US 7,465,775 B2
	Process for the production of polypropylene using high yield Ziegler-Natta catalysts
Torvald Vestberg, Porvoo (Finland); and Pirjo Jääskeläinen, Porvoo (Finland)
Assigned to Borealis Technology Oy, Porvoo (Finland)
Appl. No. 10/559,484 PCT Filed Jun. 04, 2004, PCT No. PCT/EP2004/006053 § 371(c)(1), (2), (4) Date May 02, 2006, PCT Pub. No. WO2004/111098, PCT Pub. Date Dec. 23, 2004.
Claims priority of application No. 03012906 (EP), filed on Jun. 06, 2003.
Prior Publication US 2006/0235172 A1, Oct. 19, 2006
Int. Cl. C08F 210/06 (2006.01); C08F 4/64 (2006.01)

U.S. Cl. 526—348  [526/123.1; 526/124.2; 526/124.3; 502/104; 502/115]

5 Claims

1. A polypropylene composition comprising a propylene copolymer with flexural modulus FM as expressed in MPa which is measured according to ISO 178 and complies with relation (2): FM≤1700−225Et  (2) wherein Et denotes the amount of ethylene in the polymer in wt.-% and Et is in the range of 0≤Et<3.5.