US4851452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing silicone foam density and silicone foam compositions
Assignee: General Electric Co
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Filing: 1988-08-01
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Granted: 1989-07-25
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Expires: 2008-08-01
Abstract
Abstract A method is provided for reducing the density of silicone foam from a platinum catalyzed foamable two-package mixture of vinyl organosiloxane, organohydrogen siloxane, and hydroxylated material. The platinum catalyst used in the foamable mixture is in the form of a mixture of a platinum vinyl siloxane and a platinum triarylphosphine. A platinum catalyst mixture of platinum vinylsiloxane and triarylphosphine also has been found effective.
Inventors
- 👤 David C. Gross
- 👤 Larry N. Lewis
- 👤 Connie L. Haig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; C08G77/22; C08G77/24; C08G77/70; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A method for making silicone foam having a reduced foam density comprising agitating a mixture of ingredients comprising by weight (A) 100 parts of a vinyl-terminated polydiorganosiloxane, (B) 0.5 to 50 parts of a hydride polysiloxane, (C) 0.2 to 10 parts of a hydroxylated material, and (D) an effective amount of a platinum catalyst consisting essentially of (i) platinum vinyl siloxane complex, and (ii) a member selected from a platinum triarylphosphine and a triarylphosphine, where there is present in the platinum catalyst, per part by weight of platinum of the platinum vinyl siloxane complex, from 0.2 to 4 parts of platinum of the platinum triarylphosphine or 0.2 to 3 parts of the triarylphosphine.
Claim 2
Independent Claim
113 words
A method for making silicone foam having a reduced foam density comprising agitating a mixture of ingredients comprising by weight (A) 100 parts of a vinyl-terminated polydiorganosiloxane, (B) 0.5 to 50 parts of a hydride polysiloxane, (C) 0.2 to 10 parts of a hydroxylated material, and (D) an effective amount of a platinum catalyst consisting essentially of (i) platinum vinyl siloxane complex, and (ii) a member selected from a platinum triarylphosphine and a triarylphosphine, where there is present in the platinum catalyst, per part by weight of platinum of the platinum vinyl siloxane complex, from 0.2 to 4 parts of platinum of the platinum triarylphosphine or 0.2 to 3 parts of the triarylphosphine.
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) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |