Silver-plated copper powder electrically-conducting paint and method of manufacturing the same

Abstract

The invention relates to a silvering copper powder electro-conductive coating and the preparation method, which belongs to the chemical technology field. The silvering copper powder electro-conductive coating of the invention utilizes the mixed metal as a conductive agent and comprises the following components based on the weight per cent: 18 per cent to 32 per cent of silvering copper powders with grain size of 10Mum, 25 per cent to 35 per cent of copper powders with grain size of 10Mum, 8 per cent to 23 per cent of flake silver powders with grain size of 0.1Mum to 10Mum, 840s10 per cent to 25 per cent of bisphenol A epoxy resins, 10 per cent to 25 per cent of curing agent 2-ethyl-4-methyl-imidazole, 5 per cent to 25 per cent of coupling agent KH-560 and others are water. The silvering copper powder electro-conductive coating prepared by the invention has surface resistivity of 100 Omega cm to 102 Omega cm. The coating has good conductivity and functions of shielding the electromagnetic wave and absorbing, and has broad application prospect in such fields as electronic industry, aviation / aerospace, electric heating, electromagnetic shielding and building warming.

Description

technical field [0001] The invention relates to a silver-plated copper powder conductive coating and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] Metal-polymer conductive composite materials include conductive adhesives, conductive rubber, conductive coatings, etc., and other functional composite materials have been widely used in various fields of modern society, such as conductive connections of integrated circuit components, electromagnetic shielding interference, and aircraft invisible materials , conductive or antistatic coatings, etc. The conductive filler is mainly metal powder or fiber, and the conductivity is generally 103-105S.cm -1 . Among them, the expensive price of gold powder limits its wide application; silver powder or silver paste is a kind of conductive filler widely used now, which has good electrical and thermal conductivity, but silver is prone to migration and short circuit under t...

AI Technical Summary

Problems solved by technology

Among them, the expensive price of gold powder limits its wide application; silver powder or silver paste is a kind of conductive filler widely used now, which has good electrical and thermal conductivity, but silver is prone to migration and short circuit under the action of DC bias, which greatly Reduce the safety factor of the application; because copper is easily oxidized in the air to form an insulating oxide film, the practical degree is very low