| 摘要 |
<p>The invention concerns a new process for producing elastomer-containing vinyl chloride graft copolymerizates by suspension polymerization. An aqueous solution of precipitant is added to the elastomer dispersion containing water, the buffer and the inhibitor, and only when precipitation is complete are specified quantities of protective colloid, the graft monomer and possibly the controller added. The protective colloid used is polyvinyl alcohol having a degree of hydrolysis » 70 % and a viscosity » 5 cp.</p> |
