Water-based epoxy hybrid acrylic self-crosslinking quick-drying coating used in high humidity environment and preparation method thereof

Abstract

The invention discloses a water-based epoxy hybrid acrylic self-crosslinking quick-drying coating used in a high-humidity environment and a preparation method thereof. The water-based epoxy hybrid acrylic self-crosslinking quick-drying coating includes: by weight, 45-60 parts of water-based epoxy hybrid acrylic emulsion, 12-27 parts of deionized water, 0.5-0.8 parts of wetting and dispersing agent, defoaming 0.05-0.1 parts of additives, 0.3-0.5 parts of ammonia water, 0.5-0.8 parts of rheological additives, 5-20 parts of nano fillers, 5-20 parts of weather-resistant pigments and 0.3-0.5 parts of hydrophilic fumed silica. The water-based epoxy hybrid acrylic self-crosslinking quick-drying paint of the present invention has the characteristics of fast drying in a high-humidity environment of more than 90%, and can be surface-dried in 3 to 4 hours, which is more than 50% faster than the surface-drying time of the existing paint. It is suitable for wet and rusty low-treatment surface construction, and the paint film has better initial water resistance, chemical corrosion resistance, mechanics and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of water-based anticorrosion coatings, in particular to a water-based epoxy hybrid acrylic self-crosslinking quick-drying coating used in a high-humidity environment and a preparation method thereof. Background technique [0002] Water-based paint has been vigorously advocated by the state in recent years, and it is a substitute for solvent-based paint. It uses water as a solvent, which can greatly reduce VOC emissions while maintaining product quality, and has the characteristics of energy saving, environmental protection, non-flammable, non-explosive, and healthy. In order to promote "oil to water", my country has also continuously introduced relevant policies. [0003] However, the southeast coastal areas of my country mainly belong to the tropical-subtropical monsoon climate area. The summer is hot and rainy (the same period of rain and heat), the weather is hot and humid, and the humidity is as high as...

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Problems solved by technology

[0003] However, the southeast coastal areas of my country mainly belong to the tropical-subtropical monsoon climate area. In summer, it is hot and rainy (the same period of rain and heat), the weather is hot and humid, and the humidity is as high as 90%. However, the existing water-based industrial coatings are affected by high humidity environmental factors. It cannot be dried for a long time, which seriously restricts the promotion and application of water-based industrial coatings in this area

[0004] The impact of high humidity on the paint film is mainly manifested in the following aspects: ①The paint film is not easy to dry and easy to hang; ②The quality of the film is poor, and it cannot form a continuous coating film, which greatly reduces the mechanical and chemical properties; ③The paint film White, poor adhesion, easy to peel off between layers

[0005] From the analysis of the film-forming mechanism of the film-forming substances of water-based industrial coatings: the film-forming of the emulsion must be water volatilization, the water is not volatile, the emulsion cannot form a film, and the water volatilization rate is controlled by the relative humidity of the environment, which also determines the existing water-based coatings. Industrial coatings cannot meet the construction needs of the region

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