Patent ID: 7750104
Filing Date: 2010-07-06
Classification: C08F,C08L,Y10S

Abstract:
1. A composition comprising a shear thinning ethylene/α-olefin interpolymer, the interpolymer, having polymerized therein, ethylene and at least one α-olefin monomer, and wherein the interpolymer is characterized by a Processing Rheology Ratio (PRR) of at least eight, wherein PRR=(interpolymer Viscosity measured at 190° C. with a shear rate of 0.1 rad/sec)/(interpolymer Viscosity measured at 190° C. with a shear rate of 100 rad/sec)+[3.82−interpolymer Mooney Viscosity (ML wherein the interpolymer is formed in the presence of at least one constrained geometry metal complex, and wherein the interpolymer has a molecular weight distribution of at least 2.5, and wherein the interpolymer is polymerized in a loop reactor, in which the polymer concentration in the reactor, under steady state conditions, is from 10 to 20 weight percent, and the polymerization temperature is from 80° C. to 140° C.