Patent ID: 7309741

Claim:
A polyolefin dry or melt blend comprising: (a) from 30 to 80 weight % of copolymer having a Mw from 30,000 to 75,000 as determined by GPC comprising from 85 to 99.95 weight % of ethylene and from 15 to 0.05 weight % of one or more C 4-8 alpha olefins having a density from 0.953 to 0.965 g/cm 3 and a melt flow rate (2.16 kg 190° C.) from 0.1 to 20.0 g/10 minutes, said copolymer being prepared in the presence of a chromium oxide catalyst; and (b) from 70 to 20 weight % of a high molecular weight copolymer comprising from 85 to 99.9 weight % of ethylene and from 15 to 0.1 weight % of one or more C 4-8 alpha olefins having a density from 0.922 to 0.935 g/cm 3 , a melt flow rate (21.6 kg 190° C.) from 0.05 to 5.0 g/10 minutes, and a polydispersity from 2 to 5 said copolymer being prepared with a phosphinimine catalyst of the formula: wherein M is selected from the group consisting of Ti, Hf and Zr; Pl is a phosphinimine ligand of the formula wherein R 3 is a C 1-6 alkyl radical, L is a ligand selected from the group consisting of cyclopentadienyl, indenyl and fluorenyl ligands which are unsubstituted or substituted by one or more substituents selected from the group consisting of a chlorine or fluorine atom, C 1-4 alkyl radicals, and benzyl and phenyl radicals which are unsubstituted or substituted by one or more halogen atoms, X is selected from the group consisting of a chlorine atom and C 1-4 alkyl radicals; m is 1; n is 1; and p is 2 and an activator.