Patent US4803999A successfully refreshed from Google Patents.
US3856712A
Expired / Lapsed
US
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Poly(alkoxyaryloxyphosphazene) elastomers
Assignee: Horizons Inc
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Filing: 1973-06-11
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Granted: 1974-12-24
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Expires: 1993-06-11
Abstract
Abstract Polyphosphazene copolymers which are elastomers and have one alkoxy and one aryloxy substituent are described. These inexpensive elastomers have improved thermal stability over poly(alkoxyphosphazene) elastomers and improved low temperature properties over poly(aryloxyphosphazene) elastomers.
Inventors
- 👤 K Reynard
- 👤 S Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:37
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
19 words
POLYPHOSPHAZENE COPOLYMERS CONSISTING OF REACTING UNITS WHICH ARE DISTRIBUTED IN A NONREGULAR FASHION AND ARE REPRESENTED BY THE FORMULAS:
Claim 2
Dependent Claim
19 words
POLYPHOSPHAZENE COPOLYMERS CONSISTING OF REACTING UNITS WHICH ARE DISTRIBUTED IN A NONREGULAR FASHION AND ARE REPRESENTED BY THE FORMULAS:
Claim 3
Dependent Claim
15 words
The copolymers of claim 1 where Z is 4halo-C6H4- and halo is Cl or Br.
Claim 4
Dependent Claim
9 words
The copolymers of claim 1 where Z is 4-Cl-3-CH3C6H3-.
Claim 5
Dependent Claim
13 words
The copolymers of claim 1 where Y is CH3- and Z is C6H5-.
Claim 6
Dependent Claim
13 words
The copolymers of claim 1 where Y is C2H5- and Z is C6H5-.
Claim 7
Dependent Claim
19 words
The copolymers of claim 1 where Y is n-C5H11 and Z is QC6H4-and Q is H, Cl, or CH3.
Claim 8
Dependent Claim
13 words
The copolymers of claim 1 where Y is CH3- and Z is Cl2C6H3-.
Claim 9
Dependent Claim
38 words
The process for the preparation of the copolymers of claim 1 in which poly(dichlorophosphazene) is reacted with alkali metal salts of an alcohol, and phenol or a substituted phenol, at temperatures between below room temperature and 200 C.
Claim 10
Dependent Claim
57 words
A process for the preparation of the soluble, high molecular weight polymers of claim 1 which comprises reaction of (Cl2PN)n polymer with an alkali metal salt of YOH at 20*-130*C followed by reaction of this product with an alkali metal salt of ZOH at 20*-140*C when Y and Z and n are as defined in claim 1.
Claim 11
Dependent Claim
11 words
Shaped articles and films prepared from the copolymers of claim 1.
References Cited (Backward Citations)
US3370020A
Cited
US3702833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |