Polypropylene with low isotacticity and high molecular weight is synthesized using specific C2-symmetric doubly bridged metallocene complexes. This polymer possesses some isotactic sequences in random order. Though it is the homopolymer of propylene, it is a characteristic polymer having low melting point, transparency and elasticity. This soft polypropylene does not have the drop in the glass transition temperature, and the drop in the compatibility to polypropylene in comparison with propylene copolymer, which is a kind of the conventional soft polypropylene.
- Yutaka Minami
- Tomoaki Takebe
- Takuji Okamoto
