Thermoplastic composition, in particular for photovoltaic modules

A thermoplastic composition comprising at least a mixture of three polymers, wherein the three polymers consist of a first polymer, a second polymer, and a third polymer, in which:

• the first polymer, present in the composition at between 10% and 70% by weight, consists of a polyamide-grafted polymer having a polyolefin trunk containing a residue of at least one unsaturated monomer and a plurality of polyamide grafts, in which:
• the polyamide grafts are attached to the polyolefin trunk via the residue of the at least one unsaturated monomer comprising a function that is capable of reacting via a condensation reaction with a polyamide bearing at least one amine end group and/or at least one carboxylic acid end group,
• the residue of the at least one unsaturated monomer is attached to the polyolefin trunk by grafting or copolymerization,
• the polyamide grafts represent from 10% to 60% by weight of said polyamide-grafted polymer,
• the second polymer, present in the composition at between 10% and 90% by weight, consists of a copolymer of ethylene and of an unreactive or non-functionalized comonomer whose flexural elastic modulus is less than 250 MPa at 23° C. and which has a crystal melting point of between 60° C. and 120° C.,
• the third polymer, present in the composition at between 3% and 45% by weight of said composition, consisting of a functionalized polyolefin comprising a copolymer of at least one alpha-olefin with at least one comonomer bearing a reactive function, and at least one other comonomer not bearing a reactive function, chosen from the group consisting of an alpha-olefin different from the at least one alpha-olefin, a diene, an unsaturated carboxylic acid ester, a vinyl ester of a carboxylic acid, and a dicarboxylic acid anhydride,
• wherein the polyamide grafts of the first polymer have a glass transition temperature and a melting point of less than or equal to 160° C.,
• and the content of the polyamide grafts in said first polymer represents from 3% to 15% by weight of the thermoplastic composition.