Negative waterborne coating emulsion and production process thereof

Abstract

The invention discloses negative waterborne coating emulsion and a production process thereof, belonging to the technical field of anticorrosive coatings. The emulsion comprises 13-21 parts of epoxy resin, 5-9 parts of methyl ether, 1-1.5 parts of isooctyl alcohol, 1-1.5 parts of diethanol amine and 3-6 parts of polyamine resin by weight and is prepared by carrying out chemical reaction and mixing on the components, then carrying out neutralization with 1.5-3 parts by weight of carboxylic acid and then carrying out dispersion in 38-60 parts by weight of deionized water. The emulsion and the production process have the beneficial effects that the loss is low in the emulsion production process, thus reducing the production cost; the emulsion has high throwing power and good levelling property and ductility; and the production process is high in production efficiency and has the effect of improving the product quality.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a cathode water-based coating emulsion and a production process thereof. Background technique [0002] In cathodic electrophoretic coatings, resin emulsion is the main film-forming substance, which determines the film performance of cathodic electrophoretic coatings, and has always been the focus of people's research and development. At present, the resin emulsion still has the following deficiencies in practical application: [0003] 1. The penetration rate of emulsion electrophoresis is low, the thickness distribution of the electrophoretic coating film is not uniform, and there will be gaps in the paint film on some parts, resulting in poor anti-corrosion effect; [0004] 2. The texture of the emulsion is rough, the leveling and ductility are poor, which affects the quality of the paint film; [0005] 3. In the process of emulsion production, it is easy to pr...

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Problems solved by technology

[0003] 1. The penetration rate of emulsion electrophoresis is low, the thickness distribution of the electrophoretic coating film is not uniform, and there will be gaps in the paint film on some parts, resulting in poor anti-corrosion effect;

[0004] 2. The texture of the emulsion is rough, the leveling and ductility are poor, which affects the quality of the paint film;

[0005] 3. In the process of emulsion production, it is easy to produce shrinkage cavities, which will lead to a decline in product quality, and will also lead to unevenness of the paint film when the paint is used in the later stage;

[0006] 4. In the process of emulsion production, heating and heat preservation are required so that the reaction between the various raw materials can proceed normally, but during the process of heating and heat preservation, the solvent is easy to volatilize, resulting in waste of production raw materials and environmental pollution. loss and inconvenience to the business;

[0007] 5. In the process of emulsion production, the initial reaction temperature is high, and the temperature required for neutralization by adding carboxylic acid in the later stage is low, resulting in low production efficiency, and small particles are prone to appear during the dispersion process

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