A kind of water-based conductive paint and preparation method thereof

Abstract

The invention discloses a water-based conductive coating, which is characterized in that the water-based conductive coating includes the following components in weight percent: 2% to 5% of sodium-based bentonite, modified attapulgite / nano-carbon powder composite conductive powder Material 15-20%, emulsifier 3-5%, binder 1-3%, dispersant 2-6%, coupling agent 2-5%, deionized water 55.5-70%, defoamer 0.1-0.5 %. The invention also discloses a preparation method of the water-based conductive paint. The preparation process is simple, the stability is good, and the industrialized production is easy to realize. Moreover, the prepared water-based conductive coating has good stability, and it still has a suspension of 98.8% after being placed for 7 days, which is beneficial to the uniform coating of the coating on the metal surface.

Description

technical field [0001] The invention relates to a water-based conductive paint and a preparation method thereof. Background technique [0002] Conductive coating has the properties of eliminating static electricity and electromagnetic shielding. It is composed of film-forming substances, conductive fillers, solvents and additives. It has broad application prospects in the fields of conductive coating on the inner wall of oil tanks, electronic components and circuit board printing, and electromagnetic wave shielding. [0003] Conductive coatings are mainly divided into additive conductive coatings and non-additive conductive coatings, among which additive conductive coatings dominate. At present, the conductive fillers commonly used in additive-type conductive coatings mainly include metal-based powders, carbon-based powders, metal oxide-based powders and composite conductive powders. For example, JP64-30103A discloses a preparation method of a conductive coating using metal...

AI Technical Summary

Problems solved by technology

For example, JP64-30103A discloses a preparation method of a conductive coating using metal powder as a conductive filler. Although the metal powder has excellent electrical conductivity, except for silver powder, powders such as aluminum and copper are easily oxidized and have poor corrosion resistance. Higher, in addition, metal powder is generally large in proportion and easy to sink to the bottom and agglomerate, so the dispersibility is not good; CN1060858A discloses a kind of preparation method of conductive coating with carbon black or graphite as conductive filler, although the conductivity of carbon-based conductive powder is higher Good, the stability is also good, but it is difficult to disperse evenly, and the application of conductive coatings is greatly limited; CN102174284B authorizes a production method for preparing conductive coatings with polyaniline / attapulgite clay as conductive fillers, and the composite conductive fillers Excellent electrical conductivity and low cost, but as a conductive filler, polyaniline has poor dispersibility, is easy to agglomerate, and is prone to flocculation after being placed. Although the good viscosity and thixotropy of attapulgite clay can increase the stability of the coating and plasticity, but the cohesion of the two substances is poor, and the uniformity of the coating is poor; CN103077765A discloses a composite conductive material, which is prepared by surface adsorption of organic compounds with attapulgite clay powder and nano carbon powder, the composite material Although it can improve the hydrophilicity, because its structure is still a layer chain structure of attapulgite, the stability is still poor when preparing water-based coatings

Images