Modified 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 affecting the screen printability of liquid crystal sealants, the performance decline of liquid crystal sealants, and the difficulty in controlling the particle size of fillers, etc. problems, to achieve the effect of improving printing gloss, printing continuity and low density

Inactive Publication Date: 2017-09-22
镇江爱邦电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of inorganic fillers can improve the mechanical properties and process characteristics of the sealant to a certain extent, but the surface of most spherical inorganic fillers is hydrophilic and polar, and is easy to absorb water, while epoxy resin is hydrophobic, so The compatibility between the two is poor, and it is difficult to form a good bond at the interface. Direct or large filling often easily leads to some performance degradation of the liquid crystal sealant; at the same time, the addition of amorphous inorganic fillers will deteriorate the fluidity of the sealant. Seriously affect the screen printability of liquid crystal sealant
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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  • Modified liquid crystal sealant composition
  • Modified liquid crystal sealant composition
  • Modified liquid crystal sealant composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Preparation of seed microspheres with a particle size of 1 μm: Add 20 g of styrene, 0.2 g of azobisisobutyronitrile, 1 g of polyvinylpyrrolidone, 300 g of absolute ethanol, etc. into a 500 mL three-necked flask, stir until homogeneous, and ventilate with nitrogen gas. Oxygen for 10 minutes, the water bath was heated to 70°C, the rotation speed of the stirring paddle was kept at 60 rpm, and the reaction was carried out for 24 hours. The sample was separated by a high-speed centrifuge, and the lower microspheres were washed with a mixture of ethanol and water for several times. Seed particles with a particle size of about 1 μm can be obtained.

[0029] Preparation of dimple-shaped monodisperse polymer microspheres with a particle size of 2 μm: 50 g of 1 μm seed microspheres, 400 g of monomer (trihydroxypropane trimethacrylate), and 6 L of sodium dodecylbenzenesulfonate aqueous solution The emulsion was added into a three-necked bottle, and stirred and swelled at a constan...

Embodiment 1

[0032] This example is used to illustrate the liquid crystal sealant composition and its preparation method provided by the present invention.

[0033] raw material:

[0034]

[0035]

[0036] 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

[0038] This example is used to illustrate the liquid crystal sealant composition and its preparation method provided by the present invention.

[0039] raw material:

[0040]

[0041] 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 modified liquid crystal sealant composition, which includes an epoxy resin, a curing agent, a filling material and a silicane coupling agent, wherein the curing agent is a modified dicyandiamide compound having a general formula 1 shown in the description. In the formula 1, R is halogen, phenoxyl and alkoxy having 1-6 carbon atoms. A wowotou-shaped mono-dispersed polymer is adopted as a filling material, has features of low density and high specific surface area, and is high in bulkiness and good in elasticity, so that printing gloss of a liquid crystal sealant is improved. The polymer has a hollow portion which can hold a great deal of guest molecules to generate a microscopic ' 'coating ' ' effect, so that the phenomenon of sinking of the filling material is prevented. The printing persistence of the liquid crystal sealant composition is greatly improved. Since the polymer has a special hollow structure, the polymer has a refractive index large enough in the air, so that the liquid crystal sealant is excellent in covering power.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an organic filler, its preparation method and its application in liquid crystal sealing agent. 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] The liquid crystal sealant should have good screen printability, suitable initial adhesion, high surface tension, good thixotropy, suitable rheology, and no pollution to the liquid crystal cell. In order to meet the above properties, it is necessary to add a large amount of amorphous or spherical inorganic fillers, such as silica, alumina, calcium carbonate, etc., to the liquid crystal sealant. The additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/08C09J11/06C08G59/50C08F257/02C08F222/14
Inventor 赵玉媛朱冬玲周际东
Owner 镇江爱邦电子科技有限公司
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