Composite damping coating

A composite damping and damping coating technology, which is applied in the direction of synthetic resin layered products, layered products, metal layered products, etc., can solve environmental hazards and other problems, and achieve high loss factor, significant sound insulation effect, and increased specific gravity.

Active Publication Date: 2014-11-05
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethanes synthesized from commonly used aromatic isocyanates will cause environmental hazards due to thermal cracking or hydrolysis under high temperature and high humidity conditions.

Method used

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  • Composite damping coating
  • Composite damping coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, a composite damping coating includes a damping layer and a constrained layer, the damping layer is a solvent-free modified polyurethane damping coating, and the constrained layer is a solvent-free modified epoxy resin constrained coating;

[0038] The solvent-free modified polyurethane damping coating includes the following raw materials in parts by weight:

[0039] A, 100 parts by weight of mixed polyurethane prepolymer (purchased from a damping material company in Macheng City, Hubei Province); Prepared by specific reaction, the hydroxyl polyol is composed of polyester, polyether polyol and castor oil with a mass ratio of 1:1:3.

[0040] B, 30 parts by weight of a hydroxyl-terminated compound; the hydroxyl-terminated compound is mixed from the following raw materials by weight:

[0041] Castor oil polyol 80 parts by weight;

[0042] 30 parts by weight of glycerol;

[0043] 2 parts by weight of silane coupling agent.

[0044] C, 5 parts by weigh...

Embodiment 2

[0054] In this embodiment, a composite damping coating includes a damping layer and a constrained layer, the damping layer is a solvent-free modified polyurethane damping coating, and the constrained layer is a solvent-free modified epoxy resin constrained coating;

[0055] The solvent-free modified polyurethane damping coating includes the following raw materials in parts by weight:

[0056] A, 150 parts by weight of the mixed polyurethane prepolymer; the mixed polyurethane prepolymer is prepared by reacting hydroxypolyol and isophorone diisocyanate in a molar ratio of 40:60, and the hydroxypolyol is It is composed of polyester, polyether polyol and castor oil in a mass ratio of 1:1:3.

[0057] B, 50 parts by weight of a hydroxyl-terminated compound; the hydroxyl-terminated compound is mixed from the following raw materials by weight:

[0058] Castor oil polyol 100 parts by weight;

[0059] 40 parts by weight of glycerol;

[0060] 3 parts by weight of silane coupling agent...

Embodiment 3

[0070] Embodiment 3 performance test

[0071] The composite damping coating that above-mentioned embodiment obtains carries out performance test, and the result is as follows:

[0072]

[0073] It can be seen from the data in the above table that the damping layer of the present invention is solvent-free modified polyurethane, while the damping layer in the prior art is polyether urethane; and the fillers are also different. The fillers of the present invention are carbon fibers, which are light, thin and flexible. Good performance, while the fillers in the prior art composite coatings are scaly fillers. Compared with the existing composite coating, the damping layer loss factor and composite loss factor of the present invention are superior, the damping area is wide, and the hardness is increased, the specific gravity is increased, the sound insulation effect is more significant, the drying time is shortened, and the construction is more convenient. No cracking occurs dur...

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Abstract

The invention discloses a composite damping coating comprising a damping layer and a constraining layer. The damping layer is a solvent-free modified polyurethane damping coating, and the constraining layer is a solvent-free modified epoxy resin constraining coating. According to the composite coating provided by the invention, the constraining layer is used for reducing sound, and the damping layer is used for insulating sound, such that frequency from a sound source can be reduced, and muting and noise reduction purposes can be achieved. The coating provided by the invention has the characteristics of wide damping temperature range, high loss factor after being combined with a metal plate material, good damping effect, and the like. Also, the coating does not contain an organic solvent. The coating has the advantages of normal-temperature curing and convenient and fast construction. The coating is non-toxic and flame-retardant.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a composite damping coating for shock and noise reduction. Background technique [0002] With the rapid development of the national economy, people have higher and higher requirements for noise shielding in the living and working environment. For example, the noise generated by transformers has widely affected residential areas, commercial centers, light stations, airports, factories, mines, enterprises, hospitals, schools and other places, and has attracted people's attention in recent years. In order to reduce the noise of the transformer, the noise source is mainly reduced by improving the structure of the transformer, and through measures such as vibration reduction, sound insulation, and sound absorption, the noise can be attenuated in the propagation path. In the noise reduction treatment technology, it is usually necessary to use a metal plate with a noise reduction funct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/20B32B15/095
Inventor 黄祖成桑成磊温盛科马力王炽荣秦银海付华军郑治
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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