US3919167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polycarbonate composition
Assignee: General Electric Co
•
Filing: 1973-12-28
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Granted: 1975-11-11
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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 heterocyclic sulfonic acids.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A FLAME RETARDANT AROMATIC POLYMER COMPOSITION COMPRISING IN ADMIXTURE AN AROMATIC CARBONATE POLYMER AND A MINOR AMOUNT OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTIING OF THE METAL SALTS OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF HETEROCYCLIC COMPOUNDS, AND MIXTURES THEREOF, WHEREIN SAID METAL SALTS THEREOF ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND MIXTURES OF THE METAL SALTS, AND WHEREIN SAID SUBSTITUENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF HETEROCYCLIC COMPOUNDS IS SELECTED FROM THE GROUP CONSISTING OF AN ELECTRON WITHDRAWING RADICAL AND MIXTURES OF ELECTRON WITHDRAWING RADICALS, AND WHEREIN SAID HETEROCYCLIC COMPPUND IS SELECTED FROM THE GROUP CONSISTING OF FIVE AND SIX MEMBERED HETEROCYCLIC NUCLEI CONTAINING A HETERO ATOM SELECTED FROM THE GORUP CONSISTING OF NITROGEN, OXYGEN, AND SULFUR.
Claim 2
Dependent Claim
130 words
A FLAME RETARDANT AROMATIC POLYMER COMPOSITION COMPRISING IN ADMIXTURE AN AROMATIC CARBONATE POLYMER AND A MINOR AMOUNT OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTIING OF THE METAL SALTS OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF HETEROCYCLIC COMPOUNDS, AND MIXTURES THEREOF, WHEREIN SAID METAL SALTS THEREOF ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND MIXTURES OF THE METAL SALTS, AND WHEREIN SAID SUBSTITUENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF HETEROCYCLIC COMPOUNDS IS SELECTED FROM THE GROUP CONSISTING OF AN ELECTRON WITHDRAWING RADICAL AND MIXTURES OF ELECTRON WITHDRAWING RADICALS, AND WHEREIN SAID HETEROCYCLIC COMPPUND IS SELECTED FROM THE GROUP CONSISTING OF FIVE AND SIX MEMBERED HETEROCYCLIC NUCLEI CONTAINING A HETERO ATOM SELECTED FROM THE GORUP CONSISTING OF NITROGEN, OXYGEN, AND SULFUR.
Claim 3
Dependent Claim
65 words
The composition of claim 1 wherein the metal salts of substituted and unsubstituted sulfonic acids of heterocyclic compounds has the following formula: XO 15R(SO3M)1 6 wherein X is an electron withdrawing radical and M is a metal selected from the group consisting of alkali metal and alkaline earth metal and R is an organic nucleus selected from the group of organic heterocyclic nuclei consisting of:
Claim 4
Dependent Claim
26 words
The composition of claim 1 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
11 words
The composition of claim 2 wherein the composition is sodium 2,5-dichlorothiophene-3-sulfonate.
Claim 6
Dependent Claim
11 words
The composition of claim 2 wherein the composition is sodium 2,6-dichloropyridine-3-sulfonate.
Claim 7
Dependent Claim
11 words
The composition of claim 2 wherein the composition is disodium indigo-5,5''-disulfonate.
Claim 8
Dependent Claim
13 words
The composition of claim 2 wherein the composition is tetrasodium copper phthalocyanine tetrasulfonate.
Claim 9
Dependent Claim
11 words
The composition of claim 2 wherein the composition is calcium 2,5-dichlorothiophene-3-sulfonate.
References Cited (Backward Citations)
US3535300A
Cited
US3775367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |