Carbon nanotube masterbatch, preparation thereof, and use in forming electrically conductive thermoplastic composition

摘要

An electrically conductive thermoplastic composition is prepared by melt blending a polymer and a masterbatch of carbon nanotubes in wax having a melting point of about 45 to about 150° C. The masterbatch of carbon nanotubes in wax is more easily prepared than a conventional carbon nanotube masterbatch in high molecular weight polymer. Use of the masterbatch of carbon nanotubes in wax also improves the melt flow properties of the electrically conductive thermoplastic composition.

主权项

1. A method of forming an electrically conductive thermoplastic composition, comprising:
melt blending
about 80 to about 98 weight percent, based on the weight of the electrically conductive thermoplastic composition, of a polymer, andabout 2 to about 20 weight percent, based on the weight of the electrically conductive thermoplastic composition, of a carbon nanotube masterbatch comprising, based on the weight of the carbon nanotube masterbatch,
about 10 to about 40 weight percent of carbon nanotubes, andabout 60 to about 90 weight percent of a wax having a melting point of about 45 to about 150° C. wherein the wax comprises a fatty acid ester selected from the group consisting of glycerol monostearate, ethylene glycol montanate, glycerol montanate, pentaerythritol tetrastearate, trimethylolpropane tristearate, sorbitan tristearate, and combinations thereof.