Patent ID: 6693161
Filing Date: 2004-02-17
Classification: C08F

Abstract:
Random propylene-ethylene copolymers having the following characteristics:content of ethylenic units of between 0.1 and 6% by weight; molecular weight distribution, in terms of (Mw/Mn), greater than 2.5; content of catalytic residues, expressed in terms of ppm of Ti, less than 15; natural logarithm of the weight percentage of xylene-soluble fraction and content by weight of ethylenic units, calculated on the basis of the total polymer, such that the point defined by such values falls below the straight line given by the equation: ln(Xs)=ln(a)+bC2 â€ƒin which Xs=% by weight of the fraction soluble in xylene at 25Â° C.; C2=% by weight of the ethylenic units in the copolymer; a=1.73; and b=0.29.