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Multilayer Coating Film Formation Method

A multi-layer coating film and coating technology, which is applied in coatings, devices for coating liquid on the surface, primers, etc., can solve problems such as damage to the glossy feeling of the inner panel coating film, and achieve an excellent glossy effect

Active Publication Date: 2022-03-22
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the methods of forming a glossy coating film described in Patent Document 1 and Patent Document 2, especially in the coating of a vehicle body, the appearance of the coating film on the inner panel is affected by the mist of the primer paint for the outer panel. , depending on the type and color of the bright material, there is a problem that the gloss of the inner panel coating film is damaged

Method used

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  • Multilayer Coating Film Formation Method
  • Multilayer Coating Film Formation Method
  • Multilayer Coating Film Formation Method

Examples

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Embodiment

[0078] Hereinafter, an Example and a comparative example are given, and this invention is demonstrated more concretely. However, the present invention is not limited to these Examples. In addition, both "part" and "%" are based on mass.

[0079] Manufacture of acrylic resin emulsion (a)

manufacture example 1

[0081] 128 parts of deionized water, "Adekaliasoup SR-1025" (trade name, manufactured by ADEKA, emulsifier , active ingredient 25%) 2 parts, stirred and mixed in a nitrogen flow, and heated to 80 ° C.

[0082]Next, 1% of the total amount of the monomer emulsion for core parts described below and 5.3 parts of a 6% ammonium persulfate aqueous solution were introduced into the reaction container, and kept at 80° C. for 15 minutes. Then, the remaining part of the monomer emulsion for core part was dripped in the reaction container maintained at the same temperature over 3 hours, and aging was performed for 1 hour after completion|finish of dripping. Next, the following shell monomer emulsion was added dropwise over 1 hour, and after aging for 1 hour, 40 parts of 5% 2-(dimethylamino)ethanol aqueous solution was slowly added to the reaction vessel while cooling to 30°C. , and discharged while filtering through a 100-mesh nylon mesh to obtain an acrylic resin emulsion (a) with an av...

manufacture example 2

[0087] Put 35 parts of propylene glycol monopropyl ether into a reaction vessel equipped with a thermometer, a thermostat, a stirring device, a reflux cooler, a nitrogen introduction pipe and a dropping device, and after raising the temperature to 85°C, add methyl methacrylate dropwise over 4 hours 30 parts of ester, 20 parts of 2-ethylhexyl acrylate, 29 parts of n-butyl acrylate, 15 parts of 2-hydroxyethyl acrylate, 6 parts of acrylic acid, 15 parts of propylene glycol monopropyl ether, and 2,2'-azo A mixture of 2.3 parts of bis(2,4-dimethylvaleronitrile) was aged for 1 hour after the dropwise addition was completed. Then, a mixture of 10 parts of propylene glycol monopropyl ether and 1 part of 2,2'-azobis(2,4-dimethylvaleronitrile) was added dropwise over 1 hour, and aging was carried out for 1 hour after the dropwise addition was completed. Furthermore, 7.4 parts of diethanolamines were added, and the hydroxyl group containing acrylic resin solution (b-1) whose solid conten...

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Abstract

The present invention provides a method for forming a multilayer coating film capable of forming a multilayer coating film excellent in glossiness. The present invention is a method for forming a multilayer coating film, which is a method for forming a multilayer coating film by sequentially coating a first primer paint, a second primer paint, and a clear paint on a substrate by a wet-on-wet process, wherein the first 1. The primer paint is a clear paint or a colored paint. The second primer paint contains a scaly bright pigment. The content of the above-mentioned scaly bright pigment is 10 parts by mass relative to 100 parts by mass of resin solids in the second primer paint. ∼60 parts by mass, and the solid content concentration of the paint is within the range of 5 to 20 mass % with respect to the total mass of the second primer paint, and the film thickness of the coating film formed by the second primer paint is based on the cured The coating film is within the range of 1 to 8 μm.

Description

technical field [0001] The present invention relates to a method for forming a multilayer coating film capable of forming a multilayer coating film excellent in glossiness. Background technique [0002] The painting of a vehicle body is usually carried out by sequentially forming an electrodeposition coating film, an intermediate coating film, and a top coating film on an object to be coated. In the conventional method, generally, after the electrodeposition coating is performed by immersing the object to be coated in the electrodeposition paint, the paint is cured by baking at a high temperature to form an electrodeposition coating film, and then, After coating the intermediate coating paint on the electrodeposition coating film, it is baked to form an intermediate coating film, and then after coating the top coat paint on the intermediate coating film, it is baked to form a top coat. layer coating. [0003] For example, in the case of multi-layer coatings with metallic o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/36B05D5/06B05D7/14C09D7/20C09D201/00
CPCB05D7/14C09D201/00B05D7/577C09D5/36B05D7/572B05D2401/20B05D2502/00B05D2508/00B05D2520/00B05D2601/08C09D7/61C09D7/70C08K2003/2227C08K2003/2241C08K2003/0812C08F220/1802C08F265/06C08K2003/3045C08F220/1804C09D151/003C08G63/123B05D5/068B05D5/066C08F218/08C08F222/385C08F220/14C08F220/20C08F220/06C08F212/08C08F220/1808C08K3/30C08L33/066C08K3/04C08F220/1818C08F230/02C08K3/08C08L43/02C08L67/02B05D5/06C09D5/002C09D5/022C09D133/04
Inventor 大村匡弘殿村浩规
Owner KANSAI PAINT CO LTD
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