US3168593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock-resistant compositions prepared by polymerizing styrene and acrylonitrile withpolybutadiene
Assignee: Union Carbide Corp
•
Filing: 1953-01-15
•
Granted: 1965-02-02
•
Expires: 1973-01-15
Abstract
No abstract record available.
Inventors
- 👤 George H Fremon
- 👤 William N Stoops
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:25
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
PROCESS FOR FORMING SYNTHETIC RESINS WHICH COMPRISES EMULSIFYING BUTADIENE AS ESSENTIALLY THE SOLE MONOMERIC MATERIAL IN WATER CONTAINING AN EMULSIFYING AGENT AND A FREE RADICAL-TYPE CATALYST, POLYMERIZING THE BUTADIENE AT A TEMPERATURE BELOW ABOUT 60*C. TO FORM A POLYMER HAVING A SPECIFIC VISCOSITY ABOVE ABOUT 0.3, ADDING TO THE POLYMERIC LATEX THUS FORMED A MIXTURE OF STYRENE AND ACRYLONITRILE AND POLYMERIZING THE STYRENE AND ACRYLONITRILE IN THE PRESENCE OF THE BUTADIENE POLYMER TO FORM A SYNTHETIC RESIN HAVING AS ITS ULTIMATE COMPOSITION FROM 23% TO 41% OF BUTADIENE, FROM 29% TO 67% OF STYRENE, AND FROM 10% TO 30% OF ACRYLONITRILE, SAID SYNTHETIC RESIN HAVING A BRITTLE TEMPERATURE BELOW -20*C. AND A STIFFNESS MODULUS AT 30*C. OF AT LEAST 50,000 P.S.I.
Claim 2
Dependent Claim
121 words
PROCESS FOR FORMING SYNTHETIC RESINS WHICH COMPRISES EMULSIFYING BUTADIENE AS ESSENTIALLY THE SOLE MONOMERIC MATERIAL IN WATER CONTAINING AN EMULSIFYING AGENT AND A FREE RADICAL-TYPE CATALYST, POLYMERIZING THE BUTADIENE AT A TEMPERATURE BELOW ABOUT 60*C. TO FORM A POLYMER HAVING A SPECIFIC VISCOSITY ABOVE ABOUT 0.3, ADDING TO THE POLYMERIC LATEX THUS FORMED A MIXTURE OF STYRENE AND ACRYLONITRILE AND POLYMERIZING THE STYRENE AND ACRYLONITRILE IN THE PRESENCE OF THE BUTADIENE POLYMER TO FORM A SYNTHETIC RESIN HAVING AS ITS ULTIMATE COMPOSITION FROM 23% TO 41% OF BUTADIENE, FROM 29% TO 67% OF STYRENE, AND FROM 10% TO 30% OF ACRYLONITRILE, SAID SYNTHETIC RESIN HAVING A BRITTLE TEMPERATURE BELOW -20*C. AND A STIFFNESS MODULUS AT 30*C. OF AT LEAST 50,000 P.S.I.
Claim 3
Dependent Claim
79 words
A SYNTHETIC RESIN HAVING A BRITTLE TEMPERATURE BELOW -20*C. AND A STIFFNESS MODULUS AT 30*C. OF AT LEAST 50,000 P.S.I., SAID RESIN BEING A POLYMER OF A MIXTURE OF STYRENE AND ACRYLONITRILE POLYMERIZED IN THE PRESENCE OF A POLYBUTADIENE HOMOPOLYMER PREVIOUSLY POLYMERIZED AT A TEMPERATURE BELOW 60*C., THE ULTIMATE COMPOSITION OF SAID RESIN BEING FROM 23 PERCENT TO 41 PERCENT OF BUTADIENE, FROM 10 PERCENT TO 30 PERCENT OF ACRYLONITRILE, AND FROM 29 PERCENT TO 67 PERCENT OF STYRENE.
Claim 4
Dependent Claim
79 words
A SYNTHETIC RESIN HAVING A BRITTLE TEMPERATURE BELOW -20*C. AND A STIFFNESS MODULUS AT 30*C. OF AT LEAST 50,000 P.S.I., SAID RESIN BEING A POLYMER OF A MIXTURE OF STYRENE AND ACRYLONITRILE POLYMERIZED IN THE PRESENCE OF A POLYBUTADIENE HOMOPOLYMER PREVIOUSLY POLYMERIZED AT A TEMPERATURE BELOW 60*C., THE ULTIMATE COMPOSITION OF SAID RESIN BEING FROM 23 PERCENT TO 41 PERCENT OF BUTADIENE, FROM 10 PERCENT TO 30 PERCENT OF ACRYLONITRILE, AND FROM 29 PERCENT TO 67 PERCENT OF STYRENE.
References Cited (Backward Citations)
GB649466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |