US4500654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst system and process for the production of polyurethanes
Assignee: Air Products and Chemicals Inc
•
Filing: 1983-11-01
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Granted: 1985-02-19
•
Expires: 2003-11-01
Abstract
Abstract A catalyst and process are provided for producing polyurethanes by contacting an organic polyol and an organic isocyanate with a catalyst comprising an N-substituted alkoxyalkyl piperazine and preferably additionally comprising an N-alkoxyalkyl morpholine wherein the alkylene moieties of the morpholine and piperazine are independently selected from the group consisting of C 1 to about C 5 alkylene moieties, and wherein the alkoxy moieties are independently selected from the group consisting of C 1 to about C 3 alkoxy moieties.
Inventors
- 👤 Russell O. Carlsen
- 👤 Francois M. Casati
- 👤 Daniel S. Raden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2027
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
26 words
A catalyst for use in reacting an organic isocyanate with an organic polyol to produce a polyurethane, the catalyst comprising an at least mono-N-substituted alkoxyalkyl piperazine.
Claim 2
Dependent Claim
26 words
A catalyst for use in reacting an organic isocyanate with an organic polyol to produce a polyurethane, the catalyst comprising an at least mono-N-substituted alkoxyalkyl piperazine.
Claim 3
Dependent Claim
83 words
The catalyst of claim 1 wherein the alkoxyalkyl piperazine is an N-alkoxyalkyl piperazine generally described by the formula: ##STR3## wherein: Y is selected from the group consisting of (a) hydrogen; (b) alkyl groups having 1 to about 5 carbon atoms; and (c) the moiety generally described by the formula: R'"--O--R"-- R and R" are independently selected from alkylene groups having 1 to about 5 carbon atoms; and R' and R'" are independently selected from alkyl groups having 1 to about 3 carbon atoms.
Claim 4
Dependent Claim
18 words
The catalyst of claim 2 wherein Y is an alkyl group with 1 to about 3 carbon atoms.
Claim 5
Dependent Claim
25 words
The catalyst of claim 2 wherein at least one of R and R" is selected from the group consisting of ethylene, propylene and butylene moieties.
Claim 6
Dependent Claim
23 words
The catalyst of claim 2 wherein at least one of R' and R'" is selected from the group consisting of methyl or ethyl.
Claim 7
Dependent Claim
11 words
The catalyst of claim 1 wherein the piperazine is N-methoxypropyl piperazine.
Claim 8
Dependent Claim
11 words
The catalyst of claim 1 wherein the piperazine is N,N'-bismethoxypropyl piperazine.
Claim 9
Dependent Claim
11 words
The catalyst of claim 1 wherein the piperazine is N-methoxypropyl-N'-methyl piperazine.
Claim 10
Dependent Claim
47 words
The catalyst of claim 1 wherein the catalyst additionally comprises an N-alkoxyalkyl morpholine generally described by the formula: ##STR4## wherein: R iv is an alkylene group with 1 to about 5 carbon atoms; and R v is an alkyl group with 1 to about 3 carbon atoms.
Claim 11
Dependent Claim
20 words
The catalyst of claim 9 wherein R iv is selected from the group consisting of ethylene, propylene and butylene groups.
Claim 12
Dependent Claim
18 words
The catalyst of claim 9 wherein R v is selected from the group consisting of methyl or ethyl.
Claim 13
Dependent Claim
11 words
The catalyst of claim 9 wherein the morpholine is N-methoxypropyl morpholine.
Claim 14
Dependent Claim
17 words
The catalyst of claim 9 wherein the ratio of the morpholine to the piperazine is about 10:1-1:10.
Claim 15
Dependent Claim
17 words
The catalyst of claim 9 wherein the ratio of the morpholine to the piperazine is about 5:1-1:5.
Claim 16
Dependent Claim
31 words
A process for producing a polyurethane comprising reacting an organic isocyanate with an organic polyol in the presence of a catalyst comprising effective amount of an at least mono-N-substituted alkoxyalkyl piperazine.
Claim 17
Dependent Claim
31 words
A process for producing a polyurethane comprising reacting an organic isocyanate with an organic polyol in the presence of a catalyst comprising effective amount of an at least mono-N-substituted alkoxyalkyl piperazine.
Claim 18
Dependent Claim
83 words
The process of claim 15 wherein the alkoxyalkyl piperazine is an N-alkoxyalkyl piperazine generally described by the formula: ##STR5## wherein: Y is selected from the group consisting of (a) hydrogen; (b) alkyl groups having 1 to about 5 carbon atoms; and (c) the moiety generally described by the formula: R'"--O--R"-- R and R" are independently selected from alkylene groups having 1 to about 5 carbon atoms; and R' and R'" are independently selected from alkyl groups having 1 to about 3 carbon atoms.
Claim 19
Dependent Claim
48 words
The process of claim 15 wherein the catalyst composition additionally comprises an N-alkoxyalkyl morpholine generally described by the formula: ##STR6## wherein: R iv is an alkylene group having 1 to about 5 carbon atoms; and R v is an alkyl group having 1 to about 3 carbon atoms.
Claim 20
Dependent Claim
17 words
The process of claim 17 wherein the ratio of the morpholine to the piperazine is about 10:1-1:10.
Claim 21
Dependent Claim
17 words
The process of claim 18 wherein the ratio of the morpholine to the piperazine is about 5:1-1:5.
Claim 22
Dependent Claim
15 words
The process of claim 15 wherein the catalyst composition is present in about 0.5-4 php.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |