Multilayer structure of polyamides and graft copolymers containing polyamide blocks

摘要

A multilayer structure based on polyamides and copolymers grafted with polyamide blocks comprising a first layer of polyamide or a mixture of polyamide and polyolefin with a polyamide matrix, optionally a binder layer and a layer based on a copolymer grafted with polyamide blocks with a polyolefin backbone and at least one polyamide graft. The grafts are attached to the backbone by residues of an unsaturated monomer with a functional group capable of reacting with a polyamide with an amine terminal group. The monomer is fixed to the skeleton by grafting or copolymerization from the double bond. The layers are successive an adhere to one another. Independent claims are included for reservoirs, containers, bottles, multilayer films and tubes consisting of the claimed structure, with the third layer in contact with the liquid being stored or transported and for tubes for the cooling circuits of internal combustion engines where the third layer forms the internal layer in contact with the fluid being transported.