Binder used between urethane foam and glass fiber reinforced plastic of LNG ships

Abstract

The invention discloses a binder used between urethane foam and glass fiber reinforced plastic of LNG ships, which comprises the following compositions by mass percentage: 30 to 50 percent of organosilicone polyurethane modified prepolymer, 5 to 15 percent of epoxide resin, 10 to 20 percent of solvent, 1 to 15 percent of chain extender, 1 to 10 percent of vermiculite, 10 to 18 percent of SiO2, 10 to 20 percent of CaCO3 and 2 to 10 percent of CaCl2. The liquid compositions are uniformly mixed firstly, and then added with the solid compositions for uniform stirring, and the mixture is ground on a grinding machine and then packaged. The binder used between the urethane foam and the glass fiber reinforced plastic of the LNG ships has large binding power between the urethane foam and the glass fiber reinforced plastic, and properties of ultralow temperature resistance and water resistance, and can be used at 200 DEG C below zero for a long time and keep the mechanical property to achieve the aim of fully protecting heat insulating materials.

Description

technical field [0001] The invention belongs to the field of adhesives, and relates to an ultra-low temperature and water-resistant adhesive, in particular to an epoxy-modified silicone polyurethane ultra-low temperature and water-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 has caused High attention. [0003] During the construction of the LNG ship, at ultra-low temperature (163.5 degrees), the problem of bonding between FRP and polyurethane foam was involved. FRP plays the role of protecting the foam shell and bearing on the surface, and the thermal conductivity of FRP and polyurethane materials is very different. Due to thermal stress, the currently used adhesives cause peeling probl...

AI Technical Summary

Problems solved by technology

[0003] During the construction of the LNG ship, at ultra-low temperature (163.5 degrees), the problem of bonding between FRP and polyurethane foam was involved. FRP plays the role of protecting the foam shell and bearing on the surface, and the thermal conductivity of FRP and polyurethane materials is very different. Due to thermal stress, the currently used adhesives cause peeling problems between the FRP and the polyurethane foam material, so that the FRP cannot achieve the desired protective effect on the polyurethane foam.

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