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Middle/low frequency sound absorption reduction paint and preparation method thereof

A sound-absorbing and noise-reducing technology, applied in the direction of coating, etc., can solve the problems of narrow sound-absorbing frequency band, poor low-frequency sound-absorbing performance, and high cost of resonant sound-absorbing materials, and achieve simple preparation process steps, good repeatability, and stable performance Effect

Inactive Publication Date: 2015-07-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sound-absorbing frequency band of resonant sound-absorbing materials is narrow, and generally only suitable for single-frequency sounds of medium and low frequencies, and has not been able to replace fibrous sound-absorbing materials for a long time.
In the late 1960s, porous metal sound-absorbing materials such as foam metal and metal fiber appeared, and there were problems such as poor low-frequency sound absorption performance, high cost, and difficult control of process conditions.

Method used

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  • Middle/low frequency sound absorption reduction paint and preparation method thereof
  • Middle/low frequency sound absorption reduction paint and preparation method thereof

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preparation example Construction

[0037] The preparation method of the medium and low frequency sound-absorbing and noise-reducing coating of the present invention is specifically implemented according to the following steps:

[0038] step 1

[0039] Dry the room temperature vulcanized silicone rubber prepolymer, lead zirconate titanate series piezoelectric ceramics, and carbon black to constant weight on an analytical balance; then weigh 51%-78% room temperature vulcanized silicone rubber according to the mass percentage, %-45% lead zirconate titanate series piezoelectric ceramics, 2%-4% carbon black, the sum of the mass percentages of the above components is 100%.

[0040] Among them, the drying method of the room temperature vulcanized silicone rubber prepolymer is as follows: put the room temperature vulcanized silicone rubber prepolymer in a beaker and continuously stir and dry it in the oil at 350°C for 6 hours to 10 hours; lead zirconate titanate series press Electric ceramics and carbon black were dri...

Embodiment 1

[0068] Put the room temperature vulcanized silicone rubber prepolymer in a beaker, stir and dry in oil at 350°C continuously, and stir for 6 hours; the lead zirconate titanate series piezoelectric ceramics and carbon black are dried in an open oven at 110°C in an oven, and dried 4h; According to the mass percentage, take 51% of RTV, 45% of PZT, and 4% of carbon black, pre-pack the zirconia grinding balls into the nylon ball milling jar, put the weighed raw materials into the ball milling jar respectively, and feed The order is PZT, carbon black, RTV prepolymer, 100wt.% 120 gasoline; the ball mill jar is capped, encapsulated on a planetary ball mill, ball milled at 400 rpm for 18 hours, and added 0.1 after ball milling for 9 hours 5wt.% of D-80 curing agent and 4wt.% of D-30 accelerator. Separate the zirconia grinding balls, pour the mixed colloid into the container, let it stand, defoam, and dry at 120°C for 20 minutes. After processing 10 times of rolling and extrusion on th...

Embodiment 2

[0071] Put the room temperature vulcanized silicone rubber prepolymer in a beaker, stir and dry it continuously in oil at 350°C, and stir for 10 hours; the lead zirconate titanate series piezoelectric ceramics and carbon black are dried in an open oven at 110°C, and then dried. Dry for 4 hours; according to the mass percentage, take 78% of RTV, 20% of PZT, and 2% of carbon black, pre-pack the zirconia grinding balls into the nylon ball milling jar, and put the weighed raw materials into the ball milling jar respectively. The feeding sequence is PZT, carbon black, RTV prepolymer, 500wt.% 120 gasoline; the ball mill jar is capped, packaged on a planetary ball mill, ball milled at 300 rpm for 24 hours, and 0.1 5wt.% of D-80 curing agent and 4wt.% of D-30 accelerator. Separate the zirconia grinding balls, pour the mixed colloid into the container, let it stand, defoam, and dry at 120°C for 40 minutes. After processing 15 times of rolling and squeezing on the rolling mill, put it ...

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Abstract

The invention discloses middle / low frequency sound absorption reduction paint. The paint comprises, by mass, 51-78% of room temperature silicon sulfide rubber, 20-45% of lead zirconate titanium series piezoceramics and 2-4% of carbon black, and the sum of the mass percentage of above components is 100%. The invention also discloses a preparation method of the paint. The method comprises steps of sequentially placing raw materials of lead zirconate titanium (PZT), the carbon black, room temperature vulcaniza-tion (RTV) and 120 petrol in a nylon ball milling tank, processing raw materials through a ball milling process, injecting raw materials into a container, standing, deforming, drying, milling, pressing, coating silver electrode, conducting polarization, conducting secondary ball milling and preparing the paint. The prepared paint is good in stability, opaque and applied to sound absorption reduction under the middle / low frequency. The viscosity is in a range of 1200-1700m.Pas-1.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a medium-low frequency sound-absorbing and noise-reducing coating, and also relates to a preparation method of the coating. Background technique [0002] With the development of science and technology and modern industry, noise pollution has become a worldwide problem. Together with water pollution and air pollution, it is listed as the world's three major pollutions, seriously threatening human health. Sound absorption and noise reduction has become one of the bottleneck problems that need to be solved urgently for the coordinated development of technological development, environmental protection and human survival. At present, there are two measures for noise prevention and control: one is to control the sound source, that is, to improve the quality of processing and assembly through equipment improvement to reduce the radiation energy of the sound source, but this measure is li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D7/12
Inventor 冯拉俊王娟娟闫爱军
Owner XIAN UNIV OF TECH