Diamine-curable polyurethane compositions containing oleic acid as catalyst
Abstract
Abstract DIAMINE CURED POLYURETHANE COMPOSITIONS HAVING UNUSUALLY LONG POT LIFE WHILE RAPIDLY CURING AT ELEVATED TEMPERATURES AND HAVING REMARKABLE STORAGE STABILITY AT -40*F. ARE PREPARED BY COMBINING A PREPOLYMER OF A DI OR POLY ISOCYANATE AND A HYDROXY TERMINATED POLYETHER OR POLYESTER HAVING A MOLECULAR WEIGHT IN THE 150 TO 3,000 RANGE, SAID PREPOLYMER CONTAINING ABOUT 2.5 TO 10% BY WEIGHT -NCO, WITH A LOWER ALKYLENE BIS ANTHRANILIC ACID ESTER OR A SUPSENSION OF A LOWER ALKYLENE BIS ANTHRANILIC ACID ESTER IN AN ANHYDROUS DILUENT SELECTED FROM THE GROUP CONSISTING OF PLASTICIZERS AND CO-CURING GLYCOLS, THE PROPORTIONS OF SAID PREPOLYMER AND HARDENER BEING SUCH AS TO PROVIDE AN NH2:NCO RATIO OF ABOUT 0.9:1 TO 1.0:1, AND OLEIC ACID AS A POLYURETHANE CATALYST. THE PREPOLYMER AND HARDENER, IF DEGASSED TO REMOVE AIR AND MOISTURE, PROVIDE STABLE TWO-COMPONENT RESIN SYSTEMS HAVING EXCELLENT SHELF LIFE. ONE COMPONENT SYSTEMS WITH EXCEPTIONAL STORAGE STABILITY ARE PREPARED BY MIXING THE PREPOLYMER AND HARDENER, FREEZING THE MIXTURE AT -40*F. AND STORING THE RESULTING COMPOSITION AT -40*F.
Inventors
- 👤 William M Ryan
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |