Polyurethane reinforced grouting material containing phase change additive and preparation method thereof

Abstract

The invention belonging to the technical field of materials, and particularly relates to a polyurethane reinforced grouting material containing a phase change additive and a preparation method of the polyurethane reinforced grouting material. The polyurethane reinforced grouting material containing the phase change additive comprises the following components in percentage by weight: 50-7% of polyurethane, 15-30% of dimethyl methylphosphate, 3-30% of phase change additive, 0.3-1.2% of tin compound, 0.3-1.2% of amine compound, and 0-0.8% of organosilicon defoaming agent. The phase change additive is an inorganic phase-change material, an organic phase-change material or a mixture thereof, and is uniformly distributed in polyurethane base in a dispersion manner; and when polymerization reaction radiates heat, the phase-change material can change from solid state into liquid or vitreous state into rubber state, rubber-like state and the like, absorbs part of heat radiated by the reaction of isocyanate and polyether polyol, and effectively reduces the inside heat accumulation temperature of the polyurethane grouting material.

Description

technical field

[0001] The invention belongs to the technical field of materials, in particular to a polyurethane reinforced grouting material containing phase change additives and a preparation method thereof. Background technique

[0002] With the increase of coal mining intensity and depth, the underground geological conditions of coal mines are becoming increasingly complex, and the number of broken surrounding rocks is increasing. Traditional support methods and support materials are difficult to meet the needs of coal production. For this reason, my country began to study the chemical grouting technology in coal mines in the early 1990s, and has made great progress. Among them, chemical grouting reinforcement materials represented by polyurethane grouting materials have been widely used and developed.

[0003] Polyurethane grouting material is a chemical slurry composed of isocyanate, polyether polyol and additives, such as phase change additives, catalysts, retarders,...