Use of carbon-based nanofillers at a very low content for the UV stabilization of composite materials

A method for improving the resistance to ageing with regard to UV light of a composite material comprising a polymeric composition, the method comprising:

• kneading a masterbatch comprising a carbon-based nanofiller to form a pre-composite material comprising from about 0.25% to about 3% by weight of the carbon-based filler relative to the total weight of the pre-composite material, the carbon-based nanofiller selected from the group consisting of carbon nanotubes, carbon nanofibres, graphene, and mixtures thereof;
• optionally, converting the pre-composite material to an agglomerated form;
• and
• introducing the pre-composite material into a polymer matrix to form the composite material, the composite material having a content of the carbon-based nanofillers between 1 ppm and 0.1% by weight relative to the total weight of the composite material,
• wherein the UV resistance is monitored by determination of the mechanical properties of the composite material after exposure to UV radiation for one month.