Method of producing articles of cross-linked polyethylene
Abstract
Abstract A METHOD OF PREPARATION OF A SHAPED ARTICLE OF A CROSSLINKED POLYOLEFINE, AND IN PARTICULAR OF CRYSTALLINE POLYETHYLENE, WHICH COMPRISES METL-SHAPING A COMPOSITION COMPRISING (I) 100 PARTS OF A CRYSTALLINE POLYOLEFINE HAVING A CRYSTALLINE MELTING POINT TM, (II) 0.25 TO 10 PARTS OF A THERMALLY ACTIVATABLE FREERADICAL GENERATOR HAVING A HALF-LIFE (T 1/2) LONGER THAN 20 MINUTES AT TM PLUS 10*C. AND (III) PREFERABLY FROM 1 TO 20 PARTS OF A POLYMERISABLE NONCONJUGATED POLYENE, UNDER CONDITIONS AT WHICH NOT MORE THAN 60% OF THE FREERADICAL GENERATOR IS DISSOCIATED WHILE THE COMPOSITION IS AT A TEMPERATURE ABOVE TM AND THEREFORE HEATING THE SHAPED COMPOSITION AT A TEMPERATURE BELOW TM AT WHICH THE FREE-RADICAL GENERATOR IS DISSOCIATED AND CORSS-LINKING OCCURS.
Inventors
- 👤 Robert Frederick Bates
- 👤 Harry Brody
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |