| 摘要 |
An agitated aqueous suspension process for producing porous, low-skin, agglomerated polyvinyl chloride resin particles comprises polymerizing vinyl monomer in the presence of a dispersant system consisting essentially of (a) from about 0.01 to about 0.03 part by weight per 100 parts by weight monomer of an unneutralized ion sensitive primary dispersant capable of thickening water, and (b) from about 0.1 to about 0.4 part by weight per 100 parts by weight monomer of a secondary dispersant; the low-skin product offers advantages such as faster uptake of plasticizer for a given porosity, and provides a purer product.
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