Low-temperature cured cathode electrophoretic coating, and preparation method and use method thereof
A cathodic electrophoretic coating, low temperature technology
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Embodiment 1
[0048] Embodiment one: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the mass ratio of the composition of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is 30 parts of main body resin, 10 parts of low Add unblocking curing agent, 1 part of high-boiling point alcohol ether co-solvent, 0.5 part of organic acid and / or inorganic acid into the emulsification disperser in turn, stir and mix evenly, and keep the temperature below 40°C; then add 40 parts of deionized water twice Or put it into the emulsification disperser for more than two times for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, the temperature is raised to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add it, etc. A large amount of deionized water is filtered with a filter to obtain a self-...
Embodiment 2
[0074] Embodiment two: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the composition ratio of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is 40 parts of main body resin, 15 parts of low unblocking Add curing agent, 2 parts of high-boiling point alcohol ether co-solvent, 1 part of organic acid and / or inorganic acid into the emulsification disperser and mix evenly. The temperature is controlled below 40°C; Put it into the emulsification disperser more than once for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, raise the temperature to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add an equal amount of Deionized water, filtered with a filter to obtain a self-emulsifying emulsion with excellent stability. The pH of the cathodic electrophoretic coat...
Embodiment 3
[0097] Embodiment three: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the composition ratio of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is that 35 parts of main body resin, 12 parts of low unblocking Curing agent, 1.5 parts of high-boiling point alcohol ether co-solvent, 0.75 parts of organic acid and / or inorganic acid are sequentially added to the emulsification disperser, stirred and mixed evenly, and the temperature is controlled below 40 ° C; then 45 parts of deionized water Put it into the emulsification disperser more than once for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, raise the temperature to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add an equal amount of Deionized water, filtered with a filter to obtain a self-emulsifying...
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