Water-based auxiliary material capable of improving application properties of water-based metal and pearl finish and preparation method of water-based auxiliary material

Abstract

The invention relates to a water-based auxiliary material capable of improving application properties of a water-based metal and a pearl finish and a preparation method of the water-based auxiliary material. The water-based auxiliary material comprises the following raw materials in percentages by weight: 10-35% of an aqueous polyurethane emulsion, 1-2.5% of an alkali swelling thickener, 0.2-1% ofan associative thickener, 0.05-0.5% of modified organic bentonite, 0.1-0.4% of an amine neutralizer, 1-5% of n-pentanol and 60-80% of deionized water. The water-based auxiliary material provided by the invention can be used for two continuous spraying of the water-based metal and the pearl finish in the environment with 90% or more of high humidity, and ensures that spraying of the water-based metal and the pearl finish during construction is uniform, has no sagging floating, uniform gloss, no color shading and a fine and smooth surface.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based auxiliary material capable of improving the workability of water-based metal and pearlescent paints and a preparation method thereof. Background technique [0002] Topcoat, also known as finishing paint, is the last layer of paint in multi-layer coating. It should have good resistance to external conditions, and must have the necessary hue and decoration. Layers are protective. Topcoats used outdoors also need to have excellent weather resistance. The decorative effect and weather resistance of the topcoat not only depend on the paint base used, but also have a great relationship with the pigments used and the preparation process. With people's further understanding of the environmental protection, decorative and protective functions of coatings, consumers have put forward higher requirements for decorative styles. Compared with conventional ordinary...

AI Technical Summary

Problems solved by technology

[0003] However, ordinary water-based metallic paints mainly use pearlescent powder as a filler and a large amount of emulsion as a binder. Since the pearlescent powder is in the form of flakes, the specific gravity is about 0.9mg / kl, and the surface tension is relatively high, the pearlescent powder is often suspended on the surface of the emulsion. Cause local accumulation, serious color difference will appear after drying

In addition, the pearlescent powder has a sheet-like structure. After electro-transfer coloring treatment, there will be electrostatic interaction between the sheets, which will be transmitted through water and emulsion carriers. The problem of same-sex repulsion occurs, among which, one end of some pearlescent sheets is warped, unable to be arranged neatly, there is chromatic aberration between yin and yang, the surface is rough, and there is a thorny feeling

Even if you add an anti-static alignment agent, due to the viscosity of the emulsion and the distribution of the alignment agent, the problem of yin and yang color difference cannot be completely solved. In addition, adding too much electrostatic powder to the electrostatic alignment agent will also cover up the color of the gold flakes

To sum up, ordinary water-based metallic paints cannot achieve spraying uniformity during the construction process, and there are problems such as easy to bloom on the surface, uneven gloss, yin and yang, rough surface, and harsh hand feeling.

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