Modified urea-formaldehyde resin reinforced material used for coal mine and preparation method thereof

A technology of urea-formaldehyde resin and reinforcing material is applied in the field of modified urea-formaldehyde resin reinforcing material for coal mines and its preparation field, which can solve the problems of easy foaming compressive strength, roof collapse of the sheet, and fire, so as to improve the supporting force and bonding The effect of good sex and good permeability

Active Publication Date: 2015-04-29
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of mining in coal mines, it is inevitable to encounter loose and broken coal bodies with low strength and poor stability. During the excavation process, roof caving easily occurs. In order to ensure the safety and smoothness of mining and excavation, it is necessary to treat loose and broken coal body for effective reinforcement
[0003] At present, polyurethane grouting materials are mainly used for reinforcement of loose coal bodies, but the price of polyurethane materials is relatively high. The danger of fire, and the internal reaction temperature of urea-formaldehyde resin material is lower than 60 ℃, and the use of urea-formaldehyde resin material for reinforcement can save costs while improving mining safety. It is easy to foam, resulting in low compressive strength and poor toughness, making it difficult to popularize and apply

Method used

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  • Modified urea-formaldehyde resin reinforced material used for coal mine and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Component A:

[0035] a. Add 64kg of 37% industrial formaldehyde, 26kg of urea and 0.8kg of triethanolamine into the reaction kettle, start stirring, slowly raise the temperature of the material to 75°C, and keep the temperature at 75°C for 40 minutes;

[0036] b. Put 7.2kg of melamine into the reaction kettle again, and raise the temperature of the material to 80°C, and keep it warm for 60 minutes;

[0037] c. Add 3kg of polyvinyl alcohol into the reactor, raise the temperature of the material to 85°C, and keep the temperature at 85°C for 30 minutes;

[0038] d. Lower the temperature of the material to below 40°C, and discharge the material into barrels.

[0039] Preparation of Component B: Preparation of Component B: Add 50kg of p-toluenesulfonic acid, 2.5kg of concentrated hydrochloric acid, and 47.5kg of water into the reaction kettle, mix for 1 hour at room temperature, and discharge after sampling and testing.

[0040] Component A and component B ...

Embodiment 2

[0044] Preparation of Component A:

[0045] a. Add 70kg of 35% industrial formaldehyde, 24kg of urea, 0.3kg of diethanolamine and 0.3kg of monoethanolamine into the reaction kettle, start stirring, slowly raise the temperature of the material to 75°C, and keep the temperature at 80°C for 40 minutes. ;

[0046] b. Put 8.6kg of melamine into the reaction kettle again, and raise the temperature of the material to 85°C, and keep it warm for 65 minutes;

[0047] c. Add 6kg of polyvinyl alcohol into the reactor, raise the temperature of the material to 85°C, and keep the temperature at 85-90°C for 35 minutes;

[0048] d. Lower the temperature of the material to below 40°C, and discharge the material into barrels.

[0049] Preparation of component B: 30kg of citric acid, 30kg of malic acid, 1.5kg of sulfuric acid, 3kg of phosphoric acid, and 36.5kg of water were added to the reaction kettle, mixed for 2 hours at room temperature, and discharged after passing the sampling test.

[...

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Abstract

The invention belongs to the field of chemical synthesis, specifically relates to a modified urea-formaldehyde resin reinforced material used for coal mine and a preparation method thereof, and the material is applicable to fragmented coal body reinforcing during coal mine excavation. The modified urea-formaldehyde resin reinforced material is characterized by being composed of a composition A and a composition B, wherein the composition A is modified urea-formaldehyde resin and the composition B is a modified urea-formaldehyde resin curing agent composition. The characteristics comprise that: (1) by designing the formula of the material, the reaction is performed at normal temperature, the curing speed is adjustable, the consolidation body is high in strength and good in toughness, has the compression resistance of 30 mPa or more, and is capable of substantially improving the bracing force of loose coal; (2) the internal reaction temperature of the material is relatively low and is at 60 DEG C or less; (3) the raw material solution is low in viscosity, good in permeability in coal rocks, and the caking property between the consolidation body and the coal body is good; and (4) the material employs a special pneumatic double-liquid or three-liquid grouting pump for pressure grouting, the operation is simple and the usage is convenient.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a modified urea-formaldehyde resin reinforcement material for coal mines and a preparation method thereof. It is suitable for the reinforcement of broken coal in the process of coal mining. Background technique [0002] In the process of mining in coal mines, it is inevitable to encounter loose and broken coal bodies with low strength and poor stability. During the excavation process, roof caving easily occurs. In order to ensure the safety and smoothness of mining and excavation, it is necessary to treat loose and broken coal The body is effectively reinforced. [0003] At present, polyurethane grouting materials are mainly used for reinforcement of loose coal bodies, but the price of polyurethane materials is relatively high. The danger of fire, and the internal reaction temperature of urea-formaldehyde resin material is lower than 60 ℃, and the use of urea-forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/40C08G12/38C08L61/32C08K3/16C08K5/09C08K5/092C08K3/30C08K3/32
Inventor 郝德开张丽杨化通王艳艳唐国涛
Owner SHANDONG INOV NEW MATERIALS CO LTD
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