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

A grouting material and self-limiting temperature technology, applied in the field of materials, can solve problems such as spontaneous combustion of coal seams, open fire accidents, hidden safety hazards, etc., and achieve the effect of promoting reactions and preventing hydrolysis

Active Publication Date: 2014-08-13
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 these two materials uniformly to obtain the A component of the grouting material;

[0041] (2) Weigh 26 grams of polyether polyol-220, add 0.4 grams of catalyst triethylene diamine and 0.2 grams of stannous octoate, 0.2 grams of sodium dodecylbenzene sulfonate as dispersant, and ammonium polyphosphate as flame retardant. 15 grams, 0.4 grams of defoamer silicone oil, mix these materials evenly to obtain the B component of the grouting material;

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

[0043] (4) Pour the prepared B and C components into the A component and mix them evenly to obtain a polyurethane grouting material with good permeability and low heat storage temperatu...

Embodiment 2

[0045] (1) Weigh 40 grams of isocyanate PAPI (PM-200) as the A component 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. 0.4g of defoamer silicone oil, mix these materials evenly to obtain the B component of the grouting material;

[0047] (3) Preparation of self-limiting temperature additive C component, the specific method is: first prepare a 15% sodium acetate aqueous solution totaling 8 grams, add 4 grams of potassium sulfate, stir it evenly to obtain the C of the grouting material Component

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

Embodiment 3

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

[0051] (2) Weigh 26 grams of polyether polyol-303, add 0.5 grams of catalyst triethylene diamine, 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 grams of silicone oil, mix these materials evenly to obtain the B component of the grouting material;

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

[0053] (4) Pour the prepared B and C components into the A component and mix them evenly to obtain a polyurethane grouting material with good permeability and low heat storage temperature.

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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 specifically relates to a self-limiting temperature polyurethane grouting material and a preparation method thereof. Background technique [0002] The chemical slurries currently used for mining mainly include urea-formaldehyde resin grouting materials, acrylamide grouting materials, epoxy resin grouting materials and polyurethane grouting materials. Among them, 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 subject to certain restrictions; acrylamide-based grouting materials are very toxic. In the relevant literature, there are reports of poisoning due to the grouting material in Japan, so the grouting material is in Japan It has been banned by the government; the epoxy resin grouting material has high viscosity and high cost, and its effect in dealing with rock mass micro-crack...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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