ELEMENT OF AN ENGINE COMPARTMENT OF A MOTOR VEHICLE AND METHOD OF PROTECTING THE ELEMENT AGAINST CHEMICAL ATTACKS FROM A METAL HALIDE

摘要

An element of an engine compartment of a motor vehicle and a method of protecting this element against chemical attacks by a metal halide is described. The element has at least one external layer of a wall having a thermoplastic composition based on polyamide. The thermoplastic composition is based on at least one polyamide that has at least one polymer chain with two ends comprising functional end groups. The at least one polyamide is selected from the group consisting of PA 6, PA 6.6 and mixtures thereof and the composition comprises the product of the reaction, preferably by reactive extrusion, of at least one bifunctional or multifunctional chain extender compound with at least one part of the functional groups. The element is capable of resisting prolonged contact with a metal halide of an alkaline, alkaline-earth or transition metal without breaking.

主权项

1. An element of an engine compartment of a motor vehicle, the element having an external mono-layer or multi-layer wall, said wall or at least one external layer of said wall comprising a thermoplastic composition based on at least one polyamide comprising at least one polymer chain comprising functional end groups, wherein said at least one polyamide is selected from the group consisting of PA 6, PA 6.6 and mixtures thereof and said composition comprises the product of a reaction of at least one bifunctional or multifunctional chain extender compound with at least some of said functional groups, the element being capable of resisting prolonged contact with a metal halide of an alkaline, alkaline-earth or transition metal without breaking.