Composition which is resistant to impact of polyamide and a mixture of at least a graft copolymer having polyamide blocks and the polymer of low density ethylenically

摘要

The present invention relates to a composition based on thermoplastic polyamide resistant to shock, comprising a mixture: - of 60 to 98% by weight of polyamide resin (a) and - of 2 to 40% by weight of a mixture of at least one grafted copolymer having polyamide blocks (b) consisting of a frustum of polyolefin and at least one scion of polyamide, in which the grafts are attached to the trunk by the residues of an unsaturated monomer (x) having a function which is capable of reacting with a polyamide at the end amine, the remnants of the unsaturated monomer (x) is fixed on the trunk by grafting or copolymerization from its double bond, and a non-reactive ethylenic polymer (c) which is miscible with (b) of low density lower than 0.915 g / cm 3, this composition has the properties of resistance to impact improved, as well as a fluidity satisfaisante.l' invention also relates to the process for obtaining said composition as well as its use for the manufacture of products or components obtained by injection molding or extrusion.