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High-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material and preparation method thereof

A technology of polyurethane elastomer and high temperature resistance, which is applied in the field of damping materials, can solve the problems of further improvement of mechanical properties and high temperature resistance, and achieve the effects of widening the damping temperature range, improving damping performance, and improving damping performance

Active Publication Date: 2020-03-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The damping material of the invention has an effective damping temperature range width of about 170°C, excellent damping performance in the temperature range, and its damping factor tanδ≥0.3, and the polyurethane damping material of the invention has good high and low temperature damping performance, and the high temperature effective damping can reach 120°C; Although the effective damping temperature range of this polyurethane is about 170°C, its mechanical properties and high temperature resistance need to be further improved.

Method used

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  • High-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material and preparation method thereof
  • High-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material and preparation method thereof
  • High-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A method for preparing a high-temperature-resistant high-damping elastomer based on dynamic covalent bonds and suspension chains, comprising the following process steps:

[0049] (1) In terms of weight fraction, 20 parts of polybutylene adipate (molecular weight: 2000) was stirred at 110°C while vacuuming to remove water for 2 hours. After the water removal was completed, the temperature was lowered to 75°C and N 2 Protection, add 4 parts of isophorone diisocyanate and 0.02 parts of catalyst dibutyltin dilaurate, maintain the temperature at 75 ° C, stir for 4 hours to obtain a prepolymer, N 2 Save under atmosphere;

[0050] (2) In terms of weight fraction, 2 parts of 4,4'-diaminodiphenyl disulfide (DTDA) were dissolved in N,N-dimethylformamide and added to the prepolymer, and reacted at 70°C for 1 hour to obtain Polyurethane prepolymer after chain extension with disulfide bond small molecules;

[0051] (3) by weight fraction, in N 2 Under the protection of atmosphere...

Embodiment 2

[0054] A method for preparing a high-temperature-resistant high-damping elastomer based on dynamic covalent bonds and suspension chains, comprising the following process steps:

[0055] (1) In terms of weight fraction, 20 parts of polybutylene adipate (molecular weight: 2000) was stirred at 110°C while vacuuming to remove water for 2 hours. After the water removal was completed, the temperature was lowered to 75°C and N 2 Protection, add 4 parts of isophorone diisocyanate and 0.02 parts of catalyst dibutyltin dilaurate, maintain the temperature at 75 ° C, stir for 4 hours to obtain a prepolymer, N 2 Save under atmosphere;

[0056] (2) In terms of weight fraction, 2 parts of 4,4'-diaminodiphenyl disulfide (DTDA) were dissolved in N,N-dimethylformamide and added to the prepolymer, and reacted at 70°C for 1 hour to obtain Polyurethane prepolymer after chain extension with disulfide bond small molecules;

[0057] (3) by weight fraction, in N 2 Under the protection of the atmosp...

Embodiment 3

[0060] A method for preparing a high-temperature-resistant high-damping elastomer based on dynamic covalent bonds and suspension chains, comprising the following process steps:

[0061] (1) In terms of weight fraction, 20 parts of polybutylene adipate (molecular weight: 2000) was stirred at 110°C while vacuuming to remove water for 2 hours. After the water removal was completed, the temperature was lowered to 75°C and N 2 Protection, add 4 parts of isophorone diisocyanate and 0.02 parts of catalyst dibutyltin dilaurate, maintain the temperature at 75 ° C, stir for 4 hours to obtain a prepolymer, N 2 Save under atmosphere;

[0062] (2) In terms of weight fraction, 4 parts of 4,4'-diaminodiphenyl disulfide (DTDA) were dissolved in N,N-dimethylformamide and added to the prepolymer, and reacted at 70°C for 1 hour to obtain Polyurethane prepolymer after chain extension with disulfide bond small molecules;

[0063] (3) by weight fraction, in N 2 Under the protection of atmosphere...

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Abstract

The invention discloses a high-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material and a preparation method thereof. The raw material formula of the material comprises the following components in parts by weight: 12-48 parts of a polyurethane prepolymer, 2-8 parts of a disulfide bond-containing micromolecular chain extender and 5-25 parts of a suspension chainprepolymer. The polyurethane prepolymer undergoes chain extension in virtue of the disulfide bond-containing micromolecular chain extender and then reacts with the suspension chain prepolymer to obtain the high-temperature-resistant wide-temperature-range high-damping polyurethane elastomer material. According to the invention, a few suspension chain structures can ensure certain mechanical properties while improving the damping performance of the polyurethane material, and the high temperature resistance of polysiloxane can improve the maximum long-term use temperature of polyurethane with the suspension chains; the effective damping temperature range (wherein tan delta is greater than or equal to 0.3) of the obtained damping material exceeds 170 DEG C; and the damping material can be used for a long time at 120 DEG C and has a good application effect.

Description

technical field [0001] The invention relates to a polyurethane elastomer, in particular to a high-temperature-resistant, wide-temperature-range, high-damping polyurethane elastomer based on the synergistic effect of polysiloxane suspension chains and dynamic disulfide exchange reactions and a preparation method thereof; it belongs to the technology of damping materials field. Background technique [0002] The rapid development of industrial society produces more and more noise and vibration, and vibration and noise not only cause fatigue and reduce precision of precision mechanical equipment, but also damage people's health. With the development of science and technology, more stringent requirements are put forward for efficient shock and noise reduction in many fields, especially in high-end precision manufacturing, aerospace, military defense, and building anti-seismic. An important method of shock and noise reduction is the use of damping materials. Elastomer damping ma...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/61C08G18/32
CPCC08G18/3868C08G18/4238C08G18/61C08G18/6651
Inventor 卢珣秦锐周佳辉盛叶明徐敏蒋晓霖王敏慧
Owner SOUTH CHINA UNIV OF TECH
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