CN115010880A - Anti-flocculation polycarboxylate superplasticizer and preparation method thereof - Google Patents
Anti-flocculation polycarboxylate superplasticizer and preparation method thereof Download PDFInfo
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- CN115010880A CN115010880A CN202210483347.0A CN202210483347A CN115010880A CN 115010880 A CN115010880 A CN 115010880A CN 202210483347 A CN202210483347 A CN 202210483347A CN 115010880 A CN115010880 A CN 115010880A
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- 229920005646 polycarboxylate Polymers 0.000 title claims abstract description 34
- 238000005189 flocculation Methods 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000008030 superplasticizer Substances 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910001868 water Inorganic materials 0.000 claims abstract description 54
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 230000016615 flocculation Effects 0.000 claims abstract description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 62
- 238000006243 chemical reaction Methods 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 31
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 12
- AKVUWTYSNLGBJY-UHFFFAOYSA-N 2-methyl-1-morpholin-4-ylprop-2-en-1-one Chemical compound CC(=C)C(=O)N1CCOCC1 AKVUWTYSNLGBJY-UHFFFAOYSA-N 0.000 claims description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 12
- 229910019142 PO4 Inorganic materials 0.000 claims description 12
- 125000005250 alkyl acrylate group Chemical group 0.000 claims description 12
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 12
- 239000010452 phosphate Substances 0.000 claims description 12
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 12
- 229920000728 polyester Polymers 0.000 claims description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012986 chain transfer agent Substances 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- -1 alcohol compound Chemical class 0.000 claims description 6
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims description 3
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 239000008394 flocculating agent Substances 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 3
- 150000001768 cations Chemical class 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000008719 thickening Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000012496 blank sample Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001935 peptisation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/062—Polyethers
-
- 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
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers 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
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a flocculation-resistant polycarboxylic acid water reducing agent and a preparation method thereof. According to the invention, from the aspect of the water reducing agent, the adsorption effect of cations in the residual flocculant in the machine-made sand on the polycarboxylate water reducing agent can be reduced, so that the utilization efficiency of the polycarboxylate water reducing agent is improved, and the flocculation resistance of the polycarboxylate water reducing agent is improved; from the aspect of concrete, adverse performance influences on the concrete, such as thickening, large mixing amount and water demand, serious fluidity loss, concrete strength reduction and the like, caused by the residue of the mechanical sand flocculating agent can be greatly reduced.
Description
Technical Field
The invention relates to a flocculation-resistant polycarboxylic acid water reducing agent and a preparation method thereof.
Background
Concrete, the most important civil engineering material, has the characteristics of rich raw materials, low price, simple production process, high compressive strength, good durability, wide strength grade range and the like, and is widely used for various structural engineering. The huge amount of concrete used results in gradual depletion of natural sand and mechanical sand has to be used. The machine-made sand and stone production process needs to be washed by water to control the content of impurities and mud. In order to enable the mud content and the powder content in the machine-made sand to reach the standard and control the sewage discharge amount, a flocculating agent is added in the cleaning process to improve the effect of removing mud powder, and the machine-made sand after cleaning contains a certain amount of residual flocculating agent.
The residual flocculant has a very strong adsorption effect on water reducer molecules, the using effect of the water reducer is greatly reduced, and the quality of concrete is seriously influenced, for example, the fluidity of fresh concrete is kept for a short time, and then the fresh concrete becomes viscous and is difficult to construct. And polycarboxylic acid water reducing agents having deflocculation are rarely studied.
Disclosure of Invention
The invention mainly solves the technical problem of providing the anti-flocculation polycarboxylate water reducer and the preparation method thereof, which can reduce the adsorption effect of cations in residual flocculant in machine-made sand on the polycarboxylate water reducer from the aspect of the water reducer, thereby improving the utilization efficiency of the polycarboxylate water reducer and improving the anti-flocculation property of the polycarboxylate water reducer; from the aspect of concrete, adverse performance influences on the concrete, such as thickening, large mixing amount and water demand, serious fluidity loss, concrete strength reduction and the like, caused by the residue of the mechanical sand flocculating agent can be greatly reduced.
In order to solve the technical problems, the invention adopts a technical scheme that: the anti-flocculation polycarboxylate water reducer comprises a polyester macromonomer, acrylic acid, acrylamide, methacryloyl morpholine, alkyl acrylate phosphate, sodium dodecyl benzene sulfonate, an alcohol compound, ammonium persulfate, sodium hydroxide and water, and comprises the following components in parts by weight: 300-360 parts of polyester macromonomer, 20-35 parts of acrylic acid, 50-70 parts of acrylamide, 30-40 parts of methacryloyl morpholine, 20-35 parts of alkyl acrylate phosphate, 20-35 parts of sodium dodecyl benzene sulfonate, 20-40 parts of chain transfer agent, 10-20 parts of initiator, 15-35 parts of neutralizer and 460-455 parts of water.
In a preferred embodiment of the present invention, the polyester macromonomer is polyethylene glycol dimethacrylate.
In a preferred embodiment of the invention, the chain transfer agent is an alcohol compound, and the alcohol compound is one or a compound mixture of mercaptoethanol, isopropanol or dodecyl mercaptan.
In a preferred embodiment of the invention, the initiator is ammonium persulfate.
In a preferred embodiment of the invention, the neutralizing agent is sodium hydroxide solution.
The preparation method of the deflocculation type polycarboxylate superplasticizer comprises the following steps:
s1: putting 360 parts of 300-plus-one polyester macromonomer, 20-45 parts of acrylic acid, 50-70 parts of acrylamide, 30-40 parts of methacryloyl morpholine, 20-50 parts of alkyl acrylate phosphate, 20-50 parts of sodium dodecyl benzene sulfonate and 355 parts of water into a reaction kettle, heating and stirring until the components are dissolved;
s2: measuring the reaction temperature in the kettle, and when the temperature in the kettle is 60-65 ℃, adding 20-40 parts of chain transfer agent into the reaction kettle;
s3: putting 10-20 parts of ammonium persulfate into 100 parts of water, adding into a reaction kettle after the ammonium persulfate is completely dissolved to form an ammonium persulfate solution, and finishing the dropwise adding operation within 1.5-2 h;
s4: after the ammonium persulfate solution is dripped, the temperature in the reaction kettle is raised to 80 +/-5 ℃, the constant temperature is kept for 3-4h, the temperature is reduced to room temperature after the reaction, the room temperature is kept for 1h, 15-35 parts of sodium hydroxide solution is added, and the pH is adjusted to 7 +/-0.5;
s5: the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
In a preferred embodiment of the present invention, the step S1 includes: firstly adding 260-355 parts of water into a reaction kettle, and then sequentially adding 300-360 parts of polyester macromonomer, 30-40 parts of methacryloyl morpholine, 20-50 parts of alkyl acrylate phosphate, 20-50 parts of sodium dodecyl benzene sulfonate, 20-45 parts of acrylic acid and 50-70 parts of acrylamide.
In a preferred embodiment of the present invention, in the steps S3 and S4, the ammonium persulfate solution and the sodium hydroxide are added dropwise in a dropwise manner.
The invention has the beneficial effects that: the invention provides a deflocculating type polycarboxylate superplasticizer and a preparation method thereof, which have the following advantages:
1) when the gypsum-based leveling mortar is used for the ground leveled by the leveling mortar, the same gel material has better adaptability, and the risk that the bonding part is likely to be stripped or the material layer is cracked due to different expansion rates and shrinkage rates of the materials when the environmental temperature and humidity change can be avoided;
2) the method has the characteristics of adjustable operation time, quick strength development, no need of maintenance, short construction period and the like;
3) the gypsum-based floor leveling mortar is used for the leveled floor, the applicable environment is the floor of an indoor dry area, and the absolute dry bonding strength of the material can reach 0.7-1.0 MPa;
4) the dry shrinkage rate is extremely low, even no shrinkage, the bonding mortar can be directly used for leveling and tiling at one time, and the construction process is simplified.
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 one
Adding 270 parts of water into a reaction kettle, sequentially adding 360 parts of polyethylene glycol dimethacrylate, 30 parts of methacryloyl morpholine, 20 parts of alkyl acrylate phosphate, 20 parts of sodium dodecyl benzene sulfonate, 45 parts of acrylic acid and 70 parts of acrylamide, and heating and stirring until the materials are dissolved; measuring the reaction temperature in the kettle, and when the temperature in the kettle is 60-65 ℃, adding 40 parts of isopropanol into the reaction kettle; adding 20 parts of ammonium persulfate into 100 parts of water, dropwise adding the ammonium persulfate solution into the reaction kettle after the ammonium persulfate solution is completely dissolved to finish the dropwise adding operation within 1.5 hours; after the ammonium persulfate solution is dropwise added, raising the temperature in the reaction kettle to 85 ℃, keeping the temperature for 4 hours at constant temperature, cooling to room temperature after the reaction, keeping the room temperature for 1 hour, dropwise adding 25 parts of sodium hydroxide solution, and adjusting the pH to 7; the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
Example two
Firstly, 325 parts of water is added into a reaction kettle, and then 330 parts of polyethylene glycol dimethacrylate, 40 parts of methacryloyl morpholine, 30 parts of alkyl acrylate phosphate, 30 parts of sodium dodecyl benzene sulfonate, 20 parts of acrylic acid and 60 parts of acrylamide are sequentially added, heated and stirred until the components are dissolved; measuring the reaction temperature in the kettle, and when the temperature in the kettle is 65 ℃, adding 30 parts of dodecyl mercaptan into the reaction kettle; adding 20 parts of ammonium persulfate into 100 parts of water, dropwise adding the ammonium persulfate solution into the reaction kettle after the ammonium persulfate solution is completely dissolved to finish the dropwise adding operation within 1.5 hours; after the ammonium persulfate solution is dropwise added, raising the temperature in the reaction kettle to 80 ℃, keeping the temperature constant for 3 hours, cooling to room temperature after the reaction, keeping the room temperature for 1 hour, dropwise adding 15 parts of sodium hydroxide solution, and adjusting the pH value to 7; the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
EXAMPLE III
355 parts of water are added into a reaction kettle, 300 parts of polyethylene glycol dimethacrylate, 40 parts of methacryloyl morpholine, 40 parts of alkyl acrylate phosphate, 40 parts of sodium dodecyl benzene sulfonate, 20 parts of acrylic acid and 50 parts of acrylamide are sequentially added, and the mixture is heated and stirred until the mixture is dissolved; measuring the reaction temperature in the kettle, and when the temperature in the kettle is 65 ℃, adding 20 parts of mercaptoethanol into the reaction kettle; adding 20 parts of ammonium persulfate into 100 parts of water, dropwise adding the ammonium persulfate solution into the reaction kettle after the ammonium persulfate solution is completely dissolved to finish the dropwise adding operation within 1.5 hours;
after the ammonium persulfate solution is dropwise added, raising the temperature in the reaction kettle to 75 ℃, keeping the temperature for 4 hours at constant temperature, cooling to room temperature after the reaction, keeping the room temperature for 1 hour, dropwise adding 15 parts of sodium hydroxide solution, and adjusting the pH value to 6.5; the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
Example four
Firstly, adding 260 parts of water into a reaction kettle, sequentially adding 300 parts of polyethylene glycol dimethacrylate, 40 parts of methacryloyl morpholine, 50 parts of alkyl acrylate phosphate, 50 parts of sodium dodecyl benzene sulfonate, 45 parts of acrylic acid and 70 parts of acrylamide, and heating and stirring until the materials are dissolved; measuring the reaction temperature in the kettle, and when the temperature in the kettle is 60 ℃, adding 40 parts of a mixture of isopropanol and dodecyl mercaptan in a molar ratio of 1:1 into the reaction kettle; adding 20 parts of ammonium persulfate into 100 parts of water, dropwise adding the ammonium persulfate solution into the reaction kettle after the ammonium persulfate solution is completely dissolved to form an ammonium persulfate solution, and finishing the dropwise adding operation within 2 hours; after the ammonium persulfate solution is dropwise added, raising the temperature in the reaction kettle to 75 ℃, keeping the temperature for 4 hours at constant temperature, cooling to room temperature after the reaction, keeping the room temperature for 1 hour, dropwise adding 35 parts of sodium hydroxide solution, and adjusting the pH value to 7.5; the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
Wherein, the chain transfer agent makes the chain growth free radical generate free radical transfer to adjust the relative molecular mass of the polymer, the initiator is used to form active species to initiate chain polymerization, and the neutralizer is used to adjust the pH value to 7 +/-0.5.
Comparative example (C30 pump concrete):
wherein the selected flocculating agent is cationic polyacrylamide which is most widely applied in the current sand making industry, and the molecular weight is 1200 ten thousand; the polycarboxylate superplasticizer used in the blank sample is a conventional polycarboxylate superplasticizer product sold in the market with the concentration of 40%, and the addition amount of the cementing material in the blank sample is 0.5%.
And (3) carrying out comparative performance test on the deflocculating type polycarboxylate superplasticizers obtained in the first to fourth examples and a blank sample according to the same addition amount, wherein the specific detection method is as follows: initial concrete slump expansion, 60Min concrete slump expansion and 28d concrete standard curing strength; reference is made to the standard GBT50082-2019 test method for long-term performance and durability of ordinary concrete.
The specific test results are shown in the following table:
in conclusion, the anti-flocculation polycarboxylate water reducer and the preparation method thereof provided by the invention can reduce the adsorption effect of cations in residual flocculant in machine-made sand on the polycarboxylate water reducer from the aspect of the water reducer, so that the utilization efficiency of the polycarboxylate water reducer is improved, and the anti-flocculation property of the polycarboxylate water reducer is improved; from the aspect of concrete, adverse performance influences on the concrete, such as thickening, large mixing amount and water demand, serious fluidity loss, concrete strength reduction and the like, caused by the residue of the mechanical sand flocculating agent can be greatly reduced.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (8)
1. The anti-flocculation polycarboxylate water reducer is characterized by comprising a polyester macromonomer, acrylic acid, acrylamide, methacryloyl morpholine, alkyl acrylate phosphate, sodium dodecyl benzene sulfonate, an alcohol compound, ammonium persulfate, sodium hydroxide and water, wherein the components in parts by weight are as follows: 300-360 parts of polyester macromonomer, 20-35 parts of acrylic acid, 50-70 parts of acrylamide, 30-40 parts of methacryloyl morpholine, 20-35 parts of alkyl acrylate phosphate, 20-35 parts of sodium dodecyl benzene sulfonate, 20-40 parts of chain transfer agent, 10-20 parts of initiator, 15-35 parts of neutralizer and 460-455 parts of water.
2. The deflocculating polycarboxylate water reducer according to claim 1, wherein the polyester macromonomer is polyethylene glycol dimethacrylate.
3. The flocculation-resistant polycarboxylate water reducer as claimed in claim 1, wherein the chain transfer agent is an alcohol compound, and the alcohol compound is one or a mixture of several of mercaptoethanol, isopropanol or dodecyl mercaptan.
4. The deflocculating polycarboxylate water reducer according to claim 1, wherein the initiator is ammonium persulfate.
5. The deflocculating polycarboxylate water reducer according to claim 1, wherein the neutralizing agent is sodium hydroxide solution.
6. A preparation method of the deflocculating type polycarboxylate superplasticizer applying the deflocculating type polycarboxylate superplasticizer disclosed by the claim 1-5 is characterized by comprising the following steps of:
s1: putting 360 parts of 300-plus-one polyester macromonomer, 20-45 parts of acrylic acid, 50-70 parts of acrylamide, 30-40 parts of methacryloyl morpholine, 20-50 parts of alkyl acrylate phosphate, 20-50 parts of sodium dodecyl benzene sulfonate and 355 parts of water into a reaction kettle, heating and stirring until the components are dissolved;
s2: measuring the reaction temperature in the kettle, and when the temperature in the kettle is 60-65 ℃, adding 20-40 parts of chain transfer agent into the reaction kettle;
s3: putting 10-20 parts of ammonium persulfate into 100 parts of water, adding into a reaction kettle after the ammonium persulfate is completely dissolved to form an ammonium persulfate solution, and finishing the dropwise adding operation within 1.5-2 h;
s4: after the ammonium persulfate solution is dripped, the temperature in the reaction kettle is raised to 80 +/-5 ℃, the constant temperature is kept for 3-4h, the temperature is reduced to room temperature after the reaction, the room temperature is kept for 1h, 15-35 parts of sodium hydroxide solution is added, and the pH is adjusted to 7 +/-0.5;
s5: the mass fraction of the obtained polycarboxylate superplasticizer is adjusted to 40% by adding water.
7. The deflocculating type polycarboxylate superplasticizer according to claim 6, wherein in the step S1, the method specifically comprises the following steps: firstly adding 260-355 parts of water into a reaction kettle, and then sequentially adding 300-360 parts of polyester macromonomer, 30-40 parts of methacryloyl morpholine, 20-50 parts of alkyl acrylate phosphate, 20-50 parts of sodium dodecyl benzene sulfonate, 20-45 parts of acrylic acid and 50-70 parts of acrylamide.
8. The deflocculating type polycarboxylate water reducer according to claim 6, wherein in the steps S3 and S4, the ammonium persulfate solution and the sodium hydroxide are added dropwise.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210483347.0A CN115010880A (en) | 2022-05-06 | 2022-05-06 | Anti-flocculation polycarboxylate superplasticizer and preparation method thereof |
| PCT/CN2022/129699 WO2023213064A1 (en) | 2022-05-06 | 2022-11-04 | Anti-flocculation polycarboxylate superplasticizer and preparation method therefor |
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| CN202210483347.0A CN115010880A (en) | 2022-05-06 | 2022-05-06 | Anti-flocculation polycarboxylate superplasticizer and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959848A (en) * | 2023-03-16 | 2023-04-14 | 石家庄市长安育才建材有限公司 | Concrete antiflocculant and preparation method thereof |
| WO2023213064A1 (en) * | 2022-05-06 | 2023-11-09 | 苏州市兴邦化学建材有限公司 | Anti-flocculation polycarboxylate superplasticizer and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0884290A2 (en) * | 1997-06-10 | 1998-12-16 | Nippon Shokubai Co., Ltd. | Cement admixture comprising a polycarboxylic acid and method for producing said acid |
| CN102643042A (en) * | 2012-04-20 | 2012-08-22 | 株洲加美乐素建材有限公司 | Cross-linked polycarboxylic acid water reducing agent and preparation method thereof |
| WO2019100372A1 (en) * | 2017-11-27 | 2019-05-31 | 科之杰新材料集团有限公司 | Rapid low-temperature preparation method for mixing amount low sensitive polycarboxylic acid |
| CN110317304A (en) * | 2019-07-22 | 2019-10-11 | 北京慕湖房地产开发股份有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2164619T3 (en) * | 2000-03-22 | 2012-06-26 | Sika Technology Ag | Dispersing cement polymers for high fluidity, high strength and self compacting concrete |
| CN104371079A (en) * | 2014-11-27 | 2015-02-25 | 新疆德蓝股份有限公司 | Mud-resistant polycarboxylate superplasticizer |
| CN106749955A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer |
| CN115010880A (en) * | 2022-05-06 | 2022-09-06 | 苏州市兴邦化学建材有限公司 | Anti-flocculation polycarboxylate superplasticizer and preparation method thereof |
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2022
- 2022-05-06 CN CN202210483347.0A patent/CN115010880A/en active Pending
- 2022-11-04 WO PCT/CN2022/129699 patent/WO2023213064A1/en unknown
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| EP0884290A2 (en) * | 1997-06-10 | 1998-12-16 | Nippon Shokubai Co., Ltd. | Cement admixture comprising a polycarboxylic acid and method for producing said acid |
| CN102643042A (en) * | 2012-04-20 | 2012-08-22 | 株洲加美乐素建材有限公司 | Cross-linked polycarboxylic acid water reducing agent and preparation method thereof |
| WO2019100372A1 (en) * | 2017-11-27 | 2019-05-31 | 科之杰新材料集团有限公司 | Rapid low-temperature preparation method for mixing amount low sensitive polycarboxylic acid |
| CN110317304A (en) * | 2019-07-22 | 2019-10-11 | 北京慕湖房地产开发股份有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213064A1 (en) * | 2022-05-06 | 2023-11-09 | 苏州市兴邦化学建材有限公司 | Anti-flocculation polycarboxylate superplasticizer and preparation method therefor |
| CN115959848A (en) * | 2023-03-16 | 2023-04-14 | 石家庄市长安育才建材有限公司 | Concrete antiflocculant and preparation method thereof |
| CN115959848B (en) * | 2023-03-16 | 2023-08-04 | 石家庄市长安育才建材有限公司 | Concrete deflocculant and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023213064A1 (en) | 2023-11-09 |
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Application publication date: 20220906 |