Graphene conductive powder coating before wooden product coating as well as preparation and application thereof

Abstract

The invention provides a graphene conductive powder coating before wooden product coating as well as preparation and application thereof. The conductive powder coating is composed of the following components: epoxy resin, graphene, a dispersing agent, a filler, a silane coupling agent, a coupling agent of organic titanate, a flatting agent, a curing agent, an antifoaming agent and the like. The conductive powder coating can be applied to conductive treatment before wooden product coating, and the wooden product is treated and dried and cured to form a flat and dense conductive coating on the surface. The conductive powder coating is capable of closing pores on the surface of the wooden product base material and does not diffuse and permeate on the surface, so that the conductivity performance on the surface of the base material is improved, the electrostatic spraying coating quality of the wooden product is improved, phenomena such as pinholes, bubbles and cracking occurring in the coating flatting and curing process are avoided, and the adhesive force between the wooden product base material and the coating is promoted. The graphene conductive powder coating is excellent in hardness and resistance, is capable of improving the durability of the wooden products and can be widely applied to coating treatment industries of the wooden products.

Description

technical field [0001] The invention relates to an electrostatic spraying treatment technology for wood products, in particular to graphene conductive powder coatings before wood products are painted and their preparation and application. technical background [0002] Powder-coated wood products have been shown to be durable even in extreme environments such as high humidity and heat (e.g. powder-coated MDF boards limit formaldehyde release), in addition to being stain and moisture resistant, not peeling or delaminating Features. Powder coating is an upgraded alternative to traditional coating applications. Since both natural wood and artificial boards are poor conductors of electricity, they need to be treated before spraying to obtain good electrical conductivity (generally, the surface resistance is 10 4 ~10 9 Ohm), which enables it to quickly absorb charged paint. The main methods for obtaining electrical conductivity on the surface of wood product substrates are pre...

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Problems solved by technology

The preheating method is to heat the wood product to evaporate the internal moisture to the surface, so that the surface becomes conductive and obtains electrostatic adsorption capacity. However, when the coating is cured, the internal moisture and other volatiles continue to develop in gaseous form when heated, which is easy to cause Coating leveling, bubbles, cracks and other phenomena during curing, and the preheating method cannot be well adapted to the collinear spraying production of various specifications of wood products, because it can obtain surface conductivity without destroying the balance of its moisture content , which brings difficulty to the preheating process control and easily induces product coating quality problems; spraying conductive liquid (agent) or conductive paint can improve the surface conductivity of wood product substrates, and realize electrostatic adsorption at room temperature. The surface of the wood product is rough, and there are a large number of fine voids and pits. Due to its own characteristics, the conductive liquid cannot completely seal the pores of the wood product base material. Moreover, this kind of liquid treatment method is easy to penetrate on the surface of the wood product, which brings certain treatment problems.

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