Catalyst component for olefin polymerization and catalyst...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S348000, C526S124200, C526S124300, C502S103000, C502S125000, C502S127000

Reexamination Certificate

active

11117093

ABSTRACT:
The present invention provides a catalyst component for polymerization of olefin CH2═CHR, in which R is hydrogen or C1-C12alkyl or aryl, comprising magnesium, titanium, a halogen and an electron donor compound (a) which is at least one selected from the group consisting of dibasic ester compounds of the formula (I), and said catalyst component optionally further comprising an electron donor compound (b) selected from the group consisting of aliphatic dicarboxylic esters and aromatic dicarboxylic esters, and/or an electron donor compound (c) selected from the group consisting of 1,3-diether compounds of formula (IV):wherein, R1, R′ and A are as defined in the description,wherein RI-RVIIIare as defined in the description, and a catalyst comprising the catalyst component.

REFERENCES:
patent: 4640906 (1987-02-01), Terano et al.
patent: 4725656 (1988-02-01), Kashiwa et al.
patent: 5166113 (1992-11-01), Schwager et al.
patent: 5844046 (1998-12-01), Ohgizawa et al.
patent: 1223267 (1999-07-01), None
patent: 1453298 (2003-11-01), None

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