| 摘要 |
The instant invention is a polymeric composition, process of producing the same, and articles made therefrom. The polymeric composition according to instant invention comprises: (1) a polyolefin, wherein said polyolefin is the polymerization reaction product of at least one or more a-olefins in the presence of a solvent via a solution polymerization reaction; and (2) a phenolic antioxidant. The polymeric composition contains less than 0.02 parts of copper per one million parts of the composition, and the polymeric composition has a whiteness index according to ASTM-D 6290 of equal or greater than [(-0.73 X)+(Wi)] where X is the number of days of accelerated aging, and Wi is the initial whiteness index at 0 days of accelerated aging. The process for producing the polymeric composition according to instant invention includes the following steps: (1) selecting a copper free polymerization system; (2) polymerizing at least one or more a-olefins in the presence of a solvent via a solution polymerization reaction in the copper free polymerization system; (3) thereby producing a polyolefin polymer; (4) melt blending a phenolic antioxidant into the polyolefin polymer; and (5) thereby producing the polymeric composition, wherein the polymeric composition contains less than 0.02 parts of copper per one million parts of the composition, and the polymeric composition has a whiteness index according to ASTM-D 6290 of equal or greater than [(-0.73 X)+(Wi)] where X is the number of days of accelerated aging, and Wi is the initial whiteness index at 0 days of accelerated aging. The articles according to instant invention comprise the above-described polymeric composition.
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