Catalyst and method of broadening polymer molecular weight distr

Details Catalyst and method of broadening polymer molecular weight distr Catalyst and method of broadening polymer molecular weight distr

1992-04-09

1994-01-25

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, 526352, 502113, 502152, C08F 234, C08F 464

Patent

active

052816796

ABSTRACT:
A catalyst and method of producing polyolefins having broadened molecular weight distributions and enhanced tensile impact strengths utilizing a silica supported metallocene-alumoxane catalyst system, wherein at least one of the metallocenes has at least one cyclopentadienyl ring being substituted by at least one optionally substituted hydrocarbon substituent having a 2.degree. or 3.degree. carbon atom with which it is covalently bonded to the cyclopentadienyl ring.

REFERENCES:
patent: 4894734 (1989-10-01), Kioka et al.
patent: 4897455 (1990-01-01), Welborn, Jr.
patent: 4935474 (1990-06-01), Ewen et al.
patent: 4937301 (1990-06-01), Chang
patent: 5132262 (1992-07-01), Rieger et al.

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