Liquid crystal sealant composition

A liquid crystal sealant and composition technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of affecting the bonding performance of sealants, affecting the service life of liquid crystals, and difficult to control the particle size of fillers. Approximate thermal shrinkage, uniform size, and good dispersion

Inactive Publication Date: 2017-06-30
镇江爱邦电子科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

In addition, it should have good physical and mechanical properties and heat resistance. In order to meet the above properties, it is necessary to add a large amount of inorganic fillers to the sealant, such as silicon dioxide, aluminum oxide and calcium carbonate. This level can improve the mechanical properties and process characteristics of the sealant, but due to the poor compatibility between the inorganic filler and the epoxy resin, it is not easy to disperse in the system, and there will be agglomeration in the cured system, which will cause stress concentration and affect the sealant. The bonding performance of the substrate, on the other hand, affected by moisture, the agglomerated particles dissolve in the liquid crystal, causing pollution to the liquid crystal cell and affecting the service life of the liquid crystal
In order to solve the above problems, the inorganic filler is modified with a silane coupling agent, but the particle size of the modified filler is not easy to control, which affects the thickness of the liquid crystal cell

Method used

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  • Liquid crystal sealant composition
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Examples

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preparation example Construction

[0046] Preparation of monodisperse polymer microspheres with a particle size of 1 μm: 100 g of styrene (Shanghai Chemical Reagent Company of China Pharmaceutical Group), 3 g of azobisisobutyronitrile (Shanghai Chemical Reagent Company of China Pharmaceutical Group), 20 g of polyvinylpyrrolidone (China Pharm Group Shanghai Chemical Reagent Company), absolute ethanol, etc. were added into a 500ml three-neck flask, stirred until homogeneous, nitrogen gas was introduced to exhaust oxygen for 10 minutes, the water bath was heated to 70°C, the rotation speed of the stirring paddle was kept at 60rpm, and the reaction was carried out for 24 hours. Use a high-speed centrifuge at 5000 rpm for 20 minutes to centrifuge, and wash the microspheres in the lower layer with a mixture of ethanol and water for several times. Seed particles with a particle size of about 1 μm can be obtained.

[0047] Preparation of monodisperse polymer microspheres with a particle size of 2 μm: disperse 50 g of 1...

Embodiment 1

[0052] raw material:

[0053]

[0054] Stir the above-mentioned epoxy resin silane coupling agent and diluent, then add fillers and modified dicyandiamide, stir and disperse, and then grind 3 times on a three-roll mill (Shanghai Shihe Electromechanical Equipment Co., Ltd.) to obtain a liquid crystal sealant combination Object 1.

Embodiment 2

[0056] raw material:

[0057]

[0058] Stir the above-mentioned epoxy resin silane coupling agent and diluent, then add fillers and modified dicyandiamide, stir and disperse, and then grind 3 times on a three-roll mill (Shanghai Shihe Electromechanical Equipment Co., Ltd.) to obtain a liquid crystal sealant combination Object 2.

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Abstract

The invention discloses a liquid crystal sealant composition. The liquid crystal sealant composition comprises epoxy resin, curing agent, filler and silane coupling agent. The curing agent refers to modified dicyandiamide. Compared with the existing liquid crystal sealant composition at a temperature of over 170 DEG C, the liquid crystal sealant composition can be solidified at a temperature of </= 150 DEG C. The filler refers to high crosslink polymeric microsphere. Compared with the inorganic filler, the filler is compatible to the epoxy resin and is easy to disperse; the grain size is uniform so that uneven thickness of liquid crystal boxes affecting service life of the liquid crystal box is avoided. Otherwise, the liquid crystal sealant composition is used for sealing a liquid crystal display device. After the liquid crystal sealant composition is solidified, the seal part of a solidified has no bubbles or no bad phenomenon of uneven lines. The solidified liquid crystal display device has excellent bonding strength, water-tolerant reliability and flexibility.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a liquid crystal sealant composition. Background technique [0002] Liquid crystal sealant is mainly used in the process of manufacturing liquid crystal display elements by liquid crystal filling method to bond the upper and lower sheets of glass with electrodes and alignment layers, which has less pollution to liquid crystal, good bonding with glass, and no cell gap Uneven curable resin composition. [0003] There are two main types of liquid crystal sealants: thermosetting and UV curing. Heat-curing sealant is mainly composed of epoxy resin, curing agent, filler and other components, most of which are single-component, and the curing agent selected is latent curing agent such as acid anhydrides, hydrazides and dicyandiamide. Compared with the first two types of curing agents, dicyandiamide is cheap and easy to produce, which can greatly reduce the cost. However, when dicyand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/08C09J11/06C08G59/50C08F212/36C08F212/08G02F1/1341
CPCC08F212/36C08G59/504C09J11/06C09J11/08C09J163/00G02F1/1341C08L25/08C08K5/5435C08F212/08
Inventor 周际东朱冬玲赵玉媛
Owner 镇江爱邦电子科技有限公司
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