Modified melamine formaldehyde resin composite material and preparation method thereof

Abstract

The invention discloses a modified melamine formaldehyde resin composite material and a preparation method thereof. The formula comprises melamine, a formaldehyde solution, silicon carbide, glass cloth, asbestos, polyethylene glycol, sodium hydroxide, semicarbazide, a coupling agent, a curing agent, a coloring agent and a defoaming agent. The toughness and plasticity of the composite material are improved through modification, the impact shear strength of the composite material is enhanced, the problem that the composite material is broken due to impact shear stress in the using process is solved, the potential safety hazard of the composite material is eliminated, and the working reliability of a composite material workpiece is improved; the residual amount of free formaldehyde in the composite material is reduced through formaldehyde elimination, the formaldehyde volatilization amount of the composite material is reduced, the harm of the composite material to human, animals and the environment is avoided, and the free formaldehyde volatilized in the preparation process is treated, so that the influence of formaldehyde gas on workers is avoided, and the preparation efficiency of the composite material is improved; and the body health of personnel is maintained.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a modified melamine-formaldehyde resin composite material and a preparation method thereof. Background technique [0002] Melamine-formaldehyde resin composite material is a composite material made of melamine-formaldehyde resin as a matrix and fillers such as chopped glass fiber, glass cloth and asbestos as reinforcements. Melamine formaldehyde resin composite materials are mainly used to make high-performance electrical insulation products and arc-resistant parts, such as explosion-proof electrical accessories, electric tool insulation parts, etc., and are also used to make heat-resistant and water-resistant daily necessities, such as tableware. A new type of material with wide application. [0003] However, most of the traditional melamine-formaldehyde resin composite materials have the following problems: First, the residual free formaldehyde in the composite mat...

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Problems solved by technology

[0003] However, most of the traditional melamine-formaldehyde resin composite materials have the following problems: First, the residual free formaldehyde in the composite material has not been removed, and formaldehyde has high activity and is easily diffused into the air, which will inevitably affect the People, animals and the environment cause certain harm; secondly, the toughness and plasticity of composite materials are insufficient, and the impact shear strength is poor. During use, they are prone to fracture due to impact shear stress, and there are certain safety hazards, which affect the composite materials. The working reliability of the parts; third, the free formaldehyde volatilized during the preparation process was not treated, which caused the staff to feel uncomfortable after inhaling formaldehyde gas, which not only affected the preparation efficiency of the composite material, but also damaged the health of the staff

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