Propylene polymers

Details Propylene polymers Propylene polymers

2007-01-30

2007-01-30

Choi, Ling-Sui (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S142000, C526S124300, C526S123100, C526S107000

Reexamination Certificate

active

10965543

ABSTRACT:
The present invention relates to propylene polymers made by using catalyst components for the polymerization of olefins comprising Mg, Ti, halogen and at least two electron donor compounds, said catalyst component being characterized by the fact that at least one of the electron donor compounds, present in an amount from 20 to 50% by mol with respect to the total amount of donors, is selected from esters of succinic acids which are not extractable, under the conditions described below, for more than 25% by mol and at least another electron donor compound which is extractable, under the same conditions, for more than 35%. The said catalyst component are capable to give polymers with high xylene insolubility, high stereoblock content and broad MWD suitable for making the polymers usable in the BOPP sector.

REFERENCES:
patent: 4220554 (1980-09-01), Scatá et al.
patent: 4298718 (1981-11-01), Mayr et al.
patent: 4399054 (1983-08-01), Ferraris et al.
patent: 4469648 (1984-09-01), Ferraris et al.
patent: 4495338 (1985-01-01), Mayr et al.
patent: 4522930 (1985-06-01), Albizzati et al.
patent: 0395083 (1990-10-01), None
patent: 0553805 (1993-08-01), None
patent: 0553806 (1993-08-01), None
patent: 0601525 (1994-06-01), None
patent: 0658577 (1995-06-01), None
patent: 0982328 (2000-03-01), None
patent: 9844009 (1998-10-01), None
patent: 0063261 (2000-10-01), None
patent: WO 00/63261 (2000-10-01), None
X. King et al., “Temperature Rising Elution Fractionation of Polypropylene Produced by Ziegler-Natta Catalysts,”Eur. Polymer Journal, vol. 34, No. 3/4, p. 431-434 (1998).
P. Sobota et al., “Ionization of TiCl4and MgCl2during the Formation of a High-Activity α-Olefin Polymerization Catalyst. Crystal Structures of [cis-{C2H4(C02Et)2}2Cl2Ti][SbCl6]2·CH2Cl2and [Mg{C2H4(C02Et)2}3][MgCl4]·2CH2Cl2;”Inorg. Chem., vol. 35, p. 1778-1781 (1996).
Y. Inoue et al., “Studies of the stereospecific polymerization mechanism of propylene by a modified Zieger-Natta catalyst based on 125 MHz13C n.m.r. spectra,”Polymer, vol. 25, p. 1640-1644 (1984).
R. Chujo et al., “Two-site model analysis of13C n.m.r. of polypropylene polymerized by Ziegler-Natta catalyst with external alkoxysilane donors,”Polymer, vol. 35(2) p. 339-342 (1994).

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