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Noise damping composition

A technology of damping and composition, which is applied in the field of noise damping products, can solve the problems of increasing weight, and achieve the effects of low cost, excellent vibration damping performance, and excellent noise suppression

Inactive Publication Date: 2015-02-25
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of this method is that it adds a lot of weight to the original weight of its underlying structure, sometimes as much as 20-30%

Method used

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  • Noise damping composition
  • Noise damping composition
  • Noise damping composition

Examples

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Embodiment

[0094] The abbreviation "E" means "Example", "C" means "Comparative Example", followed by a number indicating in which example the composition was prepared. All examples and comparative examples were prepared and tested in a similar manner. Percentages are by weight unless otherwise indicated.

[0095] Material

[0096] PA1: polyamide 66 resin, produced by DuPont, trade name 101LNC010.

[0097] PA2: polyamide 66, which contains 35% by weight of reinforced glass fibers, produced by DuPont under the trade name 70G35BK267.

[0098] PA3: polyamide 6, which contains 35% by weight of reinforced glass fibers, produced by DuPont under the trade name 73G35BK262.

[0099] N-ZnO: short for nano-zinc oxide, with an average particle size of about 30 nm, surface-modified with 2 wt% KH570; purchased from Hangzhou Wanjing New Material Co., Ltd., China. KH570 is a silane coupling agent, 3-(methacryloyloxy)propyltrimethoxysilane (cas number 2530-85-0).

[0100]T-ZnOw: Abbreviation ...

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Abstract

Disclosed are thermoplastic compositions having excellent vibration damping and noise suppression properties and molded articles made therefrom that can be manufactured inexpensively. The noise damping compositions of the present invention being (a) about 50-85 weight % of a polyamide; (b) about 5-45 weight % of a fibrous reinforcing agent; (c) about 1-25 weight % of zinc oxide; and (d) about 0-15 weight % of other additive; wherein the weight % is based on the total weight of the noise damping composition, and provided that the composition has essentially no flame retardants.

Description

technical field [0001] The present invention relates to thermoplastic compositions having improved vibration damping and noise suppression. The compositions of the invention are particularly suitable for use in damping noise generated by drive train internal components in vehicles. The invention also relates to noise damping articles molded from said composition. Background technique [0002] Fiber-reinforced composites have emerged as a powerful lightweight alternative to metals when materials with high specific stiffness, high strength, and controlled expansion are required. These composite materials have been effectively used in commercial transportation systems. While the customizability of composite materials provides an effective avenue for design optimization of components that must meet lightweight and stringent thermal and mechanical system requirements, these components still exhibit suboptimal vibration and noise levels. For example, engine noise can be transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L77/10C08K7/14C08K7/06C08K7/08C08K3/22
CPCC08K3/22C08K7/02C08K2003/2296C08L77/00B82Y30/00C08J5/04C08K7/08C08K13/04
Inventor 王颖娟王枫
Owner EI DU PONT DE NEMOURS & CO
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