Patent US4458034A successfully refreshed from Google Patents.
US4458034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant, char-forming, flexible polyurethane foams
Assignee: WM T Burnett and Co Inc
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Filing: 1982-09-01
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Granted: 1984-07-03
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Expires: 2002-09-01
Abstract
Abstract Flame retardant, char-forming, flexible polyurethane foams are described which include, in addition to suitable diisocyanates and other basic foam-forming components, a flame retardant material and a polyol which has substantially non-reactive hydroxyl groups with respect to the diisocyanate component under the conditions of the foam-forming reaction. Accordingly, the polyol remains in the finished polyurethane foam substantially unreacted. When the finished foam product is subjected to combustion conditions the flame retardant material and unreacted polyol combine to retard flame formation and to provide a dripless char. In addition to the flame retardant and char-forming characteristics, the flexible polyurethane foam is firm, permitting the manufacture of clickable foams.
Inventors
- 👤 Roland N. Fracalossi
- 👤 Mark T. Wajer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
111 words
A flexible polyurethane foam comprising the foam-forming reaction product of water as a foaming agent, a reactive polyol and a diisocyanate and including uniformly contained in said foam a flame retardant agent and an unreacted polyol having the empirical formula of (C 6 H 10 O 5 ) X wherein X is in excess of about 60 and containing hydroxyl groups substantially unreacted with said diisocyanate, said water being present in an amount sufficient to provide a flexible foam, and said flame retardant agent and unreacted polyol being present in an amount sufficient to inhibit flaming and to form a substantially dripless char when said foam is subjected to combustion temperatures.
Claim 2
Dependent Claim
111 words
A flexible polyurethane foam comprising the foam-forming reaction product of water as a foaming agent, a reactive polyol and a diisocyanate and including uniformly contained in said foam a flame retardant agent and an unreacted polyol having the empirical formula of (C 6 H 10 O 5 ) X wherein X is in excess of about 60 and containing hydroxyl groups substantially unreacted with said diisocyanate, said water being present in an amount sufficient to provide a flexible foam, and said flame retardant agent and unreacted polyol being present in an amount sufficient to inhibit flaming and to form a substantially dripless char when said foam is subjected to combustion temperatures.
Claim 3
Dependent Claim
15 words
The foam of claim 1 wherein said unreacted polyol is present as small, solid particles.
Claim 4
Dependent Claim
11 words
The foam of claim 1 wherein said unreacted polyol is starch.
Claim 5
Dependent Claim
11 words
The foam of claim 1 wherein said unreacted polyol is cellulose.
Claim 6
Dependent Claim
15 words
The foam of claim 1 wherein said flame retardant agent is a phosphorus containing compound.
Claim 7
Dependent Claim
17 words
The foam of claim 1 wherein said flame retardant agent is a chlorine or bromine containing compound.
Claim 8
Dependent Claim
18 words
The foam of claim 1 wherein the reactive polyol is a polyether and said diisocyanate is toluene diisocyanate.
Claim 9
Dependent Claim
18 words
The foam of claim 1 wherein the reactive polyol is a polyester and said diisocyanate is toluene diisocyanate.
Claim 10
Independent Claim
143 words
The method of forming a flame retardant and dripless char-forming flexible polyurethane foam comprising admixing a foam-forming formulation including water as a foam agent, a reactive polyol, diisocyanate, a flame retardant agent, and an unreactive polyol having the empirical formula of (C 6 H 10 O 5 ) X wherein X is in excess of about 60 and containing a plurality of hydroxyl groups substantially non-reactive with said diisocyanate under foam-forming conditions; subjecting said foam-forming formulation to foaming conditions to form a flexible polyurethane foam having said flame retardant agent and unreacted polyol uniformly contained in said foam, said water being present in an amount sufficient to provide a flexible foam, and said flame retardant agent and unreacted polyol being present in an amount sufficient to inhibit flaming and to form a substantially dripless char when said foam is subjected to combustion temperatures.
Claim 11
Independent Claim
143 words
The method of forming a flame retardant and dripless char-forming flexible polyurethane foam comprising admixing a foam-forming formulation including water as a foam agent, a reactive polyol, diisocyanate, a flame retardant agent, and an unreactive polyol having the empirical formula of (C 6 H 10 O 5 ) X wherein X is in excess of about 60 and containing a plurality of hydroxyl groups substantially non-reactive with said diisocyanate under foam-forming conditions; subjecting said foam-forming formulation to foaming conditions to form a flexible polyurethane foam having said flame retardant agent and unreacted polyol uniformly contained in said foam, said water being present in an amount sufficient to provide a flexible foam, and said flame retardant agent and unreacted polyol being present in an amount sufficient to inhibit flaming and to form a substantially dripless char when said foam is subjected to combustion temperatures.
Claim 12
Dependent Claim
24 words
The method of claim 9 wherein said polyol is a solid and is present in said foam after the foam-forming reaction as small particles.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein said flame retardant agent is a phosphorus containing compound.
Claim 14
Dependent Claim
17 words
The method of claim 9 wherein said flame retardant agent is a chlorine or bromine containing compound.
Claim 15
Dependent Claim
18 words
The method of claim 9 wherein the reactive polyol is a polyether and said diisocyanate is toluene diisocyanate.
Claim 16
Dependent Claim
18 words
The method of claim 9 wherein the reactive polyol is a polyester and said diisocyanate is toluene diisocyanate.
Claim 17
Dependent Claim
11 words
The method of claim 9 wherein said unreacted polyol is starch.
Claim 18
Dependent Claim
11 words
The method of claim 9 wherein said unreacted polyol is cellulose.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |