Patent ID: 6313225
Filing Date: 2001-11-06
Classification: C08F,C08L,Y10S

Abstract:
A method for producing a propylene (co-)polymer composition by contacting propylene or a mixture of propylene and another monomer with a catalyst for olefin (co-)polymerization comprising a polyolefin producing catalyst, a polyethylene (A) and a polypropylene (B),wherein the polyethylene (A) and the polypropylene (B) are supported by the polyolefin producing catalyst,said polyolefin producing catalyst comprises (i) a transition metal compound catalytic component which contains at least a titanium compound, (ii) an organic metal compound (AL1), and (iii) an electron donor (E1),the content of said organic metal compound (AL1) is 0.01 to 1000 mole per mole of the transition metal atom, the content of said electron donor (E1) is 0 to 500 mole per mole of the transition metal atom,said polyethylene (A) has an intrinsic viscosity (.eta..sub.E) of 15 dl/g to 100 dl/g measured in tetrahydronaphthalene at 135.degree. C., the content of said polyethylene (A) is 0.01 to 5000 g per gram of the transition metal compound catalytic component,said polypropylene (B) has an intrinsic viscosity (.eta..sub.B) of less than 15 dl/g measured in tetrahydronaphthalene at 135.degree. C., and the content of said polypropylene (B) is 0.01 to 100 g per gram of the metal compound catalytic component.