Patent US3050708A successfully refreshed from Google Patents.
US5166115A
Expired / Lapsed
US
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Polyurethanes
Assignee: Albemarle Corp
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Filing: 1992-02-03
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Granted: 1992-11-24
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Expires: 2012-02-03
Abstract
Abstract Novel polyurethane-urea foams having superior tear and tensile strengths, elongation and load-bearing are prepared by reacting an alkylthio-substituted aromatic diamine in a mixture of polyols with an aromatic diisocyanate or aromatic diisocyanate prepolymer or mixtures thereof, having free NCO content of 0.1-50% by weight. These foams have good dynamic properties that make them attractive as cushioning materials.
Inventors
- 👤 William R. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/3868; C08G18/6552; C08G18/6558; C08G18/657; C08G18/6688; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A flexible, low density polyurethane-foam composition having improved tear and tensile strengths, elongation and load-bearing comprising the reaction product of an aromatic diisocyanate or aromatic diisocyanate prepolymer with a mixture of: (a) 3,5-di(methylthio)-2,6-diaminotoluene, 3,5-di(methylthio)-2,4-diaminotoluene 1,3 methylthio-2,6-diaminotoluene and 1,3,5-triethylthio-2,6 diaminotoluene admixtures as the sole diamines, said alkylthio substituted aromatic diamines having a suitable reaction rate in the foaming process; (b) at least one polyol selected from a group consisting of polyalkene ether polyol, polymer polyol and mixtures thereof; (c) a blowing agent or mixtures of blowing agents; (d) a glycol amine cell stabilizer selected from the group consisting of monoethanol amine and diethanol amine, (e) an organosilicone stabilizer; and (f) a reaction promotor or mixtures thereof selected from a group of conventional organometallic, tertiary amine and tertiary amine salt catalysts.
Claim 2
Dependent Claim
129 words
A flexible, low density polyurethane-foam composition having improved tear and tensile strengths, elongation and load-bearing comprising the reaction product of an aromatic diisocyanate or aromatic diisocyanate prepolymer with a mixture of: (a) 3,5-di(methylthio)-2,6-diaminotoluene, 3,5-di(methylthio)-2,4-diaminotoluene 1,3 methylthio-2,6-diaminotoluene and 1,3,5-triethylthio-2,6 diaminotoluene admixtures as the sole diamines, said alkylthio substituted aromatic diamines having a suitable reaction rate in the foaming process; (b) at least one polyol selected from a group consisting of polyalkene ether polyol, polymer polyol and mixtures thereof; (c) a blowing agent or mixtures of blowing agents; (d) a glycol amine cell stabilizer selected from the group consisting of monoethanol amine and diethanol amine, (e) an organosilicone stabilizer; and (f) a reaction promotor or mixtures thereof selected from a group of conventional organometallic, tertiary amine and tertiary amine salt catalysts.
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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |