Patent US2948703A successfully refreshed from Google Patents.
US2948703A
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Method for polymerizing styrene and acrylonitrile in the presence of polybutadiene and styrene-acrylonitrile copolymer latices and product obtained thereby
Assignee: Union Carbide Corp
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Filing: 1956-04-30
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Granted: 1960-08-09
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Juel P Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:43
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A STRONG, TOUGH THERMOPLASTIC STYRENE-ACRYLONITRILE GRAFTED POLYBUTADIENE MATERIAL MADE BY ADMIXING A LATEX PF POLYBUTADIENE WITH A LATEX OF A STYRENE-ACRYLONITRILE COPOLYMER COMPOSED PREDOMINANTLY OF STYRENE POLYMERIZED THEREIN, IN AMOUNTS OF ABOUT 0.5 TO ABOUT 1.5 PARTS BY WEIGHT OF SAID COPOLYMER PER PART OF SAID POLYBUTADIENE, ADDING STYRENE AND ACRYLONITRILE MONOMERS TO SAID MIXTURE OF LATICES, HEATING THE MONOMER-CONTAINING MIXTURE IN THE PRESENCE OF A FREE RADICAL POLYMERIZATION CATALYST AND POLYMERIZING THE STYRENE AND ACRYLONITRILE AND RECOVERING THE POLYMERIC PRODUCT THUS PRODUCED HAVING A MILLING TIME AT 170*C. OF BETWEEN ABOUT 5 TO ABOUT 8 MINUTES
Claim 2
Dependent Claim
97 words
A STRONG, TOUGH THERMOPLASTIC STYRENE-ACRYLONITRILE GRAFTED POLYBUTADIENE MATERIAL MADE BY ADMIXING A LATEX PF POLYBUTADIENE WITH A LATEX OF A STYRENE-ACRYLONITRILE COPOLYMER COMPOSED PREDOMINANTLY OF STYRENE POLYMERIZED THEREIN, IN AMOUNTS OF ABOUT 0.5 TO ABOUT 1.5 PARTS BY WEIGHT OF SAID COPOLYMER PER PART OF SAID POLYBUTADIENE, ADDING STYRENE AND ACRYLONITRILE MONOMERS TO SAID MIXTURE OF LATICES, HEATING THE MONOMER-CONTAINING MIXTURE IN THE PRESENCE OF A FREE RADICAL POLYMERIZATION CATALYST AND POLYMERIZING THE STYRENE AND ACRYLONITRILE AND RECOVERING THE POLYMERIC PRODUCT THUS PRODUCED HAVING A MILLING TIME AT 170*C. OF BETWEEN ABOUT 5 TO ABOUT 8 MINUTES
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |