A-b-s polyblend
Abstract
Abstract THERE IS DISCLOSED A POLYBLEND COMPOSITION HAVING A MATRIX OF AN INTERPOLYMER OF MONOVINYLIDENE AROMATIC HYDROCARBON AND AN UNSATURATED NITRILE, AND FIRST AND SECOND GRAFT COPOLYMERS EACH HAVING A RUBER SUBSTRATE AND A SUPERSTRATE OF AN INTERPOLYMER OF A MONOVINYLIDENE AROMATIC HYDROCARBON AND AN UNSATURATED NITRILE. THE FIRST AND SECOND GRAFT COPOLYMERS ARE RELATIVELY HIGHLY CROSS-LINKED AND RELATIVELY LOWLY CROSS-LINKED, RESPECTIVELY. THE COMBINED GRAFT COPOLYMERS COMPRISE 1.0 TO 70.0 PERCENT BY WEIGHT OF THE POLYBLEND, AND THE FIRST GRAFT COPOLYMER COMPRISES ABOUT 60.0 TO 95.0 PERCENT BY WEIGHT OF THE COMBINED GRAFT COPOLYMERS. A PROCESS FOR MAKING SUCH POLYBLENDS IS DISCLOSED WHEREIN THE TWO GRAFT COPOLYMERS ARE PREPARED SEPARATELY AND THEREAFTER BLENDED ALTHOUGH BOTH MAY BE PREPARED IN A SINGLE REACTOR FROM SUITABLE CONTROLLED RUBBER FEEDSTOCKS. OTHER COMPONENTS MAY OPTIONALLY BE INCLUDED.
Inventors
- 👤 Michael B Jastrzebski
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |