Patent US2624724A successfully refreshed from Google Patents.
US2624724A
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Polymerization of vinyl chloride in an aqueous emulsion
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-02-26
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Granted: 1953-01-06
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Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Harold F Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:24
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS WHICH CONSISTS OF POLYMERIZING VINYL CHLORIDE IN AN AQUEOUS EMULSION AT A PH OF 5-8 IN THE PRESENCE OF A WATER-SOLUBLE PER COMPOUND CATALYST AND AN ALKALI METAL SULFONATE DISPERSING AGENT AND RECOVERING THE POLYMER BY EVAPORATING THE WATER FROM THE RESULTING EMULSION, THE WEIGHT RATIO OF WATER TO VINYL CHLORIDE BEING NOT LOWER THAN 30:70, THE AMOUNT OF DISPERSING AGENT VARYING BETWEEN 0.01 AND 0.5 PART PER 100 PARTS OF MONOMER, THE AMOUNT OF CATALYST ON A WEIGHT BASIS BEING SUCH AS TO INTRODUCE FOR EVERY 100 PARTS OF MONOMER, NOT OVER THE AMOUNT OF AVAILABLE OXYGEN CONTAINED IN 0.06 PART OF POTASSIUM PERSULFATE AND NOT OVER 0.01 NOR LESS THAN 0.00001 PART OF AVAILABLE OXYGEN FOR EVERY 100 PARTS OF WATER.
Claim 2
Dependent Claim
125 words
A PROCESS WHICH CONSISTS OF POLYMERIZING VINYL CHLORIDE IN AN AQUEOUS EMULSION AT A PH OF 5-8 IN THE PRESENCE OF A WATER-SOLUBLE PER COMPOUND CATALYST AND AN ALKALI METAL SULFONATE DISPERSING AGENT AND RECOVERING THE POLYMER BY EVAPORATING THE WATER FROM THE RESULTING EMULSION, THE WEIGHT RATIO OF WATER TO VINYL CHLORIDE BEING NOT LOWER THAN 30:70, THE AMOUNT OF DISPERSING AGENT VARYING BETWEEN 0.01 AND 0.5 PART PER 100 PARTS OF MONOMER, THE AMOUNT OF CATALYST ON A WEIGHT BASIS BEING SUCH AS TO INTRODUCE FOR EVERY 100 PARTS OF MONOMER, NOT OVER THE AMOUNT OF AVAILABLE OXYGEN CONTAINED IN 0.06 PART OF POTASSIUM PERSULFATE AND NOT OVER 0.01 NOR LESS THAN 0.00001 PART OF AVAILABLE OXYGEN FOR EVERY 100 PARTS OF WATER.
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |