Sound insulation material for automobiles and preparation method thereof

Abstract

The invention discloses a sound insulation material for automobiles and a preparation method thereof. The sound insulation material comprises the following raw materials in parts by weight: 80-150 parts of raw natural rubber, 3-30 parts of acrylic emulsion, 1-20 parts of styrene-acrylic emulsion, 5-50 pars of polyurethane, 1-25 parts of nano silica, 0.5-12 parts of 8-oxine copper, 0.1-10 parts of oxidant, 1-30 parts of graphite, 1-15 parts of chitosan, 1-20 parts of molecular sieve, 0.2-10 parts of dioctyldilauryltin, 0.2-25 parts of polyethylene glycol, 0.1-5 parts of di-dodecyl dimethyl ammonium bromide, 3-40 parts of mica powder and 1-10 parts of coupling agent. The sound insulation material is obtained by putting smelted raw natural rubber into a mixer, adding other raw materials and performing mixing and extrusion molding. The sound insulation material has a good sound insulation effect; and meanwhile, the sound insulation and sound attenuation functions can be further enhanced by adding the styrene-acrylic emulsion and the polyurethane, so that propagation of noise can be weakened to protect ears. The material prepared by the preparation method is light, and conforms to the trend of lightweight of automobiles.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a sound-insulating material for automobiles and a preparation method thereof. Background technique [0002] Along with the raising of people's living standard, automobile has become a kind of common means of transportation, and its popularity rate is increasing day by day. When the car is started, the engine and other parts will produce noise, and the external noise will also spread into the car, and the driver in the car will hear the noise. The noise acceptable to human beings is below 44 decibels, and people will start to feel it when it exceeds 44 decibels Discomfort, when the driver hears too much noise, it will affect his normal thinking, lead to wrong judgment, and even traffic accidents, resulting in casualties. Absorbing noise and reducing noise pollution are important issues related to the coordinated development of human society. With the deepening of research, v...

AI Technical Summary

Problems solved by technology

The combination of various thermoplastic resin molecules in the sound insulation layer of the traditional formula automobile sound insulation material is not tight enough, and the interface between the thermoplastic resin and the filler is poorly bonded, not dense enough, and it is difficult to achieve the ideal sound insulation effect, and due to the addition of a large amount of inorganic fillers , which increases the weight of materials, which deviates from the trend of lightweight vehicles