US4555531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid polyurethane foams employing alkylene oxide adducts of alkanolamines
Assignee: BASF Corp
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Filing: 1985-01-14
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Granted: 1985-11-26
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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 an alkanolamine, an alkylene oxide adduct of an alkanolamine, catalyst and blowing agent, and an organic polyisocyanate. The compositions are useful as insulation.
Inventors
- 👤 Donald L. Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/482; C08G18/50; C08G18/5021; C08G2110/00; C08G2110/0025; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A rigid polyurethane foam comprising the reaction product of (a) a polyoxyalkylene polyether polyol other than one derived from an alkanolamine, (b) an ethylene oxide-propylene oxide adduct of an alkanolamine having a molecular weight range from about 200 to about 500 and containing an amount of ethylene oxide from about 20 weight percent to about 96 weight percent, (c) catalyst, surfactant, blowing agent, and (d) an organic polyisocyanate.
Claim 2
Dependent Claim
68 words
A rigid polyurethane foam comprising the reaction product of (a) a polyoxyalkylene polyether polyol other than one derived from an alkanolamine, (b) an ethylene oxide-propylene oxide adduct of an alkanolamine having a molecular weight range from about 200 to about 500 and containing an amount of ethylene oxide from about 20 weight percent to about 96 weight percent, (c) catalyst, surfactant, blowing agent, and (d) an organic polyisocyanate.
Claim 3
Dependent Claim
21 words
The foam of claim 1 wherein the ratio of polyol to the adduct of alkanolamine is from about 2.5:1 to 1:1.5.
Claim 4
Dependent Claim
20 words
The foam of claim 1 wherein the ratio of polyol to the adduct of alkanolamine is from 2.5:1 to 1:1.
Claim 5
Dependent Claim
25 words
The foam of claim 1 wherein the adduct of the alkanolamine is selected from the group consisting of an adduct of ethanolamine, diethanolamine and triethanolamine.
Claim 6
Dependent Claim
13 words
The foam of claim 1 wherein the organic polyisocyanate is polymethylene polyphenylene polyisocyanate.
Claim 7
Dependent Claim
69 words
A process for preparing a rigid polyurethane foam comprising reacting (a) a polyoxyalkylene polyether polyol other than one derived from an alkanolamine, (b) an ethylene oxide-propylene oxide adduct of an alkanolamine having a molecular weight range from about 200 to about 500 and containing an amount of ethylene oxide from about 20 weight percent to about 96 weight percent, (c) catalyst, surfactant, blowing agent, and (d) an organic polyisocyanate.
Claim 8
Dependent Claim
69 words
A process for preparing a rigid polyurethane foam comprising reacting (a) a polyoxyalkylene polyether polyol other than one derived from an alkanolamine, (b) an ethylene oxide-propylene oxide adduct of an alkanolamine having a molecular weight range from about 200 to about 500 and containing an amount of ethylene oxide from about 20 weight percent to about 96 weight percent, (c) catalyst, surfactant, blowing agent, and (d) an organic polyisocyanate.
Claim 9
Dependent Claim
21 words
The process of claim 6 wherein the ratio of polyol to the adduct of alkanolamine is from about 2.5:1 to 1:1.5.
Claim 10
Dependent Claim
20 words
The process of claim 6 wherein the ratio of polyol to the adduct of alkanolamine is from 2.5:1 to 1:1.
Claim 11
Dependent Claim
25 words
The process of claim 6 wherein the adduct of the alkanolamine is selected from the group consisting of an adduct of ethanolamine, diethanolamine and triethanolamine.
Claim 12
Dependent Claim
13 words
The process of claim 6 wherein the organic polyisocyanate is polymethylene polyphenylene polyisocyanate.
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |