US4855328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing silicone foam density
Assignee: General Electric Co
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Filing: 1988-10-24
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Granted: 1989-08-08
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Expires: 2008-10-24
Abstract
Abstract Silicone foams having a reduced density can be made by cooling the foam components of vinyl-terminated polydiorganosiloxane, methylhydrogenpolysiloxane, hydroxylated material, such as water and platinum catalysts, and mixing and maintaining the foamable mixture at a temperature of less than 5° C.
Inventors
- 👤 Kennith A. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A method for lowering the density of silicone foams resulting from the interaction of ingredients in a foamable mixture comprising an (A) component comprising an effective amount of platinum catalyst, a hydroxylated material and a vinyl-terminated polydiorganosiloxane and a (B) component comprising an organohydrogen polysiloxane, which method comprises, (1) agitating a mixture of the (A) component and the (B) component at a temperature of -20° C. to 5° C., and (2) allowing the mixture of (1) to foam while the temperature of the mixture is maintained at -20° C. to 5° C.
Claim 2
Independent Claim
92 words
A method for lowering the density of silicone foams resulting from the interaction of ingredients in a foamable mixture comprising an (A) component comprising an effective amount of platinum catalyst, a hydroxylated material and a vinyl-terminated polydiorganosiloxane and a (B) component comprising an organohydrogen polysiloxane, which method comprises, (1) agitating a mixture of the (A) component and the (B) component at a temperature of -20° C. to 5° C., and (2) allowing the mixture of (1) to foam while the temperature of the mixture is maintained at -20° C. to 5° C.
Claim 3
Dependent Claim
17 words
A method in accordance with claim 1, where the vinyl terminated polydiorganosiloxane is a vinyl terminated polydimethylsiloxane.
Claim 4
Dependent Claim
18 words
A method in accordance with claim 1, where the hydroxylated material is a mixture of methanol and water.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 1, where the platinum catalyst is a platinum vinyldisiloxane.
Claim 6
Dependent Claim
16 words
A method in accordance with claim 1, where the cyclic hydride polysiloxane is a hydride cyclotetrasiloxane.
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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |