Antistatic or electronically conductive polyurethanes, and method for the production thereof
AssigneeFuture Carbon GmbH
InventorsJens Krause, Bernd Breuer, Maren Heinemann, Ralf Jumel
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Abstract
The present invention relates to an antistatic or electrically conductive, thermoset polyurethane obtained by reacting A) an organic polyisocyanate; B) a compound comprising NCO-reactive groups; and C) optionally a catalyst, a blowing agent, an auxiliary, an additive, or mixtures thereof; and wherein, the polyurethane comprises a carbon nanotube present in an amount of from 0.1 to 15% by weight based on the total weight of the polyurethane.
Claims16
An antistatic or electrically conductive, thermoset polyurethane obtained by reacting:
- A) an organic polyisocyanate;
- B) a compound comprising NCO-reactive groups;
- and
- C) optionally a catalyst, a blowing agent, an auxiliary, an additive, or mixtures thereof;
- and
- wherein, the polyurethane comprises a carbon nanotube present in an amount of from 0.1 to 15% by weight based on the total weight of the polyurethane, and
- wherein the carbon nanotube has a proportion of from 30 to 90% by weight having a particle size of less than 40 μm;
- and a proportion of from 10 to 70% by
- weight having a particle size of from 40 to 1000 μm, wherein the carbon nanotubes having a particle size of from 40 to 1000 μm comprises more than 90% of particles having a diameter of from 100 to 200 μm.
A process for producing an antistatic or electrically conductive thermoset polyurethane comprising
- I) providing
- A) an organic polyisocyanate;
- B) a compound comprising NCO-reactive groups,
- C) optionally a catalyst, a blowing agent, an auxiliary, an additive, or mixtures thereof;
- and
- II) mixing carbon nanotubes into (A), (B), or a mixture thereof at a power density of from 102 kW/m3 to 1014 kW/m3, wherein the carbon nanotubes are present in an amount of from 0.1 to 15% by weight based on the total weight of (A) and (B);
- III) reacting (A) with (B) and optionally a catalyst, a blowing agent, an auxiliary, an additive, or mixtures thereof to form a composition;
- IV) introducing the composition into a mold or applying the composition to a substrate;
- V) curing the composition to form an antistatic or electrically conductive thermoset polyurethane article or curing the composition to form an antistatic or electrically conductive thermoset polyurethane coated substrate, and
- wherein the carbon nanotube has a proportion of from 30 to 90% by weight having a particle size of less than 40 μm;
- and a proportion of from 10 to 70% by weight having a particle size of from 40 to 1000 μm, wherein the carbon nanotubes having a particle size of from 40 to 1000 μm comprises more than 90% of particles having a diameter of from 100 to 200 μm.
Dependencies are inferred from the claim text.