Patent US3867341A successfully refreshed from Google Patents.
US3867341A
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US
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Metal 8-hydroxyquinolate complexes as stabilizers for poly(phosphazenes) to inhibit thermal degradation at elevated temperatures
Assignee: Bridgestone Firestone Inc
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Filing: 1973-09-28
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Granted: 1975-02-18
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Expires: 1993-09-28
Abstract
Abstract Stabilization of polyphosphazenes against thermal degradation is acheived by the incorporation of organometallic compounds, particularly metal complexes of 8-hydroxyquinolates or other metal complexes in such phosphazene polymers.
Inventors
- 👤 Gary Stephen Kyker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:18
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/062; C07F9/065; C07F9/067; C08; C08K; C08K5/00; C08K5/56
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A POLYPHOSPHAZENE COMPOSITION STABLIZED AGAINST THERMAL AGING COMPRISING A POLYPHOSPHAZENE REPRESENTED BY THE GENERAL FORMULA: -(P(-X)(-X'')=N)NWHEREIN N REPRESENTS AN INTEGER FROM 3 UP TO ABOUT 50,000 AND X AND X'' EACH REPRESENT A MONOVALENT SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF ALKOXY, SUBSTITUTED ALKOXY, ARYLOXU, SUBSTITUTED ARYLOXY, HYDROXY AND AMINO, AND X AND X'' ARE RADOMLY DISTRIBUTED ALONG THE -P-N- BACKBONE AND THE POLYPHOSPHAZENE INCLUDES ONE OR TWO OR MORE RADOMLY DISTRIBUTED GROUPS AND AN ORGANOMETALLIC COMPOUND COMPATIBLE WITH SAID POLYPHOSPHAZENE AND PRESENT IN AN AMOUNT SUFFICIENT TO STABILIZED SAID POLYPHOSPHAZENE AGAINST THERMAL DEGRADATION, SAID ORGANOMETALLIC COMPOUND BEING A METAL 8HYDROXYQUINOLATE.
Claim 2
Dependent Claim
101 words
A POLYPHOSPHAZENE COMPOSITION STABLIZED AGAINST THERMAL AGING COMPRISING A POLYPHOSPHAZENE REPRESENTED BY THE GENERAL FORMULA: -(P(-X)(-X'')=N)NWHEREIN N REPRESENTS AN INTEGER FROM 3 UP TO ABOUT 50,000 AND X AND X'' EACH REPRESENT A MONOVALENT SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF ALKOXY, SUBSTITUTED ALKOXY, ARYLOXU, SUBSTITUTED ARYLOXY, HYDROXY AND AMINO, AND X AND X'' ARE RADOMLY DISTRIBUTED ALONG THE -P-N- BACKBONE AND THE POLYPHOSPHAZENE INCLUDES ONE OR TWO OR MORE RADOMLY DISTRIBUTED GROUPS AND AN ORGANOMETALLIC COMPOUND COMPATIBLE WITH SAID POLYPHOSPHAZENE AND PRESENT IN AN AMOUNT SUFFICIENT TO STABILIZED SAID POLYPHOSPHAZENE AGAINST THERMAL DEGRADATION, SAID ORGANOMETALLIC COMPOUND BEING A METAL 8HYDROXYQUINOLATE.
Claim 3
Dependent Claim
27 words
Polyphosphazenes according to claim 1, wherein the metal is selected from the group consisting of alkali metals, alkaline earth metals including Mg, and Al, Zn and Cr.
Claim 4
Dependent Claim
19 words
Polyphosphazenes according to claim 1, wherein the stabilizer is present in an amount between 0.05 and 5.0% by weight.
Claim 5
Dependent Claim
15 words
The stabilized polyphosphazenes of claim 1, wherein X and X'' are fluoroalkoxy or fluoroaryloxy groups.
Claim 6
Dependent Claim
10 words
Elastomers consisting essentially of the stabilized polyphosphazenes of claim 1.
Claim 7
Dependent Claim
10 words
Plastics consisting essentially of the stabilized polyphosphazenes of claim 1.
Claim 8
Dependent Claim
11 words
Thermoplastic elastomers consisting essentially of the stabilized polyphosphazenes of claim 1.
Claim 9
Dependent Claim
10 words
Fibers consisting essentially of the stabilized polyphosphazenes of claim 1.
Claim 10
Dependent Claim
11 words
Vulcanized articles consisting essentially of the stabilized polyphosphazenes of claim 1.
References Cited (Backward Citations)
US2586312A
Cited
US3272773A
Cited
US3515688A
Cited
US3474052A
Cited
US3700629A
Cited
US3766157A
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |