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Water-based metallic basic coating composition

A basic coating and composition technology, applied in the field of water-based metal basic coating compositions, can solve the problems of uneven metal coating, reduce drying time, etc., and achieve the effects of excellent smoothness, excellent sparkle, and excellent physical properties.

Active Publication Date: 2015-09-16
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, although the composition described in Patent Document 4 is excellent in sag resistance and can significantly reduce the drying time, the metal unevenness of the obtained coating film is remarkable, and it is particularly necessary to improve the finish of the blurred coating part.

Method used

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Examples

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Embodiment

[0148] Hereafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples. In addition, "parts" and "%" in the following examples represent "parts by mass" and "% by mass", respectively.

[0149]

manufacture example 1

[0151] Into the reaction vessel, add 115.5 parts of polybutylene adipate with a number average molecular weight of 2000, 115.5 parts of polycaprolactone diol with a number average molecular weight of 2000, 23.2 parts of dimethylol propionic acid, 1,4-butyl 14.5 parts of diol and 120.1 parts of isophorone diisocyanate were reacted at 85° C. for 7 hours in a nitrogen stream with stirring to obtain a prepolymer having an NCO content of 4.0%. Next, the prepolymer was cooled to 50°C, 165 parts of acetone was added and dissolved uniformly, then 15.7 parts of triethylamine was added under stirring, and 600 parts of deionized water was added while keeping the temperature below 50°C, and the obtained water The dispersion was kept at 50°C for 2 hours to complete the water extension reaction, and then the acetone was distilled off under reduced pressure below 70°C, and the pH was adjusted to 8.0 with triethylamine and deionized water, and the acid value of the solid was obtained. A ureth...

manufacture example 2

[0154] 100 parts of deionized water, 2.5 parts of "Newcol 707SF" (manufactured by Nippon Emulsifier Co., Ltd., an anionic emulsifier with a polyoxyethylene chain, solid content of 30%) and a monomer mixture (9 parts of styrene, 1 part of 39 parts of n-butyl acrylate, 40 parts of 2-ethylhexyl acrylate, 10 parts of 2-hydroxyethyl acrylate, 1 part of methacrylic acid, and 1 part of allyl methacrylate), using nitrogen gas flow Stirring and mixing were performed, and 3 parts of 3% ammonium persulfate aqueous solution were added at 60°C. Next, the temperature was raised to 80°C, and a pre-emulsion consisting of the remaining 99 parts of the aforementioned monomer mixture, 2.5 parts of "Newcol707SF", 4 parts of 3% ammonium persulfate, and 100 parts of deionized water was added to the reaction using a quantitative pump for 4 hours. The container was matured for 1 hour after the addition was completed. Thereafter, 33 parts of deionized water were added, adjusted to pH 7.5 by using dim...

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Abstract

The invention provides a water-based metallic basic coating composition suitable for forming a repairing coating, which totally matches with original metallic coating and used metallic coating of vehicle body. A multicomponent water-based metallic basic coating composition and a method for paint repairing employing same are provided. The water-based metallic basic coating composition is formed by combining main agent component I and diluter component II, wherein the main agent component I contains a carbamate resin emulsion A, an acrylic resin emulsion B, luminous pigment C and water, and the diluter component II contains adhesiveness adjusting agent and water. The composition contains silicon dioxide particles D, of which the average particle size ranges from 0.1 to 25.0 micrometers.

Description

technical field [0001] The present invention relates to a water-based metallic base coating composition used for repair coating of an existing metallic coating film on an automobile body or the like. Background technique [0002] It is known that, in metallic base paint compositions containing metallic pigments typified by aluminum pigments, metallic unevenness may occur depending on the state of dispersion of the metallic pigments in the paint, the state of orientation in the coating film, etc. There are also problems such as the inability to achieve the desired metallic luster, and various improvements have been made. [0003] For example, Patent Document 1 discloses a metal base paint composition containing an aluminum flake pigment having an average particle diameter and an average particle diameter thickness within a specific range in a specific amount of a coating film-forming resin. [0004] Patent Document 2 discloses a metallic base paint composition containing a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D133/08C09D5/02C09D7/12
Inventor 平野昌典西泽安明松浦好信市悠太郎
Owner KANSAI PAINT CO LTD
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