Patent US2646418A successfully refreshed from Google Patents.
US2646418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing monovinyl aromatic compounds with rubber
Assignee: Dow Chemical Co
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Filing: 1951-05-25
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Granted: 1953-07-21
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Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
- 👤 John L Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:45
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F279/00; C08F279/02; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
THE METHOD OF MAKING A RESINOUS COMPOSITION WHICH COMPRISES, POLYMERIZING A SOLUTION OF FROM 85 TO 95 PER CENT BY WEIGHT OF AN ORGANIC LIQUID COMPOSED OF AT LEAST ONE MONOMERIC POLYMERIZABLE MONOALKENYL AROMATIC COMPOUND OF THE BENZENE SERIES HAVING AN ALKENYL RADICAL SELECTED FROM THE GROUP CONSISTING OF THE VINYL AND ISOPROPENYL RADICALS AS THE SOLE POLYMERIZABLE GROUP DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS, WHEREIN THE AROMATIC POLYMERIZABLE PORTION OF SAID LIQUID CONSISTS OF AT LEAST 75 PER CENT BY WEIGHT OF A MONOVINYL ARO MATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, AND FROM 15 TO 2 PER CENT OF AN UNSATURATED RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, RUBBERY COPOLYMERS OF FROM 20 TO 60 PER CENT BY WEIGHT OF STYRENE AND FROM 80 TO 40 PER CENT OF BUTADIENE, RUBBERY COPOLYMERS OF FROM 18 TO 35 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 82 TO 65 PER CENT OF BUTADIENE, AND HOMOPOLYMERS OF BUTADIENE, IN THE PRESENCE OF FROM 0.005 TO 0.75 PER CENT BY WEIGHT, BASED ON THE WEIGHT OF THE SOLUTION, OF A POLYMERIZATION MODIFYING AGENT WHICH IS AN UNSATURATED DIMER OF A MONOMERIC ALPHAALKYL STYRENE HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
216 words
THE METHOD OF MAKING A RESINOUS COMPOSITION WHICH COMPRISES, POLYMERIZING A SOLUTION OF FROM 85 TO 95 PER CENT BY WEIGHT OF AN ORGANIC LIQUID COMPOSED OF AT LEAST ONE MONOMERIC POLYMERIZABLE MONOALKENYL AROMATIC COMPOUND OF THE BENZENE SERIES HAVING AN ALKENYL RADICAL SELECTED FROM THE GROUP CONSISTING OF THE VINYL AND ISOPROPENYL RADICALS AS THE SOLE POLYMERIZABLE GROUP DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS, WHEREIN THE AROMATIC POLYMERIZABLE PORTION OF SAID LIQUID CONSISTS OF AT LEAST 75 PER CENT BY WEIGHT OF A MONOVINYL ARO MATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, AND FROM 15 TO 2 PER CENT OF AN UNSATURATED RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, RUBBERY COPOLYMERS OF FROM 20 TO 60 PER CENT BY WEIGHT OF STYRENE AND FROM 80 TO 40 PER CENT OF BUTADIENE, RUBBERY COPOLYMERS OF FROM 18 TO 35 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 82 TO 65 PER CENT OF BUTADIENE, AND HOMOPOLYMERS OF BUTADIENE, IN THE PRESENCE OF FROM 0.005 TO 0.75 PER CENT BY WEIGHT, BASED ON THE WEIGHT OF THE SOLUTION, OF A POLYMERIZATION MODIFYING AGENT WHICH IS AN UNSATURATED DIMER OF A MONOMERIC ALPHAALKYL STYRENE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
GB530375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |