Polyurethane foams based on liquid poly(e-caprolactone)polyester polyols
Abstract
Abstract FLEXIBLE POLYESTER-URETHANE FOAMS HAVING EXCELLENT HUMID AGING PROPERTIES, ABILITY TO BE FLAME-LAMINATED AND TO WITHSTAND DRY-CLEANING SOLVENT, PREPARED BY REACTING LIQUID POLYESTERS CONTAINING ABOUT 10 PERCENT TO 72 PERCENT BY WEIGHT OF THE EPSILON-OXYCAPROYL UNIT -O-(CH2)5-CO- WITH AN ORGANIC POLYISOCYANATE, WATER AND OPTIONALLY, OTHER BLOWING AGENTS A CATALYST AND A SURFACTANT, AND PROCESSES FOR THEIR PREPARTION. LIQUID POLYESTERS HAVING HYDROXYL EQUIVALENT OF FROM ABOUT 800 TO ABOUT 1400, BY REACTION OF ABOUT 10 TO 73 PERCENT BY WEIGHT OF EPSILON-CAPROLACTONE, OR ALTERANATIVELY ABOUT 12 TO 80 PERCENT BY WEIGHT OF A MIXTURE OF 6-HYDROXYCAPROIC ACID AND ITS LOWER OLIGOMERS, WITH FROM ABOUT 90 TO ABOUT 28 PERCENT BY WEIGHT OF A MIXTURE COMPRISING REACTED SEGMENTS OF AN ORGANIC DICARBOXYLIC ACID, AN ALKYLENE GLYCOL AND A TRIOL SUCH AS TRIMETHYLOPROPANE, AND PROCESSES FOR THEIR PREPRARATION.
Inventors
- 👤 F Lombardi
- 👤 F Hostettler
- 👤 W Cook
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) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |