Catalyst useful for the polymerization of olefins

Details Catalyst useful for the polymerization of olefins Catalyst useful for the polymerization of olefins

1995-05-22

1996-10-01

Caldarola, Glenn A.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502103, 526160, 526129, B01J 3100

Patent

active

055610935

ABSTRACT:
A catalyst useful for the polymerization of olefins, comprising the following components (A) and (B):
Component (A):A transition metallic compound having the following formula [I]: ##STR1## wherein M:a transition metal selected from Ti, Zr and Hf; R.sup.1 :a monovalent C.sub.1-6 hydrocarbyl group, or a monovalent C.sub.1-6 hydrocarbyl group containing Si;
R.sup.2 :a divalent C.sub.4-20 hydrocarbyl group, or a divalent C.sub.4-20 hydrocarbyl group containing Si;
R.sup.3 :a divalent C.sub.1-30 hydrocarbyl group, or a divalent C.sub.1-30 hydrocarbyl group containing Si or Ge; and
X and Y:H, halogen, a monovalent C.sub.1-20 hydrocarbyl group, or a monovalent C.sub.1-20 hydrocarbyl group containing N, O or Si.
Component (B):Alumoxane having the following formula [II] or [III]: ##STR2## wherein m:4 to 30; and R.sup.4 :a monovalent hydrocarbyl group. A highly stereoregular polyolefin having a high molecular weight can be obtained by the above catalyst.

REFERENCES:
patent: 4871705 (1989-10-01), Hoel
patent: 5120867 (1992-06-01), Welborn
patent: 5145819 (1992-09-01), Winter et al.
CA 107:218226c (1987).
CA 103:6746q (1985).

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