Patent US3234302A successfully refreshed from Google Patents.
US3234302A
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Polymerization of butadiene, styrene and acrylonitrile with butadienestyrene copolymer
Assignee: WR Grace and Co
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Filing: 1963-10-22
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Granted: 1966-02-08
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Expires: 1983-10-22
Abstract
No abstract record available.
Inventors
- 👤 Donald M Wacome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:36
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A PROCESS FOR MAKING A SOLVENT-RESISTANT COPOLYMER WHICH COMPRISES FORMING AN AQUEOUS PHASE COMPOSED OF A WATER SOLUTION OF AN EMULSIFYING AGENT; ADDING TO SAID AQUEOUS PHASE FROM ABOUT 15 TO 100 PARTS BY WEIGHT OF A 90 TO 10% BUTADIENE- 10 TO 90% STYRENE COPOLYMER IN THE FORM OF A COMPLETELY FINISHED LATEX, SAID LATEX BEING SUBSTANTIALLY DEVOID OF FREE MONOMERS AND CATALYST, A WATER SOLUBLE PEROXYGEN CATALYST, AND ABOUT 100 PARTS BY WEIGHT OF A MONOMER COMPOSITION OF BUTADIENE, STYRENE AND ACRYLONITRILE; AND MAINTAINING THE RESULTING MIXTURE AT POLYMERIZATION TEMPERATURE UNTIL JPOLYMERIZATION OF THE ADDED MONOMER COMPOSITION HAS PROCEEDED TO FROM 90 TO 100% OF COMPLETE CONVERSION; THE ADDED MONOMER COMPOSITION BEING ADJUSTED TO PRODUCE AN EMULSION COPOLYMERIZATE OF ABOUT 10 TO 25% BY WEIGHT OF ACRYLONITRILE, ABOUT 10 TO 60% BY WEIGHT OF STYRENE, AND ABOUT 30 TO 80% BY WEIGHT OF BUTADIENE.
Claim 2
Dependent Claim
146 words
A PROCESS FOR MAKING A SOLVENT-RESISTANT COPOLYMER WHICH COMPRISES FORMING AN AQUEOUS PHASE COMPOSED OF A WATER SOLUTION OF AN EMULSIFYING AGENT; ADDING TO SAID AQUEOUS PHASE FROM ABOUT 15 TO 100 PARTS BY WEIGHT OF A 90 TO 10% BUTADIENE- 10 TO 90% STYRENE COPOLYMER IN THE FORM OF A COMPLETELY FINISHED LATEX, SAID LATEX BEING SUBSTANTIALLY DEVOID OF FREE MONOMERS AND CATALYST, A WATER SOLUBLE PEROXYGEN CATALYST, AND ABOUT 100 PARTS BY WEIGHT OF A MONOMER COMPOSITION OF BUTADIENE, STYRENE AND ACRYLONITRILE; AND MAINTAINING THE RESULTING MIXTURE AT POLYMERIZATION TEMPERATURE UNTIL JPOLYMERIZATION OF THE ADDED MONOMER COMPOSITION HAS PROCEEDED TO FROM 90 TO 100% OF COMPLETE CONVERSION; THE ADDED MONOMER COMPOSITION BEING ADJUSTED TO PRODUCE AN EMULSION COPOLYMERIZATE OF ABOUT 10 TO 25% BY WEIGHT OF ACRYLONITRILE, ABOUT 10 TO 60% BY WEIGHT OF STYRENE, AND ABOUT 30 TO 80% BY WEIGHT OF BUTADIENE.
Claim 3
Dependent Claim
10 words
THE POLYMER MADE ACCORDING TO THE PROCESS OF CLAIM 1.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |