Mineral polyurethane spraying material and preparation method thereof

Abstract

The invention belongs to the field of chemical synthesis, particularly relates to a mineral polyurethane spraying material and a preparation method thereof and more particularly relates to a double-component (A and B) polyurethane material and a preparation method thereof. The material is mainly used for rapidly spraying and sealing underneath mine; and through the selection of polyol, auxiliaries and isocyanate, the spraying material has good adhesion on a rock coal body; and after adhesion is carried out, the material has good anti-shearing property and toughness and resists impact. According to the invention, the viscosity of the material is reduced so that the material can well permeate into a coal bed or a fine crack of a rock stratum, and simultaneously, the related raw materials are low in smell, do not contain volatile solvent and do not generate any toxic gases, thereby completely meeting the use and environment-friendly requirements of a coal mine reinforcement material.

Description

technical field

[0001] The invention belongs to the field of chemical synthesis, and in particular relates to a mine-used polyurethane spraying material and a preparation method thereof. Background technique

[0002] During the excavation process of the new coal mine roadway, the surface rocks are easily damaged by weathering, and accidents of falling rocks and people are prone to occur. Therefore, the surface of the roadway needs to be coated. By spraying and sealing the wall of the goaf, the air leakage and gas gushing out of the gob can be effectively prevented, and the occurrence of coal-oxygen compound heat release and coal seam fire can be prevented. In addition, spray the surface of masonry closed walls and coal wall joints to prevent carbon monoxide and gas leakage.

[0003] At present, the treatment methods for mine roadway walls mainly include spraying mortar, phenolic resin, urea-formaldehyde resin, etc. Spraying mortar is seriously polluted underground, requiri...