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Aqueous binder composition for metal surface treatment agents

A metal surface treatment, water-based adhesive technology, applied in the direction of metal material coating process, coating, primer, etc., can solve the problems of insufficient liquid stability and electrical conductivity, and achieve excellent liquid stability and tight adhesion. Excellent properties and conductivity, coatability and liquid stability

Inactive Publication Date: 2014-07-23
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this composition has problems of insufficient liquid stability and conductivity
[0008] The surface treating agent of the prior art as described above does not satisfy all of the following requirements: it is excellent in applicability and liquid stability, forms a film with excellent corrosion resistance, adhesion, and electrical conductivity, and does not contain chromate; There are still problems when used for practical use

Method used

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  • Aqueous binder composition for metal surface treatment agents
  • Aqueous binder composition for metal surface treatment agents
  • Aqueous binder composition for metal surface treatment agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] 57 parts of N-2-(aminoethyl)-3-aminopropyltrimethoxysilane was added to a separable flask equipped with a reflux condenser, a thermometer and a stirrer, and γ- 61 parts of glycidoxypropyl trimethoxysilane. Exothermic heat was generated due to the dropwise addition, but the temperature was kept at 40°C or lower. After the dropwise addition was completed, the mixture was aged with stirring, naturally cooled for 1 hour, and then heated and reacted at 80°C for 5 hours. From the results of 1H-NMR measurement, it was confirmed that no epoxy group remained in the content after the reaction. Next, 28 parts of acetic acid and 1000 parts of deionized water were added and stirred for 30 minutes to dissolve the contents after the reaction, thereby obtaining an aqueous solution of a silane reaction product (A'). The neutralization equivalent of the silane reaction product (A') with acetic acid was 0.9.

[0161] To the aqueous solution of the silane reaction product (A'), 6 parts o...

Embodiment 2

[0164] In a separable flask equipped with a reflux condenser, a thermometer, and a stirrer, 1,000 parts of deionized water was added, and N-2-(aminoethyl)-3-aminopropyltrimethoxysilane was slowly added while cooling with an ice bath. 57 parts to dissolve. Next, 12 parts of acetic acid was added to the contents, 61 parts of γ-glycidyloxypropyltrimethoxysilane was added, stirred for 30 minutes to dissolve, and then heated and reacted at 80° C. for 5 hours to obtain a silane reaction product (A') aqueous solution. From the 1H-NMR measurement result, it was confirmed that no epoxy group remained in the silane reaction product (A'). The neutralization equivalent of the silane reaction product (A') with acetic acid was 0.4.

[0165] Next, 6 parts of an 89% phosphoric acid aqueous solution was mixed with the aqueous solution of the silane reaction product (A'), stirred for 30 minutes, and dissolved by adding 250 parts of deionized water, followed by distillation under reduced press...

Embodiment 3

[0168] In a separable flask equipped with a reflux condenser, a thermometer and a stirrer, 1,000 parts of deionized water and 19 parts of acetic acid were added, and 61 parts of γ-glycidoxypropyltrimethoxysilane was slowly added while stirring, and the mixture was stirred for 10 minutes. to dissolve. Next, 57 parts of N-2-(aminoethyl)-3-aminopropyltrimethoxysilane was slowly added thereto, stirred for 30 minutes to dissolve, and then heated and reacted at 80° C. for 5 hours to obtain a silane reaction Aqueous liquid of product (A'). From the 1H-NMR measurement result, it was confirmed that no epoxy group remained in the silane reaction product (A'). The neutralization equivalent of the silane reaction product (A') with acetic acid was 0.6.

[0169] To the aqueous solution of the silane reaction product (A') was mixed 6 parts of an 89% phosphoric acid aqueous solution, stirred for 30 minutes, added 250 parts of deionized water to dissolve it, and concentrated by distillation ...

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Abstract

The present invention provides an aqueous binder composition for chromate-free metal surface treatment agents that have excellent coatability and liquid stability and are capable of forming a surface treatment film having excellent corrosion resistance, adhesiveness and electrical conductivity. This aqueous binder composition for metal surface treatment agents contains: a reaction product of a silane coupling agent containing an amino group and a silane coupling agent containing an epoxy group, or a reaction product of the above-described silane coupling agents and an alkoxysilane compound such as trialkoxysilane wherein a hydrocarbon group such as an alkyl group is directly bonded to a silicon atom; a specific acid compound; and water.

Description

technical field [0001] The present invention relates to an aqueous binder for a metal surface treatment agent capable of forming a surface treatment film, which is suitable for treating the surface of a metal substrate, is excellent in coatability and storage stability, and is excellent in corrosion resistance, adhesion and electrical conductivity. A composition; a metal surface treatment agent containing the aqueous adhesive composition; a surface treatment method of a metal material using the metal surface treatment agent; and a method for producing the above-mentioned aqueous adhesive composition. Background technique [0002] In general, as a technique that is excellent in adhesion to the surface of a metal material and can impart corrosion resistance to the surface of a metal material, a method is known in which a method containing chromic acid, dichromic acid, or their salts as a main component of the surface of the metal material is used. A method of chromate treatmen...

Claims

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Application Information

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IPC IPC(8): C23C22/06C09D5/02C09D7/12C09D183/08C23C22/07C23C22/60C23C22/68C23C22/74
CPCC09D5/002C08G77/26C09D5/08C09D183/08C23C22/68C23C2222/20
Inventor 永井彰典木村友哉宇留岛秀人
Owner KANSAI PAINT CO LTD
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