US3909490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polycarbonate composition
Assignee: General Electric Co
•
Filing: 1973-12-28
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Granted: 1975-09-30
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Expires: 1993-12-28
Abstract
Abstract A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the metal salts of sulfonic acids of aromatic sulfides.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:25
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A FLAME RETARDANT AROMATIC CARBONATE POLYMER COMPOSITION COMPRISING IN ADMIXTURE AN AROMATIC CARBONATE POLYMER AND A MINOR AMOUNT OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF THE METAL SALTS OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF AROMATIC SULFIDES, AND MIXTURES THEREOF, WHEREIN SAID METAL SALTS ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND MIXTURES OF THESE METAL SALTS, AND SAID SUBSTITUENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF AROMATIC SULFIDES IS SELECTED FROM THE GROUP CONSISTING OF ELECTRON WITHDRAWING RADICALS AND MIXTURES OF ELECTRON WITHDRAWING RADICALS.
Claim 2
Dependent Claim
96 words
A FLAME RETARDANT AROMATIC CARBONATE POLYMER COMPOSITION COMPRISING IN ADMIXTURE AN AROMATIC CARBONATE POLYMER AND A MINOR AMOUNT OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF THE METAL SALTS OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF AROMATIC SULFIDES, AND MIXTURES THEREOF, WHEREIN SAID METAL SALTS ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND MIXTURES OF THESE METAL SALTS, AND SAID SUBSTITUENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF AROMATIC SULFIDES IS SELECTED FROM THE GROUP CONSISTING OF ELECTRON WITHDRAWING RADICALS AND MIXTURES OF ELECTRON WITHDRAWING RADICALS.
Claim 3
Dependent Claim
88 words
The composition of claim 1 wherein the metal salt of tHe substituted and unsubstituted sulfonic acids of aromatic sulfides have the following formula: R''(S)1-2R''''(SO3M)1-6(X)0-11 wherein R'' and R'''' are independently selected from the group consisting of aryl radicals of 1-2 aromatic rings and an aliphatic radical of 1-6 carbon atoms, provided, however, that R'' and R'''' must contain at least one aromatic radical, and wherein M is a metal selected from the group consisting of alkali metals and alkaline earth metals and X is an electron withdrawing radical.
Claim 4
Dependent Claim
26 words
The composition of claim 2 wherein the electron withdrawing radical is selected from the group consisting of halo-, nitro-, trihalomethyl- and cyano- radicals and mixtures thereof.
Claim 5
Dependent Claim
9 words
The composition of claim 2 wherein X is chlorine.
Claim 6
Dependent Claim
17 words
The composition of claim 2 wherein R'' and R'''' are aryl radicals of one aromatic ring each.
Claim 7
Dependent Claim
9 words
The composition of claim 2 wherein M is calcium.
Claim 8
Dependent Claim
11 words
The composition of claim 2 wherein the composition is sodium 4''-dichlorodiphenylsulfide-3-sulfonate.
Claim 9
Dependent Claim
10 words
The composition of claim 2 wherein the composition is sodium-2-nitrothianthrene-5-sulfonate.
Claim 10
Dependent Claim
11 words
The composition of claim 2 wherein the composition is disodium diphenylsulfide-4,4''-disulfonate.
References Cited (Backward Citations)
US3475372A
Cited
US3775367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |