Patent ID: 9187627
Filing Date: 2015-11-17
Classification: C08L

Abstract:
1. A multimodal polyethylene composition comprising: (a) from 20 ppm to 5,0000 ppm a nucleating agent selected from the group consisting of zinc glycerolate, calcium glycerolate, calcium hexahydrophthalate, zinc hexahydrophthlate, and mixtures thereof; (b) from 25 to 50 wt % of a first ethylene homopolymer component which has a density within the range of 0.965 g/cm (c) from 25 to 50 wt % of a second ethylene copolymer component which has a density within the range of 0.950 g/cm (d) from 25 to 50 wt % of a third ethylene copolymer component which has a density within the range of 0.905 g/cm wherein the multimodal polyethylene composition has a density from of 0.942 g/cm 3 to 0.959 g/cm 3 , a MI 2 from 0.2 dg/min to 30 dg/min, a crystallization half time less than or equal to 12 minutes at 124° C., and has an environmental stress cracking resistance of greater than or equal to 40 days, measured according to ASTM D 1693 condition B, in 100% Igepal, wherein the multimodal polyethylene composition has a crystallization half time less than or equal to 70% of the crystallization half time of the multimodal polyethylene without the nucleating agent, and wherein the first ethylene homopolymer component has a melt index MI 2 within the range of 50 dg/min to 250 dg/min, the second ethylene copolymer component has a melt index MI 2 within the range of 10 dg/min to 30 dg/min, and the third ethylene copolymer component has a melt index MI 2 within the range of 0.001 dg/min to 0.3 dg/min.