C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/20 (2006.01) B01F 17/52 (2006.01) C08F 14/06 (2006.01) C08F 16/06 (2006.01) C08L 29/04 (2006.01)
Patent
CA 2058416
Disclosed herein is a process for suspension polymerization of a vinyl polymer which comprises using as the suspending agent a polyvinyl ester polymer having an ionic group at an end thereof or a polyvinyl alcohol polymer having a degree of hydrolysis of 90 mol% or less which is obtained by hydrolysis of the above polyvinyl ester polymer. According to the above-mentioned process, vinyl polymer granules having a sharp granulometric dispersion, high bulk density, high plasticizer absorption and low vinyl monomer residue are obtained.
On divulgue ici un procédé pour la polymérisation en suspension d'un polymère vinylique, consistant à utiliser comme agent de suspension un polymère de type poly(ester vinylique), possédant un groupe ionique à l'une de ses extrémités, ou un polymère de type poly(alcool vinylique) avec un degré d'hydrolyse de 90 % molaire ou moins, obtenu par hydrolyse du poly(ester vinylique) ci-dessus. Selon le procédé mentionné plus haut, il est possible d'obtenir des granulés de polymère vinylique possédant une dispersion granulométrique étroite, une forte masse volumique apparente, un taux élevé d'absorption de plastifiant et une faible teneur en résidu de monomère vinylique.
Igarashi Kazunari
Maruyama Hitoshi
Takada Shigeki
Tanaka Taku
Yuki Ken
Kuraray Co. Ltd.
Smart & Biggar
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