Cationic electrodeposition coating composition

A cationic electrodeposition and composition technology, used in electrophoretic coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc. Processability and other issues, to achieve the effect of improving the applicability of electrodeposition coating, good thermal fluidity, and excellent finishing.

Inactive Publication Date: 2010-10-27
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] According to the method disclosed in the above-mentioned Patent Document 1 and Patent Document 2, it is not enough to ensure the finishing property of the electrodeposition coating film, especially the finishing property of the electrodeposition coating film with a dry film thickness of 15 μm, and it is not enough to ensure the finishing property of the electrodeposition coating film using the 3C1B method. Finishing property of formed multilayer coating film

Method used

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  • Cationic electrodeposition coating composition
  • Cationic electrodeposition coating composition
  • Cationic electrodeposition coating composition

Examples

Experimental program
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Effect test

preparation example Construction

[0059] Compound (1) can be prepared by adding an alkylene oxide represented by the following general formula (3) to bisphenol A to obtain a hydroxyl-terminated polyether compound, and then reacting the polyether compound with epihalohydrin to carry out bicyclic Oxidation to prepare.

[0060]

[0061] In general formula (3), R 3 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

[0062] Among them, examples of the alkylene oxide represented by the general formula (3) include alkylene oxides having 2 to 8 carbon atoms, such as ethylene oxide, propylene oxide, and butylene oxide.

[0063] Wherein, preferred oxirane (R in general formula (3) 3 is the compound of hydrogen atom), propylene oxide (R in the general formula (3) 3 for methyl compounds).

[0064] Compound (2):

[0065] Moreover, the compound (2) represented by General formula (2) can be used as a diepoxide compound (a11).

[0066]

[0067] In general formula (2), R 2 The same or diff...

Embodiment

[0130] Hereinafter, the present invention will be described in more detail by way of preparation examples, examples and comparative examples, but the present invention is not limited thereto. "Part" in each example shows a mass part, and "%" shows a mass %.

[0131] Preparation of Amino-Containing Modified Epoxy Resin (A)

preparation example 1

[0132] Preparation Example 1 Preparation Example of Base Resin No.1

[0133] Add 162 parts of Glyci-ale PP-300P (Note 1), 1000 parts of jER828EL (Note 3), 440 parts of bisphenol A and 1.6 parts of Tetrabutyl to a 2-liter flask with a thermometer, a reflux condenser and a stirrer. Ammonium bromide was reacted at a temperature of 160° C. until the epoxy equivalent became 800.

[0134] Next, add 430 parts of methyl isobutyl ketone, and then add 130 parts of 2-methylamino-1-ethanol, and make it react for 4 hours at a temperature of 100° C. to obtain a solution of base resin No.1, This base resin No. 1 is an amino group-containing modified epoxy resin with a resin solid content of 80%.

[0135] The ratio of the diepoxy compound (a11) to the constituents of the epoxy resin (A1) is 10% by mass, and the equivalent ratio ([amino group in the amine compound (A2)] / [epoxy group in the epoxy resin (A1) ])=0.9, the amine value of the obtained base resin No.1 was 58 mg KOH / g, and the numbe...

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Abstract

An object of the present invention is to provide a coating composition that has excellent throwing power and electrodeposition coating applicability onto hot dip galvanized steel sheets, and that provides a cationic electrodeposition coating film having a superior finish and excellent anti-corrosion properties, and a multilayer coating film with a superior finish formed on the cationic electrodeposition coating film by a 3C1B process. The present invention provides a cationic electrodeposition coating composition having amino group-containing epoxy resin (A) obtained by reacting epoxy resin (A1) having an epoxy equivalent of 500 to 2,500 with amine compound (A2); and blocked polyisocyanate curing agent (B).

Description

technical field [0001] The present invention relates to cationic electrodeposition paint, its throwing property, applicability of electrodeposition coating on alloyed hot-dip galvanized steel sheet, finishing property of cationic electrodeposition coating film, especially cationic electrodeposition coating film with a dry film thickness of 15 μm It is excellent in finishability and corrosion resistance, and also excellent in finishability of a multilayer coating film formed on the cationic electrodeposition coating film by a 3-coating-1-baking method. Background technique [0002] Cationic electrodeposition coatings are widely used as primers for conductive metal products, such as automobile bodies, because they have excellent coating workability and the formed coating film has good corrosion resistance. However, in recent years, in order to increase the strength of automobile bodies in view of improving the safety of collisions, reinforcements have been added to members wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D7/12C09D5/44
CPCC08G59/184C09D175/04C09D5/4438C08G18/643C08G18/8064C08G59/4042C09D163/00
Inventor 西口滋朗嶋崎昭彦
Owner KANSAI PAINT CO LTD
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