FIELD: multilayer structure based on polyamides and graft polyamide block copolymers, as well as reservoirs, containers, bottles, laminated films, pipes that are obtained by combined extrusion or combined extrusion with inflation, as well as pipes for cooling systems of internal combustion engines, for example, engines of cars or trucks.
SUBSTANCE: the layers of a multilayer structure are positioned as follows: a the first layer is formed of polyamide (A) or a mixture of polyamide (A) and polyolefin (B) with polyamide matrix; (b) the second layer of binder is possible; (c) the third layer based on graft polyamide block copolymer, which contains the main polyolefin chain and at least one polyamide side component, in which the side components are added to the main chain with the id of the radicals of unsaturated monomer (x) containing a group that is capable of interaction with polyamide having a terminal amine group; the radicals of unsaturated monomer (x) are added to the main chain by means of graft copolymerization or copolymerization in its double bond. The quantities of the main polyolefin chain containing x(PO) and polyamide with the terminal amine group (PA) are such that PO/PA makes up 55/45 to 90/10. Layers (a),(b) and (c) follow one another and are bound in their respective contact zone. The multilayer structure may contain an additional layer of polyamide and polyolefin and probably a layer of binder.
EFFECT: improved mechanical properties.
