Patent ID: 8969482
Filing Date: 2015-03-03
Classification: C08F

Abstract:
1. A process to alter comonomer distribution in a copolymer (as compared to a copolymer made under the same conditions absent the Lewis base modifier) comprising contacting ethylene and one or more C 3 to C 40 comonomers; with a catalyst system consisting essentially of: 1) Lewis base modifier present at greater than 1:1 molar ratio of Lewis base modifier to activator, where the Lewis base modifier is represented by the formula: where, z is 0 or 1, y is 0 or 1, a is the valence of X and is 2 or 3, and z y 2 n, X is a group 15 atom, Z is N or P, R 1 , R 4 , and R 5 each, independently, are hydrogen, a heteroatom, a substituted heteroatom, or a substituted or unsubstituted alkyl or substituted gar unsubstituted aryl, R 2) activator and optional co-activator; and 3) metallocene catalyst compound represented by the formula: where; M is a Group transition 4 metal; z is 1 indicating the presence of a bridging group T, each X′ is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and a combination thereof, (two X′ groups may form a part of a fused ring or a ring system), each R is, independently, hydrogen, or a C