US4080343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane catalyst
Assignee: Air Products and Chemicals Inc
•
Filing: 1976-09-22
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Granted: 1978-03-21
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Expires: 1996-09-22
Abstract
Abstract The use of catalytic amounts of pentamethyldipropylenetriamine promotes the formation of urethane links. Its unusual activity and properties makes the new compound very useful in the manufacture of flexible and rigid polyurethanes.
Inventors
- 👤 Daniel S. Raden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1808
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
The process of preparing a urethane consisting essentially in carrying out the polymerization reaction between a polyol and a polyisocyanate in the presence of N,N,N',N',N"-pentamethyldipropylene triamine, said triamine being used in an amount of between 0.02 and 4.0% by weight of said polyol.
Claim 2
Dependent Claim
43 words
The process of preparing a urethane consisting essentially in carrying out the polymerization reaction between a polyol and a polyisocyanate in the presence of N,N,N',N',N"-pentamethyldipropylene triamine, said triamine being used in an amount of between 0.02 and 4.0% by weight of said polyol.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said triamine is used in an amount of 0.5 and 2.0%.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein said reaction mixture also contains a blowing agent.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein said blowing agent is water.
Claim 6
Dependent Claim
13 words
The process of claim 3 wherein said blowing agent is CCl 3 F.
Claim 7
Dependent Claim
18 words
The process of claim 1 for making a urethane which uses, as a co-catalyst, an organic tin compound.
Claim 8
Dependent Claim
13 words
The process of claim 6 wherein said tin compound is dibutyl tin dilaurate.
Claim 9
Dependent Claim
14 words
The process of claim 6 where in said tin compound is a stannous diacylate.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
US3993606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |