US3867320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant densified polyurethane foam
Assignee: ER Carpenter Co
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Filing: 1974-02-04
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Granted: 1975-02-18
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Expires: 1994-02-04
Abstract
Abstract Flame retardant properties are imparted to polyurethane foam using a substantially reduced level of selected flame retardant additives. This result is achieved through permanent compressive densification of the foam.
Inventors
- 👤 Mario A Gambardella
- 👤 Frank S Natoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:34
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08J9/36; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
A PERMANENTLY COMPRESSION-DENSIFIED, FLAME RETARDANT, SUBSTANTIALLY OPEN-CELL, FLEXIBLE POLYURETHANE FOAM PREPARED FROM A FOAM FORMING REACTION MIXTURE COMPRISED OF A POLYOL, AN ORGANIC POLYSIOCYANATE, A FOAMING AGENT, A REACTION CATALYST, AND, PER EVERY 100 PARTS BY WEIGHT OF SAID POLYOL, FROM ABOUT 2 TO ABOUT 4.5 PARTS OF A FLAME RETARDANT ADDITIVE HAVING THE FORMULA
Claim 2
Dependent Claim
55 words
A PERMANENTLY COMPRESSION-DENSIFIED, FLAME RETARDANT, SUBSTANTIALLY OPEN-CELL, FLEXIBLE POLYURETHANE FOAM PREPARED FROM A FOAM FORMING REACTION MIXTURE COMPRISED OF A POLYOL, AN ORGANIC POLYSIOCYANATE, A FOAMING AGENT, A REACTION CATALYST, AND, PER EVERY 100 PARTS BY WEIGHT OF SAID POLYOL, FROM ABOUT 2 TO ABOUT 4.5 PARTS OF A FLAME RETARDANT ADDITIVE HAVING THE FORMULA
Claim 3
Dependent Claim
9 words
A polyether polyurethane foam as claimed in claim 1.
Claim 4
Dependent Claim
20 words
The polyurethane foam of claim 2 wherein said flame retardant additive is tetrakis (2-chloroethyl) ethylene diphosphate or 2,2-bis(2-chloroethyl)-1,3-propylene-bis (bis(2-chloroethyl) phosphate).
Claim 5
Dependent Claim
28 words
The polyurethane foam of claim 3 wherein said polyol is an oxyalkylated polyhydric alcohol having a molecular weight of about 1,000-6,000 and said organic polyisocyanate is toluene diisocyanate.
Claim 6
Dependent Claim
29 words
The polyurethane foam of claim 4 wherein said polyol is oxypropylated glycerin and said reaction mixture comprises water and a catalyst mixture of an amine and a stannous salt.
Claim 7
Dependent Claim
14 words
The polyurethane foam of claim 2 wherein said flame retardant additive has the formula
Claim 8
Dependent Claim
17 words
The polyurethane foam of claim 6 wherein each of said R and R'' contains 1-4 carbon atoms.
Claim 9
Dependent Claim
26 words
The polyurethane foam of claim 7 wherein about 2-4.5 parts of said flame retardant additive are employed per every 100 parts by weight of said polyol.
Claim 10
Dependent Claim
28 words
The polyurethane foam of claim 8 wherein said polyol is an oxyalkylated polyhydric alcohol having a molecular weight of about 1,000-6,000 and said organic polyisocyanate is toluene diisocyanate.
Claim 11
Dependent Claim
15 words
The polyurethane foam of claim 9 wherein said flame retardant additive is tetrakis(2-chloroethyl) ethylene diphosphate.
Claim 12
Dependent Claim
25 words
The polyurethane foam of claim 10 wherein said reaction mixture comprises oxypropylated glycerin, water, and a catalyst mixture of an amine and a stannous salt.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |