Process for polymerizing propylene by using a novel metallocene

Details Process for polymerizing propylene by using a novel metallocene Process for polymerizing propylene by using a novel metallocene

1996-09-25

1998-01-20

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526153, 526160, 526351, 5263482, 5263486, 526904, 526943, 556 12, 556 53, 502117, 502155, C08F 464

Patent

active

057102236

ABSTRACT:
A process for polymerizing propylene utilizes a metallocene catalyst component of the formula (I) ##STR1## wherein M is a transition metal, R.sup.1 is a C.sub.2-6 hydrocarbon, R.sup.2 is a C.sub.6-16 aryl group, X.sup.1 and X.sup.2 are each a halogen atom and Y is a divalent hydrocarbon or a divalent silicon-containing group. Propylene polymers produced thereby have such properties that the triad tacticity of propylene units is high, the proportion of inversely inserted units based on the 2,1-insertion of propylene monomer is in a specific range and the intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., is in a specific range.

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