Rotationally Molded Articles For Food Contact Applications
AssigneeCelanese International Corporation
InventorsDarin Grinsteinner, Adam Larkin
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Abstract
A polymer composition containing a polyoxymethylene polymer in the form of particles for rotational molding applications is disclosed. The polyoxymethylene polymer is selected to have physical characteristics and is combined with one or more impact modifiers in order to produce hollow vessels and other articles having improved physical properties, such as impact strength resistance. The polymer composition of the present disclosure is particularly formulated so as to be food contact grade compliant.
Claims22
A polymer composition for rotational molding applications comprising:
- polymer particles comprising a polyoxymethylene polymer blended with an impact modifier, the impact modifier comprising a thermoplastic elastomer, the polyoxymethylene polymer having a melt flow rate of less than about 5 g/10 min, the polyoxymethylene polymer being present in the polymer composition in an amount of at least about 55% by weight, the impact modifier being present in the polymer composition in an amount of from about 4% by weight to about 27% by weight, and wherein the polymer particles further comprise a nucleant and an antioxidant, the polymer particles having an average particle size of from about 250 microns to about 800 microns.
A polymer composition for rotational molding applications comprising:
- polymer particles comprising a polyoxymethylene polymer blended with an impact modifier, the impact modifier comprising a thermoplastic elastomer, the polyoxymethylene polymer having a melt flow rate of less than about 10 g/10 min, the polyoxymethylene polymer being present in the polymer composition in an amount of at least about 55% by weight, the impact modifier being present in the polymer composition in an amount from about 4% by weight to about 27% by weight, the polymer particles having an average particle size of from about 250 microns to about 800 microns, the polymer composition further containing a masterbatch comprising a coloring agent in combination with a carrier polymer, the coloring agent being present in the polymer composition in an amount less than about 1% by weight, the polymer composition displaying a Delta E color shift according to SAE Test J2527 at 500 kJ/m2 of less than about 10.
Dependencies are inferred from the claim text.