Extrusion of thermoplastic elastomers
AssigneeExxonMobil Chemical Patents Inc.
InventorsFelix M. Zacarias, Rachna Mohan, John Bowers
Life of this patent
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Abstract
A method of forming a thermoplastic vulcanizate by first providing a melt-blender having a die through which melt-blended thermoplastic vulcanizate passes to form a shaped article; wherein the die comprises a flow design having at least one flow branch having a taper angle and a flow reservoir at the end of each flow branch; and wherein the taper angle of the flow design ranges from 5 to 20 degrees; followed by melt-blending a thermoplastic and an elastomer with an organic peroxide curative in the melt-blender to form a thermoplastic vulcanizate; and finally, passing the melt-blended thermoplastic vulcanizate through the flow design to form the shaped article.
Claims9
A method for extruding a thermoplastic vulcanizate, the method comprising:
- (a) providing a melt-blender having a die through which melt-blended thermoplastic vulcanizate passes to form a shaped article;
- wherein the die comprises a flow design having at least one flow branch having a taper angle and a flow reservoir at the end of each flow branch;
- and wherein the taper angle of the flow design ranges from 5 to 20 degrees;
- (b) melt-blending a thermoplastic and an elastomer with an organic peroxide curative in the melt-blender to form a thermoplastic vulcanizate;
- (c) passing the melt-blended thermoplastic vulcanizate through the flow design to form the shaped article.
Dependencies are inferred from the claim text.