| 摘要 |
<p>Airtight elastomeric laminate for tyres, said laminate comprising at least two superposed elastomer layers:⋅a first layer, consisting of a composition based on at least: one thermoplastic elastomer block copolymer comprising at least one polyisobutylene central block and adjacent blocks consisting of at least one polymerized monomer, other than a styrene monomer, the content of said thermoplastic elastomer block copolymer being within a range extending from more than 50 to 100 phr (parts by weight per 100 parts by weight of elastomer), and it being understood that the glass transition temperature of said non-styrene polymer constituting the thermoplastic block of the thermoplastic elastomer block copolymer is greater than or equal to 60°C, and, in the case of a semicrystalline thermoplastic block, a melting temperature of greater than 60°C, and a plasticizing system comprising from 1 to 40 phr of a plasticizing oil and from 1 to 40 phr of a hydrocarbon resin, the total content of plasticizer being within a range extending from 2 to 70 phr;⋅a second layer, consisting of a composition based on at least one diene elastomer, the content of diene elastomer being within a range extending from more than 50 to 95 phr, and at least one thermoplastic elastomer (TPE), the content of thermoplastic elastomer being within a range extending from 5 to less than 50 phr, it being understood that at least 5 phr of the thermoplastic elastomers present in the second layer are compatible with at least 5 phr of the thermoplastic elastomer block copolymers present in the first layer.</p> |
