Damping resin emulsion and preparation method thereof

Abstract

The invention provides damping resin emulsion. The damping resin emulsion is characterized by being prepared from, by weight, 10-50 parts of a functional acrylic monomer, 100-150 parts of an acrylic monomer, 4-20 parts of a cross-linking monomer 1, 1-10 parts of a cross-linking monomer 2, 4-20 parts of an emulsifying agent, 0.3-1 part of an initiator and 200-400 parts of deionized water. The functional acrylic monomer is prepared from hydroxyethyl acrylate, isophorone diisocyanate, an antioxidant 1010, an acetone and butanone mixed solvent and a catalyst according to a weight ratio of (50-60):(110-150):(170-210):(100-200):(0.01-1), wherein the acetone and butanone mixed solvent is a mixed solvent made from acetone and butanone according to a mass ratio of (1-3):10, and the catalyst refersto dibutyltin dilaurate. The damping resin emulsion is great in film forming performance, wide in damping temperature range and excellent in damping effect and can be widely applied to vibration damping and noise reduction of airplanes, ships, buildings, transportation and various machines.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a damping resin emulsion and a preparation method thereof. Background technique [0002] Organic polymer damping coating is a special functional coating with vibration reduction, noise reduction and certain sealing performance, which can be widely used in vibration reduction and noise reduction of aircraft, ships and various machinery. Nowadays, the damping coatings commonly used to control the noise environment in the car are represented by asphalt, neoprene rubber and nitrile rubber water-based coatings, but they are easy to burn, require high ambient temperature, poor adhesion to substrates, and production. Disadvantages such as complicated process and high cost are not convenient for mass production and use. Among the damping coatings, water-based acrylic damping coatings have broad application prospects because of their excellent damping properties, ea...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned technical problems such as uneven mixing of hindered phenol and acrylic resin, poor compatibility, poor damping performance of existing resins, narrow damping temperature range, etc. A damping resin emulsion with long-lasting damping effect and easy large-scale production and its preparation method. In the present invention, hindered phenol is introduced into a functional acrylate monomer containing hindered phenol through chemical modification technology, and then successfully prepared through emulsion copolymerization preparation technology. On the basis of a series of macromolecular water-based damping resins, a macromolecular water-based damping resin emulsion was prepared by screening hindered phenol and acrylate monomers with different chemical structures, which has a wider temperature range and a longer service life

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