Continuity additives and their use in polymerization processes

摘要

The invention relates to catalyst compositions including at least one catalyst compound and at least one continuity additive such as poly-oxo-metal carboxylate compound and their use in the polymerization of olefins.

主权项

1. A catalyst composition comprising:
at least one catalyst compound, wherein the at least one catalyst compound is selected from the group consisting of a Ziegler-Natta catalyst, a Phillips-type chromium catalyst, a metallocene catalyst, a group 15-containing catalyst, and a combination thereof; and at least one poly-oxo-metal carboxylate compound; wherein the at least one poly-oxo-metal carboxylate compound is a liquid linear or cyclic compound represented by the formula:
(MQO)n wherein M is a metal selected from the group consisting of Al, Mg, Ca, Sr, Sn, Ti, V, Ba, Zn, Cd, Hg, Mn, Fe, Co, Ni, and Pd; Q is a carboxylate group having 2-24 carbons; O is oxygen; and n is an integer between 3 and 25.