way of vinyl chloride from aqueous mixtures of polyvinyl chloride

摘要

1532399 Removing residual monomer from P.V.C. STAUFFER CHEMICAL CO 28 June 1977 [14 July 1976] 26964/77 Heading C3L [Also in Division B1] The procedure for removing monomer from aqueous vinyl chloride polymer mixtures by reduction of pressure and increase of temperature is improved by passing the mixture over a vibrating surface during the treatment. The surface is preferably undulating and/or inclined. Low monomer contents are preferably achieved by repeatedly recycling the mixture for further treatment.