Patent US3926908A successfully refreshed from Google Patents.
US3926908A
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Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1973-12-28
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Granted: 1975-12-16
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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 ketones.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 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 SALT OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF AROMATIC KETONES AND MIXTURES THEREOF WHEREIN SAID METAL SALTS THEREOF ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALLKALINE EARTH METALS, AND MIXTURES OF THESE METAL SALTS, AND SAID SUBSTITUTENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF AROMATIC KETONES IS SELECTED FROM THE GROUPS CONSISTING OF AN ELECTRON WITHDRAWING RADICAL AND MIXTURES OF ELECTRON WITHDRAWING RADICALS.
Claim 2
Dependent Claim
98 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 SALT OF SUBSTITUTED AND UNSUBSTITUTED SULFONIC ACIDS OF AROMATIC KETONES AND MIXTURES THEREOF WHEREIN SAID METAL SALTS THEREOF ARE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALLKALINE EARTH METALS, AND MIXTURES OF THESE METAL SALTS, AND SAID SUBSTITUTENT ON THE METAL SALT OF THE SUBSTITUTED SULFONIC ACIDS OF AROMATIC KETONES IS SELECTED FROM THE GROUPS CONSISTING OF AN ELECTRON WITHDRAWING RADICAL AND MIXTURES OF ELECTRON WITHDRAWING RADICALS.
Claim 3
Dependent Claim
89 words
The composition in claim 1 wherein the metal salt of the substituted and unsubstituted sulfonic acids of aromatic ketones has the following formula: R''(CO)1 2R''''(SO3M)1 6(X)O 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 providing, however, that R'' and R'''' must contain at least one aromatic radical, 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
25 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
11 words
The composition of claim 2 wherein the composition is disodium benzophenone-3,3''-disulfonate.
Claim 7
Dependent Claim
11 words
The composition of claim 2 wherein the composition is disodium 4,4''-dichlorobenzophenone-3,3''-disulfonate.
Claim 8
Dependent Claim
11 words
The composition of claim 2 wherein the composition is dipotassium anthraquinone-2,6-disulfonate.
Claim 9
Dependent Claim
12 words
The composition of claim 2 wherein the composition is strontium 2,3-dichloronaphthoquinone sulfonate.
References Cited (Backward Citations)
US3775367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |