US4226947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible urethane foams having a low density and a method for producing said foams
Assignee: Bridgestone Corp
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Filing: 1978-10-24
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Granted: 1980-10-07
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Expires: 1998-10-24
Abstract
Abstract Flexible urethane foams having a low density and capable of preventing spontaneous combustion during production and storage are produced by compounding 5.0-12.0 parts by weight based on 100 parts by weight of polyhydroxylcompounds, of water and not less than 0.1 part by weight of aromatic amine antioxidant, further preferably not less than 0.01 part by weight of phosphorous acid triesters in the usual combination of polyhydroxyl compounds, polyisocyanates, water, catalysts, surfactants, foaming agent and other additives.
Inventors
- 👤 Toshio Yukuta
- 👤 Hiroya Fukuda
- 👤 Seiji Ishii
- 👤 Kazuo Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:24
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08G; C08G18/00; C08G18/06; C08G18/08; C08J9/0028; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
In a method for producing flexible urethane foams having a low density and capable of preventing spontaneous combustion during production and storage of flexible urethane foams by combining polyhydroxyl compounds, polyisocyanates, water, catalysts, surfactants, foaming agents and other additives, the improvement which comprises using 5.0-12.0 parts by weight of water based on 100 parts by weight of the polyhydroxyl compounds, and not less than 0.1 part by weight of aromatic amine antioxidants.
Claim 2
Dependent Claim
72 words
In a method for producing flexible urethane foams having a low density and capable of preventing spontaneous combustion during production and storage of flexible urethane foams by combining polyhydroxyl compounds, polyisocyanates, water, catalysts, surfactants, foaming agents and other additives, the improvement which comprises using 5.0-12.0 parts by weight of water based on 100 parts by weight of the polyhydroxyl compounds, and not less than 0.1 part by weight of aromatic amine antioxidants.
Claim 3
Dependent Claim
30 words
The method as claimed in claim 1, wherein not less than 0.01 part by weight of phosphorous acid triesters is added as an auxiliary component of the aromatic amine antioxidant.
Claim 4
Dependent Claim
30 words
The method as claimed in claim 1, wherein the aromatic amine antioxidant is at least one selected from the group consisting of diphenylamine, 4,4'-dioctyl-diphenylamine, 4,4'-bis(4-α,α-dimethylbenzyl)diphenylamine, phenyl-β-naphthylamine, N,N'-diphenyl-p-phenylenediamine, N-phenyl-N'-isopropyl-p-phenylenediamine and N,N'-di-β-naphthyl-p-phenylenediamine.
Claim 5
Dependent Claim
32 words
The method as claimed in claim 2, wherein the phosphorous acid triester is at least one selected from the group consisting of triphenyl phosphite, phenyl-di-isooctyl phosphite, phenyl-di-isodecyl phosphite, tris(isooctyl) phosphite, and tris(isodecyl)phosphite.
Claim 6
Dependent Claim
25 words
The method as claimed in claim 3, wherein the aromatic amine antioxidant is at least one selected from the group consisting of 4,4'-dioctyl-diphenylamine and 4,4'-bis(4-α,α-dimethylbenzyl)diphenylamine.
Claim 7
Dependent Claim
15 words
The method as claimed in claim 4, wherein the phosphorous acid triester is triphenyl phosphite.
Claim 8
Dependent Claim
30 words
The method as claimed in claim 1, wherein an amount of the aromatic amine antioxidant is 0.3-1.0 part by weight based on 100 parts by weight of the polyhydroxyl compound.
Claim 9
Dependent Claim
30 words
The method as claimed in claim 2, wherein the amount of the phosphorous acid triester is 0.2-0.3 part by weight based on 100 parts by weight of the polyhydroxyl compound.
Claim 10
Dependent Claim
72 words
Flexible urethane foams having a low density obtained by compounding and foaming polyhydroxyl compounds, polyisocyanates, water, catalysts, surfactants, foaming agents and other additives, the improvement which comprises the use of 5.0-12.0 parts by weight of water based on 100 parts by weight of the polyhydroxyl compounds, and not less than 0.1 part by weight of aromatic amine antioxidants in the foams to obtain urethane foams capable of preventing spontaneous combustion during storage.
Claim 11
Dependent Claim
72 words
Flexible urethane foams having a low density obtained by compounding and foaming polyhydroxyl compounds, polyisocyanates, water, catalysts, surfactants, foaming agents and other additives, the improvement which comprises the use of 5.0-12.0 parts by weight of water based on 100 parts by weight of the polyhydroxyl compounds, and not less than 0.1 part by weight of aromatic amine antioxidants in the foams to obtain urethane foams capable of preventing spontaneous combustion during storage.
Claim 12
Dependent Claim
31 words
The urethane foams as claimed in claim 9, wherein not less than 0.01 part by weight of phosphorous acid triesters is added as an auxiliary component of the aromatic amine antioxidant.
References Cited (Backward Citations)
US4052345A
Cited
US4010211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |