Foamed polyurethane and sound-absorbing and noise-reducing material

The invention relates to the technical field of polyurethane foaming, and concretely relates to a foamed polyurethane and a sound-absorbing and noise-reducing material. The foamed polyurethane comprises, by mass, a component A and a component B, wherein the component A comprises 5-15% of ethylene oxide chain-extended polyether polyol, 15-30% of propylene oxide chain-extended polyether polyol, 40-70% of phthalic anhydride polyester polyol and 8.75-16.6% of an auxiliary agent; the functionality of the ethylene oxide chain-extended polyether polyol is 3-7, and the mass percentage content of ethylene oxide is 20-50%; and the component B is polyisocyanate, and the mass ratio of the component A to the component B is 1: (1.1-1.2). The foamed polyurethane has a high aperture ratio. The invention also provides the sound-absorbing and noise-reducing material comprising the foamed polyurethane. 本发明涉及聚氨酯发泡技术领域，具体而言，涉及一种发泡聚氨酯及吸音降噪材料。发泡聚氨酯，其包括以下质量百分质量百分含量的各组分：A组分：环氧乙烷扩链的聚醚多元醇5％～15％、环氧丙烷扩链的聚醚多元醇15％～30％、苯酐聚酯多元醇40％～70％及助剂8.75