Stable polyol compositions and use thereof in preparation of polyurethane foam
Abstract
Abstract PRODUCTION OF POLYURETHANE FOAMS BY REACTION OF A POLYISOCYANATE WITH A MIXTURE OF A POLYETHER POLYOL AND STERICALLY HINDERED AROMATIC POLYAMINE IN THE PRESENCE OF A BLOWING AGENT CONSISTING SOLELY OF A HALOGENATED HYDROCARBON, A TERTIARY AMINE CATALYST AND A DIVALENT LEAD CATALYST. THE POLYURETHANE FOAMS ARE PREFERABLY PRODUCED BY A ONE-SHOT METHOD INVOLVING REACTION OF A TWO PACKAGE SYSTEM COMPRISING (1) A POLYISOCYANATE WITH (2) A STORAGE STABLE COMPOSITION OF MATTER COMPRISING (A) A POLYETHER POLYOL; (B) A STERICALLY HINDERED AROMATIC POLYAMINE; (C) A HALOGENATED HYDROCARBON BLOWING AGENT; (D) A TERTIARY AMINE CATALYST; AND (E) A DIVALENT LEAD CATALYST, SAID POLYOL AND SAID DIAMINE BEING PRESENT IN SUCH PROPORTION TO PROVIDE AN AMINE/HYDROXYL GROUP RATIO OF BETWEEN ABOUT 1 AND 4.
Inventors
- 👤 Leon M Zwolinski
- 👤 John W Frink
Bibliographic Details
Claims Analysis
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |