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Coating composition, method for manufacturing film using the same, and coated article using the same

Inactive Publication Date: 2013-01-03
NIPPON FUTSUSO INDS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a coating composition that has strong adhesive strength to various substrates, such as metal, ceramic, glass, and heat-resistant plastics, even when containing a fluoropolymer. The coating does not show deterioration of solvent resistance, high temperature resistance, or wear resistance, and it also reduces environmental load compared to conventional methods. The coating composition contains at least one kind of fluoropolymer component and an organic titanate, and the fluoropolymer used has heat-meltable characteristics. The technical effect of the invention is a coating with good adhesive strength that can protect various substrates from corrosion, high temperatures, and wear and tear.

Problems solved by technology

In the case where an organic resin having adhesive property is contained in the primer layer, there was a problem of deterioration of solvent resistance or high temperature resistance and still more corrosion resistance of a primer section, in a structure after adhesion with glass, metal or the like.

Method used

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  • Coating composition, method for manufacturing film using the same, and coated article using the same
  • Coating composition, method for manufacturing film using the same, and coated article using the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0093]Coating compositions (1) to (5) were prepared by mixing an aqueous dispersion of a fluoropolymer, an organic titanate, a thickener and water, which were shown in Table 1. In Table 1, unit of compounding amount of each component is weight parts.

TABLE 1Coating composition(1)(2)(3)(4)(5)Fluoro-(I) MFR: 30 to 40 g / 104025——polymermin.(II) MFR: 11 to 18 g / 10—4030min.(III) MFR: 1 to 3 g / 10 min.————25Organic titanate6075607075Ti amount (wt % vs fluoropolymer)1530152330Thickener0.20.20.20.20.2

example 1

Preparation of a Three-Layered Coated Article

[0094]A substrate using SUS304 was subjected to sandblasting by #60 alumina. After the substrate was subjected to spray coating by the coating composition (1) obtained in the Preparation Example 1, and dried at 120° C. for 10 minutes, it was baked at 250° C. for 60 minutes to form a primer layer having a film thickness of 10 μm.

[0095]Next, the fluoropolymer (V) was coated on the primer layer by an electrostatic powder coating, and after baking it at 350° C. for 60 minutes, the fluoropolymer (IV) was further coated thereon and baked at 350° C. for 60 minutes to form an intermediate layer having a thickness of 100 μm.

[0096]Finally, the fluoropolymer (IV) was coated by an electrostatic powder coating, and baked at 350° C. for 60 minutes to form a top coating layer having a thickness of 50 μm.

Tests of Corrosion Resistance and Adhesive Strength:

[0097]A test specimen was obtained from the obtained coated article having a three-layered film (a t...

example 2

[0098]The three-layered coated article was prepared similarly as in Example 1, except for using the coating composition (2) instead of the coating composition (1), to perform the tests of corrosion resistance and adhesive strength. Results thereof are shown in Table 2.

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Abstract

A chromium-free fluoropolymer-containing primer composition, which can provide a coated article having excellent higher corrosion resistance by forming a fluoropolymer coating film, and a primer layer having sufficient adhesive strength to the fluoropolymer coating film on the surface of a substrate such as metal, glass, ceramic and heat resistant plastics, a method for manufacturing a coating film using the same, and a coated article using the same. The coating composition contains at least one kind of a fluoropolymer component selected from a reactive functional group-containing fluoropolymer, and a fluoropolymer having a melt flow rate (MFR), measured under a load of 5 kg and at 372° C., in accordance with ASTM D1238, of 10 to 100 g / 10 minutes, and an organic titanate, wherein content of titanium contained in the organic titanate, relative to the fluoropolymer component, is 1 to 40% by weight.

Description

TECHNICAL FIELD[0001]The present invention relates to a coating composition containing a fluoropolymer, a method for manufacturing a film using the same, and a coated article using the same. In more detail, the present invention relates to a coating composition, suitably applicable to a primer layer effective to form a fluoropolymer coated article onto metal, glass, ceramic and plastic, or the like, a method for manufacturing a film using the same, and a coated article using the same.BACKGROUND ART[0002]Since a fluoropolymer has superior non-stick property, it has wide applications in various application goods which require non-stick property such as frying pan, a bread mold and a rice cooker. Although the fluoropolymer has superior non-stick property originated from surface free energy when compared with other resins, it has, on the other hand, difficulty of adhesion to other substances, and therefore it has a problem that the formation of a fluoropolymer coating film onto a substr...

Claims

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Application Information

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IPC IPC(8): C09D129/10B32B7/02B32B19/04C08K5/17B32B27/08B05D7/24B05D3/02B32B17/10B32B15/08
CPCC09D5/002Y10T428/269C09D127/12C08K5/0091C08K5/057C08K5/098C09D127/18Y10T428/24967C08L27/12C08L27/18B05D7/24C09D5/00C08K2201/019C09D5/08C09D129/10
Inventor FUKUMURA, NAOKITAKEYAMA, MASAHIRONAKAZAWA, RYO
Owner NIPPON FUTSUSO INDS
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