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Preparation method of acidic silicone sealant and sealant

A technology of sealant and acid silicon, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of insufficient reaction, slow production speed, and insufficient stirring, etc., to achieve thorough reaction and high production speed Fast, well-stirred effect

Active Publication Date: 2020-08-14
南通亿硕新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing preparation method of acidic silicone sealant does not fully stir the raw materials, the reaction is not thorough enough, and the production speed is slow. Therefore, in view of the above status quo, it is urgent to develop an acidic silicone with sufficient stirring, thorough reaction and fast production speed. The preparation method of sealant, to overcome the deficiencies in the current practical application, to meet the current demand

Method used

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  • Preparation method of acidic silicone sealant and sealant
  • Preparation method of acidic silicone sealant and sealant
  • Preparation method of acidic silicone sealant and sealant

Examples

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Effect test

Embodiment 1

[0024] A preparation method and sealant of acidic silicone sealant, comprising the following steps:

[0025] Step 1. Mixing treatment of raw materials: Add hydroxyl-terminated polydimethylsiloxane, ethyltriacetoxysilane and silicon dioxide into the mixer for stirring. After the stirring is completed, add tin acetate catalyst into the mixer , and evacuate the mixer to a vacuum to obtain a crude acidic silicone sealant;

[0026] Step 2, dehydration treatment: add the crude acidic silicone sealant to the dehydration device for dehydration;

[0027] Step 3. Refining treatment: add the dehydrated crude acidic silicone sealant into a strong disperser for stirring and homogenizing to prepare the acidic silicone sealant;

[0028] Step 4. Filling production: add the acidic silicone sealant into the filling machine to obtain an industrial product.

Embodiment 2

[0030] In the embodiment of the present invention, the ratio of hydroxyl-terminated polydimethylsiloxane, ethyltriacetoxysilane and silicon dioxide in the first step is 3:2:3.

Embodiment 3

[0032] In the embodiment of the present invention, in the first step, the hydroxyl-terminated polydimethylsiloxane, ethyltriacetoxysilane and silicon dioxide are stirred in the mixer for 20-30 minutes.

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Abstract

The invention discloses a preparation method of an acidic silicone sealant and the sealant. The preparation method comprises the following steps: mixing raw materials, namely adding hydroxyl-terminated polydimethylsiloxane, ethyltriacetoxysilane and silicon dioxide into a stirrer for stirring, adding a tin acetate catalyst into the stirrer after stirring is finished, and vacuumizing the stirrer toobtain a crude acidic silicone sealant; performing dehydration treatment, namely adding the crude acidic silicone sealant into a dehydration device for dehydration; performing refining treatment, namely adding the dehydrated crude acidic silicone sealant into a powerful dispersion machine, and stirring and homogenizing to obtain the acidic silicone sealant; and performing filling production, namely adding the acidic silicone sealant into a filling machine to prepare an industrial product. The method is sufficient in stirring, thorough in reaction and high in production speed.

Description

technical field [0001] The invention relates to the technical field of silicone sealant preparation, in particular to a preparation method of acidic silicone sealant and the sealant. Background technique [0002] Acidic silicone sealant vulcanizes quickly at room temperature, has thixotropy, does not flow, has good aging resistance, oil resistance, water resistance, dilute acid resistance, dilute alkali resistance, high and low temperature resistance, and can be used in the range of -60-250 °C. Good sealing, shock resistance and impact resistance. Acidic silicone sealant can replace rubber pads, asbestos pads, cork and paper pads, and is used for sealing flat flanges and cover joint surfaces of mechanical and electrical equipment such as automobiles, motorcycles, pipes, and various water pumps. [0003] The existing method for preparing acidic silicone sealants does not sufficiently stir the raw materials, the reaction is not thorough enough, and the production speed is slo...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08K5/5419C08K3/36
Inventor 周小兵
Owner 南通亿硕新材料科技有限公司
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