CN111978003A - Water-based polyhydroxy copolymer and application thereof in cement grinding aid - Google Patents
Water-based polyhydroxy copolymer and application thereof in cement grinding aid Download PDFInfo
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- CN111978003A CN111978003A CN202010956729.1A CN202010956729A CN111978003A CN 111978003 A CN111978003 A CN 111978003A CN 202010956729 A CN202010956729 A CN 202010956729A CN 111978003 A CN111978003 A CN 111978003A
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- 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
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- 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
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
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- 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
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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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
- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/06—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
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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
- C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
- C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
- C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
- C08F230/085—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/0206—Polyalkylene(poly)amines
- C08G73/0213—Preparatory process
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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
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- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a water-based polyhydroxy copolymer, which comprises the following steps: dissolving triethanolamine oleate soap, allyl succinimidyl carbonate, eugenol rutinoside and bis-trimethylsilyl vinyl phosphate in a high-boiling-point solvent to form a solution, adding an initiator into the solution, placing the solution into a microwave oven, carrying out microwave polymerization reaction for 10-15 minutes in the atmosphere of nitrogen or inert gas, taking out the solution after reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the polymer into a vacuum drying oven to be dried for 10-15 hours at the temperature of 60-70 ℃ to obtain the polyhydroxy copolymer. The cement grinding aid prepared from the polyhydroxy copolymer has the advantages of low production cost, low mixing amount, capability of effectively improving the performances of lubricity and the like of cement and the machine-hour yield, remarkable grinding-aid enhancing effect, safety in use and environmental friendliness.
Description
Technical Field
The invention relates to the technical field of cement manufacture, in particular to a water-based polyhydroxy copolymer and application thereof in a cement grinding aid.
Background
In recent years, with the development of economy and the improvement of living standard, various high-rise buildings emerge like bamboo shoots in the spring after rain. One type of base material that is essential in the construction of these high-rise buildings is cement. The cement has huge output and sales in China, and the cement industry has attracted much attention as the energy conservation and consumption reduction of the high-pollution and high-energy-consumption industry. The cement grinding aid is used in the cement production process, and the popularization of the cement grinding energy-saving technology is an important measure for developing green energy-saving cement and building a resource-saving and environment-friendly society.
The cement grinding aid is a chemical additive for improving the grinding effect and performance of cement, can be adsorbed on the surface of cement particles, plays a role in physical and chemical actions, can improve the machine-hour output of the cement under the condition of keeping the fineness of the ground cement and the power of a grinding machine unchanged, or can increase the specific surface area of the cement and improve the particle size grading of the ground cement under the condition of keeping the output of the cement and the power of the grinding machine unchanged, thereby improving the quality indexes of the cement such as strength and the like. In addition, the method can also obviously reduce energy consumption, improve the fluidity of the industrial waste residue, improve the utilization rate of the industrial waste residue and reduce environmental pollution, and has greater economic and social benefits and good development prospect.
At present, the main components of a grinding aid applied commercially are amine organic matters, polyalcohol organic matters and inorganic salts, the liquid grinding aid compounded by a plurality of small molecular substances has a plurality of defects in use, the grinding aid capacity has an upper limit, the particle distribution range of a cement product is wide, the product is coarse, the cement strength is reduced, and even the cement strength grade is influenced.
Therefore, the cement grinding aid with lower comprehensive cost and more excellent grinding-assisting and reinforcing performance is developed to meet the market demand, has wider market value and application prospect and is beneficial to promoting the rapid development of the cement grinding aid industry in China.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a cement grinding aid and a preparation method thereof, the cement grinding aid overcomes the technical problems that the traditional cement grinding aid is more or less large in doping amount, expensive, insufficient in layered settlement, large in product performance fluctuation, contains substances harmful and toxic to human bodies, and is affected in cement quality and durability, and has the advantages of low production cost, low doping amount, capability of effectively improving performances such as lubricity and machine-hour yield of cement, remarkable grinding-aid enhancing effect, safety in use and environmental friendliness.
In order to achieve the aim, the invention adopts the technical scheme that the cement grinding aid is prepared from the following raw materials in parts by weight: 50-60 parts of water-based polyhydroxy copolymer and 30-40 parts of modified hyperbranched polyethyleneimine.
Preferably, the preparation method of the aqueous polyhydroxy copolymer comprises the following steps: dissolving triethanolamine oleate soap, allyl succinimidyl carbonate, eugenol rutinoside and bis-trimethylsilyl vinyl phosphate in a high-boiling-point solvent to form a solution, adding an initiator into the solution, placing the solution into a microwave oven, carrying out microwave polymerization reaction for 10-15 minutes in the atmosphere of nitrogen or inert gas, taking out the solution after reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the polymer into a vacuum drying oven to be dried for 10-15 hours at the temperature of 60-70 ℃ to obtain the polyhydroxy copolymer.
Preferably, the mass ratio of the triethanolamine oleate soap, the allyl succinimidyl carbonate, the eugenol rutinoside, the bis-trimethylsilyl vinyl phosphate, the high-boiling-point solvent and the initiator is 2:1:2:1 (10-15) to (0.2-0.4).
Preferably, the high boiling point solvent is selected from one or more of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
Preferably, the initiator is selected from one or more of azobisisobutyronitrile and azobisisoheptonitrile; the inert gas is selected from one or more of helium, neon and argon.
Preferably, the microwave polymerization conditions are: the microwave power is 500-800W.
Preferably, the preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving hyperbranched polyethyleneimine and epoxy acrolein diethyl acetal in chloroform to form a solution, then adding an alkaline catalyst into the solution, stirring and reacting for 6-8 hours at 70-80 ℃, and then removing trichloromethane through filtration and rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
Preferably, the mass ratio of the hyperbranched polyethyleneimine, the epoxy-propylene acetal, the chloroform and the basic catalyst is (3-5): 1-2): 10-15): 0.5-1.
The alkaline catalyst is selected from one or more of potassium carbonate, sodium carbonate, potassium hydroxide and sodium hydroxide.
Preferably, the preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1) the cement grinding aid provided by the invention has the advantages of easily available raw materials, low price, simple and feasible preparation method, mild reaction conditions, low requirements on reaction equipment and suitability for industrial production.
2) The cement grinding aid provided by the invention overcomes the technical problems that the traditional cement grinding aid is more or less large in mixing amount, expensive, insufficient in layered settlement, large in product performance fluctuation, contains substances harmful and toxic to human bodies, and is affected in cement quality and durability, and has the advantages of low production cost, low mixing amount, capability of effectively improving performances such as lubricity and output per machine hour of cement, remarkable grinding-aid enhancing effect, safety in use and environmental friendliness.
3) According to the cement grinding aid provided by the invention, the modified hyperbranched polyethyleneimine is added, and the copolymerization synergistic effect of monomers containing different active groups is improved, so that the grinding aid effect in the cement grinding process is improved, and the cement slurry is more densified in the stirring, setting and hardening processes; the cement grinding aid can replace triethylamine salt, promote early hydration of cement and promote later hydration of the cement, and can improve the powder grinding effect of the cement and the performance of the cement.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The raw materials used in the following examples of the present invention were purchased from Shanghai spring Xin import and export trade Co., Ltd.
Example 1
A cement grinding aid is prepared from the following raw materials in parts by weight: 50 parts of water-based polyhydroxy copolymer and 30 parts of modified hyperbranched polyethyleneimine.
The preparation method of the water-based polyhydroxy copolymer comprises the following steps: dissolving 20g of triethanolamine oleate soap, 10g of allyl succinimidyl carbonate, 20g of eugenol rutinoside and 10g of bis (trimethylsilylated) vinyl phosphate in 100g of dimethyl sulfoxide to form a solution, adding 2g of azobisisobutyronitrile into the solution, placing the solution in a microwave oven, carrying out microwave polymerization reaction for 10 minutes in a nitrogen atmosphere, taking out the solution after the reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the polymer in a vacuum drying oven for drying for 10 hours at 60 ℃ to obtain a polyhydroxy copolymer; the polymerization conditions of the microwave polymerization are as follows: the microwave power is 500-800W.
The preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving 30g of hyperbranched polyethyleneimine and 10g of epoxy-propylene-aldehyde-acetal in 100g of chloroform to form a solution, adding 5g of potassium carbonate into the solution, stirring and reacting at 70 ℃ for 6 hours, filtering, and removing trichloromethane by rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
The preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Example 2
A cement grinding aid is prepared from the following raw materials in parts by weight: 53 parts of water-based polyhydroxy copolymer and 33 parts of modified hyperbranched polyethyleneimine.
The preparation method of the water-based polyhydroxy copolymer comprises the following steps: dissolving 20g of triethanolamine oleate soap, 10g of allyl succinimidyl carbonate, 20g of eugenol rutinoside and 10g of bis (trimethylsilylated) vinyl phosphate in 115g of N, N-dimethylformamide to form a solution, adding 2.5g of azobisisoheptonitrile into the solution, placing the solution in a microwave oven, carrying out microwave polymerization reaction for 11 minutes in helium atmosphere, taking out the solution after the reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the solution in a vacuum drying oven to be dried for 11 hours at 63 ℃ to obtain a polyhydroxy copolymer; the polymerization conditions of the microwave polymerization are as follows: the microwave power is 600W.
The preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving 35g of hyperbranched polyethyleneimine and 13g of epoxy acrolein diethyl acetal in 120g of chloroform to form a solution, then adding 6.5g of sodium carbonate into the solution, stirring and reacting at 73 ℃ for 6.5 hours, filtering, and removing trichloromethane by rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
The preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Example 3
A cement grinding aid is prepared from the following raw materials in parts by weight: 55 parts of water-based polyhydroxy copolymer and 35 parts of modified hyperbranched polyethyleneimine.
The preparation method of the water-based polyhydroxy copolymer comprises the following steps: dissolving 20g of triethanolamine oleate soap, 10g of allyl succinimidyl carbonate, 20g of eugenol rutinoside and 10g of bis (trimethylsilyl) vinyl phosphate in 125g of N-methylpyrrolidone to form a solution, adding 3g of azobisisobutyronitrile into the solution, placing the solution in a microwave oven, carrying out microwave polymerization reaction for 12 minutes in a neon atmosphere, taking out the solution after the reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the solution in a vacuum drying oven to be dried for 13 hours at 65 ℃ to obtain a polyhydroxy copolymer; the polymerization conditions of the microwave polymerization are as follows: the microwave power is 700W.
The preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving 40g of hyperbranched polyethyleneimine and 16g of epoxy-propylene-aldehyde-acetal in 135g of chloroform to form a solution, adding 7.5g of potassium hydroxide into the solution, stirring and reacting at 76 ℃ for 7 hours, filtering, and performing rotary evaporation to remove trichloromethane to obtain the modified hyperbranched polyethyleneimine.
The preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Example 4
A cement grinding aid is prepared from the following raw materials in parts by weight: 58 parts of water-based polyhydroxy copolymer and 38 parts of modified hyperbranched polyethyleneimine.
The preparation method of the water-based polyhydroxy copolymer comprises the following steps: dissolving 20g of triethanolamine oleate soap, 10g of allyl succinimidyl carbonate, 20g of eugenol rutinoside and 10g of bis (trimethylsilylated) vinyl phosphate in 140g of a high boiling point solvent to form a solution, adding 3.5g of an initiator into the solution, placing the solution in a microwave oven, carrying out microwave polymerization reaction for 13 minutes in an argon atmosphere, taking out the solution after the reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the polymer in a vacuum drying oven to dry for 10-15 hours at 60-70 ℃ to obtain a polyhydroxy copolymer, wherein the high boiling point solvent is a mixture of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone in a mass ratio of 2:3: 1; the initiator is a mixture formed by mixing azodiisobutyronitrile and azodiisoheptonitrile according to the mass ratio of 3: 5; the inert gas is a mixture formed by mixing helium and neon in a mass ratio of 2: 1; the polymerization conditions of the microwave polymerization are as follows: microwave power 750W.
The preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving 45g of hyperbranched polyethyleneimine and 18g of epoxy acrolein diethyl acetal in 140g of chloroform to form a solution, then adding 8g of sodium hydroxide into the solution, stirring and reacting at 78 ℃ for 7.5 hours, filtering, and removing trichloromethane by rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
The preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Example 5
A cement grinding aid is prepared from the following raw materials in parts by weight: 60 parts of water-based polyhydroxy copolymer and 40 parts of modified hyperbranched polyethyleneimine.
The preparation method of the water-based polyhydroxy copolymer comprises the following steps: dissolving 20g of triethanolamine oleate soap, 10g of allyl succinimidyl carbonate, 20g of eugenol rutinoside and 10g of bis (trimethylsilylated) vinyl phosphate in 150g of N, N-dimethylformamide to form a solution, adding 4g of azobisisoheptonitrile into the solution, placing the solution in a microwave oven, carrying out microwave polymerization reaction for 15 minutes in a nitrogen atmosphere, taking out the solution after the reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the solution in a vacuum drying oven to be dried for 15 hours at 70 ℃ to obtain a polyhydroxy copolymer; the polymerization conditions of the microwave polymerization are as follows: the microwave power is 800W.
The preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving 50g of hyperbranched polyethyleneimine and 20g of epoxy acrolein diethyl acetal in 150g of chloroform to form a solution, then adding 10g of potassium carbonate into the solution, stirring and reacting at 80 ℃ for 8 hours, filtering, and removing trichloromethane by rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
The preparation method of the cement grinding aid comprises the following steps: the raw materials are uniformly mixed according to a proportion and then are milled to obtain the cement grinding aid.
Comparative example
This example provides a commercially available grinding aid, type: GA-200.
When the grinding aids obtained in the above examples 1 to 5 and comparative examples were added into cement (model: PC42.5) for grinding, grinding aid performance and cement performance were tested, the grinding aid addition (mass%) was 0.1%, and the test results are shown in table 1.
TABLE 1
As can be seen from Table 1, the cement grinding aids disclosed in the examples of the present invention, when added to cement, provide higher machine-hour yield and grindability index of cement and better slurry flowability than commercially available cement grinding aids.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An aqueous polyhydroxyl copolymer, characterized in that the process for the preparation of the aqueous polyhydroxyl copolymer comprises the steps of: dissolving triethanolamine oleate soap, allyl succinimidyl carbonate, eugenol rutinoside and bis-trimethylsilyl vinyl phosphate in a high-boiling-point solvent to form a solution, adding an initiator into the solution, placing the solution into a microwave oven, carrying out microwave polymerization reaction for 10-15 minutes in the atmosphere of nitrogen or inert gas, taking out the solution after reaction, pouring the solution into acetone to precipitate a polymer, carrying out suction filtration, and placing the polymer into a vacuum drying oven to be dried for 10-15 hours at the temperature of 60-70 ℃ to obtain the polyhydroxy copolymer.
2. The aqueous polyhydroxy copolymer according to claim 1, wherein the mass ratio of triethanolamine oleate soap, allyl succinimidyl carbonate, eugenol rutinoside, bistrimethylsilyl vinyl phosphate, high boiling point solvent and initiator is 2:1:2:1 (10-15) to (0.2-0.4).
3. The aqueous polyhydroxycopolymer according to claim 1, wherein the high boiling point solvent is selected from one or more of dimethylsulfoxide, N-dimethylformamide, N-methylpyrrolidone.
4. The aqueous polyhydroxycopolymer according to claim 1, wherein the initiator is selected from one or more of azobisisobutyronitrile, azobisisoheptonitrile; the inert gas is selected from one or more of helium, neon and argon.
5. The aqueous polyhydroxy copolymer according to claim 1, wherein the microwave polymerization conditions are: the microwave power is 500-800W.
6. Use of an aqueous polyhydroxycopolymer as claimed in any one of claims 1 to 5 in a cement grinding aid.
7. The application of the water-based polyhydroxy copolymer in the cement grinding aid according to claim 6, wherein the cement grinding aid is prepared from the following raw materials in parts by weight: 50-60 parts of water-based polyhydroxy copolymer and 30-40 parts of modified hyperbranched polyethyleneimine.
8. The application of the water-based polyhydroxy copolymer in the cement grinding aid according to claim 7, wherein the preparation method of the modified hyperbranched polyethyleneimine comprises the following steps: dissolving hyperbranched polyethyleneimine and epoxy acrolein diethyl acetal in chloroform to form a solution, then adding an alkaline catalyst into the solution, stirring and reacting for 6-8 hours at 70-80 ℃, and then removing trichloromethane through filtration and rotary evaporation to obtain the modified hyperbranched polyethyleneimine.
9. The use of the aqueous polyhydroxy copolymer in cement grinding aids according to claim 8, wherein the mass ratio of the hyperbranched polyethyleneimine, the epoxy-propylene-aldehyde acetal, the trichloromethane and the basic catalyst is (3-5): 1-2): 10-15): 0.5-1.
10. The application of the water-based polyhydroxy copolymer in the cement grinding aid according to claim 8, characterized in that the alkaline catalyst is selected from one or more of potassium carbonate, sodium carbonate, potassium hydroxide and sodium hydroxide.
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| CN109354433A (en) * | 2018-11-14 | 2019-02-19 | 遵义古匡坝建材有限责任公司 | A kind of liquid cement grinding additive and its manufacturing method |
| CN109704626B (en) * | 2019-01-07 | 2021-04-02 | 湖南辰砾新材料有限公司 | Organic fluorine modified glycol amine substituted polycarboxylic acid cement grinding aid and preparation method thereof |
| CN112592133A (en) * | 2020-12-24 | 2021-04-02 | 泰安市同达建材有限公司 | Flexible early-strength concrete and preparation method thereof |
| CN112592098A (en) * | 2020-12-24 | 2021-04-02 | 泰安市同达建材有限公司 | Concrete modifying flexibilizer and preparation method thereof |
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| EP2660217A1 (en) * | 2012-05-03 | 2013-11-06 | Construction Research & Technology GmbH | Grinding aid for mineral bonding agent |
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2018
- 2018-06-20 CN CN202010956715.XA patent/CN112047657A/en not_active Withdrawn
- 2018-06-20 CN CN201810633067.7A patent/CN108751770B/en active Active
- 2018-06-20 CN CN202010956729.1A patent/CN111978003A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN108751770B (en) | 2020-11-06 |
| CN108751770A (en) | 2018-11-06 |
| CN112047657A (en) | 2020-12-08 |
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Application publication date: 20201124 |
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