Water-based acrylic polyurethane paint and preparation method thereof

Abstract

The invention discloses a water-based acrylic polyurethane paint and a preparation method thereof. The water-based acrylic polyurethane paint is prepared from a component A and a component B, wherein the component B is a curing agent; and the component A is prepared from the following components in percentage by weight: 35%-45% of water-based acrylic emulsion, 0.5%-1.2% of a wetting dispersant, 0.1%-0.5% of a defoaming agent, 10%-20% of a pigment, 10%-18% of talc powder, 10%-18% of barium sulfate, 0.3%-0.8% of a flatting agent, 0.1%-0.5% of a rheological aid and 10%-15% of deionized water. The system is low in solvent content and VOC content, and a paint film is rapidly dried and good in rubbing property.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based acrylic polyurethane intermediate coating and a preparation method thereof. Background technique [0002] China has become the world's largest auto market, accounting for 25% of the global market, of which passenger cars account for as high as 30% of the global market. Automobiles, construction machinery, and rail transit are important components of GDP and have become the engine of China's economy, which brings huge business opportunities to the automotive coatings industry. The market for automotive coatings and coatings is huge, and it also brings enormous pressure to the environment. "Environmental protection" has always been a hot spot that has attracted much attention from the industry. Water-based coatings have been recognized and promoted by various industries in recent years due to their environmental protection characteristics. At present, automotive ...

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Problems solved by technology

[0004] Chinese patent CN103289549A discloses a green and environmentally friendly water-based two-component polyurethane modified intermediate coating and its preparation method. The water resistance and solvent resistance of the paint film are excellent, but due to the high viscosity of the curing agent, the construction is difficult, and it still needs to be diluted with a solvent. Increase the VOC content in the paint, which has an impact on the environment and the human body

[0005] Chinese patent CN102250541A discloses a water-based intermediate paint, which uses water-based hydroxyacrylic acid dispersion as the main resin. Compared with water-based hydroxyacrylic acid emulsion, the system contains a certain amount of organic solvent, and the drying speed of the coating film is slow. The curing agent is also used Dilution with organic solvents increases the VOC content and also affects the drying speed of the coating film

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