US3977989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triethanolamine methylenedianiline curing agent and the process for using same in the manufacture of high resilient cold molded foam
Assignee: Honeywell International Inc
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Filing: 1974-01-28
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Granted: 1976-08-31
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Expires: 1994-01-28
Abstract
Abstract A novel curing agent and method for using same. The curing agent comprises from about 60 to about 70 weight percent triethanolamine, from about 20 to about 35 weight percent of a selected aromatic diamine and from about 5 to about 20 weight percent of a mixture of at least two aromatic polyamine compounds, each having the general formula:
Inventors
- 👤 Bernard Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G2110/00; C08G2110/0008; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0083; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A curing agent composition for polyurethane foam comprising an aromatic diamine wherein each amine group is attached to a different carbon atom of the same or different hydrocarbon aromatic ring which aromatic diamine may also contain on the aromatic ring halogen or lower alkyl substituents, sufficient triethanolamine to prevent gel formation in the polyurethane before foaming of the polyurethane is complete and a sufficient amount of an aromatic polyamine mixture of at least two compounds each having the general formula: ##SPC19##
Claim 2
Dependent Claim
81 words
A curing agent composition for polyurethane foam comprising an aromatic diamine wherein each amine group is attached to a different carbon atom of the same or different hydrocarbon aromatic ring which aromatic diamine may also contain on the aromatic ring halogen or lower alkyl substituents, sufficient triethanolamine to prevent gel formation in the polyurethane before foaming of the polyurethane is complete and a sufficient amount of an aromatic polyamine mixture of at least two compounds each having the general formula: ##SPC19##
Claim 3
Dependent Claim
76 words
A composition according to claim 1 comprising from about 60 to about 70 weight percent triethanolamine, from about 20 to about 35 weight percent aromatic diamine and from about 5 to about 20 weight percent of the aromatic polyamine mixture, provided that if one of said compounds in said mixture is said aromatic diamine then said mixture comprises at least 40% by weight of two compounds other than said aromatic diamine having the above general formula.
Claim 4
Dependent Claim
42 words
The composition according to claim 2 wherein the composition consists essentially of from about 60 to about 70 weight percent of triethanolamine, about 25 to 35 weight percent 4,4'-methylene dianiline and from about 6 to about 10 weight percent of said mixture.
Claim 5
Dependent Claim
14 words
The composition according to claim 3 wherein R 1 and R 2 are H.
Claim 6
Dependent Claim
16 words
The composition according to claim 3 wherein R 1 is H and R 2 is Cl.
Claim 7
Dependent Claim
43 words
The composition according to claim 4 wherein said mixture contains about 35 to about 50 percent by weight of mixture of: ##SPC20## about 15 to 25% of ##SPC21## about 10-20% of: ##SPC22## and the balance being: ##SPC23## where y is 3 to 15.
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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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |