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Wide-temperature-range gradient multi-layer self-adhesive constrained damping material and preparation method thereof

A constrained damping, self-adhesive technology, applied in the field of damping materials, can solve the problems of narrow effective damping temperature range, narrow application range and high characteristic requirements of composite damping materials, and achieve the goal of improving the effective damping temperature range, widening the use temperature range, improving the The effect of damping values

Active Publication Date: 2022-02-08
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in this patent, the plastic constrained layer used also needs to have certain damping characteristics, so that the damping loss peaks of the constrained layer and the damping layer can be overlapped to broaden the effective damping temperature range. High, and the effective damping temperature range of the composite damping material is narrow, the scope of application is narrow, and it is not suitable for shock absorption and noise reduction on ships

Method used

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  • Wide-temperature-range gradient multi-layer self-adhesive constrained damping material and preparation method thereof
  • Wide-temperature-range gradient multi-layer self-adhesive constrained damping material and preparation method thereof
  • Wide-temperature-range gradient multi-layer self-adhesive constrained damping material and preparation method thereof

Examples

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preparation example Construction

[0029] Preparation of low-temperature damping layer material (IIR1): choose butyl rubber as the base material, add 100phr short-chain polyisobutylene, and knead at 130°C for 120min to obtain low-temperature damping material. After testing, its loss peak at -34.2°C is 2.22, the glass transition temperature is -66.7℃.

[0030] Preparation of intermediate temperature damping layer material (IIR2): select butyl rubber as the base material, add 100phr long-chain polyisobutylene and 100phrP125 petroleum resin, mix at 130°C for 120min, and obtain intermediate temperature damping material. The loss peak is 1.9, and the glass transition temperature is -49.3°C.

[0031] Preparation of high-temperature damping layer material (IIR3): select butyl rubber as the base material, add 100phr long-chain polyisobutylene and 400phrP125 petroleum resin, and mix at 130°C for 120min to obtain high-temperature damping material. The loss peak is 2.7, and the glass transition temperature is -8.9°C.

...

Embodiment 1-5

[0036] Table 1 shows the specific structure of the multi-layer damping material in Examples 1-5, wherein the serial number 1 indicates the layer close to the base steel, the serial number 2 is the second layer, and so on. The unit of the thickness of each layer is mm.

[0037] The multilayer damping material of table 1 embodiment 1-5

[0038]

[0039]

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a wide-temperature-range gradient multi-layer self-adhesive constrained damping material and a preparation method thereof. The wide-temperature-range gradient multi-layer self-adhesive constrained damping material comprises multiple damping layers and multiple restraint layers, and the multiple damping layers and the multiple restraint layers are alternately stacked. The elastic modulus of at least one restraint layer is different from that of the other restraint layers, and the multiple restraint layers with different elastic moduli are alternately stacked. According to the damping material, the elastic moduli of the multiple restraint layers are different, the restraint layers with the different elastic moduli provide different effects for the damping layers, the restraint layers mainly play a restraint role, and when the damping material is subjected to external force, the restraint layers restrain movement of the damping layers, the damping layers is subjected to shear force as much as possible to consume more energy, and the damping performance is improved.

Description

technical field [0001] The invention relates to the technical field of damping materials, in particular to a wide temperature range gradient multilayer self-adhesive constrained damping material and a preparation method thereof. Background technique [0002] Ships are equipped with a large number of mechanical equipment, and these mechanical equipment will inevitably produce vibration and noise when they are working. The use of constrained damping structures for vibration reduction can reduce the impact of vibration and noise on ships, that is, laying high damping materials on vibrating structures to absorb and consume the energy generated by structural vibrations, thereby achieving the effect of vibration and noise reduction. [0003] At present, many multi-layer damping materials are researched and applied in the form of "free layer-constrained layer-" alternate arrangement. This arrangement can improve the damping performance of the structure as a whole, but it widens the...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09J7/30C09J123/22C09J11/08
CPCC09J7/29C09J7/30C09J123/22C09J11/08C09J2301/122C09J2301/162C09J2463/006C09J2203/35C08L23/20C08L57/02
Inventor 李姜秦超郭少云沈梦露张捷冯强
Owner SICHUAN UNIV
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