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US 2006/0223959 A1Published application
Method for producing propylene polymer having a very high melt-flowability
AssigneeSamsung Total
InventorsJoon-Ryeo Park, Young-Joo Lee, Jin-Kyu Ahn, Ho-Sik Chang
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Abstract
The present invention relates to a method for producing a propylene polymer having a very high melt flowability, specifically to a method for producing an isotactic propylene polymer having a dramatically improved melt flowability with a relatively high production yield in convenient way, by improving the reactivity of hydrogen that is served as a molecular weight controlling agent in propylene polymerization.
Claims12
A method for producing a propylene polymer by using a catalyst system for propylene polymerization, wherein the catalyst system comprises:
- a Ziegler-type catalyst as main catalyst component comprising magnesium, titanium, halogen and internal electron donor;
- an alkylaluminum compound as cocatalyst;
- and external electron donor comprising alkyltrialkoxysilane compound.
Dependencies are inferred from the claim text.