Continuous process for the removal of residual monomer from aqueous dispersions of homo- and copolymers of vinyl chloride

摘要

Aqueous dispersions of homo- and co-polymers of vinyl chloride are freed of residual monomer in a continuous manner by mixing the dispersion with steam in a first flow pipe maintained at reduced pressure; degasifying the mixture to a first degasification vessel maintained at a lower pressure; again mixing the degassed mixture with steam in a second flow pipe, also maintained at reduced pressure and having fluid flow diverting means therein; and then again degasifying the mixture in a second degasification vessel maintained at a lower pressure than the second flow pipe.