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US4827042A
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Perfluoropolyethers
Assignee: Exfluor Research Corp
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Filing: 1987-09-02
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Granted: 1989-05-02
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Expires: 2007-09-02
Abstract
Abstract Perfluoropolyethers containing high concentrations of difluoromethylene oxide units in the polymer chain are disclosed.
Inventors
- 👤 Richard J. Lagow
- 👤 Thomas R. Bierschenk
- 👤 Timothy J. Juhlke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:23
CPC Classifications
C; C10; C10M; C10M119/00; C10M119/22; C08; C08G; C08G2/00; C08G2/30; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G65/02; C08G65/32; C08G65/321; C08G65/323; C08G65/3233; C08G65/3236; C10M107/00; C10M107/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
Perfluoropolyethers of the formula: R.sub.f1 --(OCF.sub.2).sub.n --(OY).sub.m --OR.sub.f2 wherein: the units OCF 2 and OY are randomly distributed along the polymer chain; Y is --CF 2 CF 2 CF 2 --, --CF 2 CF 2 CF 2 CF 2 --, --CF(C 2 F 5 )CF 2 --, --CF 2 CF 2 OCF 2 CF 2 -- or --CF 2 CF(CF 2 C1)--; wherein Rf 1 and Rf 2 may be the same or different and are selected from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 2 F 4 Cl and C 3 F 6 Cl; n an integer greater than 1; and m is an integer equal or greater than 1 such that the ratio n/m is greater than 1 and less than about 100; the perfluoropolyethers having a molecular weight from about 300 to about 50,000 atomic mass units.
Claim 2
Dependent Claim
152 words
Perfluoropolyethers of the formula: R.sub.f1 --(OCF.sub.2).sub.n --(OY).sub.m --OR.sub.f2 wherein: the units OCF 2 and OY are randomly distributed along the polymer chain; Y is --CF 2 CF 2 CF 2 --, --CF 2 CF 2 CF 2 CF 2 --, --CF(C 2 F 5 )CF 2 --, --CF 2 CF 2 OCF 2 CF 2 -- or --CF 2 CF(CF 2 C1)--; wherein Rf 1 and Rf 2 may be the same or different and are selected from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 2 F 4 Cl and C 3 F 6 Cl; n an integer greater than 1; and m is an integer equal or greater than 1 such that the ratio n/m is greater than 1 and less than about 100; the perfluoropolyethers having a molecular weight from about 300 to about 50,000 atomic mass units.
Claim 3
Dependent Claim
15 words
Perfluoropolyethers of claim 1, wherein the ratio n/m is from about 100/1 to about 10/1.
Claim 4
Dependent Claim
147 words
A perfluoropolyether having a chain structure consisting essentially of repeating units --OCF 2 -- and --OY-- randomly distributed along the chain and of terminal groups selected from the group consisting of CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 2 F 4 Cl and C 3 F 6 Cl, wherein Y is --CF 2 CF 2 CF 2 --, --CF 2 CF 2 CF 2 CF 2 --, --CF(C 2 F 5 )CF 2 --, or --CF 2 CF 2 OCF 2 CF 2 -- or --CF 2 CF(CF 2 Cl)--, the units being randomly distributed along the chain, the ratio of the number of --OCF 2 -- units to --OY-- units being greater than 1 and less than about 100, the perfluoropolyether having a molecular weight from about 300 to about 50,000 atomic mass units.
Claim 5
Dependent Claim
147 words
A perfluoropolyether having a chain structure consisting essentially of repeating units --OCF 2 -- and --OY-- randomly distributed along the chain and of terminal groups selected from the group consisting of CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 2 F 4 Cl and C 3 F 6 Cl, wherein Y is --CF 2 CF 2 CF 2 --, --CF 2 CF 2 CF 2 CF 2 --, --CF(C 2 F 5 )CF 2 --, or --CF 2 CF 2 OCF 2 CF 2 -- or --CF 2 CF(CF 2 Cl)--, the units being randomly distributed along the chain, the ratio of the number of --OCF 2 -- units to --OY-- units being greater than 1 and less than about 100, the perfluoropolyether having a molecular weight from about 300 to about 50,000 atomic mass units.
References Cited (Backward Citations)
US3665041A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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