Multilayer structure comprising at least one stabilized layer
AssigneeArkema France
InventorsVincent Ferreiro, Thibaut Montanari, Fabrice Montezin
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Abstract
The invention relates to a multilayer structure comprising at least two layers: a layer, referred to as the inner layer, intended to be in contact with a fluid, comprising a composition comprising at least one polymer and not comprising any copper, and a layer, referred to as the outer layer, intended to be in contact with the air, comprising a composition containing at least one polymer and at least one copper-based stabilizer. The invention also relates to a pipe comprising such a multilayer structure, and also to its use for transporting or storing fluids.
Claims17
A multilayer structure comprising at least two layers:
- an innermost layer, intended to be in contact with a fluid, said inner layer predominantly comprising at least one polyamide and at least one organic stabilizer, and not comprising any copper, and
- an outermost layer, intended to be in contact with air, said outer layer predominantly comprising at least one polyamide and at least one copper-based stabilizer, said copper-based stabilizer being copper halides, copper acetate, copper halides or copper acetate in admixture with at least one alkali metal halide, or mixtures thereof, or complexed coppers.
Dependencies are inferred from the claim text.