Patent US3943077A successfully refreshed from Google Patents.
US3943077A
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Fire retardant polyurethane foams
Assignee: Owens Corning
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Filing: 1975-01-06
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Granted: 1976-03-09
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Expires: 1995-01-06
Abstract
Abstract Flame retardant polyurethane foams are disclosed. Flame resistance is achieved by a combination of at least three polyols. Control of internal exotherm is achieved by the addition to the foams of an inorganic material such as hydrated alumina.
Inventors
- 👤 Reuben H. Bell
- 👤 Russell M. Boardway, Jr.
- 👤 Francis D. Thomson
- 👤 Donald C. Wysocki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/546; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C08G18/4009; C08G18/4027; C08G18/42; C08G18/46; C08G18/4607; C08G79/00; C08G79/02; C08G79/04; C08G2110/00; C08G2110/0025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A polyol composition of at least 3 polyols comprising the following materials in parts by weight: oxyalkylated, resole-based polyol
20 to 45
ester-containing polyol 10 to 35
bis (2-hydroxyethyl)
aminomethylphosphonate 2 to 15 wherein the oxyalkylated, resole-based polyol is a reaction product of an alkylene oxide and a resole formed, under basic conditions, of 2.4 to 2.8 moles of formaldehyde and 1 mole of phenol and the ester containing polyol is a tetrabromophthalic anhydride based polyol prepared from tetrabromophthalic anhydride and a condensation product of propylene oxide and pentaery-thritol.
Claim 2
Dependent Claim
89 words
A polyol composition of at least 3 polyols comprising the following materials in parts by weight: oxyalkylated, resole-based polyol
20 to 45
ester-containing polyol 10 to 35
bis (2-hydroxyethyl)
aminomethylphosphonate 2 to 15 wherein the oxyalkylated, resole-based polyol is a reaction product of an alkylene oxide and a resole formed, under basic conditions, of 2.4 to 2.8 moles of formaldehyde and 1 mole of phenol and the ester containing polyol is a tetrabromophthalic anhydride based polyol prepared from tetrabromophthalic anhydride and a condensation product of propylene oxide and pentaery-thritol.
Claim 3
Dependent Claim
35 words
A polyol composition according to claim 1 wherein the parts by weight of each of the materials is: oxyalkylated, resole-based polyol
28 to 38
ester-containing polyol 18 to 28
bis (2-hydroxyethyl)
aminomethylphosphonate 4 to 10.
Claim 4
Dependent Claim
36 words
A polyol composition according to claim 1 wherein the ester containing polyol is prepared from 464 parts of tetrabromophthalic anhydride, one part of tri-n-butylamine, and 400 parts of a condensation product of propylene oxide and pentaery-thritol.
Claim 5
Dependent Claim
155 words
A rigid, low density polyurethane foam composition having a flame spread index less than 25 in an ASTM E-84 Tunnel test formed by reacting one or more compounds having reactive --NCO groups with one or more polyols having reactive --OH groups in the presence of a catalyst, surfactant, fire retardant, and blowing agent, in an NCO/OH index ranging from 1/1 to 5/4; wherein the polyols are a mixture of at least 3 polyols comprising the following materials in part by weight: oxyalkylated, resole-based polyol
20 to 45
ester-containing polyol 10 to 35
bis (2-hydroxyethyl)
aminomethylphosphonate 2 to 15 wherein the oxyalkylated resole-based polyol is a reaction product of an alkylene oxide and a resole formed, under basic conditions, of 2.4 to 2.8 moles of formaldehyde and 1 mole of phenol and wherein the ester containing polyol is a tetrabromophthalic anhydride based polyol prepared from tetrabromophthalic anhydride and a condensation product of propylene oxide and pentaery-thritol.
Claim 6
Dependent Claim
155 words
A rigid, low density polyurethane foam composition having a flame spread index less than 25 in an ASTM E-84 Tunnel test formed by reacting one or more compounds having reactive --NCO groups with one or more polyols having reactive --OH groups in the presence of a catalyst, surfactant, fire retardant, and blowing agent, in an NCO/OH index ranging from 1/1 to 5/4; wherein the polyols are a mixture of at least 3 polyols comprising the following materials in part by weight: oxyalkylated, resole-based polyol
20 to 45
ester-containing polyol 10 to 35
bis (2-hydroxyethyl)
aminomethylphosphonate 2 to 15 wherein the oxyalkylated resole-based polyol is a reaction product of an alkylene oxide and a resole formed, under basic conditions, of 2.4 to 2.8 moles of formaldehyde and 1 mole of phenol and wherein the ester containing polyol is a tetrabromophthalic anhydride based polyol prepared from tetrabromophthalic anhydride and a condensation product of propylene oxide and pentaery-thritol.
Claim 7
Dependent Claim
35 words
A composition according to claim 4 wherein the parts, by weight, of each of the polyol materials is: oxyalkylated, resole-based polyol
28 to 38
ester-containing polyol 18 to 28
bis (2-hydroxyethyl)
aminomethylphosphonate 4 to 10.
Claim 8
Dependent Claim
35 words
A composition according to claim 4 wherein the ester containing polyol is prepared from 464 parts of tetrabromophthalic anhydride, one part of tri-n-butylamine, and 400 parts of a condensation product of propylene oxide and pentaery-thritol.
Claim 9
Dependent Claim
13 words
A composition according to claim 4 wherein NCO/OH index is greater than 1/1.
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |