Gas storage tank for e.g. hydrogen, comprises liner comprising composition containing copolyamide having structure of random tree type, which is result of reaction between multifunctional and difunctional monomers; and impact modifier

摘要

A gas storage tank comprises liner comprising composition consisting of 65-90 wt.% copolyamide having a structure of the random tree type, which is the result of the reaction between multifunctional monomer, difunctional monomer or the corresponding lactams; impact modifier; optionally chain extender; and optionally 0-5 wt.% additives. A gas storage tank comprises liner comprising composition consisting of 65-90 wt.% copolyamide having a structure of the random tree type, which is the result of the reaction between multifunctional monomer of formula (A'R 1)-R-(R 2B') n (I), difunctional monomer of formula A 1-R 5-B 1 (II) or the corresponding lactams, optionally difunctional monomer of formula A 1-R 3-A 1 (III) when B' is an amine or equivalent function, or a monomer of formula B 1-R 4-B 1 (IV) when B' represents an acid or equivalent function; impact modifier; optionally chain extender; and optionally 0-5 wt.% additives. n : 2-10; R 1 and R 2covalent bond, aliphatic, arylaliphatic, aromatic or alkylaromatic hydrocarbon-based radical; R : linear or branched aliphatic radical, optionally substituted cycloaliphatic radical, optionally substituted aromatic radical (comprising aromatic nuclei and/or heteroketones); A' and B' : amine, amine salt function, acid, ester, acid halide or amide function; A 1acid, ester or acid chloride function; B 1amine or amine salt function; R 3-R 5alkyl, optionally substituted aromatic, alkylaryl, arylalkyl or cycloaliphatic hydrocarbon-based radicals which may comprise unsaturations. Provided that when A' is amine, amine salt function, then B' is acid, ester, acid halide or amide function, and vice versa. Independent claims are included for the following: (1) manufacturing the gas storage tank involving manufacturing the liner by blow-molding or extrusion blow-molding, and assembling the same to structural components; coating liner with a composite coating layer, the composite comprising carbon fibers and/or glass fibers; (2) random tree copolyamide obtained by reaction between 0.1-0.5 mol.% multifunctional monomer (I), 98-99.8 mol.% difunctional monomer (II), and 0.001-0.5 mol.% difunctional monomer (III) or (IV).