Chevron Phillips Chemical Company LP

Bryan Hauger

Rex L Bobsein

William R Coutant

Elizabeth Mary Lanier

John R Rathman

A method comprising forming a polymeric composition by adding zinc oxide to a polymer wherein a pipe formed from the polymeric composition displays a time to failure as determined in accordance with ASTM F2263-07(E1) that is increased by greater than about 25% when compared to an otherwise similar pipe formed from a polymeric composition lacking zinc oxide. A pipe comprising polyethylene and greater than about 0.5 wt. % zinc oxide having a time to failure as determined in accordance with ASTM F2263-07(E1) that is at least about 25% greater than an otherwise similar pipe prepared in the absence of zinc oxide. A method comprising forming a composition comprising a polymer and zinc oxide into an article, and testing the structural integrity of the article when exposed to chlorinated water wherein the zinc oxide is present in an amount of from about 500 ppm to about 10000 ppm.

Polyethylene additive compositions and articles made from same

The whiteness and stability after processing of a polyolefin have been found to be improved upon the addition of a combination of at least one high activity phosphite and at least one hydrolytically stable phosphite.

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Bartlesville, OK, United States of America

Bryan Hauger