Waste circuit board powder-based toughening type spraying-free color regeneration composite material and preparation method

Abstract

The invention relates to a waste circuit board powder-based toughening type spraying-free color regeneration composite material, which comprises a color surface layer and a filling layer, the color surface layer comprises the following raw materials by weight: 0.5-3 parts of epoxy color paste, 60-80 parts of epoxy resin 100 curing agent, 0.5 parts of curing accelerator, 5-30 parts of flexibilizer and 0.5-2 parts of age resister; and the filling layer comprises the following raw materials by weight: 100-300 parts of epoxy resin 100 waste printed circuit board powder, 60-80 parts of curing agent, 0.5 parts of curing accelerator, 5-30 parts of flexibilizer and 0.5-2 parts of age resister. The material has the following advantages of reasonable formula, low cost, excellent mechanical property (especially impact resistance strength), thereby the problems that a regeneration material in the prior art is difficult to be colored, most material only can be prepared to black or grey products with uncomfortable feeling and limited application scope can be solved. The invention also discloses a preparation method of the above material, and the method has the advantages of simple technology and convenient operation.

Description

technical field [0001] The invention belongs to the technical field of recycled composite materials, and in particular relates to a waste circuit board powder-based toughened spray-free colored recycled composite material and a preparation method thereof. Background technique [0002] Printed circuit board is the foundation of the electronic and electrical industry, one of the core components of electronic and electrical products, covering almost all electronic and electrical products. In my country, the weight of scraps produced by circuit board manufacturers alone reaches more than 400,000 tons every year. Considering the large amount of waste electrical appliances imported each year and the waste circuit boards produced by the dismantling of scrapped electronic products in mainland China, the total amount Will reach more than 1 million tons. Therefore, environmentally friendly and reliable recycling of waste circuit boards can save resources on the one hand and reduce env...

AI Technical Summary

Problems solved by technology

Although the surface can be colored by spraying, this will increase a corresponding spraying process, which will consume more manpower, material resources and time

In addition, for many recycled composite materials, due to the low surface adhesion, suitable coatings are also limited, and often cannot achieve good coloring effects

On the other hand, the mechanical properties of various waste materials added to recycled composite materials have declined, especially the impact strength has deteriorated significantly

These defects have seriously affected the application range of recycled composite materials.

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