Patent ID: 6232422
Filing Date: 2001-05-15
Classification: B01J,C01F,C01P,C08F,Y10S

Abstract:
A polypropylene homopolymer or copolymer thereof with at least one other C.sub.2 to C.sub.12 olefin consisting essentially of particles having a breadth of granulometric distribution expressed as D90/D10 lower than 15, wherein said particles have the form of essentially regular polyhedrons with six or eight faces in which the paired symmetrically opposite faces are essentially parallels two of which faces are large and elongated and form the top face and the bottom face of a polyhedron and have the form of a hexagon or of a lozenge such that on each of them the longest diagonal (D) is larger than the shortest distance (d) separating two opposite sides, which large elongated faces are surrounded essentially perpendicularly by the other essentially rectangular faces that form the sides of the said polyhedron wherein the ratio D/d of the majority of particles is between 2 and 7.