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Comeon Electric Venture Coatings Composition

A technology of cationic electrodeposition and composition, applied in the direction of electrophoretic coating, epoxy resin coating, coating, etc., can solve the problems of reduced stability of coating composition, UF filter clogging, etc., and achieve good coating stability and corrosion resistance The effect of excellent performance and excellent spreading ability

Active Publication Date: 2015-11-18
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a polyester resin having an acid value of 20 to 80 is used in a cationic electrodeposition coating composition, the stability of the coating composition decreases, thus often causing clogging of the UF filter

Method used

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  • Comeon Electric Venture Coatings Composition
  • Comeon Electric Venture Coatings Composition
  • Comeon Electric Venture Coatings Composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0111] The present invention is explained in detail below with reference to Preparation Examples, Examples, and Comparative Examples; however, the present invention is not limited thereto. In the examples, "part" and "%" are calculated by mass.

[0112] Preparation of polyester resin (A)

preparation example 1

[0113] Preparation Example 1: Preparation Example of Polyester Resin No. 1 Solution

[0114] 252 parts of soybean oil fatty acid, 222 parts of phthalic anhydride, 207 parts of dodecanedioic acid, 164 parts of trimethylolpropane, 240 parts of 1,6-hexanediol and 48 parts of 2- Butyl-2-ethyl-1,3-propanediol was placed in a reactor equipped with heater, stirrer, nitrogen inlet pipe and rectification column. The mixture was gradually heated to 230 °C under dry nitrogen for esterification. The mixture was maintained at 230°C, subjected to an esterification reaction until the acid value reached 2 mgKOH / g, and then cooled to 170°C. Ethylene glycol monobutyl ether was added thereto to obtain a polyester resin solution No. 1 in which the resin solid content was 80% by mass.

[0115] The resin solid content of the polyester resin No. 1 solution had an acid value of 2 mgKOH / g, an oil content of 24% by weight, a hydroxyl value of 80 mgKOH / g, and a number average molecular weight of 1,750...

preparation example 2 to 7 and comparative preparation example 1 to 4

[0117] Polyester Resin Nos. 2 to 11 solutions were obtained in the same manner as Preparation Example 1 except using the formulation shown in Table 1. The formulation and properties are shown below.

[0118] Table 1

[0119]

[0120] Preparation of amino group-containing epoxy resin (B)

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PUM

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Abstract

The invention provides a cation electro-deposition painting composition, which has excellent painting stability and dispension ability and corrosion resistance, and under rigor condition, the corrosion resistance is outstanding; the invention provides coating articles with excellent film property. The invention provides a cation electro-deposition painting composition. The invention contains a polyester resin (A) whose acid valve is 10g KOH / g or lower and number-average molecular weight is not less than 1000 and not more than 7000, and exposy resin (B) contaning amino and block polyisocyanate (C); based on total solid mass of composite (A), (B) and (C), and the existing amount of polyester resin (A) is 3 mass percent to 40 mass percent, and the existing amount of exposy resin (B) contaning amino is 20-60 mass pencent, and the existing amount of block polyisocyanate is 10-40 mass pencent.

Description

technical field [0001] The present invention relates to a cationic electrodeposition coating composition, which has good coating stability, excellent spreading ability and excellent corrosion resistance of coating film. Background technique [0002] The cationic electrodeposition coating composition is easy to apply and forms a coating film with high corrosion resistance. It is therefore widely used as an undercoat for conductive metal products such as automobile bodies requiring such properties. [0003] Hitherto, in an effort to improve crash safety, automobile bodies have been reinforced and reinforcing materials have been further added to electric welding elements. Accordingly, the number of painted objects structurally including complicated pocket portions, gap portions, and the like has significantly increased. Such a structure reduces the current density (mA / cm 2 ), making it difficult to deposit a coating film. Therefore, pocket portions, gap portions, etc. may n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D175/06C09D5/44C08G18/42
Inventor 饭岛英基伊藤圭
Owner KANSAI PAINT CO LTD
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