Polymer compositions
AssigneeShell Polypropylene Company
InventorsJames D. McCullough, Thomas F. Brownscombe, Ananda M. Chatterjee
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Abstract
Polymer compositions comprising .alpha.-olefin polymers and a minor proportion of synthetic basic zeolite are stabilized against the harmful effects of corrosion of metal surfaces when processed through mechanical equipment such as molds and extruders where the composition normally contacts metal surfaces.
Claims22
A stabilized composition comprising a thermoplastic polymer and a stabilizing quantity of a synthetic basic zeolite, wherein the sum of any earlier applied basic material and Group II metal compound is greater than that required to fully cation exchange the zeolite when in the acid form.
A process for reducing the corrosivity of a thermoplastic polymer normally containing acidic impurities by incorporating therein a stabilizing quantity of a synthetic basic zeolite wherein the sum of any earlier applied basic material and Group II metal compound is greater than that required to fully cation exchange the zeolite when in the acid form.
Dependencies are inferred from the claim text.