A kind of underwater sound absorption rubber composite material and preparation method thereof

A composite material and sound-absorbing rubber technology, applied in the field of underwater sound-absorbing materials, can solve the problems of difficulty in meeting the use requirements of underwater sound-absorbing rubber products, low sound absorption coefficient, etc.

Active Publication Date: 2021-06-15
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the sound absorption coefficient of the existing rubber composite materials at low frequencies is low, especially the average sound absorption coefficient below 20kHz is generally lower than 90%, which is difficult to meet the needs of various underwater acoustic rubber products such as anechoic pools and submersible coverings. requirements for use

Method used

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  • A kind of underwater sound absorption rubber composite material and preparation method thereof
  • A kind of underwater sound absorption rubber composite material and preparation method thereof
  • A kind of underwater sound absorption rubber composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of the underwater sound-absorbing rubber composite material in this embodiment, the steps are as follows:

[0039] Raw materials are equipped according to Table 1, nitrile rubber (acrylonitrile content 28%), neoprene rubber, stearic acid, magnesium oxide, hindered phenol damping agent A0-80, carbon black, expanded perlite powder (80 mesh), wood Cellulose, DOS and flowable dispersant WB212 were put into the internal mixer for mixing, the mixing temperature was 140°C, and the mixing time was 5 minutes; then the materials were fed into the open mixer, and the open mixer was used for thin pass, roll The gap is 1mm, thin pass about 5 times, until the brown-yellow fiber visible to the naked eye disappears, then put the mixed rubber into the internal mixer, add vulcanizing agent, vulcanizing aid and anti-scorch agent, and mix at below 90 ° C. Refining for 2 minutes, discharging, unloading, cooling, and parking for 16 hours to obtain the mixed rubber; vul...

Embodiment 2

[0042] The preparation method of the underwater sound-absorbing rubber composite material in this embodiment, the steps are as follows:

[0043] Raw materials are equipped according to Table 1, nitrile rubber (acrylonitrile content 41%), neoprene rubber, stearic acid, magnesium oxide, hindered phenol damping agent A0-80, carbon black, expanded perlite powder (80 mesh), wood Cellulose, DOS and flowable dispersant WB212 were put into the internal mixer for mixing, the mixing temperature was 140°C, and the mixing time was 5 minutes; then the materials were fed into the open mixer, and the open mixer was used for thin pass, roll The distance is 1mm, thin pass about 5 times, until the brown-yellow fiber visible to the naked eye disappears, then put the mixed rubber into the internal mixer, add vulcanizing agent, vulcanizing aid and anti-scorch agent CTP, and keep the temperature below 90°C Mixing for 2 minutes, discharging, unloading, cooling, and parking for 16 hours to obtain the...

Embodiment 3

[0046] The preparation method of the underwater sound-absorbing rubber composite material in this embodiment, the steps are as follows:

[0047] Raw materials are equipped according to Table 1, with nitrile rubber (41% acrylonitrile content), 70 parts of neoprene, stearic acid, magnesium oxide, hindered phenol damping agent A0-80, carbon black, expanded perlite powder (150 mesh) , lignocellulose, DOS and flow dispersant WB212 are put into the internal mixer for mixing, the mixing temperature is 140°C, and the mixing time is 5 minutes; then the materials are fed into the open mixer, and the thin pass is carried out using the open mixer , the roller distance is 1mm, thin pass about 5 times, until the brown-yellow fiber visible to the naked eye disappears, then put the mixed rubber into the internal mixer, add vulcanizing agent, vulcanization aid and anti-scorch agent CTP, at 90 Mix for 2 minutes below ℃, discharge, release, cool, and park for 16 hours to obtain the mixed rubber;...

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Abstract

The invention discloses an underwater sound-absorbing rubber composite material, which is mainly prepared from the following raw materials in parts by mass: nitrile rubber, neoprene rubber, hindered phenol damping agent, fiber or tube-rod filler, porous silicate filler , carbon black, softener, anti-aging agent, stabilizer, vulcanization activator, vulcanization agent and vulcanization assistant. The invention also discloses a preparation method of the underwater sound-absorbing rubber composite material. In the present invention, nitrile rubber and chloroprene rubber are used together, and hindered phenolic damping agent is added, which can be coupled with the two at the same time, and the underwater acoustic absorber is prepared through multiple dissipation effects of expanded perlite / lignocellulose or carbon nanotubes. The acoustic rubber composite material has an average sound absorption coefficient greater than 90% in the commonly used 20kHz, which overcomes the problem of insufficient sound absorption coefficient at low and medium frequencies in the prior art, and has good physical and mechanical properties, and the materials are simple and easy to obtain, and the cost is low.

Description

technical field [0001] The invention belongs to underwater sound-absorbing materials, in particular to an underwater sound-absorbing rubber composite material with high sound-absorbing coefficient and a preparation method thereof. Background technique [0002] Hydroacoustic rubber plays an important role in the propagation of sound waves in water. It can eliminate the reflection of sound, reduce noise, keep the transmission of sound waves without distortion, and avoid the interference of various underwater noises. According to the role of rubber in underwater acoustic engineering, it can be divided into three types: sound-absorbing rubber, sound-transmitting rubber and anti-sound rubber. As an underwater sound-absorbing material, two conditions must be met: (1) The characteristic acoustic impedance of the material must match the characteristic acoustic impedance of the medium water, so that the sound wave can enter the sound-absorbing system without reflection; (2) The mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L11/00C08L9/02C08L97/02C08K13/04C08K7/26C08K5/09C08K3/22C08K3/04
CPCC08K2003/222C08L11/00C08L2205/03C08L2205/16C08L9/02C08L97/02C08K13/04C08K7/26C08K5/09C08K3/22C08K3/04C08K3/041
Inventor 李远於珂睿朱伟陈彰斌秦伟陈琪熊昌义颜渊魏黄自华姜其斌
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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