OBJET PNEUMATIQUE POURVU D'UNE COUCHE ELASTOMERE ETANCHE AUX GAZ DE GONFLAGE A BASE D'UN COUPAGE D'ELASTOMERES THERMOPLASTIQUES SOUS FORME DE COPOLYMERES A BLOCS

摘要

The invention relates to a tyre object provided with an elastomer layer sealed against inflation gases, said elastomer layer comprising mostly a blend of the following two thermoplastic elastomers: a) a first thermoplastic elastomer in the form of a first block copolymer which includes a first elastomer block comprising at least units from isobutylene, connected by one of the ends thereof to a first thermoplastic block including at least one first block made up of units from at least one first polymerisable monomer and at least one second block made up of units from β-pinene; and b) a second thermoplastic elastomer in the form of a second block copolymer which includes a second elastomer block comprising at least units from isobutylene, connected by each of the two ends thereof to second thermoplastic blocks each including at least one first block made up of units from at least one second polymerisable monomer and at least one second block made up of units from β-pinene. The invention also relates to a method for sealing a tyre object against inflation gases.