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Self-temperature-limited polyurethane grouting material and preparation method thereof

A grouting material and self-limiting temperature technology, which is applied in the field of materials, can solve the problems of coal seam spontaneous combustion, open fire accidents, spontaneous combustion, core burning and smoke generation, and achieve the effect of promoting reaction and preventing hydrolysis

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

[0003] However, during the curing process of polyurethane grouting materials, the heat of reaction is large and the heat storage temperature is high, which is prone to spontaneous combustion, core burning and smoke generation, especially in the special environment of coal mine underground, which is easy to cause coal mine accidents, such as Zhaolou of Yanzhou Coal Industry Group In the coal mine, due to the excessive heat release of chemical grouting materials, it almost caused an open fire accident; in Huaibei Mining Group, Guobei Coal Mine caused a coal seam spontaneous combustion accident due to improper handling of chemical materials; Accidents prone to spontaneous combustion and ignition; a fire accident occurred in a mine of Jincheng Coal Industry Group due to poor flame retardancy of materials
There are potential safety hazards in existing polyurethane grouting materials, and it is urgent to develop a grouting reinforcement material with low heat storage temperature

Method used

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  • Self-temperature-limited polyurethane grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Weigh 28 grams of toluene diisocyanate (TDI), add 12 grams of prepolymer, and mix the two materials evenly to obtain component A of the grouting material;

[0041] (2) Weigh 26 grams of polyether polyol-220, add 0.4 grams of catalyst triethylenediamine and 0.2 grams of stannous octoate, 0.2 grams of dispersant sodium dodecylbenzene sulfonate, flame retardant ammonium polyphosphate 15 grams, 0.4 grams of defoamer silicone oil, these several materials are mixed homogeneously, obtain the B component of grouting material;

[0042] (3) Prepare the C component of the self-limiting temperature additive, the specific method is: first prepare 8 grams of aqueous solution of sodium hydroxide with a mass fraction of 15%, add 4 grams of sodium chloride, stir and dissolve it to obtain the grouting material The C component;

[0043] (4) Pour the prepared components B and C into component A and stir well to obtain a polyurethane grouting material with good permeability and low hea...

Embodiment 2

[0045] (1) Weigh 40 grams of isocyanate PAPI (brand PM-200) as component A of the grouting material;

[0046] (2) Weigh 26 grams of polyether polyol-210, add 0.3 grams of catalyst hexamethylenetetramine, 0.3 grams of stannous octoate, 0.3 grams of KH570 dispersant, and 15 grams of flame retardant melamine cyanurate, 0.4 grams of defoaming agent silicone oil, these several kinds of materials are mixed uniformly, obtain the B component of grouting material;

[0047] (3) Prepare the C component of the self-limiting temperature additive. The specific method is: first prepare 8 grams of an aqueous solution of sodium acetate with a mass fraction of 15%, add 4 grams of potassium sulfate, and stir it evenly to obtain the C component of the grouting material. components;

[0048] (4) Pour the prepared components B and C into component A and stir well to obtain a polyurethane grouting material with good permeability and low heat storage temperature.

Embodiment 3

[0050] (1) Weigh 32 grams of isocyanate PAPI (brand PM-130), add 8 grams of polyurethane prepolymer, mix the two materials evenly, and obtain component A of the grouting material;

[0051] (2) Weigh 26 grams of polyether polyol-303, add 0.5 grams of catalyst triethylenediamine, 0.4 grams of polyvinyl alcohol dispersant, 12 grams of melamine phosphate flame retardant, and 1.3 grams of ethylene glycol chain extender , 0.3 gram of silicone oil, these several kinds of materials are mixed homogeneously, obtain the B component of grouting material;

[0052] (3) Prepare the C component of the self-limiting temperature additive. The specific method is: first make a total of 2 grams of an aqueous solution of potassium oxalate with a mass fraction of 20%, add 10.8 grams of n-heptane, and stir it evenly to obtain the grouting material. C component;

[0053] (4) Pour the prepared components B and C into component A and stir well to obtain a polyurethane grouting material with good permea...

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Abstract

The invention belongs to the technical field of materials and particularly relates to a self-temperature-limited polyurethane grouting material and a preparation method. The self-temperature-limited polyurethane grouting material is composed of three components, the component A includes isocyanate and prepolymer thereof and accounts for 30-50% of total mass of the grouting material, the component B includes polyether polyol and auxiliaries and accounts for 5-50%, preferably 30-50% of the total mass of the grouting material, and the component C includes self-temperature-limited additive with the boiling point adjustable within 66-130 DEG C and accounts for 5-55% of the total weight of the grouting material. By adding the self-temperature-limited additive into the isocyanate and the polyether polyol, heat storage temperature after the grouting material is solidified is lower than the boiling point of the self-temperature-limited additive, and accordingly, potential hazards of fire breaking due to overhigh storage heat of the grouting material are reduced, and fire disasters during grouting to underground engineering, especially coal mines are avoided.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a self-limiting temperature polyurethane grouting material and a preparation method thereof. Background technique [0002] Currently used mining chemical grout mainly includes urea-formaldehyde resin grouting materials, acrylamide grouting materials, epoxy resin grouting materials and polyurethane grouting materials, among which urea-formaldehyde resin grouting materials are generally very brittle and have poor toughness. And it is easy to volatilize free formaldehyde, so its application is limited to a certain extent; acrylamide grouting materials are very toxic, and there are reports in Japan that people were poisoned by this grouting material in related literature, so this grouting material is in Japan. It has been banned by the government; the epoxy resin grouting material has high viscosity and high cost, and it is not effective in dealing with micro-cracks in ...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/66C08G18/48C08K3/22C08K5/098C08K3/26C08K3/34
Inventor 杨绍斌梁正洪晓东董伟周晓谦吴晓光
Owner LIAONING TECHNICAL UNIVERSITY
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