A kind of zinc powder-free shop primer and preparation method thereof

Abstract

The invention relates to a zinc powder-free shop primer. The zinc powder-free shop primer comprises a component A and a comment B, wherein the component A comprises epoxy resin with the weight-average molecular weight of 1300-3700, polyvinyl butyral, powder of a compound containing at least two of zinc, phosphorus and iron, pigment and filter, and a solvent in parts by weight; and the component B comprises a curing agent accounting for 2-8wt% of the mass of the component A and a solvent. The zinc powder-free shop primer provided by the invention has the advantages that no lots of zinc overflows in the electric soldering cutting flame operation, and the harm on operators is avoided.

Description

technical field [0001] The invention relates to a shop primer and a preparation method thereof, in particular to a zinc powder-free shop primer and a preparation method thereof, belonging to the technical field of coatings. Background technique [0002] At present, zinc-rich primers are the most common and important as anti-corrosion and shop primers for steel structures. Zinc-rich coatings are mainly used in the form of zinc-rich primers for anti-corrosion of various steel structures. Because the formula contains a large amount of electrochemical anti-rust pigment-zinc powder, it is called zinc-rich coatings. [0003] Zinc-rich paint film is hard, good adhesion, strong anti-rust ability, has excellent three-proof (moisture-proof, anti-salt spray, anti-mildew) performance and anti-oxidation and anti-corrosion performance; excellent cathodic protection and static electricity. There is no adverse effect on welding performance, and it can be used with most coatings. It has bec...

AI Technical Summary

Problems solved by technology

[0008] Since the content of zinc powder in zinc-rich paint (paint) is between 85-95%, it is easy to produce secondary flash rust; the requirements for rust removal of the substrate are high; since zinc powder is an expensive metal mineral, the price starts from 10 yuan / kg soars to more than 30 yuan / kg; for the construction party: the surface treatment of the substrate must be sandblasting and shot blasting to reach the level of mechanical derusting Sa2.5; The upper cover is connected with paint, otherwise there will be secondary flash rust, which has high requirements for rust removal and strict labor protection requirements for personnel; and the price is expensive

[0009] Although inorganic zinc-rich paint has the advantages of fast drying and high temperature resistance, a large amount of zinc will overflow from the paint film of zinc-rich paint when welding and cutting flames, and the steam generated will seriously harm the health of workers. Operators are prone to hot zinc disease

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