US4153595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1977-09-09
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Granted: 1979-05-08
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Expires: 1997-09-09
Abstract
Abstract A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the alkaline earth metal salts of halogenated methanesulfonic acids or mixtures thereof, or mixtures of the alkali metal salts and the alkaline earth metal salts.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and 0.01 to about 10.0 weight percent based on the weight of the aromatic carbonate polymer of a metal salt of a halogenated (F, Cl, Br) methanesulfonic acid wherein said metal salt is selected from the group consisting of the alkaline earth metal salts selected from calcium, strontium or barium or mixtures thereof, or mixtures of said alkaline earth metal salts and alkali metal salts in which there is not less than one part of akaline earth metal salt for each two parts of alkali metal salt.
Claim 2
Dependent Claim
101 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and 0.01 to about 10.0 weight percent based on the weight of the aromatic carbonate polymer of a metal salt of a halogenated (F, Cl, Br) methanesulfonic acid wherein said metal salt is selected from the group consisting of the alkaline earth metal salts selected from calcium, strontium or barium or mixtures thereof, or mixtures of said alkaline earth metal salts and alkali metal salts in which there is not less than one part of akaline earth metal salt for each two parts of alkali metal salt.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said metal salt is an alkaline earth metal salt selected from calcium, strontium or barium.
Claim 4
Dependent Claim
14 words
The composition of claim 2 wherein said alkaline earth metal salt is calcium trifluoromethanesulfonate.
Claim 5
Dependent Claim
14 words
The composition of claim 2 wherein said alkaline earth metal salt is strontium trifluoromethanesulfonate.
Claim 6
Dependent Claim
14 words
The composition of claim 2 wherein said alkaline earth metal salt is barium trifluoromethanesulfonate.
Claim 7
Dependent Claim
14 words
The composition of claim 2 wherein said alkaline earth metal salt is calcium chloromethanesulfonate.
Claim 8
Dependent Claim
23 words
The composition of claim 1 wherein said metal salt is a mixture of said alkaline earth metal salt and an alkali metal salt.
Claim 9
Dependent Claim
19 words
The composition of claim 7 wherein said metal salt mixture is a mixture of calcium trifluoromethanesulfonate and sodium trifluoromethanesulfonate.
Claim 10
Dependent Claim
19 words
The composition of claim 7 wherein said metal salt mixture is a mixture of calcium trifluoromethanesulfonate and potassium trifluoromethanesulfonate.
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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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |