US5688864A — Autophobic water repellent surface treatment

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.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2000-11-17	2001-05-19	2001-11-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2004-11-17	2005-05-19	2005-11-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2008-11-17	2009-05-19	2009-11-18	$7700.00	Window Closed / Lapsed

Autophobic water repellent surface treatment

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag