US4061606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphosphazene polymer/organic polymer foams
Assignee: Armstrong World Industries Inc
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Filing: 1976-12-27
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Granted: 1977-12-06
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Expires: 1996-12-27
Abstract
Abstract This invention relates to blends of polyphosphazenes and organic polymers. The blends of this invention can be formed into coatings, sheets or films or into flexible or semi-rigid foams. The blends are extremely fire retardant and produce low smoke loads, or essentially no smoke, when heated in an open flame.
Inventors
- 👤 Ronald Lee Dieck
- 👤 Edwin John Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08L; C08L85/00; C08L85/02; C08J2385/00; C08J2385/02; C08J2485/00; Y; Y10; Y10S; Y10S521/00; Y10S521/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A foamed blend comprising: A. a polyphosphazene comprising randomly distributed repeating units represented by the formulas: ##STR5## wherein R 1 and R 2 are the same or different and are hydrogen, a C 1 - C 10 linear or branched alkyl radical, or a C 1 - C 4 linear or branched alkoxy radical subtituted on any sterically permissible position on the phenoxy group, B. a foamable compatible organic polymer, C. said polymer (A) being present in an amount of about 15% to about 85% by weight and said polymer (B) being present in an amount of about 85% to about 15% by weight based on the combination of (A) and (B).
Claim 2
Dependent Claim
112 words
A foamed blend comprising: A. a polyphosphazene comprising randomly distributed repeating units represented by the formulas: ##STR5## wherein R 1 and R 2 are the same or different and are hydrogen, a C 1 - C 10 linear or branched alkyl radical, or a C 1 - C 4 linear or branched alkoxy radical subtituted on any sterically permissible position on the phenoxy group, B. a foamable compatible organic polymer, C. said polymer (A) being present in an amount of about 15% to about 85% by weight and said polymer (B) being present in an amount of about 85% to about 15% by weight based on the combination of (A) and (B).
Claim 3
Dependent Claim
15 words
A foamed blend, as in claim 1, where the organic polymer is a vulcanizable elastomer.
Claim 4
Dependent Claim
17 words
A foamed blend, as in claim 1, where the organic polymer is a thermoplastic non-elastomeric organic polymer.
Claim 5
Dependent Claim
15 words
A foamed blend, as in claim 1, where the organic polymer is an unsaturated polyester.
Claim 6
Dependent Claim
33 words
A foamed blend, as in claim 1, where the polyphosphazene (A) (1) has randomly distributed repeating units represented by the formulas: ##STR6## where W is a substituent capable of a crosslinking chemical reaction.
Claim 7
Dependent Claim
15 words
A foamed blend, as in claim 5, where the organic polymer is a vulcanizable elastomer.
Claim 8
Dependent Claim
17 words
A foamed blend, as in claim 5, where the organic polymer is a thermoplastic non-elastomeric organic polymer.
Claim 9
Dependent Claim
15 words
A foamed blend, as in claim 5, where the organic polymer is an unsaturated polyester.
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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |