US3337650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing graft polymers having high impact strength
Assignee: Union Carbide Corp
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Filing: 1966-12-09
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Granted: 1967-08-22
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Richard H Marcil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:41
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04; Y; Y10; Y10S; Y10S525/00; Y10S525/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
PROCESS FOR THE PREPARATION OF HIGH IMPACT STRENGTH ACRYLONITRILE/BUTADIENE/STYRENE POLYMERS WHICH COMPRISES DISSOLVING FROM ABOUT 5 PERCENT TO ABOUT 13 PERCENT POLYMERIC BUTADIENE RUBBER IN A MONOMER SOLUTION COMPRISING FROM ABOUT 1.5 TO9 PARTS BY WEIGHT STYRENE PER PART BY WEIGHT ACRYLONITRILE, FEEDING THE REACTION SOLUTION TO A PRIMARY REACTOR, POLYMERIZING SAID REACTION SOLUTION IN THE PRIMARY REACTOR, WHILE MAINTAINING THE STEADYSTATE SOLIDS LEVEL IN THE PRIMARY REACTOR AT ABOUT 15 TO ABOUT 40 PERCENT BY WEIGHT SOLIDS DURING POLYMERIZATION THEREIN; AND THEREAFTER FEEDING THE REACTION MIXTURE TO A SECONDARY REACTOR, POLYMERIZING THE REACTION MIXTURE IN THE SECONDARY REACTOR, WHILE MAINTAINING THE STEADY-STATE SOLIDS LEVEL IN THE SECONDARY REACTOR AT ABOUT 50 TO ABOUT 75 PERCENT BY WEIGHT SOLIDS DURING POLYMERIZATION THEREIN.
Claim 2
Dependent Claim
122 words
PROCESS FOR THE PREPARATION OF HIGH IMPACT STRENGTH ACRYLONITRILE/BUTADIENE/STYRENE POLYMERS WHICH COMPRISES DISSOLVING FROM ABOUT 5 PERCENT TO ABOUT 13 PERCENT POLYMERIC BUTADIENE RUBBER IN A MONOMER SOLUTION COMPRISING FROM ABOUT 1.5 TO9 PARTS BY WEIGHT STYRENE PER PART BY WEIGHT ACRYLONITRILE, FEEDING THE REACTION SOLUTION TO A PRIMARY REACTOR, POLYMERIZING SAID REACTION SOLUTION IN THE PRIMARY REACTOR, WHILE MAINTAINING THE STEADYSTATE SOLIDS LEVEL IN THE PRIMARY REACTOR AT ABOUT 15 TO ABOUT 40 PERCENT BY WEIGHT SOLIDS DURING POLYMERIZATION THEREIN; AND THEREAFTER FEEDING THE REACTION MIXTURE TO A SECONDARY REACTOR, POLYMERIZING THE REACTION MIXTURE IN THE SECONDARY REACTOR, WHILE MAINTAINING THE STEADY-STATE SOLIDS LEVEL IN THE SECONDARY REACTOR AT ABOUT 50 TO ABOUT 75 PERCENT BY WEIGHT SOLIDS DURING POLYMERIZATION THEREIN.
References Cited (Backward Citations)
CA641549A
Cited
US2694692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |