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Silicone rubber and preparation method thereof

A silicone rubber and rubber technology, applied in the field of silicone rubber and its preparation, can solve the problems of large compression set and low rebound rate.

Active Publication Date: 2014-06-04
MIDGOLD FINE PERFORMANCE MATERIALS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of science and technology, higher requirements are put forward for the compression deformation and resilience performance of silicone rubber. In the prior art, silicone rubber generally has a large compression set, a low rebound rate, or both. It can no longer meet the special requirements of some products on the market, such as some high-end automobile shaft seal rings, gaskets, sealing miscellaneous parts, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] In another aspect of the present invention, the present invention provides a method for preparing silicone rubber. According to an embodiment of the present invention, the method includes: mixing methyl vinyl silicone rubber, calcium stearate, silica, and dimethyl Base diethoxysilane, calcium carbonate, cerium oxide, iron isooctanoate organic solution, vinyl MQ silicone resin and quartz powder are mixed to obtain a silicone rubber compound; the silicone rubber compound is mixed with 2,5-dimethyl -2,5-bis(tert-butylperoxy)hexane is mixed to obtain silicone rubber, among them, methyl vinyl silicone rubber, calcium stearate, white carbon black, dimethyldiethoxy silane , Calcium carbonate, cerium oxide, iron isooctanoate organic solution, vinyl MQ silicone resin, quartz powder and 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane. The dosage is: 100 Parts by weight of methyl vinyl silicone rubber; 30-40 parts by weight of white carbon black; 3-6 parts by weight of dimethyldiethox...

Embodiment 1

[0033] Ingredients formula:

[0034] 1000g of methyl vinyl silicone rubber, 350g of white carbon black, 50g of dimethyldiethoxysilane, 1.4g of calcium stearate, 250g of quartz powder, 80g of calcium carbonate, 20g of cerium oxide, 1.0 g parts by weight of iron isooctanoate organic solution, 20 g of vinyl MQ silicone resin, 15 g of 2,5-dimethyl-2,5-bis(tert-butylperoxy).

[0035] Preparation:

[0036] Knead the methyl vinyl silicone rubber raw rubber and calcium stearate in a kneader for 3 to 5 minutes, then add the white carbon black and dimethyl diethoxy silane to the kneader 4 times, after each addition Stir for 30 minutes; after the white carbon black and diethoxysilane are mixed with the resulting mixture for molding, the resulting molding mixture is heated to 150-160 degrees Celsius, vacuumed, and kept for 2 to 3 hours; the temperature of the resulting heated material is reduced To 80 degrees Celsius, add calcium carbonate, cerium oxide, iron isooctanoate organic solution and ...

Embodiment 2

[0038] Ingredients formula:

[0039] 1000g of methyl vinyl silicone rubber, 350g of white carbon black, 50g of dimethyldiethoxysilane, 1.4g of calcium stearate, 250g of quartz powder, 80g of calcium carbonate, 20g of cerium oxide, 3.0 g parts by weight of iron isooctanoate organic solution, 20 g of vinyl MQ silicone resin, 15 g of 2,5-dimethyl-2,5-bis(tert-butylperoxy).

[0040] Preparation method: the same as in Example 1.

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PUM

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Abstract

The invention discloses a silicone rubber and a preparation method thereof. The silicone rubber contains, by weight, 100 parts of methyl vinyl silicone rubber, 30 to 40 parts of white carbon black, 3 to 6 parts of dimethyldiethoxylsilane, 0.10 to 0.15 part of calcium stearate, 20 to 30 parts of quartz powder, 6 to 10 parts of calcium carbonate, 1 to 3 parts of cerium oxide, 0.1 to 0.7 part of an iron isocaprylate organic solution, 2 to 5 parts of vinyl MQ silicone resin and 1.5 parts of 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane. According to embodiments in the invention, the silicone rubber has high resilience and low compression set performance at the same time.

Description

Technical field [0001] The present invention relates to the field of organic synthesis. Specifically, the present invention relates to a silicone rubber and a preparation method thereof. Background technique [0002] Due to the excellent comprehensive properties of high-temperature vulcanized silicone rubber products, they have been widely used in aviation, electronics, electrical, chemical, instrumentation, automotive and other industries, as well as in various fields of medical and health, and daily life. With the development of science and technology, higher requirements have been placed on the compressive deformation and resilience of silicone rubber. In the prior art, silicone rubber generally has larger compression set, lower rebound rate, or both. It has been unable to meet the special requirements of certain products on the market, such as some high-end automotive shaft seal rings, gaskets, and miscellaneous sealing parts. Therefore, reducing the compression set of silic...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/02C08K3/36C08K5/5419C08K5/098C08K3/26C08K3/22C08K5/14B29C35/02
Inventor 曾稳滔宋斌赵祺
Owner MIDGOLD FINE PERFORMANCE MATERIALS SHENZHEN
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