FREE-FLOWING POWDERED POLYVINYL CHLORIDE COMPOSITIONS

摘要

Preparing a free-flowing powdered polyvinyl chloride composition by blending in a high speed mixer 20-65 weight percent of a high molecular weight solid ethylene-containing copolymer plasticizer, melt index not greater than 3000 g/10 minutes, dissolved in a low molecular weight plasticizer and 35-80 weight percent of porous polyvinyl chloride powder having substantially no skin and a porosity of from 0.1-0.7 ml/g so that the temperature during mixing is from 70-130 DEG C and recovering the free-flowing plasticized polyvinyl chloride powder.