Photoreactive Polymer And Preparation Method Thereof

A technology of photoreactivity and polymer, which is applied in the field of alignment layer, can solve the problems of liquid crystal display device contrast degradation, insufficient orientation, slow photoreaction speed, etc., and achieve improved photoreaction speed, improved production efficiency, and excellent thermal stability sexual effect

Active Publication Date: 2015-07-08
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such photoreactive polymers still have problems such as insufficient orientation, low process efficiency due to slow photoreaction speed, or deterioration of contrast of liquid crystal display devices.

Method used

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  • Photoreactive Polymer And Preparation Method Thereof
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  • Photoreactive Polymer And Preparation Method Thereof

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preparation example Construction

[0092] On the other hand, another embodiment of the present invention provides a method for preparing the photoreactive polymer. An embodiment of the preparation method includes, in the presence of a catalyst composition comprising a precatalyst having a Group 10 transition metal and a cocatalyst, addition polymerizing a monomer represented by Chemical Formula 1 to form a repeating unit represented by Chemical Formula 3 A step of.

[0093] [chemical formula 1]

[0094]

[0095] In the chemical formula 1, p, R 1 , R 2 , R 3 and R 4 as defined in Chemical Formula 3.

[0096] At this time, the polymerization reaction may be performed at a temperature of 10°C to 200°C. If the reaction temperature is lower than 10°C, the polymerization activity will be reduced, and if it is higher than 200°C, the catalyst will be decomposed, so it is not preferable.

[0097]Also, the cocatalyst may comprise a first cocatalyst selected from the group consisting of a first cocatalyst for pr...

Embodiment 1

[0131] : aggregation of

[0132] In a 250mL Schlenk (Schlenk) flask, add 1.26g (3mmol) and 3 mL of toluene refined with solvent. Then in the flask, 6.73㎎Pd(OAc) dissolved in 1 mL of dichloromethane was added as a catalyst 2 and 7.76 mg of tricyclohexylphosphine, 6.53 mg of dimethylanilinium tetrakiss (pentafluorophenyl) borate was added as a cocatalyst, and the reaction was stirred at 90° C. for 18 hours.

[0133] After reacting for 18 hours, the reactant was put into excess ethanol to obtain a white polymer precipitate. The precipitate was filtered with a glass funnel to collect the polymer, and the collected polymer was dried in a vacuum oven at 60° C. for 24 hours to obtain 1.19 g of polymer (Mw=31,000; PDI=1.7; yield=94%). The 1HNMR data of the polymkeric substance that makes in embodiment 1 is expressed in figure 1 middle.

Embodiment 2

[0134] : aggregation of

[0135] In a 250 mL schlenk flask, add 3.0 g (6.69 mmol) as a monomer and 4 mL of toluene refined with solvent. Then in the flask, 0.75㎎Pd(OAc)2 and 0.86mg tricyclohexylphosphine dissolved in 1mL of dichloromethane were added as a catalyst, and 0.72mg dimethylaniliniumtetrakis(pentafluorophenyl)boron was added as a cocatalyst. Acid acid, stirred and reacted at 90°C for 18 hours.

[0136] After reacting for 18 hours, the reactant was put into excess ethanol to obtain a white polymer precipitate. Use a glass funnel to filter the precipitate to collect the polymer, and dry the collected polymer in a vacuum oven at 60° C. for 24 hours to obtain 2.55 g of polymer (Mw=56,000; PDI=1.9; yield=85%) .

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Abstract

PROBLEM TO BE SOLVED: To provide a photoreactive polymer and a preparation method of the photoreactive polymer. SOLUTION: A photoreactive polymer exhibits a more rapid photoreaction speed and an excellent aligning property. The present invention also provides a preparation method of the photoreactive polymer, and an alignment layer containing the photoreactive polymer. The photoreactive polymer contains a specific repeating unit including an azo type functional group, in a content of 50 mol% or more of the total polymer. COPYRIGHT: (C)2012,JPO&INPIT

Description

technical field [0001] The present invention relates to a photoreactive polymer exhibiting faster photoresponse speed and excellent alignment, a preparation method thereof, and an alignment layer comprising the photoreactive polymer. Background technique [0002] In recent years, due to the advantages of light weight and low power consumption, liquid crystal displays have been regarded as the most competitive displays that can replace Braun tubes. In particular, the thin film transistor liquid crystal display (TFT-LCD) driven by a thin film transistor, since each pixel is independently driven, the liquid crystal response speed is very fast, and high-definition dynamic images can be realized, and its application range is extended to notebook computers, wall-mounted TV etc. [0003] In these TFT-LCDs, in order to use the liquid crystal as an optical switch, it is necessary to initially align the liquid crystal in a certain direction on the layer formed by the innermost thin f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F132/08C08F232/08C08G61/08C09K19/56G02F1/1337
CPCC08F32/08C08G61/08C08L45/00C09K19/56G02B5/30G02F1/1337
Inventor 崔大胜全成浩元永喆柳东雨
Owner LG CHEM LTD
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