Experimental Research of Mine Polyurea Spraying Material
FAN Shulan
YANG Renkai
LIU Qing
XU Xiangbin
Abstract：In order to prevent the air and harmful gas leakage and the coal spontaneous combustion, a mine polyurea spraying material was developed, which takes the isocyanate prepolymer, terminal amino polyether, chain extender, flame retardant and so on as the main materials. Study was carried out on the influence of the parameters such as the isocyanate index, temperature, air pressure, flame retardant and antistatic agent upon the properties of the polyurea spraying material. The experimental results showed that the mine polyurea spraying material can turn into gel within 8 s, its elongation at break was 370%,its surface resistance was 4 × 107 Ω, and its flame retardant properties reached the requirements specified in Standard“The General Test Method and Decision Rule for Flame Retardant and Antistatic Properties of Polymer Products for Coal Mines”.
Keywords：polyureaspraying materialspontaneous combustion of coalflame retardantantistatc
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 19-22 )