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Multi-component water-based primer coating composition and coating method

A water-based primer, multi-component technology, used 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 resistance. Excellent effect

Active Publication Date: 2021-08-31
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, when using a repair coating composition to carry out repair coating, compared with the coating film of the unrepaired part, the repair The adhesion of the coating film on the part, especially the water-resistant adhesion and finishing (shishang り) may sometimes become insufficient

Method used

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  • Multi-component water-based primer coating composition and coating method
  • Multi-component water-based primer coating composition and coating method
  • Multi-component water-based primer coating composition and coating method

Examples

Experimental program
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Effect test

manufacture example 1

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

[0160] Equipped with a stirrer, a thermometer, a 2-liter glass reactor vessel condenser, were added 300 parts of deionized water, 1 part of sodium dodecylbenzenesulfonate, the air inside was replaced with nitrogen, and then stirring improved to an internal temperature of 82 deg.] C and melted. To another vessel, was added 320 parts of deionized water, 40 parts of sodium dodecylbenzenesulfonate, 2 parts of ammonium persulfate, stirring sufficiently, thereto was added 136 parts of styrene containing, 120 parts of methyl methacrylate , 168 parts of isobutyl methacrylate, 152 parts of n-butyl methacrylate, methacrylic acid, 192 parts of 2-hydroxyethyl methacrylate and 32 parts of acrylic monomer mixture, stirring to prepare an emulsion, the spending 4 hours emulsion was continuously added dropwise to the prior reaction vessel.

[0161] After the addition, further stirring at 82 ℃ 2 hours, cooled to 40 ℃,...

manufacture example 2

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

[0163]Equipped with a stirrer, a thermometer, a 2-liter glass reactor vessel condenser, were added 300 parts of deionized water, 1 part of sodium dodecylbenzenesulfonate, the air inside was replaced with nitrogen, and then stirring improved to an internal temperature of 82 deg.] C and melted. To the other vessel, 320 parts of deionized water, 20 parts of sodium dodecylbenzenesulfonate, 1 part of ammonium persulfate, stirring sufficiently, thereto was added 120 parts of styrene containing, 120 parts of methyl methacrylate, 120 parts of isobutyl methacrylate, 120 parts of n-butyl methacrylate, methacrylic acid, 152 parts of 2-hydroxyethyl methacrylate, glycidyl methacrylate, 8 parts of a monomer mixture, stirring to prepare an emulsion, spending the two hours before the emulsion was continuously added dropwise to the reaction vessel.

[0164] After the completion of dropwise addition, aging at the ...

manufacture example 6

[0170] (Production Example 6) Production of curing agent component

[0171] Adding the isocyanate group content of 21% commercially available polyisocyanate compound No.1 (100% solids) 68 parts of 3-glycidoxypropyl trimethoxy silane coupling agent of silane No.1 2 and parts of dipropylene glycol dimethyl ether (water-soluble solvent having no hydroxyl group) 30 parts, stirred for 30 minutes to produce a 70% solids of the curing agent (B-1).

[0172] (Production Examples 7 to 14) for producing a curing agent component

[0173] In Production Example 6, as shown in Table 2 is set as a polyisocyanate compound, the kind and amount of the silane coupling agent, except the same manner as in Production Example 6, to obtain a curing agent (B-2) ~ (B- 9). The formulated Examples 6 to 14 shown in Table 2.

[0174] 【Table 2】

[0175]

[0176] Table polyisocyanate compound Nos. 1 to 3, and * refers to a 1 to 3.

[0177] Polyisocyanate compound No.1: (hexamethylene diisocyanate-based compound...

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Abstract

The present invention provides a multi-component water-based primer coating composition and a coating method, which can form a coating primer with excellent adhesion, especially water-resistant adhesion. A multi-component water-based primer coating composition, which is a multi-component water-based primer coating composition comprising 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 in the range of 30 to 70° C., and a curing agent component (II) containing isocyanate groups The polyisocyanate compound (C) with a content rate of 10% by mass or more, the main ingredient (I) and / or the curing agent (II) component contains a silane coupling agent (D), and the content of the aforementioned (D) component is based on the curing agent component ( The mass of II) is based on the range of 0.01 to 10 mass%.

Description

Technical field [0001] The present invention relates to a multi-component useful as a surface layer of the early art of automotive repair lacquer aqueous primer coating composition, the aqueous multi-component primer coating composition can form a particularly adhesion of water-resistant adhesion excellent coating film. Background technique [0002] Conventionally, with regard to automotive refinish primer coating (the first layer and the surface finish) of the field, from the viewpoint of the emphasis on the fast-drying properties, adhesion, water resistance, workability and other abrasive, an organic solvent-based acrylic lacquer coating, double urethane coating formulation is mainstream. But in recent years, from the viewpoint of environmental conservation, we are promoting the transition from organic solvent-based to water-based paint, various automotive refinishing paint with water-based primer. For example, Patent Document 1 discloses a surface of the first layer two-part h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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