POLYURETHANE MATERIALS COMPRISING CARBON NANOTUBES
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Abstract
The invention relates to semicrystalline polyurethane (PU) compositions which have been filled with carbon nanotubes (CNTs) and have improved electrical properties, and which are obtainable on the basis of water-based polyurethane-CNT mixtures. The invention further relates to a process for producing the polyurethane compositions, in which water-based polyurethane latices are mixed with carbon nanotubes dispersed in water. The invention further relates to films produced by pressurized injection moulding processes or processing of casting solutions.
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Citations
37 Claims
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1-17. -17. (canceled)
- 18. An electrically conductive polyurethane composition comprising at least one polyurethane polymer and carbonaceous nanoparticles, wherein the at least one polyurethane polymer has a substantial portion of semicrystalline polyurethane, and wherein the carbonaceous nanoparticles comprise at least 20% carbon nanotubes.
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32. A process for producing an electrically conductive polyurethane composition, comprising
a) preparing an aqueous dispersion of carbonaceous nanoparticles, b) mixing the dispersion of the carbonaceous nanoparticles with an aqueous polyurethane dispersion, c) removing water from the mixture, d) hardening the dried product from step c) by applying heat, wherein the polyurethane dispersion is based on substantial amounts of semicrystalline polyurethane.
Specification