TW202248401A - Negative dielectric anisotropic liquid crystal composition and use thereof - Google Patents
Negative dielectric anisotropic liquid crystal composition and use thereof Download PDFInfo
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Abstract
Description
本發明涉及一種液晶組合物，具體涉及一種向列相液晶組合物，更具體地涉及一種負介電各向異性液晶組合物及其應用；本發明所提供的液晶組合物具有大的展曲彈性常數和低的旋轉粘度，用於液晶顯示器中可提升液晶顯示器的對比度和回應速度。 The present invention relates to a liquid crystal composition, in particular to a nematic liquid crystal composition, more specifically to a negative dielectric anisotropy liquid crystal composition and its application; the liquid crystal composition provided by the present invention has large flexural elasticity Constant and low rotational viscosity, used in liquid crystal display can improve the contrast and response speed of liquid crystal display.
近年來，LCD顯示器作為最主流的顯示器，已廣泛用於各種產品中，其中負性液晶顯示器因為其獨有的高透過率特性，廣泛用於手機、筆記型電腦、平板電腦、電腦顯示器、電視等方面。 In recent years, LCD monitors, as the most mainstream displays, have been widely used in various products. Among them, negative LCDs are widely used in mobile phones, notebook computers, tablet computers, computer monitors, and TVs because of their unique high transmittance characteristics. etc.
目前，負性液晶顯示器存在的主要劣勢為回應速度較慢，如何改善回應速度成為負性液晶顯示器的重要課題，通過研究發現，液晶的旋轉粘度降低有助於改善液晶分子的回應速度，液晶的光學各向異性增加有助於降低顯示器面板液晶層厚度，從而改善顯示器的回應速度。 At present, the main disadvantage of negative liquid crystal display is the slow response speed. How to improve the response speed has become an important issue for negative liquid crystal display. Through research, it has been found that the reduction of the rotational viscosity of liquid crystal helps to improve the response speed of liquid crystal molecules. Increased optical anisotropy helps reduce the thickness of the liquid crystal layer of the display panel, thereby improving the response speed of the display.
FFS模式相對於VA模式，具有硬屏優勢，非常適用於當前採用觸控式螢幕方式的手機和筆記型電腦螢幕，但是FFS模式在對比度方面相對於VA模式較低。對於FFS模式，其暗態散射導致漏光增加，降低對比度(CR)，而影響液晶組合物散射的主要為液晶的有序度S和折射率ne(非尋常光折射率)、no(尋常光折射率)、△n(光學各向異性)，受液晶面板設計等因素影響，液晶的折射率特性很難調整，所以提升液晶的對比度主要在於如何提升液晶組合 物的有序度，液晶的有序度S主要與K11(展曲彈性常數)相關，K11越大、S越大。 Compared with VA mode, FFS mode has the advantages of hard screen, which is very suitable for mobile phones and notebook computer screens that currently use touch screens. However, FFS mode has lower contrast than VA mode. For the FFS mode, its dark state scattering leads to increased light leakage and reduced contrast (CR), while the main factors affecting the scattering of the liquid crystal composition are the order S of the liquid crystal and the refractive index ne (refractive index of extraordinary light), no (refractive index of ordinary light) rate), △n (optical anisotropy), affected by factors such as LCD panel design, the refractive index characteristics of liquid crystals are difficult to adjust, so improving the contrast of liquid crystals mainly lies in how to improve the combination of liquid crystals The degree of order of the liquid crystal, the degree of order S of the liquid crystal is mainly related to K11 (splay elastic constant), the larger the K11, the larger the S.
鑒於此，特提出本發明。 In view of this, the present invention is proposed.
本發明旨在提供一種負介電各向異性液晶組合物，該液晶組合物具有低的旋轉粘度和大的展曲彈性常數，以此實現改善液晶顯示器回應速度和對比度的目的。 The present invention aims to provide a liquid crystal composition with negative dielectric anisotropy, which has low rotational viscosity and large flexural elastic constant, so as to achieve the purpose of improving the response speed and contrast of liquid crystal displays.
具體地，本發明提供以下技術方案： Specifically, the present invention provides the following technical solutions:
本發明提供一種負介電各向異性液晶組合物，包括通式I所代表的化合物中的至少一種，通式II所代表的化合物中的至少一種，通式III所代表的化合物中的至少一種，通式IV所代表的化合物中的至少一種； The present invention provides a negative dielectric anisotropy liquid crystal composition, comprising at least one of the compounds represented by the general formula I, at least one of the compounds represented by the general formula II, and at least one of the compounds represented by the general formula III , at least one of the compounds represented by general formula IV;
其中，通式I中，R1代表C1~C12的直鏈烷基，其中一個或多個C原子可被
通式II中，R3、R4各自獨立地代表C1~C12的直鏈烷基、C1~C12的直鏈烷氧基或C2~C12的直鏈烯基；A1代表
通式III中，R5、R6各自獨立地代表C1~C12的直鏈烷基、C1~C12的直鏈烷氧基或C2~C12的直鏈烯基；A2代表
通式IV中，R7、R8各自獨立地代表C1~C12的直鏈烷基、C1~C12的直鏈烷氧基或C2~C12的直鏈烯基；A3、A4各自獨立地代表
將上述液晶組合物用於液晶顯示器中，可有效改善液晶顯示器的回應速度和對比度。 Using the liquid crystal composition above in a liquid crystal display can effectively improve the response speed and contrast of the liquid crystal display.
作為優選，通式I所代表的化合物選自IA或IB中的一種或多種： As preferably, the compound represented by general formula I is selected from one or more of IA or IB:
其中，R1代表C1~C7的直鏈烷基；R2代表C3~C7的直鏈烯基； Wherein, R 1 represents C 1 ~C 7 straight-chain alkyl; R 2 represents C 3 ~C 7 straight-chain alkenyl;
進一步地，通式I所代表的化合物選自IA1~IB5中的一種或多種： Further, the compound represented by general formula I is selected from one or more of IA1～IB5:
更進一步地，通式I所代表的化合物選自IA1、IA2、IA3、IA4、IA11、IA12、IA13、IA14、IA21、IA22、IB1、IB3、IB5中的一種或多種； Further, the compound represented by general formula I is selected from one or more of IA1, IA2, IA3, IA4, IA11, IA12, IA13, IA14, IA21, IA22, IB1, IB3, IB5;
作為最佳的技術方案，通式I所代表的化合物選自IA1、IA2、IA11、IA12、IB1、IB3中的一種或多種。 As the best technical solution, the compound represented by general formula I is selected from one or more of IA1, IA2, IA11, IA12, IB1, and IB3.
作為優選，通式II所代表的化合物選自IIA或IIB中的一種或多種： As preferably, the compound represented by general formula II is selected from one or more of IIA or IIB:
其中，R3、R4各自獨立地代表C1~C7的直鏈烷基、C1~C7的直鏈烷氧基或C2~C7的直鏈烯基； Wherein, R 3 and R 4 each independently represent a C 1 ~C 7 straight chain alkyl group, a C 1 ~C 7 straight chain alkoxy group or a C 2 ~C 7 straight chain alkenyl group;
進一步地，通式II所代表的化合物選自IIA1~IIB20中的一種或多種： Further, the compound represented by general formula II is selected from one or more of IIA1～IIB20:
更進一步地，通式II所代表的化合物選自IIA6、IIA8、IIA14、IIB1、IIB3、IIB6、IIB7、IIB8、IIB9、IIB11、IIB16中的一種或多種； Further, the compound represented by general formula II is selected from one or more of IIA6, IIA8, IIA14, IIB1, IIB3, IIB6, IIB7, IIB8, IIB9, IIB11, IIB16;
作為最佳的技術方案，通式II所代表的化合物選自式IIA6、IIA8、IIA14、IIB6、IIB8、IIB11、IIB16中的一種或多種。 As the best technical solution, the compound represented by general formula II is selected from one or more of formulas IIA6, IIA8, IIA14, IIB6, IIB8, IIB11, and IIB16.
作為優選，通式III所代表的化合物選自IIIA或IIIB中的一種或多種： As preferably, the compound represented by general formula III is selected from one or more of IIIA or IIIB:
其中，R5、R6各自獨立地代表C1~C7的直鏈烷基、C1~C7的直鏈烷氧基或C2~C7的直鏈烯基； Wherein, R 5 and R 6 each independently represent a straight chain alkyl group of C 1 ~C 7 , a straight chain alkoxy group of C 1 ~C 7 or a straight chain alkenyl group of C 2 ~C 7 ;
進一步地，通式III所代表的化合物選自IIIA1~IIIB35中的一種或多種： Further, the compound represented by general formula III is selected from one or more of IIIA1~IIIB35:
更進一步地，通式III所代表的化合物選自IIIA1、IIIA2、IIIA9、IIIA12、IIIA15、IIIA16、IIIA17、IIIA18、IIIA19、IIIA20、IIIA23、IIIA33、IIIB15、IIIB16、IIIB17、IIIB18、IIIB19、IIIB20、IIIB23、IIIB30中的一種或多種； Further, the compound represented by general formula III is selected from IIIA1, IIIA2, IIIA9, IIIA12, IIIA15, IIIA16, IIIA17, IIIA18, IIIA19, IIIA20, IIIA23, IIIA33, IIIB15, IIIB16, IIIB17, IIIB18, IIIB19, IIIB20, IIIB23 , one or more of IIIB30;
作為最佳的技術方案，通式III所代表的化合物選自IIIA9、IIIA12、IIIA15、IIIA16、IIIA19、IIIB15、IIIB16中的一種或多種。 As the best technical solution, the compound represented by general formula III is selected from one or more of IIIA9, IIIA12, IIIA15, IIIA16, IIIA19, IIIB15, IIIB16.
作為優選，通式IV所代表的化合物選自IVA~IVC中的一種或多種： As preferably, the compound represented by general formula IV is selected from one or more of IVA～IVC:
其中，R7、R8各自獨立地代表C1~C7的直鏈烷基、C1~C7的直鏈烷氧基或C2~C7的直鏈烯基； Wherein, R 7 and R 8 each independently represent a straight chain alkyl group of C 1 ~C 7 , a straight chain alkoxy group of C 1 ~C 7 or a straight chain alkenyl group of C 2 ~C 7 ;
進一步地，通式IV所代表的化合物選自IVA1~IVC32中的一種或多種： Further, the compound represented by general formula IV is selected from one or more of IVA1~IVC32:
更進一步地，通式IV所代表的化合物選自IVA2、IVA4、IVA5、IVA6、IVA8、IVA10、IVA15、IVA18、IVA20、IVA21、IVB14、IVB18、IVC6、IVC13、IVC23、IVC28中的一種或多種； Further, the compound represented by general formula IV is selected from one or more of IVA2, IVA4, IVA5, IVA6, IVA8, IVA10, IVA15, IVA18, IVA20, IVA21, IVB14, IVB18, IVC6, IVC13, IVC23, IVC28;
作為最佳的技術方案，通式IV所代表的化合物選自IVA2、IVA4、IVA6、IVA10、IVC23、IVC28中的一種或多種。 As the best technical solution, the compound represented by general formula IV is selected from one or more of IVA2, IVA4, IVA6, IVA10, IVC23, and IVC28.
作為優選，所述負介電各向異性液晶組合物還包括通式V所代表的化合物中的至少一種； Preferably, the negative dielectric anisotropy liquid crystal composition further includes at least one of the compounds represented by the general formula V;
其中，R9、R10各自獨立地代表C1~C12的直鏈烷基、C1~C12的直鏈烷氧基或C2~C12的直鏈烯基；L1、L2、L3、L4各自獨立地代表H或F； Wherein, R 9 and R 10 each independently represent a C 1 ~C 12 straight chain alkyl group, a C 1 ~C 12 straight chain alkoxy group or a C 2 ~C 12 straight chain alkenyl group; L 1 , L 2 , L 3 , L 4 each independently represent H or F;
進一步地，通式V所代表的化合物選自VA~VC中的一種或多種： Further, the compound represented by general formula V is selected from one or more of VA～VC:
其中，R9、R10各自獨立地代表C1~C7的直鏈烷基或C1~C7的直鏈烷氧基； Wherein, R 9 and R 10 each independently represent a straight-chain alkyl group of C 1 to C 7 or a straight-chain alkoxy group of C 1 to C 7 ;
更進一步地，通式V所代表的化合物選自VA1~VC30中的一種或多種： Further, the compound represented by general formula V is selected from one or more of VA1~VC30:
作為較佳的技術方案，通式V所代表的化合物選自VA3、VA7、VA8、VB5、VB6、VB7、VB10、VB12、VB13、VB14、VB15、VB17、VC13、VC15、VC21、VC22、VC23中的一種或多種。 As a preferred technical solution, the compound represented by general formula V is selected from VA3, VA7, VA8, VB5, VB6, VB7, VB10, VB12, VB13, VB14, VB15, VB17, VC13, VC15, VC21, VC22, VC23 one or more of.
作為最佳的技術方案，通式V所代表的化合物選自VB5、VB7、VB10、VB12、VB14、VB15、VB17、VC13、VC15、VC21、VC22、VC23中的一種或多種。 As the best technical solution, the compound represented by general formula V is selected from one or more of VB5, VB7, VB10, VB12, VB14, VB15, VB17, VC13, VC15, VC21, VC22, and VC23.
作為優選，所述負介電各向異性液晶組合物還包括通式VI所代表的化合物中的至少一種； Preferably, the negative dielectric anisotropy liquid crystal composition further includes at least one of the compounds represented by the general formula VI;
其中，R11、R12各自獨立地代表C1~C12的直鏈烷基或C1~C12的直鏈烷氧基； Wherein, R 11 and R 12 each independently represent a C 1 ~C 12 straight chain alkyl group or a C 1 ~C 12 straight chain alkoxy group;
進一步地，通式VI所代表的化合物選自VIA1~VIA16中的一種或多種： Further, the compound represented by general formula VI is selected from one or more of VIA1~VIA16:
更進一步地，通式VI所代表的化合物選自VIA5、VIA6、VIA7、VIA8、VIA10中的一種或多種。 Furthermore, the compound represented by general formula VI is selected from one or more of VIA5, VIA6, VIA7, VIA8, VIA10.
作為優選，所述負介電各向異性液晶組合物還包括通式VII所代表的化合物中的至少一種； Preferably, the negative dielectric anisotropy liquid crystal composition further includes at least one compound represented by the general formula VII;
其中，R13、R14各自獨立地代表C1~C12的直鏈烷基、C1~C12的直鏈烷氧基或C2~C12的直鏈烯基；A5代表反式1，4-環己基或1，4-亞苯基； Wherein, R 13 and R 14 each independently represent a C 1 ~C 12 straight chain alkyl group, a C 1 ~C 12 straight chain alkoxy group or a C2 ~ C12 straight chain alkenyl group; A 5 represents trans 1, 4-cyclohexyl or 1,4-phenylene;
進一步地，通式VII所代表的化合物選自VIIA~VIIB中的一種或多種： Further, the compound represented by general formula VII is selected from one or more of VIIA～VIIB:
其中，R13、R14各自獨立地代表C1~C7的直鏈烷基、C1~C7的直鏈烷氧基或C2~C7的直鏈烯基； Wherein, R 13 and R 14 each independently represent a straight chain alkyl group of C 1 ~C 7 , a straight chain alkoxy group of C 1 ~C 7 or a straight chain alkenyl group of C 2 ~C 7 ;
更進一步地，通式VII所代表的化合物選自VIIA1~VIIB55中的一種或多種： Further, the compound represented by general formula VII is selected from one or more of VIIA1~VIIB55:
作為最佳的技術方案，通式VII所代表的化合物選自式VIIA1、VIIA6、VIIA11、VIIA16、VIIA28、VIIA33、VIIA38、VIIA43、VIIB3、VIIB23、VIIB28、VIIB33、VIIB38中的一種或多種。 As the best technical solution, the compound represented by general formula VII is selected from one or more of formulas VIIA1, VIIA6, VIIA11, VIIA16, VIIA28, VIIA33, VIIA38, VIIA43, VIIB3, VIIB23, VIIB28, VIIB33, VIIB38.
本發明的負介電各向異性液晶組合物中，除了上述的化合物以外，也可以含有通常的抗氧化劑、紫外線吸收劑、光穩定劑或紅外線吸收劑等。 The negative dielectric anisotropy liquid crystal composition of the present invention may contain common antioxidants, ultraviolet absorbers, photostabilizers, infrared absorbers, and the like in addition to the above-mentioned compounds.
作為優選，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Preferably, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、3~40%的通式I所代表的化合物； (1), 3~40% of the compound represented by the general formula I;
(2)、1~40%的通式II所代表的化合物； (2), 1~40% of the compound represented by the general formula II;
(3)、1~50%的通式III所代表的化合物； (3), 1~50% of the compound represented by the general formula III;
(4)、10~70%的通式IV所代表的化合物； (4), 10~70% of the compound represented by the general formula IV;
(5)、0~60%的通式V~VII所代表的化合物； (5), 0~60% of the compound represented by the general formula V~VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、5~25%的通式I所代表的化合物； (1), the compound represented by the general formula I of 5 ~ 25%;
(2)、2~25%的通式II所代表的化合物； (2), 2~25% of the compound represented by the general formula II;
(3)、3~40%的通式III所代表的化合物； (3), 3~40% of the compound represented by the general formula III;
(4)、30~60%的通式IV所代表的化合物； (4), 30~60% of the compound represented by the general formula IV;
(5)、0~40%的通式V~VII所代表的化合物； (5), 0~40% of the compound represented by the general formula V~VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、6~20%的通式I所代表的化合物； (1), the compound represented by the general formula I of 6～20%;
(2)、3~19%的通式II所代表的化合物； (2), 3~19% of the compound represented by the general formula II;
(3)、4~36%的通式III所代表的化合物； (3), 4~36% of the compound represented by the general formula III;
(4)、35~54%的通式IV所代表的化合物； (4), 35~54% of the compound represented by the general formula IV;
(5)、0~34%的通式V~VII所代表的化合物； (5), 0~34% of the compound represented by the general formula V~VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、5~20%的通式I所代表的化合物； (1), 5~20% of the compound represented by the general formula I;
(2)、5~20%的通式II所代表的化合物； (2), 5~20% of the compound represented by the general formula II;
(3)、25~40%的通式III所代表的化合物； (3), 25~40% of the compound represented by the general formula III;
(4)、30~55%的通式IV所代表的化合物； (4), 30~55% of the compound represented by the general formula IV;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、10~15%的通式I所代表的化合物； (1), the compound represented by the general formula I of 10～15%;
(2)、9~15%的通式II所代表的化合物； (2), 9~15% of the compound represented by the general formula II;
(3)、29~36%的通式III所代表的化合物； (3), 29~36% of the compound represented by the general formula III;
(4)、35~48%的通式IV所代表的化合物； (4), 35~48% of the compound represented by the general formula IV;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、4~25%的通式I所代表的化合物； (1), the compound represented by the general formula I of 4～25%;
(2)、2~25%的通式II所代表的化合物； (2), 2~25% of the compound represented by the general formula II;
(3)、3~40%的通式III所代表的化合物； (3), 3~40% of the compound represented by the general formula III;
(4)、30~60%的通式IV所代表的化合物； (4), 30~60% of the compound represented by the general formula IV;
(5)、0~25%的通式V所代表的化合物； (5), 0~25% of the compound represented by the general formula V;
(6)、0~25%的通式VI所代表的化合物； (6), 0~25% of the compound represented by the general formula VI;
(7)、0~20%的通式VII所代表的化合物； (7), 0~20% of the compound represented by the general formula VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、6~20%的通式I所代表的化合物； (1), the compound represented by the general formula I of 6～20%;
(2)、3~19%的通式II所代表的化合物； (2), 3~19% of the compound represented by the general formula II;
(3)、4~36%的通式III所代表的化合物； (3), 4~36% of the compound represented by the general formula III;
(4)、35~54%的通式IV所代表的化合物； (4), 35~54% of the compound represented by the general formula IV;
(5)、0~21%的通式V所代表的化合物； (5), 0~21% of the compound represented by the general formula V;
(6)、0~21%的通式VI所代表的化合物； (6), 0~21% of the compound represented by the general formula VI;
(7)、0~14%的通式VII所代表的化合物； (7), 0~14% of the compound represented by the general formula VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、5~25%的通式I所代表的化合物； (1), 5~25% of the compound represented by the general formula I;
(2)、2~20%的通式II所代表的化合物； (2), 2~20% of the compound represented by the general formula II;
(3)、8~32%的通式III所代表的化合物； (3), 8~32% of the compound represented by the general formula III;
(4)、32~57%的通式IV所代表的化合物； (4), 32~57% of the compound represented by the general formula IV;
(5)、1~25%的通式V所代表的化合物； (5), 1~25% of the compound represented by the general formula V;
(6)、0~20%的通式VI所代表的化合物； (6), 0~20% of the compound represented by the general formula VI;
(7)、0~10%的通式VII所代表的化合物； (7), 0~10% of the compound represented by the general formula VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、9~20%的通式I所代表的化合物； (1), 9~20% of the compound represented by the general formula I;
(2)、3~15%的通式II所代表的化合物； (2), 3~15% of the compound represented by the general formula II;
(3)、12~27%的通式III所代表的化合物； (3), 12~27% of the compound represented by the general formula III;
(4)、37~52%的通式IV所代表的化合物； (4), 37~52% of the compound represented by the general formula IV;
(5)、2~21%的通式V所代表的化合物； (5), 2~21% of the compound represented by the general formula V;
(6)、0~17%的通式VI所代表的化合物； (6), 0~17% of the compound represented by the general formula VI;
(7)、0~4%的通式VII所代表的化合物； (7), 0~4% of the compound represented by the general formula VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、3~25%的通式I所代表的化合物； (1), 3~25% of the compound represented by the general formula I;
(2)、3~25%的通式II所代表的化合物； (2), 3~25% of the compound represented by the general formula II;
(3)、3~40%的通式III所代表的化合物； (3), 3~40% of the compound represented by the general formula III;
(4)、30~60%的通式IV所代表的化合物； (4), 30~60% of the compound represented by the general formula IV;
(5)、0~25%的通式VI所代表的化合物； (5), 0~25% of the compound represented by the general formula VI;
(6)、0~19%的通式VII所代表的化合物； (6), 0~19% of the compound represented by the general formula VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、4~19%的通式I所代表的化合物； (1), the compound represented by the general formula I of 4～19%;
(2)、4~19%的通式II所代表的化合物； (2), 4~19% of the compound represented by the general formula II;
(3)、4~36%的通式III所代表的化合物； (3), 4~36% of the compound represented by the general formula III;
(4)、35~54%的通式IV所代表的化合物； (4), 35~54% of the compound represented by the general formula IV;
(5)、0~21%的通式VI所代表的化合物； (5), 0~21% of the compound represented by the general formula VI;
(6)、0~14%的通式VII所代表的化合物； (6), 0~14% of the compound represented by the general formula VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、5~20%的通式I所代表的化合物； (1), 5~20% of the compound represented by the general formula I;
(2)、3~25%的通式II所代表的化合物； (2), 3~25% of the compound represented by the general formula II;
(3)、3~25%的通式III所代表的化合物； (3), 3~25% of the compound represented by the general formula III;
(4)、32~60%的通式IV所代表的化合物； (4), 32~60% of the compound represented by the general formula IV;
(5)、0~15%的通式V所代表的化合物； (5), 0~15% of the compound represented by the general formula V;
(6)、10~25%的通式VI所代表的化合物； (6), 10~25% of the compound represented by the general formula VI;
(7)、0~18%的通式VII所代表的化合物； (7), 0~18% of the compound represented by the general formula VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、6~15%的通式I所代表的化合物； (1), the compound represented by the general formula I of 6～15%;
(2)、4~19%的通式II所代表的化合物； (2), 4~19% of the compound represented by the general formula II;
(3)、4~19%的通式III所代表的化合物； (3), 4~19% of the compound represented by the general formula III;
(4)、37~54%的通式IV所代表的化合物； (4), 37~54% of the compound represented by the general formula IV;
(5)、0~11%的通式V所代表的化合物； (5), 0~11% of the compound represented by the general formula V;
(6)、13~21%的通式VI所代表的化合物； (6), 13~21% of the compound represented by the general formula VI;
(7)、0~14%的通式VII所代表的化合物； (7), 0~14% of the compound represented by the general formula VII;
進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Further, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、6~25%的通式I所代表的化合物； (1), the compound represented by the general formula I of 6～25%;
(2)、2~20%的通式II所代表的化合物； (2), 2~20% of the compound represented by the general formula II;
(3)、9~40%的通式III所代表的化合物； (3), 9~40% of the compound represented by the general formula III;
(4)、30~55%的通式IV所代表的化合物； (4), 30~55% of the compound represented by the general formula IV;
(5)、0~25%的通式V所代表的化合物； (5), 0~25% of the compound represented by the general formula V;
(6)、0~5%的通式VII所代表的化合物； (6), 0~5% of the compound represented by the general formula VII;
更進一步地，所述負介電各向異性液晶組合物包含以下重量百分比的組分： Furthermore, the negative dielectric anisotropy liquid crystal composition comprises the following components by weight percentage:
(1)、10~20%的通式I所代表的化合物； (1), 10~20% of the compound represented by the general formula I;
(2)、3~15%的通式II所代表的化合物； (2), 3~15% of the compound represented by the general formula II;
(3)、12~36%的通式III所代表的化合物； (3), 12~36% of the compound represented by the general formula III;
(4)、35~52%的通式IV所代表的化合物； (4), 35~52% of the compound represented by the general formula IV;
(5)、0~21%的通式V所代表的化合物； (5), 0~21% of the compound represented by the general formula V;
(6)、0~1%的通式VII所代表的化合物。 (6), 0~1% of the compound represented by the general formula VII.
本發明提供的通式I所代表的化合物具有大的負介電各向異性以及較大的光學各向異性，對於提升液晶組合物的負介電各向異性以及光學各向 異性非常有效；本發明提供的通式II所代表的化合物為兩環負介電各向異性液晶化合物，該類化合物具有較大的負介電各向異性和優異的互溶性；本發明提供的通式III所代表的化合物為含有為三環負介電各向異性液晶化合物，該類化合物具有較大的負介電各向異性和高的清亮點；本發明提供的通式IV所代表的化合物為兩環中性化合物，該類化合物具有低的旋轉粘度。本發明通過通式I所代表的烯類噻吩單體增加液晶組合物的介電各向異性和光學各向異性，降低負性單體使用；通過通式IV所代表的化合物，降低液晶組合物的旋轉粘度，進而提升液晶顯示器的回應時間。 The compound represented by the general formula I provided by the present invention has large negative dielectric anisotropy and large optical anisotropy, and is useful for improving the negative dielectric anisotropy and optical anisotropy of liquid crystal compositions. Anisotropy is very effective; the compound represented by the general formula II provided by the invention is a two-ring negative dielectric anisotropy liquid crystal compound, and this type of compound has larger negative dielectric anisotropy and excellent mutual solubility; the present invention provides The compound represented by general formula III contains tricyclic negative dielectric anisotropy liquid crystal compound, which has relatively large negative dielectric anisotropy and high clearing point; the general formula IV represented by the present invention The compound is a two-ring neutral compound with low rotational viscosity. The present invention increases the dielectric anisotropy and optical anisotropy of the liquid crystal composition through the ethylenic thiophene monomer represented by the general formula I, and reduces the use of negative monomers; through the compound represented by the general formula IV, the liquid crystal composition is reduced The rotational viscosity, thereby improving the response time of the LCD.
本發明所述負介電各向異性液晶組合物的製備方法無特殊限制，可採用常規方法將兩種或多種化合物混合進行生產，如通過在高溫下混合不同組分並彼此溶解的方法製備，其中，將液晶組合物溶解在用於該化合物的溶劑中並混合，然後在減壓下蒸餾出該溶劑；或者本發明所述負介電各向異性液晶組合物可按照常規的方法製備，如將其中含量較小的組分在較高的溫度下溶解在含量較大的主要組分中，或將各所屬組分在有機溶劑中溶解，如丙酮、氯仿或甲醇等，然後將溶液混合去除溶劑後得到。 The preparation method of the negative dielectric anisotropic liquid crystal composition of the present invention is not particularly limited, and two or more compounds can be mixed for production by a conventional method, such as by mixing different components at high temperature and dissolving each other. Wherein, the liquid crystal composition is dissolved in the solvent used for the compound and mixed, and then the solvent is distilled off under reduced pressure; or the negative dielectric anisotropy liquid crystal composition of the present invention can be prepared according to a conventional method, such as Dissolve the components with a small content in the main component with a large content at a higher temperature, or dissolve each component in an organic solvent, such as acetone, chloroform or methanol, etc., and then mix the solution to remove obtained after solvent.
本發明所述的負介電各向異性液晶組合物具有低的旋轉粘度和大的彈性常數，進而具有低的旋轉粘度與彈性常數的比值，其在液晶顯示器中的使用能明顯改善液晶顯示器的回應速度，有效地改善顯示效果。 The negative dielectric anisotropy liquid crystal composition of the present invention has low rotational viscosity and large elastic constant, and then has the ratio of low rotational viscosity and elastic constant, and its use in liquid crystal display can obviously improve the performance of liquid crystal display The response speed can effectively improve the display effect.
本發明同時提供上述負介電各向異性液晶組合物在液晶顯示器中的應用。 The present invention also provides the application of the above-mentioned negative dielectric anisotropy liquid crystal composition in a liquid crystal display.
以下實施例用於說明本發明，但不用來限制本發明的範圍。 The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
除非另有說明，本發明中百分比為重量百分比；溫度單位為攝氏度；△n代表光學各向異性(25℃)；ε ∥和ε ⊥分別代表平行和垂直介電常數(25℃，1000Hz)；△ε代表介電各向異性(25℃，1000Hz)；γ 1代表旋轉粘度(mPa.s，25℃)；Cp代表液晶組合物的清亮點(℃)；K11、K22、K33分別代表展曲、扭曲和彎曲彈性常數(pN，25℃)。 Unless otherwise specified, percentages in the present invention are percentages by weight; temperature units are degrees Celsius; Δn represents optical anisotropy (25°C); ε ∥ and ε ⊥ represent parallel and perpendicular dielectric constants (25°C, 1000Hz); Δε stands for dielectric anisotropy (25°C, 1000Hz); γ 1 stands for rotational viscosity (mPa.s, 25°C); Cp stands for clearing point of liquid crystal composition (°C); K 11 , K 22 , K 33 respectively Represents splay, torsion and bending elastic constants (pN, 25°C).
以下各實施例中，液晶化合物中基團結構用表1所示代碼表示。 In the following examples, the group structures in liquid crystal compounds are represented by the codes shown in Table 1.
以如下化合物結構為例： Take the following compound structure as an example:
表示為：E1OSO2V； Expressed as: E1OSO2V;
表示為：3CPW02； Expressed as: 3CPW02;
以下各實施例中，液晶組合物的製備均採用熱溶解方法，包括以下步驟：用天平按重量百分比稱量液晶化合物，其中稱量加入順序無特定要求，通常以液晶化合物熔點由高到低的順序依次稱量混合，在60~100℃下加熱攪拌使得各組分熔解均勻，再經過濾、旋蒸，最後封裝即得目標樣品。 In each of the following examples, the preparation of the liquid crystal composition adopts the thermal dissolution method, including the following steps: use a balance to weigh the liquid crystal compound by weight percentage, wherein there is no specific requirement for the order of weighing and adding, and the melting point of the liquid crystal compound is usually measured from high to low. Sequentially weigh and mix, heat and stir at 60~100°C to make each component melt evenly, then filter, rotary steam, and finally package to obtain the target sample.
以下各實施例中，液晶組合物中各組分的重量百分比及液晶組合物的性能參數見下述表格。 In the following examples, the weight percentage of each component in the liquid crystal composition and the performance parameters of the liquid crystal composition are shown in the following tables.
實施例1 Example 1
實施例2 Example 2
實施例3 Example 3
實施例4 Example 4
實施例5 Example 5
實施例6 Example 6
實施例7 Example 7
實施例8 Example 8
實施例9 Example 9
實施例10 Example 10
實施例11 Example 11
實施例12 Example 12
實施例13 Example 13
實施例14 Example 14
實施例15 Example 15
實施例16 Example 16
實施例17 Example 17
實施例18 Example 18
實施例19 Example 19
實施例20 Example 20
實施例21 Example 21
對比例1 Comparative example 1
將實施例8與對比例1所得液晶組合物的各性能參數值進行匯總比較，參見表24。 The values of various performance parameters of the liquid crystal composition obtained in Example 8 and Comparative Example 1 were summarized and compared, see Table 24.
經比較可知：與對比例1相比，實施例8提供的液晶組合物具有更低的旋轉粘度；相對於對比例1，實施例8的γ 1降低11%左右，即用於液晶顯示器中，實施例8較對比例1可以加快11%左右的回應速度。 It can be known by comparison: compared with Comparative Example 1, the liquid crystal composition provided by Example 8 has a lower rotational viscosity; compared with Comparative Example 1, the γ1 of Example 8 is reduced by about 11%, that is, it is used in liquid crystal displays, Compared with Comparative Example 1, Example 8 can speed up the response speed by about 11%.
由以上實施例可知，本發明所提供的液晶組合物具有低的旋轉粘度與大的光學各向異性，用顯示器中可有效改善液晶顯示器的回應速度。因此，本發明所提供的液晶組合物適用於液晶顯示裝置，能夠明顯提升液晶顯示器的回應速度特性。 It can be seen from the above examples that the liquid crystal composition provided by the present invention has low rotational viscosity and large optical anisotropy, and can effectively improve the response speed of liquid crystal displays when used in displays. Therefore, the liquid crystal composition provided by the present invention is suitable for liquid crystal display devices, and can significantly improve the response speed characteristics of the liquid crystal display.
雖然，上文中已經用一般性說明、具體實施方式及試驗，對本發明作了詳盡的描述，但在本發明基礎上，可以對之作一些修改或改進，這對本領域技術人員而言是顯而易見的。因此，在不偏離本發明精神的基礎上所做的這些修改或改進，均屬於本發明要求保護的範圍。 Although, the present invention has been described in detail with general description, specific implementation and test above, but on the basis of the present invention, some modifications or improvements can be made to it, which will be obvious to those skilled in the art . Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.
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