Patent US2996480A successfully refreshed from Google Patents.
US2996480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting exothermic reaction in butadiene rubber emulsion polymerizations
Assignee: Dow Chemical Co
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Filing: 1959-09-04
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Granted: 1961-08-15
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Expires: 1979-09-04
Abstract
No abstract record available.
Inventors
- 👤 George B Sterling
- 👤 John F Mulloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:02
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN THE EMULSION POLYMERIZATION OF A MIXTURE OF POLYMERIZABLE ORGANIC COMPOUNDS COMPRISING BUTADIENE TO FORM A SYNTHETIC RUBBER UNDER THE ACTION OF A POLYMERIZATION CATALYST, A METHOD OF INHIBITING A VIGOROUS EXOTHERMIC POLYMERIZATION REACTION AND PRODUCING A RUBBERY COPOLYMER OF GOOD COLOR AND IMPROVED SOFTNESS, WHICH METHOD COMPRISES CARRYING OUT THE OIL-IN-WATER TYPE AQUEOUS EMULSION POLYMERIZATION OF A MIXTURE OF MONOMERS CONSISTING ESSENTIALLY OF FROM 60 TO 70 PERCENT BY WEIGHT OF BUTADIENE AND FROM 40 TO 30 PERCENT OF AT LEAST ONE OF THE MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, VINYLTOLUENE, DICHLOROSTYRENE AND METHYL ISOPROPENYL KETONE, IN ADMIXTURE WITH FROM 0.5 TO 2 PERCENT OF A BORON-CONTAINING COMPOUND OF THE GROUP CONSISTING OF BENZENE BORONIC ACID, TRIPHENYL BORANE, TRIPHENYL BORATE, 2-PROPENE BORONIC ACID, DIMETHYLAMINE BORANE AND PYRIDINE BORANE, BASED ON THE WEIGHT OF THE POLYMERIZABLE MONOMERS INITIALLY USED.
Claim 2
Dependent Claim
142 words
IN THE EMULSION POLYMERIZATION OF A MIXTURE OF POLYMERIZABLE ORGANIC COMPOUNDS COMPRISING BUTADIENE TO FORM A SYNTHETIC RUBBER UNDER THE ACTION OF A POLYMERIZATION CATALYST, A METHOD OF INHIBITING A VIGOROUS EXOTHERMIC POLYMERIZATION REACTION AND PRODUCING A RUBBERY COPOLYMER OF GOOD COLOR AND IMPROVED SOFTNESS, WHICH METHOD COMPRISES CARRYING OUT THE OIL-IN-WATER TYPE AQUEOUS EMULSION POLYMERIZATION OF A MIXTURE OF MONOMERS CONSISTING ESSENTIALLY OF FROM 60 TO 70 PERCENT BY WEIGHT OF BUTADIENE AND FROM 40 TO 30 PERCENT OF AT LEAST ONE OF THE MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, VINYLTOLUENE, DICHLOROSTYRENE AND METHYL ISOPROPENYL KETONE, IN ADMIXTURE WITH FROM 0.5 TO 2 PERCENT OF A BORON-CONTAINING COMPOUND OF THE GROUP CONSISTING OF BENZENE BORONIC ACID, TRIPHENYL BORANE, TRIPHENYL BORATE, 2-PROPENE BORONIC ACID, DIMETHYLAMINE BORANE AND PYRIDINE BORANE, BASED ON THE WEIGHT OF THE POLYMERIZABLE MONOMERS INITIALLY USED.
References Cited (Backward Citations)
US2515686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |