High-temperature resistant high-performance damping adhesive and preparation method thereof

Abstract

The invention discloses a high-temperature resistant high-performance damping adhesive. Polymethyl methacrylate and an ethylene-methyl acrylate-glycidyl methacrylate random terpolymer are melted and mixed evenly by adopting a conventional melting and mixing mode, or an obtained blend is pressed at a high temperature through a conventional method to obtain a damping adhesive film. The decomposition temperature of the obtained damping adhesive is greater than 300 DEG C and the film is clamped between two steel plates and is pressed at high temperature and high pressure to prepare a constrained damping steel plate; and the damping factor Tandelta is greater than 0.3 and the shear and peel strength is greater than 3MPa at 75-140 DEG C. The obtained damping adhesive is high-temperature resistant, and also has excellent properties such as a large damping factor, a wide effective damping temperature range, good adhesion and high shear and peel strength; meanwhile, the problems that a solvent is needed in preparation of a traditional adhesive and secondary solidification is needed in use are solved; and the high-temperature resistant high-performance damping adhesive is especially suitable for bonding of an automotive damping steel plate.

Description

technical field [0001] The invention belongs to the technical field of damping adhesive and its preparation, and in particular relates to a high-temperature-resistant high-performance damping adhesive and a preparation method thereof. Background technique [0002] With the development of modern society, the harm caused by noise and vibration problems is becoming more and more serious. In daily life, noise will have a great impact on people's health. If a person is exposed to a noise environment above 85dB for a long time, it will cause noise-type deafness. In engineering construction, the broadband random vibration generated by vibration and noise will cause the multi-resonance response of structural parts, which will affect the normal operation of structural parts and precision instruments, and will bring catastrophic consequences in severe cases. In the military, due to the high-speed movement of missiles and aircraft, they are affected by the engine and high-speed airflo...

AI Technical Summary

Problems solved by technology

Although this polymer alloy reinforcing film material can effectively enhance the bending strength of the steel plate, has excellent adhesion, and is easy to use, and does not require post-treatment of coating and curing, its damping performance is not good, and it can only be used at room temperature. The range has some damping effect, which cannot meet the requirements for use under high temperature damping

CN106085294A discloses a multifunctional damping film for automobiles. Although the damping film has the performance of reinforcing and damping at room temperature and high temperature, it not only has a complicated film structure, but also has three different adhesive layers, which are respectively self-adhesive The reinforcing adhesive layer, damping adhesive layer and anti-adhesive layer, and because the three adhesive layers are composed of different chemical raw materials, the preparation process is relatively complicated, which needs to be prepared layer by layer, and the prepared film is durable The thermal temperature cannot be higher than 300°C, and the damping factor is only 0.2 at room temperature, and the damping effect is not good

CN103865272A discloses a silicone damping rubber and its preparation method. Although the damping rubber has a wide damping temperature range, it needs to be reacted and solidified at room temperature or under heating conditions because it is a flowable material at room temperature. It is relatively cumbersome to use and increases follow-up operations. On the other hand, the heat resistance is not ideal and cannot exceed 250°C, so it cannot meet the requirements of high-temperature environment processing.

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