Patent US4633004A successfully refreshed from Google Patents.
US4633004A
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Fluorosilanes and process for their preparation
Assignee: Arkema France SA
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Filing: 1985-11-12
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Granted: 1986-12-30
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Expires: 2005-11-12
Abstract
Abstract Fluorosilanes containing at least one partially or totally fluorinated chain and at least one silicon chain linked with a thioether bridge, the fluorosilanes being prepared by radical addition of a silicon thiol to a fluorinated olefin, and the fluorosilanes being useful intermediates for the preparation of fluorinated silicones such as fluorinated silicone elastomers.
Inventors
- 👤 Bernard Boutevin
- 👤 Yves Pietrasanta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; C07F7/08; C07F7/0803; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0889; C07F7/12; C07F7/14; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
Fluorosilanes having the formula: wherein R 1 is halogen or an alkoxy group, R 2 and R 3 are each hydrogen, a halogen, an alkoxy group, an alkyl group, or an aryl group; u is two or three; m is one or two; R F is a partially or completely fluorinated hydrocarbon; and Q is a bivalent group having at least one oxygen atom.
Claim 2
Dependent Claim
64 words
Fluorosilanes having the formula: wherein R 1 is halogen or an alkoxy group, R 2 and R 3 are each hydrogen, a halogen, an alkoxy group, an alkyl group, or an aryl group; u is two or three; m is one or two; R F is a partially or completely fluorinated hydrocarbon; and Q is a bivalent group having at least one oxygen atom.
Claim 3
Dependent Claim
21 words
A fluorosilane according to claim 1 wherein R 1 and R 2 are chlorine or methoxy and R 3 is methyl.
Claim 4
Dependent Claim
10 words
A fluorosilane according to claim 1 wherein u is three.
Claim 5
Dependent Claim
10 words
A fluorosilane according to claim 1 wherein m is one.
Claim 6
Dependent Claim
19 words
A fluorosilane according to claim 1 wherein Q includes an ether group, an ester group, or an amide group.
Claim 7
Dependent Claim
23 words
A process for the preparation of a fluorosilane according to claim 1, which process comprises adding a thiosilicon group to a fluorinated olefin.
Claim 8
Dependent Claim
34 words
A process according to claim 6 wherein a silane-thiol having the formula: ##STR15## is reacted with a fluorinated olefin having at at least one terminal end a --CH═CH 2 or a --CF═CF 2 group.
Claim 9
Dependent Claim
30 words
A process according to claim 6 wherein the reaction is carried out in an aprotic organic solvent at a temperature of from 30° to 100° C. under a nitrogen atmosphere.
Claim 10
Dependent Claim
21 words
A process according to claim 6 wherein the reaction is carried out at a temperature of from 60° to 80° C.
Claim 11
Dependent Claim
22 words
A process for the preparation of fluorinated silicones which comprises reacting the fluorosilane according to claim 1 to form a fluorinated silicone.
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |