US3207710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyurethane foam and process for making same
Assignee: Dow Chemical Co
•
Filing: 1960-09-01
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Granted: 1965-09-21
•
Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Davis Billy Don
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/546
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE PROCESS FOR MAKING FLEXIBLE POLYURETHANE FOAMS COMPRISING REACTING A POLYOL WITH 1 TO 2 EQUIVALENTS OF AN ARYLENE DIISOCYANATE IN THE PRESENC E OF A BLOWING AGENT AND A CATALYST, SAID POLYOL BEING THE PRODUCT MADE BY (1) CONDENSING A PHENOL-ALDEHYDE RESIN CONTAINING 5 TO 16 PHENOL UNITS PER MOLECULE WITH 20 TO 50 MOLES OF A LOWER ALKYLENE OXIDE PER PHENOL UNIT, THUS TO FORM AN OXYALKYLATED PHENOL-ALDEHYDE RESIN; (2) ESTERIFYING ALL EXCEPT 2 TO 3 OF THE HYDROXYL GROUPS IN SAID OXYALKYLATED RESIN WITH A LONG-CHAIN FATTY ACID; AND (3) HEATING THE PARTIALLY ESTERFIED RESIN WITH ABOUT 0.5 TO 2 PARTS BY WEIGHT OF A TRIOL SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A LONG-CHAIN ALIPHATIC POLYOXYALKYLENE TRIOL HAVING A MOLECULAR WEIGHT OF ABOUT 400 TYO 800, SAID HEATING BEING SUFFICIENT TO RESULT IN THE POLYOL HAVING AN ACID NUMBER OF NOT MORE THAN 2.5.
Claim 2
Dependent Claim
150 words
THE PROCESS FOR MAKING FLEXIBLE POLYURETHANE FOAMS COMPRISING REACTING A POLYOL WITH 1 TO 2 EQUIVALENTS OF AN ARYLENE DIISOCYANATE IN THE PRESENC E OF A BLOWING AGENT AND A CATALYST, SAID POLYOL BEING THE PRODUCT MADE BY (1) CONDENSING A PHENOL-ALDEHYDE RESIN CONTAINING 5 TO 16 PHENOL UNITS PER MOLECULE WITH 20 TO 50 MOLES OF A LOWER ALKYLENE OXIDE PER PHENOL UNIT, THUS TO FORM AN OXYALKYLATED PHENOL-ALDEHYDE RESIN; (2) ESTERIFYING ALL EXCEPT 2 TO 3 OF THE HYDROXYL GROUPS IN SAID OXYALKYLATED RESIN WITH A LONG-CHAIN FATTY ACID; AND (3) HEATING THE PARTIALLY ESTERFIED RESIN WITH ABOUT 0.5 TO 2 PARTS BY WEIGHT OF A TRIOL SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A LONG-CHAIN ALIPHATIC POLYOXYALKYLENE TRIOL HAVING A MOLECULAR WEIGHT OF ABOUT 400 TYO 800, SAID HEATING BEING SUFFICIENT TO RESULT IN THE POLYOL HAVING AN ACID NUMBER OF NOT MORE THAN 2.5.
References Cited (Backward Citations)
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Cited
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |