US5688864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autophobic water repellent surface treatment
Assignee: Vitro SAB de CV
•
Filing: 1996-10-21
•
Granted: 1997-11-18
•
Expires: 2016-10-21
Abstract
Abstract a composition and method are disclosed whereby a substrate such as glass, plastic, metal, inorganic polymer coated substrate or inorganic coated substrate is provided with a durable non-wetting surface by treatment with a perfluoroalkylalkyl silane in a solvent 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
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:55
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/30; C03C17/006; C03C17/008; C03C17/009; C03C17/32; C03C17/328; C09; C09K; C09K3/00; C09K3/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
151 words
A composition for producing a nonwetting surface on a substrate comprising a perfluoroalkylalkyl silane 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent evaporation of the solvent during application of the composition to the surface of the substrate and selected from the group consisting of toluene, naptha, chlorobenzene, ethers, ketones, perfluorinated organic compounds and mixtures thereof.
Claim 2
Dependent Claim
151 words
A composition for producing a nonwetting surface on a substrate comprising a perfluoroalkylalkyl silane 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent evaporation of the solvent during application of the composition to the surface of the substrate and selected from the group consisting of toluene, naptha, chlorobenzene, ethers, ketones, perfluorinated organic compounds and mixtures thereof.
Claim 3
Dependent Claim
33 words
The composition according to claim 1, wherein said solvent comprises a solvent selected from the group consisting of toluene, n-butyl ether, acetone, cyclopentanone, cyclohexanone, methyl isobutyl ketone, naphtha chlorobenzene, perfluorocarbons and mixtures thereof.
Claim 4
Dependent Claim
18 words
The composition according to claim 2 wherein the solvent has a boiling point of at least 65° C.
Claim 5
Dependent Claim
20 words
The composition according to claim 3, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 6
Dependent Claim
22 words
The composition according to claim 4, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 7
Dependent Claim
22 words
The composition according to claim 3, wherein said composition further comprises a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 8
Dependent Claim
14 words
The composition of claim 6 wherein said solvent further comprises a reactive drying agent.
Claim 9
Dependent Claim
37 words
The composition of claim 1 wherein said perfluoroalkylalkyl silane comprises a perfluoroalkylalkyl silane selected from the group consisting of a perfluoroalkylalkyl chlorosilane, a perfluoroalkylalkyl dichlorosilane and a perfluoroalkylalkl trichlorosilane and said solvent includes a reactive drying agent.
Claim 10
Dependent Claim
79 words
The composition according to claim 1, wherein the perfluoroalkylalkyl silane consists essentially of 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 .
Claim 11
Dependent Claim
27 words
The composition according to claim 9, wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from C 8 F 16 to C 12 F 25 .
Claim 12
Dependent Claim
18 words
The composition according to claim 9, wherein the solvent has a boiling point of at least 65° C.
Claim 13
Dependent Claim
24 words
The composition according to claim 11, wherein said solvent comprises a solvent selected from the group consisting of toluene, acetone, naphtha and mixtures thereof.
Claim 14
Dependent Claim
20 words
The composition according to claim 12, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 15
Dependent Claim
22 words
The composition according to claim 12, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 16
Dependent Claim
22 words
The composition according to claim 12, wherein said composition further comprises a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 17
Independent Claim
183 words
A method of producing a non-wetting surface on a substrate comprising the steps of: preparing a solution of a perfluoroalkylalkyl silane 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent complete evaporation of the solvent during application and selected from the group consisting of toluene, naptha, chlorobenzene, ethers, ketones, perfluorinated organic compounds and mixtures thereof; contacting a surface of the substrate with the solution wherein the boiling point of the solvent prevents complete evaporation of the solvent during application of the solution to the surface of the substrate.
Claim 18
Independent Claim
183 words
A method of producing a non-wetting surface on a substrate comprising the steps of: preparing a solution of a perfluoroalkylalkyl silane 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent complete evaporation of the solvent during application and selected from the group consisting of toluene, naptha, chlorobenzene, ethers, ketones, perfluorinated organic compounds and mixtures thereof; contacting a surface of the substrate with the solution wherein the boiling point of the solvent prevents complete evaporation of the solvent during application of the solution to the surface of the substrate.
Claim 19
Dependent Claim
18 words
The method according to claim 16, wherein the solvent has a boiling point of at least 65° C.
Claim 20
Dependent Claim
26 words
The method according to claim 17, wherein said preparing step further includes the solution comprising a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 21
Dependent Claim
86 words
The method according to claim 16, wherein during the practice of the contacting step the perfluoroalkylalkyl silane consists essentially of 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 X is selected from the group consisting of halogen, alkoxy and acylcxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 .
Claim 22
Dependent Claim
18 words
The method according to claim 19, wherein the solvent has a boiling point of at least 65° C.
Claim 23
Dependent Claim
27 words
The method according to claim 20, wherein said preparing step further includes the solution further comprising a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 24
Dependent Claim
37 words
The method of claim 16 wherein said perfluoroalkylalkyl silane comprises a perfluoroalkylalkyl silane selected from the group consisting of a perfluoroalkylalkyl chlorosilane, a perfluoroalkylalkyl dichlorosilane and a perfluoroalkylalkyl trichlorosilane and said solvent includes a reactive drying agent.
Claim 25
Dependent Claim
14 words
The method of claim 19 wherein said solvent further comprises a reactive drying agent.
Claim 26
Dependent Claim
162 words
A composition for producing a nonwetting surface on a substrate comprising a perfluoroalkylalkyl silane, the 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 selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent evaporation of the solvent during application of the composition to the surface of the substrate and selected from the group consisting of hexanes, heptanes, methylene chloride, naphtha, toluene acetone, perfluorocarbons and mixtures thereof.
Claim 27
Dependent Claim
162 words
A composition for producing a nonwetting surface on a substrate comprising a perfluoroalkylalkyl silane, the 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 selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 in a solvent said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent evaporation of the solvent during application of the composition to the surface of the substrate and selected from the group consisting of hexanes, heptanes, methylene chloride, naphtha, toluene acetone, perfluorocarbons and mixtures thereof.
Claim 28
Dependent Claim
18 words
The composition according to claim 24, wherein the solvent has a boiling point of at least 65° C.
Claim 29
Dependent Claim
20 words
The composition according to claim 25, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 30
Dependent Claim
22 words
The composition according to claim 25, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 31
Dependent Claim
27 words
The composition according to claim 25, wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from C 6 F 13 to C 12 F 25 .
Claim 32
Dependent Claim
22 words
The composition according to claim 25, wherein said composition further comprises a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 33
Dependent Claim
79 words
The composition according to claim 24, wherein the perfluoroalkylalkyl silane consists essentially of 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 X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from CF 3 to C 30 F 61 .
Claim 34
Dependent Claim
18 words
The composition according to claim 30, wherein the solvent has a boiling point of at least 65° C.
Claim 35
Dependent Claim
22 words
The composition according to claim 31, wherein said composition further comprises a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 36
Dependent Claim
20 words
The composition according to claim 32, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 37
Dependent Claim
22 words
The composition according to claim 32, wherein X is selected from the group consisting of chloro, bromo, iodo, methoxy, ethoxy and acetoxy.
Claim 38
Dependent Claim
27 words
The composition according to claim 32, wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected from C 8 F 16 to C 12 F 25 .
Claim 39
Dependent Claim
37 words
The composition of claim 24 wherein said perfluoroalkylalkyl silane comprises a perfluoroalkylalkyl silane selected from the group consisting of a perfluoroalkylalkyl chlorosilane, a perfluoroalkylalkyl dichlorosilane and a perfluoroalkylalkyl trichlorosilane and said solvent includes a reactive drying agent.
Claim 40
Dependent Claim
14 words
The composition of claim 29 wherein said solvent further comprises a reactive drying agent.
Claim 41
Independent Claim
188 words
A method of producing a non-wetting surface on a substrate comprising the steps of: preparing a solution of a perfluoroalkylalkyl silane 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 selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected CF 3 to C 30 F 61 and in a solvent, said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent complete evaporation of the solvent during application of the solution and selected from the group consisting of hexanes, heptanes, methylene chloride, naphtha, toluene, acetone. perfluorocarbons and mixtures thereof; contacting a surface of the substrate with the solution wherein the boiling point of the solvent prevents complete evaporation of the solvent during application to the substrate surface.
Claim 42
Independent Claim
188 words
A method of producing a non-wetting surface on a substrate comprising the steps of: preparing a solution of a perfluoroalkylalkyl silane 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 selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein the perfluoroalkyl moiety of the perfluoroalkylalkyl radical is selected CF 3 to C 30 F 61 and in a solvent, said solvent consisting essentially of an aprotic solvent having a surface tension at least 5 dynes per centimeter higher than the surface free energy of the substrate, a boiling point sufficiently high to prevent complete evaporation of the solvent during application of the solution and selected from the group consisting of hexanes, heptanes, methylene chloride, naphtha, toluene, acetone. perfluorocarbons and mixtures thereof; contacting a surface of the substrate with the solution wherein the boiling point of the solvent prevents complete evaporation of the solvent during application to the substrate surface.
Claim 43
Dependent Claim
18 words
The method according to claim 38, wherein the solvent has a boiling point of at least 65° C.
Claim 44
Dependent Claim
27 words
The method according to claim 39, wherein said preparing step further includes the composition further comprising a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 45
Dependent Claim
86 words
A method according to claim 38, wherein during the practice of the controlling step the perfluoroalkylalkyl silane consist essentially of compounds having the general formula R m R' n SiX 4-m-n , wherein R is a perfluoroalkylalkyl radical, R' is a alkyl or vinyl radical, m is 1, n is 0 or 1, and X is selected from the group consisting of halogen, alkoxy and acyloxy radicals wherein said perfluoroalkyl moiety of the perfluoroalkyalkyl radical is selected from CF 3 to C 30 F 61 .
Claim 46
Dependent Claim
18 words
The method according to claim 41, wherein the solvent has a boiling point of at least 65° C.
Claim 47
Dependent Claim
27 words
The method according to claim 42, wherein said preparing step further includes the composition further comprising a completely hydrolyzable silane capable of hydrolytic condensation to silica gel.
Claim 48
Dependent Claim
37 words
The method of claim 38 wherein said perfluoroalkylalkyl silane comprises a perfluoroalkyalkyl silane selected from the group consisting of a perfluoroalkylalkyl chlorosilane, a perfluoroalkylalkyl dichlorosilane and a perfluoroalkylalkyl trichlorosilane and said solvent includes a reactive drying agent.
Claim 49
Dependent Claim
14 words
The method of claim 40 wherein said solvent further comprises a reactive drying agent.
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