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Electrophoresis paint

A technology of electrophoretic coatings and coatings, applied in the direction of electrophoretic coatings, anti-corrosion coatings, coatings, etc., can solve the problems of insufficient corrosion resistance, damage to coating film finishing, coating film stability, etc., and achieve excellent dispersion and coating film Excellent finishing performance and no environmental pollution

Inactive Publication Date: 2005-12-07
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these compounds are relatively cheap, their corrosion resistance is not sufficient. In order to ensure the corrosion resistance of the coating film, when a large amount of the above compounds are contained in the electrophoretic coating, there is also a possibility of impairing the finish of the coating film and the stability of the coating film. The problem

Method used

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  • Electrophoresis paint

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0146] Production Example 1 Rust Inhibitor No.1

[0147] (1) Add 60 parts of magnesium oxide and 1940 parts of water to make 2000 parts into a reaction kettle with a stirring paddle, heat up to 60° C., and prepare dispersion A.

[0148] (2) 178.7 parts of 75% phosphoric acid and 1021.3 parts of water were added to a flask having a stirring blade to obtain 1200 parts of phosphoric acid aqueous solution.

[0149] While stirring the reaction vessel into which the dispersion liquid A was charged, the temperature was kept at 60° C., and after dropping the phosphoric acid aqueous solution uniformly over 30 minutes, it was reacted at 60° C. for 1 hour and 30 minutes.

[0150] (3) Add 217.4 parts of calcium carbonate in another flask with a stirring paddle, add 282.6 parts of water, stir, add 152.6 parts of 67.5% nitric acid therein, and then add 347.4 parts of water to make 1000 parts, and obtain dispersion B.

[0151] (4) Keep the reactor after the reaction in the step (2) at 60° C...

manufacture example 2

[0157] Production Example 2 Rust Inhibitor No.2

[0158] (1) Add 340 parts of calcium carbonate and 4160 parts of water to make 4500 parts in a reaction kettle with a stirring paddle, heat up to 60° C., and prepare dispersion A.

[0159] (2) 490.4 parts of 75% phosphoric acid and 1309.6 parts of water were added to a flask having a stirring paddle to obtain 1800 parts of phosphoric acid aqueous solution.

[0160] The temperature was kept at 60° C. while stirring the reaction vessel in which the dispersion liquid A was charged, and a phosphoric acid aqueous solution was uniformly dropped over 30 minutes, followed by a reaction at 60° C. for 1 hour.

[0161] (3) Add 560 parts of calcium carbonate in another flask with a stirring paddle, add 660 parts of water and stir, add 366 parts of 67.5% nitric acid therein, and then add 414 parts of water to make 2000 parts, and obtain dispersion liquid B.

[0162] (4) The reactor after the reaction in step (2) was kept at 60° C., while st...

manufacture example 7

[0177] Production Example 7 Aliphatic Modified Acrylic Ester

[0178] Linseed oil fatty acid 236 parts

[0179] Glycidyl methacrylate 119 parts

[0180]Hydroquinone 0.4 parts

[0181] Tetraethylammonium bromide 0.2 parts

[0182] Each of the above-mentioned components was put into a reaction container and reacted at a temperature of 140 to 150° C. while stirring. The addition reaction of epoxy group and carboxyl group was followed while measuring the amount of remaining carboxyl groups, and the reaction was stopped after 4 hours to obtain a reactant (1).

[0183] Next, 54 parts of ethylene glycol monobutyl ether was put into the reaction container, and it heated to 120 degreeC. While maintaining the temperature at 120°C, the following monomer mixture was added dropwise over about 2 hours.

[0184] Reactant (1) 30 parts

[0185] Styrene 40 parts

[0186] 15 parts of n-butyl methacrylate

[0187] 8 parts of 2-ethylhexyl methacrylate

[0188] Acrylic 7 parts

[0189] Az...

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Abstract

The present invention provided a pollution-free electrodeposition coating which is excellent in corrosion resistance, finishing property, etc. without containing harmful substances such as a lead compound or a chromium compound. The electrodeposition coating contains at least one silica-modified phosphorus compound chosen from the group consisting of formula (1): (xMHPO43H2O)-(ySiO2)-(mCaSiO3)-(nCaCO3) and formula (2)(Ca3(PO4)23H2O)-(ySiO2)-(mCaSiO3)-(nCaCO3) (wherein M is Mg or Ca; x, y and m are each an integer of 1-3; and n is an integer of 0-3) as a rust preventive agent.

Description

technical field [0001] The present invention relates to a kind of pollution-free electrophoretic paint for forming a coating film which is excellent in corrosion resistance, coating film finish and coating film stability, and does not contain lead compounds and chromium compounds. Background technique [0002] Electrophoretic coatings are widely used in the fields of automobile bodies and auto parts, and electrophoretic coatings with various characteristics have been developed so far. [0003] For example, in addition to the baking paint-type electrophoretic coatings such as the coating of automobile bodies, for the coated objects that have a large heat capacity and cannot sufficiently transmit the heat of the drying oven, or the coated objects that cannot be heated with the addition of plastic or rubber ( For example, industrial machinery such as tractors) is an electrophoretic coating that cures at room temperature. [0004] In the past, lead compounds and chromium compou...

Claims

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Application Information

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IPC IPC(8): C09D5/44
CPCB32B27/18C09D5/08C09D5/44C09D7/61
Inventor 平木忠义池永武史西口滋朗藤田充博
Owner KANSAI PAINT CO LTD
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