US3846351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary aromatic alkyl diamines as foam catalysts and chain extenders
Assignee: Eastman Kodak Co
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Filing: 1973-08-21
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Granted: 1974-11-05
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Expires: 1993-08-21
Abstract
Abstract A method of preparing flexible polyurethane foam by reacting a polyether polyol with a diisocyanate, using from about 0.01 to about 50 parts by weight per hundred parts polyol of N,N''dialkyl-p-phenylene-diamine, N,N''-dialkyl-m-phenylenediamine or mixtures thereof wherein the alkyl substituents contain from 3 to 10 carbon atoms as combination catalysts and chain extending agents, and a blowing agent.
Inventors
- 👤 J Besser
- 👤 J Huffaker
- 👤 A Clonce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/08; C08G18/16; C08G18/18; C08G18/1816; C08G18/30; C08G18/32; C08G18/3225; C08G18/325; C08G2110/00; C08G2110/0008; C08G2110/0083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN THE METHOD OF PRODUCING FLEXIBLE POLYURETHANE FOAM BY REACTING A POLYETHER POLYOL WITH A DIISOCYANATE AND FOAMING SAID POLYURETHANE BY THE USE OF A BLOWING AGENT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING WITH SAID REACTANTS AS THE ONLY CATALYST AND CHAIN EXTENDING AGENT BETWEEN ABOUT 0.5 AND ABOUT 5 PARTS BY WEIGHT PER HUNDRED PARTS POLYOL OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF N,N''-DIALKYLP-PHENYLENEDIAMINE AND N,N''-DIALKYL-M-PHENYLENEDIAMINE WHEREIN SAID ALKYL ROUPS CONTAIN BETWEEN 3 AND 10 CARBON ATOMS.
Claim 2
Dependent Claim
79 words
IN THE METHOD OF PRODUCING FLEXIBLE POLYURETHANE FOAM BY REACTING A POLYETHER POLYOL WITH A DIISOCYANATE AND FOAMING SAID POLYURETHANE BY THE USE OF A BLOWING AGENT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING WITH SAID REACTANTS AS THE ONLY CATALYST AND CHAIN EXTENDING AGENT BETWEEN ABOUT 0.5 AND ABOUT 5 PARTS BY WEIGHT PER HUNDRED PARTS POLYOL OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF N,N''-DIALKYLP-PHENYLENEDIAMINE AND N,N''-DIALKYL-M-PHENYLENEDIAMINE WHEREIN SAID ALKYL ROUPS CONTAIN BETWEEN 3 AND 10 CARBON ATOMS.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |