US4139501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyurethane foam of reduced tendency to form embers when burned
Assignee: GFC FOAM Corp A CORP OF DE
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Filing: 1977-10-19
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Granted: 1979-02-13
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Expires: 1997-10-19
Abstract
Abstract Flexible polyurethane foam having reduced tendency to form burning embers when it is ignited and burned is provided by incorporating into the reaction mixture before foaming a derivative of melamine wherein one or more hydrogens have been replaced by hydroxymethyl and/or lower alkoxymethyl groups. In one embodiment, flexible polyurethane foams of increased flame retardance are also provided, by also incorporating a halogenated phosphorus ester into the reaction mixture before foaming.
Inventors
- 👤 Bernard Rudner
- 👤 Thomas M. Noone
- 👤 Peter D. Pauly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3842; C08G18/3851
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
168 words
In a process for the manufacture of a flexible, resilient, polyurethane foam by the reaction of a polyol and an organic polyisocyanate in the presence of a blowing agent, the amount of said organic polyisocyanate being at least one equivalent per equivalent of the total of said polyol and said blowing agent, the step of incorporating into the mixture to be foamed at least one compund of the formula ##STR2## in amount sufficient to reduce the formation of incendiary embers when the foam is burned, in the preceding formula A, B, D, E, F and G being selected from the group consisting of hydrogen, methylol and ROCH 2 --wherein R is an alkyl radical containing from one to four carbon atoms, with the proviso that in said formula at least one of A, B, D, E, F and G is methylol or ROCH 2 --, and wherein the amount of said compound is from one to about 20 percent by weight based upon the weight of said polyol.
Claim 2
Dependent Claim
168 words
In a process for the manufacture of a flexible, resilient, polyurethane foam by the reaction of a polyol and an organic polyisocyanate in the presence of a blowing agent, the amount of said organic polyisocyanate being at least one equivalent per equivalent of the total of said polyol and said blowing agent, the step of incorporating into the mixture to be foamed at least one compund of the formula ##STR2## in amount sufficient to reduce the formation of incendiary embers when the foam is burned, in the preceding formula A, B, D, E, F and G being selected from the group consisting of hydrogen, methylol and ROCH 2 --wherein R is an alkyl radical containing from one to four carbon atoms, with the proviso that in said formula at least one of A, B, D, E, F and G is methylol or ROCH 2 --, and wherein the amount of said compound is from one to about 20 percent by weight based upon the weight of said polyol.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said compound is tris-(hydroxymethyl) melamine.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said compound is tris-(hydroxymethyl)-tris-(methoxymethyl) melamine.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said compound is hexa-(methoxymethyl) melamine.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein the mixture to be foamed also includes at least one halogenated phosphorus ester in amount sufficient to increase the flame retardant properties of the foam.
Claim 7
Dependent Claim
28 words
The process of claim 5 wherein the amount of said halogenated phosphorus ester is from four to twenty percent by weight, based upon the weight of the polyol.
Claim 8
Dependent Claim
13 words
The process of claim 5 wherein said halogenated phosphorus ester is tris-(2-chloroethyl) phosphate.
Claim 9
Dependent Claim
13 words
The process of claim 5 wherein said halogenated phosphorus ester is tris-(1,3-dichloropropyl) phosphate.
Claim 10
Dependent Claim
8 words
The product of the process of claim 1.
Claim 11
Dependent Claim
8 words
The product of the process of claim 2.
Claim 12
Dependent Claim
8 words
The product of the process of claim 3.
Claim 13
Dependent Claim
8 words
The product of the process of claim 4.
Claim 14
Dependent Claim
8 words
The product of the process of claim 5.
Claim 15
Dependent Claim
8 words
The product of the process of claim 6.
Claim 16
Dependent Claim
8 words
The product of the process of claim 7.
Claim 17
Dependent Claim
8 words
The product of the process of claim 8.
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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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |