US3066115A
Expired / Lapsed
US
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Process for the polymerization of ethylenically unsaturated monomers with a diphenylethane accelerator
Assignee: BX Plastics Ltd
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Filing: 1958-11-28
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Granted: 1962-11-27
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Smith Robert Roy
- 👤 Mann Dennis Charles Macmillan
- 👤 Logie Gordon Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; C08F12/00; C08F12/02; C08F12/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE POLYMERISATION IN MASS OF UNSATURATED COMPOUNDS CONTAINING ETHYLENIC LINKAGES SELECTED FROM THE GROUP CONSISTING OF STYRENE, ORTHO-, META- AMD PARA-VINYL TOLUENES AND DIALLYL PHTHALATE MONOMERS, WHICH COMPRISES THE STEP OF PARTIALLY POLYMERISING THE SAID UNSATURATED COMPOUND IN A FIRST STAGE BY HEATING TO A TEMPERATURE OF AT MOST 125*C. UNTIL THE POLYMERISABLE COMPOUND HAS BEEN CONVERTED TO AN EXTENT OF AT LEAST 30%, ANY POLYMERISATION INITIATOR USED IN THIS STAGE BEING ONE THAT DISSOCIATES TO GIVE FREE RADICALS, AND THEREAFTER FURTHER POLYMERISING THE COMPOUND BY HEATING IT IN A FINAL STAGE TO A TEMPERATURE WITHIN THE RANGE OF 150 TO 250*C. WHILE CATALYTICALLY ACCELERATING THE RATE OF POLYMERISATION TO A SIGNIFICANT EXTENT BY THE INCORPORATION OF AT LEAST 0.001% BY WEIGHT OF A DIPHENYLETHANE COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE POLYMERISATION IN MASS OF UNSATURATED COMPOUNDS CONTAINING ETHYLENIC LINKAGES SELECTED FROM THE GROUP CONSISTING OF STYRENE, ORTHO-, META- AMD PARA-VINYL TOLUENES AND DIALLYL PHTHALATE MONOMERS, WHICH COMPRISES THE STEP OF PARTIALLY POLYMERISING THE SAID UNSATURATED COMPOUND IN A FIRST STAGE BY HEATING TO A TEMPERATURE OF AT MOST 125*C. UNTIL THE POLYMERISABLE COMPOUND HAS BEEN CONVERTED TO AN EXTENT OF AT LEAST 30%, ANY POLYMERISATION INITIATOR USED IN THIS STAGE BEING ONE THAT DISSOCIATES TO GIVE FREE RADICALS, AND THEREAFTER FURTHER POLYMERISING THE COMPOUND BY HEATING IT IN A FINAL STAGE TO A TEMPERATURE WITHIN THE RANGE OF 150 TO 250*C. WHILE CATALYTICALLY ACCELERATING THE RATE OF POLYMERISATION TO A SIGNIFICANT EXTENT BY THE INCORPORATION OF AT LEAST 0.001% BY WEIGHT OF A DIPHENYLETHANE COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2902464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-26 | 1966-05-28 | 1966-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-26 | 1970-05-28 | 1970-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-26 | 1974-05-28 | 1974-11-27 | $7700.00 | Window Closed / Lapsed |