| 摘要 |
PURPOSE:To obtain a polyvinyl chloride resin composition of improved processability, by mixing a specified three-stage polymer with a polyvinyl chloride resin-containing suspension polymerization solution, coprecipitating these polymers by the addition of a coagulant and separating the coprecipitate. CONSTITUTION:The following components I and II are mixed together in liquid form and a coagulant is added to the resulting mixture to coprecipitate components I and II. This coprecipitate is separated to obtain the purpose resin composition. Said component (I) is a suspension polymerization solution containing PVC containing at least 80wt%, based on the structural units, of vinyl chloride units. Said component (II) is an emulsion polymer containing a three-state polymer obtained by polymerizing MMA or its copolymerizable mixture (C) in the presence of a two-stage polymer comprising a polymer consisting of components A and B, obtained by polymerizing a mixture (B) of 1-18C alkyl (meth)acrylates in the presence of a (co)polymer containing at least 80wt%, based on the structural units, MMA units (A). |
