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High and low temperature-resistant rubber with high damping

A technology of high and low temperature resistance and silicone rubber, which is applied in the field of damping and vibration-absorbing materials and high-damping heat-vulcanized silicone rubber compounds. It can solve the problems of large compression set and limited application range, and achieve low compression set and high mechanical strength. The effect of a wide range of strength and temperature resistance

Inactive Publication Date: 2006-03-15
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its crosslinking density, its tensile strength is less than 1.5MPa, and there may also be a problem of excessive compression set
In this way, its application range will be limited, especially not suitable for shock absorbers and shock absorbers with a certain load.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of high and low temperature resistance high damping silicone rubber, it is characterized in that it is made of the raw material of following weight ratio: methyl phenyl vinyl polysiloxane (wherein phenyl content 7.24%, vinyl content 0.19% molecular weight 480,000 ) 100 parts by weight, 40 parts by weight of white carbon black (surface hydrophobic treatment with silazane, the same below), 4 parts by weight of diphenyldihydroxysilane, kneaded uniformly by a kneader to obtain a rubber compound. Every 100 parts by weight of this rubber compound is added 0.5 parts by weight of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, fully mixed to uniform on the open mill, after the above-mentioned Fix the vulcanization conditions and vulcanize to prepare test specimens. Test its tensile strength, elongation at break, tear strength, Shore A hardness, compression set, damping loss factor tanδ in each temperature range, etc., see Table 1.

[0027] The preparation method of the meth...

Embodiment 2

[0029] A kind of high and low temperature resistance high damping silicone rubber, it is characterized in that it is by the raw material of following weight ratio: the methyl phenyl vinyl polysiloxane (wherein phenyl content 7.24 %, vinyl content 0.19%, molecular weight 480,000) 100 parts by weight, 45 parts by weight of white carbon black, 9 parts by weight of diphenyl dihydroxysilane, kneaded uniformly by kneader to obtain rubber compound. Every 100 parts by weight of this rubber compound is added 0.5 parts by weight of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, fully mixed to uniform on the open mill, after the above-mentioned Fix the vulcanization conditions and vulcanize to prepare test specimens. Test its tensile strength, elongation at break, tear strength, Shore A hardness, compression set, damping loss factor tanδ in each temperature range, etc., see Table 1.

Embodiment 3

[0031]A kind of high and low temperature resistance high damping silicone rubber, it is characterized in that it is by the raw material of following weight ratio: the methyl phenyl vinyl polysiloxane (wherein phenyl content 7.24 %, vinyl content 0.19%, molecular weight 480,000) 100 parts by weight, 50 parts by weight of white carbon black, 5 parts by weight of diphenyl dihydroxysilane, kneaded uniformly by kneader to obtain rubber compound. Every 100 parts by weight of this rubber compound is added 0.5 parts by weight of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, fully mixed to uniform on the open mill, after the above-mentioned Fix the vulcanization conditions and vulcanize to prepare test specimens. Test its tensile strength, elongation at break, tear strength, Shore A hardness, compression set, damping loss factor tanδ in each temperature range, etc., see Table 1.

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PUM

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Abstract

A high and low temperature resistant damping silicon rubber consists of organic polysiloxane 55-70%, hydrophobic carbon white 25-38%, polysiloxane or silane 0-7.6%, peroxide cross-linking initiating agent 0.4-3.0% or / and ferric oxide<=4%. The chain general formula of organic polysiloxane is R1xR2ySiO(4-x-y) / 2, among them x+y is positive integral of 1-3, R1 is monoacidic alkyl, R2 is monoacidic unsaturated group such as phenyl, vinyl and allyl etc., content of phenyl is 5-15mol%, content of vinyl is 0.05-0.23mol% and molecular weight of polymer is 45-60 ten thousand. The process is carried out by mediating, mixing and vulcanizing. It has better damping characteristic, less compression deformation and higher mechanical strength. It can be used for aircraft damping absorber.

Description

Technical field: [0001] The invention relates to a high-low-temperature-resistant high-damping silicone rubber. Specifically, the invention relates to a high-damping heat-vulcanized silicone rubber compound with high energy-absorbing, vibration-reducing, and noise-reducing functions. The silicone rubber is especially suitable for use as Damping vibration-absorbing materials on aerospace devices. Background technique: [0002] Ordinary silicone rubber generally has excellent high and low temperature resistance, and can adapt to applications in some special environments, such as aerospace vehicles, etc., but its vibration and noise reduction performance is poor. The organic polymers usually used as damping and vibration-reducing materials are mostly polyurethane or polyolefin-based resins, etc. Although they have excellent damping and vibration-reducing properties in a specific temperature range, their significant disadvantage is that the temperature range is narrow. Its damp...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K3/22
Inventor 周远建罗廷纲唐小斗
Owner CHINA BLUESTAR CHENGRAND CO LTD
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