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Metallic pigment and coating material containing same

A technology of metallic pigments and covering layers, applied in the direction of multi-color effect coatings, coatings, fibrous fillers, etc., can solve the problems of not having corrosion resistance, not being able to obtain width, hindering the effect of improving the brightness of surface modifiers, and achieving Effects of improving adhesion, improving brightness and corrosion resistance

Inactive Publication Date: 2008-02-27
TOYO ALUMINIUM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain a coating film with excellent brightness by using this method alone
Here, if the metal pigment obtained in the method of Patent Document 6 is treated with the surface modifier and electrostatically coated, it can be seen that the brightness of the coating film is improved to a certain extent, but the brightness improvement effect at this time cannot make the surface The effect of the modifier is fully exerted, and the required high-brightness coating film cannot be obtained
In other words, the corrosion resistance-enhancing resin-coated coating prevents the brightness-improving effect of the surface modifier as a result, and cannot obtain a desired level of width.
In addition, a small amount of coating of the surface modifier itself does not have the effect of improving corrosion resistance
[0020] As mentioned above, there are various methods for producing powder metal paint, but none of the methods can obtain a coating film that satisfies both the metallic luster and brilliance that sufficiently satisfy the color tone, and the corrosion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] First, a metallic pigment paste (trade name: 7640NS, manufactured by Toyo Aluminum Co., Ltd.), which is a paste of aluminum flakes, was washed with mineral spirits and filtered. The non-volatile content of the paste after washing and filtering was 70.0% by mass.

[0107] In a 1-liter separable flask, 599.5 g of mineral spirits were added to 171.4 g of the paste, and stirred to form a slurry. Stirring was continued, nitrogen gas was purged and released into the system to form a nitrogen atmosphere, and then the temperature was raised to 80°C. Unless otherwise specified, the following operations are carried out in accordance with this condition.

[0108] Add 0.85 g of acrylic acid, 8.3 g of epoxidized 1,2-polybutadiene, 9.5 g of trimethylolpropane triacrylate, 3.8 g of divinylbenzene, and azobis Isobutyronitrile (AIBN) 0.67g. After adding the monomer and AIBN, it was allowed to react for 4 hours, then 1.3 g of dimethylaminoethyl methacrylate, 0.6 g of trimethylolpropan...

Embodiment 2

[0116] 3.6 g of the surfactant solution was diluted with 66.0 g of cyclohexanone, added to 70.0 g of the paste obtained in Example 1, and kneaded at room temperature for 20 minutes to obtain a slurry. The obtained slurry was added a little at a time to 1 liter of heptane which had been vigorously stirred, and dispersed. The dispersion liquid was filtered, washed and filtered with heptane, and the resulting cake was spread in a vat and allowed to dry naturally overnight. The dried metallic pigment powder was passed through a sieve with a mesh size of 100 μm to obtain a metallic pigment for powder coating. Then, this metallic pigment is referred to as Pigment C. Table 1 shows the amount (% by mass) of the surface modifier relative to the metallic pigment in Pigment C.

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PUM

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Abstract

The present invention provides a metallic pigment that simultaneously imparts excellent high brightness and excellent corrosion resistance to a coating film, and a paint containing the metallic pigment. The present invention relates to a metal pigment that uses aluminum particles as base particles to form a single or multi-layer covering layer covering the surface of the aluminum particles, wherein the outermost layer of the covering layer contains a polymer having an alkaline group and at least one polymerization layer. A polymer obtained by polymerization of monomers with sexual double bonds. In addition, it is preferable to form a surface modifier layer on the metallic pigment. The invention also relates to a coating containing the metallic pigment.

Description

technical field [0001] The present invention relates to a metallic pigment capable of achieving both high brightness and corrosion resistance, and a paint containing the metallic pigment. Specifically, the present invention relates to a metallic pigment capable of maintaining good corrosion resistance even when a surface modifier layer is formed on the metallic pigment to improve the brightness of the coating film, and a powder coating material containing the metallic pigment . Background technique [0002] In recent years, powder coating compositions have attracted attention as a feature of low-pollution coatings that do not use organic solvents, and demand is increasing in various industrial fields such as auto parts, home appliances, furniture, machine tools, office equipment, building materials, and toys. . [0003] Powder coating compositions generally do not use organic solvents and do not cause environmental problems or disasters caused by organic solvents, so it ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/10C09D5/29C09D7/12C09D201/00
CPCC09C1/64C09D5/035C09C1/644C09D5/29Y02P20/582C09C3/10C09D201/00
Inventor 高野靖
Owner TOYO ALUMINIUM KK