MULTIMODAL ETHYLENE-ALPHA-OLEFIN ELASTOMERS AND PROCESS FOR MAKING

摘要

Disclosed herein is a multimodal polymer composition comprising 45 to 75 wt% of a first polymer fraction, 25 to 55 wt% of a second polymer fraction, and from 10-50 phr of an extender oil. The multimodal polymer composition has an overall Mooney viscosity of less than 90 ML(1+4@125°C), and each polymer fraction comprises an ethylene, C3-C10 alpha-olefin, non-conjugated diene polymer, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125°C), the second polymer fraction has a Mooney viscosity from about 20 to about 120 ML(1+4@125°C). A process for making the multimodal polymer composition comprising a process utilizing two or more reactors in series is also disclosed.