CN109053977A - A kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof - Google Patents
A kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
- C08F293/005—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
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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
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
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- 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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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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
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
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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
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0061—Block (co-)polymers
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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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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Abstract
The invention discloses a kind of collapse protective poly-carboxylic acid water reducing agents and preparation method thereof, the present invention using allyl polyether polymeric monomer, esters of acrylic acid and acrylic monomer as main monomer, using oxidation-reduction agent as initiator, chain-transferring agent is added to carry out copolymerization and pass through the block copolymer of control the acrylic acid synthesizing class and esters of acrylic acid of synthesis technology.The present invention is designed by the structure of block, has been provided simultaneously with diminishing and has been protected the performance collapsed, and the compatibility issue of traditional Compositional type function water-reducing agent and material is avoided, and the guarantor of the polycarboxylate water-reducer synthesized collapses the time for 4-6h.
Description
Technical field
The present invention relates to a kind of water-reducing agents, and in particular to a kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof.
Technical background
Polycarboxylate water-reducer due to the flexible design and change of its molecular structure, make it have low-dosage, high water reducing rate, can
The molecular structure of control, it is good dispersed, environmentally protective, adaptable the advantages that, by domestic and international numerous scholars and expert
Pay attention to and studies.Polycarboxylate water-reducer begins one's study so far from mid-term the 1980s, is promoted in synthetic technology, properties of product
Etc. there has been significant progress, compared with the states such as America and Europe, the country starts late, and grinds since phase late 1990s
System, by nearly research of technique in 20 years, the gap of home products and external product increasingly reduces, be widely applied with railway,
The key project of the related fieldss such as highway, nuclear power, water conservancy.
Slump-loss is the main problem faced in modern concrete construction, and many scholars at home and abroad are to concrete
Slump-loss mechanism and control method are furtherd investigate, and have developed it is some be capable of effectively inhibition of slump-loss it is additional
Agent product.The main function of collapse protective poly-carboxylic acid water reducing agent is that concrete mix is enable to keep flowing in a long time
Property, to meet the construction needs of modern concrete.Its main design thought is to be crosslinked and introduce response type molecule knot by being formed
Structure monomer realizes its function of slump protection.Currently, Molecular Design thinking is in the majority using the latter, directly using esters monomer in alkali
Property environment in hydrolysis properties: with the progress of hydrated cementitious, concrete hole solution is in alkalinity, and esters monomer is in alkaline environment
It can gradually hydrolyze, the carboxyl that polymer molecule is formed in hydrolytic process will constantly adsorb cement granules, disperse, thus
Ensure that concrete there can be good mobility in a long time.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof,
Technique is added dropwise using segmentation in the preparation method, can synthesize the polycarboxylate water-reducer with high-collapse-retentivity.
The technical scheme adopted by the invention is that:
The present invention provides a kind of preparation methods of collapse protective poly-carboxylic acid water reducing agent, method includes the following steps:
(1) in terms of mass parts, by 70-90 parts of allyl polyether polymeric monomer, 10-15 parts of acrylic monomer, chain-transferring agent
0.5-2.0 parts, 1-3 parts of oxidant and 70 parts of water are configured to mixed solution A；By 70-90 parts of allyl polyether polymeric monomer, acrylic acid
15-20 parts of esters monomer, 0.8-1.8 parts of chain-transferring agent, 2-3 parts of oxidant and 70 parts of water are configured to mixed solution B；By reducing agent
0.6-1.0 parts and 60 parts of water, it is configured to mixed solution C；
(2) water is added in a kettle, adjusting reaction temperature is 40-80 DEG C, under agitation, mixed solution is first added dropwise
Used time 10-15min is added dropwise in C；Then, while mixed solution A and mixed solution C 110-130min is added dropwise, mixed solution A is added dropwise
After the completion, then simultaneously mixed solution B and mixed solution C 110-130min is added dropwise, after mixed solution B is added dropwise to complete, then is added dropwise mixed
Close solution C 10-20min.
(3) after completion of dropwise addition, continue insulation reaction 1-2h, sodium hydroxide solution is then added and is neutralized to get described
Collapse protective poly-carboxylic acid water reducing agent.
For the present invention with allyl polyether polymeric monomer, acrylic compounds and acrylic ester monomer are main monomer, with oxidationreduction
Agent is initiator, and chain-transferring agent is added and carries out copolymerization and the block copolymer of acrylic acid synthesizing class and propylene esters.To synthesis
The structure of water-reducing agent is designed, and is designed by the structure of block copolymer, so that the water-reducing agent of preparation is with higher initial
Under conditions of fluidity, while ensureing that concrete there can be good mobility in a long time.Resulting polymers molecule
Structure is as follows:
Further, in step (2), 20 mass parts of water are added in a kettle.
It needs to further illustrate, allyl polyether polymeric monomer is methoxy polyethylene glycol methacrylate-styrene polymer (methoxyl group
Obtained by polyethylene glycol and methacrylated), allyl polyglycol, methacrylic polyoxyethylene ether, isopentene group
At least one of polyoxyethylene ether.
Acrylic monomer is at least one of acrylic acid, methacrylic acid, itaconic acid, succinic anhydride.
Acrylic ester monomer be methyl acrylate, methyl methacrylate, hydroxy-ethyl acrylate, hydroxypropyl acrylate,
At least one of β-acryloxy propionic, hydroxyethyl methacrylate.
Chain-transferring agent is 2- thioacetic acid, 3- mercaptopropionic acid, mercaptoethanol, methyl propane sulfonic acid sodium, one in ethyl acetate
Kind.
Oxidant is hydrogen peroxide, sodium peroxydisulfate, potassium peroxydisulfate, ammonium persulfate, one in benzoyl peroxide
Kind.
Reducing agent is one of sodium formaldehyde sulfoxylate, sodium sulfite, ascorbic acid, green vitriol.
The present invention also provides collapse protective poly-carboxylic acid water reducing agents made from above-mentioned preparation method.
The present invention has following effective effect:
(1) preparation method of collapse protective poly-carboxylic acid water reducing agent of the present invention is successively added dropwise using mixed solution A with mixed solution B
Dropwise addition technique, can effectively control the structure of polymer.
(2) present invention is designed by the structure of block, has been provided simultaneously with diminishing and has been protected the performance collapsed, has avoided traditional compounding
The compatibility issue of type function water-reducing agent and material.
(3) for the present invention with allyl polyether polymeric monomer, acrylic compounds and acrylic ester monomer are main monomer, with oxidation-
Reducing agent is initiator, and addition chain-transferring agent carries out copolymerization and the guarantor of the polycarboxylate water-reducer synthesized collapses the time for 4-6h.
Specific embodiment
The invention will be further described combined with specific embodiments below.
In following embodiments, if not otherwise indicated, agents useful for same and material are that conventional commercial can obtain.
Embodiment 1
A kind of preparation method of collapse protective poly-carboxylic acid water reducing agent the following steps are included:
(1) by 80kg isopentene group polyoxyethylene ether, 14.4kg acrylic acid, 1.2kg mercaptoethanol, 1.0kg potassium peroxydisulfate
Mixed solution A is configured to 70kg water；By 80kg isopentene group polyoxyethylene ether, 20kg methyl methacrylate, 1.2kg sulfydryl
Ethyl alcohol, 3kg potassium peroxydisulfate and 70kg water are configured to mixed solution B；By 0.4kg sodium formaldehyde sulfoxylate, 0.4kg green vitriol and
60kg water is configured to mixed solution C；
(2) 20kg water is added in a kettle, adjusting reaction temperature is 60 DEG C, opens stirring；Mixed solution C is first added dropwise
10min (refers here to that mixed solution C is added dropwise always, the dropwise addition used time is 10min), and mixed solution A is then added dropwise simultaneously and mixes
Solution C 120min (referring here to that mixed solution A and mixed solution C are added dropwise always, the dropwise addition used time is 120min) is closed, to mixed
After closing solution A completion of dropwise addition, then mixed solution B is added dropwise and mixed solution C 120min (refers here to be added dropwise always molten simultaneously
Liquid B and mixed solution C, dropwise addition used time are 120min)；After solution B completion of dropwise addition to be mixed, then mixed solution C 10min is added dropwise；
Time for adding: mixed solution A 120min, mixed solution B are 120min；Mixed solution C is 260min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer, monomer conversion 99.6% is arrived.
Embodiment 2
A kind of preparation method of collapse protective poly-carboxylic acid water reducing agent the following steps are included:
(1) by 50kg isopentene group polyoxyethylene ether, 40kg methacrylic polyoxyethylene ether, 15kg acrylic acid, 2kg
Mercaptoethanol, 3kg Ammonium Persulfate 98.5 and 70kg water are configured to mixed solution A；By 50kg isopentene group polyoxyethylene ether, 40kg methyl
Allyl polyethenoxy base ether, 20kg hydroxy-ethyl acrylate, 1.8kg mercaptoethanol, 3kg Ammonium Persulfate 98.5 and 70kg water are configured to mix
Close solution B；0.5kg sodium formaldehyde sulfoxylate, 0.5kg green vitriol and 60kg water are configured to mixed solution C；
(2) 20kg water is added in a kettle, adjusting reaction temperature is 40 DEG C, opens stirring；Mixed solution C is first added dropwise
15min (refers here to that mixed solution C is added dropwise always, the dropwise addition used time is 10min), and mixed solution A is then added dropwise simultaneously and mixes
Solution C 110min (referring here to that mixed solution A and mixed solution C are added dropwise always, the dropwise addition used time is 110min) is closed, to mixed
After closing solution A completion of dropwise addition, then mixed solution B is added dropwise and mixed solution C 130min (refers here to be added dropwise always molten simultaneously
Liquid B and mixed solution C, dropwise addition used time are 130min)；After solution B completion of dropwise addition to be mixed；Mixed solution C 10min is added dropwise again；
Time for adding: mixed solution A 110min, mixed solution B are 130min；Mixed solution C is 265min；
(3) after completion of dropwise addition, the reaction was continued 1h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer, monomer conversion 99.7% is arrived.
Embodiment 3
A kind of preparation method of collapse protective poly-carboxylic acid water reducing agent the following steps are included:
(1) by 70kg methacrylic polyoxyethylene ether, 10kg acrylic acid, 0.5kg methyl propane sulfonic acid sodium, 1kg over cure
Sour potassium and 70kg water are configured to mixed solution A；By 70kg methacrylic polyoxyethylene ether, 15kg β-acryloxy third
Acid, 0.8kg methyl propane sulfonic acid sodium, 2kg potassium peroxydisulfate and 70kg water are configured to mixed solution B；By 0.6kg ascorbic acid and 60kg
Water is configured to mixed solution C；
(2) 20kg water is added in a kettle, adjusting reaction temperature is 80 DEG C, opens stirring；Mixed solution C is first added dropwise
10min (refers here to that mixed solution C is added dropwise always, the dropwise addition used time is 10min), and mixed solution A is then added dropwise simultaneously and mixes
Solution C 130min (referring here to that mixed solution A and mixed solution C are added dropwise always, the dropwise addition used time is 130min) is closed, to mixed
After closing solution A completion of dropwise addition, then mixed solution B is added dropwise and mixed solution C 110min (refers here to be added dropwise always molten simultaneously
Liquid B and mixed solution C, dropwise addition used time are 110min)；After solution B completion of dropwise addition to be mixed；Mixed solution C 20min is added dropwise again；
Time for adding: mixed solution A 130min, mixed solution B are 110min；Mixed solution C is 270min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 40kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer, monomer conversion 99.7% is arrived.
Comparative example 1
A kind of preparation method of polycarboxylate water-reducer the following steps are included:
(1) by 80kg isopentene group polyoxyethylene ether, 14.4kg acrylic acid, 1.2kg mercaptoethanol, 1.0kg potassium peroxydisulfate
Mixed solution A is configured to 70kg water；By 80kg isopentene group polyoxyethylene ether, 20kg methyl methacrylate, 1.2kg sulfydryl
Ethyl alcohol, 3kg potassium peroxydisulfate and 70kg water are configured to mixed solution B；By 0.4kg sodium formaldehyde sulfoxylate, 0.4kg green vitriol and
60kg water is configured to mixed solution C；
(2) 20kg water is added in a kettle, adjusting reaction temperature is 60 DEG C, opens stirring；Mixed solution A, B, C is same
When be added drop-wise in reaction kettle, time for adding 120min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer is arrived.
Comparative example 2
A kind of preparation method of polycarboxylate water-reducer the following steps are included:
(1) by 80kg isopentene group polyoxyethylene ether, 14.4kg acrylic acid, 1.2kg mercaptoethanol, 1.0kg potassium peroxydisulfate
Mixed solution A is configured to as reaction kettle bottom liquid with 70kg water；By 80kg isopentene group polyoxyethylene ether, 20kg methacrylic acid
Methyl esters, 1.2kg mercaptoethanol, 3kg potassium peroxydisulfate and 70kg water are configured to mixed solution B；By 0.4kg sodium formaldehyde sulfoxylate, seven water of 0.4kg
It closes ferrous sulfate and 30kg water is configured to mixed solution C；
(2) adjusting reaction temperature is 25 DEG C, opens stirring；10min first is added dropwise in mixed solution C, then mixed solution B and
Mixed solution C is added dropwise simultaneously, mixed solution B time for adding 120min；After solution B completion of dropwise addition to be mixed, then be added dropwise mixing it is molten
Liquid C10min, total time for adding are 140min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer is arrived.
Comparative example 3
A kind of preparation method of polycarboxylate water-reducer the following steps are included:
(1) by 80kg isopentene group polyoxyethylene ether, 14.4kg acrylic acid, 1.2kg mercaptoethanol, 1.0kg potassium peroxydisulfate
Mixed solution A is configured to 70kg water；By 80kg isopentene group polyoxyethylene ether, 20kg methyl methacrylate, 1.2kg sulfydryl
Ethyl alcohol, 3kg potassium peroxydisulfate and 70kg water are configured to mixed solution B；By 0.4kg sodium formaldehyde sulfoxylate, 0.4kg green vitriol and
30kg water is configured to mixed solution C；
(2) using mixed solution A and mixed solution B as reaction kettle bottom liquid, adjusting reaction temperature is 25 DEG C, opens stirring；
Mixed solution C is added drop-wise in reaction kettle, time for adding 120min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the polycarboxylate water-reducer is arrived.
Comparative example 4
A kind of preparation method of high-efficiency water-reducing agent of poly-carboxylic acid the following steps are included:
(1) by 60kg isopentene group polyoxyethylene ether, 10kg acrylic acid, 4kg methyl methacrylate, 1.2kg sulfydryl
Ethyl alcohol, potassium peroxydisulfate 3kg and 70kg water are configured to mixed solution A；By 0.175kg sodium formaldehyde sulfoxylate, 0.3kg green vitriol and
30kg water is configured to mixed solution B；
(2) 20kg water is added in reaction kettle；Adjusting reaction temperature is 25 DEG C, opens stirring；B mixed solution is first added dropwise
10min, then A mixed solution and B mixed solution is added dropwise simultaneously, after A mixed solution is added dropwise to complete, B mixed solution continues to be added dropwise
30min, time for adding: A mixed solution is 120min, and B mixed solution is 160min；
(3) after completion of dropwise addition, the reaction was continued 2h；The sodium hydroxide solution that 45kg mass concentration is 40% is eventually adding to carry out
It neutralizes to get the high-efficiency water-reducing agent of poly-carboxylic acid is arrived.
The evaluation of water-reducing rate and slump retaining is carried out to polycarboxylate water-reducer made from above-described embodiment 1-3 and comparative example 1-4.
Specific method and result are as follows:
1, water-reducing rate is evaluated
Admixtures water-reducing ratio test method is carried out by GB8076-2008 " concrete admixture " standard.Specific experiment method
It is as follows:
(1) water consumption: the slump reaches 210 ± 10mm；
(2) reference cement, dosage 360kg/m cement: are used3；
(3) stone: 5-10mm accounts for 40%, 10-20mm and accounts for 60%
(4) sand: sand in use
(5) sand coarse aggregate ratio: 43~47%
After mix-design is good, material is poured into and stirs 2min in agitated kettle, turned after taking the dish out of the pot and uniformly carry out slump examination
It tests.
Slump detection: dividing two layers and be fitted into cylinder, and every layer plugs and pounds 15 times, plugs and pounds and is carried out by export-oriented center with spiral, and second
Layer is inserted into one layer of surface, and the concrete that then will be above cylinder is erased, lift-off slump cone, after then measuring Control Measures for Concrete Slump
Height between height and slump cone is the slump.
The calculating of water-reducing rate:
Water-reducing rate=(normal concrete water consumption-is by inspection concrete water amount)/normal concrete water consumption × 100%.
Wherein, normal concrete: the concrete of additive is not mixed；By inspection concrete: mixing the concrete of additive.
The test result of water-reducing rate is as shown in table 1.
Table 1
| Embodiment | Water-reducing rate |
| Embodiment 1 | 31.1% |
| Embodiment 2 | 32.2% |
| Embodiment 3 | 30.5% |
| Comparative example 1 | 18.1% |
| Comparative example 2 | 17.9% |
| Comparative example 3 | 19.8% |
| Comparative example 4 | 30.1% |
2, slump retaining measures
According to above-mentioned slump detection method, height after the Control Measures for Concrete Slump of 0,30min, 1h, 2h, 4h, 6h is tested respectively
Height between degree and slump cone.Test result is as shown in table 2.
Table 2
As shown in Table 1, the present invention is by the block design to water-reducing agent molecular structure, the diminishing of the water-reducing agent synthesized
Rate is apparently higher than the water-reducing agent obtained in comparative example with other synthesis technologies, and water-reducing agent produced by the present invention has excellent diminishing
Property.As shown in Table 2, the concrete slump for adding water-reducing agent of the present invention collapses significantly less than the concrete for adding comparative example water-reducing agent
Degree of falling, water-reducing agent produced by the present invention have superelevation slump retaining.
Cement water reducing agent provided by the present invention and preparation method thereof is described in detail above.It is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand originally
The method and its core concept of invention.It should be pointed out that for those skilled in the art, not departing from this hair
, can be with several improvements and modifications are made to the present invention under the premise of bright principle, these improvement and modification also fall into power of the present invention
In the protection scope that benefit requires.
Claims (9)
1. a kind of preparation method of collapse protective poly-carboxylic acid water reducing agent, which is characterized in that method includes the following steps:
(1) in terms of mass parts, by 70-90 parts of allyl polyether polymeric monomer, 10-15 parts of acrylic monomer, chain-transferring agent 0.5-
2.0 parts, 1-3 parts of oxidant and 70 parts of water are configured to mixed solution A；By 70-90 parts of allyl polyether polymeric monomer, esters of acrylic acid
15-20 parts of monomer, 0.8-1.8 parts of chain-transferring agent, 2-3 parts of oxidant and 70 parts of water are configured to mixed solution B；By reducing agent 0.6-
1.0 parts and 60 parts of water, it is configured to mixed solution C；
(2) water is added in a kettle, adjusting reaction temperature is 40-80 DEG C, under agitation, mixed solution C is first added dropwise, and is dripped
Add used time 10-15min；Then, while mixed solution A is added dropwise and mixed solution C 110-130min, mixed solution A are added dropwise to complete
Afterwards, then simultaneously mixed solution B and mixed solution C 110-130min is added dropwise, after mixed solution B is added dropwise to complete, then be added dropwise mixing it is molten
Liquid C 10-20min；
(3) after completion of dropwise addition, continue insulation reaction 1-2h, then addition sodium hydroxide solution is neutralized described to get arriving
Collapse protective poly-carboxylic acid water reducing agent.
2. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that in step (2),
20 mass parts of water are added in reaction kettle.
3. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that allyl polyether is big
Monomer is methoxy polyethylene glycol methacrylate-styrene polymer, allyl polyglycol, methacrylic polyoxyethylene ether, iso-amylene
At least one of base polyoxyethylene ether.
4. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that acrylic monomer
For at least one of acrylic acid, methacrylic acid, itaconic acid, succinic anhydride.
5. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that esters of acrylic acid list
Body is methyl acrylate, methyl methacrylate, hydroxy-ethyl acrylate, hydroxypropyl acrylate, β-acryloxy propionic, methyl
At least one of hydroxy-ethyl acrylate.
6. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that chain-transferring agent 2-
One of thioacetic acid, 3- mercaptopropionic acid, mercaptoethanol, methyl propane sulfonic acid sodium, ethyl acetate.
7. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that oxidant is peroxide
Change one of hydrogen, sodium peroxydisulfate, potassium peroxydisulfate, ammonium persulfate, benzoyl peroxide.
8. the preparation method of collapse protective poly-carboxylic acid water reducing agent according to claim 1, which is characterized in that reducing agent is white to hang
One of block, sodium sulfite, ascorbic acid, green vitriol.
9. collapse protective poly-carboxylic acid water reducing agent made from the described in any item preparation methods of claim 1-8.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922546A (en) * | 2019-11-21 | 2020-03-27 | 湖北工业大学 | Phenyl hydroxyl compound ATRP method modified polycarboxylic acid slump retaining agent and preparation method thereof |
| TWI779346B (en) * | 2020-09-04 | 2022-10-01 | 漢鴻實業股份有限公司 | Additives that can inhibit the blackening of concrete |
| CN115521414A (en) * | 2022-09-29 | 2022-12-27 | 贵州石博士科技股份有限公司 | Polycarboxylic slump retaining agent and preparation method and application thereof |
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| CN110922546B (en) * | 2019-11-21 | 2022-07-05 | 湖北工业大学 | Phenyl hydroxyl compound ATRP method modified polycarboxylic acid slump retaining agent and preparation method thereof |
| TWI779346B (en) * | 2020-09-04 | 2022-10-01 | 漢鴻實業股份有限公司 | Additives that can inhibit the blackening of concrete |
| CN115521414A (en) * | 2022-09-29 | 2022-12-27 | 贵州石博士科技股份有限公司 | Polycarboxylic slump retaining agent and preparation method and application thereof |
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