Chemical polyurethane foaming agent and preparation method thereof

The invention relates to a chemical polyurethane foaming agent and a preparation method thereof, and belongs to the technical field of synthesis of fine chemical products. The chemical polyurethane foaming agent is prepared by reacting semi carbazide, ethoxy azodiisobutyronitrile and a hydrazine hydrate. The foaming agent and the isocyanic acid radical are reacted to generate carbon dioxide, the foam structure of the polyurethane can be improved, and the excellent effect of the polyurethane chemical foaming agent is exerted. According to the foaming agent, the formed polyurethane foam structure is uniform, and the physical performances of the polyurethane foams are improved. The preparation process of the provided chemical foaming agent is simple and easy to operate, the comprehensive performance of the polyurethane foams is improved, and chemical foaming agent contributes to popularization.