Process for the manufacture of propylene hompolymer or...

Details Process for the manufacture of propylene hompolymer or... Process for the manufacture of propylene hompolymer or...

C - Chemistry, Metallurgy

08

F

18/1167, 400/205

C08F 10/06 (2006.01) C08F 8/50 (2006.01) C08L 23/12 (2006.01)

Patent

CA 1326316

ABSTRACT OF THE DISCLOSURE PROCESS FOR THE MANUFACTURE OF PROPYLENE HOMOPOLYMER OF COPOLYMER PELLETS The present invention relates to a process for the manufacture of propylene homopolymer or copolymer pellets in the presence of free radical generators so as to obtain non-sticky pellets with excellent reproducibility and to increase the melt index of the polymer during the pelletisation and of the subsequent conversion of the pellets into finished articles. The invention consists particularly in adding to the polymer two free radical generators, G1 and G2, the half-life of G2 being at least 20 times longer than that of G1 at the pelletisation temperature and in pelletising the polymer to which such addition has been made under conditions such that at least 80% by weight of G2 and not more than 20% by weight of G1 remain intact in the pellets and available for a subsequent decomposition during the conversion of the pellets into finished articles.

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