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Vapor resistant silicone rubber and preparation method thereof

A water vapor, silicone rubber-resistant technology, applied in the field of silicone rubber, can solve problems such as the deterioration of silicone performance, and achieve the effect of a simple preparation method

Inactive Publication Date: 2014-12-10
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the action of high-pressure steam with a temperature exceeding 150°C, the main chain of silicone rubber degrades quickly, and the performance of silicone rubber deteriorates.

Method used

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  • Vapor resistant silicone rubber and preparation method thereof
  • Vapor resistant silicone rubber and preparation method thereof
  • Vapor resistant silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of above-mentioned water vapor resistant silicone rubber, comprises the steps:

[0019] Step 1, adding 100 parts by mass of raw rubber with a vinyl molar content of 0.12% and 3 to 6 parts by mass of raw rubber with a vinyl molar content of 8.0% into a kneader and stirring for 0.2 to 0.4 minutes;

[0020] Step 2, adding 30-50 parts by mass of hydrophilic fumed silica and 0.2-0.4 parts by mass of stearic acid in 3-6 times, stirring thoroughly after each addition, to obtain a silicone rubber mix;

[0021] Step 3, cooling to room temperature after the glue is released, to obtain the water vapor resistant silicone rubber.

[0022] The steam-resistant silicone rubber prepared by the present invention can be added with a vulcanizing agent during use, and vulcanized at 175° C. for 5 minutes.

[0023] The raw rubber with a vinyl molar content of 0.12% involved in the examples was purchased from Jiangsu Tianchen Silicon Material Co., Ltd., model DV0.12; th...

Embodiment 1

[0025] 1. Add 100 parts by mass of raw rubber with a vinyl molar content of 0.12% and 3 parts by mass of raw rubber with a vinyl molar content of 8.0% into a kneader and stir for 0.3 minutes;

[0026] 2. Add 50 parts by mass of hydrophilic fumed silica and 0.2 parts by mass of stearic acid in 4 times, and stir thoroughly after each addition to obtain a silicone rubber compound;

[0027] 3. Cool to room temperature after the glue is released to obtain the water vapor resistant silicone rubber.

[0028] Add the vulcanizing agent to the water vapor resistant silicone rubber prepared in this example, vulcanize at 175°C for 5 minutes, and conduct a performance test. The results are shown in the following table:

[0029]

[0030]

[0031] Then, after steam treatment at 175°C for 2 hours, the performance test was carried out. The results are shown in the following table:

[0032]

Embodiment 2

[0034] 1. Add 100 parts by mass of raw rubber with a vinyl molar content of 0.12% and 6 parts by mass of raw rubber with a vinyl molar content of 8.0% into a kneader and stir for 0.4 min;

[0035] 2. Add 50 parts by mass of hydrophilic fumed silica and 0.4 parts by mass of stearic acid in 6 times, and stir thoroughly after each addition to obtain a silicone rubber compound;

[0036] 3. Cool to room temperature after the glue is released to obtain the water vapor resistant silicone rubber.

[0037] Add the vulcanizing agent to the water vapor resistant silicone rubber prepared in this example, vulcanize at 175°C for 5 minutes, and conduct a performance test. The results are shown in the following table:

[0038]

[0039] Then, after steam treatment at 175°C for 2 hours, the performance test was carried out. The results are shown in the following table:

[0040]

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Abstract

The invention discloses vapor resistant silicone rubber, comprising the following components in parts by mass: 100 parts of crude rubber of which the vinyl molar content is 0.12%, 3-6 parts of crude rubber of which the vinyl molar content is 8.0%, 30-50 parts of hydrophilic gas phase silica and 0.2-0.4 part of stearic acid. The invention also discloses a preparation method of the vapor resistant silicone rubber. The method comprises the following steps: adding the crude rubber of which the vinyl molar content is 0.12% and the crude rubber of which the vinyl molar content is 8.0% to a kneading machine to stir for 0.2-0.4 minute; adding the hydrophilic gas phase silica and the stearic acid for a plurality of times, fully stirring after adding every time, so as to obtain a silicone rubber compound; and after discharging the rubber, cooling to room temperature, so as to obtain the vapor resistant silicone rubber. The silicon rubber prepared by the method simultaneously has the characteristics of vapor resistance, relatively good mechanical property and good processability by practical detection. The preparation method disclosed by the invention is simple, feasible and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a water vapor-resistant silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber has many excellent properties such as good high and low temperature resistance, ozone resistance, weather resistance, insulation and production inertia, and is widely used in various fields of the national economy. However, under the action of high-pressure steam with a temperature exceeding 150°C, the main chain of silicone rubber degrades quickly, and the performance of silicone rubber deteriorates. Therefore, the study of water vapor resistant silicone rubber has a very positive significance. Contents of the invention [0003] The object of the present invention is to provide a water vapor resistant silicone rubber, which is resistant to water vapor and has better mechanical properties and processing properties. The invention also provides a prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K3/36C08K5/09
Inventor 施贤斌蒯红星徐文俊耿政
Owner JIANGSU TIANCHEN NEW MATERIALS
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