Super water-repellent coating material, and super water-repellent coating film using the same
First Claim
1. A solid body having a super water-repellent coating film comprising an organic coating film formed on a surface of the solid body, surface roughness of said surface being at least 200 nm, whereinsaid organic coating film comprises:
- a first layer having fractal dimension of at least 2.4, which is obtained by coating said surface of the solid body with a coating material containing an organic polymer and having dispersed therein at least two kinds of fillers, anda second layer composed of a perfluoropolyoxyalkyl group compound or a perfluoropolyoxyalkylene group compound on the surface of said first layer.
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Accused Products
Abstract
A super water-repellent coating film is formed of a super water-repellent coating material comprising an organic coating material composed of organic polymer, a filler mixture composed of plural kinds of fillers of at least 5 nm in average particle diameter, which is dispersed in the coating material, and a perfluoropolyoxyalkyl group compound. Because the surface of various solid bodies can be made super water-repellent by a simple process using this water-repellent coating material, the coating film can be utilized in various fields, such as preventing snow covering, frosting, ice coating, water adhering, and other applications.
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Citations
25 Claims
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1. A solid body having a super water-repellent coating film comprising an organic coating film formed on a surface of the solid body, surface roughness of said surface being at least 200 nm, wherein
said organic coating film comprises: -
a first layer having fractal dimension of at least 2.4, which is obtained by coating said surface of the solid body with a coating material containing an organic polymer and having dispersed therein at least two kinds of fillers, and a second layer composed of a perfluoropolyoxyalkyl group compound or a perfluoropolyoxyalkylene group compound on the surface of said first layer. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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11. A solid body as claimed in claim 10, wherein
said perfluoropolyoxyalkyl group contains the oxyalkylene repeating unit expressed by the following formulas (II), (III), or (Iv), individually or as a mixture of these units; - ##STR15##
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12. A solid body as claimed in claim 11, wherein said solid body is an evaporator fin, having a fin member and said coating film covering said fin member.
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13. A solid body as claimed in claim 11, wherein said solid body is a refrigerating air conditioner provided with an evaporator fin, said evaporator fin having a fin member and said coating film covering said fin member.
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14. A solid body as claimed in claim 11, wherein said solid body is an electric wire coated with said coating film.
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15. A method for forming the solid body claimed in claim 11, comprising the steps of:
- dispersing a filler mixture composed of at least two kinds of fillers into a solution containing perfluoropolyoxyalkyl group compound or perfluoropolyoxyalkylene group compound, and
applying said dispersed solution onto the solid body.
- dispersing a filler mixture composed of at least two kinds of fillers into a solution containing perfluoropolyoxyalkyl group compound or perfluoropolyoxyalkylene group compound, and
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16. A solid body as claimed in claim 10, wherein said solid body is an evaporator fin, having a fin member and said coating film covering said fin member.
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17. A solid body as claimed in claim 10, wherein said solid body is a refrigerating air conditioner provided with an evaporator fin, said evaporator fin having a fin member and said coating film covering said fin member.
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18. A solid body as claimed in claim 10, wherein said solid body is an electric wire coated with said coating film.
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19. A method for forming the solid body claimed in claim 10, comprising the steps of:
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dispersing a filler mixture composed of at least two kinds of fillers into a solution containing perfluoropolyoxyalkyl group compound or perfluoropolyoxyalkylene group compound, and applying said dispersed solution onto the solid body.
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20. A solid body as claimed in either of claims 1 and 2, wherein the at least two kinds of fillers have different diameters from each other.
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21. A solid body as claimed in either of claims 1 and 2, wherein said fillers have a specific surface area of at least 100 m2 /g.
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22. A solid body as claimed in either of claims 1 and 2, wherein said solid body is an evaporator fin, having a fin member and said coating film covering said fin member.
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23. A solid body as claimed in either of claims 1 and 2, wherein said solid body is a refrigerating air conditioner provided with an evaporator fin, said evaporator fin having a fin member and said coating film covering said fin member.
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24. A solid body as claimed in either of claims 1 and 2, wherein said solid body is an electric wire coated with said coating film.
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25. A method for forming the solid body claimed in either of claims 1 and 2, comprising the steps of:
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dispersing a filler mixture composed of at least two kinds of fillers into a solution containing perfluoropolyoxyalkyl group compound or perfluoropolyoxyalkylene group compound, and applying said dispersed solution onto the solid body.
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2. A solid body having a super water-repellent coating film comprising an organic coating film formed on a surface of the solid body, surface roughness of said surface being at least 200 nm, wherein
said organic coating film comprises: -
a first layer having fractal dimension of at least 2.4, which is obtained by coating said surface of the solid body with a coating material containing an organic polymer and having dispersed therein at least two kinds of fillers, and a surface multiple coefficient, which is a coefficient giving the ratio of actual area of a rough surface to the projected area, in the range of at least 2.0, and a second layer composed of a perfluoropolyoxyalkyl group compound or a perfluoropolyoxyalkylene group compound on the surface of said first layer.
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Specification