B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/735
B29C 47/12 (2006.01) B29C 47/00 (2006.01) C08L 23/02 (2006.01) D01D 4/02 (2006.01)
Patent
CA 2027098
TITLE Improved Process For Melt Extrusion of Polymers ABSTRACT OF THE DISCLOSURE The invention is a process comprising melt extruding through an extrusion die a composition comprising a difficulty-melt-processible polymer and 0.002 - 2 parts by weight, based on the weight of the polymer, of at least one melt-processible fluorocarbon polymer processing aid, said fluorocarbon polymer processing aid having a fluorine to carbon ratio of at least 1:2, wherein the extruder die surface is coated with one or more metal oxides, MxOy, wherein M is a metal selected from the group Ti, Zr, Cr, Fe, Ni, Pd, Pt, Cu, Ag, Au, Al and Si, and x and y are selected to satisfy the valencies of M, and wherein said fluorocarbon polymer has incorporated therein metal oxide-reactive sites capable of reacting with or physically associating with the metal oxide die surface.
Chapman George Richard Jr.
Mcminn Rita Sue
Phillips William Lewis
Priester Donnan Edwin
E. I. Du Pont de Nemours And Company
Sim & Mcburney
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