US3264374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymer formed by polymerizing butadiene in styrene with an alkylli catalyst, deactivating the catalyst and adding an organic peroxide
Assignee: Monsanto Co
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Filing: 1963-01-02
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Granted: 1966-08-02
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Robert W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS WHICH COMPRISES THE STEPS OF CONTACTING A CONJUGAGED 1,3-DIENE HYDROCARBON WITH A LITHIUM CATALYST OF THE GROUP CONSISTING OF LITHIUM AND A HYDROCARBYL LITHIUM, MAINTAINING IT IN CONTACT WITH THE LITHIUM CATALYST IN THE PRESENCE, AS THE SOLE DILUENT, OF A TOTAL OF AT LEAST 3 PART BY WEIGHT OF A MONOVINYLIDENE AROMATIC HYDROCARBON/PART OF THE CONJUGATED 1,3-DIENE HYDROCARBON UNTIL A RUBBERY POLYMER CONTAINING NOT MORE THAN ABOUT 75% BY WEIGHT OF CHEMICALLY-COMBINED MONOVINYLIDENE AROMATIC HYDROCARBON IS OBTAINED, DEACTIVATING THE RUBBERY POLYMER TO TERMINATE THE ACTIVITY OF THE LITHIUM CATALYST TO PRODUCE A POLYERIZABLE MATERIAL COMPRISING A RUBBER IN MONOMER SOUTION; ADDING AN ORGANOPEROXY CATALYST TO SAID POLYMERIZABLE MATERIAL AND HEATING SAID POLYMERIZABLE MATERIAL IN THE PRESENCE OF SAIDORGANOPEROXY CATALYST TO PROEUCE POLYMERIZATION THEREOF AND GRAFTING OF AT LEAST A PORTION OF SAID MONOVINYLIDENE AROMATIC HYDROCARBON ONTO SAID RUBBERY POLYMER.
Claim 2
Dependent Claim
142 words
A PROCESS WHICH COMPRISES THE STEPS OF CONTACTING A CONJUGAGED 1,3-DIENE HYDROCARBON WITH A LITHIUM CATALYST OF THE GROUP CONSISTING OF LITHIUM AND A HYDROCARBYL LITHIUM, MAINTAINING IT IN CONTACT WITH THE LITHIUM CATALYST IN THE PRESENCE, AS THE SOLE DILUENT, OF A TOTAL OF AT LEAST 3 PART BY WEIGHT OF A MONOVINYLIDENE AROMATIC HYDROCARBON/PART OF THE CONJUGATED 1,3-DIENE HYDROCARBON UNTIL A RUBBERY POLYMER CONTAINING NOT MORE THAN ABOUT 75% BY WEIGHT OF CHEMICALLY-COMBINED MONOVINYLIDENE AROMATIC HYDROCARBON IS OBTAINED, DEACTIVATING THE RUBBERY POLYMER TO TERMINATE THE ACTIVITY OF THE LITHIUM CATALYST TO PRODUCE A POLYERIZABLE MATERIAL COMPRISING A RUBBER IN MONOMER SOUTION; ADDING AN ORGANOPEROXY CATALYST TO SAID POLYMERIZABLE MATERIAL AND HEATING SAID POLYMERIZABLE MATERIAL IN THE PRESENCE OF SAIDORGANOPEROXY CATALYST TO PROEUCE POLYMERIZATION THEREOF AND GRAFTING OF AT LEAST A PORTION OF SAID MONOVINYLIDENE AROMATIC HYDROCARBON ONTO SAID RUBBERY POLYMER.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |