Process for preparing polyvinyl chloride by suspension polymerization
Abstract
Abstract THE POLYMERIZATION IS CONDUCTED IN THE PRESENCE OF A FFIRST CATALYST HAING THE FORMULA: (CH3-C(-R1)(-CH3)-CH2-C(-CN)(-CH3)-N=)2 WHEREIN R1 IS A RADICAL SELECTED FROM THE GROUP CONSISTNG OF ALKYL, ALKOXY AND ARYL RADICALS HAVING FROM 1 TO 6 CARBON ATOMS, AND A SECOND CATALYST SELECTED FROM THE GROUP CONSISTING OF AZONITRILES HAVING THE FORMULA: (R2-CH(-CH3)-CH2-C(-CN)(-R3)-N=)2 WHEREIN R2 AND R3 ARE EACH AN ALKYL RADICAL HAVING FROM 1 TO 4 CARBON ATOMS, AND OIL-SOLUBLE ORGANIC PEROXIDES WHICH ARE SOLUBLE IN VINYL CHLORIDE MONOMERS. A POLYVINYL CHLORIDE HAVING SUPERIOR THERMAL STABILITY AND A DESIRABLE PARTICLE SIZE DISTRIBUTION IS OBTANED QUICKLY AND AT A HIGH CONVERSION RATE. ADDITIONALLY, POLYMER SCALE DEPOSITION ON THE INSIDE WALL OF THE POLYMERIZATION VESSEL IS REDUCED.
Inventors
- 👤 K Ogawa
- 👤 K Taguchi
- 👤 S Koyanagi
- 👤 H Kitamura
Bibliographic Details
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