C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2058, 400/65
C08F 2/34 (2006.01) C08F 10/06 (2006.01) C08F 4/66 (1985.01)
Patent
CA 1218784
ABSTRACT OF THE DISCLOSURE A superior high-rigidity and high-melt-viscoelasticity polypropylene for sheets to be post-processed and for blow molding is provided which polypropylene is produced by subjecting propylene to a multi-stage polymerization into polymer portions of two sections in the presence of a specified Ziegler Natta catalyst, the relationship between the intrinsic viscosities of the polymer portions of the respective sections being regulated within a speci- fied range and also the amount ratio of the polymer portions of the respective sections being regulated.
430378
Chiba Hiromasa
Kawazoe Shunji
Obama Kenjiro
Oka Takahiro
Satoh Akihiro
Chisso Corporation
Marks & Clerk
LandOfFree
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