Patent ID: 9279024
Filing Date: 2016-03-08
CPC Classification: C08F,C08L

Claim Text:
1. A process to polymerize propylene comprising: 1) contacting propylene, optionally with a comonomer, with a catalyst system comprising an activator and a catalyst compound represented by the formula: where: M is a group 4 metal; T is a bridging group; X is an anionic leaving group; each R each R wherein R′ is one of a halogen atom, a C R 2) polymerizing the propylene and optional comonomer for a time period, A; 3) adding hydrogen or other chain termination agent and optional comonomer to the polymerization after time period A; 4) polymerizing in the presence of at least 1 mmol hydrogen per mol of propylene for a time period, B, where time period A is at least as long as time period B and the hydrogen concentration during time period B is at least three times greater than the hydrogen concentration in time period A; and 5) obtaining a propylene polymer composition having: