Polyamide composition and polar graphene
AssigneeArkema France
InventorsThomas PRENVEILLE, Claude-Olivier BOISSIERE, Marjorie MARCOURT, Bertrand VERBAUWHEDE
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Abstract
The invention relates to a composition comprising, relative to the total weight of the composition: at least 50% by weight of at least one polyamide with an inherent viscosity of greater than 1.2; from 0.05% to 20% by weight of a polar graphene with a mean thickness of between 0.5 and 75 nm; from 3% to 40% by weight of at least one impact modifier. The invention also relates to the use of this composition for the preparation of a single-layer or multilayer structure for storing, transporting, and distributing fluid, notably transport vehicle fluid.
Claims21
A composition comprising, relative to the total weight of the composition:
- at least 50% by weight of at least one polyamide with an inherent viscosity of greater than 1.2;
- from 0.05% to 20% by weight of a polar graphene with a mean thickness of between 0.5 and 75 nm;
- from 3% to 40% by weight of at least one impact modifier.
A method comprising using from 0.05% to 20% by weight of at least one polar graphene with an average thickness of between 0.5 and 75 nm in a composition comprising at least 50% by weight of at least one polyamide with an inherent viscosity of greater than 1.2, optionally up to 5% by weight of at least one additive, optionally up to 40% by weight of at least one impact modifier and/or less than 1% by weight of at least one plasticizer, the percentages being given relative to the total weight of the composition, to obtain an extractable matter content of less than or equal to 4 g/m2.
A method comprising using from 0.05% to 20% by weight of at least one polar graphene with an average thickness of between 0.5 and 75 nm in a composition comprising at least 50% by weight of at least one polyamide with an inherent viscosity of greater than 1.2, optionally up to 5% by weight of at least one additive, optionally up to 40% by weight of at least one impact modifier and/or less than 1% by weight of at least one plasticizer, the percentages being given relative to the total weight of the composition, to obtain an extractable matter content lower than that obtained for the same graphene-free composition in which graphene has been replaced with the same amount of polyamide.
A method comprising using from 0.05% to 20% by weight of at least one polar graphene with an average thickness of between 0.5 and 75 nm in a composition comprising at least 50% by weight of at least one polyamide with an inherent viscosity of greater than 1.2, optionally up to 5% by weight of at least one additive, optionally up to 40% by weight of at least one impact modifier and/or optionally less than 1% by weight of at least one plasticizer, the percentages being given relative to the total weight of the composition, to obtain a permeability lower than that obtained for the same graphene-free composition in which graphene has been replaced with the same amount of polyamide.
Dependencies are inferred from the claim text.