Patent US5631340A successfully refreshed from Google Patents.
US5631340A
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Cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, and optical gas sensors fabricated therewith
Assignee: Optical Sensors Inc
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Filing: 1995-03-01
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Granted: 1997-05-20
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Expires: 2015-03-01
Abstract
Abstract An optical sensor is provided for measuring dissolved gases such as O2 or CO2 in a fluid sample. The sensor is formulated so as to contain a gas permeable membrane of a cured perfluorinated urethane polymer and, incorporated therein, a gas-sensitive indicator component. Methods for making and using the membrane and sensor are provided as well.
Inventors
- 👤 Alan Olstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:57
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/7703; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/67; C08G18/671; C08G18/672; G01N2021/7706; G01N2021/772
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
119 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR5## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., or combinations thereof, with a cross-linking agent selected from the group consisting of water, diols of the formula HO--R--OH wherein R is alkylene of 1 to 6 carbon atoms, bisphenol A and hexafluorobisphenol A, wherein the cross-linking agent is present such that, it represents on the order of 0.5 to 5 wt. % of the cured perfluorinated urethane polymer.
Claim 2
Dependent Claim
119 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR5## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., or combinations thereof, with a cross-linking agent selected from the group consisting of water, diols of the formula HO--R--OH wherein R is alkylene of 1 to 6 carbon atoms, bisphenol A and hexafluorobisphenol A, wherein the cross-linking agent is present such that, it represents on the order of 0.5 to 5 wt. % of the cured perfluorinated urethane polymer.
Claim 3
Dependent Claim
88 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR6## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., and n is an integer in the range of 0 to 6 inclusive, by treating the precursor with radiation in the presence of a catalytic amount of a photoinitiator.
Claim 4
Dependent Claim
88 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR6## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., and n is an integer in the range of 0 to 6 inclusive, by treating the precursor with radiation in the presence of a catalytic amount of a photoinitiator.
Claim 5
Dependent Claim
88 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR7## Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, ##STR8## by treating the precursor with radiation in the presence of a cationic photoinitiator.
Claim 6
Dependent Claim
88 words
A cured perfluorinated urethane polymer prepared by the process which comprises cross-linking a perfluorinated urethane polymer precursor having the structural formula ##STR7## Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure .paren open-st.CF 2 O.paren close-st., .paren open-st.CF 2 CF 2 O.paren close-st., or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, ##STR8## by treating the precursor with radiation in the presence of a cationic photoinitiator.
Claim 7
Dependent Claim
25 words
The polymer of claim 1, wherein the cross-linking agent represents on the order of 0.5 to 1 wt. % of the cured perfluorinated urethane polymer.
Claim 8
Dependent Claim
11 words
The polymer of claim 1, wherein the cross-linking agent is water.
Claim 9
Dependent Claim
12 words
The polymer of claim 1, wherein the cross-linking agent is a diol.
Claim 10
Dependent Claim
12 words
The polymer of claim 1, wherein the cross-linking agent is bisphenol A.
Claim 11
Dependent Claim
12 words
The polymer of claim 1, wherein the cross-linking agent is hexafluorobisphenol A.
Claim 12
Dependent Claim
29 words
The polymer of claim 1, wherein Ar is phenylene, either unsubstituted or substituted with one to four substituents selected from the group consisting of lower alkyl, halogen and nitro.
Claim 13
Dependent Claim
9 words
The polymer of claim 9, wherein Ar is phenylene.
Claim 14
Dependent Claim
19 words
The polymer of claim 1, wherein X contains in the range of approximately 10 to 50 recurring mer units.
Claim 15
Dependent Claim
19 words
The polymer of claim 11, wherein X contains in the range of approximately 15 to 25 recurring mer units.
Claim 16
Dependent Claim
25 words
The polymer of claim 2, wherein the photoinitiator is selected from the group consisting of α-alkoxy deoxybenzoins, α,α-dialkoxy deoxybenzoins, α,α-dialkoxy acetophenones, benzophenones, thioxanthones and benzils.
Claim 17
Dependent Claim
29 words
The polymer of claim 2, wherein Ar is phenylene, either unsubstituted or substituted with one to four substituents selected from the group consisting of lower alkyl, halogen and nitro.
Claim 18
Dependent Claim
9 words
The polymer of claim 14, wherein Ar is phenylene.
Claim 19
Dependent Claim
19 words
The polymer of claim 2, wherein X contains in the range of approximately 10 to 50 recurring mer units.
Claim 20
Dependent Claim
19 words
The polymer of claim 16, wherein X contains in the range of approximately 15 to 25 recurring mer units.
Claim 21
Dependent Claim
13 words
The polymer of claim 3, wherein the cationic photoinitiator is a sulfonium salt.
Claim 22
Dependent Claim
29 words
The polymer of claim 3, wherein Ar is phenylene, either unsubstituted or substituted with one to four substituents selected from the group consisting of lower alkyl, halogen and nitro.
Claim 23
Dependent Claim
9 words
The polymer of claim 19, wherein Ar is phenylene.
Claim 24
Dependent Claim
19 words
The polymer of claim 3, wherein X contains in the range of approximately 10 to 50 recurring mer units.
Claim 25
Dependent Claim
19 words
The polymer of claim 21, wherein X contains in the range of approximately 15 to 25 recurring mer units.
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