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Coating composition and method for forming coating film using same

A composition and coating technology, used in electrophoretic coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of insufficient end-face corrosion inhibition and reduced finishing properties, and achieve excellent edge corrosion inhibition, The effect of improving corrosion inhibition

Inactive Publication Date: 2014-03-26
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the electrodeposition coating compositions described in these coating film forming methods, although the gap coating property is improved by increasing the coating film resistance value, the finishing property is lowered.
In addition, the corrosion inhibition of the end face is not sufficient

Method used

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  • Coating composition and method for forming coating film using same
  • Coating composition and method for forming coating film using same
  • Coating composition and method for forming coating film using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] The following examples are given to describe the present invention in more detail. In addition, "part" and "%" mean "part by mass" and "% by mass" unless otherwise indicated.

[0129] Manufacture of Amino-Containing Modified Epoxy Resin (A)

manufacture example 1

[0130] Production example 1 Production example of matrix resin No. 1 (for example)

[0131] 1,000 parts of jER828EL (Note 1), 400 parts of bisphenol A, and 0.2 parts of dimethylbenzylamine were added to the flask, and reacted at 130° C. until the epoxy equivalent reached 750.

[0132] Next, 100 parts of ε-caprolactone and 0.05 part of tetrabutoxytitanium were added, the temperature was raised to 170° C., and the mixture was reacted at 170° C. for 4 hours.

[0133] Next, 100 parts of Placcel 205 (note 2), 140 parts of diethanolamine, and 65 parts of ketimide (purity 84%) obtained by using methyl isobutyl ketone of diethylenetriamine were added to this substance, and at 120 After reacting at °C for 4 hours, 400 parts of ethylene glycol monobutyl ether was added to obtain matrix resin No. 1 with an amine value of 56 and a resin solid content of 80%.

[0134] (Note 1) jER828EL: manufactured by Japan Epoxy Resin Co., Ltd., trade name, epoxy resin, epoxy equivalent 190, number aver...

manufacture example 2

[0136] Production example 2 Production example of base resin No. 2 (for example)

[0137] 1,000 parts of jER828EL (Note 1), 400 parts of bisphenol A, and 0.2 parts of dimethylbenzylamine were added to the flask, and reacted at 130° C. until the epoxy equivalent reached 750.

[0138] Next, 100 parts of ε-caprolactone and 0.05 part of tetrabutoxytitanium were added, the temperature was raised to 170° C., and the mixture was reacted at 170° C. for 4 hours.

[0139] Next, 100 parts of Placcel305 (Note 3), 140 parts of diethanolamine, and 65 parts of ketimide (purity 84%) of diethylenetriamine were added to this substance, and after reacting at 120° C. for 4 hours, ethyl alcohol was added. 400 parts of diol monobutyl ether were used to obtain matrix resin No. 2 with an amine value of 56 and a resin solid content of 80%.

[0140] (Note 3) Placcel305: Daicel Chemical Industries company make, brand name, polycaprolactone polyol compound (corresponds to the compound represented by sai...

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PUM

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Abstract

The present invention addresses the problem of providing a cationic electrodeposition coating having excellent covering power (clearance application properties), edge anticorrosion properties, and finish properties. The present invention provides a cationic electrodeposition coating composition comprising: a specific amino-group-containing epoxy resin (A); blocked polyisocyanate (B) obtained by reacting an active hydrogen-containing component containing propylene glycol, and a polyisocyanate compound; and 0.1-20 mass parts of a cationic electrodepositing gelled microparticulate polymer (C) obtained by crosslinking an acrylic copolymer containing hydrolyzable alkoxysilane groups and cationic groups, per a total of 100 mass parts of the solids fraction of the amino-group-containing epoxy resin (A) and the blocked polyisocyanate compound (B).

Description

technical field [0001] [Cross-reference of related application] [0002] This application claims the priority based on the JP Patent application 2011-154666 specification for which it applied on July 13, 2011 (The entire disclosure is incorporated in this specification as a reference). [0003] The present invention relates to a coating composition and a coating film forming method using the composition. Background technique [0004] Cationic electrodeposition coatings are widely used as primers for conductive metal products such as automobile bodies, which require these properties due to their excellent coating workability and good corrosion inhibition of the formed coating film. However, in recent years, in order to improve the strength of automobile bodies from the perspective of improving collision safety, reinforcing materials are further added to parts obtained by spot welding, so the number of objects to be coated with structures having complex gaps has increased. (...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/44C09D133/14C09D143/04C09D175/04
CPCC08G2150/90C08G18/8012C09D5/443C09D5/4473C08G18/643C09D175/04C09D5/4457C08G18/8019C08G59/4028
Inventor 饗庭健野本健中尾文昭
Owner NISSAN MOTOR CO LTD
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