High-conductivity weldable pre-coating primer based on conductive composite material and preparing method thereof

Abstract

The invention relates to the field of coatings, and provides high-conductivity weldable pre-coating primer based on a conductive composite material and a preparing method thereof. The problem that when a pre-coating primer coating of a pre-coating primer product in the prior art is not removed, electric resistance welding and plasma welding functions cannot be achieved is solved. The high-conductivity weldable pre-coating primer is composed of a first component and a second component, wherein the first component is prepared from, by weight, 2-10 parts of epoxy resin, 10-15 parts of a solvent,0.1-1 part of a dispersing agent, 50-90 parts of metallic conductive powder, 0.01-1 part of nonmetallic conductive powder, 1-3 parts of a rheological additive, 0.1-1 part of an antifoaming agent and 0.5-1 part of an adhesion promoter, and the second component is prepared from, by weight, 30-80 parts of a polyamine curing agent and 20-70 parts of a solvent.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a highly conductive weldable precoat primer based on conductive composite materials and a preparation method thereof. Background technique [0002] Engineering vehicles, mechanical equipment, ships, carbon steel passenger cars and trucks are processed and manufactured with a large number of steel profiles and plates. If the corroded material is welded and then surface treated, it will be more difficult, especially in areas with complex structures and narrow spaces, as well as thin plate parts. For example, thin plates are easily deformed by spraying, and rusted areas in narrow spaces and complex structure corners cannot The problem of effective rust removal is very obvious. Therefore, the process is generally to spray the required steel materials to remove scale and pollutants, and to apply temporary protective primer or pre-coated primer; Cutting and welding are required; weld seams and...

AI Technical Summary

Problems solved by technology

[0004] Therefore, for the above content, the present invention provides a kind of highly conductive weldable precoat primer based on conductive composite material and its preparation method, which solves the problem when the precoat primer product of the prior art does not remove the precoat primer coating. The problem that the functions of resistance welding and plasma welding cannot be realized