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Bicomponent automobile cathode electrophoresis paint and preparation method thereof

A cathodic electrophoretic coating, two-component technology, applied in electrophoretic coatings, coatings, devices for coating liquids on the surface, etc., to achieve the effects of good water resistance, excellent weather resistance and high hardness

Active Publication Date: 2008-04-16
GUANGDONG YATU CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these coatings is a two-component automotive cathodic electrophoretic coating prepared by mixing epoxy grafted acrylate / epoxy-amine resin in a certain mass ratio as a film-forming base material, and there is no method using acrylic acid Epoxy grafted acrylate resin is prepared from a functional monomer that integrates ester monomer structure and epoxy resin structure and can act as a hydrophilic function and a coupling agent

Method used

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  • Bicomponent automobile cathode electrophoresis paint and preparation method thereof
  • Bicomponent automobile cathode electrophoresis paint and preparation method thereof
  • Bicomponent automobile cathode electrophoresis paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 70g of epoxy resin, 30g of n-butanol and 15g of propylene glycol methyl ether mixed solvent 45g in a 1000ml four-necked round bottom flask equipped with a condensing reflux tube, agitator and temperature-controlled oil bath heating device, and slowly heat up under stirring To 110°C, under the protection of nitrogen, mix 30g of mixed monomers of methyl methacrylate 10.50g, butyl acrylate 6g, styrene 5g, acrylamide 2.50g and glycidyl methacrylate 6g, and peroxidize Dissolve 0.84g of dibenzoyl in the mixed monomer, drop it into the reaction system at a rate of 1 drop / s at a stirring speed of 250 rpm, and add di A solution of 0.21 g of benzoyl and 5 g of n-butanol was heated to 115° C. for 4 hours to obtain a graft copolymer solution. Cool the obtained graft copolymer solution to 90°C, gradually increase the stirring speed to 500 rpm as the viscosity of the reaction system increases, add 20g of diethanolamine dropwise, and raise the temperature to 100°C for 2 hours afte...

Embodiment 2

[0067] Add 75g of epoxy resin, 30g of n-butanol and 15g of propylene glycol methyl ether mixed solvent 45g in a 1000ml four-necked round bottom flask equipped with a condensing reflux tube, agitator and temperature-controlled oil bath heating device, and slowly heat up under stirring To 110°C, under the protection of nitrogen, mix 25g of mixed monomers including 8g of methyl methacrylate, 5g of butyl acrylate, 5g of styrene, 2g of acrylamide and 5g of glycidyl methacrylate, and diphenyl peroxide Dissolve 0.90 g of formyl in the mixed monomer, add dropwise to the reaction system at a rate of 1 drop / s at a stirring speed of 250 rpm, and add diphenyl peroxide after the dropwise addition is completed within 2 hours A solution of 0.225 g of n-butanol and 5 g of n-butanol was heated to 115° C. for 4 hours to prepare a graft copolymer solution. Cool the obtained graft copolymer solution to 90 °C, gradually increase the stirring speed to 500 rpm with the increase of the viscosity of t...

Embodiment 3

[0072]In a 1000ml four-neck round bottom flask equipped with a condensing reflux tube, a stirrer and a temperature-controlled oil bath heating device, add 45g of a mixed solvent of 80g of epoxy resin, 30g of n-butanol and 15g of propylene glycol methyl ether, and slowly heat up under stirring To 110°C, under the protection of nitrogen, mix 20g of the mixed monomers of methyl methacrylate 6.50g, butyl acrylate 4g, styrene 4g, acrylamide 1.50g and glycidyl methacrylate 4g, and peroxidize Dissolve 0.96g of dibenzoyl in the mixed monomer, drop it into the reaction system at a rate of 1 drop / s at a stirring speed of 250 rpm, and add di A solution of 0.24 g of benzoyl and 5 g of n-butanol was heated to 115° C. for 4 hours to obtain a graft copolymer solution. Cool the obtained graft copolymer solution to 90 °C, gradually increase the stirring speed to 500 rpm with the increase of the viscosity of the reaction system, add 25 g of diethanolamine dropwise, and raise the temperature to ...

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Abstract

The invention relates to a bicomponent automobile cathode cataphoresis (BAC) coating and the preparation method thereof. The bicomponent cathode cataphoresis coating consists of epoxy resin grafted with acrylate (component I) and epoxy-amine resin (component II). The BAC paint film provided by the invention not only has the advantages of excellent corrosion resisting property, great adhesive force, good water resistance and high hardness, which are owned by a paint film formed by the single component II, but also has the advantages of excellent weathering resistance, good shock resistance, high fullness and brightness, which are owned by a paint film formed by the single component I. Thus, the paint film provided by the invention, which has better performance than that of single-component paint films is particularly suitable as automobile cathode cataphoresis coating and is also suitable as cathode cataphoresis coating of any work piece with complex forms.

Description

technical field [0001] The invention relates to the field of polymer material science and engineering, in particular, the invention relates to a kind of automotive cathodic electrophoretic coating and its preparation, that is, epoxy grafted acrylate resin prepared by solution graft copolymerization method and used The epoxy-amine resin prepared by the solution amination method is mixed according to a certain ratio as the film-forming base material, and the electrophoretic coating is prepared by adding additives, pigments and fillers. After electrophoretic coating and curing, the automobile with excellent performance can be obtained. Primer coating. Background technique [0002] The development of electrophoretic coatings originated in the 1930s. The early development mainly focused on anodic electrophoretic coatings, so the synthesis and coating process of anodic electrophoretic coatings are relatively mature and have a long history, and industrialization has been realized ...

Claims

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Application Information

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IPC IPC(8): C09D151/08C09D5/44B05D7/14
Inventor 王炼石温翠珠张安强冯兆均冯兆华阮伟明
Owner GUANGDONG YATU CHEM
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