CN110963734A - Polycarboxylate superplasticizer containing complex anti-mud structure - Google Patents
Polycarboxylate superplasticizer containing complex anti-mud structure Download PDFInfo
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- CN110963734A CN110963734A CN201911283761.1A CN201911283761A CN110963734A CN 110963734 A CN110963734 A CN 110963734A CN 201911283761 A CN201911283761 A CN 201911283761A CN 110963734 A CN110963734 A CN 110963734A
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- ester monomer
- polycarboxylate superplasticizer
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- 229920005646 polycarboxylate Polymers 0.000 title claims abstract description 10
- 239000008030 superplasticizer Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- -1 unsaturated phosphate ester Chemical class 0.000 claims abstract description 23
- 239000000178 monomer Substances 0.000 claims abstract description 22
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 230000000536 complexating effect Effects 0.000 claims abstract description 10
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 7
- KYXOYPPMBYKBFL-UHFFFAOYSA-M sodium;2-aminobenzenesulfonate Chemical compound [Na+].NC1=CC=CC=C1S([O-])(=O)=O KYXOYPPMBYKBFL-UHFFFAOYSA-M 0.000 claims abstract description 7
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 31
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 16
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 13
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 235000010323 ascorbic acid Nutrition 0.000 claims description 7
- 229960005070 ascorbic acid Drugs 0.000 claims description 7
- 239000011668 ascorbic acid Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000003472 neutralizing effect Effects 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- QLBHNVFOQLIYTH-UHFFFAOYSA-L dipotassium;2-[2-[bis(carboxymethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [K+].[K+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O QLBHNVFOQLIYTH-UHFFFAOYSA-L 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 229940120146 EDTMP Drugs 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 3
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical group [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 claims description 3
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 claims description 2
- FUKAZHDJZGBSRX-UHFFFAOYSA-N NCCNCCN.[K] Chemical compound NCCNCCN.[K] FUKAZHDJZGBSRX-UHFFFAOYSA-N 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- MJGHRBYFHDKXHI-UHFFFAOYSA-N [K].NCCN Chemical compound [K].NCCN MJGHRBYFHDKXHI-UHFFFAOYSA-N 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- DGTOAFBVEDTEBA-UHFFFAOYSA-N sodium;prop-1-ene Chemical compound [Na+].[CH2-]C=C DGTOAFBVEDTEBA-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C08F130/00—Homopolymers 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
- C08F130/02—Homopolymers 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 phosphorus
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
A polycarboxylate superplasticizer containing a complexing anti-mud structure is composed of the following raw materials in percentage by mass: sodium aminobenzenesulfonate, unsaturated phosphate ester monomer, chain transfer agent, initiator, anhydrous sodium metasilicate and the balance of deionized water. The preparation method disclosed by the invention is simple and reasonable, has the advantages of high efficiency and low cost, is firmer in structure, smaller and more uniform in pore space, can solve the problem of mud content of engineering building materials, and can reduce the slump loss of the engineering building materials under the condition of low doping amount.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a polycarboxylic acid water reducing agent containing a complexing anti-mud structure.
Background
In recent decades, with the continuous development of concrete preparation and construction technology, the application of preparing high-performance concrete by using a polycarboxylic acid water reducing agent becomes more and more extensive, and the concrete becomes a development trend of concrete. The polycarboxylic acid water reducing agent has the advantages of small mixing amount, high water reducing rate, good cement adaptability, excellent collapse degree maintaining performance, low chloride ion content and alkali content, small shrinkage, good durability and the like, and is environment-friendly, so that the polycarboxylic acid water reducing agent is widely applied to house building and infrastructure construction engineering. However, in the practical application process, the sand content has a large adverse effect on the concrete doped with the polycarboxylate superplasticizer. The interlayer structure of the soil in the sand and high-valence metal ions such as magnesium ions, aluminum ions and the like contained in the sand can adsorb a large amount of polycarboxylic acid water reducing agent molecules, so that the water reducing agent loses activity. In recent years, natural sand resources are in short supply, and as sand with high mud content is directly used in concrete, the workability of fresh concrete doped with polycarboxylic acid water reducing agent is deteriorated, the slump retention capacity is reduced, and the strength and durability of the concrete are even affected.
At present, an effective method for solving the problems is not available, the problems can be solved only by increasing the mixing amount of the polycarboxylic acid water reducing agent, the cost of concrete is increased, and meanwhile, the troubles of other processes are increased.
Disclosure of Invention
The invention aims to provide a polycarboxylic acid water reducing agent containing a complexing anti-mud structure, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a polycarboxylate superplasticizer containing a complexing anti-mud structure is composed of the following raw materials in percentage by mass: sodium aminobenzenesulfonate, unsaturated phosphate ester monomer, chain transfer agent, initiator, anhydrous sodium metasilicate and the balance of deionized water;
a preparation method of a polycarboxylic acid water reducing agent containing a complexing anti-mud structure comprises the following steps:
1) sequentially adding sodium aminobenzenesulfonate and anhydrous sodium metasilicate into a stirring kettle, uniformly mixing and stirring, stirring at the rotating speed of 160-210 revolutions per minute for 8-15 min to prepare an aqueous solution, neutralizing the aqueous solution with 30% NaOH to obtain a solution with the pH value of 6-7, and marking the solution as No. I;
2) dissolving an initiator and a complexing agent in water to prepare a solution II, beginning to drip the solution I, beginning to drip the solution II when the temperature reaches a set value, adding the initiator for 10-15 min, adding an unsaturated phosphate ester monomer and a chain transfer agent within 4.5h, reacting for 3-5 h at 80-110 ℃, stopping the reaction by using a small amount of ascorbic acid solution, and cooling to room temperature to obtain the polycarboxylic acid water reducer containing the complex anti-mud structure.
Preferably, the unsaturated phosphate ester monomer is prepared by the following method: reacting a phosphating agent with an unsaturated ester monomer at 70-90 ℃ for 1-1.5 hours, adding polyoxometallate, continuously reacting for 0.5-3 hours, adding deionized water, and continuously reacting for 1-3 hours at 90-120 ℃ to obtain the unsaturated phosphate ester monomer.
Preferably, the chain transfer agent is sodium methallylsulfonate.
Preferably, the initiator is hydrogen peroxide (H)202) And ascorbic acid (Vc).
Preferably, the complexing agent is one of ethylene diamine tetraacetic acid dipotassium salt, diethylenetriamine pentamethylene phosphonic acid potassium salt, ethylene diamine tetra methylene phosphonic acid potassium salt and bis 1, 6-hexylidene triamine pentamethylene phosphonic acid potassium salt.
The preparation method disclosed by the invention is simple and reasonable, has the advantages of high efficiency and low cost, is firmer in structure, smaller and more uniform in pore space, can solve the problem of mud content of engineering building materials, and can reduce the slump loss of the engineering building materials under the condition of low doping amount.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a polycarboxylic acid water reducing agent containing a complexing anti-mud structure comprises the following steps:
1) sequentially adding sodium aminobenzenesulfonate and anhydrous sodium metasilicate into a stirring kettle, uniformly mixing and stirring, stirring for 15min at the rotating speed of 160-210 revolutions per minute, preparing an aqueous solution, neutralizing the aqueous solution with 30% NaOH to obtain a solution with the pH value of 6-7, and marking the solution as No. I;
2) dissolving hydrogen peroxide and ethylene diamine tetraacetic acid dipotassium salt in water to prepare a solution II, beginning to dropwise add the solution I, beginning to dropwise add the solution II when the temperature reaches a set value, adding an initiator for 15min, controlling the addition of an unsaturated phosphate ester monomer and methyl allyl sodium sulfonate within 4.5h, reacting for 5 hours at 110 ℃, stopping the reaction by using a small amount of ascorbic acid solution, and cooling to room temperature to obtain the polycarboxylic acid water reducer containing the complex anti-mud structure.
The unsaturated phosphate ester monomer is prepared by the following method: reacting a phosphating agent with an unsaturated ester monomer at 90 ℃ for 1.5 hours, adding polyoxometallate to continue reacting for 3 hours, adding deionized water to continue reacting at 90 ℃ for 1 hour to obtain the unsaturated phosphate ester monomer.
Example 2
A preparation method of a polycarboxylic acid water reducing agent containing a complexing anti-mud structure comprises the following steps:
1) sequentially adding sodium aminobenzenesulfonate and anhydrous sodium metasilicate into a stirring kettle, uniformly mixing and stirring, stirring at the rotating speed of 160-210 revolutions per minute for 10min to prepare an aqueous solution, neutralizing the aqueous solution with 30% NaOH to obtain a solution with the pH value of 6-7, and marking the solution as No. I;
2) dissolving hydrogen peroxide and ethylene diamine tetramethylene phosphonic acid potassium salt in water to prepare a solution II, beginning to dropwise add the solution I, beginning to dropwise add the solution II when the temperature reaches a set value, adding an initiator for 12min, controlling the unsaturated phosphate ester monomer and the sodium methallylsulfonate to be added within 4.5h, reacting for 4 hours at 100 ℃, stopping the reaction by using a small amount of ascorbic acid solution, and cooling to room temperature to obtain the polycarboxylic acid water reducer containing the complex anti-mud structure.
The unsaturated phosphate ester monomer is prepared by the following method: reacting a phosphating agent with an unsaturated ester monomer at 80 ℃ for 1.2 hours, then adding polyoxometallate to continue reacting for 2 hours, adding deionized water to continue reacting for 2 hours at 110 ℃ to obtain the unsaturated phosphate ester monomer.
Example 3
A preparation method of a polycarboxylic acid water reducing agent containing a complexing anti-mud structure comprises the following steps:
1) sequentially adding sodium aminobenzenesulfonate and anhydrous sodium metasilicate into a stirring kettle, uniformly mixing and stirring, stirring at the rotating speed of 160-210 revolutions per minute for 8min to prepare an aqueous solution, neutralizing the aqueous solution with 30% NaOH to obtain a solution with the pH value of 6-7, and marking the solution as No. I;
2) dissolving hydrogen peroxide and ethylene diamine tetraacetic acid dipotassium salt in water to prepare a solution II, beginning to dropwise add the solution I, beginning to dropwise add the solution II when the temperature reaches a set value, adding an initiator for 10min, controlling the addition of an unsaturated phosphate ester monomer and methyl allyl sodium sulfonate within 4.5h, reacting for 3 hours at 80 ℃, stopping the reaction by using a small amount of ascorbic acid solution, and cooling to room temperature to obtain the polycarboxylic acid water reducer containing the complex anti-mud structure.
The unsaturated phosphate ester monomer is prepared by the following method: reacting a phosphating agent with an unsaturated ester monomer at 70 ℃ for 1 hour, adding polyoxometallate to continue reacting for 0.5 hour, adding deionized water to continue reacting at 120 ℃ for 3 hours to obtain the unsaturated phosphate ester monomer.
Comparative example
Adding part of water and 4-hydroxybutyl vinyl polyether macromonomer into a reaction kettle by adopting water-soluble free radical polymerization, quickly stirring, respectively and uniformly adding a mixed aqueous solution of acrylic acid, end-capped amide phosphate and propionic acid and a rongalite aqueous solution into the reaction kettle when the 4-hydroxybutyl vinyl polyether macromonomer is completely dissolved and the temperature is stabilized at 20 ℃, continuing for 2 hours, and continuing to keep the temperature for 2 hours after the reaction is finished. And cooling to room temperature, neutralizing with 30% sodium hydroxide aqueous solution until the pH value is 6.0-7.0, adding water to adjust the solid content to 40%, and obtaining the anti-mud polycarboxylic acid water reducer.
The details of the assay are given in the following table:
table 1: fluidity test for examples 1-3 and comparative example
As can be seen from Table 1, when the mixing amount of the polycarboxylic acid water reducer containing the complex anti-mud structure is 0.25%, the fluidity of the polycarboxylic acid water reducer reaches 180mm, and the polycarboxylic acid water reducer has certain loss after 1 hour and good dispersibility on concrete; the slump retaining agent shows a gradually-decreasing trend along with the prolonging of the standing time, and the fluidity trend of the slump retaining agent is obviously smaller than that of a comparative example, so that the slump retaining agent has good slump retaining performance and is better than that of the comparative example.
The concrete performance test shows that the folded solid content of the additive is 1.5% of the montmorillonite dosage, the montmorillonite used is 6g, and the test results are shown in Table 2.
Table 2: the examples 1-3 and comparative examples were tested for performance:
the compressive strength of the concrete is obviously improved and is enhanced along with time, which shows that the polycarboxylic acid water reducer containing the complex anti-mud structure has the anti-mud property and also has an obvious improvement effect on the concrete strength. Compared with concrete with the same admixture anchoring amount in the comparative example, the concrete has higher compressive strength and better performance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A polycarboxylate superplasticizer containing a complexing anti-mud structure is characterized by being implemented according to the following steps:
1) sequentially adding sodium aminobenzenesulfonate and anhydrous sodium metasilicate into a stirring kettle, uniformly mixing and stirring, stirring at the rotating speed of 160-210 revolutions per minute for 8-15 min to prepare an aqueous solution, neutralizing the aqueous solution with 30% NaOH to obtain a solution with the pH value of 6-7, and marking the solution as No. I;
2) dissolving an initiator in water to prepare a solution II, beginning to dropwise add the solution I, beginning to dropwise add the solution II when the temperature reaches a set value, adding the initiator for 10-15 min, controlling the unsaturated phosphate ester monomer and the chain transfer agent to be added within 4.5h, reacting for 3-5 h at 80-110 ℃, stopping the reaction by using a small amount of ascorbic acid solution, and cooling to room temperature to obtain the polycarboxylic acid water reducer containing the complex anti-mud structure.
2. The polycarboxylate superplasticizer containing the complex anti-mud structure according to claim 1, characterized in that the unsaturated phosphate ester monomer is prepared by the following method: reacting a phosphating agent with an unsaturated ester monomer at 70-90 ℃ for 1-1.5 hours, adding polyoxometallate, continuously reacting for 0.5-3 hours, adding deionized water, and continuously reacting for 1-3 hours at 90-120 ℃ to obtain the unsaturated phosphate ester monomer.
3. The polycarboxylate superplasticizer with the complexed anti-mud structure according to claim 1, wherein said chain transfer agent is sodium methallylsulfonate.
4. The polycarboxylate superplasticizer containing the complex anti-mud structure as claimed in claim 1, wherein said initiator is one or more of hydrogen peroxide and ascorbic acid.
5. The polycarboxylate water reducer with the complexing anti-mud structure as claimed in claim 1, wherein the complexing agent is one of dipotassium ethylenediamine tetraacetate, potassium diethylenetriamine pentamethylenephosphonic acid, potassium ethylenediamine tetramethylene phosphonic acid and potassium bis-1, 6-hexylenediamine pentamethylenephosphonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283761.1A CN110963734A (en) | 2019-12-13 | 2019-12-13 | Polycarboxylate superplasticizer containing complex anti-mud structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283761.1A CN110963734A (en) | 2019-12-13 | 2019-12-13 | Polycarboxylate superplasticizer containing complex anti-mud structure |
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| Publication Number | Publication Date |
|---|---|
| CN110963734A true CN110963734A (en) | 2020-04-07 |
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| CN201911283761.1A Withdrawn CN110963734A (en) | 2019-12-13 | 2019-12-13 | Polycarboxylate superplasticizer containing complex anti-mud structure |
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| CN (1) | CN110963734A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461359A (en) * | 2021-06-29 | 2021-10-01 | 江苏先帅科技有限公司 | Composite polycarboxylate superplasticizer for tube sheet prefabricated member and preparation method thereof |
| CN114380527A (en) * | 2022-03-23 | 2022-04-22 | 湖南凝英新材料科技有限公司 | Reinforced modifier for concrete admixture and preparation method thereof |
-
2019
- 2019-12-13 CN CN201911283761.1A patent/CN110963734A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461359A (en) * | 2021-06-29 | 2021-10-01 | 江苏先帅科技有限公司 | Composite polycarboxylate superplasticizer for tube sheet prefabricated member and preparation method thereof |
| CN113461359B (en) * | 2021-06-29 | 2022-05-10 | 江苏先帅科技有限公司 | Composite polycarboxylate superplasticizer for tube sheet prefabricated member and preparation method thereof |
| CN114380527A (en) * | 2022-03-23 | 2022-04-22 | 湖南凝英新材料科技有限公司 | Reinforced modifier for concrete admixture and preparation method thereof |
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Application publication date: 20200407 |