US4310679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equilibrating organosiloxanes with fluorine- and sulphonyl-containing catalysts
Assignee: Momentive Performance Materials GmbH
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Filing: 1980-12-03
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Granted: 1982-01-12
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Expires: 2000-12-03
Abstract
Abstract In the preparation of equilibration products of organosiloxanes by contacting at least one organosiloxane with a cation exchange resin, the improvement which comprises employing as said resin a polymer having side chains carrying sulphonyl groups, the carbon atoms carrying the sulphonyl groups also carrying at least one fluorine atom.
Inventors
- 👤 Ulrich Finke
- 👤 Hans-Heinrich Moretto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C08G77/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
In the preparation of equilibration products of organosiloxanes by contacting at least one organosiloxane with a cation exchange resin, the improvement which comprises employing as said resin a polymer having side chains carrying sulphonyl groups, the carbon atoms carrying the sulphonyl groups also carrying at least one fluorine atom.
Claim 2
Dependent Claim
49 words
In the preparation of equilibration products of organosiloxanes by contacting at least one organosiloxane with a cation exchange resin, the improvement which comprises employing as said resin a polymer having side chains carrying sulphonyl groups, the carbon atoms carrying the sulphonyl groups also carrying at least one fluorine atom.
Claim 3
Dependent Claim
47 words
A process according to claim 1, wherein the organosiloxane comprises at least one compound of the average formula Y.sub.a Si(O.sub.4-a) wherein Y is hydrogen, or a substituted or unsubstituted monovalent or divalent hydrocarbon radical with up to 30 carbon atoms, and a is 1, 2 or 3.
References Cited (Backward Citations)
US2779776A
Cited
US4122247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |