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TN type liquid crystal material mixture

A technology of liquid crystal materials and mixtures, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of simple operation, short preparation cycle, and reduced production costs

Inactive Publication Date: 2011-08-17
SHIJIAZHUANG GUODA INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]Although biphenylcyanide liquid crystals have high Δε and good electro-optical properties, studies have shown that this series of compounds are easy to introduce ionic impurities, and the cost is high

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the research and development process of the present invention.

[0034] In order to reduce the production cost of this TN type liquid crystal material, the present invention no longer uses two biphenylene cyanide monomers with higher cost,

[0035]

[0036] Because the optical birefringence Δn of the biphenyl cyanide monomer compound is larger (about 0.180 or so), so the consumption of two ester compounds with smaller optical birefringence Δn is reduced simultaneously in the mixture of the present invention, they are

[0037]

[0038] At the same time, adding or adjusting the dosage of two ester compounds with low cost and moderate optical birefringence Δn, they are

[0039]

[0040]

[0041] After taking the above measures, the stability of the optical birefringence Δn in the liquid crystal mixture is finally maintained.

[0042] Due to the removal of the two biphenylcyanide compound...

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Abstract

The invention discloses a TN type liquid crystal material mixture which belongs to the chemical field. The mixture comprises 16 percent of propylbenzoic acid para-pentyl phenolic ester, 5 percent of pentylbiphenyl nitrile, 19 percent of para-methoxybenzoic acid para-pentyl phenolic ester, 4 percent of p-toluic acid para-pentyl phenolic ester, 10 percent of para-pentyl benzoic acid para-pentyl phenolic ester, 4 percent of para-pentyl benzoic acid para-cyano diphenol ester, 17 percent of trans-ethyl cyclohexyl acid para-cyano diphenol ester, 10 percent of p-ethylbenzoic acid para-cyano diphenolester and 15 percent of para-pentyl benzoic acid para-cyano diphenol ester. Through the improvement of the formula of TN type liquid crystal mixed material, the biphenyl nitriles liquid crystal with higher cost in present formula is removed and is substituted by ester liquid crystal with relative low price. Under the premise that the parameters of mixed crystal all satisfy the display requirement, the production cost is lowered effectively. And the requirements of liquid crystal display manufacturers are satisfied.

Description

technical field [0001] The invention relates to a liquid crystal material for display, in particular to a mixture of TN type liquid crystal materials. Background technique [0002] Liquid crystal (Liquid Crystal) has both the fluidity of liquid and the birefringence of crystal, so it is called liquid crystal, and it is one of the basic materials of liquid crystal display (Liquid Crystal Display). In the field of display applications, the invention of twisted liquid crystal device TN (Twisted Nematic Cell) makes the use of liquid crystals epoch-making. The TN mode is widely used, and can be used to make liquid crystal displays with low voltage, low power consumption, and long life. The TN liquid crystal material can be prepared by using liquid crystal monomers such as alkyl biphenylcyanide and alkyl cyanophenol ester of benzoate. For example, the formula currently used is generally cyanobiphenyl liquid crystal, and its formula is generally as follows (the number behind the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/42
Inventor 马维宏
Owner SHIJIAZHUANG GUODA INDAL
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