Multi-component aqueous primer coating composition and a coating method thereof

A water-based primer and multi-component technology, applied in primers, polyurea/polyurethane coatings, coatings, etc., can solve the problems of insufficient adhesion, water resistance, adhesion, and finishing, and achieve good finishing and water-resistant adhesion excellent effect

Active Publication Date: 2018-11-02
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for example, when repairing the outer panels of automobiles, etc., sometimes the partially exposed primer (steel plate) part due to grinding is painted; There is primer coating on the surface to be coated such as primer etc. which is partially exposed in this way, and then

Method used

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  • Multi-component aqueous primer coating composition and a coating method thereof
  • Multi-component aqueous primer coating composition and a coating method thereof
  • Multi-component aqueous primer coating composition and a coating method thereof

Examples

Experimental program
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Effect test

manufacture example 1

[0159] (Production Example 1) Production of hydroxyl-containing acrylic resin

[0160] Add 300 parts of deionized water and 1 part of sodium dodecylbenzenesulfonate to a 2-liter glass reaction vessel equipped with a stirrer, a thermometer, and a condenser, replace the air inside with nitrogen, and raise the temperature while stirring. It melts at an internal temperature of 82°C. In another container, add 320 parts of deionized water, 40 parts of sodium dodecylbenzenesulfonate, and 2 parts of ammonium persulfate, stir well, and add 136 parts of styrene and 120 parts of methyl methacrylate to it. , a monomer mixture of 168 parts of isobutyl methacrylate, 152 parts of n-butyl methacrylate, 192 parts of 2-hydroxyethyl methacrylate and 32 parts of acrylic acid was stirred to make an emulsion, and it took 4 hours to mix the The emulsion was continuously added dropwise to the previous reaction vessel.

[0161] After completion of the dropwise addition, it was further stirred at 82°...

manufacture example 2

[0162] (Production example 2) Production of hydroxyl-containing acrylic resin

[0163]Add 300 parts of deionized water and 1 part of sodium dodecylbenzenesulfonate to a 2-liter glass reaction vessel equipped with a stirrer, a thermometer, and a condenser, replace the air inside with nitrogen, and raise the temperature while stirring. It melts at an internal temperature of 82°C. Add 320 parts of deionized water, 20 parts of sodium dodecylbenzenesulfonate, and 1 part of ammonium persulfate to another container, stir well, add 120 parts of styrene, 120 parts of methyl methacrylate, A monomer mixture of 120 parts of isobutyl methacrylate, 120 parts of n-butyl methacrylate, 152 parts of 2-hydroxyethyl methacrylate, and 8 parts of glycidyl methacrylate is stirred to make an emulsion. This emulsion was continuously added dropwise to the previous reaction container for 2 hours.

[0164] After the dropwise addition, after aging at the same temperature for 30 minutes, add 160 parts of...

manufacture example 6

[0170] (Manufacture example 6) Manufacture of curing agent component

[0171] Add 68 parts of commercially available polyisocyanate compound No.1 (solid content 100%) with an isocyanate group content rate of 21%, and 3-glycidoxypropyltrimethoxysilane 2 as silane coupling agent No.1. part and 30 parts of dipropylene glycol dimethyl ether (a water-soluble solvent not having a hydroxyl group), and stirred for 30 minutes to prepare a curing agent (B-1) with a solid content of 70%.

[0172] (Production Examples 7 to 14) Production of curing agent components

[0173] In Production Example 6, the types and amounts of the polyisocyanate compound and the silane coupling agent were set as in Table 2, except that, in the same manner as in Production Example 6, curing agents (B-2) to (B-2) were obtained. 9). Table 2 shows the formulations of Production Examples 6-14.

[0174] 【Table 2】

[0175]

[0176] Polyisocyanate compound No.1-3 and *1-3 in a table|surface mean the following. ...

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Abstract

The present invention provides a multi-component aqueous primer coating composition and a coating method thereof which can form a coating film primer which is excellent in adhesion, particularly water-resistant adhesion. The multi-component aqueous primer coating composition which is a multi-component aqueous primer coating composition comprises a main component (I) and a curing agent component (II), wherein the main component (I) a hydroxyl group-containing acrylic resin (A) and a pigment (B) having a hydroxyl value in the range of 15 to 180 mgKOH/g and a glass transition temperature of 30 to70 DEG C, and the curing agent component (II) contains the polyisocyanate compound (C) having a content of 10% by mass or more of an isocyanate group, the main component (I) and/or the curing agent (II) component contains a silane coupling agent (D), and the content of the component (D) is a curing agent component (the mass of II) is in the range of 0.01 to 10% by mass.

Description

technical field [0001] The present invention relates to a multi-component water-based primer coating composition that can be used as a primary surface paint in the field of automobile repair, and the multi-component water-based primer coating composition can form adhesion, especially water-resistant adhesion Excellent coating film. Background technique [0002] Conventionally, regarding primer coatings (primary coatings) in the automotive repair field, organic solvent-based acrylic lacquer coatings, Two-component urethane coatings are the mainstream. However, in recent years, from the viewpoint of environmental preservation, the conversion from organic solvent-based paints to water-based paints has been promoted, and various water-based primer paints for automotive repairs have been proposed. For example, in Patent Document 1, an epoxy / amine-based two-component water-based primary surface paint is disclosed; in Patent Document 2, an epoxy-based single-component water-based...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C09D7/20
CPCC09D175/04C09D5/002C09D7/20C09D7/61C08K2003/3045C08K2003/265C08K3/26C08K3/346C08K3/34C08K3/30C08K3/36
Inventor 堀雅司境博之藤田裕介
Owner KANSAI PAINT CO LTD
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