Polyurethane sponge and preparation method thereof

Abstract

The invention discloses polyurethane sponge and a preparation method thereof, and belongs to the technical field of foam sponges. The polyurethane sponge comprises microcrystalline cellulose, soybeanoil, diethylene glycol, potassium hydroxide, polyether polyol, a foaming agent, a foam stabilizer, toluene diisocyanate, distilled water, silver-loaded zirconium phosphate, an aluminate coupling agent, cerium oxide, a silicone-acrylic emulsion, an EVA emulsion, polylactic acid fibers, oleic acid and fumed silica. The preparation method of the polyurethane sponge comprises mixing, catalyst preparation, crosslinking, foaming, etc. The rebound rate and tear strength of the polyurethane sponge are improved by polylactic acid fibers, fumed silica and oleic acid as reinforcing systems.

Description

technical field [0001] The invention relates to the technical field of foamed sponges, in particular to a polyurethane sponge and a preparation method thereof. Background technique [0002] Due to its excellent comfort performance, polyurethane slow rebound foam has been widely used in household products, automobiles, shoe materials, medical equipment and other fields. Due to its unique molecular structure, polyurethane rebound foam has high comfort performance. Under a certain pressure, the polyurethane rebound foam will change its shape with the pressure, so that the pressure will be evenly distributed, and the local stress points will be reduced. After the pressure is released, its shape will slowly return to its original shape. However, due to its own closed-cell structure, the air permeability and damping and sound absorption properties of polyurethane slow rebound foam are poor. In the article "Synthesis of Soybean Oil Polyol and Performance of Polyurethane Slow Resil...

AI Technical Summary

Problems solved by technology

The soybean oil polyol-based polyurethane slow-rebound foam was prepared by using the synthesized soybean oil polyol. It is found that the use of soybean oil polyol will improve the air permeability, damping performance and sound absorption performance of polyurethane slow rebound foam, but it will lead to the decline of mechanical properties. It is proposed to increase the amount of foaming agent water or increase the isocyanate index. Soybean oil polyol-based polyurethane slow-rebound foam has high air permeability, damping performance and sound absorption performance, and its mechanical properties are improved

Although the soybean oil polyol-based polyurethane rebound foam was synthesized by modifying soybean oil, the air permeability, damping performance and sound absorption performance of the slow rebound sponge were improved, but its disadvantages of poor mechanical strength and poor toughness reduced the quality of the material. The service life and people's comfort affect the quality of the product and cannot promote economic development, and the slow rebound sponge prepared by it can not fully meet the various needs of people for sponge pads today, so further improvement is needed to improve Its mechanical properties, thermal stability, hydrophobicity and other properties expand the application field and prolong the service life