Liquid castable elastomers
Abstract
Abstract A LIQUID CASTABLE URETHANE COMPOSITION CONSISTING OF THE REACTION PRODUCT OF (I) A PREPOLYMER OBTAINED BY REACTING A DIISOCYANATE WITH A POLYOXYPROPYLENE OR A POLYTETRAMETHYLENE ETHER DIOL OR TRIOL OR A CAPROLACTONE POLYOL OR ANY COMBINATION THEREOF WITH (II) A NEW AND NOVEL CURING SYSTEM COMPRISING (A) A POLYOXYPROPYLENE GLYCOL OR POYTETRAMETHYLENE ETHER DIOL HAVING A MOLECULAR WEIGHT OF FROM ABOUT 500 TO ABOUT 3000 OR A POLYOXYPROPLYLENE OF TETRAMETHYLENE TYPE TRIOL HAVING THE SAME EQUIVALENT WEIGHT RANGE; (B) AN AROMATIC DIOL, (C) AN AROMATIC AMINE CORRESPONGING TO THE FORMULA NH2-C6H4-(CH2-(NH2-PHENYLENE))N-CH2-C6H4-NH2 WHEREIN N REPRESENTS A VALUE BETWEEN 0.1 AND 0.3 AND (D) AN ORGANOMETALLIC CATALYST.
Inventors
- 👤 Obaidur Rahman Khan
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |