Resin for polyurethane shoe with extremely-low density and high hardness and preparation method thereof

Abstract

The invention relates to resin for a polyurethane shoe with extremely-low density and high hardness and a preparation method thereof, belonging to the chemical field. The resin is prepared by foaming a component A and a component B at a certain condition through a polyurethane foaming machine and injecting the mixture into a shoe mold. The component A is formed by mixing polyalcohol A1, polymer of polyester polyol A2, a cross-linking agent, a polyesterdiol chain extender, a catalyst, an organic silicon foam stabilizer, a water foaming agent and the like; and the component B is a prepolymer prepared by reacting polyisocyanates, polyester polyol B1 and polyether polyol B2. The invention has the advantages of maintaining higher hardness of products at lower density and greatly reducing the productions cost of production manufacturers of the polyster type polyurethane shoe. In addition, the invention has easily-obtained raw material, favorable repeatability of products and capability of realizing batch production.

Description

technical field The invention relates to an ultra-low-density and high-hardness polyurethane shoe resin and a preparation method thereof, belonging to the field of chemistry. Background technique Polyurethane soles are more and more popular with consumers because of their characteristics of lightness, wear resistance, good elasticity, continuous bottom, non-slip, oil-proof, and comfortable wearing. my country has the largest shoemaking industry in the world. In 2003, it produced 7 billion pairs of shoes, accounting for 50% of the world's output. In 2006, my country's shoe industry exported 7.8 billion pairs. It is estimated that 9 billion pairs of shoes will be produced in 2010. At present, the materials used for shoes mainly include leather, rubber, polyvinyl chloride (PVC), ethylene vinyl acetate (EVA), styrene butadiene styrene (SBS) and thermoplastic polyurethane elastomer (TPU). In recent years, my country's polyurethane raw liquid market has slowed down due to the imp...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the deficiencies in the prior art, provide an ultra-low density and high hardness polyurethane shoe resin and its preparation method, and solve the technical problem that the polyurethane sole can still maintain a high hardness under the condition of low density