Water-based quick-drying low-VOC alkyd coating and preparation method thereof

Abstract

The invention discloses a water-based quick-drying low-VOC alkyd coating and a preparation method thereof. The water-based quick-drying low-VOC alkyd coating is prepared from the following raw materials in parts by weight: 50-80 parts of an alkyd resin aqueous dispersion, 0.05-0.1 part of a defoaming agent, 0.3-0.5 part of a dispersing agent, 10-25 parts of pigment, 10-25 parts of precipitated barium sulfate, 20-50 parts of deionized water, 0.3-1.5 parts of a rheological agent, 0.3-0.5 part of a drier, 0.05-0.2 part of an anti-skinning agent, 0.1-0.5 part of an anti-flash rust agent and 0.3-0.7 part of an anti-settling agent. The alkyd resin aqueous dispersion is prepared from quick-drying alkyd resin, deionized water and an amine neutralizer, wherein the mass ratio of the quick-drying alkyd resin to the deionized water is 3: 1-3.75: 1. According to the water-based quick-drying low-VOC alkyd coating, the VOC content is lower than 100 g / L; the self-dispersion method and the salt forming method are combined, and a certain self-dispersion group is introduced into the resin system so that the compactness of the paint film and the water resistance and the stability of the product are improved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a water-based quick-drying low-VOC alkyd coating and a preparation method thereof. Background technique [0002] Alkyd resin has developed rapidly since its development in 1927. Due to its outstanding construction performance and certain decorative and protective properties, alkyd resin coatings have become a very widely used coating today. However, traditional alkyd resin coatings are solvent-based coatings, which use a large amount of organic solvents and eventually volatilize into the atmosphere, which is not only a great waste of resources, but also causes varying degrees of harm to the environment and human body. In recent years, with the upsurge of environmental protection all over the world, various environmental protection laws have been promulgated one after another, and it is imperative to replace solvent-based alkyd coatings with water-based low-VOC alkyd coatings. [0003] Mo...

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Problems solved by technology

However, the water-based paint produced by this method affects the compactness of the paint film due to the introduction of the emulsifier, which greatly reduces the water resistance and anti-corrosion ability of the paint, and the aging resistance performance is greatly reduced. The pollution of the ecological environment by the degradation-like estrogen has been confirmed by the scientific community. Advanced countries in Europe and the United States have successively legislated to restrict the variety and use of emulsifiers. In recent years, the coating industry in my country has also been discussing legislation to restrict

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