Process for producing porous spherical polyvinyl chloride particles
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United States of America Patent
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Feb 23, 1988
Issued Date -
N/A
app pub date -
Apr 30, 1987
filing date -
Mar 31, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved process is provided for producing porous PVC resin particles by a thickened aqueous suspension polymerization process comprising polymerizing vinyl chloride monomer in an aqueous suspension wherein said aqueous medium contains at least one dispersant capable of thickening water, and optionally at least one secondary surfactant, at least one oil-soluble free radical generating catalyst, the improvement comprising charging said free radical catalyst as a solution wherein the solvent for said catalyst solution has a density equal to or less than that of the monomer being polymerized and the catalyst solution has a density less than water.
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