Patent US4189543A successfully refreshed from Google Patents.
US4189543A
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Catalyst for making polyurethanes
Assignee: Dow Chemical Co
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Filing: 1978-08-21
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Granted: 1980-02-19
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Expires: 1998-08-21
Abstract
Abstract Compounds of formulas I and II are heat-activated catalysts used in making polyurethanes. ##STR1## wherein R, R 1 , and R 2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion. Upon heating, Compounds I and II catalyze the reaction and may release gaseous by-products which cause the resulting polyurethane compound to foam. For example, the catalyst, t-butyl imidazole-N-carboxylate, when heated to 120° C., catalyzes the reaction between a polyol and a polyisocyanate to give a foamed polyurethane which cured in 16 minutes.
Inventors
- 👤 George A. Doorakian
- 👤 Lawrence G. Duquette
- 👤 Philip W. McGraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2027; C08G18/166; C08G18/168
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A process for preparing a polyurethane comprising reacting (a) an organic compound bearing more than one reactive isocyanato group; and (b) an organic compound bearing more than one alcoholic hydroxyl group; in the presence of (c) a catalyst to catalyze the reaction between (a) and (b) at elevated temperatures; said catalyst corresponding to the formula ##STR14## wherein R, R 1 , and R 2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion.
Claim 2
Dependent Claim
91 words
A process for preparing a polyurethane comprising reacting (a) an organic compound bearing more than one reactive isocyanato group; and (b) an organic compound bearing more than one alcoholic hydroxyl group; in the presence of (c) a catalyst to catalyze the reaction between (a) and (b) at elevated temperatures; said catalyst corresponding to the formula ##STR14## wherein R, R 1 , and R 2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion.
Claim 3
Dependent Claim
19 words
The process defined by claim 1, in which (a) is an organic polyisocyanate and (b) is an aliphatic polyol.
Claim 4
Dependent Claim
17 words
The process defined by claim 2, in which (b) is a polyether polyol or a polyester polyol.
Claim 5
Dependent Claim
22 words
The process defined by claim 1, in which R 3 and R 4 are each independently lower alkyl or phenol substituted compounds.
Claim 6
Dependent Claim
15 words
The process defined by claim 3, in which R 3 is ethyl, isopropyl, or benzyl.
Claim 7
Dependent Claim
22 words
The process defined by claim 5, in which R, R 1 , and R 2 are each H or CH 3 .
Claim 8
Dependent Claim
22 words
The process defined by claim 4, in which R 4 is methyl, ethyl, i-propyl, or t-butyl and HX is an adipic acid.
Claim 9
Dependent Claim
32 words
The process defined by claim 1, in which (a) is a toluene diisocyanate, (b) is a polyoxyalkylene triol and glycol mixture, and (c) is t-butyl imidazole-N-carboxylate at a temperature of 120° C.
Claim 10
Dependent Claim
90 words
A composition foamable in the presence of a blowing agent at elevated temperatures comprising (a) an organic compound bearing more than one reactive isocyanato group; (b) an organic compound bearing more than one alcoholic hydroxyl group; and (c) a catalyst to catalyze the reaction between (a) and (b), said catalyst corresponding to the formula ##STR15## wherein R, R 1 , and R 2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion.
Claim 11
Dependent Claim
90 words
A composition foamable in the presence of a blowing agent at elevated temperatures comprising (a) an organic compound bearing more than one reactive isocyanato group; (b) an organic compound bearing more than one alcoholic hydroxyl group; and (c) a catalyst to catalyze the reaction between (a) and (b), said catalyst corresponding to the formula ##STR15## wherein R, R 1 , and R 2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion.
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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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |