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High-hardness air-pressure-resistant silicone rubber, preparation method and use method thereof

A high-hardness, silicone rubber technology, applied in the field of silicone rubber, can solve the problems of no practical value, poor air pressure resistance, low strength of silicone rubber, etc., and achieve the effect of improving hardness, good hardness and air pressure resistance, and improving mechanical strength.

Pending Publication Date: 2020-12-11
东莞市朗晟材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, silicone rubber raw materials are widely used in various industries due to their superior performance, but ordinary silicone rubber raw materials are mainly composed of silicone chain links containing methyl groups and a small amount of vinyl groups, which have good oil resistance and elasticity. And tear strength, when it is applied to industry, its performance is often unsatisfactory. Unreinforced silicone rubber has extremely low strength and poor air pressure resistance, so it has no practical value, so it is used in some applications that require high hardness and air pressure resistance. Field applications are limited, so we invented a high-hardness air-resistant silicone rubber

Method used

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  • High-hardness air-pressure-resistant silicone rubber, preparation method and use method thereof
  • High-hardness air-pressure-resistant silicone rubber, preparation method and use method thereof
  • High-hardness air-pressure-resistant silicone rubber, preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-hardness air pressure-resistant silicone rubber, comprising the following raw materials in parts by weight:

[0040]

[0041] Each part of the methyl vinyl silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 3.0:4.5:0.8. The vinyl content of methyl vinyl silicone rubber A is 0.06%, and the molecular weight is 60,000; the vinyl content of the methyl vinyl silicone rubber B is 0.21%, and the molecular weight is 650,000; the methyl vinyl silicone rubber C has a vinyl content of 4.8% and a molecular weight of 500,000.

[0042] Each part of the modified fumed silica includes the raw materials of the following parts by weight:

[0043] Dimethyldiethoxysilane 1 part

[0044] Fumed silica 58 parts

[0045] 0.4 parts of deionized water;

[0046] Each part of the fumed silica is 380 fumed silica.

[0047] Described modified fumed silica is obtained by the following me...

Embodiment 2

[0061] A high-hardness air pressure-resistant silicone rubber, comprising the following raw materials in parts by weight:

[0062]

[0063]

[0064] Each part of the methyl vinyl silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 3.3:4.9:0.9. The vinyl content of the methyl vinyl silicone rubber A is 0.07%, and the molecular weight is 680,000; the vinyl content of the methyl vinyl silicone rubber B is 0.215%, and the molecular weight is 680,000; the methyl vinyl silicone rubber C has a vinyl content of 4.9% and a molecular weight of 530,000.

[0065] Each part of the modified fumed silica includes the raw materials of the following parts by weight:

[0066] Dimethyldiethoxysilane 2 parts

[0067] Fumed silica 59 parts

[0068] 0.5 parts of deionized water;

[0069] Each part of the fumed silica is 300 fumed silica.

[0070] Described modified fumed silica is obtained ...

Embodiment 3

[0084] A high-hardness air pressure-resistant silicone rubber, comprising the following raw materials in parts by weight:

[0085]

[0086] Each part of the methyl vinyl silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 3.7:5.3:1.0, the said The vinyl content of methyl vinyl silicone rubber A is 0.08%, and the molecular weight is 700,000; the vinyl content of the methyl vinyl silicone rubber B is 0.22%, and the molecular weight is 700,000; the methyl vinyl silicone rubber C has a vinyl content of 5.0% and a molecular weight of 550,000.

[0087] Each part of the modified fumed silica includes the raw materials of the following parts by weight:

[0088] Dimethyldiethoxysilane 3 parts

[0089] Fumed silica 61 parts

[0090] 0.6 parts of deionized water;

[0091] The fumed silica per part is 3200 fumed silica.

[0092] Described modified fumed silica is obtained by the foll...

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Abstract

The invention relates to the technical field of silicone rubber, particularly to high-hardness air-pressure-resistant silicone rubber, a preparation method and a use method thereof. The high-hardnessair-pressure-resistant silicone rubber is prepared from the following raw materials in parts by weight: 4-8 parts of hydroxyl-terminated polydimethylsiloxane, 100-115 parts of methyl vinyl silicone rubber, 60-70 parts of modified fumed silica, 1-3 parts of vinyl hydroxyl silicone oil, 0.4-0.8 part of a silane coupling agent, 0.06-0.18 part of a release agent and 0-1.5 parts of a hardening agent. According to the invention, the high-hardness air-pressure-resistant silicone rubber disclosed by the invention has very good hardness and air pressure resistance, has relatively good comprehensive properties such as viscosity, tensile strength and shrinkage rate, and can well meet the requirements of special industrial production on hardness; and the preparation method is simple, convenient to operate and control and high in production efficiency, large-scale industrial production can be achieved, the using method of the high-hardness air-pressure-resistant silicone rubber is convenient to operate and control and stable in quality, and the prepared silicone rubber product is stable in performance.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a high-hardness air pressure-resistant silicone rubber, a preparation method and a use method thereof. Background technique [0002] In the prior art, silicone rubber raw materials are widely used in various industries due to their superior performance, but ordinary silicone rubber raw materials are mainly composed of silicone chain links containing methyl groups and a small amount of vinyl groups, which have good oil resistance and elasticity. And tear strength, when it is applied to industry, its performance is often unsatisfactory. Unreinforced silicone rubber has extremely low strength and poor air pressure resistance, so it has no practical value, so it is used in some applications that require high hardness and air pressure resistance. Field applications are limited, so we invented a high-hardness air-resistant silicone rubber. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/05C08L27/18C08K13/06C08K9/06C08K7/26C08K3/36C08K3/22C08K5/09C08K5/098C08K5/14
CPCC08L83/04C08L2205/025C08L2205/035C08K2201/014C08K2003/2227C08L2201/02
Inventor 潘鹤斌谭政新郭韵恬
Owner 东莞市朗晟材料科技有限公司
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