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Method for producing liquid crystal polymer multilayer structure

A technology of liquid crystal polymers and manufacturing methods, applied in the direction of lamination, devices for coating liquid on surfaces, lamination devices, etc., can solve the problems that transparent films of liquid crystal polymers cannot be obtained, etc.

Inactive Publication Date: 2010-07-28
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the generation of multiple domains with different alignment directions, there was a problem that transparent films of liquid crystal polymers could not be obtained

Method used

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  • Method for producing liquid crystal polymer multilayer structure
  • Method for producing liquid crystal polymer multilayer structure
  • Method for producing liquid crystal polymer multilayer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0173] The present invention will be described below based on Examples (Examples 1-7, 9, 10, 12, 18-21) and Comparative Examples (Examples 8, 11, 13-17), but the present invention is not limited thereto.

[0174] (molecular weight)

[0175] The polystyrene-equivalent number average molecular weight was calculated|required using GPC (manufactured by TOSOH CORPORATION, brand name: HLC-8220).

[0176] (Measurement of melting point, glass transition point, phase transition temperature)

[0177] Using DSC (manufactured by Bruker AXS K.K., trade name: DSC3100S), the peak temperature was identified, and the temperature increase rate was set at 10°C / min. In addition, identification of liquid crystal phases and crystals was performed by observation using a polarizing microscope (manufactured by Olympus Corporation, trade name: BX-51).

[0178] (in-plane unevenness)

[0179] Two polarizing plates were formed into a state of crossed nicols, and in-plane unevenness of the sample was ob...

Synthetic example 1

[0187] [Synthesis Example 1] Synthesis of Monomer (3-1) Used in Examples

[0188] Monomer (3-1) was synthesized by the following synthetic route. The specific details are described below.

[0189] [chemical formula 2]

[0190]

[0191] Synthesis of compound (13):

[0192] Magnesium (6.45g) was added in a 1L four-necked flask equipped with a reflux device and a dropping device, and 4-propylbromobenzene (compound (11)) dissolved in dehydrated tetrahydrofuran (200mL) was added dropwise for 60 minutes under nitrogen flow. , 50g) solution. After the dropwise addition, 100 mL of dehydrated tetrahydrofuran was further added dropwise and stirred for 2 hours to prepare a Grignard reagent. Next, the four-neck flask was cooled to 0°C, and 1,1'-bicyclohexane-1,4-dione monoethylene glycol ketal dissolved in dehydrated tetrahydrofuran (200 mL) was added dropwise over 60 minutes under a nitrogen stream. (compound (12), 35.1 g) solution. After completion of the dropwise addition, the...

Synthetic example 2

[0212] [Synthesis Example 2] Synthesis of Monomer (3-3) Used in Examples

[0213] Monomer (3-3) was synthesized according to the synthetic route shown below. The details are described below.

[0214] [chemical formula 3]

[0215]

[0216] Synthesis of compound (32):

[0217] Compound (31) (50.0 g) and 3,4-dihydropyran (7.0 mL) were added in a 5 L four-necked flask equipped with a reflux device and a stirrer, and dichloromethane (3500 mL) was dissolved in p-toluenesulfonic acid ( 0.54 g) was reacted at room temperature to obtain 20.68 g of compound (32).

[0218] Synthesis of compound (29):

[0219]Compound (32) (24.87 g), diethyl ether (500 mL), and triethylamine (14 mL) were added to a 1 L four-necked flask equipped with a reflux device and a stirrer. After cooling to 0°C, 1,1,2,2,3,3,4,4,4-nonafluorobutanesulfonyl fluoride (12.31 mL) was added, the temperature was slowly raised to room temperature, and the mixture was stirred for 40 hours. Water (300 mL) was added, ...

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Abstract

Disclosed is a method for efficiently producing a liquid crystal polymer multilayer structure which contains uniformly aligned liquid crystal polymers, while having excellent transparency. This method enables the liquid crystal polymer multilayer structure to have a larger area. Specifically disclosed is a method for producing a liquid crystal polymer multilayer structure which has a substrate, a layer containing a liquid crystal polymer and a layer containing a non-liquid-crystal coating polymer. This method for producing a liquid crystal polymer multilayer structure is characterized by comprising a step for forming the layer containing a liquid crystal polymer on the substrate surface, a step for forming the layer containing a non-liquid-crystal coating polymer on the layer containing a liquid crystal polymer, and a step for performing a heat treatment at a temperature not less than the glass transition temperature or the melting point of the coating polymer and not more than the clear point of the liquid crystal polymer. The layer containing a non-liquid-crystal coating polymer is preferably formed by applying a liquid containing a coating polymer and a solvent which does not substantially dissolve the liquid crystal polymer, and then removing the solvent.

Description

technical field [0001] The present invention relates to a method for producing a liquid crystal polymer laminate. Background technique [0002] The requirements for large area and thinning of optical films are put forward. [0003] As a method for producing an optically anisotropic film comprising a liquid crystal substance as a constituent material, there is known a method in which a polymerizable liquid crystal composition is coated on a substrate and then polymerized. This production method discloses a method in which a surfactant or a leveling agent is added to a polymerizable liquid crystal composition in order to eliminate uneven film thickness and uneven orientation that occur when the polymerizable liquid crystal composition is coated ( Refer to Patent Documents 1 and 2). [0004] However, current surfactants and leveling agents have low compatibility with liquid crystal compositions and sometimes cause alignment disorder. In addition, when the polymerizable liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/06B05D3/02B05D7/24B32B27/30B32B37/06C08J7/04G02B5/30C08J7/043
CPCC08J7/042C08J7/08B32B2038/168B32B37/24B32B2315/08B32B2309/68B05D7/54B32B2305/55B32B2309/04B05D3/0254B32B2457/202G02B5/3016B32B2309/02Y10T428/31504C08J7/043
Inventor 山本祐治海田由里子中野贵志森泽义富
Owner ASAHI GLASS CO LTD
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