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Low-heat-release polyurethane grouting reinforcement material and preparation method thereof

A technology of grouting reinforcement and polyurethane, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high exothermic temperature of material reaction, limited application range, low thermal conductivity, etc., and achieve the increase of intermolecular distance , low exothermic temperature and high flash point

Active Publication Date: 2014-01-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane grouting material has high compressive strength, excellent bonding performance, good stability, good groutability, adjustable reaction time, etc., so it is widely used in the field of grouting reinforcement, but it is used as a reinforcement material When it is used in coal mine safety production, its disadvantage is that a large amount of heat is released during the reaction, and its thermal conductivity is low, heat is continuously accumulated inside the material, and the exothermic temperature of the material reaction is too high, which has serious safety hazards. In addition, its own cost is relatively high. high, thus greatly limiting its range of application

Method used

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  • Low-heat-release polyurethane grouting reinforcement material and preparation method thereof
  • Low-heat-release polyurethane grouting reinforcement material and preparation method thereof
  • Low-heat-release polyurethane grouting reinforcement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Put polyether polyol 303 (functionality 3, molecular weight 350, viscosity 350~550mPa s) and polyester polyol PF-2011 (functionality 2.4, molecular weight 500, viscosity 1000mPa s) in a vacuum drying oven Dry at 120°C for 1.5 hours, and seal and store after drying.

[0051] (2) When the polyether temperature drops to about room temperature (25°C), weigh 40 parts (by weight, the same below) of polyether polyol 303 and 60 parts of polyester polyol PF-2011 and place them in a dry container , and then sequentially weighed 0.5 parts of dibutyltin dilaurate (DBTDL), 0.5 parts of triethylenediamine alcohol solution (A33), 2 parts of foam stabilizer silicone oil AK-8805, 10 parts of dimethyl phosphonate ( DMMP), 200 parts of coumarone-indene resin, stirred with a glass rod for 40 s until the components were uniformly dispersed, and component A was obtained.

[0052] (3) Weigh 102 parts of polyisocyanate (PAPI) to obtain component B.

[0053] (4) Mix component A and compon...

Embodiment 2

[0057](1) Put polyether polyol 4110 (functionality 4, molecular weight 500, viscosity 3500~4500mPa s) and polyether polyol 303 (functionality 3, molecular weight 350, viscosity 350~550mPa s) in vacuum drying In the oven, dry at 120°C for 1.5h, and store in a sealed container after drying.

[0058] (2) When the polyether temperature drops to about room temperature (25°C), weigh 30 parts of polyether polyol 4110 and 70 parts of polyether polyol 303 and place them in a dry container, and then weigh 1 part of dilauric acid in turn Dibutyltin (DBTDL), 1 part alcohol solution of triethylenediamine (A33), 2 parts foam stabilizer silicone oil AK-8805, 10 parts dimethyl methylphosphonate (DMMP), 200 parts benzofuran-indene Resin, stirred with a glass rod for 40s until each component is uniformly dispersed, and component A is obtained.

[0059] (3) Weigh 135 parts of polyisocyanate PAPI to obtain component B.

[0060] (4) Mix component A and component B according to the volume ratio o...

Embodiment 3

[0064] (1) Put polyether polyol 4110 (functionality 4, molecular weight 500, viscosity 3500~4500mPa s) and aromatic polyester polyol PF-2011 (functionality 2.4, molecular weight 500, viscosity 1000mPa s) in the Dry in a vacuum oven at 120°C for 1.5 hours, and store in a sealed container after drying.

[0065] (2) When the temperature of the polyether drops to about room temperature (25°C), weigh 30 parts of polyether polyol 4110 and 70 parts of aromatic polyester polyol PF-2011 in a dry container, and then weigh 0.5 Parts of dibutyltin dilaurate (DBTDL), 0.5 parts of alcoholic solution of triethylenediamine (A33), 2 parts of foam stabilizer silicone oil AK-8805, 7 parts of dimethyl methylphosphonate, 3 parts of trichloroethyl Phosphate ester, 200 parts of coumarone-indene resin, stirred with a glass rod for 40s until the components are evenly dispersed, and the reinforcement material component A is obtained.

[0066] (3) Weigh 93 parts of polyisocyanate PAPI to obtain reinfor...

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Abstract

The invention discloses a low-heat-release polyurethane grouting reinforcement material and a preparation method thereof. The low-heat-release polyurethane grouting reinforcement material comprises the following raw materials in parts by mass: 100 parts of polymer polyol, 0.5 to 3.5 parts of amine catalyst, 0.5 to 3.5 parts of tin catalyst, 1 to 4 parts of foam stabilizer, 10 to 50 parts of fire retardant, 50 to 200 parts of adhesive coumarone-indene resin and 100 to 200 parts of isocyanate, wherein the polymer polyol is polyether polyol and / or polyester polyol. The preparation method is simple, the prepared grouting reinforcement material is low in cost and high in curing speed, the reaction heat release temperature is low in the curing process, and the solidification body formed by curing has excellent physical and mechanical properties and is particularly suitable for guaranteeing safety operation under a coal mine.

Description

1. Technical field [0001] The invention relates to a polyurethane material and a preparation method thereof, in particular to a low-exothermic polyurethane grouting reinforcement material and a preparation method thereof. 2. Background technology [0002] Polyurethane grouting material has high compressive strength, excellent bonding performance, and has the advantages of good stability, good groutability, adjustable reaction time, etc., so it is widely used in the field of grouting reinforcement, but as a reinforcement material When applied to coal mine safety production, its disadvantage is that a large amount of heat is released during the reaction, and its own thermal conductivity is low, heat is continuously accumulated inside the material, and the exothermic temperature of the material reaction is too high, which has serious safety hazards, and its own cost is relatively high. high, thus greatly limiting its application range. 3. Contents of the invention [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/42C08K3/32C08K5/521C08K3/22C08K5/5333C08L75/08C08L75/06C08L57/00C09K8/44
Inventor 丁运生刘玉亭刘志孙晓红马东东蔡明
Owner HEFEI UNIV OF TECH
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