Patent ID: 8709560

Claim:
A polymeric composition consisting essentially of: (i) from about 80 parts to 99.5 parts by weight per 100 parts by weight of the polymeric composition of a high density polyethylene polymer having an ethylene content of at least 80 mol % and a density of about 0.95 g/cm 3 , wherein the high density polyethylene polymer has a melting point of from about 120° C. to about 145° C., as determined by DSC; (ii) from about 1 part to about 20 parts by weight per 100 parts by weight of the polymeric composition of at least one second polymer component, wherein the second polymer component consists of at least 75 wt % propylene-derived units, from about 5 to about 25 wt. % ethylene-derived units, and optionally propylene-derived units, and wherein the second polymer component has a heat of fusion of less than 75 J/g, and wherein the propylene-derived units of the second polymer component have an isotactic triad fraction of about 75% to about 99%; and (iii) optionally one or more additives selected from the group consisting of fire retardants, antioxidants, plasticizers, pigments, vulcanizing accelerators, curative accelerators, cure retarders, processing aids, processing oils, flame retardants, tackifying resins, flow improvers, antiblocking agents, coloring agents, lubricants, mold release agents, nucleating agents, reinforcements, fillers, and mixtures thereof; wherein the polymeric composition and the high density polyethylene polymer each have an environmental stress crack resistance (F 100 ) of at least 24 hours determined according to ASTM D-1693; and a flex modulus determined according to ASTM D-790 of at least 410 MPa; and wherein the ratio of F 100 of the polymeric composition to the F 100 of the high density polyethylene polymer is at least 1.2.