Low-density high-strength reinforced rubber sheet convenient for low-temperature construction and preparation method thereof

Abstract

The invention discloses a low-density high-strength reinforced rubber sheet convenient for low-temperature construction and a preparation method thereof. The reinforced rubber sheet is compounded from an adhesive layer and a glass fiber reinforcement layer. The adhesive layer is composed of the following raw materials in percentage by mass: 40-60% of solid epoxy resin, 15-20% of non-polar rubber, 15-20% of liquid rubber, 3-6% of epoxy resin curing agent, 0.5-1% of rubber vulcanizing agent, 5-10% of foaming agent and 5-10% of thixotropic agent. The adhesive layer of the reinforced rubber sheet adopts the non-polar rubber with favorable compatibility with the oil surface and the liquid rubber with favorable low-temperature viscosity ratio to lower the epoxy dispersion force, so that the reinforced rubber sheet can be constructed on a steel plate at low temperature, thereby ensuring the bonding effect. The solid epoxy resin is creatively adopted, thereby avoiding the problems of incapability of forming due to excessive liquid epoxy resin, poor oil surface construction, and poor reinforcing effect due to phase separation and precipitation in the system in the adhesive layer composition on the premise of satisfying that the epoxy resin consumption ensures the reinforcing effect.

Description

technical field [0001] The invention relates to the field of reinforcing films for thin steel plates of automobile bodies, in particular to a low-density, high-strength reinforcing film which is convenient for low-temperature construction and a preparation method thereof. Background technique [0002] In the modern automobile industry, the automobile body uses thinner steel plates to reduce the weight of the vehicle and achieve lightweight, which is one of the important means to save energy and reduce pollution. However, the thinning of the steel plate will bring some negative effects: the local stiffness of the outer body panel will decrease, and large-area sheet metal parts such as the door, top cover, and side wall will easily vibrate and generate noise during the driving process of the car, which will affect the NVH performance of the whole vehicle . In order to solve the above-mentioned drawbacks, one of the measures taken by the automobile industry is to apply a reinf...

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Problems solved by technology

[0003] Chinese Patent Publication CN1433453A describes a reinforced film with an improved oil-impregnated metal surface, which has an adhesive layer comprising an epoxy-terminated addition of epoxy resin to rubber containing a small amount of nitrile monomer Compound, the reinforcement effect of the reinforced film is not good under the condition of the initial thickness of 1.0mm

This scheme has improved stability, but because the initial viscosity of the matrix is ​​too high, it is impossible to obtain a high expansion ratio reinforced film, and the density reduction is limited, and the reinforcement effect at the same thickness is still insufficient.

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