Patent US4335038A successfully refreshed from Google Patents.
US4335038A
Expired / Lapsed
US
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Polycarbonate containing a metal perfluoroborate and an organosilane as ignition depressants
Assignee: Dow Chemical Co
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Filing: 1980-09-26
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Granted: 1982-06-15
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Expires: 2000-09-26
Abstract
Abstract A polycarbonate such as a bisphenol-A homopolycarbonate containing amounts of a metal salt of perfluoroborate, e.g., the potassium salt of perfluoroborate and an organosilane, e.g., glycidoxypropyl trimethoxysilane, resists combustion upon exposure to a low temperature ignition source.
Inventors
- 👤 Lowell S. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:40
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/38; C08K5/00; C08K5/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A composition comprising a carbonate polymer having dispersed therein an alkali metal perfluoroborate and an organosilane wherein the alkali metal perfluoroborate is employed in an amount sufficient to retard combustion when the composition is exposed to a low temperature ignition source and the organosilane is employed in an amount sufficient to enhance the ability of the alkali metal perfluoroborate to reduce the combustibility of the composition.
Claim 2
Dependent Claim
66 words
A composition comprising a carbonate polymer having dispersed therein an alkali metal perfluoroborate and an organosilane wherein the alkali metal perfluoroborate is employed in an amount sufficient to retard combustion when the composition is exposed to a low temperature ignition source and the organosilane is employed in an amount sufficient to enhance the ability of the alkali metal perfluoroborate to reduce the combustibility of the composition.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the perfluoroborate is potassium perfluoroborate.
Claim 4
Dependent Claim
17 words
A composition comprising a carbonate polymer, an alkali metal perfluoroborate and either N-(2-aminoethyl)-3-aminopropyl trimethoxysilane or 3-(glycidoxy)propyl trimethoxysilane.
Claim 5
Dependent Claim
17 words
A composition comprising a carbonate polymer, an alkali metal perfluoroborate and either N-(2-aminoethyl)-3-aminopropyl trimethoxysilane or 3-(glycidoxy)propyl trimethoxysilane.
Claim 6
Dependent Claim
49 words
The composition of claim 1, 2 or 3 wherein the amount of perfluoroborate constitutes from about 0.001 to about 2 weight percent of the composition and the amount of an amino methoxy silane or glycidoxy methoxy silane constitutes from about 0.001 to about 2 weight percent of the composition.
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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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |