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US4057566A
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Fluorocarbon siloxane compositions
Assignee: Dow Silicones Corp
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Filing: 1976-01-08
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Granted: 1977-11-08
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Expires: 1996-01-08
Abstract
Abstract Fluorocarbon siloxanes of the formula ##STR1## ARE DISCLOSED. Their use as reversion resistant curing agents in curable compositions comprising reversion resistant siloxanes of the formula ##STR2## are also disclosed.
Inventors
- 👤 Philip L. Carter
- 👤 Yung K. Kim
- 👤 Michael O. Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:03
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/485; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0896; C07F7/12; C08L; C08L83/00; C08L83/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A composition of the formula ##STR20## wherein each R and R' is independently methyl, phenyl, or 3,3,3-trifluoropropyl, R f is a perfluoroalkylene radical of 2 to 10 carbon atoms, a perfluorocycloalkylene radical, or a perfluoroalkylene radical of 2 to 10 carbon atoms or a perfluorocycloalkylene radical containing one or more --C--O--C-- linkages and each n is independently 1, 2, or 3.
Claim 2
Dependent Claim
61 words
A composition of the formula ##STR20## wherein each R and R' is independently methyl, phenyl, or 3,3,3-trifluoropropyl, R f is a perfluoroalkylene radical of 2 to 10 carbon atoms, a perfluorocycloalkylene radical, or a perfluoroalkylene radical of 2 to 10 carbon atoms or a perfluorocycloalkylene radical containing one or more --C--O--C-- linkages and each n is independently 1, 2, or 3.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein R f contains from 2 to 6 carbon atoms.
Claim 4
Dependent Claim
14 words
The composition of claim 2 wherein R f is --CF 2 CF 2 --.
Claim 5
Dependent Claim
9 words
The composition of claim 3 wherein R' is methyl.
Claim 6
Dependent Claim
9 words
The composition of claim 1 having the formula ##STR21##
Claim 7
Dependent Claim
9 words
The composition of claim 1 having the formula ##STR22##
References Cited (Backward Citations)
US3398177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |