-3FF(7.0) PP(3F)P-3FFF(5.0) (A) CCP-4TF(10.0) CCP-3FFF(10.0) PP(3F)P-3FFF(5.0) Total content 44.0 51.0 25.0 0 0 Compound (B) B-CPP-3FF (6.0) B-CPP-3FF (6.0) B-CPP-3FF (10.0) Compound B-CCP-3FF (8.0) B-CCP-3FF ( 8.0) B-CCP-3FF (10.0) B-CCP-4FF (8.0) B-CCP-4FF (8.0) B-CP-3F (5.0) Composition B-CP-3F (15.0) B-CP-3F ( 15.0) (Content) B-CP-3(7.0) B-CP-3(7.0) B-CP-4(7.0) ▲Content 45.0 38.0 60.0 75.0 64.0 CC-V3(20.0) CC-V3(13.0) CC- V3(35.0) CC-V3(30.0) CC-V3(35.0) Compound (C) PP(3F)P-23(12.0) PP(3F)P-23(12.0) PP(3F)P-23(12.0) CP-5F (5.0) PP(3F)P-23(8.0) Compound PP(3F)P-25(5.0) PP(3F)P-25(5.0) PP(3F)P-25(5.0) PP(3F ) P-23(10.0) PP(3F)P-25(4.0) PP(3F)P-35(5.0) PP(3F)P-35(5. 0) PP(3F)P-35(5.0) PP(3F)P-25(5.0) PP(3F)P-35(4.0) Composition CCP-V1(3.0) CCP-V1(3.0) CCP-31(3_0 PP(3F)P-35(5.0) CCP-V1(5.0) (Content) CCP-V1(5.0) CPP-32(3.0) CPP-3F(5.0) PP(3F)P-4F(10.0) CCP- 31(5.0) 21 201022412 Table 3 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Compound (Α) Total content 9.0 29.4 17.0 29.0 9.0 Compound composition (including *) PP-3FF (4.0) PP-3FF ( 2.0) PP-3FF(11.0) PP(3F)P-3FF(7.0) PP-3FF(9.0) CPP-2FF(6.9) CPP-5FF(6.0) CPP-5FF(10.0) CPP-3FF(13.0) CCGP- 3FF(10.0) PP(3F)P-3FF(7.5) CPP-2TF(2.0) Total content 52.0 10.9 57.0 37.0 57.0 B-CPP-3FF(15.0) B-CPP-3FF(10.9) B-CPP-3FF( 15.0) B-CPP-3FF (15.0) B-CPP-3FF (15.0) Compound B-CCP-3FF (15.0) B-CCP-3FF (15.0) B-CCP-3FF (10.0) B-CCP-3FF ( 15.0) Composition B-CCP-4FF(10.0) B-CCP-4FF(15.0) B-CP-3(6.0) B-CCP-4FF(15.0) (Β) (Content) B-CP-3(6.0) B-CP-3 (6.0) B-CP-4 (6.0) B-CP-3 (6.0) B-CP-4 (6.0) B-CP-4 (6.0) B-CP-4 (6.0) Total content 39.0 59.7 26.0 34.0 34.0 Compound (C) CC-V3 (12.0) CC-V3 (31.0) CC-V 3(5.0) CC-V3(34.0) CC-V3(9.0) Compound composition (content) CPP-3C1 (6.0) PP-3C1 (7.8) PP(3F)P-23(8,0) PP-3F(4.0 CCP-V1(5.0) PP(3F)P-25(6.3) PP(3F)P-25(5.0) PP(3F)P-23(7.0) PP(3F)P-23(6.0) CPP-2F (6.0) PP(3F)P-35(5.0) PP(3F)P-25(5.0) PP(3F)P-25(5.0) CPP-3F (6.3) CCP-V1(3.0) PP(3F)P -35 (5.0) PP (3F) P-35 (5.0) CPP-32 (2.3) CCP-V1 (4.0) [Test] The liquid crystal compositions of Examples 1 to 11 and Comparative Examples 1 to 7 were respectively subjected to the following test methods. The results of the tests are shown in Table 4 below: (1) Clarification point (Tni, °c): indicates the temperature value from the liquid crystal phase to the liquid state, and is observed under a microscope using a heater. The clarification point temperature is generally expected to be above 70 °C. (2) Refraction anisotropy (Δη): The test was carried out at an amplitude of 589.3 nm using an Abbe curve. The Δη range is preferably greater than 0.11 in view of the demand for a large-sized liquid crystal display. (3) Dielectric anisotropy (Δε): the difference between the average dielectric constant measured parallel to the long axis of the molecule and the average dielectric constant measured perpendicular to the long axis of the molecule. That is, the liquid crystal composition is injected into a test cell of a parallel alignment 22 201022412 (homogenous alignment) and a test box of a homeotropic alignment, and the LCD capacity tester (manufactured by AMT, Japan, model LT) -938) Measured at 25 °C. According to the demand of large-size liquid crystal displays, the range of Α ε is preferably 3.0 to 7.0. (4) Threshold voltage (Vth, abbreviated as V): The liquid crystal compositions of Examples 1 to 11 and Comparative Examples 1 to 7 were respectively injected into a cell having a cell thickness of 4 μm, using photoelectric The measurement system (manufactured by AUTRONIC, DE., model DMS-501) was applied with a voltage of 5 V and 64 Hz to obtain a graph of transmittance versus voltage. The Vth is calculated by the computer. The Vth range currently used in the industry is approximately 1.8-2.5V. (5) Response time (abbreviated as RT, unit is msec): The liquid crystal compositions of Examples 1 to 11 and Comparative Examples 1 to 7 were respectively injected into a box of 4 μπι thick, using an electro-optical measurement system (by AUTONICI, Germany) Manufactured, model DMS-501), applying 6V, 64Hz voltage, calculated by computer® to get RT. At 6V, the response time range is usually expected to be 5.5 msec or less. (6) Liquid crystal phase cryopreservation temperature. Take 1~2g of liquid crystal composition into 7ml transparent glass bottle and place it in the freezer at 0~-40°C for 240 hr. The liquid crystal compound does not crystallize and has flow. The lowest temperature of sex. (7) Rotational viscosity (γΐ, mPa's): The liquid crystal composition is injected into a 180 degree anti-alignment test cell, and can be manufactured by γΙ/Κ measuring instrument (Taicol, USA 23 201022412, model LC property station) Test at a test temperature of 25 ° C). Table 4 No. Compound composition Tni Δη Δε vth RT (msec) Cryopreservation temperature (°C) γΐ (mPa-s) Example 1 Αΐ6.〇, Βγ.〇9 C77.O 73 0.1251 3.459 2.518 4.9 -20 66.69 Example 2 Α21.0» Β7.0, C72.O 74.2 0.1268 3.961 2.305 5.1 -20 51.21 Example 3 Α20.5, Be.o, C73.5 73.5 0.1261 3.831 2.428 4.6 -20 51.32 Example 4 ^20.0» B7. 0, C73.0 78.8 0.1248 4.307 2.412 4.9 -20 52.83 Example 5 A15.0, B14.0, C71.0 80.5 0.1244 4.184 2.584 4.6 -20 49.99 Example 6 A18.0, B34.0, G48.0 74.6 0.1126 5.112 1.959 5.4 -20 55.53 Example 7 A16.5, B44.0. C39.5 74 0.1228 5.002 1.932 4.6 -20 65.45 Example 8 A14.5, B41.I, C44.5 76.7 0.1301 5.701 2.171 4.8 -30 70.59 Example 9 An.o, B44.0> C45.0 75.9 0.124 4.72 2.151 5.2 -20 69.97 Example 10 An.o, B51.0, C38.0 73 0.1261 5.009 2.11 5.2 -20 67.76 Example 11 A15. O, β25.0, C6〇.〇72 0.1202 3.573 2.286 4.9 -20 54.52 Comparative Example 1 A25.〇s C75.O 87.6 0.1185 3.836 2.501 6 -10 73.75 Comparative Example 2 A36.O, C64.〇73.4 0.1002 4.65 1.939 6 -20 60.00 ratio Comparative Example 3 A9.O, B52.0, C39.〇72 0.1211 5.257 1.932 6.6 -20 72.83 Comparative Example 4 A29.4, B10.9, C59.7 73.5 0.1270 5.01 2.009 5.5 10 56.19 Comparative Example 5 A17.O, B57.0, C26.O 83.4 0.1295 6.10 2.073 6.4 -10 113.28 Comparative Example 6 A29.〇9 B37.0, C34.0 71.8 0.0932 5.25 1.812 8.8 0 59.22 Example 7 A9.0, B57.0, C34 .0 76.1 0.1211 5.64 1.919 6.6 -10 86.41 201022412 [Results] From the results of Table 4, the liquid crystal compositions of Examples 1 to 11 have an Δη of 0.1126-0.1301, a response time of 4.6-5.4 msec, and -20°0. -30° (: liquid crystal phase cryopreservation temperature and rotational viscosity of 49.99~70.59 mPa.s, fully meet the needs of the industry, especially suitable for making large LCD monitors. In contrast, in Comparative Examples 1 to 7, the response time is greater than 5.5 msec and some of the comparative examples have a cryopreservation temperature higher than -20 ° C, Δη < 0.11 or a rotational viscosity greater than 80 mPa.s, which does not meet the current industry. demand. For example, when comparing Comparative Example 1 with Example 4, it can be found that the ratio of the response time and the cryopreservation temperature cannot be achieved in the industry because the compound (B) is not added in Comparative Example 1, and it is proved that the compound (A) and the compound are appropriately formulated. The combination of (B) and compound (C) is indeed in line with the needs of the industry. From the results of Comparative Examples 3 to 7, when the contents of the compounds (A), (B) and (C) were not controlled at 10 to 25 wt%, 5 to 55 wt% and 35 to 80 wt%, respectively. Δ η, response time, cryopreservation temperature and rotational viscosity may not be able to meet the needs of the industry at the same time. In the case of Comparative Example 3, the compound (Α) content is 9 wt%, and the final response time is 6.6. Demand; Comparative Example 4, because the content of the compound (A) exceeded 25 wt%, the response time was 5.5 msec and the cryopreservation temperature was raised to 10 ° C; Comparative Example 5 because the content of the compound (B) exceeded 55 wt% and The content of the compound (C) was less than 35 wt%, and the response time and the cryopreservation temperature were not satisfactory. This proves that in addition to the combination of compounds (A), (B) and (C) 25 201022412, it is necessary to properly mix the content of each compound to meet the current liquid crystal composition for making large liquid crystal displays. The nature of the demand. In summary, the liquid crystal composition of the present invention comprises 10 to 25 wt% of the compound (A), 5 to 55 wt% of the compound (B), and 35 to 80 wt% of the compound (C), by combining the three compounds. At the same time, the content range is adjusted so that the obtained liquid crystal composition has a response time of Δη (up to 0.1301) of more than 0.11, less than 5.5 msec (up to 4.6 msec), and a response time of less than -20 ° C (low to reach -30 ° C) cryopreservation temperature. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change of the patent application scope and the description of the invention is Modifications are still within the scope of the invention. [Simple description of the diagram] None [Key component symbol description] None 26

Claims (1)

201022412 VII. Patent application scope: 1. A liquid crystal composition comprising: 10 to 25 wt% of a compound represented by the following formula (A): 5 to 55 wt% of a compound represented by the following formula (B) (B) and 35-80 wt% of the compound (C) represented by the following formula (C): (A) R2-(g3-Z3-)^-G4—Z4—〇-CF2—CF—CF2 (B) R3-(g5—Z5)h-(G6)^—z6—G7—Y2 (c) C , where G1, G2, G3, G4, G5 and G6 respectively represent a phenylene group, an i 4 cyclohexylene group, a 2,6-anthranyl group or a 2,6-decahydronaphthyl group, and the 14-steep base-CH=selection The ground is replaced by a (tetra) atom or a cyano group of a part or all of a hydrogen atom, and the -CH 2 - of the stomach m is optionally substituted by ―s — or The I-stranded hexyl group-partial injury or all hydrogen atoms are replaced by a aryl group or an aryl group. G7 represents 1,4-phenylene, 3-fluoro] 4 'extension base, 5-fluoro-1,4 - phenyl, 3,5-mono-1,4-phenylene, 1 j '4-extended cyclohexyl, 2,6-extension erythro 2,6-decahydronaphthyl; #基4 Z1 , Z2, Z3, Z5 and Z6 respectively, the type of knife is not a single key, -C〇〇_, -〇-CH2CH2-, -CH=CH... 〇~, (^2)4—,—CHzO—, —, -(CH2)3〇-, -〇(CH, H2'~h2)3~, -ch=chch2〇-, -OCH2CH=CH- ' -c=r ^ 匕-卜, -cf2〇_4_〇 CF2_ ; 27 201022412 z represents a single bond or an alkyl group, and a part or all of the alkyl group Substituted by a halogen atom or a cyano group; R, R and R respectively represent R or r〇, r represents an alkyl group. The alkyl group optionally has an unsaturated bond, and the -CH2- moiety is derived from -〇1, _c〇- or - COO-substituted, or a part or all of the hydrogen atoms are replaced by a halogen atom or a cyano group; Χ^Χ2 and Y1 respectively represent hydrogen, fluorine, trifluoromethyl, trifluoromethoxy, -OCF2H or -OCFH2, The condition is that when hydrazine and & simultaneously hydrogen, Υ1 cannot be hydrogen, fluorine or -〇CFH2; Y represents fluorine, gas, -OCFH2, linear or branched alkyl or carbon having a carbon number ranging from 1 to 7. An oxy group or a dilute group having a carbon number ranging from 2 to 7, provided that when G7 is 3-fluoro-1,4-phenylene, γ2 is not fluorine, gas or -OCFH2; and a'c and d 0, 1 or 2, respectively, and c+d > 〇, b is 1, 2 or 3. When a is 2, each G1 and Z1 are the same or different, and when b is 2 or 3, 'each Each of G3 and Z3 is the same or different, and when c is 2, 'each G5 and Z5 are the same or different. 2. The liquid crystal composition according to claim 1, comprising 10 to 25 wt% of the compound (a), 5 to 45 wt% of the compound (B), and 45 to 80 wt% of the compound (〇. 3 The liquid crystal composition according to claim 1, wherein in the formula (A), the G1 and G2 represent a 1,4-phenylene group, a 3-fluoro-1,4-phenylene group, respectively. , a 5-fluoro-1,4-phenylene group, a 3,5-difluorophenylene group, or a 1,4-cyclohexylene group. The liquid crystal composition according to claim 3, wherein In the formula (A), X1 and X2 each represent hydrogen or fluorine, and Y1 represents fluorine, trifluoromethyl or trifluoromethoxy, provided that when X1 and X2 are hydrogen, Y1 is trifluoromethyl. The liquid crystal composition according to claim 4, wherein the compound (A) is selected from the group consisting of 〇F 29 201022412 F F F 30 201022412 6. According to the scope of the patent application, R1 represents R or RO, and one of the liquid crystal compositions of the combination of 5, wherein the R is selected from a linear or branched hospital having a carbon number range of 丨~7. a base or a burnt group having an unsaturated bond and a direct bond or a branch having a carbon number ranging from 2 to 7. The liquid crystal composition according to claim 6, wherein the compound (A) is selected from the group consisting of 31 201022412 c2h5 C4h9 C2h5 F F F c2h5- F C3H7 F -F 32 201022412 F F F F F or one of these combinations. The liquid crystal composition according to claim 1, wherein in the formula (B), the G3 and G4 represent 1,4-phenylene and 3-fluoro-1,4-extension, respectively. Phenyl, 5-fluoro-l, 4-phenylene, 3,5-difluoroa, phenyl or 14-cyclohexylene. 9. The liquid crystal composition according to claim 8, wherein in the formula (B), z4 represents a single bond. 10. The liquid crystal composition according to claim 9, wherein the compound (B) is selected from the group consisting of 33 201022412 F F F Cf2o-^ q—cf9—cf=cf, F 34 201022412 F 〇—cf2—cf=cf2 Or a combination of such a liquid crystal composition according to claim 10, wherein the compound (B) is selected from the group consisting of 35 201022412 F Or one of these combinations 12. The liquid crystal composition according to claim 11, wherein 'in the compound (B), R2 represents R or RO, and R is selected from a linear chain having a carbon number ranging from 1 to 7 or A branched base or a burnt group having an unsaturated bond and having a carbon number of 2 to 7 straight bonds or branches. The liquid crystal composition according to claim 12, wherein the compound (B) is selected from the group consisting of F 〇 - cf2 - CF = CF2 F , F o - cf2 - cf = cf2 F , 36 201022412 F C3H7 -cf2—cf=cf2 c3h7 c3h7 c4h9 O—cf2—cf=cf2 〇—cf2—cf=cf2 O—cf2—cf=cf2 or a combination of these. The liquid crystal composition according to the invention, wherein, in the compound (C) according to the scope of application of the patent, the G5, G6 and G7 respectively represent 1,4-phenylphenyl 3-fluoro-1,4-benzobenzene Base, 5-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene or 1,4-cyclohexyl. The liquid crystal composition according to claim 14, wherein the compound (C) is selected from the group consisting of 37 00^, 201022412 R3 R3 Y2 -00^0-, The liquid crystal composition according to claim 15, wherein the compound (C) is selected from the group consisting of 00^2 38 201022412 F Or a combination of these. 17. The liquid crystal composition according to claim 16, wherein in the gas (C), the Y2 represents a straight or branched alkyl group having a fluorine or a carbon number ranging from 7 to 7, and R is not R and r are selected from a linear or branched thio group having a carbon number range, or a linear or branched alkyl group having one unsaturated bond and having a carbon number ranging from 2 to 7. The liquid crystal composition according to claim 17, wherein the compound (C) is selected from the group consisting of F F 39 201022412 Compound (A) is selected from F F, c2U5^cy^D^cy~〇cF3. 40 201022412 The compound (B) is selected from one or a combination of the above 41 201022412 c4h9 o—CF2—CF=CF o—CF2—CF=CF 2 2 c3H7XZ}~0 O—cf2—cf=cf2 F F C3H7 c3h7 c3h7 c4h, O-cf2—cf=cf2 o—CF2—CF=CF 2 O-CF2—CF=CF 2 o—cf2—cf=cf2 or one of these combinations; and the compound (C) is selected from the group consisting of -c3h7, X: -C4H9 F 42 201022412 F Or a combination of these. The liquid crystal composition according to claim 19, wherein the compound (A) is selected from the group consisting of 43 201022412 F F, F F F F The compound (B) is selected from 44 201022412 Or one of these combinations; and Or a combination of these. 45