1-OLEFIN-STEREOBLOCKPOLYMER UND VERFAHREN ZU SEINER HERSTELLUNG.

摘要

Stereoblock polymers of 1-olefin (I) of formula RCH=CH2, where R = 1-28C alkyl, with alternating isotactic sequences of opposed configuration having 3 or more monomer units in the mol. chain and a uni-, bi-, tri-, or multimodal mol. mass distribution are claimed. Prepn. of 1-olefin stereoblock polymers by polymerising a (I) at -60 to +100 deg.C under 0.5-60 bar, in soln., suspension, or gas phase, in presence of, as catalyst, (A) metallocene of formula (I), Me = metal of gp. IVb, Vb, or VIb; R1, R2 = 1-10C alkyl, 6-10C aryl, 2-10C alkenyl, or 7-40C arylalkyl; R3, R4 = H or CH3; R5, R6 = halogen, 1-10C alkyl, 6-10C aryl, 2-10C alkenyl, 7-40C arylalkyl, or 8-40C arylalkenyl; m = 2, 3 or 4; (B) a linear alumoxan of formula Al2OR74-(-Al(R7)-O-)n- and/or a cyclic alumoxan of formula -(-Al(R7)-O-)n+2- where R7 = CH3, Et, or isoBu; n = 4-20.