High-flame-retardancy foam material for coal wagon blocking

Abstract

The invention relates to the technical field of sealing materials and in particular discloses a high-flame-retardancy foam material for coal wagon blocking. The high-flame-retardancy foam material specifically consists of three components of a component A, a component B and a component C, wherein the component A comprises combined polyhydric alcohols; the component B comprises a prepolymer of isocyanate and polyether polyol; the component C is glacial acetic acid; and the combined polyhydric alcohols consist of polyhydric alcohols, micro-pore calcium silicate and magnesium trisilicate in a mass percentage ratio of (10-15):(1-2):(1-2). With the combination of the three components, the flame retardancy and the bonding strength of the foam material are effectively improved, and the foam material can be sufficiently applicable to a blocking environment of a coal wagon; the three-component polyurethane foam material disclosed by the invention is a blocking material which has an expansion time, is good in sealing property, good in bonding force and good in flame retardancy, is good in operability, simple, rapid and convenient to use and low in cost, and is capable of improving the security and the economy efficiency in blocking the coal wagon to a large extent.

Description

technical field [0001] The invention relates to the technical field of sealing materials, in particular to a highly flame-retardant foaming material used for sealing coal wagons. Background technique [0002] Polyurethane foaming agent is a high-performance foam material. Its thermal insulation performance is the best among various foam materials, and it has excellent material strength. best choice. With the emphasis on building energy conservation in my country, the amount of polyurethane foam insulation materials in my country's construction industry is expanding year by year. Polyurethane foaming agent, commonly known as foaming agent, styrofoam, and PU caulking agent, is the product of the cross combination of aerosol technology and polyurethane foam technology. When the material is sprayed from the aerosol can, the foamy polyurethane material will expand rapidly and react with the air or the moisture in the contacted substrate to form a foam. The cured polyurethane f...

AI Technical Summary

Problems solved by technology

However, in the process of transportation, there is a problem of coal powder flying and polluting the environment. At present, the coal bunkers of coal trucks are generally old, and the coal unloading bunkers are not dense, and the sealing is poor, resulting in a large number of coal lumps and coal surfaces scattered during the transportation process. In the train track, it pollutes the environment and wastes resources

[0004] At present, coal mines generally use household decorative foam glue or polyurethane foam insulation materials for wagon sealing and plugging. The disadvantages of household decorative foam glue are obvious, mainly in that it is time-consuming and labor-intensive. A section of wagon wagon with an ordinary length needs to be sprayed by a single person to use foam. It takes about 5 minutes to 10 minutes for the glue to seal, resulting in low work efficiency, long construction period, affecting coal shipments, high cost, and the risk of explosion in the pressure tank. There have been incidents of explosions and injuries in summer

The biggest problem with polyurethane foam insulation materials is that the flame retardancy is not high enough, especially for the contact with combustion-supporting coal powder, there is a great potential safety hazard, and there is a large amount of powdery materials in the gaps of coal wagon wagons, which is very harmful to plugging The strength requirements of the material are higher. At present, when the existing foam material encounters a large amount of powdery material, it is easy to fall off, causing the phenomenon of scattering again in the middle of coal transportation.