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Dendritic polyurethane, preparation method thereof and application of dendritic polyurethane in chlorinated butyl damping rubber

A polyurethane and dendritic technology, applied in the field of damping materials, can solve the problems of insufficient damping performance, poor mechanical performance, and insufficient effective damping temperature range, and achieve increased hydrogen bonding, mechanical properties and thermal conductivity. The effect of improved damping performance

Active Publication Date: 2022-03-29
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chlorinated butyl rubber still has defects such as insufficiently wide range of effective damping temperature range, unstable damping performance and poor mechanical properties, so its application field has certain limitations.

Method used

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  • Dendritic polyurethane, preparation method thereof and application of dendritic polyurethane in chlorinated butyl damping rubber
  • Dendritic polyurethane, preparation method thereof and application of dendritic polyurethane in chlorinated butyl damping rubber
  • Dendritic polyurethane, preparation method thereof and application of dendritic polyurethane in chlorinated butyl damping rubber

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Experimental program
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preparation example Construction

[0041] The preparation method of dendritic polyurethane comprises the following steps:

[0042] TEA-TL: Dissolve 1.788g (0.012mol, 1eq) of triethanolamine in anhydrous ethyl acetate, add 5.6628g of α-cyano-γ-thiolactone (0.0396mol, each equivalent of hydroxyl corresponds to 1.1 equivalents of isocyanate groups), Add 4-5 drops of DBTL after blowing nitrogen to exhaust oxygen, then raise the temperature to 70°C, and react for 24 hours. The reaction mixture was precipitated with n-hexane, the viscous mixture was dissolved in ethyl acetate and then precipitated with glacial ether, and dried in a vacuum oven at 60°C to obtain a yellow viscous substance.

[0043] Synthesis of G1: 1.734g of G0-TL (0.003mol, 1eq) was dissolved in 10ml of chloroform, 3.375g of 3-amino-1-propanol (5eq / TL functional group, 15eq in total) and 10.44g of acrylic acid-2- Hydroxyethyl ester (10eq / TL functional group, 30eq in total), reacted for 12h. After the reaction was completed, it was precipitated with...

Embodiment 1

[0062] Add 100g of chlorinated butyl rubber, 1g of stearic acid, 5g of nano-zinc oxide, 1.5g of accelerator M, 2g of anti-aging agent A, 0.15g of light magnesium oxide, 1g of coordinated G2-Py and 1g of sulfur according to the above ratio In the open mill, kneading is carried out under the condition that the temperature of the roller is 30° C., so as to obtain the damping rubber of the present invention.

[0063] The infrared spectrum and molecular weight of each step of dendritic polyurethane are shown in Table 1. The loss factor, tensile strength, elongation at break and thermal conductivity of G2-Py damping rubber are shown in Table 2.

Embodiment 2

[0065] Add 100g of chlorinated butyl rubber, 1g of stearic acid, 5g of nano-zinc oxide, 1.5g of accelerator M, 2g of anti-aging agent A, 0.15g of light magnesium oxide, 3g of coordinated G2-Py and 1g of sulfur according to the above ratio In the open mill, kneading is carried out under the condition that the temperature of the roller is 30° C., so as to obtain the damping rubber of the present invention.

[0066] The infrared spectrum and molecular weight of each step of dendritic polyurethane are shown in Table 1. The loss factor, tensile strength, elongation at break and thermal conductivity of G2-Py damping rubber are shown in Table 2.

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Abstract

The invention relates to dendritic polyurethane, a preparation method of the dendritic polyurethane and application of the dendritic polyurethane to chlorinated butyl rubber damping rubber. The dendritic polyurethane is applied to a damping chlorinated butyl rubber material. The rubber material comprises the following components in parts by mass: 100 parts of chlorinated butyl rubber, 1-3 parts of a vulcanizing agent, 1-3 parts of an accelerant M, 1-2 parts of stearic acid, 3-5 parts of nano-zinc oxide, 0.5-2 parts of light magnesium oxide, 2-4 parts of an anti-aging agent A and 1-10 parts of dendritic polyurethane. Compared with the prior art, the G2-Py dendritic polyurethane is applied to the chlorinated butyl rubber, and the energy of the system is dissipated by introducing double non-covalent bonds, so that the damping performance, the mechanical property, the heat-conducting property and the like of the product are remarkably improved, and particularly, the damping performance of the rubber is greatly improved; the use limitation of the chlorinated butyl rubber is improved, and the application prospect is very wide.

Description

technical field [0001] The invention relates to the field of damping materials, in particular to a dendritic polyurethane, a preparation method thereof and an application in chlorinated butyl damping rubber. Background technique [0002] With the rapid development of modern science and technology, mechanical equipment tends to be high-frequency and high-speed, which brings convenience to daily production and life, but also produces a series of problems, such as high-frequency vibration and noise. These problems not only accelerate the fatigue damage of mechanical structural materials and shorten their service life, but also affect people's daily life to a certain extent. Therefore, it is very important to develop high-efficiency damping materials with excellent performance and improve the application of their damping and shock absorption to improve the operating environment of machinery. Damping material, as a special functional material for vibration reduction and noise re...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/32C08G18/28C08L23/28C08L75/14C08K3/22
CPCC08G18/672C08G18/3281C08G18/3271C08G18/2865C08L23/283C08K2003/2296C08K2201/011C08K2003/222C08K2201/005C08L2205/14C08L75/14C08K3/22
Inventor 陈嘉诚王锦成王贤超代伟森费凡柴欣胡婉颖唐宏焱李述洪向恺灵
Owner SHANGHAI UNIV OF ENG SCI
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