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US 2026/0264309 A1Published application
Polyvinylpyrrolidone as Replacement for Fluorinated Polymer Processing Aids
AssigneeWestlake Longview Corporation
InventorRobert Louis ARECHEDERRA
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Abstract
Disclosed is a polymeric composition useful for making extruded products that can exhibit reduced melt fracture without the need to use perfluoroalkyl and polyfluoroalkyl substances (PFAS). The composition includes an ethylene-based polymer and a polymer processing aid containing polyvinylpyrrolidone (PVP). The PVP can effectively eliminate melt fracture without causing screw slip even at high loadings. The composition is particularly useful for making blown and cast films.
Claims20
A composition comprising:
- (a) an ethylene-based polymer;
- and
- (b) a polymer processing aid (PPA) comprising polyvinylpyrrolidone (PVP),
- wherein the PVP is present in an amount effective to reduce or eliminate melt fracture in a product extruded from the composition relative to a product extruded under the same conditions and from a corresponding composition without the PVP.
1 more element
A method of reducing melt fracture in an ethylene-based polymer product, the method comprising:
- adding a polymer processing aid (PPA) comprising polyvinylpyrrolidone (PVP) into an extrusion line comprising an ethylene-based polymer to form a product,
- wherein the PVP is added in an amount effective to reduce or eliminate melt fracture in the product relative to a product extruded under the same conditions and from the ethylene-based polymer without the PVP.
Dependencies are inferred from the claim text.