Nanostructured thermoplastic polyamide-grafted polyolefin composition

A thermoplastic composition consisting of a first copolymer and a second elastomeric copolymer, these two copolymers being grafted by a plurality of polyamide grafts, and optionally, a third copolymer and/or an adjuvant, wherein:

• the first grafted copolymer consists of a polyolefin backbone containing a residue of at least one unsaturated monomer (X) and a plurality of polyamide grafts, the polyamide grafts are attached to the polyolefin backbone by the residue of the unsaturated monomer (X) comprising a function capable of reacting by a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, the residue of the unsaturated monomer (X) is fixed to the backbone by grafting or copolymerization;
• the second copolymer consists of a grafted elastomeric copolymer consisting of a polyolefin backbone selected from a maleicized ethylene-propylene copolymer, a maleicized ethylene-butene copolymer, a maleicized ethylene-hexene copolymer, a maleicized ethylene-octene copolymer, a maleicized ethylene-methyl acrylate copolymer, and a plurality of polyamide grafts;
• and
• the third copolymer, when present, is a copolymer of ethylene and acrylate and different from the first and second copolymers;
• wherein the following weight ratios are satisfied:
• between 10% and 70% by weight of the composition, with or without the third copolymer, for the polyolefin backbone of the first copolymer,
• between 10% and 70% by weight of the composition, with or without the third copolymer, for the polyolefin backbone of the second copolymer,
• between 15% and 25% by weight of the composition, with or without the third copolymer, for the polyamide grafts (fixed to the first and second copolymer), and
• wherein the adjuvant is present in the composition and is selected from the group consisting of a plasticizer, an adhesion promoter, a UV stabilizer and/or a UV absorber, an antioxidant, a flame retardant, and a dyeing/whitening agent.