Polymerization of vinyl chloride

• US 3,025,284 A
• Filed: 02/03/1958
• Issued: 03/13/1962
• Est. Priority Date: 02/03/1958
• Status: Expired due to Term

• Current Assignee: Marvin R. Frederick, Paul J. George
• Original Assignee: Marvin R. Frederick, Paul J. George
• Inventors: George, Paul J., Frederick, Marvin R.
• Application Number:
  US03/712,683
• Time in Patent Office: 1,499 Days
• US Class Current: 526/197
• CPC Class Codes: C08F 14/06 Vinyl chloride
• CPC Class Codes: C08F 2/16 Aqueous medium
• CPC Class Codes: C08F 4/00 Polymerisation catalysts
• CPC Class Codes: C08F 4/12 of boron, aluminium, gallium, indium, thallium or rare earths
• CPC Class Codes: C08F 4/32 Organic compounds
• CPC Class Codes: D01H 5/64 Rollers or aprons with cleaning surfaces
• CPC Class Codes: Y10S 260/25 Metal catalyst
• CPC Class Codes: Y10S 526/91 Suspending agents
• CPC Class Codes: Y10S 526/915 Redox catalyst

Claims

1. A PROCESS FOR PRODUCING POLYMERIZED VINYL CHLORIDE IN THE PRESENCE OF A BORANE-HYDROPEROXIDE CATALYST SYSTEM IN CIRCUMAMBIENT FLUID MEDIA SUBSTANTIALLY INERT TO THE BORANE OF THE CATLYST SYSTEM, WHICH PROCESS COMPRISES DISPERSING IN AN AQUEOUS MEDIUM VINYL CHLORIDE, AN ALKYL BORANE HAVING 2 TO 4 CARBON ATOMS,AND A HYDROPEROXIDE OF THE FORMULA ROOH, IN WHICH R IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS HAVING 1 TO 8 CARBON ATOMS, TO FORM WITHIN THE RESULTING AQUEOUS ADMIXTURE THE RESULTING AQUEOUS ADMIXITURE TO TEM;

THEN AGITATING THE RESULTING AQUEOUS ADMIXTURE TO PERMIT THE SAID CATALYST SYSTEM TO INITIATE AND TO ACTIVATE THE POLYMERIZED OF THE VINYL CHLORIDE UNTIL A YIELD OF POLYMERIZED VINYL CHLORIDE IS ATTAINED;

AND RECOVERING THE GRANULES OF POLYMERIZED VINYL CHLORIDE THUS PRODUCED.