Polymer emulsion for waterborne metal anticorrosive coating and preparation method of polymer emulsion

Abstract

The invention relates to a polymer emulsion for a waterborne metal anticorrosive coating and a preparation method of the polymer emulsion. The polymer emulsion consists of the following raw materials in percentage by mass: 13.0-18.0% of drying oleic acid modified prepolymerized intermediates, 16.0-20.0% of acrylic monomers, 2.0-3.0% of functional monomers containing keto carbonyl groups, 2.5-5.0% of modified acrylic monomers, 1.5-2.5% of reactive emulsifier, 0.2-0.3% of initiator, 0.8-1.0% of compounds containing hydrazine groups, 0.5-1.5% of waterborne drier, 0.5-1.2% of volatile alkali and the balance deionized water. A soap-free emulsion polymerization process is adopted in the invention, the condensation of the keto carbonyl groups and the hydrazine groups and the oxidation polymerization, crosslinking and solidification reaction of double unsaturated bonds are generated in the filming process through introducing the keto carbonyl groups and the double unsaturated bonds on a molecular chain of waterborne polymer emulsion, so that a coating has the functions such as favorable saline water resistance, solvent resistance, rust prevention and the like.

Description

technical field [0001] The invention relates to a polymer emulsion for water-based metal anticorrosion coatings and a preparation method thereof, belonging to the technical field of emulsions. Background technique [0002] With the rapid development of global industrialization, environmental pollution has become increasingly serious. In recent years, in order to cope with global warming, countries around the world have introduced environmental protection policies and regulations to limit the discharge of pollutants. In this context, the water-based research of various solvent-based anti-corrosion coatings for metal anti-corrosion has been paid more and more attention by people, trying to prepare environmentally friendly anti-corrosion coatings with performance comparable to solvent-based metal anti-corrosion coatings by using water as the dispersion medium. Type anti-corrosion coatings, not only save oil resources, but also avoid the pollution of volatile organic compounds t...

AI Technical Summary

Problems solved by technology

[0006] The emulsifiers used above are all non-reactive emulsifiers. This means that the non-reactive emulsifiers are easy to migrate and adsorb on the interface to cause foam, which makes the coating film appear void and incomplete, resulting in the final coating being water-resistant and resistant. Poor salt spray

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