US3230206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of copolymers having an extremely heterogeneous structure
Assignee: Hoechst AG
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Filing: 1960-11-15
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Granted: 1966-01-18
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Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Albert Walter
- 👤 Bohn Lothar
- 👤 Oberst Hermann
- 👤 Paschke Eberhard
- 👤 Pfister Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F2/00; C08F2/12; C08F2/16; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR THE MANUFACTURE OF A COPOLYMER HAVING IMPROVED THERMAL STABILITY UNDER LOAD AND IMPROVED LOW TEMPERATURE IMPACT STRENGTH FROM A TOTAL QUANTITY OF MONOMERS CONSISTING ESSENTIALLY OF 30-95 PERCENT BY WEIGHT OF VINYL CHLORIDE AND 70-5 PERCENT BY WEIGHT OF 2-ETHYLHEXYL ACRYLATE, WHICH PROCESS COMPRISES COPOLYMERIZING ALL OF SAID ACRYLATE ESTER IN AN AQUEOUS PHASE WITH A PORTION OF VINYL CHLORIDE, THE WEIGHT RATIO OF VINYL CHLORIDE TO SAID ESTER BEING BELOW 9 BUT GREATER THAN ZERO, UNTIL 5-20 PERCENT BY WEIGHT OF SAID TOTAL QUANTITY OF MONOMERS IS POLYMERIZED, THEN ADDING THE REMAINING PORTION OF SAID VINYL CHLORIDE TO THE AQUEOUS PHASE AND CONTINUING THE POLYMERIZATION UNTIL ABOUT 85 PERCENT BY WEIGHT OF SAID TOTAL QUANTITY OF MONOMERS IS POLYMERIZED.
Claim 2
Independent Claim
123 words
A METHOD FOR THE MANUFACTURE OF A COPOLYMER HAVING IMPROVED THERMAL STABILITY UNDER LOAD AND IMPROVED LOW TEMPERATURE IMPACT STRENGTH FROM A TOTAL QUANTITY OF MONOMERS CONSISTING ESSENTIALLY OF 30-95 PERCENT BY WEIGHT OF VINYL CHLORIDE AND 70-5 PERCENT BY WEIGHT OF 2-ETHYLHEXYL ACRYLATE, WHICH PROCESS COMPRISES COPOLYMERIZING ALL OF SAID ACRYLATE ESTER IN AN AQUEOUS PHASE WITH A PORTION OF VINYL CHLORIDE, THE WEIGHT RATIO OF VINYL CHLORIDE TO SAID ESTER BEING BELOW 9 BUT GREATER THAN ZERO, UNTIL 5-20 PERCENT BY WEIGHT OF SAID TOTAL QUANTITY OF MONOMERS IS POLYMERIZED, THEN ADDING THE REMAINING PORTION OF SAID VINYL CHLORIDE TO THE AQUEOUS PHASE AND CONTINUING THE POLYMERIZATION UNTIL ABOUT 85 PERCENT BY WEIGHT OF SAID TOTAL QUANTITY OF MONOMERS IS POLYMERIZED.
References Cited (Backward Citations)
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Cited
US2746944A
Cited
US2777836A
Cited
US2800465A
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US2967855A
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US3141870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |