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Permanent reinforcement polyurethane material used in coal mine and preparation method thereof

A polyurethane material and permanent technology, which is applied in the field of permanent reinforced polyurethane materials for coal mines and its preparation, can solve the problems of low compressive strength, insufficient flexibility, and small curing shrinkage, so as to improve the supporting force of coal rock and the strength of consolidated body High, adjustable curing speed

Active Publication Date: 2012-07-04
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the epoxy resin reinforcing agent has good adhesion, small curing shrinkage, no gas generation during the curing process, excellent heat resistance, chemical resistance and durability, but the paste is stiff and not flexible enough; Amide reinforcement agent, low slurry viscosity, good pourability, controllable gel time, low water permeability, but expensive, low compressive strength, poor durability, corrosive, toxic slurry, will cause environmental pollution ; Acrylic reinforcement has good groutability and controllable gelation time of grout, but its compressive strength is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare 100 kilograms of component A materials, weigh 60 kilograms of polyether polyol A (polypropylene oxide ether polyol with 4 functionalities, molecular weight 600) and polyether polyol B (polycyclic polyol with 3 functionalities, molecular weight 1000) respectively. Oxygen propylene ether polyol) 15 kilograms, 0.8 kilogram of catalyzer lead (mass fraction 10%), flame retardant: 20 kilograms of trichloropropyl phosphate, 4.2 kilograms of dimethyl methyl phosphate. Add the weighed polyether polyol, catalyst, and flame retardant into the reactor in sequence, and stir at room temperature for 1 hour to obtain the qualified product of component A, which is taken out from the reactor and put into storage.

[0025] Component B is polyphenyl polymethylene polyisocyanate.

[0026] Mix A and B component materials according to the weight ratio of A:B=100:100 to make a permanent reinforced polyurethane material for coal mines. The product quality indicators after testing are as...

Embodiment 2

[0032] Prepare 100 kilograms of component A materials, weigh 55 kilograms of polyether polyol A (polypropylene oxide ether polyol with 4 functionalities, molecular weight 600) and polyether polyol B (polycyclic polyol with 3 functionalities, molecular weight 1000) respectively. Oxygen propylene ether polyol) 19 kilograms, 8 kilograms of viscosity reducer propylene carbonate, 0.5 kilogram of catalyzer lead (mass fraction 10%), 17.5 kilograms of flame retardant trichloropropyl phosphate. Add the weighed polyether polyol, viscosity reducer, catalyst, and flame retardant into the reactor in sequence, and stir at room temperature for 1 hour to obtain the qualified product of component A, which is taken out from the reactor and put into a barrel for storage .

[0033] Component B is polyphenyl polymethylene polyisocyanate.

[0034] Mix A and B component materials according to the weight ratio of A:B=100:100 to make a permanent reinforced polyurethane material for coal mines. The pr...

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Abstract

The invention belongs to the field of chemical synthesis, particularly relates to a permanent reinforcement polyurethane material used in a coal mine and a preparation method thereof. The permanent reinforcement of polyurethane material comprises A component and B component, wherein A component contains polyol, a solvent, a catalyst and a fire retardant; and B component is methylene poly[methylene (polyphenyl isocyanate)]. The polyurethane material of the invention has the following advantages: (1) the material of the invention is designed using a formulation, reacts in room temperature, has adjustable curing speed and high induration strength, can bear pressure of over 60mpa, and can improve coal-rock holding power greatly; the raw material liquid has low viscosity, good permeability in coal-rock body and good cohesiveness between the induration and the coal-rock body; (2) the relevant raw materials of the invention are green, pollution-free and volatile solvent-free, does not produce any toxic gas, is harmless to human bodies, and fully meets the operating requirements and environmental requirements for coal-rock body reinforcement; and (3) the material of the invention is filled under pressure with a special double-liquid injection pump, so that the operation is simple and the use is convenient.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a permanently reinforced polyurethane material for coal mines and a preparation method thereof. Background technique [0002] Under the coal mine, the coal seam has low compressive strength, is easy to be broken and deformed, and is prone to cracks and large fault zones; the broken and loose surrounding rock area and the crack development zone are extremely prone to roof collapse and groundwater disasters under the condition of increased dynamic pressure. The cracks and cracks can be bonded together by injecting the polymer chemical coal rock reinforcement agent into the broken rock formation of the coal seam, and the materials injected into the slurry can be strongly locked together to prevent the occurrence of cracks between the locked rock blocks. Relative movement, and finally achieve the purpose of coal and rock reinforcement. [0003] Commonly used coal and ro...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08K5/521C08L75/08
Inventor 郝德开由明张丽
Owner SHANDONG INOV NEW MATERIALS CO LTD
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