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Method for forming multilayer film

A multi-layer coating film and coating film technology, applied in chemical instruments and methods, devices for coating liquid on surfaces, coatings, etc., can solve the problems of increased number of coating processes, complicated operations, and increased costs

Inactive Publication Date: 2016-09-14
นิปปอน เพนท์ ออโตโมทีฟ โคทติ้งส์ โค แอลทีดี
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a coating film design has the following problems: the increase in the number of coating steps complicates the operation and increases the cost

Method used

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  • Method for forming multilayer film
  • Method for forming multilayer film
  • Method for forming multilayer film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0225]

[0226] In a reaction vessel for producing a common acrylic resin emulsion equipped with a stirrer, a thermometer, a dropping funnel, a reflux cooler, and a nitrogen introduction pipe, 445 parts of water and NEWCOL 293 (an emulsifier manufactured by Japan Emulsifier Co., Ltd., trade name ) 5 parts, while stirring, the temperature was raised to 75°C. Using a homogenizer, the monomer mixture (methyl methacrylate 7.8%, butyl acrylate 54.2%, styrene 10.0%, 4-hydroxybutyl acrylate 20.6%, methacrylic acid 1.6%, ethyl acrylate 6.0%), A mixture of 240 parts of water and 30 parts of NEWCOL 293 was emulsified, and this monomer pre-emulsion was dropped into the above-mentioned reaction container over 3 hours while stirring. In parallel with the dropping of the monomer pre-emulsion, an aqueous solution obtained by dissolving 1 part of APS (ammonium persulfate) as a polymerization initiator in 50 parts of water was evenly added dropwise to the above-mentioned reaction vessel unti...

manufacture example 2

[0227]

[0228] Aqueous sodium hydroxide solution was added to a reaction vessel containing 128.2 g (4.0 moles) of methanol and 74.1 g (1.0 moles) of n-butanol, and after adjusting the pH to 11.8, paraformaldehyde (92% CH 2 O) 169.7 g (5.2 mol). After heating at 60° C. for 20 minutes and dissolving paraformaldehyde in methanol, 126.1 g (1.0 mol) of melamine was added, and pH was adjusted to 13.0 with an aqueous sodium hydroxide solution. The reaction was carried out for 1 hour while distilling methanol out of the system at reflux temperature, and then concentrated under normal pressure until the internal temperature became 110°C. Next, 320.4 g (10.0 mol) of methanol and 741.2 g (10.0 mol) of n-butanol were added, and the pH was adjusted to 2.0 with sulfuric acid, followed by reaction at 30° C. for 3.5 hours. Then, the pH was adjusted to 9.2 with aqueous sodium hydroxide solution. The neutralized salt was filtered out, and the filtrate was concentrated under reduced pressur...

manufacture example 3

[0229]

[0230] The hydroxyl-containing acrylic resin emulsion of Production Example 1, the melamine resin of Production Example 2, and the bright pigments shown in Table 1 (film aluminum 11-2069, film aluminum 11-2068, aluminum bright pigment Alpaste manufactured by Toyo Aluminum Co., Ltd. 01-0651, bright pigment MH-8801 manufactured by Asahi Kasei) and coloring pigments (RedP2GL, TM8270Red, CR-97Titan, R-5000Black) were formulated according to the contents shown in Table 1. Then, the intermediate coating materials of paint numbers 1 to 14 shown in Table 1 were obtained by uniform dispersion. In addition, "thin film aluminum 11-2069" in Table 1 is "Alumi Paste 11-2069" manufactured by Toyo Aluminum Co., Ltd., "thin film aluminum 11-2068" is "Alumi Paste 11-2068" manufactured by Toyo Aluminum Co., Ltd., "Toyo Aluminum 01-0651" is "Alumi Paste 01-0651" manufactured by Toyo Aluminum Corporation, "Asahi Kasei MH-8801" is "Alumi Paste MH-8801" manufactured by Asahi Kasei Corpora...

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Abstract

A method for forming a multilayer film (1) has an intermediate coat application step for forming an uncured intermediate coating film (12) by applying an intermediate coat containing a photoluminescent pigment (120) directly on top of an electrodeposited coating film (11) formed on an object to be coated, a base coat application step for forming an uncured base coating film (13) by applying a base coat containing a colored pigment on the uncured intermediate coating film (12), a clear coat application step for forming an uncured clear coating film (14) by applying a clear coat on the uncured base coating film (13), and a baking step for simultaneously baking and curing the uncured intermediate coating film (12), uncured base coating film (13), and uncured clear coating film (14). The photoluminescent pigment (120) in the intermediate coat is a thin-film shape having a volume-average particle diameter (D50) of 5-20 [mu]m and an average thickness of 0.01-0.3 [mu]m.

Description

technical field [0001] The present invention relates to a method for forming a multilayer coating film. Specifically, it relates to a method for forming a multilayer coating film having a sense of depth. Background technique [0002] Conventionally, it is known that a plurality of coating films having various functions are laminated and formed on the surface of a base material such as an automobile outer panel. These multiple coating films protect the base material while imparting high designability, thereby greatly contributing to the improvement of the appearance of automobiles and thus to arousing consumers' desire to purchase. [0003] In addition, in recent years, development of a multilayer coating film having a sense of depth has been carried out for applications such as automobile exterior panels. For example, a technique has been proposed in which metallic paint (A), colored paint (B) and clear paint (C) are sequentially applied, and a multilayer coating film cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/06B05D1/36B32B27/20C09D7/61
CPCB05D5/06C09D5/00C08K3/04C09D7/70B05D7/572C09D7/61B05D2350/65B05D2301/00B05D2202/10B05D2502/00
Inventor 藤原真一
Owner นิปปอน เพนท์ ออโตโมทีฟ โคทติ้งส์ โค แอลทีดี
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