US3883451A
Expired / Lapsed
US
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Flame-retardant poly (aryloxyphosphazene) copolymers
Assignee: Horizons Inc
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Filing: 1973-06-11
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Granted: 1975-05-13
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Expires: 1993-06-11
Abstract
Abstract Poly(aryloxyphosphazene) copolymers which consist of the units which occur in a nonregular fashion and are represented by the following general formulas: WHEREIN R1 and R2 each represents an aryl or substituted aryl radical, R1 and R2 being different, and R2 being substituted with at least one halogen (chlorine or bromine), the polymers possessing excellent flame retardancy, and improved processability as compared with prior art aryloxyphosphazene homopolymers are described.
Inventors
- 👤 Kennard A Reynard
- 👤 Selwyn H Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:33
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
16 words
POLY(ARYLOXYPHOSPHAZENE) COPOLYMERS CONSISTING OF 20 TO 50,000 RANDOMLY REPEATING UNITS REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 2
Dependent Claim
16 words
POLY(ARYLOXYPHOSPHAZENE) COPOLYMERS CONSISTING OF 20 TO 50,000 RANDOMLY REPEATING UNITS REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 3
Dependent Claim
21 words
The copolymer of claim 1 wherein R2 is a substituted phenyl group which contains at least the 4-Cl or 4-Br substituent.
Claim 4
Dependent Claim
13 words
The copolymer of claim 1 wherein R1 is phenyl and R2 is 2,4-Cl2C6H3-.
Claim 5
Dependent Claim
14 words
The copolymer of claim 1 wherein R1 is 4-ClC6 H4- and R2 is 2,4-Cl2C6H3-.
Claim 6
Dependent Claim
16 words
The copolymers of claim 1 in which R1 is 3- or 4-CH3C6H4- and R2 is 2,4-Cl2C6H3-.
Claim 7
Dependent Claim
21 words
The copolymer of claim 1 wherein R1 is phenyl and R2 is 3- or 4-QC6H4-, and Q is Cl,Br or CH3.
Claim 8
Dependent Claim
14 words
The copolymer of claim 1 wherein R1 is phenyl and R2 is 2,4, 5-Cl3C6H2-.
Claim 9
Dependent Claim
13 words
The copolymer of claim 1 wherein R1 is phenyl and R2 is Cl5C6-.
Claim 10
Dependent Claim
32 words
A process where poly(dichlorophosphazene) and the alkali metal salts of phenol and a substituted phenol, or the salts of two substituted phenols are reacted at temperatures of below room temperature to 200*C.
Claim 11
Dependent Claim
32 words
A process where poly(dichlorophosphazene) and the alkali metal salts of phenol and a substituted phenol, or the salts of two substituted phenols are reacted at temperatures of below room temperature to 200*C.
Claim 12
Dependent Claim
11 words
Shaped compositions and films obtained from the polymers of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |