Preparation method and application of high-efficiency dispersing agent for water-based automobile coating

Abstract

The invention provides a preparation method and application of a high-efficiency dispersing agent for a water-based automobile coating. Compared with the prior art, according to special construction requirements of current water-based automobile surface new material, based on anchoring principle of high-molecular compound to high-pigment pigment, the efficient dispersing agent with plurality of anchoring ends and organic ends is designed and synthesized through controllable free radical polymerization. The efficient dispersing agent for the water-based automobile coating is applied to the water-based automobile coating, the prepared water-based environment-friendly high-performance high-pigment automobile coating has excellent pigment wetting dispersity, high dispersing capacity, good stability, high efficiency and energy conservation, a formed paint film is high in gloss and good in fullness, the leveling property and the appearance value of the paint film are effectively improved; and the defects such as pinholes and bubbles are effectively reduced, the operability is high, and the paint film has the advantages of no toxicity, difficulty in combustion, no environmental pollution,safety, reliability and the like.

Description

【Technical field】 [0001] The invention relates to the field of water-based automotive coatings, in particular to a preparation method and application of a high-efficiency dispersant for water-based automotive coatings. 【Background technique】 [0002] With the continuous improvement of people's living standards and the rapid development of the automobile industry, my country has become the largest automobile production and sales country in the world. The huge automobile production and sales market will surely drive the rapid development of automobile coatings and the sharp increase in the amount of automobile coatings. Although the huge number of automobiles provides a large development space for automotive coatings, the current domestic automotive coatings market, especially the automotive repair market, is still dominated by solvent-based systems, which contain a large amount of volatile organic compounds. During production and use, not only It is harmful to the human body ...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the automobile industry, there are currently countless cars of various brands on the market, so the space for users to choose products is increasing day by day, while the market competition is becoming more intense. In addition to brand and performance, it has gradually turned its attention to the color and appearance of the product. Decoration is also an important factor. Pigment is one of the indispensable main components in automotive coatings. It has very good color and decoration, high chroma, high coloring Intensive color development is more important in various coatings, especially high-end automotive coatings. Pigments with high pigmentation and high tinting strength seldom exist in the form of single particles, but are usually aggregates formed by multiple basic particles through strong chemical bonds. The secondary reversible structural agglomerates are formed between the pigments through the van der Waals force. However, the pigment agglomerates have large particles, which are difficult to disperse evenly in the coating to the nanometer or sub-nanometer level, and are prone to flocculation.

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