| abstract |
Provided are foam moldings that can improve the vibration damping and sound insulation properties of panels, and that can realize lightweight panels, sealing rubbers, composites of sealing rubbers and panels, and methods for increasing sound transmission loss. A foamed molded body of a resin composition containing a block copolymer (I) having a polymer block (A) mainly composed of a structural unit derived from an aromatic vinyl compound, and other The polymer block (B), in accordance with JIS K7244-10 (2005), has a thickness of 1 mm, a strain of 0.1%, a frequency of 1 Hz, a measurement temperature of −70°C to 70°C, and a heating rate of 3°C The peak temperature of tanδ measured under the conditions of /min is −50 to 50°C, and the peak molecular weight obtained in terms of standard polystyrene based on gel permeation chromatography is 30,000 to 500,000; - At least one olefin-based polymer (II) among a propylene-diene copolymer rubber, an ethylene-vinyl acetate copolymer, and a polyethylene-based resin; a crosslinking agent (III); and a foaming agent (IV). |