Hydrolysis-resistant polyurethane submerged sponge and preparation method thereof

Abstract

The invention provides hydrolysis-resistant polyurethane submerged sponge and a preparation method thereof. The hydrolysis-resistant polyurethane submerged sponge is prepared from a component A and a component B. The component A is prepared from high-EO hydrophilic polyether polyol, high-hydroxyl polyether polyol, flexible foam polyether polyol, an organosilicon surfactant, a hydrophilic auxiliary, a cross-linking agent, a dispersing auxiliary, water, a catalyst and a physical foaming agent; and the component B comprises isocyanate. The invention also provides a preparation method of the hydrolysis-resistant polyurethane submerged sponge. The preparation method comprises the following steps: uniformly stirring the component A, dispersing at the speed of 500-2000 rpm for 5-30 minutes, adding the component B, stirring at the speed of 3000-6000 rpm for about several seconds, and discharging. The hydrolysis-resistant polyurethane submerged sponge prepared by the preparation method is high in air permeability; vOC is lower than that of blasting sponge; the water permeability is good, and the sponge sinks to the bottom of water quickly; and the hydrolysis resistance is excellent.

Description

technical field [0001] The invention belongs to the field of polyurethane foam, and in particular relates to a hydrolysis-resistant polyurethane submerged sponge and a preparation method thereof. Background technique [0002] Polyurethane is a general term for polymer compounds containing repeated carbamate groups in the main chain. This polymer material can be used to manufacture rubber, rigid and flexible foam plastics, adhesives, coatings, paints and other products. Its excellent wear resistance, impact resistance, UV resistance and high and low temperature resistance are widely used in construction, automobile, light industry, textile, petrochemical, metallurgy, electronics, national defense, medical, machinery and many other fields. Among them, soft polyurethane foam (referred to as polyurethane sponge) is the most widely used polyurethane product. It has low density, good elastic recovery, sound absorption, and breathability. It can be used as furniture cushions, vehic...

AI Technical Summary

Problems solved by technology

Due to the selection of raw materials, the sponge of this blasting process has insufficient hydrophilicity, and it will accelerate hydrolysis under high humidity conditions, and quickly lose its original physical properties.

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