US4291129A
Expired / Lapsed
US
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Composition and a method for controlling reaction pressures during the foaming process resulting in an easily flame retarded foam-in place insulation
Assignee: CREHAN PATRICK JAMES
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Filing: 1980-06-25
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Granted: 1981-09-22
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Expires: 2000-06-25
Abstract
Abstract A low reactive pressure flame-retardant polyurethane foam made by reacting together a polymeric isocyanate, a polyol, an aqueous solution of a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, and a flame retardant. A blowing agent may be present.
Inventors
- 👤 Richard B. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08J9/0014; C08J9/0038; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
40 words
A low reactive pressure flame-retardant polyurethane foam made by reacting together a polymeric isocyanate, a conventional polyol, a surfactant, a blowing agent and an aqueous solution of a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, and flame retardant.
Claim 2
Dependent Claim
40 words
A low reactive pressure flame-retardant polyurethane foam made by reacting together a polymeric isocyanate, a conventional polyol, a surfactant, a blowing agent and an aqueous solution of a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, and flame retardant.
Claim 3
Dependent Claim
24 words
The polyurethane foam according to claim 1 wherein the carbohydrate is selected from the group consisting of cornstarch, corn syrup, dextrose, sucrose, and molasses.
Claim 4
Dependent Claim
12 words
The polyurethane foam according to claim 2 wherein the carbohydrate is cornstarch.
Claim 5
Dependent Claim
13 words
The polyurethane foam according to claim 2 wherein the carbohydrate is corn syrup.
Claim 6
Dependent Claim
22 words
The polyurethane foam according to claim 1 including a hypochlorite salt selected from the group consisting of calcium hypochlorite and sodium hypochlorite.
Claim 7
Dependent Claim
40 words
The polyurethane foam according to claim 1 wherein the flame retardant is selected from the group consisting of sodium chloride, calcium chloride, alkali metal borates, tri-cresyl phosphate, tris(2-chloroethyl) phosphate, tris(chloropropyl) phosphate, O,O-diethyl-N,N-bis-(2-hydroxyethyl) aminomethyl phosphate, antimony oxide, alumina, and antimony oxychloride.
Claim 8
Dependent Claim
25 words
The polyurethane foam according to claim 1 wherein the blowing agent is selected from the group consisting of methylene chloride, ethylenetrichloride, trichloromonofluoromethane, dichlorodefluoromethane, and dichlorotetrafluoroethane.
Claim 9
Dependent Claim
10 words
The polyurethane foam according to claim 1 including a catalyst.
Claim 10
Independent Claim
84 words
A method for making a flame-retardant polyurethane foam comprising: a. dissolving a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, surfactant, and a flame retardant selected from the group consisting of sodium chloride, calcium chloride, alkali metal borates, tri-cresyl phosphate, tris(2-chloroethyl phospate), tris(chloropropyl)phosphonate, O,O-diethyl-N,N-bis-(2-hydroxyethyl)aminomethyl phosphate, antimony oxide, alumina, and antimony oxychloride, to form an aqueous solution; b. mixing the aqueous solution with a polyether polyol; c. adding to the polyol-aqueous solution mixture a polymer isocyanate and mixing. d. allowing the mixture to foam.
Claim 11
Independent Claim
84 words
A method for making a flame-retardant polyurethane foam comprising: a. dissolving a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, surfactant, and a flame retardant selected from the group consisting of sodium chloride, calcium chloride, alkali metal borates, tri-cresyl phosphate, tris(2-chloroethyl phospate), tris(chloropropyl)phosphonate, O,O-diethyl-N,N-bis-(2-hydroxyethyl)aminomethyl phosphate, antimony oxide, alumina, and antimony oxychloride, to form an aqueous solution; b. mixing the aqueous solution with a polyether polyol; c. adding to the polyol-aqueous solution mixture a polymer isocyanate and mixing. d. allowing the mixture to foam.
Claim 12
Dependent Claim
22 words
The method of claim 9 wherein the carbohydrate is selected from the group consisting of cornstarch, corn syrup, dextrose, sucrose and molasses.
Claim 13
Dependent Claim
10 words
The method of claim 10 wherein the carbohydrate is cornstarch.
Claim 14
Dependent Claim
11 words
The method of claim 10 wherein the carbohydrate is corn syrup.
Claim 15
Dependent Claim
16 words
The method of claim 9 wherein a blowing agent is added to the polyol-aqueous solution mixture.
Claim 16
Dependent Claim
17 words
The method of claim 9 wherein a catalyst is present in the aqueous solution of step (a).
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |