Network structure design-based wide-temperature range polyurethane elastomer damping material and method and application thereof

A polyurethane elastomer and damping material technology, applied in the field of damping materials, can solve the problems of damage to the mechanical properties of polymer materials, inability to meet actual use requirements, poor damping effect, etc., and achieve improved compatibility, good damping performance, and conformation. changeable effect

Active Publication Date: 2017-08-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some scholars have explored the introduction of suspension chains (molecular chains with one end fixed in the cross-linked network and the other end can move freely) in polymer materials to improve their damping performance, but the design of damping polymer materials based on a single molecular structure, its The effective damping at high temperature and low temperature is narrow. If the suspension chain content is too high, the mechanical properties of the polymer material will be damaged too much, which cannot meet the actual use requirements.
[0004] Polyurethane elastomer damping materials have become one of the research focuses of elastomer damping materials because of their advantages such as flexible structural design, controllability of preparation, and low price. However, polyurethane damping materi

Method used

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  • Network structure design-based wide-temperature range polyurethane elastomer damping material and method and application thereof
  • Network structure design-based wide-temperature range polyurethane elastomer damping material and method and application thereof
  • Network structure design-based wide-temperature range polyurethane elastomer damping material and method and application thereof

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Embodiment 1

[0054] A method for preparing a wide temperature range polyurethane elastomer damping material based on network structure design, comprising the following steps:

[0055] (1) Under the condition of stirring (200r / min), 20 parts by weight of polyester diol are subjected to vacuum drying treatment (the condition of vacuum drying treatment is to dry at 100°C for 2.5h under 1MPa pressure) to obtain pretreated of polyester diol;

[0056] (2) the polyester diol of pretreatment in step (1) is cooled to room temperature, closes vacuum pump, logical N 2 , stirring at a medium speed (250r / min), adding 3 parts by weight of TDI, heating up to 80°C, adding dropwise 0.003 parts by weight of dibutyltin dilaurate as a catalyst, keeping the temperature for 1.5h, stopping the reaction, and obtaining an elastic main chain prepolymer that is Polyurethane prepolymer, N 2 Save under atmosphere;

[0057] (3) in N 2 Under the protection of atmosphere, add 3 parts by weight of TDI to 10 parts by w...

Embodiment 2

[0060] A method for preparing a wide temperature range polyurethane elastomer damping material based on network structure design, comprising the following steps:

[0061] (1) Under the condition of stirring (200r / min), 30 parts by weight of polyester diol are subjected to vacuum drying treatment (the condition of vacuum drying treatment is to dry at 100°C for 2.5h under 1MPa pressure), to obtain pretreated of polyester diol;

[0062] (2) the polyester diol of pretreatment in step (1) is down to room temperature, closes vacuum pump, logical N 2 , N 2 Add 7 parts by weight of TDI under the protection of the atmosphere, stir at a medium speed (250r / min), heat up to 80°C, add 0.004 parts by weight of the catalyst dibutyltin dilaurate dropwise, keep the temperature for 1.5h, stop the reaction, and obtain the elastic main chain prepolymerization The material is polyurethane prepolymer, N 2 Save under atmosphere;

[0063] (3) in N 2 Under the protection of atmosphere, add 5 part...

Embodiment 3

[0066] A method for preparing a wide temperature range polyurethane elastomer damping material based on network structure design, comprising the following steps:

[0067] (1) Under the condition of stirring (200r / min), 15 parts by weight of polyester diol are vacuum-dried (the condition of vacuum-dried treatment is to dry at 100°C for 2.5h under 1MPa pressure) to obtain pre-treated of polyester diol;

[0068] (2) the polyester diol of pretreatment in step (1) is down to room temperature, closes vacuum pump, logical N 2 , add 3 parts by weight of TDI, stir at medium speed (250r / min), heat up to 80°C within a few minutes, add 0.0015 parts by weight of catalyst dibutyltin dilaurate dropwise, keep warm for 1.5h, stop the reaction, and obtain the elastic main chain Prepolymer is polyurethane prepolymer, N 2 Save under atmosphere;

[0069] (3) in N 2 Under the protection of atmosphere, add 3 parts by weight of TDI to 5 parts by weight of polyethylene glycol monomethyl ether (mol...

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Abstract

The invention belongs to the technical field of damping materials and discloses a network structure design-based wide-temperature range polyurethane elastomer damping material and a method and application thereof. The network structure design-based wide-temperature range polyurethane elastomer damping material is prepared from, by weight part, 11-37 parts of polyurethane prepolymer, 7-30 parts of suspension chain prepolymer and 1-25 parts of terminal hydroxyl hyperbranched polyester, wherein the polyurethane is obtained through reaction of polyester glycol and diisocyanate under the action of catalyst. The network structure design-based wide-temperature range polyurethane elastomer damping material achieves an effective damping temperature range width of 170 DEG C and obtains excellent damping performance within the temperature range width, and the damping factor tan delta is higher than or equal to 0.3. Meanwhile, the network structure design-based wide-temperature range polyurethane elastomer damping material is good in high-temperature and low-temperature damping performance and achieves a high-temperature effective damping temperature up to 120 DEC, thereby having a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of damping materials, and relates to a polyurethane elastomer, in particular to a wide temperature range polyurethane elastomer damping material based on network structure design and its preparation method and application. Background technique [0002] With the rapid development of science and technology, both military and civilian products are developing in the direction of low energy consumption, high speed, and lightweight mechanical automation. At the same time, vibration and noise generated by high automation are flooding every corner of life. The impact on life cannot be underestimated. [0003] The problem of reducing vibration and noise has become a top priority, and domestic and foreign researchers have responded to this problem by exploring new damping materials. Wide temperature range high damping material requires at least 60 ℃ ~ 80 ℃ temperature range (use ambient temperature range), its dampin...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/42C08G18/48C08G18/10
CPCC08G18/10C08G18/2805C08G18/42C08G18/7614C08G2350/00
Inventor 卢珣李翰模杨一林程波
Owner SOUTH CHINA UNIV OF TECH
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