The dialkyl peroxydicarbonates with short alkyl chains, preferably diethyl and diisopropyl peroxydicarbonates, are used for the aqueous suspension polymerization of vinyl chloride, in the form of a solution in a dialkyl alkanedicarboxylate which is liquid and insoluble in water. The preferred solvents are hexanedicarboxylates (adipates) derived from adipic acid and from C.sub.6 -C.sub.10 alkanols. The peroxydicarbonate concentration of the said solutions is generally 15-40% by weight. The process according to the invention produces vinyl chloride polymers of improved quality resulting in shaped articles exhibiting markedly fewer fisheyes.

Os peroxydicarbonates dialkyl com as correntes alkyl curtas, os peroxydicarbonates preferivelmente diethyl e diisopropyl, são usados para a polimerização aqueous da suspensão do cloreto de vinil, no formulário de uma solução em um alkanedicarboxylate dialkyl que seja líquido e insoluble na água. Os solventes preferidos são hexanedicarboxylates (adipates) derivados de ácido adipic e de C.sub.6 - alkanols C.sub.10. A concentração do peroxydicarbonate das soluções ditas é geralmente 15-40% pelo peso. O processo de acordo com a invenção produz polímeros do cloreto de vinil da qualidade melhorada tendo por resultado os artigos dados forma que exibem marcada poucos fisheyes.

 
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