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Liquid crystal low polymer, composition for synthesis, preparation method and liquid crystal material

A technology of liquid crystal oligomers and compositions, which is applied in the fields of liquid crystal materials and their synthesis, synthetic compositions, liquid crystal oligomers, and preparations, can solve problems such as loss of anisotropy and influence on display effects, and achieve easy reaction conditions The effect of control, wide application prospects, and orientation stability

Inactive Publication Date: 2012-09-26
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Liquid crystal material is the core part of liquid crystal display devices. Most of the existing liquid crystal materials for display are used at room temperature. Even the highest operating temperature is only about 80°C. However, in special fields such as aviation or military, instruments may be required to operate at higher It is obvious that the original display liquid crystal material has changed from a liquid crystal state to a transparent liquid or even evaporated at this temperature, losing its original anisotropy, which will seriously affect the display effect. , so it is necessary to develop liquid crystal materials that can be used at high temperatures

Method used

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  • Liquid crystal low polymer, composition for synthesis, preparation method and liquid crystal material
  • Liquid crystal low polymer, composition for synthesis, preparation method and liquid crystal material
  • Liquid crystal low polymer, composition for synthesis, preparation method and liquid crystal material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] According to the preparation method described in literature R.G.Bryant, B.J.Jensen, and P.M.Hergenrother, Polym.Prepr., 33 (1), 910 (1992), according to the following reaction formula, with p-bromobenzoyl chloride (Beijing Chemical Reagent No. 1 Factory , analytically pure) and fluorobenzene (Beijing Chemical Reagent No. 1 Factory, analytically pure) as raw materials, with aluminum trichloride (Shanghai Reagent No. 4 Factory, analytically pure) as a catalyst, 4-fluoro-4' Bromobenzophenone, then in Pd / Cu catalyst system (0.1g P(Ph) 3 , 0.05g PdCl 2 (PPh 3 ) 2 And 0.05g CuI is dissolved in about 200ml triethylamine (TEA) and obtains (wherein Ph is phenyl), and described medicine is all purchased from Aldrich.Chemical. Acetylene (Aldrich.Chemical.Copany.Inc., analytically pure) was coupled and recrystallized to obtain 4-fluoro-4'-phenylethynylbenzophenone (FPEB).

[0039]

[0040]With biphenyldiphenol monomer 0.005mol (0.9311g, Dalian Chemical Plant, analytically pu...

Embodiment 2

[0042] Except that biphenol is replaced by equimolar 3,3'-dimethylbiphenol (Dalian Chemical Plant, analytically pure), the same operation as in Example 1 was performed to obtain 3.76g of phenylacetylene-capped liquid crystal Oligomers, about 89% yield.

Embodiment 3

[0044] Except that the organic solvent N-methylpyrrolidone (NMP) is replaced by an equal volume of sulfolane (TMS) (Jinzhou Refinery, industrially pure), the same operation as in Example 1 is performed to obtain 3.47g of phenylacetylene-capped liquid crystal oligomers. The yield is about 85%.

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Abstract

The invention provides a liquid crystal low polymer, a composition for synthesis, a preparation method and a liquid crystal material. The liquid crystal low polymer is disclosed as the following chemical formula, wherein the substituent group R is hydrogen or methyl group. The liquid crystal low polymer has the advantages of high glass transition temperature, favorable heat resistance and low viscosity, and has a self-crosslinkable group; and the liquid crystal low polymer also has thermal self-crosslinking property and high heat stability of the thermosetting material.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials and their synthesis, and in particular provides a liquid crystal oligomer, a composition for synthesis, a preparation method and a liquid crystal material. Background technique [0002] Liquid crystal display, or LCD (Liquid Crystal Display), is a flat and ultra-thin display device, which consists of a certain number of color or black and white pixels, placed in front of the light source or reflective surface. Liquid crystal display has the advantages of low power consumption, thin body, low radiation, soft picture and not hurting eyes, so it is favored by engineers and is suitable for electronic equipment that uses batteries. [0003] Liquid crystal material is the core part of liquid crystal display devices. Most of the existing liquid crystal materials for display are used at room temperature. Even the highest operating temperature is only about 80°C. However, in special fields...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/84C07C45/64C09K19/18C08G65/38
CPCC08G2650/66C08G2650/60C09K19/20C08G65/4012
Inventor 严巍王丹
Owner BOE TECH GRP CO LTD
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