Patent US4421673A successfully refreshed from Google Patents.
US4421673A
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US
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Catalyst for making polyurethanes
Assignee: Air Products and Chemicals Inc
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Filing: 1981-04-09
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Granted: 1983-12-20
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Expires: 2001-04-09
Abstract
Abstract Polyurethane foams with excellent physical properties can be obtained by using a partial salt between N,N-dimethylaminopropane-1,3-diamine (DMAPA) and a branched octanoic acid.
Inventors
- 👤 Francis W. Arbir
- 👤 Daniel S. Raden
- 👤 Kenneth W. Narducy
- 👤 Francois M. Casati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/144; C08J9/145; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G18/1875; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A catalyst composition for preparing urethane foams using methylene chloride as auxillary blowing agent, consisting essentially of 3-dimethylaminopropylamine and 10-50 equivalent-% thereof of a branched octanoic acid.
Claim 2
Dependent Claim
27 words
A catalyst composition for preparing urethane foams using methylene chloride as auxillary blowing agent, consisting essentially of 3-dimethylaminopropylamine and 10-50 equivalent-% thereof of a branched octanoic acid.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said octanoic acid is 2-ethylhexanoic acid.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said equivalent is between 20 and 30%.
Claim 5
Dependent Claim
9 words
The composition of claim 1 dissolved in dipropylene glycol.
Claim 6
Dependent Claim
21 words
The composition of claim 1 dissolved in 0.5 to 2.0 parts of dipropylene glycol per part of said 3-dimethylaminopropylamine/branched octanoic acid.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said octanoic acid is 2-ethylhexanoic acid.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |