US2616864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making thermoplastic compositions from resinous polymers of monovinyl aromatic hydrocarbons and butadiene-styrene elastomers
Assignee: Dow Chemical Co
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Filing: 1951-03-29
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Granted: 1952-11-04
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Expires: 1971-03-29
Abstract
No abstract record available.
Inventors
- 👤 Walter E Donaldson
- 👤 Alden W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
C; C08; C08L; C08L25/00; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF MAKING A THERMOPLASTIC COMPOSITION COMPOSED PRINCIPALLY OF A POLYMERIZED MONOVINYL AROMATIC HYDROCARBON AND A RUBBERY COPOLYMER OF STYRENE AND BUTADIENE, WHICH COMPRISES BENDING FROM 75 TO 90 PARTS BY WEIGHT OF A RESINOUS POLYMER OF A MONOVINYL AROMATIC HYDROCARBON HAVING THE VINYL GROUP AS THE SOLE NON-AROMATIC UNSATURATION, FROM 5 TO 12 PARTS OF A RUBBERY COPOLYMER OF FROM 50 TO 80 PER CENT BY WEIGHT OF BUTADIENE AND FROM 50 TO 20 PER CENT OF STYRENE, FROM 2 TO 6 PARTS OF A SOLID POLYETHYLENE AND FROM 3 TO 7 PARTS OF A LIQUID MIXTURE OF POLYMERIZABLE VINYL AROMATIC HYDROCARBONS AND A DRYING OIL, INTO A HOMOGENEOUS MASS BY MASTICATING A MIXTURE OF THE INGREDIENTS AT A HEAT-PLASTIFYING TEMPERATURE BETWEEN160* AND 220* C. FOR A TIME OF FROM 3 TO 15 MINUTES TO FORM A HOMOGENEOUS COMPOSITION.
Claim 2
Independent Claim
141 words
THE METHOD OF MAKING A THERMOPLASTIC COMPOSITION COMPOSED PRINCIPALLY OF A POLYMERIZED MONOVINYL AROMATIC HYDROCARBON AND A RUBBERY COPOLYMER OF STYRENE AND BUTADIENE, WHICH COMPRISES BENDING FROM 75 TO 90 PARTS BY WEIGHT OF A RESINOUS POLYMER OF A MONOVINYL AROMATIC HYDROCARBON HAVING THE VINYL GROUP AS THE SOLE NON-AROMATIC UNSATURATION, FROM 5 TO 12 PARTS OF A RUBBERY COPOLYMER OF FROM 50 TO 80 PER CENT BY WEIGHT OF BUTADIENE AND FROM 50 TO 20 PER CENT OF STYRENE, FROM 2 TO 6 PARTS OF A SOLID POLYETHYLENE AND FROM 3 TO 7 PARTS OF A LIQUID MIXTURE OF POLYMERIZABLE VINYL AROMATIC HYDROCARBONS AND A DRYING OIL, INTO A HOMOGENEOUS MASS BY MASTICATING A MIXTURE OF THE INGREDIENTS AT A HEAT-PLASTIFYING TEMPERATURE BETWEEN160* AND 220* C. FOR A TIME OF FROM 3 TO 15 MINUTES TO FORM A HOMOGENEOUS COMPOSITION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |