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

A grouting material and additive technology, applied in building insulation materials, building components, buildings, etc., can solve problems such as excessive heat release, and achieve the effect of reducing core temperature, ensuring safety, and excellent sealing and reinforcement performance.

Active Publication Date: 2012-08-22
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of excessive heat release in the curing reaction process of existing polyurethane reinforced grouting materials, the present invention provides a polyurethane reinforced grouting material containing phase change additives and a preparation method thereof, the purpose of which is to add phase change Additives, phase change additives can change in shape with temperature changes and can absorb latent heat, thereby reducing the internal heat storage temperature of polyurethane grouting materials, reducing the heat storage temperature of polyurethane grouting materials, and reducing safety hazards in coal mines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh polyether polyol, dimethyl methyl phosphate, phase change additive, tin compound, amine compound, reactive solvent 1,4-butanediol and silicone defoamer according to the weight of polyether polyol As a benchmark, dimethyl methyl phosphate is 70%, phase change additive is 80%, tin compound is 2.4%, amine compound is 2.4%, silicone defoamer is 1.0%, 1,4-butanediol 20%, using ultrasound to mix the above raw materials evenly and let it stand for 10 minutes to obtain component A, weigh the isocyanate, control the isocyanate index to 1.05, as component B, add component B to component A, and mix evenly and react at room temperature to finally obtain a polyurethane reinforced grouting material containing phase change additives;

[0022] Wherein the phase change additive described on the basis of polyether polyol weight is: potassium aluminum sulfate dodecahydrate 16.5%, calcium chloride hexahydrate 16.5%, sodium phosphate dodecahydrate 16.8%, calcium sulfate dihydrate 14.8...

Embodiment 2

[0027] Weigh polyether polyol, dimethyl methyl phosphate, phase change additives, tin compounds, amine compounds, reactive solvents and silicone defoamers in proportion, based on polyether polyol, methyl phosphate two Methyl ester is 85%, phase change additive is 50%, tin compound is 2.5%, amine compound is 2.5%, silicone defoamer is 0.5%, 1,4-butanediol is 15%. Mix the above raw materials uniformly and let stand for 15 minutes to obtain component A, weigh the isocyanate, control the isocyanate index to 1.05, as component B, add component B to component A, mix uniformly and react at room temperature, and finally A polyurethane reinforced grouting material containing phase change additives is prepared;

[0028] Wherein with polyether polyol weight as benchmark, described phase change additive is: polyethylene 10.7%, butyl stearate 9.3%, paraffin wax 8.0%, polyisobutylene 11.7%, superfine asphalt 10.3%;

[0029] The catalyst is an amine compound and a tin compound, wherein the ...

Embodiment 3

[0033] Weigh polyether polyol, dimethyl methyl phosphate, phase change additives, tin compounds, amine compounds, reactive solvents and silicone defoamers in proportion, based on polyether polyol, methyl phosphate two Methyl ester is 60%, phase change additive is 12%, tin compound is 2.0%, amine compound is 2.0%, silicone defoamer is 1.5%, 1,4-butanediol is 10%. Mix the above raw materials uniformly and let stand for 20 minutes to obtain component A, weigh the isocyanate, control the isocyanate index to 1.15, as component B, add component B to component A, mix uniformly and react at room temperature, and finally A polyurethane reinforced grouting material containing phase change additives is prepared;

[0034] Wherein based on polyether polyol weight, described phase change additive is: potassium aluminum sulfate dodecahydrate 6.5%, polyethylene 5.5%;

[0035] The catalyst is an amine compound and a tin compound, wherein the tin compound is a mixture of 1.0% stannous octoate ...

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PUM

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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,...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L23/06C08L91/06C08L23/20C08L95/00C08K13/02C08K3/30C08K3/16C08K3/32C08K3/34C08K5/101
Inventor 杨绍斌周晓谦夏春晴董伟洪晓东徐晓辰
Owner LIAONING TECHNICAL UNIVERSITY
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