EP0745568A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Autophobic water repellent surface treatment
Assignee: PPG Industries Ohio Inc
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Filing: 1996-05-17
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Granted: —
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Expires: 2016-05-17
Abstract
Abstract A composition and method are disclosed to provide a substrate such as glass, plastic, metal, inorganic polymer coated substrate or inorganic coated substrate with a durable non-wetting surface. The composition includes a perfluoroalkylalkyl silane selected from compounds having the general formula R m R' n SiX 4-m-n where R is a perfluoroalkylalkyl radical, R' is an alkyl or vinyl radical, m is 1 and n is 0 or 1, m+n is not greater than 3, and X is selected from halogen, alkoxy or acyloxy radicals. The perfluoroalkylalkyl silane is in a solvent such as an alkane, alkene, aromatic hydrocarbons, ether, ketone or halogenated hydrocarbon which together form a composition which initially wets the surface. As the perfluoroalkylalkyl silane reacts with the surface, the remaining composition is repelled by the perfluoroalkylalkyl silane treated surface due to the difference between the surface tension of the solvent and the free energy of the treated surface, for expedient removal of the remaining composition from the treated surface.
Inventors
- 👤 George B. Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 06:43
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C03; C03C; C03C17/00; C03C17/006; C03C17/008; C03C17/009; C03C17/28; C03C17/30
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
A composition for producing a nonwetting surface on a substrate comprising a perfluoroalkylalkyl silane and at least one solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the treated substrate, and a boiling point sufficiently high to prevent evaporation of the solvent during application of the composition to the substrate surface.
Claim 2
Dependent Claim
66 words
A composition according to claim 1, wherein said perfluoroalkylalkyl silane is selected from compounds having the general formula R m R' n SiX 4-m-n , wherein R is a perfluoroalkylalkyl radical, R' is an alkyl or vinyl radical, m is 1, n is 0 or 1, m+n is not greater than 3, and X is selected from the group consisting of halogen, alkoxy and acyloxy radicals.
Claim 3
Dependent Claim
29 words
A composition according to claim 2, wherein the perfluoroalkyl moiety of said perfluoroalkylalkyl radical is selected from the group consisting of CF 3 to C 30 F 61 .
Claim 4
Dependent Claim
27 words
A composition according to claim 3, wherein said perfluoroalkyl moiety is selected from the group consisting of C 6 F 13 to C 18 F 37 .
Claim 5
Dependent Claim
27 words
A composition according to claim 4, wherein said perfluoroalkyl moiety is selected from the group consisting of C 8 F 17 to C 12 F 25 .
Claim 6
Dependent Claim
20 words
A composition according to claim 2, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 7
Dependent Claim
22 words
A composition according to claim 3, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 8
Dependent Claim
38 words
A composition according to claim 2, wherein said solvent comprises a solvent having a boiling point of at least 65°C, and selected from the group consisting of alkanes, alkenes, aromatic hydrocarbons, ethers, ketones, halogenated hydrocarbons and mixtures thereof.
Claim 9
Dependent Claim
43 words
A composition according to claim 8, wherein said solvent comprises a solvent selected from the group consisting of hexanes, heptanes, octanes, decanes, dodecanes, hexadecanes, limonene, toluene, xylenes, n-butyl ether, cyclopentanone, cyclohexanone, methyl isobutyl ketone, chlorobenzene, trichloroethanes, trichlorotrifluoroethanes, methylene chloride, perfluorocarbons and mixtures thereof.
Claim 10
Independent Claim
65 words
A method of producing a non-wetting surface on a substrate comprising contacting a surface with a composition comprising a perfluoroalkylalkyl silane and at least one solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the treated substrate, and a boiling point sufficiently high to prevent complete evaporation of the solvent during application to the substrate surface.
Claim 11
Dependent Claim
68 words
A method according to claim 10, wherein said perfluoroalkylalkyl silane is selected from compounds having the general formula R m R' n SiX 4-m-n wherein R is a perfluoroalkylalkyl radical, R' is an alkyl or vinyl radical, m is 1, n is 0 or 1, and m+n is not greater than 3, and X is a radical selected from the group consisting of halogen, alkoxy and acyloxy radicals.
Claim 12
Dependent Claim
29 words
A method according to claim 11, wherein the perfluoroalkyl moiety of said perfluoroalkylalkyl radical is selected from the group consisting of CF 3 to C 30 F 61 .
Claim 13
Dependent Claim
27 words
A method according to claim 12, wherein said perfluoroalkyl moiety is selected from the group consisting of C 6 F 13 to C 18 F 37 .
Claim 14
Dependent Claim
27 words
A method according to claim 13, wherein said perfluoroalkyl moiety is selected from the group consisting of C 8 F 17 to C 12 F 25 .
Claim 15
Dependent Claim
20 words
A method according to claim 11, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 16
Dependent Claim
22 words
A method according to claim 11, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 17
Dependent Claim
38 words
A method according to claim 11, wherein said solvent comprises a solvent having a boiling point of at least 65°C, and selected from the group consisting of alkanes, alkenes, aromatic hydrocarbons, ethers, ketones, halogenated hydrocarbons and mixtures thereof.
Claim 18
Dependent Claim
43 words
A method according to claim 17, wherein said solvent comprises a solvent selected from the group consisting of hexanes, heptanes, octanes, decanes, dodecanes, hexadecanes, limonene, toluene, xylenes, n-butyl ether, cyclopentanone, cyclohexanone, methyl isobutyl ketone, chlorobenzene, trichloroethanes, trichlorotrifluoroethanes, methylene chloride, perfluorocarbons and mixtures thereof.
References Cited (Backward Citations)
EP0492545A2
Cited
US5368892A
Cited
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