Patent ID: 6884851
Filing Date: 2005-04-26
Classification: C08F

Abstract:
1. A polyolefin comprising a plurality of partially neutralized acid groups, said polyolefin having a melt flow index, measured at 230° C. under a load of 2.16 kg for propylene polymers according to ASTM D 1238 Standard and at 190° C. under a load of 5 kg for ethylene polymers according to ISO 1133 Standard, of from 0.001 to 1000 dg/min. and an improved melt strength characterized by an exponential increase in the elongational viscosity as a function of time and by an increase in the dynamic viscosity at low shear frequencies, wherein the polyolefin comprises ionic aggregates having a shape similar to a bunch of grapes, a size of said bunch being between 10 and 500 nm and a size of a grape being less than 50 nm.