| 摘要 |
<p>Process for preparing a vinyl chloride polymer, comprising a step of polymerization of at least vinyl chloride, performed in aqueous dispersion in the presence of at least one liposoluble radical initiator and of an activating system comprising a water-soluble transition metal salt and a complexing agent, and continued up to the point of reduction of the autogenous pressure of the vinyl chloride. The water-soluble salt is a zinc salt that is introduced at the very latest at the start of the said polymerization step and the complexing agent is introduced from the start of the polymerization step and at the very latest up to the said pressure reduction.</p> |
