US4391935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1981-05-04
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Granted: 1983-07-05
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Expires: 2001-05-04
Abstract
Abstract An improved flame retardant polycarbonate composition of an aromatic carbonate polymer in admixture with an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof, which composition has in admixture therewith a fluorinated polyolefin.
Inventors
- 👤 Charles A. Bialous
- 👤 John B. Luce
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08L; C08L69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A composition meeting UL-94 V o requirements consisting essentially of (1) a non-halogenated aromatic polycarbonate, (2) a flame retardant effective amount of an alkali metal or alkaline earth metal salt of an organic acid of the group unsubstituted monomeric or polymeric aromatic sulfonic acids, monomeric or polymeric aromatic sulfonesulfonic acids, sulfonic acids of aromatic ketones, heterocyclic sulfonic acids, halogenated non-aromatic carboxylic acids, sulfonic acids of aromatic sulfides, monomeric or polymeric aromatic ether sulfonic acids, aliphatic and olefinic sulfonic acids, monomeric or polymeric phenol ester sulfonic acids, unsubstituted or halogenated oxocarbon acids, sulfonic acids of monomeric and polymeric aromatic carboxylic acids and esters, halocycloaliphatic aromatic sulfonic acids, monomeric or polymeric aromatic amide sulfonic acids, monomeric or polymeric aromatic sulfonic acids, (3) and a non-dripping effective amount of an ASTM Type 3 polytetrafluoroethylene.
Claim 2
Dependent Claim
131 words
A composition meeting UL-94 V o requirements consisting essentially of (1) a non-halogenated aromatic polycarbonate, (2) a flame retardant effective amount of an alkali metal or alkaline earth metal salt of an organic acid of the group unsubstituted monomeric or polymeric aromatic sulfonic acids, monomeric or polymeric aromatic sulfonesulfonic acids, sulfonic acids of aromatic ketones, heterocyclic sulfonic acids, halogenated non-aromatic carboxylic acids, sulfonic acids of aromatic sulfides, monomeric or polymeric aromatic ether sulfonic acids, aliphatic and olefinic sulfonic acids, monomeric or polymeric phenol ester sulfonic acids, unsubstituted or halogenated oxocarbon acids, sulfonic acids of monomeric and polymeric aromatic carboxylic acids and esters, halocycloaliphatic aromatic sulfonic acids, monomeric or polymeric aromatic amide sulfonic acids, monomeric or polymeric aromatic sulfonic acids, (3) and a non-dripping effective amount of an ASTM Type 3 polytetrafluoroethylene.
Claim 3
Dependent Claim
33 words
The composition in accordance with claim 1 wherein the polytetrafluoroethylene is present in an amount of from about 0.01 to about 2.0 weight percent based on the total weight of the polycarbonate composition.
Claim 4
Dependent Claim
13 words
The composition in accordance with claim 1 wherein the salt is sodium 2,4,5-trichlorobenzenesulfonate.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |