CN112225848A - Inorganic spraying mortar, preparation method and application thereof, and binder - Google Patents

Inorganic spraying mortar, preparation method and application thereof, and binder Download PDF

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Publication number
CN112225848A
CN112225848A CN202011127649.1A CN202011127649A CN112225848A CN 112225848 A CN112225848 A CN 112225848A CN 202011127649 A CN202011127649 A CN 202011127649A CN 112225848 A CN112225848 A CN 112225848A
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China
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parts
inorganic
spraying
mortar
binder
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Inventor
徐文全
胡国和
虎晓东
耿耀强
安秀煜
王小军
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Weinan Shaanxi Coal Qichen Technology Co ltd
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Shaanxi Coal and Chemical Technology Institute Co Ltd
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Priority to CN202011127649.1A priority Critical patent/CN112225848A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
    • C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2641—Polyacrylates; Polymethacrylates
    • C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4829—Polyethers containing at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/67—Unsaturated compounds having active hydrogen
    • C08G18/671—Unsaturated compounds having only one group containing active hydrogen
    • C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
    • C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
    • C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
    • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J151/08—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention relates to inorganic spraying mortar and a preparation method, application and a binder thereof.A isophorone diisocyanate, polyether polyol 330N and dibutyltin dilaurate are uniformly mixed and reacted for 0.5-2 h at the temperature of 60-80 ℃; and adding hydroxyethyl methacrylate, keeping the temperature at 60-80 ℃ for 0.5-2 h, adding methyl methacrylate and benzoyl peroxide, and reacting at 60-80 ℃ for 3-5 h to obtain the binder. The inorganic spraying mortar comprises 100 parts of cement, 50-200 parts of sand, 1-5 parts of a coagulant, 5-10 parts of a thickening agent, 1-3 parts of a water reducing agent, 40-80 parts of water and 5-20 parts of a binder, and is uniformly mixed during preparation, so that the problem of cohesiveness between a traditional inorganic material and a roadway coal rock mass is solved, the inorganic spraying mortar can form a unified whole with the roadway surface coal rock mass, the problem of cracking and falling of a spraying material is effectively solved, and safe and efficient mining of coal is guaranteed.

Description

Inorganic spraying mortar, preparation method and application thereof, and binder
Technical Field
The invention relates to the technical field of building materials, in particular to inorganic spraying mortar, a preparation method, application and a binder thereof.
Background
Coal is a main energy source in China, and an underground roadway of a coal mine is a necessary way for coal mining and coal transportation. Along with the mining of coal mines, the safety accidents of mines are continuously increased, accidents such as rock falling, local collapse, roadway water permeation and gas leakage in the roadway seriously threaten the life safety of underground workers, and are not beneficial to the safe and efficient mining of coal. In order to effectively solve the problem and reduce the occurrence of accidents, the roadway must be safely protected, and the surface of the roadway is generally sprayed by cement mortar or concrete.
The prior spraying mortar has the problems of poor caking property and long curing time. In the spraying process, the mortar has poor sagging property, the spraying surface is uneven, and after the material is cured, the sprayed material is easy to crack and fall off due to the problem of cohesiveness, thereby causing serious mine accidents.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the inorganic spraying mortar and the preparation method, the application and the binder thereof, solves the problem of cohesiveness between the traditional inorganic material and the coal rock mass of the roadway, can form a unified whole with the coal rock mass on the surface of the roadway, effectively solves the problem of cracking and falling of the spraying mortar material, and ensures safe and efficient mining of coal.
The invention is realized by the following technical scheme:
the binder is prepared from the following raw materials in parts by weight:
step 1, uniformly mixing 30-50 parts of isophorone diisocyanate, 10-30 parts of polyether polyol 330N and 0.5-1 part of dibutyltin dilaurate, and reacting at 60-80 ℃ for 0.5-2 h to obtain a reaction solution A;
step 2, adding 10-30 parts of hydroxyethyl methacrylate into the reaction liquid A, and preserving heat for 0.5-2 hours at the temperature of 60-80 ℃ to obtain reaction liquid B;
and 3, adding 40-80 parts of methyl methacrylate and 0.5-1 part of benzoyl peroxide into the reaction liquid B, and reacting for 3-5 hours at the temperature of 60-80 ℃ to obtain the binder.
The inorganic spraying mortar comprises, by mass, 100 parts of cement, 50-200 parts of sand, 1-5 parts of a coagulant, 5-10 parts of a thickener, 1-3 parts of a water reducing agent, 40-80 parts of water and 5-20 parts of a binder.
Further, the water reducing agent is a naphthalene water reducing agent.
Further, the coagulant is one or more of sodium carbonate, lithium carbonate, sodium chloride, calcium chloride and calcium fluoroaluminate.
Further, the thickening agent is one or two of powdery hydroxymethyl cellulose and powdery polyvinyl alcohol.
The preparation method of the inorganic spraying mortar comprises the steps of uniformly mixing 100 parts of cement, 50-200 parts of sand, 1-5 parts of a coagulant, 1-3 parts of a water reducing agent, 5-10 parts of a thickening agent, 40-80 parts of water and 5-20 parts of a binder to obtain the inorganic spraying mortar.
Further, the water reducing agent is a naphthalene water reducing agent; the coagulant is one or more of sodium carbonate, lithium carbonate, sodium chloride, calcium chloride and calcium fluoroaluminate.
Further, the thickening agent is one or two of powdery hydroxymethyl cellulose and powdery polyvinyl alcohol.
An inorganic spray mortar obtained by the method for preparing an inorganic spray mortar according to any one of the above.
The application of the inorganic spraying mortar in the underground coal mine is characterized in that the inorganic spraying mortar is used for spraying the surface of a roadway in the underground coal mine, the spraying distance is 1-2 m, and the spraying thickness is 2-10 mm.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to an adhesive, which is characterized in that firstly, hydroxyl of polyether polyol 330N and partial isocyanic acid radical of isophorone diisocyanate are subjected to addition reaction under the catalysis of dibutyltin dilaurate to obtain polyurethane containing the isocyanic acid radical, hydroxyl in hydroxyethyl methacrylate and residual isocyanic acid radical in isophorone diisocyanate are subjected to addition reaction to obtain polyurethane containing carbon-carbon double bonds, and finally methyl methacrylate is subjected to free radical polymerization under the initiation of benzoyl peroxide and simultaneously subjected to addition reaction with double bonds on the polyurethane to obtain the adhesive. The adhesive combines the strong polarity of polyurethane and acrylic resin, and can be bonded with partial ions in concrete, so that high bonding performance can be provided for spraying mortar prepared later, the spraying mortar is uniformly sprayed on the surface of a roadway, and the problem that a spraying material cracks and falls off is solved.
The inorganic spraying mortar is prepared by taking a newly synthesized binder as a core raw material, then matching cement, sand, a water reducing agent, a coagulant, a thickening agent and water, and uniformly mixing the core raw material, the cement, the sand, the water reducing agent, the coagulant, the thickening agent and the water in a certain proportion, wherein the binder is combined with the strong polarity of polyurethane and acrylic resin and can be bonded with partial ions in formed concrete to form a whole, so that the binder provides high bonding performance for the spraying mortar, can be uniformly sprayed on the surface of a roadway and solves the problem that a spraying material cracks and falls off; and the hardening time of the mortar is further shortened under the action of the coagulant, so that the mortar can be adjusted within a certain range.
The invention relates to a preparation method of inorganic spraying mortar, which firstly synthesizes a water-soluble polymer as a binder, namely firstly hydroxyl of polyether polyol 330N and partial isocyanate of isophorone diisocyanate are subjected to addition reaction under the catalysis of dibutyltin dilaurate to obtain polyurethane containing isocyanate, hydroxyl in hydroxyethyl methacrylate and residual isocyanate in isophorone diisocyanate are subjected to addition reaction to obtain polyurethane containing carbon-carbon double bonds, finally methyl methacrylate is subjected to free radical polymerization under the initiation of benzoyl peroxide and is subjected to addition reaction with double bonds on the polyurethane to obtain the binder, then cement, sand, the binder, a water reducing agent, a coagulant, a thickening agent and water are uniformly stirred to obtain the inorganic spraying mortar, and the binder combines the strong polarities of polyurethane and acrylic resin, provides high bonding performance for spraying mortar, solves the problem of cracking and falling of a spraying material, and further shortens the hardening time of the mortar under the action of a coagulant. The spraying mortar has the characteristics of high bonding and adjustable curing time; the spraying mortar can be uniformly sprayed on the surface of a roadway, and the spraying material does not crack and fall off after being cured, so that the spraying mortar is a coal mine safety functional material and is beneficial to safety production in a coal mine.
Drawings
FIG. 1 is an overall view of the mortar obtained in example 1 of the present invention after spraying in an underground coal mine roadway.
Fig. 2 is a partially enlarged view of fig. 1.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to high-adhesion spraying mortar for an underground roadway of an inorganic coal mine, which is prepared from the following raw materials in parts by mass:
100 parts of cement, 50-200 parts of sand, 5-20 parts of binder, 1-3 parts of naphthalene water reducer, 1-5 parts of coagulant, 5-10 parts of thickener and 40-80 parts of water.
The binder is prepared from the following raw materials in parts by mass: 30-50 parts of isophorone diisocyanate, 10-30 parts of hydroxyethyl methacrylate, 10-30 parts of polyether polyol 330N, 40-80 parts of methyl methacrylate, 0.5-1 part of benzoyl peroxide and 0.5-1 part of dibutyltin dilaurate. The coagulant is one or more of sodium carbonate, lithium carbonate, sodium chloride, calcium chloride and calcium fluoroaluminate; the thickening agent is one or two of powdery hydroxymethyl cellulose and powdery polyvinyl alcohol.
Correspondingly, the high-adhesion inorganic mining spraying mortar is prepared by mixing and stirring the raw materials, and the preparation method of the adhesive comprises the following steps:
1) adding 30-50 parts of isophorone diisocyanate, 10-30 parts of polyether polyol 330N and 0.5-1 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 60-80 ℃, reacting for 0.5-2 h, and carrying out addition reaction on hydroxyl of the polyether polyol 330N and partial isocyanato of the isophorone diisocyanate under the catalysis of dibutyltin dilaurate to obtain polyurethane containing the isocyanato;
2) after the reaction is finished, continuously adding 10-30 parts of hydroxyethyl methacrylate into the reaction kettle, preserving the heat for 0.5-2 hours, and carrying out addition reaction on hydroxyl in the hydroxyethyl methacrylate and the residual isocyanic acid radical in the isophorone diisocyanate to obtain polyurethane containing carbon-carbon double bonds;
3) adding 40-80 parts of methyl methacrylate and 0.5-1 part of benzoyl peroxide into a reaction kettle, keeping the temperature for continuous reaction for 3-5 hours, carrying out free radical polymerization on the methyl methacrylate under the initiation of the benzoyl peroxide, simultaneously carrying out addition reaction with double bonds on polyurethane to obtain acrylic acid-terminated polyurethane, cooling, and discharging to obtain the solid binder.
The preparation method of the spraying mortar comprises the following steps: adding 100 parts of cement, 50-200 parts of sand, 5-20 parts of binder, 1-3 parts of naphthalene water reducer, 1-5 parts of coagulant, 5-10 parts of thickener and 40-80 parts of water into a charging bucket, and uniformly stirring to obtain the inorganic spraying mortar, wherein the binder has high polarity and can be bonded with partial ions in concrete to form a whole. And then spraying the surface of the roadway in the underground coal mine, wherein the spraying distance is 1-2 m, the spraying thickness is 2-10 mm, and the spraying distance is generally determined according to the underground space and the working pressure of spraying equipment.
Example 1
Adding 40 parts of isophorone diisocyanate, 20 parts of polyether polyol 330N and 0.5 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 75 ℃, and reacting for 1 hour. And after the reaction is finished, continuously adding 20 parts of hydroxyethyl methacrylate into the reaction kettle, and keeping the temperature for 2 hours. 70 parts of methyl methacrylate and 0.5 part of benzoyl peroxide are added into the reaction kettle, and the reaction is kept for 4 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
100 parts of cement, 200 parts of sand, 15 parts of binder, 2 parts of naphthalene water reducer, 3 parts of lithium carbonate, 5 parts of powdery hydroxymethyl cellulose and 50 parts of water are added into a charging bucket, and the mixture is stirred and mixed for 30min to obtain the inorganic spraying mortar.
And spraying the surface of the roadway in the underground coal mine, wherein the spraying distance is 1m, and the spraying thickness is 5 mm. The situation that the inorganic spraying mortar is sprayed to the underground coal mine roadway is shown in fig. 1 and fig. 2, the problem that the spraying material cracks and falls off can be solved, and the inorganic spraying mortar can be uniformly sprayed on the surface of the roadway.
Example 2
Adding 30 parts of isophorone diisocyanate, 10 parts of polyether polyol 330N and 0.5 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 60 ℃, and reacting for 1 hour. After the reaction is finished, continuously adding 15 parts of hydroxyethyl methacrylate into the reaction kettle, and keeping the temperature for 2 hours. 50 parts of methyl methacrylate and 1 part of benzoyl peroxide are added into the reaction kettle, and the reaction is kept for 4 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
adding 100 parts of cement, 100 parts of sand, 10 parts of binder, 2 parts of naphthalene water reducer, 2 parts of sodium carbonate, 5 parts of powdery polyvinyl alcohol and 40 parts of water into a charging bucket, stirring and mixing for 30min to obtain inorganic spraying mortar, and spraying the surface of a roadway under a coal mine, wherein the spraying distance is 2m, and the spraying thickness is 10 mm.
Example 3
Adding 50 parts of isophorone diisocyanate, 20 parts of polyether polyol 330N and 0.5 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 80 ℃, and reacting for 1 hour. And after the reaction is finished, continuously adding 30 parts of hydroxyethyl methacrylate into the reaction kettle, and keeping the temperature for 2 hours. 70 parts of methyl methacrylate and 0.5 part of benzoyl peroxide are added into the reaction kettle, and the reaction is kept for 4 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
adding 100 parts of cement, 200 parts of sand, 20 parts of binder, 2 parts of naphthalene water reducer, 3 parts of sodium carbonate, 5 parts of powdery hydroxymethyl cellulose and 60 parts of water into a charging bucket, stirring and mixing for 30min to obtain inorganic spraying mortar, and spraying the surface of a roadway under a coal mine, wherein the spraying distance is 1.5m, and the spraying thickness is 2 mm.
Example 4
Adding 50 parts of isophorone diisocyanate, 30 parts of polyether polyol 330N and 1 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 80 ℃, and reacting for 0.5 h. After the reaction is finished, 30 parts of hydroxyethyl methacrylate are continuously added into the reaction kettle, and the temperature is kept for 0.5 h. Adding 40 parts of methyl methacrylate and 0.5 part of benzoyl peroxide into the reaction kettle, and keeping the temperature for reacting for 3 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
adding 50 parts of cement, 200 parts of sand, 5 parts of binder, 1 part of naphthalene water reducer, 5 parts of sodium chloride, 10 parts of powdery hydroxymethyl cellulose and 80 parts of water into a charging bucket, stirring and mixing for 30min to obtain inorganic spraying mortar, and spraying the surface of a roadway under a coal mine, wherein the spraying distance is 1.5m, and the spraying thickness is 8 mm.
Example 5
Adding 50 parts of isophorone diisocyanate, 20 parts of polyether polyol 330N and 0.5 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 80 ℃, and reacting for 2 hours. After the reaction is finished, continuously adding 30 parts of hydroxyethyl methacrylate into the reaction kettle, and keeping the temperature for 1 hour. 70 parts of methyl methacrylate and 0.5 part of benzoyl peroxide are added into the reaction kettle, and the reaction is kept for 5 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
adding 100 parts of cement, 150 parts of sand, 10 parts of binder, 3 parts of naphthalene water reducer, 1 part of calcium chloride, 8 parts of powdery hydroxymethyl cellulose and 70 parts of water into a charging bucket, stirring and mixing for 30min to obtain inorganic spraying mortar, and spraying the surface of a roadway under a coal mine, wherein the spraying distance is 1.5m, and the spraying thickness is 2 mm.
Example 6
Adding 50 parts of isophorone diisocyanate, 20 parts of polyether polyol 330N and 0.5 part of dibutyltin dilaurate into a reaction kettle, uniformly stirring, heating to 80 ℃, and reacting for 1 hour. And after the reaction is finished, continuously adding 30 parts of hydroxyethyl methacrylate into the reaction kettle, and keeping the temperature for 2 hours. 70 parts of methyl methacrylate and 0.5 part of benzoyl peroxide are added into the reaction kettle, and the reaction is kept for 4 hours. And cooling and discharging to obtain the binder.
Then, preparing adhesive inorganic spraying mortar by using the product binder:
adding 100 parts of cement, 200 parts of sand, 20 parts of binder, 2 parts of naphthalene water reducer, 4 parts of calcium fluoroaluminate, 5 parts of powdery hydroxymethyl cellulose and 60 parts of water into a charging bucket, stirring and mixing for 30min to obtain inorganic spraying mortar, and spraying the surface of a roadway under a coal mine, wherein the spraying distance is 1.5m, and the spraying thickness is 2 mm.
The performance of the materials in the above embodiments is tested according to the test standards in the standard consistency water consumption, setting time and stability test method of GBT 1346/T2011 cement, GB/T17671-1999 cement mortar strength test and GB/T16777-2008 building waterproof paint test methods, and the performance indexes are listed in Table 1.
TABLE 1
Serial number Initial setting time/min Final setting time/h 28d compressive strength/MPa Adhesive strength/MPa
Example 1 22 2.5 42 3.4
Example 2 36 4 45 2.7
Example 3 32 3.5 38 4.2
Example 4 35 3.5 43 2.6
Example 5 34 3.5 42 3.1
Example 6 26 3 39 4.0
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The adhesive is characterized by being prepared from the following raw materials in parts by weight:
step 1, uniformly mixing 30-50 parts of isophorone diisocyanate, 10-30 parts of polyether polyol 330N and 0.5-1 part of dibutyltin dilaurate, and reacting at 60-80 ℃ for 0.5-2 h to obtain a reaction solution A;
step 2, adding 10-30 parts of hydroxyethyl methacrylate into the reaction liquid A, and preserving heat for 0.5-2 hours at the temperature of 60-80 ℃ to obtain reaction liquid B;
and 3, adding 40-80 parts of methyl methacrylate and 0.5-1 part of benzoyl peroxide into the reaction liquid B, and reacting for 3-5 hours at the temperature of 60-80 ℃ to obtain the binder.
2. An inorganic spraying mortar is characterized by comprising, by mass, 100 parts of cement, 50-200 parts of sand, 1-5 parts of a coagulant, 5-10 parts of a thickener, 1-3 parts of a water reducing agent, 40-80 parts of water and 5-20 parts of the binder according to claim 1.
3. The inorganic spray mortar of claim 2, wherein the water reducing agent is a naphthalene based water reducing agent.
4. The inorganic spray mortar of claim 2, wherein the set accelerator is one or more of sodium carbonate, lithium carbonate, sodium chloride, calcium chloride, and calcium fluoroaluminate.
5. The inorganic spray mortar of claim 2, wherein the thickener is one or both of powdered hydroxymethyl cellulose and powdered polyvinyl alcohol.
6. A preparation method of inorganic spraying mortar is characterized in that 100 parts of cement, 50-200 parts of sand, 1-5 parts of a coagulant, 1-3 parts of a water reducing agent, 5-10 parts of a thickener, 40-80 parts of water and 5-20 parts of the binder of claim 1 are uniformly mixed to obtain the inorganic spraying mortar.
7. The method for preparing inorganic spraying mortar according to claim 6, wherein the water reducing agent is a naphthalene water reducing agent; the coagulant is one or more of sodium carbonate, lithium carbonate, sodium chloride, calcium chloride and calcium fluoroaluminate.
8. The method for preparing the inorganic spraying mortar according to claim 6, wherein the thickener is one or both of powdery hydroxymethyl cellulose and powdery polyvinyl alcohol.
9. An inorganic spray mortar obtained by the method for producing an inorganic spray mortar according to any one of claims 6 to 8.
10. The application of the inorganic spraying mortar of claim 9 in a coal mine, wherein the inorganic spraying mortar of claim 9 is sprayed on the surface of a roadway in the coal mine, the spraying distance is 1-2 m, and the spraying thickness is 2-10 mm.
CN202011127649.1A 2020-10-20 2020-10-20 Inorganic spraying mortar, preparation method and application thereof, and binder Pending CN112225848A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103420657A (en) * 2013-08-08 2013-12-04 安徽省思维新型建材有限公司 Polyurethane cement mortar and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103420657A (en) * 2013-08-08 2013-12-04 安徽省思维新型建材有限公司 Polyurethane cement mortar and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘惠茹等: "聚(甲基丙烯酸甲酯-甲基丙烯酸羟乙酯)改性聚氨酯胶粘剂的研究", 《惠州学院学报》 *

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