TRANSPARENT FLEXIBLE COMPOSITION

摘要

A transparent flexible composition which comprises 100 parts by mass of a thermoplastic elastomer component (A) containing a butyl rubber and a hydrogenated block polymer being obtained by the hydrogenation of an olefinic unsaturated bond in a block copolymer having, in its molecule, at least one butadiene polymer block (I) having a vinyl bonding content in the block of 5 to 25 % and at least one polymer block (II) having a mass proportion of a conjugated diene to another monomer of (100 to 50)/(0 to 50) and having a vinyl bonding content of 25 to mass 95 %, and 500 to 5000 parts by mass of a liquid material (B) having a dynamic viscosity of 500 mm<2>/s or less and being nonvolatile at -100 to 50°C, and which exhibits a total light ray transmittance at 25°C and at a thickness of 0.5 mm of 90 % or more. The above transparent flexible composition exhibits excellent transparency, and also is excellent in impact resistance and in viscoelasticity.