Process for the production of thermoplastic elastomeric polyolefin alloys, including syndiotactic-atactic polypropylene alloys and isotactic- atactic polypropylene alloys, and catalysts therefore

摘要

This invention relates to thermoplastic elastomeric polyolefin alloys (preferably polypropylene alloys) and the processes for preparing naturally compatibilized polyolefin alloys using a "one-pot" polymerization of a single monomer (preferably propylene), whereby two homopolymers having different stereoisomeric structures are produced (preferably stereoregular and stereoirregular), as well as a third block copolymer having alternating sequences of the two structural segments of the two homopolymers; and wherein catalyst compositions are used enabling the direct synthesis of naturally compatibilized polymer blends comprising for components: two organometallic complexes of group IVB elements, a catalyst which irreversibly reacts with at least one ligand on the transition metal complexes converting it to catalytically active state, and a hydrocarbyl, substituted hydrocarbyl, or oxyhydrocarbyl compound of Group IIA, IIB, and IIIA metals, which functions as a cross- over agent.