CN105566593B - High-compatibility water glass modified polyurethane grouting material and preparation method thereof - Google Patents
High-compatibility water glass modified polyurethane grouting material and preparation method thereof Download PDFInfo
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- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- 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
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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Abstract
The invention discloses a high-compatibility water glass modified polyurethane grouting material and a preparation method thereof, wherein the high-compatibility water glass modified polyurethane grouting material is prepared from a component A and a component B in a volume ratio of 1: 1, mixing and grouting according to the proportion of 1; the component A comprises the following components in parts by mass: 40-60 parts of polyphenyl polymethylene polyisocyanate, 15-35 parts of polyurethane prepolymer containing hydrophilic chain segments, 25 parts of ester curing agent, 0.01-0.1 part of catalyst and 0.05-0.15 part of stabilizer; the component B is liquid sodium silicate water glass with the modulus of 2.0-3.0 and the baume degree of 40-50 DEG Be. The product has excellent flame retardance and antistatic performance, better mechanical property, no foaming when meeting moist coal rock mass and no reduction of reinforcement strength. Moderate viscosity, convenient operation and long shelf life.
Description
One, the technical field
The invention relates to a polyurethane grouting material and a preparation method thereof, in particular to a high-compatibility water glass modified polyurethane grouting material and a preparation method thereof, belonging to the technical field of modified polyurethane.
Second, background Art
The loose coal stratum structure is an important hidden danger threatening the safe production of coal mines. These loose structures often experience roof fall, fracture, collapse, etc. when subjected to significant underground pressures. The loose and broken coal rock mass can be effectively and rapidly cemented into a whole through the grouting material, so that the compressive resistance of the whole coal rock layer is improved, and accidents are prevented.
Commonly used grouting materials include cement-based grouting materials, epoxy resin grouting materials, phenolic resin grouting materials, polyurethane grouting materials and water glass grouting materials. And the specific defects of the materials limit the further application of the materials, so that the compounding of the materials is a good method for improving the comprehensive performance of the materials.
The polyurethane material has good mechanical property, but has poor flame retardant and antistatic properties and higher cost; the cheap water glass grouting material has excellent antistatic and flame retardant properties and has the defect of poor mechanical properties. The comprehensive performance of the grouting material can be improved by using the water glass modified polyurethane. However, the isocyanate is an oil-soluble substance, the water glass is a water-soluble substance, the compatibility of the isocyanate and the water glass is poor, and the mechanical strength of the composite material is obviously lower than that of polyurethane.
Third, the invention
Aiming at the problems, the invention aims to provide a high-compatibility water glass modified polyurethane grouting material and a preparation method thereof, and aims to solve the technical problems of improving the compatibility of polyurethane and water glass and reducing the separation degree of the two phases. The grouting material has adjustable consolidation time, high strength of a consolidated body and long shelf life.
The invention relates to a high-compatibility water glass modified polyurethane grouting material, which is prepared from a component A and a component B in a volume ratio of 1: 1, mixing and grouting according to the proportion of 1;
the component A comprises the following components in parts by mass:
the polyphenyl polymethylene polyisocyanate is available from Tantawa polyurethane, Inc.;
the ester curing agent is selected from one or more of glycerol triacetate, ethyl acetate and dibutyl phthalate.
The catalyst is selected from one or more of lead isooctanoate, stannous octoate, triethylamine, triethylene diamine, N-dimethylbenzylamine and N, N-dimethylcyclohexylamine.
The stabilizer is selected from one or more of benzoic acid, phosphoric acid, acetic acid and sulfuric acid.
The component B is liquid sodium silicate glass with the modulus of 2.0-3.0 and the baume degree of 40-50 DEG Be, and is purchased from Qingdao Dongyue sodium silicate Limited company.
The preparation method of the high-compatibility water glass modified polyurethane grouting material comprises the following steps:
(1) adding an ester curing agent into MDI or TDI, wherein the molar ratio of isocyanate groups to hydroxyl groups is 2-4: 1, dripping polyhydric alcohol in the proportion of 1, reacting for 3 hours at the temperature of 60-120 ℃, and obtaining a polyurethane prepolymer containing a hydrophilic chain segment after the reaction is finished; adding polyphenyl polymethylene polyisocyanate, a catalyst and a stabilizer into the polyurethane prepolymer containing the hydrophilic chain segment, uniformly stirring to obtain a component A, and sealing and storing;
the polyol is composed of one or more of polyester polyol with the number average molecular weight of 200-1000 and polyethylene glycol with the number average molecular weight of 200-1000.
The polyester polyol is available from Jining HuaKai resin Co., Ltd, under the designation PBA-580.
(2) At the temperature of 10-50 ℃, mixing the component A and the component B according to the volume ratio of 1: 1, mixing and grouting by using a double-liquid mixing grouting machine, wherein the curing time is 40-300 s.
According to the invention, hydrophilic polyethylene glycol and polyester polyol chain segments are introduced into oil-soluble isocyanate, so that the hydrophilicity of the isocyanate is improved on the one hand; on the other hand, the higher cohesive energy of the polyester polyol is utilized to enhance the adhesive property and the cohesive force of the material, so that the compatibility is increased and the mechanical property is improved when the two phases are blended. The compressive strength of the composite grouting material can reach 50MPa, the tensile strength can reach 22.5MPa, and the bonding strength can be 4.5 MPa.
Compared with the current grouting material, the invention has the following advantages:
1. excellent flame retardant and antistatic performance and good mechanical performance of the material.
2. The curing time can be continuously adjusted from 40s to 300s and the shelf life is longer by adjusting the using amount of the catalyst, the consolidation time can reach 300s when the catalyst is 0.01 part, and the consolidation time is 40s when the catalyst is 0.1 part. The curing reaction has the exothermicity of less than 100 ℃ and is safe to use.
3. The slurry has moderate viscosity and good permeability.
4. The cost is greatly reduced compared with that of the polyurethane grouting material.
Description of the drawings
FIG. 1 is a scanning electron micrograph of a cross section of a common water glass polyurethane composite grouting material.
FIG. 2 is a scanning electron microscope photograph of a cross section of the high-compatibility water glass modified polyurethane grouting material.
It can be seen that the small particles produced in FIG. 2 are finer because the prepolymer improves the compatibility of the two phases, making the two phases more uniformly dispersed during blending and forming smaller droplets, thereby improving the mechanical properties after curing.
Fifth, detailed description of the invention
Example 1: comparative example-common water glass polyurethane composite grouting material
1. Adding 60 kg of polyphenyl polymethylene polyisocyanate, 50g of phosphoric acid and 30g of triethylene diamine into 20 kg of glycerol triacetate at the temperature of 30 ℃, uniformly stirring to obtain a component A,
2. mixing a component A and a component B (the component B is liquid sodium silicate sodium glass with the modulus of 2.8 and the baume degree of 48 DEG Be) according to the volume ratio of 1: 1, mixing by a double-liquid mixing grouting machine.
The performance test results are as follows:
heat storage temperature: 80 deg.C
And (3) consolidation time: 144s of
Compressive strength: 24MPa
Sand fixation strength: 13MPa
Bonding strength: 2.1MPa
Tensile strength: 4.7MPa
Oxygen index: 32
Surface resistance: 105Ω
Days of storage: 90 days
Example 2:
1. adding 20 kg of glycerol triacetate into 10 kg of MDI at the temperature of 30 ℃, uniformly stirring, then dropwise adding 5 kg of dehydrated polyethylene glycol 400, controlling the reaction temperature to be 80 ℃, reacting for 3h, adding 44 kg of polyphenyl polymethylene polyisocyanate, 50g of phosphoric acid and 30g of triethylene diamine into the reaction solution after the reaction is finished, uniformly stirring to obtain 79 kg of component A, and sealing and storing; the component B is liquid sodium silicate water glass with the modulus of 2.5 and the baume degree of 47 DEG Be.
2. At 10 ℃, mixing the component A and the component B according to the volume ratio of 1: 1, mixing by a double-liquid mixing grouting machine.
The performance test results are as follows:
heat storage temperature: 80 deg.C
And (3) consolidation time: 150s
Compressive strength: 45MPa
Sand fixation strength: 20MPa
Bonding strength: 4MPa
Tensile strength: 17MPa
Oxygen index: 32
Surface resistance: 105Ω
Days of storage: 90 days
Example 3:
1. at the temperature of 30 ℃, adding 20 kg of glycerol triacetate into 10 kg of MDI, stirring uniformly, then dropwise adding 6.69 kg of a mixed solution of dehydrated polyester polyol PBA-580 and PEG-400 (wherein the weight of PBA-5805 kg and the weight of PEG-4001.69 kg), and controlling the reaction temperature to 80 ℃ for reaction for 3 h; after the reaction, 44 kg of polyphenyl polymethylene polyisocyanate, 50g of phosphoric acid and 40g of triethylene diamine are added, and the mixture is uniformly stirred to obtain 80.78 kg of slurry, namely the component A, and the component A is sealed and stored. The component B is liquid sodium silicate water glass with the modulus of 2.8 and the baume degree of 48 DEG Be.
2. And (2) mixing the component A and the component B according to the volume ratio of 1: 1, mixing by a double-liquid mixing grouting machine.
The performance test results are as follows:
heat storage temperature: 87 ℃ C
And (3) consolidation time: 107s
Compressive strength: 50MPa
Sand fixation strength: 25MPa
Bonding strength: 4.5MPa
Tensile strength: 22.5MPa
Oxygen index: 32
Surface resistance: 105Ω
Days of storage: 90 days
As can be seen from the comparison of examples 1, 2 and 3, the addition of the prepolymer can significantly improve the bonding, compression resistance, sand fixation and tensile strength of the material. It can be seen from the section scanning electron microscope (fig. 1 and fig. 2) of the material (fig. 1 is a sample prepared in example 1, and fig. 2 is a sample prepared in example two), that the addition of the prepolymer increases the compatibility of the two phases. This is because by introducing hydrophilic molecular segments into the isocyanate, the originally lipophilic isocyanate can be made more compatible with aqueous sodium silicate without any further addition of additional surfactants. Better compatibility means that the smaller the particles formed from the slip-casting material, the smaller the particle diameter, the better the permeability of the material, and the lower the phase separation after final curing, the better the mechanical properties of the material.
Claims (2)
1. A preparation method of a high-compatibility water glass modified polyurethane grouting material is characterized by comprising the following steps:
(1) adding 20 kg of glycerol triacetate into 10 kg of MDI at the temperature of 30 ℃, uniformly stirring, then dropwise adding 5 kg of dehydrated polyethylene glycol 400, controlling the reaction temperature to be 80 ℃, reacting for 3h, adding 44 kg of polyphenyl polymethylene polyisocyanate, 50g of phosphoric acid and 30g of triethylene diamine into the reaction solution after the reaction is finished, uniformly stirring to obtain 79 kg of a component A, and sealing and storing; the component B is liquid sodium silicate water glass with the modulus of 2.5 and the baume degree of 47 DEG Be;
(2) at 10 ℃, mixing the component A and the component B according to the volume ratio of 1: 1, mixing by a double-liquid mixing grouting machine.
2. A preparation method of a high-compatibility water glass modified polyurethane grouting material is characterized by comprising the following steps:
(1) at the temperature of 30 ℃, adding 20 kg of glycerol triacetate into 10 kg of MDI, stirring uniformly, then dropwise adding 6.69 kg of dehydrated mixed solution of 5 kg of polyester polyol PBA-580 and 1.69 kg of PEG-400, and reacting for 3h at the temperature of 80 ℃; after the reaction is finished, adding 44 kg of polyphenyl polymethylene polyisocyanate, 50g of phosphoric acid and 40g of triethylene diamine, uniformly stirring to obtain 80.78 kg of slurry, namely a component A, and sealing and storing; the component B is liquid sodium silicate water glass with the modulus of 2.8 and the baume degree of 48 DEG Be;
(2) and (2) mixing the component A and the component B according to the volume ratio of 1: 1, mixing by a double-liquid mixing grouting machine.
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| CN106543688B (en) * | 2016-11-22 | 2019-02-26 | 山东科技大学 | A kind of organic/inorganic nano combined casting material and preparation method thereof |
| CN108948325B (en) * | 2018-07-05 | 2021-01-05 | 山西凝固力新型材料有限公司 | Composite filling foam material for mine and preparation method thereof |
| CN110256647A (en) * | 2019-06-21 | 2019-09-20 | 山西誉邦科技股份有限公司 | A kind of high flame-retardant foamed material blocked for transporting coal railway carriage |
| CN110257029A (en) * | 2019-07-11 | 2019-09-20 | 山东润义金新材料科技股份有限公司 | Gas discharge in mine hole hole sealing bag plugging material and preparation method thereof |
| CN110669200A (en) * | 2019-10-24 | 2020-01-10 | 淮南东华欧科矿山支护设备有限责任公司 | Low-temperature modified grouting reinforcement material |
| CN111377689B (en) * | 2020-03-26 | 2022-02-22 | 中煤科工集团重庆研究院有限公司 | High-strength composite grouting reinforcement material with island structure and preparation method thereof |
| CN111777854A (en) * | 2020-07-23 | 2020-10-16 | 杭州每步材料科技有限公司 | Novel environment-friendly flame-retardant polyurethane grouting material and preparation method thereof |
| CN112250811A (en) * | 2020-10-20 | 2021-01-22 | 陕西煤业化工技术研究院有限责任公司 | High-safety delayed hole sealing material for coal mine, and preparation method and use method thereof |
| CN112225523B (en) * | 2020-10-20 | 2022-06-07 | 渭南陕煤启辰科技有限公司 | Silicate modified polyurethane reinforcing material and preparation method and application thereof |
| CN113817125A (en) * | 2021-10-23 | 2021-12-21 | 上海立投工贸有限公司 | Modified polyurethane grouting material and preparation method thereof |
| CN113956648B (en) * | 2021-11-26 | 2023-02-03 | 山西凝固力新型材料股份有限公司 | High-strength silicate/polyurethane urea-based composite reinforcing material and preparation method thereof |
| CN114213098B (en) * | 2021-12-27 | 2023-05-16 | 南京科工煤炭科学技术研究有限公司 | Low-heat grouting material and preparation method thereof |
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