Polymerisation in aqueous suspension of vinyl chloride

Details Polymerisation in aqueous suspension of vinyl chloride Polymerisation in aqueous suspension of vinyl chloride

C - Chemistry, Metallurgy

08

F

C08F 14/06 (2006.01) C08F 2/18 (2006.01) C08F 2/38 (2006.01)

Patent

CA 2441807

The invention concerns a method for polymerisation in aqueous suspension of vinyl chloride alone or mixed with another vinyl monomer, wherein the initiator comprises at least a compound selected among dialkyl peroxydicarbonates, peroxy-tert-alkanoates and diacyl peroxydes, and it consists in using, as short stopper of polymerisation, a stable nitroxyl radical. The resulting resins have good whiteness.

Dans le procédé selon l'invention pour la polymérisation en suspension aqueuse du chlorure de vinylique, l'amorceur de polymérisation comprend au moins un composé choisi parmi les peroxydicarbonates de dialkyle, les peroxy-tert- alcanoates et les peroxydes de diacyle et on utilise, comme agent d'arrêt de polymérisation, un radical stable de type nitroxyde. Les résines ainsi obtenues présentent une bonne blancheur.

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