US4481341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting organopolysiloxane mixtures containing platinum catalyst dispersed in solid silicone resin
Assignee: Momentive Performance Materials GmbH
•
Filing: 1982-08-02
•
Granted: 1984-11-06
•
Expires: 2002-08-02
Abstract
Abstract A thermosetting organopolysiloxane and organohydrogenpolysiloxane mixture contains a catalytic amount of platinum or a platinum compound finely dispersed in a solid substance at a concentration of 0.01-5% by weight calculated as platinum metal and based on the total weight of catalyst and solid substance, wherein the solid platinum-containing catalyst material has a melting point or softening point between 70° and 250° C., is practically immiscible with the organopolysiloxane and organohydrogenpolysiloxane mixture below the melting point or the softening point, and is finely dispersible therein.
Inventors
- 👤 Ottfried Schlak
- 👤 Werner Michel
- 👤 Bernard Munchenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; Y; Y10; Y10S; Y10S525/00; Y10S525/936
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
Thermosetting organopolysiloxane mixtures, with good storage stability at room temperature, which are settable by addition of a silicon bonded hydrogen to an unsaturated carbon to carbon bond, said mixture containing at least one organopolysiloxane having in each molecule at least two unsaturated monovalent hydrocarbon moieties bonded to the silicon atom, at least one organohydrogenpolysiloxane having in each molecule at least two hydrogen atoms bonded to the silicon atom, and a catalyst amount of platinum or a platinum compound finely dispersed in a solid silicone resin at a concentration of 0.01-5%, by weight calculated as platinum metal and based on the total weight of catalyst and solid resin, wherein the solid platinum-containing catalyst material has a melting point or softening point between 70° and 250° C., is practically imiscible with the organopolysiloxane and organohydrogenpolysiloxane mixture below the melting point or the softening point, and is finely dispersible therein.
Claim 2
Dependent Claim
147 words
Thermosetting organopolysiloxane mixtures, with good storage stability at room temperature, which are settable by addition of a silicon bonded hydrogen to an unsaturated carbon to carbon bond, said mixture containing at least one organopolysiloxane having in each molecule at least two unsaturated monovalent hydrocarbon moieties bonded to the silicon atom, at least one organohydrogenpolysiloxane having in each molecule at least two hydrogen atoms bonded to the silicon atom, and a catalyst amount of platinum or a platinum compound finely dispersed in a solid silicone resin at a concentration of 0.01-5%, by weight calculated as platinum metal and based on the total weight of catalyst and solid resin, wherein the solid platinum-containing catalyst material has a melting point or softening point between 70° and 250° C., is practically imiscible with the organopolysiloxane and organohydrogenpolysiloxane mixture below the melting point or the softening point, and is finely dispersible therein.
Claim 3
Dependent Claim
15 words
Thermosetting organopolysiloxane mixtures according to claim 1 wherein said silicone resin contains unsaturated hydrocarbon moieties.
Claim 4
Dependent Claim
14 words
Thermosetting organopolysiloane mixtures according to claim 2 wherein said silicon resin contains vinyl moieties.
Claim 5
Dependent Claim
21 words
Thermosetting organopolysiloxane mixtures according to claim 1 wherein said solid substance in the platinum-containing catalyst material is a non-silicon organic substance.
Claim 6
Dependent Claim
21 words
Thermosetting organosiloxane mixtures according to claim 1 further comprising a filler, a pigment, a dispersing auxiliary and an adhesion promoting auxiliary.
References Cited (Backward Citations)
US2837494A
Cited
US3070559A
Cited
US3790515A
Cited
US3989666A
Cited
US3983298A
Cited
GB2000165A
Cited
EP0015346A1
Cited
US4293677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |