The thermoplastic composition in gel expansu00ecvel, process to produce a composition in gel flexu00ecvel expanded, and use of a composition in gel flexu00ecvel expanded

摘要

The thermoplastic composition in gel expansu00ecvel, process to produce a composition in gel flexu00ecvel expanded, and use of a composition in gel flexible expanded.The invention relates to a composition for thermoplastic expandable gel comprising (a) a block copolymer comprising at least a block polymer derived from a compound of the monovila aromatic and at least one block of a conjugated diene polymer (B derivative; (b) a component Liquid, selected the group consisting of oils, solvents, plasticizers and dilators.They are compatible with the copolimero block mentioned above (a); (c) expandable thermoplastic particles by heat, gas or liquefied gas encapsulating expandable by heat; and (d) optionally a photo initiator.Characterized by the fact that the block copolymer (a) is a block copolymer which can be cross-linked by exposure to radiation and which has a content of compound of aromatic monovila 7 to 35% by weight, based on total polymer, an apparent molecular weight of total 50 to 1500 kg / mol and a The vinyl content in Block B of 10 to 80% by mol.In which the blocks B were optionally hydrogenated to a degree that at least 25% of the original etilu00eanica unsaturation is left. According to another aspect of the present invention, are provided with two processes to produce the composition gel flexible expanded.The invention also relates to the use of a composition in gel flexible expanded in automotive appliances, but also in applications such as cable filling, sealing reintroduzu00edvel electrical connections, vibration absorber, pressure relief, toys, cushion, Garr The therapeutic devices and orthopaedic and flexographic printing plates.