Water-based modified acrylic anti-corrosive coating and preparation method thereof

Abstract

The invention discloses a water-based modified acrylic anti-corrosive coating and a preparation method thereof. The water-based modified acrylic anti-corrosive coating is prepared from the following raw materials in parts by weight: 250-400 parts of a core-shell structure acrylic emulsion, 100-250 parts of a soap-free acrylic emulsion, 30-150 parts of pigment, 100-300 parts of filler, 0-50 parts of color paste, 3-10 parts of a dispersing agent, 1-3 parts of a wetting gent, 1-3 parts of a defoaming agent, 5-15 parts of propylene glycol, 0.5-5 parts of multifunctional auxiliaries, 1-3 parts of amildew preservative, 1-3 parts of a preservative, 10-15 parts of a coalescing agent, 5-10 parts of a thickening agent, 1-2 parts of a neutralizer, 1-5 parts of a flatting agent, 5-15 parts of a flasherosion inhibitory agent, 150-200 parts of softened water. The coating disclosed by the invention is low in VOC content, free from benzene series, incombustible, low in smell and low in pollution; the construction can be performed by adopting brush-coating, roll-coating, airless spraying and like methods, the thick spraying is feasible, the drying is fast and the use is safe and convenient. The paint film is high in mechanical strength, strong in adhesive force and good in corrosion resistance.

Description

technical field [0001] The invention belongs to the field of water-based anti-corrosion coatings, in particular to a water-based modified acrylic anti-corrosion coating for container underframes and a preparation method thereof. Background technique [0002] Underframe paint is widely used in container manufacturing for container underframe protection. Traditional underframe paints are generally solvent-based paints, which cause serious environmental pollution and are prone to accidents such as fire and poisoning during construction. In 2017, the Container Industry Association promoted water-based coatings nationwide, so major domestic container manufacturers have an urgent need for environmentally friendly water-based underframe paints. [0003] Traditional underframe paints are mostly solvent-based asphalt paints, which are prepared with petroleum asphalt as the base material, fillers, No. 200 paint solvents, and additives. With its excellent performance and low price, i...

AI Technical Summary

Problems solved by technology

Chinese patent application 201611142412.4 discloses a water-based asphalt coating for containers and its processing technology, aiming to solve the problem of poor bonding effect of water-based asphalt coatings for traditional containers; the key points of the technical solution include the following components: 8-12 parts of asphalt, 1.5-2.5 parts of stone powder, 1-2 parts of zinc phosphate, 10-18 parts of epoxy resin, 2-6 parts of alkyd resin, 1-4 parts of sodium methylcellulose, 1-2 parts of anionic emulsifier

[0005] Most of the existing water-based underframe paint base materials are asphalt emulsion as the main base material, which has the problems of coarse latex particles, poor stability, and easy to block the gun during construction

Due to the large content of emulsifiers, and the use of thickeners such as cellulose or bentonite, they tend to foam on the surface of water-based epoxy zinc-rich primers in humid environments; some are modified with epoxy resins, and have poor storage stability. , low-temperature brittleness; some have better resistance to salt spray, but contain heavy metal substances that are harmful to the environment

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