Patent ID: 7875691

Claim:
A polyethylene composition comprising: (A) a fraction of a copolymer of ethylene with one or more alpha-olefins, with a weight average molecular weight M w of 500,000 g/mol or more, the copolymer having a comonomer content from 1 to 20 mol %; (B) a first ethylene homo- or copolymer reaction; and (C) a second ethylene homo- or copolymer fraction; wherein fractions (B) and (C) are different from fraction (A), and wherein fraction (B) has a lower average molecular weight than fraction C; and wherein: (i) the composition has an MFR 2 of 0.05 to 100 g/10 min, and (ii) the environmental stress crack resistance ESCR measured according to the FNCT at 12 MPa and 23° C. in hours and the E-modulus EM measured according to ISO 527-2:1993 satisfy the following relation: ESCR≧−0.244 EM h/MPa+456 h.