Manufacturing technique of using soybean oil-based polyhydric alcohols to prepare polyurethane shoe material

Abstract

The invention discloses a manufacturing technique of using soybean oil-based polyhydric alcohols to prepare a polyurethane shoe material. The raw materials adopted by the manufacturing technique comprise a component A and a component B, and a dosage ratio of the component A and the component B is (0.8-1.2). A preparing process comprises the steps of 1, using a vessel to weigh the component A according to a ratio, and afterwards, uniformly mixing the component A; 2, mixing the component A and the component B at the stirring speed of 1000-3000 r / min for 7-10 seconds, and maintaining the temperatures of the component A and the component B at 20-28 DEG C; 3, pouring the component A and the component B into a shoe material die with good sealing after mixing the component A and the component B, maintaining the temperature of the die at 40-60 DEG C, and conducting curing for 3-30 minutes; 4, opening the die to obtain the polyurethane shoe material with slow springback; 5, still standing the polyurethane for 48 hours to accomplish the curing. According to the manufacturing technique of using the soybean oil-based polyhydric alcohols to prepare the polyurethane shoe material, soybean oil polygydric alcohols with a high degree of functionality and a proper hydroxyl valve are added in a formula to completely or partially replace petroleum ether polyhydric alcohols, and a proper chain extension cross-linking agent and isocyanate are also added to form a spatial network structure with higher crosslinking density, an inhibiting phase is separated, and so that a slow springback effect is achieved.

Description

technical field [0001] The invention relates to a polyurethane shoe material, in particular to a production process for preparing polyurethane shoe material by using soybean oil-based polyol. Background technique [0002] Polyurethane, abbreviated as PU, is a general term for macromolecular compounds containing repeated urethane groups in the main chain. It is polymerized from binary or polyhydroxy compounds and dibasic or polyisocyanates. According to different applications, polyurethane has abbreviations such as CPU, TPU, and MPU. Its raw materials can be divided into isocyanates, polyols and additives (catalysts, cross-linking chain extenders, foaming agents, fillers, colorants, etc.). [0003] Polyurethane elastomers have a wide variety of raw materials, various formulations, and a wide range of adjustments. By adjusting the polyurethane formula, excellent properties such as high strength, good toughness, wear resistance, and oil resistance can be obtained. It has both...

AI Technical Summary

Problems solved by technology

[0006] The slow rebound foaming material formula prepared by traditional petroleum polyether polyol has the disadvantages of narrow adjustable range, easy to produce closed cells, and shrinkage of the product. It is necessary to add a hole opening machine or a rolling process to break and open the cells.

[0007] In addition, the raw materials of polyether and polyester used in the production of polyurethane are obtained from the processing of petroleum downstream products. Today, when petroleum resources are increasingly scarce in the world, the traditional polyether polyols produced by petroleum processing products have limitations.

[0008] In the prior art, polyurethane mainly uses petroleum ether polyols to manufacture slow-rebound polyurethane shoe materials when preparing shoe midsoles. Degradation, and the slow-rebound foam material prepared by traditional petroleum polyether polyols has a narrow adjustable range, which is prone to closed cells and shrinkage of the product.