US4473666A
Expired / Lapsed
US
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Catalyst system for use in producing carboxylic acid blown polyurethane foams
Assignee: Air Products and Chemicals Inc
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Filing: 1984-01-30
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Granted: 1984-09-25
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Expires: 2004-01-30
Abstract
Abstract A catalyst system and process are provided for producing polyurethane foams using a carboxylic acid blowing agent, wherein an organic polyol and an organic polyisocyanate are contacted with a catalyst system comprising a dialkylcyclohexylamine and an N-substituted alkoxyalkyl piperazine.
Inventors
- 👤 Francois M. Casati
- 👤 Daniel S. Raden
- 👤 Francis W. Arbir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1816; C08G18/1875; C08G18/20; C08G18/2009; C08G18/2027; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
35 words
A catalyst system for use in reacting an organic isocyanate with an organic polyol in the presence of a carboxylic acid blowing agent, wherein the catalyst system comprises a dialkylcyclohexylamine and an N-substituted alkoxyalkyl piperazine.
Claim 2
Dependent Claim
35 words
A catalyst system for use in reacting an organic isocyanate with an organic polyol in the presence of a carboxylic acid blowing agent, wherein the catalyst system comprises a dialkylcyclohexylamine and an N-substituted alkoxyalkyl piperazine.
Claim 3
Dependent Claim
36 words
The catalyst system of claim 1 wherein the dialkylcyclohexylamine is generally described by the formula: ##STR4## wherein R and R' are independently selected from the group consisting of C 1 to about C 4 alkyl groups.
Claim 4
Dependent Claim
26 words
The catalyst system of claim 2 wherein R and R' are independently selected from the group consisting of C 1 to about C 3 alkyl groups.
Claim 5
Dependent Claim
92 words
The catalyst system of claim 1 wherein the N-alkoxyalkyl piperazine is generally described by the formula: ##STR5## wherein Y is selected from the group consisting of hydrogen, alkyl groups having 1 to about 5 carbon atoms, and the moiety generally described by the formula R v --O--R iv ; R" and R iv are independently selected from the group consisting of alkylene moieties having 1 to about 5 carbon atoms; and R"' and R v are independently selected from the group consisting of alkyl groups having 1 to about 3 carbon atoms.
Claim 6
Dependent Claim
26 words
The catalyst system of claim 4 wherein R" and R iv are independently selected from the group consisting of C 2 to C 4 alkylene moieties.
Claim 7
Dependent Claim
23 words
The catalyst system of claim 4 wherein R'" and R v are independently selected from the group consisting of methyl and ethyl groups.
Claim 8
Dependent Claim
19 words
The catalyst system of claim 4 wherein Y is an alkyl group having 1 to about 3 carbon atoms.
Claim 9
Dependent Claim
15 words
The catalyst system of claim 1 wherein the catalyst system additionally comprises an N-alkoxyalkyl morpholine.
Claim 10
Dependent Claim
45 words
The catalyst system of claim 8 wherein the N-alkoxyalkyl morpholine is generally described by the formula: ##STR6## wherein R vi is an alkyl moiety having 1 to about 5 carbon atoms; and R vii is an alkyl group with 1 to about 3 carbon atoms.
Claim 11
Dependent Claim
19 words
The catalyst system of claim 9 wherein R vi is an alkylene moiety having 2 to 4 carbon atoms.
Claim 12
Dependent Claim
15 words
The catalyst system of claim 9 wherein R vii is selected from methyl or ethyl.
Claim 13
Dependent Claim
11 words
The catalyst system of claim 1 wherein the dialkylcyclohexylamine is diethylcyclohexylamine.
Claim 14
Dependent Claim
12 words
The catalyst system of claim 1 wherein the piperazine is N-methoxypropyl piperazine.
Claim 15
Dependent Claim
20 words
The catalyst system of claim 1 wherein the ratio of the dialkylcyclohexylamine to the piperazine is about 1:0.5 to 1:5.
Claim 16
Dependent Claim
12 words
The catalyst system of claim 8 wherein the morpholine is N-methoxypropyl morpholine.
Claim 17
Dependent Claim
19 words
The catalyst of claim 8 wherein the ratio of the dialkylcyclohexylamine to the morpholine is about 1:0.5 to 1:2.
Claim 18
Dependent Claim
42 words
A process for producing a polyurethane foam from an organic isocyanate and an organic polyol in the presence of a carboxylic acid blowing agent by contacting the isocyanate and the polyol with a catalyst system comprising a dialkylcyclohexylamine and an N-alkoxyalkyl piperazine.
Claim 19
Dependent Claim
42 words
A process for producing a polyurethane foam from an organic isocyanate and an organic polyol in the presence of a carboxylic acid blowing agent by contacting the isocyanate and the polyol with a catalyst system comprising a dialkylcyclohexylamine and an N-alkoxyalkyl piperazine.
Claim 20
Dependent Claim
17 words
The process of claim 17 wherein the ratio of dialkylcyclohexylamine to piperazine is about 1:0.05 to 1:5.
Claim 21
Dependent Claim
14 words
The process of claim 17 wherein the catalyst system additionally comprises an N-alkoxyalkyl morpholine.
Claim 22
Dependent Claim
17 words
The process of claim 19 wherein the ratio of dialkylcyclohexylamine to morpholine is about 1:0.5 to 1:2.
Claim 23
Dependent Claim
21 words
The process of claim 17 wherein the catalyst system is present in an amount equal to about 0.1 to 4 php.
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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |