The invention relates to an air-permeable slow-rebound
polyurethane foam plastic, and a preparation method and an application thereof. The problem of low air permeability of a slow-rebound
polyurethane foam plastic in the prior art or the problems low air permeability and poor slow-
rebound effect of the slow-rebound
polyurethane foam plastic is / are mainly solved. The air-permeable slow-rebound polyurethane foam plastic comprises, by weight, 10-100 parts of a polyether
polyol A, 1-50 parts of a polyether
polyol B, 1-50 parts of a polyether
polyol C, 40-80 parts of
isocyanate, 1-5 parts of water, 0.2-0.8 part of an amine catalyst, 0.01-0.4 part of a
tin catalyst and 0.5-3 parts of a foam stabilizer, wherein the
hydroxyl value of the polyether polyol A is 60-230 mg KOH / g, the unsaturation degree is 0.01-0.2 mmol / g, the functionality is 2-4, and
ethylene oxide accounts for 50-80% of the molecular weight of the polyether polyol A; the
hydroxyl value of the polyether polyol B is 120-210 mg KOH / g, the unsaturation degree is 0.01-0.2 mmol / g, the functionality is 2-4, and the
ethylene oxide accounts for 85-100% of the molecular weight of the polyether polyol B; and the
hydroxyl value of thepolyether polyol C is 35-59 mg KOH, the unsaturation degree is 0.01-0.2 mmol / g, and the functionality is 2-4. The preparation method and the application of the product achieves good technical effects, and the preparation method can be used in industrial production of the air-permeable slow-rebound foam plastic.