Method for recycling leftover materials of rubber sponge body

The invention relates to the technical field of recycling of leftover materials of rubber sponges, and discloses a method for recycling the leftover materials of a rubber sponge body. The purpose of recycling waste sponge rubber can be achieved, environmental pollution can be reduced, the production cost of new products can be lowered, and the method has good social benefits and economic benefits.According to the method, a dissolution reaction mode is adopted for the waste rubber sponge, a decomposition product is distilled under the conditions of heating and pressure reduction firstly, a high-purity diamine compound can be obtained and can be directly used as a raw material for phosgenation reaction to be used for isocyanate production, distillation residues can be extracted by adoptingan organic solvent, then after washing, decolorizing, filtering and other process procedures, the obtained polyether polyol can be directly used for preparing polyurethane foam. According to the method, the purity and yield of