Method for incorporating solids into polymers
AssigneeBayer MaterialScience AG
InventorsUdo Dünger, Thomas König
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Abstract
The invention relates to a method for incorporating solids into polymers by means of a tightly meshing twin-screw or multi-screw compounder for producing a polymer composite material. The method according to the invention is especially used to incorporate solids, such as carbon nanotubes, that significantly increase the viscosity in the polymer melt.
Claims14
Process for the production of a polymer composite, in which at least one solid or solids mixture and one or more thermoplastic polymers are mixed in a co-rotating, tightly meshing screw extruder and then extruded, characterised in that the screw extruder has a ratio of the melt-wetted length Lmelt to the barrel inside diameter D of the screw extruder in the range from Lmelt/D=4 to Lmelt/D=19, and the standardised volumetric throughput Q/(N*D3) is in the range from 0.08 l/s to 1.0 l/s, wherein Q is the volumetric throughput and N is the number of screw shafts.
Dependencies are inferred from the claim text.