Low density high hardness polyurethane micropore elastomer and preparation thereof

Abstract

The invention discloses a low-density high-hardness microporous polyurethane elastomer and a preparation method thereof; polyester polyol A1, polyester polyol A2, polyester polyol A3, Diol chain extender, crosslinking agent, tertiary amine or organic metal catalysts, organosilicone foam homogenizing agent and water foaming agent are placed in a reactor and then mixed for obtaining a component A; isocyanate, polyester polyol B1, polyether polyol, and side effect inhibitor are placed in the reactor and then reacted for preparing a component B; later, the two components are completely mixed and injected into a mold for being reacted and molded so as to obtain the microporous polyurethane elastomer. The microporous polyurethane elastomer which is produced by the method has the advantages of low density, high hardness, low product shrinkage rate and the like, and can be widely used in production of sole materials such as middle sole, large sole, and the like.

Description

technical field [0001] The invention belongs to the field of polymer material manufacturing, and in particular relates to a low-density and high-hardness polyurethane microporous elastomer used for making shoe soles and a preparation method. Background technique [0002] Polyurethane is a new type of polymer material with excellent performance. It has the dual advantages of plastic and rubber. It is the fifth largest plastic after polyethylene, polyvinyl chloride, polypropylene and polystyrene. It is widely used in synthetic fibers and shoemaking. Industry, automobile industry, building materials and other fields, especially the shoe industry has become an important consumer industry of polyurethane products. Due to the advantages of light weight, non-slip, good elasticity, high strength, wear resistance and oil resistance, the sole material produced by polyurethane microcellular elastomer has achieved rapid development in the past ten years. China is a big shoe-making coun...

AI Technical Summary

Problems solved by technology

Although the density can be obtained by this method is 0.12g / cm 3 to 0.30g / cm 3 Polyurethane foam material, but it is mainly used in the middle sole in the sole, not suitable as the pouring material for the outsole of the sole

And a large amount of high-priced butanediol is used in the raw materials. Although the addition of butanediol can improve the mechanical properties of polyurethane soles, it also greatly increases the cost of the product.

Patent CN1590427A discloses a low-density and high-foaming polyurethane resin formulation for shoes. Using this resin formulation can effectively reduce the density of shoe soles, but the resulting product is prone to shrinkage and deformation, and the hardness cannot meet the use requirements of certain shoe soles. Physical foaming agent M705b is not conducive to environmental protection requirements

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