Polymerizable liquid crystal composition and application thereof

A technology for polymerizing liquid crystals and polymer compounds, used in negative liquid crystal compositions and their applications, polymerizable liquid crystal compositions and their application fields, can solve the problems of difficult complete reaction of RM, poor display, easy afterimages, etc., and achieve low RM residue, moderate dielectric anisotropy, good low temperature mutual solubility

Pending Publication Date: 2022-03-22
重庆汉朗精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of polymerizable liquid crystal compounds in PSVA liquid crystals, it is difficult for RM to completely react under the process co

Method used

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  • Polymerizable liquid crystal composition and application thereof
  • Polymerizable liquid crystal composition and application thereof
  • Polymerizable liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The synthesis of compound LDT-1, its specific preparation process is as follows:

[0091]

[0092] (1) Synthesis of LDT-1-2

[0093] Add 150ml of THF to a 500ml reaction flask, under the protection of nitrogen, add 23.8g (0.1mol) and 150ml of tetrahydrofuran to the reaction flask, and add 0.15mol of n-butyllithium n-hexane solution dropwise at -70~-80℃ under temperature control. Temperature controlled reaction for 1 hour, 28.2 g of triisopropyl borate was added dropwise at temperature controlled at -60~-70 °C, kept at temperature for 1 h, and then returned to -20 °C naturally. Add 400ml of 2M hydrochloric acid aqueous solution for acidification, perform conventional post-treatment, and recrystallize petroleum ether to obtain light yellow solid compound LDT-1-1, weight 24g, HPLC: 99.8%, yield: 85%.

[0094] (2) Synthesis of LDT-1-4

[0095] Add 28g of LDT-1-2, 100ml of DMF, 50ml of water, 27.6g of anhydrous potassium carbonate, LDT-1-336g, and 0.5g of palladium tetr...

Embodiment 2

[0104] The synthesis of LDT-2, its specific preparation process is as follows:

[0105]

[0106] (1) Synthesis of LDT-2-2

[0107] Add 150ml of THF to a 500ml reaction flask, under the protection of nitrogen, add 28.2g, 150ml of tetrahydrofuran to the reaction flask, add 0.15mol of n-butyllithium n-hexane solution dropwise at -70~-80°C under temperature control, and complete the temperature control reaction 1 28.2 g of triisopropyl borate was added dropwise at -60 to -70°C under temperature control, kept for 1 hour, and then returned to -20°C naturally. Add 400ml of 2M hydrochloric acid aqueous solution for acidification, perform conventional post-treatment, and recrystallize petroleum ether to obtain light yellow solid compound LDT-1-1, weight 27.1g, HPLC: 99.8%, yield: 83%.

[0108] (2) Synthesis of LDT-2-3

[0109] Add 32.6g of LDT-2-2, 100ml of DMF, 50ml of water, 27.6g of anhydrous potassium carbonate, 36g of LDT-1-3, 0.5g of palladium tetrakistriphenylphosphine into...

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PUM

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Abstract

The invention relates to a polymerizable liquid crystal composition and application thereof, and belongs to the field of liquid crystal materials. The liquid crystal composition comprises at least one polymerizable compound shown in a general formula I and at least one compound with a dibenzothiophene structure, and the structure of the compound is shown in a general formula II. The adopted compounds have good low-temperature intersolubility, moderate dielectric anisotropy and refractive index anisotropy and wide applicability. The liquid crystal composition is good in low-temperature intersolubility and large in elastic constant, and the response time is shortened.

Description

technical field [0001] The invention relates to a negative liquid crystal composition and its application, in particular to a polymerizable liquid crystal composition and its application, and belongs to the field of liquid crystal materials. Background technique [0002] Liquid crystal display devices are used in various home appliances including clocks and calculators, measuring equipment, automotive panels, word processors, electronic notebooks, printers, computers, and televisions. As liquid crystal display methods, the representative methods are TN (twisted nematic) type, STN (super twisted nematic) type, DS (dynamic light scattering) type, GH (guest-host) type, IPS (in-plane switching) type, OCB (Optically Compensated Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical) type, or FLC (Ferroelectric Liquid Crystal) or the like. Also, examples of driving methods for liquid crystal displays include stati...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/34C07D333/76G02F1/1333
CPCC09K19/44C09K19/3491C07D333/76G02F1/1333
Inventor 史志兵孙刚
Owner 重庆汉朗精工科技有限公司
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