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US4288345A
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Platinum complex
Assignee: General Electric Co
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Filing: 1980-02-06
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Granted: 1981-09-08
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Expires: 2000-02-06
Abstract
Abstract Platinum complexes of unsaturated siloxanes, substantially free of inorganic halogen and inhibitory compounds, provide superior hydrosilation catalysts when the unsaturated siloxane comprises, per gram-atom of platinum, (i) a combination of one mole of (CH 2 ═CH)((R) 2 Si) 2 O, and one mole of (CH 2 ═CH) (R) 2 SiOSi(R 2 )OH; (ii) two moles of (CH 2 ═CH)((R) 2 Si) 2 O; or (iii) a mixture of (i) and (ii), wherein R is free of aliphatic unsaturation and is selected from alkyl, cycloalkyl, and aryl groups.
Inventors
- 👤 Bruce A. Ashby
- 👤 Frank J. Modic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:30
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2291; B01J31/02; B01J31/12; B01J31/123; B01J31/124; B01J31/1608; C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0086; C08; C08L; C08L83/00; C08L83/04; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/828; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A platinum-siloxane complex catalyst, substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR5## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR6## (iii) a combination of (i) and (ii); wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 2
Dependent Claim
77 words
A platinum-siloxane complex catalyst, substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR5## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR6## (iii) a combination of (i) and (ii); wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 3
Dependent Claim
12 words
A complex catalyst as defined in claim 1 wherein R is methyl.
Claim 4
Dependent Claim
21 words
A complex catalyst as defined in claim 1 wherein, in said combination (iii), component (ii) comprises a minor proportion by weight.
Claim 5
Dependent Claim
115 words
A curable composition comprising (a) an organosilicon compound containing at least one ═SiH bond; (b) an organic compound containing an aliphatic unsaturated group, a hydroxyl group, or a mixture of such groups; and (c) a catalytic amount of a platinum-siloxane complex catalyst substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR7## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR8## (iii) a combination of (i) and (ii); wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 6
Dependent Claim
115 words
A curable composition comprising (a) an organosilicon compound containing at least one ═SiH bond; (b) an organic compound containing an aliphatic unsaturated group, a hydroxyl group, or a mixture of such groups; and (c) a catalytic amount of a platinum-siloxane complex catalyst substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR7## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR8## (iii) a combination of (i) and (ii); wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 7
Dependent Claim
13 words
A composition as defined in claim 4 wherein component (a) is an organohydrogenpolysiloxane.
Claim 8
Dependent Claim
33 words
A composition as defined in claim 4 wherein component (b) is an organosilicon compound containing at least one silicon-bonded aliphatic unsaturated group, or an organosilicon compound containing at least one silicon-bonded hydroxyl group.
Claim 9
Dependent Claim
19 words
A composition as defined in claim 6 wherein said component (b) comprises a vinyl-terminated polydimethylsiloxane or a hydroxy-terminated polydimethylsiloxane.
Claim 10
Dependent Claim
16 words
A composition as defined in claim 4 wherein, in said complex catalyst (c), R is methyl.
Claim 11
Dependent Claim
18 words
A composition as defined in claim 4 wherein said complex catalyst (c) comprises predominantly that defined under (i).
Claim 12
Dependent Claim
24 words
A composition as defined in claim 4 wherein said complex catalyst (c) consists essentially of that defined under (i) and wherein R is methyl.
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |