Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCn H2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCnH2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCn H2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCnH2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCnH2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a process for the manufacture of a bladder (2) of thermoplastic polymer for leaktightness to the gases of a type IV composite tank (1) and to a type IV tank (1) capable of being obtained by this process. The process of the invention comprises a stage of polymerization of a precursor monomer of said thermoplastic polymer to give said thermoplastic polymer in a rotating mold heated to a working temperature greater than or equal to the melting point of said monomer and lower than the melting point of said polymer, so as to form said bladder (2) by polymerization of said monomer coupled to rotomolding and without melting of the thermoplastic polymer obtained.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCn H2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention relates to a process for the manufacture of a bladder (2) of thermoplastic polymer for leaktightness to the gases of a type IV composite tank (1) and to a type IV tank (1) capable of being obtained by this process. The process of the invention comprises a stage of polymerization of a precursor monomer of said thermoplastic polymer to give said thermoplastic polymer in a rotating mold heated to a working temperature greater than or equal to the melting point of said monomer and lower than the melting point of said polymer, so as to form said bladder (2) by polymerization of said monomer coupled to rotomolding and without melting of the thermoplastic polymer obtained.