US3280084A
Expired / Lapsed
US
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Reducing cold flow in conjugated diene polymers with a polyvinyl aromatic compound
Assignee: Phillips Petroleum Co
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Filing: 1962-07-16
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Granted: 1966-10-18
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Robert P Zelinski
- 👤 Henry L Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:33
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS FOR MAKING A CONJUGATED DIENE POLYMER IN THE PRESENCE OF A HYDROCARBON LITHIUM INITIATOR, THE METHOD OF REDUCING THE TENDENCY OF THE POLYMER TO COLD FLOW WITHOUT PRODUCING GEL WHICH COMPRISES ADDING TO THE POLYMERIZATION MIXTURE FROM ABOUT 0.02 TO 1.0 PART BY WEIGHT PER 100 PARTS OF MONOMER OF A POLYVINYL AROMATIC COMPOUND, AND HOLDING THE RESULTING MIXTURE AFTER COMPLETION OF POLYMERIZATION OF THE CONJUGATED DIENE HYDROCARBON FOR FIVE MINUTES TO TEN HOURS AT A TEMPERATURE IN THE RANGE OF 85 TO 300* F.
Claim 2
Dependent Claim
88 words
IN A PROCESS FOR MAKING A CONJUGATED DIENE POLYMER IN THE PRESENCE OF A HYDROCARBON LITHIUM INITIATOR, THE METHOD OF REDUCING THE TENDENCY OF THE POLYMER TO COLD FLOW WITHOUT PRODUCING GEL WHICH COMPRISES ADDING TO THE POLYMERIZATION MIXTURE FROM ABOUT 0.02 TO 1.0 PART BY WEIGHT PER 100 PARTS OF MONOMER OF A POLYVINYL AROMATIC COMPOUND, AND HOLDING THE RESULTING MIXTURE AFTER COMPLETION OF POLYMERIZATION OF THE CONJUGATED DIENE HYDROCARBON FOR FIVE MINUTES TO TEN HOURS AT A TEMPERATURE IN THE RANGE OF 85 TO 300* F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |