US2829134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing vinyl chloride in aqueous emulsion
Assignee: Solvic SA
•
Filing: 1954-03-26
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Granted: 1958-04-01
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Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Coene Robert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:00
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR POLYMERIZING VINYL CHLORIDE IN AQUEOUS EMULSION WHICH COMPRISES INTRODUCING VINYL CHLORIDE MONOMER INTO A POLYMERIZATION ZONE CONTAINING AT LEAST ONE WATER INSOLUBLE ORGANIC CATALYST EFFECTIVE TO POLUMERIZE MONOMERIC VINYL CHLORIDE, AND AN EMULSIFYING AGENT IN AN AMOUNT OF AT LEAST TWO PERCENT BY WEIGHT CALCULATED ON THE WEIGHT OF THE MONOMERIC VINYL CHLORIDE INTRODUCED, SAID MONOMER BEING INTRODUCED CONTINUOUSLY AT A RATE SUCH THAT THE PRESSURE IN THE POLYMERIZATION ZONE IS AS HIGH AS POSSIBLE BUT LOWER THAN THE SATURATION PRESSURE OF THE MONOMERIC VINYL CHLORIDE AT THE POLYMERIZATION TEMPERATURE, WHEREBY SAID MONOMER REMAINS IN GASEOUS FORM AT ALL TIMES AND A STABLE LATEX OF POLYVINYL CHLORIDE IS FORMED, INTERRUPTING INTRODUCTION OF SAID MONOMER, AND REMOVING THE LATEX FROM SAID ZONE.
Claim 2
Dependent Claim
124 words
A PROCESS FOR POLYMERIZING VINYL CHLORIDE IN AQUEOUS EMULSION WHICH COMPRISES INTRODUCING VINYL CHLORIDE MONOMER INTO A POLYMERIZATION ZONE CONTAINING AT LEAST ONE WATER INSOLUBLE ORGANIC CATALYST EFFECTIVE TO POLUMERIZE MONOMERIC VINYL CHLORIDE, AND AN EMULSIFYING AGENT IN AN AMOUNT OF AT LEAST TWO PERCENT BY WEIGHT CALCULATED ON THE WEIGHT OF THE MONOMERIC VINYL CHLORIDE INTRODUCED, SAID MONOMER BEING INTRODUCED CONTINUOUSLY AT A RATE SUCH THAT THE PRESSURE IN THE POLYMERIZATION ZONE IS AS HIGH AS POSSIBLE BUT LOWER THAN THE SATURATION PRESSURE OF THE MONOMERIC VINYL CHLORIDE AT THE POLYMERIZATION TEMPERATURE, WHEREBY SAID MONOMER REMAINS IN GASEOUS FORM AT ALL TIMES AND A STABLE LATEX OF POLYVINYL CHLORIDE IS FORMED, INTERRUPTING INTRODUCTION OF SAID MONOMER, AND REMOVING THE LATEX FROM SAID ZONE.
References Cited (Backward Citations)
US2511593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |