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Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material

A technology of polyurethane acrylate and cathodic electrophoretic coatings, which is applied in the direction of polyurea/polyurethane coatings, electrophoretic coatings, electrolytic coatings, etc., which can solve the problems of high baking temperature, low temperature baking resistance, and poor stability of coatings, and achieve paint film Fullness, good chemical resistance, high adhesion effect

Inactive Publication Date: 2017-05-10
东莞市霖辉金属表面处理材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyurethane acrylate cathodic electrophoretic coating and its preparation method and application, aiming to solve the problem that the existing electrophoretic resin emulsion has poor stability, is easy to hydrolyze, and the baking temperature of the coating is high, which limits its decorative properties. Electroplating, aluminum castings, etc. are not resistant to high temperature baking

Method used

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  • Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material
  • Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material
  • Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material

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preparation example Construction

[0033] Such as figure 1 Shown, the preparation method of the polyurethane acrylate cathodic electrophoresis resin of the embodiment of the present invention comprises the following steps:

[0034] S101: Synthesis of intermediate products: Add the liquid isocyanate, polyester polyol compound and catalyst in the stated ratio into the reaction device, and mix evenly. Raise the temperature to 90-100°C for mixed reaction, and continue the reaction at constant temperature for 3h-4h to generate intermediate products;

[0035] S102: The intermediate product is further reacted with the amine compound to extend the chain: under the condition of 60°C-90°C, add the calculated amount of the amine compound dropwise to the device containing the product of step S101 within 1 hour, and continue the reaction at a constant temperature after the dropwise addition is completed 2h~4h;

[0036] S103: Preparation of UV curable resin: under the condition of 70°C to 80°C, add the stated proportion of...

Embodiment 1

[0045] Prepare raw materials according to the mass percentage of the total materials:

[0046] Component mass percentage (wt.%)

[0047] Isophorone diisocyanate (IPDI) 22%, N-methyldiethanolamine 8.2%, polycarbonate diol 22%, polycaprolactone diol 8%, polycaprolactone triol 3%, lactic acid 2.5% , organic bismuth catalyst (Bicat8118) 0.1%, propylene glycol methyl ether 9%, pentaerythritol triacrylate 12.7%, methacrylate-β-hydroxyethyl 8.5%, photoinitiator 4%, leveling agent 0.03%

[0048] In a reactor equipped with reflux, heating and stirring devices, add the polyisocyanate, polyester polyol compound and catalyst in said proportion into the reaction device, and mix evenly. Raise the temperature to 90°C-100°C for mixed reaction, continue the reaction at constant temperature for 3h-4h, and generate intermediate products; lower the temperature appropriately, and add the calculated amount of amine compounds dropwise to the device containing the intermediate product within 1h unde...

Embodiment 2

[0056] Prepare raw materials according to the mass percentage of the total material: component mass percentage (wt.%)

[0057] Diethanolamine 1%, N,N-dimethylethanolamine 2%, N-methyldiethanolamine 2%, isophorone diisocyanate (IPDI) 11%, polyethylene glycol oxalate diol 13%, Polycaprolactone triol 7%, glacial acetic acid 3.9%, triphenylphosphine 0.6%, ethylene glycol methyl ether 8%, acetone 25%, pentaerythritol triacrylate 10%, methacrylate-β-hydroxyethyl ester 8.5% %, hydroxyethyl methacrylate phosphate 4%, photoinitiator 4%, leveling agent 0.03%

[0058] In a reactor equipped with reflux, heating and stirring devices, add the polyisocyanate, polyester polyol compound and catalyst in said proportion into the reaction device, and mix evenly. Raise the temperature to 90°C-100°C for mixed reaction, continue the reaction at constant temperature for 3h-4h, and generate intermediate products; lower the temperature appropriately, and add the calculated amount of amine compounds dr...

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Abstract

The invention discloses a polyurethane-acrylate cathodic electrophoretic coating material, a preparation method therefor and an application of the polyurethane-acrylate cathodic electrophoretic coating material. The coating material is prepared from the ingredients in percentage by mass: 8% to 17% of amine compound, 10% to 40% of polyisocyanate, 7% to 36% of polyester polyol compound, 0.1% to 0.6% of catalyst, 9.5% to 38% of hydroxyl-terminated vinyl compound, 2% to 7% of organic acid, 2% to 6% of photoinitiator and 0.01% to 1% of leveling agent. According to the method disclosed by the invention, the preparation process is simple, polyurethane acrylate resin further has a good emulsifying property, the cathodic electrophoretic emulsion coating material prepared from the resin has the characteristic of convenience in construction, and a coating film is low in moisture content, is insoluble in water, is free of sagging, is free of dripping and is free of a stripping phenomenon after the electrophoretic coating material is subjected to electrophoresis. According to the electrophoretic coating material disclosed by the invention, the coating film is very uniform and plump and is high in adhesive power, good in leveling property and good in chemical resistance, and the ornamental performance and corrosion resistance are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, in particular to a polyurethane acrylate cathodic electrophoretic coating and its preparation method and application. Background technique [0002] Electrophoretic coatings are environmentally friendly water-based coatings. It uses water as a solvent to avoid the harm to the environment caused by the volatilization of organic solvents; and the uniform coating is not affected by the shape of the object to be coated, so it has been widely used. However, the anodic electrophoretic coating affects the appearance and corrosion resistance of the paint film due to the easy oxidation of the anodic during the coating process. The successful development of cathodic electrophoretic coatings overcomes the shortcomings of easy oxidation of anodic electrophoretic coatings. Ultraviolet (UV) curing induces rapid polymerization and crosslinking of chemically active liquid materials by ultraviolet ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/44C08G18/66C08G18/32C08G18/42C08G18/44C08G18/67C25D13/06
CPCC08G18/3275C08G18/4202C08G18/4238C08G18/4277C08G18/44C08G18/672C08G18/673C09D5/4465C09D175/06C25D13/04C08G18/6655
Inventor 谢辉杜硕彭朝晖刘娅莉
Owner 东莞市霖辉金属表面处理材料有限公司
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