US4076654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a flame- and smoke-retarded, non-shrinkable, flexible polyurethane foam
Assignee: Bridgestone Corp
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Filing: 1976-10-20
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Granted: 1978-02-28
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Expires: 1996-10-20
Abstract
Abstract A flame- and smoke-retarded, non-shrinkable flexible polyurethane foam is prepared by reacting A. a polyol having at least two active hydrogen atoms and a molecular weight of from 1,000 to 10,000, B. a low molecular weight polyhydroxyl compound having a molecular weight of from 60 to 700, C. a polyisocyanate and D. an ammonium compound which generates ammonia gas at a temperature below 100° C, wherein the equivalent weight ratio of (B) to (A) is ranging from 0.5 to 2.0 and the amount of (D) based upon 100 parts by (A) ranges from 0.5 to 10 parts by weight.
Inventors
- 👤 Toshio Yukuta
- 👤 Takashi Ohashi
- 👤 Minoru Kojima
- 👤 Akira Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:50
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/166; C08G18/28; C08G18/2805; C08G18/285; C08G18/2865; C08J9/0004; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/32; C08K5/00; C08K5/04; C08K5/09; C08K5/16; C08K5/21; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/903
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
157 words
A process for producing a flame- and smoke-retarded, non-shrinkable, flexible polyurethane foam, which comprises reacting A. a polyol having at least two active hydrogen atoms and a molecular weight of from 1,000 to 10,000, B. a low molecular weight polyhydroxyl compound having a molecular weight of from 60 to 700, C. an organic polyisocyanate, and D. an ammonium compound which prevents shrinkage of said flexible polyurethane foam upon production, which generates ammonia gas at a temperature below 100° C and which decomposes at a temperature beneath the temperature of the reaction to provide said polyurethane foam, said ammonium compound also functioning as a catalyst for the reaction, wherein the equivalent weight ratio of the low molecular weight polyhydroxyl compound (B) to the polyol (A) is ranging from 0.5 to 2.0 and the amount of the ammonium compound (D) based on 100 parts by weight of the polyol (A) is ranging from 0.5 to 10 parts by weight.
Claim 2
Dependent Claim
157 words
A process for producing a flame- and smoke-retarded, non-shrinkable, flexible polyurethane foam, which comprises reacting A. a polyol having at least two active hydrogen atoms and a molecular weight of from 1,000 to 10,000, B. a low molecular weight polyhydroxyl compound having a molecular weight of from 60 to 700, C. an organic polyisocyanate, and D. an ammonium compound which prevents shrinkage of said flexible polyurethane foam upon production, which generates ammonia gas at a temperature below 100° C and which decomposes at a temperature beneath the temperature of the reaction to provide said polyurethane foam, said ammonium compound also functioning as a catalyst for the reaction, wherein the equivalent weight ratio of the low molecular weight polyhydroxyl compound (B) to the polyol (A) is ranging from 0.5 to 2.0 and the amount of the ammonium compound (D) based on 100 parts by weight of the polyol (A) is ranging from 0.5 to 10 parts by weight.
Claim 3
Dependent Claim
29 words
The process according to claim 1, in which the polyol (A) is at least one compound selected from the group consisting of polyether polyol, polyester polyol and polyetherester polyol.
Claim 4
Dependent Claim
22 words
The process according to claim 2, in which the polyether polyol is poly(oxyalkylene) polyol obtained by polymerizing alkylene oxide with polyhydric alcohol.
Claim 5
Dependent Claim
27 words
The process according to claim 3, in which the poly(oxyalkylene) polyol is at least one compound selected from the group consisting of poly(oxypropylene) triol and poly(oxyethylene-oxypropylene) triol.
Claim 6
Dependent Claim
19 words
The process according to claim 1, in which the low molecular weight polyhydroxyl compound (B) is an aliphatic alcohol.
Claim 7
Dependent Claim
63 words
The process according to claim 5, in which the aliphatic alcohol is at least one compound selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, butanediol, glycerin, trimethylolpropane, triethylolpropane, pentaerythritol, 1,2,6-hexanetriol, a polyol having a molecular weight of from 60 to 700 containing ether linkage and a polyol having a molecular weight of from 60 to 700 containing ester linkage.
Claim 8
Dependent Claim
30 words
The process according to claim 5, in which the aliphatic alcohol is at least one compound selected from the group consisting of monoethanolamine, diethanolamine, diisopropanolamine, triethanolamine, 2-amino-2-methyl-1,3-propanediol, tris(hydroxymethyl)aminomethane and N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine.
Claim 9
Dependent Claim
38 words
The process according to claim 1, in which the ammonium compound (D) is at least one compound selected from the group consisting of ammonium carbonate, ammonium hydrogencarbonate, ammonium carbamate, ammonium hydrogencarbonate carbamate, ammonium citrate and sodium ammonium hydrogenphosphate.
Claim 10
Dependent Claim
40 words
The process according to claim 1, in which the amount of the ammonium compound (D) to be used is within the range of from 1.0 to 5.0 parts by weight based on 100 parts by weight of the polyol (A).
Claim 11
Dependent Claim
15 words
The process of claim 1, wherein said polyurethane foam is free of any flame retardant.
Claim 12
Dependent Claim
16 words
The process of claim 1, which comprises reacting a system consisting of components (A) to (D).
Claim 13
Dependent Claim
32 words
The process according to claim 1, in which the low molecular weight polyhydroxyl compound (B) is at least one compound selected from the group consisting of trimethylolmelamine, hexamethylol melamine and tris(2-hydroxylethyl) isocyanurate.
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |