Zjl fxx mss mss^h disperstbzg,osi for making microporous materials
Abstract
Abstract A PROCESS FOR FORMING A COLLOIDAL POLYMERIC DISPERSION USED IN MAKING MICROPOROUS SHEET MATERIAL HAVING A SECANT TENSILE MODULUS AT 5% ELONGATION OF ABOUT 600 P.S.I. BY MICROBLENDING A SOLUTION OF A POLYMERIC COMPONENT AND A SOLUTION OF A SOLVENT AND A NON-SOLVENT FOR THE POLYMERIC COMPONENT. THE MICROBLENDING BEING ACHIEVED IN ABOUT 0.5-5 SECONDS IN A HIGH SHEAR MIXING ZONE HAVING A SHEAR RATE OF 1,000-15,000 RECIPROCAL SECONDS AND OF A STREAM OF A SOLUTION OF A POLYMERIC COMPONENT, AND PARTICULARLY A LINEAR POLYURETHANE OR A BLEND OF A LINEAR POLYURETHANE AND POLY (VINYL CHLORIDE), AT ABOUT 15-60* C. AND OF A STREAM OF AN ORGANIC SOLVENT AND NON-SOLVENT, PARTICLARLY WATER, AT ABOUT 20-50*C. THE QUANTITY OF ORGANIC SOLVENT BEING ABOUT 95-25% AND THE QUAN- TITY OF NON-SOLVENT BEING ABOUT 5-75%. THE TEMPERATURE OF THE BLEND BEING THEREAFTER REDUCED ABOUT 2-50*C. TO FORM A COLLOIDAL POLYMERIC DISPERSION HAVING A NON-SOLVENT CONTENT OF ABOUT 3-5% BY WEIGHT.
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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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |