Patent US4585807A successfully refreshed from Google Patents.
US4585807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid polyurethane foams employing oxyalkylated ethylenediamine
Assignee: BASF Corp
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Filing: 1985-01-14
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Granted: 1986-04-29
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Expires: 2005-01-14
Abstract
Abstract The invention relates to rigid polyurethane foams prepared by reacting a polyether polyol other than one derived from ethylenediamine, an alkylene oxide adduct of ethylenediamine, catalyst, surfactant, and blowing agent, and an organic polyisocyanate. The compositions are useful for producing insulation panels.
Inventors
- 👤 Donald L. Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6688; C08G2110/00; C08G2110/0025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A rigid polyurethane foam comprising the reaction product of (a) a polyoxyalkylene polyether polyol consisting of a propylene oxide adduct of sucrose and propylene glycol, (b) an ethylene oxide and/or propylene oxide adduct of ethylenediamine having a molecular weight range from about 200 to about 500, (c) catalyst, surfactant and blowing agent, and (d) polymethylene polyphenylene polyisocyanate.
Claim 2
Dependent Claim
57 words
A rigid polyurethane foam comprising the reaction product of (a) a polyoxyalkylene polyether polyol consisting of a propylene oxide adduct of sucrose and propylene glycol, (b) an ethylene oxide and/or propylene oxide adduct of ethylenediamine having a molecular weight range from about 200 to about 500, (c) catalyst, surfactant and blowing agent, and (d) polymethylene polyphenylene polyisocyanate.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein the ratio of polyol to the adduct of ethylenediamine is from about 2.5:1 to 1:1.5.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the ratio of polyol to the adduct of ethylenediamine is from 2.5:1 to 1:1.
Claim 5
Dependent Claim
57 words
A process for preparing a polyurethane composition comprising reacting (a) a polyoxyalkylene polyether polyol consisting of a propylene oxide adduct of sucrose and propylene glycol, (b) an ethylene oxide and/or propylene oxide adduct of ethylenediamine having a molecular weight range from about 200 to about 500, (c) catalyst, surfactant and blowing agent, and (d) polymethylene polyphenylene polyisocyanate.
Claim 6
Dependent Claim
57 words
A process for preparing a polyurethane composition comprising reacting (a) a polyoxyalkylene polyether polyol consisting of a propylene oxide adduct of sucrose and propylene glycol, (b) an ethylene oxide and/or propylene oxide adduct of ethylenediamine having a molecular weight range from about 200 to about 500, (c) catalyst, surfactant and blowing agent, and (d) polymethylene polyphenylene polyisocyanate.
Claim 7
Dependent Claim
21 words
The process of claim 4 wherein the ratio of polyol to the adduct of ethylenediamine is from about 2.5:1 to 1:1.5.
Claim 8
Dependent Claim
20 words
The process of claim 4 wherein the ratio of polyol to the adduct of ethylenediamine is from 2.5:1 to 1:1.
References Cited (Backward Citations)
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |