Patent US4946818A successfully refreshed from Google Patents.
US4946818A
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Rhodium colloid, method of making, and use
Assignee: General Electric Co
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Filing: 1988-04-05
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Granted: 1990-08-07
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Expires: 2008-04-05
Abstract
Abstract A rhodim colloid has been found to be a superior catalyst for the hydrosilylation of silicon hydride having two or three hydrogens attached to silicon. The rhodium colloid is made by effecting reaction between rhodium trichloride and certain silicon hydride.
Inventors
- 👤 Larry N. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:53
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/10; C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/464; C07F7/08; C07F7/0801; C07F7/0803; C07F7/0825; C07F7/0827; C07F7/0829; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/12; C08G77/20; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A rhodium hydrosilylation catalyst consisting essentially of comprising the reaction product of rhodium trichloride and from 10 to about 100 moles of a silicon hydride, per mole of rhodium trichloride, where the silicon hydride has a boiling point of at least 25° C. at atmospheric pressure and the silicon atom of the silicon hydride is satisfied with from 1 to 3 hydrogen atoms and at least 1, and up to 3 monovalent radicals, other than hydrogen, selected from 1 or 2 C.sub.(1-13) hydrocarbon radicals and 1 to 3 C.sub.(1-8) alkoxy, siloxy, halogen and mixtures of such monovalent radicals.
Claim 2
Dependent Claim
98 words
A rhodium hydrosilylation catalyst consisting essentially of comprising the reaction product of rhodium trichloride and from 10 to about 100 moles of a silicon hydride, per mole of rhodium trichloride, where the silicon hydride has a boiling point of at least 25° C. at atmospheric pressure and the silicon atom of the silicon hydride is satisfied with from 1 to 3 hydrogen atoms and at least 1, and up to 3 monovalent radicals, other than hydrogen, selected from 1 or 2 C.sub.(1-13) hydrocarbon radicals and 1 to 3 C.sub.(1-8) alkoxy, siloxy, halogen and mixtures of such monovalent radicals.
Claim 3
Dependent Claim
90 words
A rhodium hydrosilylation atalyst in accordiance with claim 1, where the silicon hydride has the formula R.sub.a (R.sup.1).sub.b SiH.sub.(4-a-b) where R is a monovalent radical selected from C.sub.(1-13) monovalent hydrocarbon radicals, C.sub.(1-13) monovalent hydrocarbon radicals substituted with radicals inert during hydrosilylation, R 1 is selected from C.sub.(1-8) alkoxy radicals, siloxy, halogen or mixtures thereof, a is a whole number equal to 0 to 2 inclusive, b is a whole number equal to 0 to 3 inclusive and the sum of a and b is equal to 1 to 3 inclusive.
Claim 4
Dependent Claim
14 words
A hydrosilylation catalyst in accordance with claim 2, where the silicon hydride is methyldecylsilane.
Claim 5
Dependent Claim
14 words
A hydrosilylation catalyst in accordance with claim 2, where the silicon hydride is dimethylethoxysilane.
Claim 6
Dependent Claim
14 words
A hydrosilylation catalyst in accordance with claim 2, where the silicon hydride is triethoxysilane.
Claim 7
Dependent Claim
14 words
A hydrosilylation catalyst in accordance with claim 2, where the silicon hydride is tetramethyldisiloxane.
References Cited (Backward Citations)
US3048574A
Cited
US3231594A
Cited
US3328378A
Cited
US3296291A
Cited
US3336239A
Cited
US3546266A
Cited
US4578497A
Cited
US4572791A
Cited
US4705765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |