Search

CN-121991704-A - Liquid crystal composition with high dielectric constant

CN121991704ACN 121991704 ACN121991704 ACN 121991704ACN-121991704-A

Abstract

The invention provides a liquid crystal composition which has a higher dielectric constant value, is favorable for reducing the driving voltage of a liquid crystal material and further achieves the aim of energy conservation, and is composed of 10% -30% of a compound I1, 10% -30% of a compound I2, 10% -20% of a compound I3, 3% -15% of a compound I4, 10% -30% of a compound I5, 20% -40% of a compound I6 and 0% -20% of a compound I7.

Inventors

  • LI SHANSHAN
  • CHEN QUAN
  • DI HENGXIANG
  • ZHOU JIE
  • TANG HAO

Assignees

  • 晶美晟光电材料（南京）有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (8)

  1. 1.10 To 30 percent of compound I1, 10 to 30 percent of compound I2, 10 to 20 percent of compound I3, 3 to 15 percent of compound I4, 10 to 30 percent of compound I5, 20 to 40 percent of compound I6 and 0 to 20 percent of compound I7, The liquid crystal compounds I1-I7 are as follows: I1、 I2、 I3、 I4、 I5、 I6、 I7、 R 1 and R 1 ' are each independently selected from alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, alkenylalkoxy groups having 2 to 7 carbon atoms, cyclopentyl groups, or cyclopentyl groups substituted with alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, or alkenylalkoxy groups having 2 to 7 carbon atoms, the alkyl groups, the alkoxy groups, the alkenyl groups, and the alkenylalkoxy groups being straight-chain or branched alkyl groups, alkoxy groups, alkenyl groups, and alkenylalkoxy groups.
  2. 2. The liquid crystal composition with high dielectric constant according to claim 1, wherein R 1 is selected from alkyl or alkoxy groups with 2 to 5 carbon atoms.
  3. 3. The liquid crystal composition with high dielectric constant according to claim 1, wherein R 1 ' is selected from alkyl groups with 2 to 5 carbon atoms, alkoxy groups with 2 to 5 carbon atoms or alkenyl groups with 2 to 5 carbon atoms.
  4. 4. The liquid crystal composition with high dielectric constant according to claim 1, further comprising 0-20% of a stabilizer, wherein the stabilizer is one or more of compounds represented by general formulas S1-S4: S1、 S2、 S3、 S4、 wherein Y 1 is selected from H, F, an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, an alkenylalkoxy group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms, a halogenated alkenyl group having 2 to 7 carbon atoms, a halogenated alkenylalkoxy group having 2 to 7 carbon atoms, a cyclopentyl group, or a cyclopentyl group substituted with an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenylalkoxy group having 2 to 7 carbon atoms, the alkyl group, the alkoxy group, the alkenyl group, and the alkenylalkoxy group being linear or branched alkyl, alkoxy, alkenyl, and alkenylalkoxy groups.
  5. 5. The liquid crystal composition with high dielectric constant according to claim 1, wherein the liquid crystal composition is composed of 10% -20% of compound I1, 10% -20% of compound I2, 10% -20% of compound I3, 5% -15% of compound I4, 10% -30% of compound I5, 20% -40% of compound I6 and 0% -10% of compound I7.
  6. 6. The liquid crystal composition with high dielectric constant according to claim 1, wherein the liquid crystal composition further comprises 0-20% by mass of chiral agent.
  7. 7. The liquid crystal composition with high dielectric constant according to claim 1, further comprising 0-20% by mass of a polymerizable compound, wherein the polymerizable compound comprises the following components: Wherein, the -T 1 and-T 2 are each independently represented Or an epoxy group; -Q 1 -and-Q 2 -each independently represent a single bond or an alkyl group having 1 to 8 carbon atoms; -P 1 -and-P 2 -each independently represent a single bond, -O-, CO-, COO-, or-OCO-; k is 0,1 or 2; When k is 1, -Z 1 -represents a single bond 、—O—、—CO—、—COO—、—OCO—、—CH 2 O—、—OCH 2 —、—C 2 H 4 —、—CF 2 O—、—OCF 2 —、—C≡C—、—CH＝CH—、 When k is 2, -Z 1 -appears twice in the component, -Z 1 -each occurrence independently represents a single bond 、—O—、—CO—、—COO—、—OCO—、—CH 2 O—、—OCH 2 —、—C 2 H 4 —、—CF 2 O—、—OCF 2 —、—C≡C—、—CH＝CH—、 Representation of Wherein-CH 2 -on the cyclohexyl group may be substituted by O, or represents Wherein =ch-on the benzene ring may be substituted with N, H on the benzene ring may be substituted with F, or represents When the number k is 1, the number, Representation of Wherein-CH 2 -on the cyclohexyl group may be substituted by O, or represents Wherein =ch-on the benzene ring may be substituted with N, H on the benzene ring may be substituted with F, or represents When k is 2, two are included in the composition I.e. Two occurrences of the presence of the component(s), Each occurrence is independently Wherein-CH 2 -on the cyclohexyl group may be replaced by O, or Wherein =ch-on the benzene ring may be substituted by N, H on the benzene ring may be substituted by F, or
  8. 8. Use of the liquid crystal composition according to any one of claims 1 to 7 in a liquid crystal display material or a liquid crystal display device.

Description

Liquid crystal composition with high dielectric constant Technical Field The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and application thereof. Background In the 60 th century of the 20 th century, after the RCA company first found that the light transmission mode of liquid crystal was changed by electric stimulation, and then a liquid crystal display technology was released by applying the property, the liquid crystal was gradually paid great attention to people and rapidly developed to various fields. In 1966, after the DuPont has synthesized Kevlar fibers using aramid liquid crystals, the liquid crystal materials began an industrial process. Through rapid development for decades, the liquid crystal material has been widely applied to various fields such as display technology, optical storage equipment, solar cells and the like by virtue of the special properties, and the research scope is more over the fields such as chemistry, biology, information science and the like, so that the liquid crystal material becomes one of the favored and indispensable novel materials in the current society. With the continuous improvement of the resolution, refresh rate, contrast, brightness, response speed, etc. of the lcd, the energy consumption of the lcd is also increasing, and for the energy saving and environmental protection, a liquid crystal material with low driving voltage, which can reduce the operation energy consumption of the lcd, is needed. According to the driving voltage formulaIt is understood that the driving voltage is inversely proportional to the dielectric constant Δε, which means that the higher the dielectric constant Δε, the lower the driving voltage is, which is advantageous for energy saving. Disclosure of Invention The invention aims to provide a liquid crystal composition, which has a higher dielectric constant value, is favorable for reducing the driving voltage of a liquid crystal material and further achieves the aim of saving energy. The invention provides a liquid crystal composition with high dielectric constant, which is characterized by comprising 10% -30% of compound I1, 10% -30% of compound I2, 10% -20% of compound I3, 3% -15% of compound I4, 10% -30% of compound I5, 20% -40% of compound I6 and 0% -20% of compound I7, The liquid crystal compounds I1-I7 are as follows: I1、I2、I3、I4、I5、I6、I7、 R 1 and R 1' are each independently selected from alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, alkenylalkoxy groups having 2 to 7 carbon atoms, cyclopentyl groups, or cyclopentyl groups substituted with alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, or alkenylalkoxy groups having 2 to 7 carbon atoms, the alkyl groups, the alkoxy groups, the alkenyl groups, and the alkenylalkoxy groups being straight-chain or branched alkyl groups, alkoxy groups, alkenyl groups, and alkenylalkoxy groups. According to another aspect of the present invention, there is provided the use of the above liquid crystal composition in a liquid crystal display material or a liquid crystal display device. The liquid crystal composition has the beneficial effects that the liquid crystal composition has higher dielectric constant value, is favorable for reducing the driving voltage of a liquid crystal material, and further achieves the aim of saving energy. Detailed Description It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail with reference to examples. The application is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the application as claimed. In order to solve the above problems, in an exemplary embodiment of the present invention, there is provided a liquid crystal composition composed of 10% -30% of compound I1, 10% -30% of compound I2, 10% -20% of compound I3, 3% -15% of compound I4, 10% -30% of compound I5, 20% -40% of compound I6, and 0% -20% of compound I7, I1、I2、I3、I4、I5、I6、I7、 R 1 and R 1' are each independently selected from alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, alkenylalkoxy groups having 2 to 7 carbon atoms, cyclopentyl groups, or cyclopentyl groups substituted with alkyl groups having 1 to 7 carbon atoms, alkoxy groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, or alkenylalkoxy groups having 2 to 7 carbon atoms, the alkyl groups, the alkoxy groups, the alkenyl groups, and the alkenylalkoxy groups being straight-chain or branched alkyl groups, alkoxy groups, alkenyl groups, and alkenylalkoxy groups. The component I1 is a compound with low melting point a