Arylene sulfimide polymers
Abstract
Abstract NEW POLYMERS OF IMPROVED RESISTANCE TO HIGH TEMPERATURES COMPRISING POLYARYLENE POLYSULFIMIDES PREPARED BY THE CONDENSATION OR TETRAFUNCTIONAL AROMATIC POLYSULFONIC COMPOUNDS OF THE FORMULA (X-SO2)2-AR-(Y)2 WITH POLYAMINES OF THE FORMULA H2N-AR''-NH2 WHEREIN AR AND AR'' REPRESENT POLYVALENT AROMATIC NUCLEI; THE SO2X GROUPS ARE EACH PAIRED WITH A Y RADICAL IN AN ORTHO OR PERI POSITION; Y REPRESENTS-COX OR -SO2X; X IS OR, CL, BR, OR TWO X''S OF ADJACENT FUNCTIONAL GROUPS CAN TOGETHER REPRESENT-O-OR-NR-; AND R IS HYDROGEN OR A HYDROCARBON RADICAL OF NO MORE THAN 20 CARBON ATOMS. THE POLYMERS OF THIS INVENTION MAY BE USED FOR PREPARING LAMINATES, ADHESIVES, FIBERS AND MOLDING COMPOSITIONS PARTICULARLY FOR USE AT HIGH TEMPERATURES SUCH AS IN AEROSPACE FLIGHT.
Inventors
- 👤 Gaetano F D Alelio
Bibliographic Details
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |