Polyester type polyurethane microporous sole material and preparation method thereof

Abstract

The invention discloses a polyester type polyurethane microporous sole material and a preparation method thereof. The preparation of Component A comprises the following steps: mixing 60-80 weight parts of polyester polyol, 30-10 weight parts of polymer polyol, 7-10 weight parts of chain extender, 0.6-1.2 weight part(s)of catalyst and 0.5-1.0 weight part of foam stabilizer for 1 hour at the temperature of 75 DEG C plus or minus 3 DEG C, reducing the temperature to 42 DEG C plus or minus 3 DEG C, adding 0.4-0.5 weight part of water, and mixing for 1 hour; the preparation of Component B comprises the following steps: mixing 80-100 weight parts of MDI, 0-20 weight part(s) of liquefied MDI and 35-95 weight parts of polyester polyol for 2 hours at the temperature of 80 DEG C under the nitrogen protection; and the preparation of a polyurethane microporous elastomer comprises the following steps: maintaining the temperature of Component A at 50 DEG C plus or minus 2 DEG C, maintaining the temperature of Component B at 45 DEG C plus or minus 2 DEG C, adjusting the dosage of Component A and Component B so that the molar ratio of hydroxyl and NCO is 1:1, mixing the two components, injecting the mixed components into a mold for reaction and formation, stripping the mold, and curing, thereby obtaining the product.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyester polyurethane microporous shoe sole material and a preparation method thereof. Background technique [0002] An important application of polyurethane microporous materials is for shoe sole materials. Polyurethane sole material has the advantages of good elasticity, high strength, and wear resistance, and is accepted by people. Polyurethane sole materials are divided into polyester type and polyether type. Due to the excellent mechanical properties of polyester type sole materials, they account for more than 80% of the domestic market for polyurethane sole materials. Compared with traditional shoe sole materials, the high cost of polyurethane materials limits its wide application. Especially in recent years, the price of polyurethane raw materials both at home and abroad has risen significantly, which increases the cost of polyurethane sole materials and af...

AI Technical Summary

Problems solved by technology

CN1961016A can obtain lower-density shoe sole materials, but high-priced butanediol is used in its raw materials, although the density has been reduced, but the cost has not been reduced

The low-density polyurethane material prepared by CN1590427A has adopted foaming agents that are not conducive to environmental protection, and cannot be used in large quantities in practice

Low-density microporous polyurethane shoe sole material has also been prepared in CN101486788A, but its key raw material polymer polyester polyol still has higher cost and limited sources, and cannot be used in large quantities in actual production, and also does not provide low-density in CN101486788A. Density information on the load-carrying properties of sole materials

In CN1850906, the cost is reduced by adding aluminum silicate powder materials to the polyurethane shoe sole material. The addition of this type of inorganic material has technical problems such as uneven dispersion and high viscosity, and it is impossible to prepare ideal low-cost materials.

In CN1849352, a special method is adopted to add inorganic fillers in the polyester polymerization process. Although the dispersibility of the inorganic fillers can be changed, the high viscosity is still an obvious disadvantage, and the process of adding fillers is relatively complicated, so it cannot be widely used in practical applications.