Addition type liquid silicone rubber bonding accelerant and preparation method and application thereof

A technology of adhesion promoter and liquid silicone rubber, which is applied in the field of addition-type liquid silicone rubber adhesion promoter and its preparation, can solve unfavorable processing and molding of addition-type liquid silicone rubber, high viscosity of addition-type liquid silicone rubber, and catalyst poisoning Silicone rubber mechanics and other issues, to achieve the effect of cheap raw materials, improve mechanical properties, and improve bonding performance

Active Publication Date: 2013-10-16
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, there is also the disadvantage that adding this kind will make the addition-type liquid silicone rubber have a high viscosity, which is not conducive to the processing and molding of the addition-type liquid silicone rubber.
[0006] Although there have been reports on adhesion promoters for improving the adhesion of addition-type liquid silicone rubber, most of these studies have a series of problems such as complex synthesis processes, catalyst poisoning, and mechanical decline of silicone rubber, which limits Application of Adhesion Promoter for Addition Liquid Silicone Rubber in Actual Production

Method used

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  • Addition type liquid silicone rubber bonding accelerant and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Synthesis of adhesion promoter

[0026] Mix 7.53g of 1,6-hexanediol diacrylate and 0.02g of isopropanol solution of chloroplatinic acid with a platinum concentration of 2200ppm in a flask, preheat at 60°C for 30min, and set aside.

[0027] Add 20g of hydrogen-containing silicone oil with a mass fraction of 0.5% hydrogen and a viscosity of 600mPa.s, 40g of toluene and 0.1g of p-hydroxyanisole into a four-necked flask with a thermometer and a condensing reflux tube, and heat up while stirring. When the temperature in the four-necked flask reached 60°C, the preheated mixture of 1,6-hexanediol diacrylate and chloroplatinic acid isopropanol solution was added dropwise to the four-necked flask for 1 hour. After the dropwise addition, the reaction temperature was controlled at 80° C. for 2 h. Then add 5g of activated carbon into the four-necked flask, and the adsorption time is 1h. Finally, the reacted solution was subjected to suction filtration and distillation to obtai...

Embodiment 2

[0043] 1. Synthesis of adhesion promoter

[0044] 18.80 g of 1,6-hexanediol diacrylate, 4.16 g of isobornyl acrylate and 0.02 g of platinum(0)-1,3-divinyl-1,1,3,3- The tetramethyldisiloxane complex was mixed in the flask and preheated at 50° C. for 30 minutes, and set aside.

[0045] Add 20g of hydrogen-containing silicone oil with a mass fraction of 1.6% hydrogen and a viscosity of 80mPa.s, 80g of toluene and 0.2g of p-hydroxyanisole into a four-necked flask with a thermometer and a condensing reflux tube, and heat up while stirring. When the temperature in the four-necked flask reached 60°C, the preheated 1,6‐hexanediol diacrylate, isobornyl acrylate and platinum (0)‐1,3‐divinyl‐1,1,3 , The mixture of 3-tetramethyldisiloxane complex was added dropwise to a four-necked flask, and the dropping time was 2h. After the dropwise addition, the reaction temperature was controlled at 80° C. for 3 h. Then add 5g of activated carbon into the four-necked flask, and the adsorption tim...

Embodiment 3

[0052] 1. Synthesis of adhesion promoter

[0053] Mix 7.69g of 1,5-pentanediol diacrylate, 5.14g of glycidyl methacrylate and 0.02g of tetrahydrofuran solution of chloroplatinic acid with a platinum concentration of 2000ppm in a flask, preheat at 50°C for 40min, and set aside .

[0054] Add 20g of hydrogen-containing silicone oil with a mass fraction of 0.68% hydrogen and a viscosity of 50mPa.s, 60g of toluene and 0.10g of p-hydroxyanisole into a four-necked flask with a thermometer and a condensing reflux tube, and heat up while stirring. When the temperature in the four-necked flask reached 60°C, the mixture of preheated 1,5-pentanediol diacrylate, glycidyl methacrylate and chloroplatinic acid tetrahydrofuran solution was added dropwise to the four-necked flask, and Adding time is 2h. After the dropwise addition, the reaction temperature was controlled at 80° C. for 3 h. Then add 5g of activated carbon into the four-necked flask, and the adsorption time is 0.5h. Finally,...

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Abstract

The invention discloses an addition type liquid silicone rubber bonding accelerant and a preparation method and application thereof. The preparation method comprises the steps as follows: mixing an acrylic ester compound and a platinum catalyst solution, and preheating the mixed solution for 20-60 minutes at the temperature of 30-60 DEG C for later use; adding silicon hydrogen bond, hydrogen-containing silicone oil, methylbenzene and para-hydroxybenzaldehyde into a reactor; stirring while heating; when the temperature in the reactor achieves 30-80 DEG C, dripping the mixture of the acrylic ester compound and the platinum catalyst which are primarily heated to 30-60 DEG C into the reactor, for 0.5-3 hours; after dripping, controlling the reaction temperature within 50-90 DEG C and reacting for 0.5-4 hours; adding activated carbon for adsorption, and then performing suction filtering and rotary evaporation to the solution after reaction so as to obtain the bonding accelerant. The bonding accelerant prepared through the method can remarkably improve the adhesive property of the addition type liquid silicon rubber, the preparation process is simple and convenient, the raw materials are cheap and easy to obtain, and the industrialized production is facilitated.

Description

technical field [0001] The invention relates to the technical field of silicone material bonding, in particular to an addition-type liquid silicone rubber adhesion promoter and its preparation method and application, which are used to improve the adhesion performance of the addition-type liquid silicone rubber. Background technique [0002] Addition-type liquid silicone rubber does not produce by-products in the process of cross-linking and vulcanization, the shrinkage rate is extremely small, it can be cured in deep layers, and it does not corrode the materials in contact. In addition, addition-type liquid silicone rubber has excellent moisture resistance, cold resistance, heat resistance, insulation, radiation resistance and weather resistance. Therefore, addition-type liquid silicone rubber has increasingly become a widely used material in the fields of electronics, automobiles, and medical treatment. However, since the addition-type liquid silicone rubber is vulcanized,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08L83/04C08L83/07C08K13/02C08K3/36C08K5/5445C08K5/05C08J5/12
Inventor 王全邹小武苏俊柳周为曾幸荣赖学军李红强汪昱辰
Owner 东莞市贝特利新材料有限公司
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