High-hardness and quick-drying water-based two-component filling clear primer and preparation method thereof

Abstract

The invention provides a high-hardness and quick-drying water-based two-component filling clear primer. The high-hardness and quick-drying water-based two-component filling clear primer comprises a component A and a component B which are uniformly mixed according to an equivalent ratio of n (-NCO) to n (-OH) of 1.5-1.8, wherein the component A is prepared from the following components in percentage by weight: 75.0 to 80.0 percent of water-based acrylic emulsion; 0.8%-1.0% of an antifoaming agent, 4.0%-6.0% of a coalescing agent, 3.0%-6.0% of filling powder, 0.2%-0.3% of a wetting leveling agent, 0.4%-0.6% of an anti-settling agent, 0.1%-0.5% of a thickener, 2.0%-5.0% of a polishing agent and 2.0%-10.0% of water. And the component B is prepared from the following components in percentage byweight: 30%-40% of modified IPDI polyisocyanate and 60%-70% of modified HDI polyisocyanate. The -OH in the primer emulsion component and -NCO in the curing agent component are subjected to a deep cross-linking reaction to generate a urethane bond, the coating film is compact, and the hardness of the paint film is improved. In addition, the minimum film forming temperature MFFT is larger than or equal to 30 DEG C, the high drying speed is provided for a product system, and the requirement for changing oil into water in solid wood paint can be met; the invention also provides a preparation method of the water-based two-component filling clear primer.

Description

technical field [0001] The invention relates to the technical field of paint production, in particular to a high-hardness, fast-drying water-based two-component filling clear primer and a preparation method thereof. Background technique [0002] As the country's environmental protection requirements for the paint chemical industry are getting higher and higher, the use of oil-based paints has been banned in many provinces and cities. Water-based paints are favored in the market due to low pollution, low VOC emissions and even no VOC emissions. [0003] While the household industry and the paint chemical industry are carrying out a comprehensive "oil-to-water" transformation, the technical challenges of water-based paint are also increasing. In the solid wood furniture industry, the substrates are mostly multi-duct wood such as rubber wood and walnut, and the craftsmanship is mostly fully enclosed and transparent. The traditional oil-based paint technology used before has b...

AI Technical Summary

Problems solved by technology

This water-based two-component bright white paint has high crosslinking density and high hardness, but the white paint is a top coat, and its full sealing effect needs to be verified

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