Cationic electro-deposition coating

A cationic electrodeposition and coating technology, applied in electrophoretic coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of not showing good applicability, the substrate adhesion and weather resistance of the coating film need to be further improved, etc. Achieve the effects of excellent electrodeposition coating adaptability, excellent substrate adhesion, and high wet film resistance

Inactive Publication Date: 2017-01-11
HAOLISEN COATING SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the above-mentioned patent documents are limited to the coating adaptability of alloyed hot-dip galvanized steel sheets, and do not show good applicability to other materials, especially die-cast aluminum materials, magnesium-aluminum alloys, etc., and the substrate of the coating film Adhesion and weather resistance need to be further improved

Method used

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Examples

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preparation example Construction

[0031] 1. Preparation of amino-modified novolac epoxy resin

[0032] components Dosage (g) Novolak epoxy resin (EEW=165-175) 218 Epoxy resin (EEW=180-190) 2180 Bisphenol A 860 cardanol 156.2 Bisphenol A polyoxyethylene ether 1 460 methyl isobutyl ketone 100 Dimethylbenzylamine 3 methyl isobutyl ketone 400 N-Methylethanolamine 189.4 ketimine 2 231.2 Ketimine modified polyamide 3 420 Ethylene glycol monobutyl ether 250 total 5467.8

[0033] 1-bisphenol A polyoxyethylene ether: hydroxyl value = 220-230mgKOH / g, Mn = 480-550.

[0034] 2-Ketimine: It is produced by the reaction of diethylenetriamine and propiophenone. The solid content of the final product is 70%, and the amine value is 335-360mgKOH / g.

[0035] 3-Ketimine modified polyamide: American Air Sunmide 3155, amine value 230-270mgKOH / g.

[0036] In a reaction flask equipped with a thermometer, a stirrer and a reflux condenser, sequ...

Embodiment 2

[0047] 1. Preparation of amino-modified novolac epoxy resin

[0048] components Dosage (g) O-Cresol Novolak Epoxy Resin (EEW=200-210) 264 Epoxy resin (EEW=180-190) 2180 Bisphenol A 860 cardanol 156.2 Bisphenol A polyoxyethylene ether 1 460 methyl isobutyl ketone 100 Dimethylbenzylamine 3 methyl isobutyl ketone 400 N-Methylethanolamine 189.4 ketimine 2 231.2 Ketimine modified polyamide 3 420 Ethylene glycol monobutyl ether 250 total 5513.8

[0049] 1-bisphenol A polyoxyethylene ether: hydroxyl value = 220-230mgKOH / g, Mn = 480-550.

[0050] 2-Ketimine: It is produced by the reaction of diethylenetriamine and propiophenone. The solid content of the final product is 70%, and the amine value is 335-360mgKOH / g.

[0051] 3-Ketimine modified polyamide: American Air Sunmide 3155, amine value 230-270mgKOH / g.

[0052] In a reaction flask equipped with a thermometer, a stirrer and a reflux conden...

Embodiment 3

[0064] 1. Silicone / oleic acid modified epoxy flexible resin

[0065]

[0066]

[0067] 1-Epoxy reactive diluent: polypropylene glycol diglycidyl ether manufactured by DOW Company, EEW=290-300, total chlorine content<2000ppm.

[0068] 2-Ketimine: prepared by reacting diethylenetriamine and methyl isobutyl ketone, the solid content of the final product is 70%, and the amine value is 450-480mgKOH / g.

[0069] 3-Ketimine modified polyamide: American Air Sunmide 3155, amine value 230-270mgKOH / g.

[0070] 4-Organosilicon coupling agent: epoxy functional group silane KH560.

[0071] In the reaction flask equipped with a thermometer, agitator and reflux condenser, add the epoxy reactive diluent and bisphenol A in the prescribed amount in sequence. After the addition is complete, start stirring to raise the temperature of the reaction system to 100°C and then add dimethylimidazole After adding the catalyst, first raise the temperature to 170°C to react for 35 minutes and then me...

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Abstract

The invention relates to a cationic electro-deposition coating. The cationic electro-deposition coating comprises, by weight, 45-80% of amino modified phenolic epoxy resin a, 15-40% of blocked isocyanate curing agents b and 5-20% of organic silicon/oleic acid modified epoxy resin c with hydrolysable siloxane groups. Hard segment components of the coating are provided by the amino modified phenolic epoxy resin, and soft segment components are provided by the organic silicon/oleic acid modified epoxy resin. The cationic electro-deposition coating has the advantages that the cationic electro-deposition coating is excellent in electro-deposition coating adaptability when applied to metal base materials (die casting aluminum materials, magnesium-aluminum alloy and galvanized steel plates in particular) and is excellent in corrosion resistance, base material adhesion and flexibility and good in weather resistance, and finished products are excellent in appearance.

Description

[0001] [technical field] [0002] This invention relates to cationic electrodeposition coatings. [0003] [Background technique] [0004] Due to its excellent coating workability, cationic electrodeposition coating can uniformly coat various parts of metal workpieces with complex shapes and structures, and the formed coating film has good physical and chemical properties, so it is widely used in automobiles, tricycles, machinery, etc. , hardware and other industries are widely used. [0005] In recent years, the products coated with cationic electrodeposition coatings have been continuously diversified, and the types of product materials are also increasing, such as: cold-rolled / hot-rolled steel sheets, cast iron, die-cast aluminum, tin-plated steel sheets, galvanized steel sheets, magnesium Aluminum alloy, copper-plated pipe, etc., and more and more metal workpieces are no longer composed of a single metal material, and the materials used in different parts of the workpiece m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/44C09D5/08
CPCC09D163/00C09D5/08C09D5/4438
Inventor 郭辉刘薇薇陈豪杰唐志文方娟娟朱婷婷田静丽
Owner HAOLISEN COATING SHANGHAI
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