Vinyl chloride polymerization process and pvc obtained with...

Details Vinyl chloride polymerization process and pvc obtained with... Vinyl chloride polymerization process and pvc obtained with...

C - Chemistry, Metallurgy

08

F

402/546

C08F 14/06 (2006.01) C08F 2/20 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2037684

Process for the suspension polymerization of vinyl chloride, either pure or mixed with other monomers, to produce PVC resins. The process uses, as suspending agent, a newly structured polyvinyl alcohol, so as to obtain PVC resins substantially exempt from closed cells and having an improved thermal stability, no electrostatic charges and a low content of ions of alkaline or earthy-alkaline metals, which make them particularly suited for use as insulating materials in the electrical field.

Méthode de polymérisation en suspension de chlorure de vinyle, soit sous forme pure, soit sous forme de mélange avec d'autres monomères, pour l'obtention de résines de PVC. Le procédé utilise comme agent de suspension un alcool polyvinylique à nouvelle structure, de façon à obtenir des résines de PVC pratiquement exemptes de cellules fermées, possédant une stabilité thermique améliorée, dépourvues de charges électrostatiques et à faible teneur en ions de métaux alcalins ou alcalino-terreux, ce qui les rend particulièrement utiles comme matières isolantes dans un champ électrique.

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