2-part reactive urethane resin composition and method for producing thereof

An open-cell soft polyurethane foam prepared from a 2-part reactive urethane resin composition prepared from a polyisocyanate component (X) and a polyol-containing component (Y),

• wherein the polyol-containing component (Y) comprises a polyol component (a), catalysts (b), a foam stabilizer (c), an amine compound having primary or secondary amino groups (d), and carbon dioxide (e);
• wherein an average sound absorption coefficient of said open-cell soft polyurethane foam is 30% or more, measured in accordance with JIS A 1405-2:2007 for 63 hertz to 5000 hertz;
• and wherein
• a length of liquid-dripping is within 300 mm measured in accordance with the following measuring method:
• an acrylic plate is placed vertically at a position 10 cm away from the discharge position of an injection molding machine, and a mixture of the polyisocyanate component (X) and the polyol-containing component (Y) is discharged from the injection molding machine to the acrylic plate for 0.2 seconds at a rate of 120 g/sec to form an injected product on the acrylic plate;
• then, 5 minutes after discharge, the length from the highest point to the lowest point in the vertical direction of the injected product on the acrylic board is measured as the liquid-dripping length.