Patent ID: 8013082
Filing Date: 2011-09-06
Classification: C08F,Y10T

Abstract:
1. A process of polymerizing a mixture comprising ethylene, at least one α-olefin and 5-ethylidene-2-norbornene, said process comprising polymerizing the ethylene and the at least one α-olefin in the presence of 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the UV absorbances at the following wavelengths: 320 nm and 343 nm, in a neat sample of the 5-ethylidene-2-norbornene, contained in a quartz sample holder with a one centimeter pathlength; and wherein 5-ethylidene-2-norbornene is monitored by UV absorbance, and wherein the 5-ethylidene-2-norbornene having a sum of absorbances, at 320 nm and 343 nm, less than, or equal to, 0.31, is selected for polymerization.