Anti-explosion impact-resistant polyurea coating for foamed aluminum and preparation method thereof

Abstract

The invention provides an anti-explosion impact-resistant polyurea coating capable of being well adhered to the surface of foamed aluminum and a preparation method of the anti-explosion impact-resistant polyurea coating, belonging to the crossing field of polymer synthesis and explosion impact dynamics. The coating is formed by spraying an isocyanate semi-prepolymer component A and a component B composed of amine-terminated polyether, an amine chain extender and an auxiliary agent through a high-temperature high-pressure collision atomization mixing process. The component A is prepared from 47-53 parts by mass of isocyanate, 45-50 parts by mass of polyether polyol and 3-5 parts by mass of an active diluent through the processes of heating, vacuum dehydration and the like; and the componentB is prepared by stirring and mixing 58-66 parts by mass of amine-terminated polyether, 30-38 parts by mass of a liquid amine chain extender and 3-5 parts by mass of an auxiliary agent and carrying out vacuum dehydration. The synthesized polyurea coating has the advantages of high strength, good toughness, good impact resistance and strong interface adhesion with a foamed aluminum material, can coat the surface of foamed aluminum to form a composite protective armor structure, and has wide application space in lightweight weapon preparation and military and civil dual-purpose engineering protection facilities.

Description

technical field [0001] The invention belongs to the field of preparation of functional coating materials, in particular to an anti-explosion and impact-resistant polyurea coating applied to foamed aluminum and a preparation method thereof. Background technique [0002] Due to natural disasters or wars, common structures in people's lives are often subjected to explosive impact loads, such as building structures, automobile structures, and aircraft structures. The acting time of these loads is very short, usually causing rapid changes in the structural response in a short period of milliseconds, microseconds, or even nanoseconds, thus causing huge damage to the structure. Sudden damage to structures will cause a large number of casualties and property losses. Improving the protection performance of structures under the impact of explosions has become a hot and difficult research topic in the field of disaster prevention and mitigation. In today's society, most protective str...

AI Technical Summary

Problems solved by technology

Because the polyurea molecular chain can be adjusted from the rubber state to the glass state, the existing polyurea coating materials have a large difference in hardness and softness, and are mainly waterproof, and the energy absorption effect is poor.

At the same time, due to the existence of foamed aluminum cells, the interface between the existing polyurea coating materials and foamed aluminum has weak bonding force and poor adhesion.

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