Epoxy modified polyurethane cryogenic adhesive

Abstract

The invention discloses an epoxy modified polyurethane ultra-low temperature resistant adhesive. The components and the mass percentage of the adhesive are: 30-50 percent of polyurethane modified prepolymer, 5-15 percent of epoxy resin, 10-20 percent of solvent, 1-15 percent of chain extender, and 30-50 percent of filler. First, uniformly blend all the liquid components, and then add solid components to uniformly blend, and pack after grinding on a grinding mill. The epoxy modified polyurethane ultra-low temperature resistant adhesive of the invention has the nature of ultra-low temperature resistance, the mechanical property of which can remain stabilized even being used for a long term at 200 DEG C below zero, and has the advantages of high bond strength and shear strength as well as good cohesiveness and corrosion resistance.

Description

technical field

[0001] The invention belongs to the field of adhesives, and relates to an ultra-low temperature resistant adhesive, in particular to an epoxy-modified polyurethane ultra-low temperature resistant adhesive. Background technique

[0002] With the sharp increase in the use of liquefied gases (such as: liquefied natural gas LNG, liquefied petroleum gas LPG, liquefied ethylene, liquid oxygen, liquid nitrogen, etc.), the bonding at ultra-low temperature between the cryogenic insulation materials matched with liquefied gases causes received high attention. Under the harsh conditions of minus 200°C, it is difficult for existing adhesives to meet the requirements of low temperature resistance mechanics and bonding performance, and it is difficult to overcome the problems of brittleness and cracking of adhesives at low temperatures. Contents of the invention

[0003] In order to solve the technical problems of the existing adhesives at ultra-low temperatures, the pu...

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