US3715334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platinum-vinylsiloxanes
Assignee: General Electric Co
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Filing: 1970-11-27
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Granted: 1973-02-06
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Expires: 1990-11-27
Abstract
Abstract Hydrosilation catalysts are provided in the form of platinumvinylsiloxanes which are substantially free of chemically combined halogen. The platinum-vinylsiloxanes can be made by effecting removal of chemically combined halogen from a platinum halide-vinylsiloxane reaction product. The platinumvinylsiloxanes can be employed as hydrosilation catalysts to make curable organopolysiloxane compositions.
Inventors
- 👤 B Karstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0086; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/398
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
223 words
In an efficient process for the production of organosilicon adducts containing silicon-carbon bonds, comprising contacting (G) a silicon material containing per molecule, at least one hydrogen atom attached to silicon, there being not more than two hydrogen atoms attached to any one silicon atom, and (J) a material containing aliphatic carbon atoms linked by multiple bonds, there is provided by the present invention, the improvement of contacting (G) and (J) in the presence of the platinum-vinylsiloxane essentially free of chemically combined halogen having at least.01 percent by weight platinum of the formula, in which the ratio of the average gram atoms of halogen to gram atoms of platinum does not exceed 0.1, where R is selected from the group consisting of alkyl radicals, alkenyl radicals, cycloalkyl radicals, aryl radicals, aralkyl radicals and halogenated radicals of the afore-mentioned types, c is an integer equal to 1 to 3, inclusive, d is a whole number equal to 0 to 2 inclusive, e is a whole number equal to 0 to 3 inclusive, x is an integer equal to 1to 100 inclusive, y is a whole number equal to 0 to 198, inclusive, and the sum of x +y is equal to 1 to 199 inclusive, and f has a value between about 0.67 to about 67, while f/x has a value up to about 0.67.
Claim 2
Dependent Claim
223 words
In an efficient process for the production of organosilicon adducts containing silicon-carbon bonds, comprising contacting (G) a silicon material containing per molecule, at least one hydrogen atom attached to silicon, there being not more than two hydrogen atoms attached to any one silicon atom, and (J) a material containing aliphatic carbon atoms linked by multiple bonds, there is provided by the present invention, the improvement of contacting (G) and (J) in the presence of the platinum-vinylsiloxane essentially free of chemically combined halogen having at least.01 percent by weight platinum of the formula, in which the ratio of the average gram atoms of halogen to gram atoms of platinum does not exceed 0.1, where R is selected from the group consisting of alkyl radicals, alkenyl radicals, cycloalkyl radicals, aryl radicals, aralkyl radicals and halogenated radicals of the afore-mentioned types, c is an integer equal to 1 to 3, inclusive, d is a whole number equal to 0 to 2 inclusive, e is a whole number equal to 0 to 3 inclusive, x is an integer equal to 1to 100 inclusive, y is a whole number equal to 0 to 198, inclusive, and the sum of x +y is equal to 1 to 199 inclusive, and f has a value between about 0.67 to about 67, while f/x has a value up to about 0.67.
Claim 3
Dependent Claim
16 words
A method in accordance with claim 1 where the platinum-vinylsiloxane is a platinum-vinyldisiloxane of the formula,
Claim 4
Dependent Claim
16 words
A method in accordance with claim 1, where the platinum-vinylsiloxane is a platinum-vinylcyclopolysiloxane of the formula,
Claim 5
Dependent Claim
81 words
A method in accordance with claim 2, where said silicon material containing per molecule, at least one hydrogen atom attached to silicon, is an organopolysiloxane polymer of the formula, HrZsSiO (4 r s)/2 ) Z is selected from monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon and cyanoalkyl radicals, r has a value equal to 0.0001 to 1 inclusive, s Has a value equal to 0 to 2.5 inclusive, and the sum of r and s is equal to 1 to 3 inclusive.
Claim 6
Dependent Claim
32 words
A method in accordance with claim 2, utilizing said platinum-disiloxane in a mixture of a polydimethylsiloxane having terminal dimethylvinylsiloxy units and copolymer composed of chemically combined SiO2 units and H (CH3)SiO units.
Claim 7
Dependent Claim
97 words
A method in accordance with claim 2, where said materials containing aliphatic carbon atoms linked by multiple bonds is an organopolysiloxane of the formula, (ZwYxSiO (4 w x)/2) YtZuSiO (4 t u)/2 Y is a monovalent aliphatically unsaturated radical selected from aliphatically unsaturated hydrocarbon radicals and halogenated aliphatically unsaturated radicals, Z is selected from monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon and cyanoalkyl radicals, u has a value equal to 0 to 2.5 inclusive, t has a value equal to 0.001 to 1 inclusive, and the sum of t and u is equal to 1 to 3 inclusive.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |