Phase change energy absorbing polyurethane elastomer explosion-proof tank outer protection cover preparation method

Abstract

The invention discloses a phase change energy absorbing polyurethane elastomer explosion-proof tank outer protection cover preparation method. According to the method, polymer polyol and an MDI type prepolymer are subjected to a reaction to form a polyurethane elastomer matrix with high strength and high toughness; by adopting a chemical foaming method, the density of the generated polyurethane elastomer is effectively reduced while the microporous elastomer structure with excellent energy absorption and shock absorption effects is formed; and the energy absorbing effect of the elastomer is further improved by adding a certain amount of solid phase change material micro-particles to the raw materials, wherein the solid phase change material micro-particles can generate solid-liquid phase change and liquid-gas phase change under the action of explosive shock wave energy, have high phase change potential heat, and contain a plurality of crystal waters. The preparation method comprises: mixing the required raw materials, uniformly pouring into a specially-made explosion-proof tank outer protection cover mold, and carrying out foaming curing molding demolding to obtain the lightweightpolyurethane elastomer explosion-proof tank outer protection cover having good energy absorption effect. According to the present invention, with the method, the safety of explosion-proof equipment can be effectively enhanced, and the weight of explosion-proof equipment can be significantly reduced.

Description

technical field [0001] The invention belongs to the field of explosion-proof materials, and in particular relates to the preparation of a phase-change energy-absorbing polyurethane elastomer explosion-proof tank outer protective cover. Background technique [0002] The explosion-proof principle of explosion-proof tanks used in traditional public places is to use thicker steel plates and some high-strength toughness polymer materials to make a multi-layer composite structure shell to prevent the fragments and energy from the explosion. It can reduce the power of explosion and prevent the hazards caused by explosion shock waves and fragments. Because most of them are high-density metal materials, the weight of the body is very large (traditional explosion-proof tanks that can prevent the explosion of 500gTNT equivalent explosives can weigh more than 300 kg), and as the explosion-proof equivalent increases, the size and thickness of traditional explosion-proof tanks will decrea...

AI Technical Summary

Problems solved by technology

Because most of them are high-density metal materials, the weight of the body is very large (traditional explosion-proof tanks that can prevent the explosion of 500gTNT equivalent explosives can weigh more than 300 kg), and as the explosion-proof equivalent increases, the size and thickness of traditional explosion-proof tanks will decrease. Further increase, the weight will also further increase, and it is basically impossible to achieve fast movement by manpower, requiring professionals to use professional mechanical traction devices to move

In addition, the use of traditional explosion-proof tanks also requires that the explosion-proof tanks containing explosives be transferred to an open area, and there must be a space of more than 6 meters above, and avoid damage to load-bearing beams, glass, chandeliers, etc. that may cause splashes to hurt people. items, the conditions of use are extremely harsh

The high weight and harsh use conditions of traditional explosion-proof tanks make their actual use very time-consuming, which greatly reduces their application value for public safety explosion-proof where time is life

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