Patent US5523162A successfully refreshed from Google Patents.
US5523162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water repellent surface treatment for plastic and coated plastic substrates
Assignee: PPG Industries Ohio Inc
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Filing: 1994-12-27
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Granted: 1996-06-04
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Expires: 2014-12-27
Abstract
Abstract A method and article are disclosed wherein a plastic substrate is provided with a more durable non-wetting surface by deposition of a silica primer layer prior to treatment with perfluoroalkylalkylsilane and optionally a fluorinated olefin telomer on the surface which comprises the silica primer layer.
Inventors
- 👤 Helmut Franz
- 👤 George B. Goodwin
- 👤 Gary J. Marietti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:19
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C03; C03C; C03C17/00; C03C17/006; C03C17/008; C03C17/009; C03C17/28; C03C17/30; C03C17/32; C03C17/328; C08; C08J; C08J7/00; C08J7/04; C08J7/054; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
An article comprising a plastic substrate the surface of which is coated with a. a silica primer layer; and b. a perfluoroalkylalkylsilane bonded to said silica primer layer wherein said perfluoroalkylalkylsilane is selected from compounds having the general formula R m (R' n )SiX 4-n-m , wherein R is a perfluoroalkylalkyl radical, R' is selected from the group consisting of vinyl and alkyl radicals, m is one, n is zero or one, m+n is less than 4, and X is a radical selected from the group consisting of halogen, alkoxy and acyl radicals.
Claim 2
Dependent Claim
93 words
An article comprising a plastic substrate the surface of which is coated with a. a silica primer layer; and b. a perfluoroalkylalkylsilane bonded to said silica primer layer wherein said perfluoroalkylalkylsilane is selected from compounds having the general formula R m (R' n )SiX 4-n-m , wherein R is a perfluoroalkylalkyl radical, R' is selected from the group consisting of vinyl and alkyl radicals, m is one, n is zero or one, m+n is less than 4, and X is a radical selected from the group consisting of halogen, alkoxy and acyl radicals.
Claim 3
Dependent Claim
25 words
An article according to claim 1, wherein said perfluoroalkylalkyl radical comprises a perfluoroalkyl moiety of the formulae CF 3 to C 30 F 61 .
Claim 4
Dependent Claim
21 words
An article according to claim 2, wherein said perfluoroalkyl moiety comprises C 6 F 13 to C 18 F 37 .
Claim 5
Dependent Claim
21 words
An article according to claim 3, wherein said perfluoroalkyl moiety comprises C 8 F 17 to C 12 F 25 .
Claim 6
Dependent Claim
20 words
An article according to claim 1, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 7
Dependent Claim
22 words
An article according to claim 1, wherein X is selected from the group consisting of chloro, iodo, bromo, methoxy, ethoxy and acetoxy.
Claim 8
Dependent Claim
27 words
An article according to claim 1, wherein said substrate is acrylic, and said perfluoroalkylalkylsilane is selected from the group consisting of perfluoroalkylethyltrichlorosilane, perfluoroalkylethyltriacetoxysilane, perfluoroalkylethyltrimethoxysilane, perfluoroalkylethyldichloro(ethyl)silane and perfluoroalkylethyldiethoxy(methyl)silane.
Claim 9
Dependent Claim
16 words
An article according to claim 7, wherein said perfluoroalkylalkylsilane is combined with a fluorinated olefin telomer.
Claim 10
Dependent Claim
28 words
An article according to claim 8, wherein said fluorinated olefin is a telomer comprises C m F 2m+1 CH═CH 2 , wherein m is from 1 to 30.
Claim 11
Independent Claim
105 words
A method of producing a non-wetting surface on a plastic substrate comprising the steps of: a. depositing a silica primer layer on a surface of said substrate; and b. depositing on said silica primer layer a composition comprising a perfluoroalkylalkylsilane wherein said perfluoroalkylalkylsilane is selected from compounds having the general formula R m (R' n )SiX 4-n-m , wherein R is a perfluoroalkylalkyl radical, R' is selected from the group consisting of vinyl and alkyl radicals, m is one, n is zero or one, m+n is less than 4, and X is a radical selected from the group consisting of halogen, alkoxy and acyl radicals.
Claim 12
Independent Claim
105 words
A method of producing a non-wetting surface on a plastic substrate comprising the steps of: a. depositing a silica primer layer on a surface of said substrate; and b. depositing on said silica primer layer a composition comprising a perfluoroalkylalkylsilane wherein said perfluoroalkylalkylsilane is selected from compounds having the general formula R m (R' n )SiX 4-n-m , wherein R is a perfluoroalkylalkyl radical, R' is selected from the group consisting of vinyl and alkyl radicals, m is one, n is zero or one, m+n is less than 4, and X is a radical selected from the group consisting of halogen, alkoxy and acyl radicals.
Claim 13
Dependent Claim
25 words
A method according to claim 10, wherein said perfluoroalkylalkyl radical comprises a perfluoroalkyl moiety of the formulae CF 3 to C 30 F 61 .
Claim 14
Dependent Claim
15 words
A method according to claim 11, wherein said composition further comprises a fluorinated olefin telomer.
Claim 15
Dependent Claim
43 words
A method according to claim 12, wherein the step of depositing a silica primer layer is accomplished by applying to the substrate surface a solution of a hydrolyzable silicon-containing compound which hydrolyzes and condenses to form a silica-containing film on the substrate surface.
Claim 16
Dependent Claim
24 words
A method according to claim 13, wherein said hydrolyzable silicon-containing compound is selected from the group consisting of tetrachlorosilane, tetraacetoxysilane, hexachlorodisiloxane, and mixtures thereof.
Claim 17
Dependent Claim
45 words
A method according to claim 14, wherein said perfluoroalkylalkylsilane is selected from the group consisting of perfluoroalkylethyltrichlorosilane, perfluoroalkylethyltriacetoxysilane, perfluoroalkylethyltrimethoxysilane, perfluoroalkylethyldichloro(methyl)silane and perfluoroalkylethyldiethoxy(methyl)silane, and wherein said fluorinated olefin is a telomer comprising C m F 2m+1 CH═CH 2 , wherein m is from 1 to 30.
Claim 18
Dependent Claim
20 words
A method according to claim 14, wherein R' is selected from the group consisting of methyl, ethyl, vinyl and propyl.
Claim 19
Dependent Claim
22 words
A method according to claim 16, wherein X is selected from the group consisting of chloro, iodo, bromo, methoxy, ethoxy and acetoxy.
Claim 20
Dependent Claim
23 words
A method according to claim 15, wherein said telomer comprises C m F 2m+1 CH═CH 2 wherein m is from 4 to 10.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-04 | 1999-12-04 | 2000-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-04 | 2003-12-04 | 2004-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-04 | 2007-12-04 | 2008-06-04 | $7700.00 | Window Closed / Lapsed |