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Polyurethane grouting reinforcement material and preparation method thereof

A grouting reinforcement and polyurethane technology, applied in the field of grouting reinforcement, can solve the problems of low thermal conductivity and easy leakage, and achieve the effects of high thermal conductivity, less heat release, and poor thermal conductivity improvement.

Inactive Publication Date: 2020-12-29
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic materials still have problems such as low thermal conductivity and easy leakage when phase changes occur. Combining them with carbon materials can make up for the shortcomings and obtain phase change energy storage materials with better performance and more suitable for applications.

Method used

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  • Polyurethane grouting reinforcement material and preparation method thereof
  • Polyurethane grouting reinforcement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of constant temperature additive: Weigh 80 parts of paraffin and 20 parts of graphene, place them in a mortar, grind them thoroughly for 2 hours, and obtain them after cooling to room temperature.

[0029] Preparation of component A: Add 40 parts of the mixture of polyether polyol and polyester polyol into the reaction kettle, keep stirring at 100°C and a vacuum of 0.1MPa for 2 hours, dehydrate until the moisture content is <0.05wt%, and cool to room temperature , while stirring, add 10 parts of the constant temperature additive prepared above, 5 parts of flame retardant dimethyl methylphosphonate, 0.5 parts of dibutyltin dilaurate, triethylenediamine and N,N-2 methylpiperazine Compound catalyst and 0.5 parts of modified silicone oil, and stir for 0.5 hours to obtain component A.

[0030] Preparation of component B: Add 40 parts of polymethylene polyphenyl polyisocyanate and 5 parts of dibutyl phthalate into the reaction kettle under stirring, and mix thorou...

Embodiment 2

[0034] Preparation of constant temperature additive: Weigh 70 parts of a mixture of butyl stearate and glyceryl monopalmitate and 30 parts of a mixture of carbon black and graphene, place them in a mortar, grind them thoroughly for 1.5 hours, and cool to room temperature to obtain .

[0035] Preparation of component A: Add 60 parts of polyester polyol into the reaction kettle, continue to stir for 4 hours at 110°C and a vacuum of 0.1MPa, dehydrate until the moisture content is <0.05wt%, and after cooling down to room temperature, in a stirring state Add 20 parts of the constant temperature additive prepared above, 20 parts of tris (chloroisopropyl) phosphate, the compound catalyst of 3 parts of stannous octoate and N-methylpiperazine and 3 parts of modified silicone oils, then add 0.5 parts of foam stabilizer Agent modified silicone oil, stirred for 0.5h to obtain component A.

[0036] Preparation of component B: Add 60 parts of polymethylene polyphenyl polyisocyanate and 10 ...

Embodiment 3

[0040] Preparation of constant-temperature additive: Weigh 60 parts of a mixture of palmitic acid and stearic acid and 40 parts of carbon nanotubes, a heat-conducting carbon material, and place them in a mortar, grind them thoroughly for 0.5 hours, and obtain a constant-temperature additive after cooling to room temperature, in which palmitic acid The ratio of acid and stearic acid is 1:2.

[0041] Preparation of component A: Add 50 parts of polyether polyol into the reaction kettle, continue to stir for 4 hours at 120°C and a vacuum of 0.1MPa, dehydrate until the moisture content is less than 0.05wt%, and cool down to room temperature. Add 30 parts of the constant temperature additive prepared above, 10 parts of tris(2-chloroethyl) phosphate and tris(1,3-dichloro-2-propyl) phosphate mixed flame retardant, 1 part of bis(dodecane Sulfuryl) dibutyltin, pentamethyldiethylenetriamine and pyridine composite catalyst and 2 parts of modified silicone oil, after stirring for 4 hours, ...

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Abstract

According to the polyurethane grouting reinforcement material and the preparation method thereof, on the basis that the performance of an original polyurethane grouting reinforcement material is not affected, the reaction temperature of the polyurethane grouting reinforcement material in the curing process is remarkably reduced, and the constant-temperature additive is added into the polyurethanegrouting reinforcement material; the constant-temperature additive has the characteristics of self heat absorption, high energy storage and high thermal conductivity, and can absorb a large amount ofheat when polyurethane is cured to release heat, so that reaction heat storage is reduced; and the preparation method of the polyurethane grouting reinforcement material is simple, safe and environmentally friendly, industrialization is easy to achieve, and the polyurethane grouting reinforcement material has wide development prospects.

Description

technical field [0001] The invention belongs to the technical field of grouting reinforcement, and in particular relates to a polyurethane grouting reinforcement material and a preparation method thereof. Background technique [0002] Polyurethane grouting reinforcement materials are widely used in coal and rock mass reinforcement because of their good mechanical properties, curing time, weather resistance and adjustable viscosity. However, the curing process of polyurethane is exothermic, and if it is not controlled, it is easy to generate heat accumulation, resulting in rapid local temperature rise, especially in the special environment of underground coal mines, which can easily lead to safety accidents. Aiming at frequent safety accidents such as spontaneous combustion and core burning caused by the existing polyurethane grouting materials due to high heat release and rapid heat storage during use. The new industry standard AQ 1089-2011 being revised puts forward new re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08L91/06C08K5/5333C08K3/04C08K5/101C08K13/02C08K5/521C08K5/09C09K5/14C08J9/00
CPCC08J9/0061C08J9/0095C08J2375/06C08J2375/08C08K3/04C08K5/101C08K5/521C08K13/02C08L75/06C08L75/08C09K5/14C08K3/042C08L91/06C08K5/5333C08K5/12C08K5/09
Inventor 胡国和耿耀强张音安秀煜李建军李贤良
Owner SHAANXI COAL & CHEM TECH INST
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