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Sound absorption and noise reduction type composite rubber and preparation method thereof

A compound rubber, noise reduction technology, applied in the rubber field, can solve the problems of inability to absorb sound waves, reduce noise, and the sound absorption performance of EPDM rubber is not very high.

Inactive Publication Date: 2021-10-01
深圳市奥科杰环保材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes. It is widely used in automotive parts, waterproof materials for construction, wire and cable sheaths, heat-resistant hoses, tapes, automotive seals, etc. Such as high and low temperature resistance, ozone resistance, weather resistance and electrical insulation, etc., but the sound absorption performance of EPDM rubber is not very high, and it cannot absorb sound waves and reduce noise

Method used

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  • Sound absorption and noise reduction type composite rubber and preparation method thereof

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preparation example Construction

[0026] The preparation method of described mesoporous silica, comprises the following steps:

[0027] (1) Add cetyltrimethylammonium bromide into deionized water, and stir at 200-400r / min at room temperature for 2-4min to obtain cetyltrimethylammonium bromide aqueous solution;

[0028] (2) Adjust the pH of the cetyltrimethylammonium bromide aqueous solution to 9-10 with ammonia water with a mass fraction of 10%, add ethyl orthosilicate, and stir at 600-800r / min at room temperature for 20-40min, get the mixture;

[0029] (3) Put the mixed solution in a water bath at 40-50°C for 40-48h, filter, wash the filter residue with deionized water for 3-5 times, and dry at 60-80°C for 10-20h to obtain a dry solid ;

[0030] (4) Grinding the dried solid into powder, and calcining in a muffle furnace at 500-600°C for 4-6 hours to obtain mesoporous silica powder with an average particle size of 60-80nm.

[0031] The preparation method of the sound-absorbing and noise-reducing composite r...

Embodiment 1

[0036] A sound-absorbing and noise-reducing composite rubber. The raw materials include: 100 parts of EPDM rubber, 20 parts of vulcanized butyl rubber, 15 parts of mesoporous silica, 2 parts of stearic acid, 0.6 parts of Azobisisobutyronitrile; wherein, the raw materials of the mesoporous silica include: 6 parts of ethyl orthosilicate, 1 part of cetyltrimethylammonium bromide, 30 parts of ionized water.

[0037] The preparation method of described mesoporous silica, comprises the following steps:

[0038] (1) Add cetyltrimethylammonium bromide into deionized water, and stir at 200r / min for 2min at room temperature to obtain cetyltrimethylammonium bromide aqueous solution;

[0039] (2) Adjust the pH of the cetyltrimethylammonium bromide aqueous solution to 9 with ammonia water with a mass fraction of 10%, add tetraethyl orthosilicate, and stir at 600r / min for 20min at room temperature to obtain a mixed solution;

[0040] (3) The mixture was reacted in a water bath at 40°C for...

Embodiment 2

[0048] A sound-absorbing and noise-reducing composite rubber. The raw materials include: 100 parts of EPDM rubber, 40 parts of vulcanized butyl rubber, 15 parts of mesoporous silica, 8 parts of stearic acid, 0.6 parts of Azobisisobutyronitrile; wherein, the raw materials of the mesoporous silica include: 12 parts of ethyl orthosilicate, 1 part of cetyltrimethylammonium bromide, 60 parts of ionized water.

[0049] The preparation method of described mesoporous silica, comprises the following steps:

[0050] (1) Add cetyltrimethylammonium bromide into deionized water, and stir at 200r / min for 4min at room temperature to obtain cetyltrimethylammonium bromide aqueous solution;

[0051](2) Adjust the pH of the cetyltrimethylammonium bromide aqueous solution to 10 with ammonia water with a mass fraction of 10%, add tetraethyl orthosilicate, and stir at 600r / min for 40min at room temperature to obtain a mixed solution;

[0052] (3) The mixture was reacted in a water bath at 40°C fo...

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Abstract

The invention discloses sound absorption and noise reduction type composite rubber, which is prepared from 100 to 120 parts of ethylene propylene diene monomer, 20 to 40 parts of vulcanized butyl rubber, 15 to 30 parts of mesoporous silicon dioxide, 2 to 8 parts of stearic acid and 0.6 to 0.8 part of azodiisobutyronitrile. Molecular chains in molecules of the ethylene propylene diene monomer and the vulcanized butyl rubber are multiple in motion form and type, wide in relaxation time spectrum peak and capable of absorbing sound waves of a wide frequency band, when the sound waves enter the surface of the rubber, most of the sound waves enter the rubber to be spread, sound energy is absorbed by the rubber and converted into heat energy to be dissipated, and therefore, the sound absorption effect is achieved. Mesoporous silicon dioxide with a large number of fine pores is added into the sound absorption and noise reduction type composite rubber, and sound energy spread in the rubber can be dissipated, so that part of sound energy is further reduced, and the sound absorption effect of the rubber is improved.

Description

technical field [0001] The invention relates to a sound-absorbing and noise-reducing composite rubber and a preparation method thereof, belonging to the technical field of rubber. Background technique [0002] EPDM rubber is an important rubber product. EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes. It is widely used in automotive parts, waterproof materials for construction, wire and cable sheaths, heat-resistant hoses, tapes, automotive seals, etc. Such as high and low temperature resistance, ozone resistance, weather resistance and electrical insulation, etc., but the sound absorption performance of EPDM rubber is not very high, and it cannot absorb sound waves and reduce noise. Contents of the invention [0003] The technical problem that the present invention mainly solves: [0004] The sound absorption performance of EPDM rubber is not very high, and it cannot absorb sound waves and reduce noise. [0005] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/22C08K7/26
CPCC08L23/16C08L23/22C08K7/26
Inventor 陈国林
Owner 深圳市奥科杰环保材料科技有限公司
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