Metallocene catalysts and their production and use

Details Metallocene catalysts and their production and use Metallocene catalysts and their production and use

1994-02-01

1994-10-25

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526113, 526118, 526119, 526127, 526160, 5263486, 502113, C08F 464

Patent

active

053590155

ABSTRACT:
An improved catalyst system and process of producing polyolefins having a controllable broadened molecular weight distribution utilizing transition metal metallocene catalyst systems, wherein at least one of the metallocenes has at least one cyclopentadienyl ring being substituted by at least one optionally substituent having a 2.degree. or 3.degree. carbon atom with which it is covalently bonded to the cyclopentadienyl ring. The method for forming the catalyst system of this present invention can be either by a physical or a chemical mixing process.

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patent: 4962248 (1990-10-01), Winter et al.
patent: 5132262 (1992-07-01), Rieger et al.

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