Low-heat-value high-strength polyurethane material for coal mine grouting and preparation method thereof

A polyurethane material with low calorific value, applied in the field of coal mine safety materials, can solve the problems of reducing the mechanical properties of materials, not suitable for large-scale promotion and use, and complicated preparation process, so as to eliminate safety hazards, low raw material prices, and broad application prospects Effect

Active Publication Date: 2019-01-11
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can reduce the heat of reaction starting from the raw material itself, it will affect the polyurethane material to a certain extent, red

Method used

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  • Low-heat-value high-strength polyurethane material for coal mine grouting and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A kind of low calorific value high-strength polyurethane material for coal mine grouting, such as figure 1 Shown, prepared by the following steps:

[0037] (1) Preparation of component A: Grind 5 parts of slag micropowder several times to nanometer level, then dry at 120°C for more than two hours; pump out 30 parts of polyether polyol in container I1 (Functionality is 4, relative molecular weight 1000) to mixing kettle I4, add 5 parts of silicone oil, 5 parts of stannous octoate, 5 parts of trichloroethyl phosphate, 5 parts of ammonium aluminum sulfate dodecahydrate, 10 parts of chopped polypropylene fibers (length 3mm, diameter 8 μm), 5 parts of dried nano slag micropowder are simultaneously added in the mixing tank I4, after fully stirring, it is made into component A;

[0038] (2) Preparation of component B: pump 20 parts of polyether polyol in container II2 to mixing kettle II5, and add 5 parts of octahydrate barium hydroxide to mixing kettle II5 to form component ...

Embodiment 2

[0044] A kind of low calorific value high-strength polyurethane material for coal mine grouting, such as figure 1 Shown, prepared by the following steps:

[0045] (1) Preparation of component A: Grind 15 parts of stone powder several times to the nanometer level, then dry at 120°C for more than two hours, and pump out 60 parts of polyether polyol in container I1 ( Functionality is 4, relative molecular weight is 1000) to mixing kettle I4, and 10 parts of silicone oil, 10 parts of stannous octoate, 10 parts of trichloroethyl phosphate, 10 parts of ammonium aluminum sulfate dodecahydrate, 15 parts 1 part of chopped polypropylene fiber (length 3mm, diameter 10 μm), 15 parts of dried nano stone powder were added to mixing kettle I4 at the same time, after fully stirring, it was made into component A;

[0046] (2) Preparation of component B: pump 40 parts of polyether polyol in container II2 to mixing kettle II5, and add 10 parts of octahydrate barium hydroxide to mixing kettle II...

Embodiment 3

[0052] A kind of low calorific value high-strength polyurethane material for coal mine grouting, such as figure 1 Shown, prepared by the following steps:

[0053] (1) Preparation of component A: Grind 10 parts of fly ash several times until it reaches the nanometer level, then dry it at 120°C for more than two hours for later use, and pump out 35 parts of polyether in container I1 Add polyol (functionality: 4, relative molecular weight: 1000) to mixing tank I4, and add 5 parts of silicone oil, 5 parts of stannous octoate, 5 parts of trichloroethyl phosphate, and 5 parts of aluminum sulfate dodecahydrate into mixing tank I4 Ammonium, 10 parts of chopped polypropylene fibers (length 3mm, diameter 9 μm), 10 parts of dried nano-fly ash were added to mixing kettle I4 at the same time, after fully stirring, it was made into component A;

[0054] (2) Preparation of component B: pump 25 parts of polyether polyol in container II2 to mixing kettle II5, and add 5 parts of octahydrate ba...

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Abstract

The invention provides a low-heat-value high-strength polyurethane material for coal mine grouting and relates to the technical field of coal mine safety materials. The low-heat-value high-strength polyurethane material comprises three components, namely, a component A, a component B and a component C, wherein the component A is mainly formed by polyether glycol, inorganic filling aggregate, foamstabilizer, tin catalyst, fire retardant, phase change additive a and polypropylene fiber; the component B is mainly formed by polyether glycol and phase change additive b; the component C is made ofpolymerized MDI. According to the invention, the phase change material with lower melting point is adopted for achieving a three-step cooling effect through chemical reaction, crystallizing water lossand phase change, so that ultrahigh temperature of the material in the use process is prevented and the potential safety hazard in the borehole operation process of coal mine is eliminated; the problems of low strength, easiness in cracking and the like of the material can be solved; the low-heat-value high-strength polyurethane material is environment-friendly and pollution-free and is high in curing rate; the preparation method is simple.

Description

technical field [0001] The invention relates to the technical field of coal mine safety materials, in particular to a low calorific value high-strength polyurethane material for coal mine grouting and a preparation method thereof. Background technique [0002] At present, in the underground mining and production process of coal mines, the roof fall and slabs caused by the broken coal rock mass are easy to cause injury accidents, which has always been an unavoidable technical problem in coal mines. At the same time, coal spontaneous combustion disasters occur from time to time due to mine air leakage. The broken coal rock mass and air leakage channel in the mine are filled and reinforced. At present, polymer materials are mainly used in mine reinforcement and filling, but due to the accumulation of reaction heat during use, the internal temperature is too high, resulting in internal core burning and external cracking, and may cause spontaneous combustion of coal due to high t...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/76C08L23/12
CPCC08G18/4804C08G18/4829C08G18/7664C08L23/12
Inventor 秦传睿陆伟李金亮亓冠圣程卫民胡相明王栋贺正龙
Owner SHANDONG UNIV OF SCI & TECH
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