Modified acrylic-amino vehicle baking finish, modified acrylic resin and preparation methods thereof

Abstract

The invention relates to a modified acrylic-amino vehicle baking finish which is characterized by comprising the following components in parts by weight: 35-60 parts of modified acrylic resin, 15-25 parts of amino resin, 3-15 parts of sag prevention resin, 20-30 parts of paint, 0.5-2.5 parts of dispersant, 0.3-2.0 parts of flatting agent, 0.1-0.5 part of defoaming agent, 10-20 parts of heavy aromatic, 5-15 parts of butanol and 5-10 parts of DBE, wherein the modified acrylic resin comprises the following components in parts by weight: 10-35 parts of tertiary carboxylic ester, 10-25 parts of dimethylbenzene, 2-10 parts of acrylic acid, 10-40 parts of butyl acrylate, 10-30 parts of hydroxyethyl methacrylate, 10-30 parts of methyl methacrylate, 5-20 parts of styrene, 2.0-5.0 parts of di-tert-amyl superoxide, 0.5-3.0 parts of mercaptoethanol and 10-20 parts of butanol. The modified acrylic-amino vehicle baking finish has the advantages that a new polymerization process is adopted to synthesize modified hydroxylated acrylic resin so as to ensure that the tertiary carboxylic ester modified hydroxylated acrylic resin has shallow color and high ornamentality and has the characteristics of excellent physical and mechanical properties, high solid and low viscosity. A developed E10P modified high-solid vehicle finish product has excellent weather resistance, pollution resistance, acid rain resistance, stone shock resistance and high fullness.

Description

technical field [0001] The invention belongs to chemical coatings, in particular to a high-solid modified acrylic amino automotive baking varnish mainly used for the surface coating of cars, commercial vehicles, mini-cars and new trucks or highly decorative light industrial household appliances. Background technique [0002] There are three kinds of solid color paint systems for medium and high-end automobiles: one is short oil polyester amino system, the other is acrylic amino system; the third is high solid modified acrylic amino system. Compared with acrylic amino car baking varnish, short-oil polyester amino car topcoat has more excellent appearance decoration, but has obvious defects in weather resistance. The color and gloss retention of acrylic resin are excellent, which is also one of the main goals pursued by automotive coatings. However, due to the lack of decorative appearance (such as fullness, vividness, etc.) of the coating film of acrylic amino baking varnish ...

AI Technical Summary

Problems solved by technology

At present, it is still difficult for water-based coatings to meet the quality requirements of automotive topcoats. Powder coatings are also facing new issues such as solving coating thinning, recycling powder recycling, and improving the decorative requirements of automotive topcoats. Therefore, in automotive topcoats On the one hand, it is easier to use high solid modified acrylic resin to make high solid automotive baking paint

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