US3993607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke-suppressant and fire-retardant poly(vinyl chloride) compositions
Assignee: Armstrong World Industries Inc
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Filing: 1974-05-09
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Granted: 1976-11-23
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Expires: 1994-05-09
Abstract
Abstract The propensity of poly(vinyl chloride) homopolymer and poly(vinyl chloride) copolymer resin-containing compositions including poly(vinyl chloride) modified rubbers to smoke on exposure to fire is greatly diminished by the addition of effective amounts of ferric oxide. Amounts in excess of about 5%, based on the weight of the poly(vinyl chloride) resin or poly(vinyl chloride) modified resin or rubber, act as an effective smoke suppressant. Additionally, the combination of ferric oxide with hydrated metallic compounds results in poly(vinyl chloride) homopolymer and copolymer-containing compositions having both low smoke and low flame spread characteristics.
Inventors
- 👤 David M. Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
A resin composition containing a poly(vinyl chloride) homopolymer or copolymer, wherein the copolymer contains a major portion of vinyl chloride and, as a smoke suppressant and fire retardant, between about 5.0 and 75 parts by weight Fe 2 O 3 and between about 5.0 and 200 parts by weight of a hydrated magnesium carbonate containing a high degree of hydration per one hundred parts resin.
Claim 2
Dependent Claim
65 words
A resin composition containing a poly(vinyl chloride) homopolymer or copolymer, wherein the copolymer contains a major portion of vinyl chloride and, as a smoke suppressant and fire retardant, between about 5.0 and 75 parts by weight Fe 2 O 3 and between about 5.0 and 200 parts by weight of a hydrated magnesium carbonate containing a high degree of hydration per one hundred parts resin.
Claim 3
Dependent Claim
19 words
The resin composition of claim 1 wherein the resin component consists essentially of plasticized poly(vinyl chloride) homopolymer or copolymer.
Claim 4
Dependent Claim
30 words
The resin composition of claim 1 wherein the resin is a poly(vinyl chloride) modified rubber composition which has been compounded with said Fe 2 O 3 and hydrated magnesium carbonate.
Claim 5
Dependent Claim
17 words
The resin composition of claim 3 wherein said resin is a cellular poly(vinyl chloride) modified acrylonitrilebutadiene rubber.
References Cited (Backward Citations)
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US3418267A
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US3468839A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |