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US4404121A
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Process for preparing polyol-catalyst mixtures useful in the preparation of rigid polyurethane cellular products
Assignee: Dow Chemical Co
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Filing: 1981-12-30
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Granted: 1983-09-13
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Expires: 2001-12-30
Abstract
Abstract Polyol-catalyst mixtures, useful in the preparation of rigid polyurethane cellular products, are prepared simultaneously by reacting a Mannich base compound, water, and an epoxide and subsequently removing the water from the reaction mixture. Also provided are new rigid polyurethane cellular products having a high content of isocyanurate linkages, superior heat distortion temperatures and improved insulating properties, which products are obtained by reacting a polyisocyanate with the aforementioned polyol-catalyst mixture.
Inventors
- 👤 Howard P. Klein
- 👤 George P. Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:57
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0205; B01J31/0208; B01J31/0234; B01J31/0235; B01J31/0237; B01J31/06; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G18/28; C08G18/40; C08G18/54; C08G18/546; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2115/00; C08G2115/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A process for preparing polyol-catalyst mixtures useful in the preparaton of rigid polyurethane cellular products which comprises heating a Mannich base compound with water and an epoxide and subsequently removing the water from the reaction mixture, said Mannich base compound being the reaction product of a phenol, an alkanolamine and formaldehyde.
Claim 2
Dependent Claim
51 words
A process for preparing polyol-catalyst mixtures useful in the preparaton of rigid polyurethane cellular products which comprises heating a Mannich base compound with water and an epoxide and subsequently removing the water from the reaction mixture, said Mannich base compound being the reaction product of a phenol, an alkanolamine and formaldehyde.
Claim 3
Dependent Claim
20 words
A process as in claim 1 wherein the Mannich base is a reaction product of an alkylphenol, dialkanolamine and formaldehyde.
Claim 4
Dependent Claim
13 words
A process as in claim 1 wherein the epoxide is an alkylene oxide.
Claim 5
Dependent Claim
27 words
A process as in claim 1 wherein the epoxide is an alkylene oxide of the group consisting of ethylene oxide, propylene oxide, butylene oxide and amylene oxide.
Claim 6
Dependent Claim
34 words
A process as in claim 1 wherein the Mannich base is the reaction product of a phenol, an alkanolamine and formaldehyde wherein the components are utilized in a ratio varying from 1:1:1 to 3:3:3.
Claim 7
Dependent Claim
11 words
A process as in claim 1 wherein the alkanolamine is diisopropanolamine.
Claim 8
Dependent Claim
11 words
A process as in claim 1 wherein the phenol is nonylphenol.
Claim 9
Dependent Claim
67 words
A process for preparing a polyol-catalyst mixture for use in the preparation of rigid polyurethane cellular products which comprises reacting a Mannich base compound with water and alkylene oxide at a temperature between 50° C. and 150° C. until the desired polyol-catalyst mixture has been formed and then stripping out the water, said Mannich base compound being the reaction product of a phenol, an alkanolamine and formaldehyde.
Claim 10
Dependent Claim
67 words
A process for preparing a polyol-catalyst mixture for use in the preparation of rigid polyurethane cellular products which comprises reacting a Mannich base compound with water and alkylene oxide at a temperature between 50° C. and 150° C. until the desired polyol-catalyst mixture has been formed and then stripping out the water, said Mannich base compound being the reaction product of a phenol, an alkanolamine and formaldehyde.
Claim 11
Dependent Claim
10 words
A polyol-catalyst mixture prepared by the process of claim 1.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |