Patent US4419457A successfully refreshed from Google Patents.
US4419457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyurethane foams
Assignee: DKS Co Ltd
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Filing: 1982-09-30
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Granted: 1983-12-06
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Expires: 2002-09-30
Abstract
Abstract There is provided a method of producing an open-cell polyurethane foam comprising heating a mixture of an aqueous emulsion of a polyurethane-forming composition and a fluorocarbon compound of 1 to 3 carbon atoms having a boiling point of 5 DEG to 100 DEG C. The above emulsion may further contain an ionic surfactant.
Inventors
- 👤 Mototsugu Tokunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/14; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/30; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
Method of producing an open-cell polyurethane foam comprising heating a mixture of an aqueous emulsion of a polyurethae-forming composition and a fluorocarbon compound of 1 to 3 carbon atoms having a boiling point of 5° to 100° C.
Claim 2
Dependent Claim
38 words
Method of producing an open-cell polyurethane foam comprising heating a mixture of an aqueous emulsion of a polyurethae-forming composition and a fluorocarbon compound of 1 to 3 carbon atoms having a boiling point of 5° to 100° C.
Claim 3
Dependent Claim
38 words
Method as claimed in claim 1 wherein the solid content of said aqueous emulsion is 15 to 80 weight percent and the amount of said fluorocarbon compound is 0.1 to 25 weight percent based on said solid content.
Claim 4
Dependent Claim
29 words
Method as claimed in claim 2 wherein said aqueous emulsion further contains an ionic surfactant in a proportion of 0.1 to 5 weight percent based on said solid content.
Claim 5
Dependent Claim
16 words
Method as claimed in claim 1 which includes a step of mechanically foaming prior to heating.
Claim 6
Dependent Claim
21 words
Method as claimed in claim 4 which further includes a step of applying the mechanically foamed mixture to a flexible substrate.
Claim 7
Dependent Claim
31 words
Method as claimed in claim 1 wherein said fluorocarbon compound is CCl 3 F, CHCl 2 F, C 2 Cl 3 F 3 or C 2 Br 2 F 4 .
Claim 8
Dependent Claim
13 words
Method as claimed in claim 1 wherein the mixture contains a water-miscible solvent.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |