CN107501482A - A kind of preparation method of low responsive type polycarboxylate water-reducer - Google Patents
A kind of preparation method of low responsive type polycarboxylate water-reducer Download PDFInfo
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- CN107501482A CN107501482A CN201710859233.0A CN201710859233A CN107501482A CN 107501482 A CN107501482 A CN 107501482A CN 201710859233 A CN201710859233 A CN 201710859233A CN 107501482 A CN107501482 A CN 107501482A
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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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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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
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
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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
- C04B2103/0059—Graft (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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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a kind of preparation method of low responsive type polycarboxylate water-reducer, comprise the following steps：(1) it is esterified；(2) sulfonation；(3) it is copolymerized.The present invention introduces ester group by lactic acid or lactate with unsaturated acid esterification, the sulfonic acid group of long-chain-segment is introduced by polymeric monomer end group sulfonation, fluoro-containing group is introduced by being copolymerized, reversible adsorption effect is produced in concrete mix, steady chemical structure, reach the purpose insensitive to soil, improve adaptability of the polycarboxylate water-reducer to concrete mix.
Description
Technical field
The invention belongs to build additive technical field, and in particular to a kind of preparation side of low responsive type polycarboxylate water-reducer
Method.
Background technology
Polycarboxylate high performance water-reducing agent is good with cement compatibility with its high water reducing rate, low slump loss, Lower alrali content
Etc. excellent performance by domestic and international extensive concern, have become the focus of countries in the world research in recent years.
The mechanism of action of polycarboxylate water-reducer, autosensitization etc. can not be controlled completely at home at present.Especially
In Practical Project, because cement type is various, many reasons such as sandstone clay content in concrete raw material, widely applying
Found in journey, polycarboxylate water-reducer is there is the deficiency of slump retaining in high temperature environments, temperature sensitivity is strong, Aggregate is contained
Mud amount sensitiveness is strong, adapts to Machine-made Sand the shortcomings of poor, and the volume of polycarboxylate water-reducer, folk prescription water consumption be slightly in concrete
There is increase, concrete mix is easy for bleeding, lamination occur, to Concrete Pumping Construction performance, mechanical property and resistance to
Long property all causes detrimental effect, leads to not meet that job site requires.
With the fast development of concrete technology, some special requirements, polycarboxylate water-reducer molecule are proposed to additive
The Degree of Structure Freedom is big, and adjustable side chain realizes the functionalized design of water reducer.Therefore, exploitation has low responsive type polycarboxylic acids diminishing
Agent tool is of great significance.
The content of the invention
It is an object of the invention to overcome prior art defect, there is provided a kind of preparation side of low responsive type polycarboxylate water-reducer
Method.
Technical scheme is as follows：
A kind of preparation method of low responsive type polycarboxylate water-reducer, comprises the following steps：
(1) it is esterified：Lactic acid or lactate, unsaturated acids, polymerization inhibitor and catalyst are mixed, leads to nitrogen protection, is warming up to
90~130 DEG C, 4~8h of insulation reaction, the method for logical nitrogen takes the water of reaction generation, wherein lactic acid or lactate and unsaturation out of
Sour mol ratio is 1: 1.5~5, and the dosage of polymerization inhibitor is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, is catalyzed
The dosage of agent is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, and reaction cools to normal temperature after terminating, and produces the
One comonomer；Above-mentioned lactate is methyl lactate or ethyl lactate；Above-mentioned unsaturated acids is acrylic acid and/or metering system
Acid；Above-mentioned catalyst is p-methyl benzenesulfonic acid and/or 98% concentrated sulfuric acid；
(2) sulfonation：The polyether macromonomer that molecular weight is 2100~2500 is mixed with sulfonating agent, leads to nitrogen protection, reaction
Temperature is 80~120 DEG C, soaking time 3-5h, and the mol ratio of polyether macromonomer and sulfonating agent is 1: 1~1.5, is added after cooling
Enter nertralizer and produce the second comonomer；
(3) it is copolymerized：By the second comonomer, the first comonomer, fluorochemical, oxidant, reducing agent, molecular regulation
Agent is reacted in water, and reaction temperature is 5~80 DEG C, and time for adding is 1.5~3h, and soaking time is 0.5~2h, must be copolymerized
Product, wherein the first comonomer is the 8~15% of the second comonomer quality, fluorochemical is the second comonomer quality
0.5~4%；Initiator is the 0.2~5% of the second comonomer quality, and reducing agent is the 0.05 of the second comonomer quality
~1%, molecular regulation agent be the second comonomer quality 0.3~1%, insulation terminate after by copolymerization product alkali adjust pH to
5~7, produce the low responsive type polycarboxylate water-reducer；Above-mentioned fluorochemical is acrylic acid trifluoro ethyl ester, methacrylic acid three
Fluorine ethyl ester, 2- fluoroacrylic methyl esters, 2- fluoropropenes acetoacetic ester and 2, at least one in 2,2- tri- fluoro- 2- perfluoroalkyl acrylates ethyl esters
Kind.
In a preferred embodiment of the invention, the polymerization inhibitor is in hydroquinones, phenthazine and diphenylamines
It is at least one.
In a preferred embodiment of the invention, the polyether macromonomer is HPEG, TPEG that molecular weight is 2400
Or VPEG type polyether macromonomers.
In a preferred embodiment of the invention, the sulfonating agent be sulfamic acid, sulphite, halogenosulfonic acid or
Sulfur trioxide.
In a preferred embodiment of the invention, the oxidant is in hydrogen peroxide, ammonium persulfate and sodium peroxydisulfate
At least one.
In a preferred embodiment of the invention, the reducing agent be 2- hydroxyl -2- sulfinatoacetic acids disodium salt,
At least one of sodium formaldehyde sulfoxylate, ferrous sulfate and sodium hydrogensulfite.
In a preferred embodiment of the invention, the molecular regulation agent is mercaptopropionic acid, mercaptoethanol, isopropanol
At least one of with tertiary sodium phosphate.
Beneficial effects of the present invention：
1st, the present invention introduces ester group by lactic acid or lactate and unsaturated acid esterification, is drawn by polymeric monomer end group sulfonation
The sulfonic acid group of long-chain-segment is entered, has produced reversible adsorption effect, reach the purpose insensitive to soil, improve polycarboxylic acids diminishing
Adaptability of the agent to concrete mix.
2nd, the present invention introduces fluoro-containing group by copolymerization, because the bond distance of the F-C keys of fluorine-containing surfactant is short, bond energy
Height, Stability Analysis of Structures so that polycarboxylate water-reducer has high surface, high thermal stability and high chemical stability, in concrete
Hyposensitivity energy is shown in mixture.
Embodiment
Technical scheme is further detailed and described below by way of embodiment.
Embodiment 1
(1) it is esterified：110g lactic acid, 216g acrylic acid, 4.32g hydroquinones are added in four-hole boiling flask, protected in nitrogen
Under shield, 60 DEG C are warming up to, 3.27g p-methyl benzenesulfonic acid is added, is warming up to 105 DEG C, insulation reaction 2h, during which with logical nitrogen with water
Method removes water, and reaction is down to room temperature after terminating, obtains the first comonomer；
(2) sulfonation：500gHPEG and 20g sulfamic acids are mixed, under nitrogen protection, are warming up to 110 DEG C, insulation reaction
5h, reaction are cooled to 50 DEG C after terminating, add 8.3g liquid caustic soda, then near room temperature, obtains the second comonomer；
(3) it is copolymerized：The comonomers of 160g second, the comonomers of 3.5g first, 1g hydrogen peroxide, 122g water are mixed, are added dropwise
2- hydroxyl -2- sulfinatoacetic acid disodiums salting liquid (0.4g2- hydroxyl -2- sulfinatoacetic acid disodium salts, 24g water), it is added dropwise
The comonomers of 19.77g first and 2g acrylic acid trifluoro ethyl ester mixed liquors, mercaptopropionic acid (0.68g mercaptopropionic acids, 24g is added dropwise
Water), reaction temperature is room temperature, time for adding 3.0h, 1h is incubated after being added dropwise, and then adds 10g liquid caustic soda, produces muting sensitive sense
Type polycarboxylate water-reducer.
Embodiment 2
(1) it is esterified：110g lactic acid, 300g methacrylic acids, 3.7g hydroquinones, 2.06g phenthazine are added to four mouthfuls
In flask, under nitrogen protection, 60 DEG C are warming up to, add 3.5g to 98% concentrated sulfuric acid, be warming up to 95 DEG C, insulation reaction 2h, the phase
Between with method of the logical nitrogen with water remove water, reaction is down to room temperature after terminating, obtains the first comonomer；
(2) sulfonation：500gTPEG and 20g sulfamic acids are mixed, under nitrogen protection, are warming up to 110 DEG C, insulation reaction
5h, reaction are cooled to 50 DEG C after terminating, add 8.3g liquid caustic soda, then near room temperature, obtains the second comonomer；
(3) it is copolymerized：The comonomers of 160g second, the comonomers of 2g first, 1.5g hydrogen peroxide, 124g water are mixed, are added dropwise
Sodium formaldehyde sulfoxylate solution (0.55g sodium formaldehyde sulfoxylates, 24g water), the comonomers of 21g first and 2g acrylic acid trifluoro ethyl ester mixed liquors, drop is added dropwise
Add mercaptopropionic acid (0.72g mercaptopropionic acids, 24g water), reaction temperature is 50 DEG C, time for adding 3.0h, after being added dropwise
1h is incubated, 10g liquid caustic soda is then added, produces low responsive type polycarboxylate water-reducer.
Embodiment 3
(1) it is esterified：By 127g methyl lactates, 144g acrylic acid, 86g methacrylic acids, 3g hydroquinones, 1.32g fen thiophenes
Piperazine is added in four-hole boiling flask, under nitrogen protection, is warming up to 60 DEG C, is added 4g to 98% concentrated sulfuric acid, is warming up to 110 DEG C, protects
Temperature reaction 2h, water during which is removed with logical method of the nitrogen with water, reaction is down to room temperature after terminating, obtains the first comonomer；
(2) sulfonation：500gVPEG and 20g sulfamic acids are mixed, under nitrogen protection, are warming up to 110 DEG C, insulation reaction
5h, reaction are cooled to 50 DEG C after terminating, add 8.3g liquid caustic soda, then near room temperature, obtains the second comonomer；
(3) it is copolymerized：The comonomers of 160g second, the comonomers of 3g first, 2g hydrogen peroxide, 124g water are mixed, are added dropwise sub-
Niter cake and sodium formaldehyde sulfoxylate mixed solution (2g sodium hydrogensulfites, 0.2g sodium formaldehyde sulfoxylates, 24g water), be added dropwise the comonomers of 20g first and
2g trifluoroethyl methacrylate mixed liquors, mercaptoethanol solution (0.55g mercaptoethanols, 24g water) is added dropwise, reaction temperature is normal
Temperature, time for adding 3.0h, 1h is incubated after being added dropwise, then adds 10g liquid caustic soda, produce low responsive type polycarboxylate water-reducer.
Embodiment 4
(1) it is esterified：127g methyl lactates, 215g methacrylic acids, 3.2g hydroquinones, 0.8g diphenylamines are added to four
In mouth flask, under nitrogen protection, 60 DEG C are warming up to, add 2.55g to p-methyl benzenesulfonic acid, be warming up to 120 DEG C, insulation reaction
2h, water during which is removed with logical method of the nitrogen with water, reaction is down to room temperature after terminating, obtains the first comonomer；
(2) sulfonation：500gHPEG and 35g sodium sulfites are mixed, under nitrogen protection, are warming up to 105 DEG C, insulation reaction
5h, reaction are cooled to 50 DEG C after terminating, add 10g liquid caustic soda, then near room temperature, obtains the second comonomer；
(3) it is copolymerized：The comonomers of 160g second, 2g hydrogen peroxide, 140g water are mixed, reaction temperature is 15 DEG C, disposably
Copperas solution (ferrous sulfate 0.047,5g water) is added, while disposable adds the 55% the first comonomer solution (24g the
One comonomer, 1.11g mercaptopropionic acids, 1g acrylic acid trifluoro ethyl esters, 1g trifluoroethyl methacrylates, 4.6g liquid caustic soda, 11g
Water), sodium formaldehyde sulfoxylate solution (0.45g sodium formaldehyde sulfoxylates, 20g water) is added dropwise, the 45% the first comonomer solution are added dropwise, and (24g first is copolymerized list
Body, 1.11g mercaptopropionic acids, 4.6g liquid caustic soda, 11g water), time for adding 1h, 1h is incubated after being added dropwise, then adds 5g liquid
Alkali, produce low responsive type polycarboxylate water-reducer.
Embodiment 5
(1) it is esterified：By 127g ethyl lactates, 216g acrylic acid, 129g methacrylic acid 2.7g hydroquinones, 0.8g fen thiophenes
Piperazine, 0.6g diphenylamines are added in four-hole boiling flask, under nitrogen protection, are warming up to 60 DEG C, are added 4.3g to p-methyl benzenesulfonic acid, are risen
During which temperature removes water, reaction is down to room temperature after terminating, obtains first to 115 DEG C, insulation reaction 2h with logical method of the nitrogen with water
Comonomer；
(2) sulfonation：500gVPEG and 35g sodium sulfites are mixed, under nitrogen protection, are warming up to 105 DEG C, insulation reaction
5h, reaction are cooled to 50 DEG C after terminating, add 10g liquid caustic soda, then near room temperature, obtains the second comonomer；
(3) it is copolymerized：By the comonomers of 160g second, 1.65g ammonium persulfates, 140g water mix, reaction temperature be 15 DEG C, one
Secondary property adds copperas solution (ferrous sulfate 0.058,5g water), while disposable adds the 55% the first comonomer solution
(comonomers of 20g first, 1.5g acrylic acid trifluoro ethyl esters, 1g 2- fluoroacrylic methyl esters, 0.45g mercaptopropionic acids, 0.6g isopropyls
Alcohol 4.6g liquid caustic soda, 11g water), sodium formaldehyde sulfoxylate solution (0.55g sodium formaldehyde sulfoxylates, 20g water) is added dropwise, the 45% the first comonomer solution are added dropwise
(comonomers of 20g first, 0.45g mercaptopropionic acids, 0.6g isopropanols, 4.6g liquid caustic soda, 11g water), time for adding 1h, is dripped
1h is incubated after finishing, 5g liquid caustic soda is then added, produces low responsive type polycarboxylate water-reducer.
Those of ordinary skill in the art understand, when technical scheme changes in following ranges, remain able to
To same as the previously described embodiments or similar technical scheme, protection scope of the present invention is still fallen within：
A kind of preparation method of low responsive type polycarboxylate water-reducer, comprises the following steps：
(1) it is esterified：Lactic acid or lactate, unsaturated acids, polymerization inhibitor and catalyst are mixed, leads to nitrogen protection, is warming up to
90~130 DEG C, 4~8h of insulation reaction, the method for logical nitrogen takes the water of reaction generation, wherein lactic acid or lactate and unsaturation out of
Sour mol ratio is 1: 1.5~5, and the dosage of polymerization inhibitor is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, is catalyzed
The dosage of agent is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, and reaction cools to normal temperature after terminating, and produces the
One comonomer；Above-mentioned lactate is methyl lactate or ethyl lactate；Above-mentioned unsaturated acids is acrylic acid and/or metering system
Acid；Above-mentioned catalyst is p-methyl benzenesulfonic acid and/or 98% concentrated sulfuric acid；
(2) sulfonation：The polyether macromonomer that molecular weight is 2100~2500 is mixed with sulfonating agent, leads to nitrogen protection, reaction
Temperature is 80~120 DEG C, soaking time 3-5h, and the mol ratio of polyether macromonomer and sulfonating agent is 1: 1~1.5, is added after cooling
Enter nertralizer and produce the second comonomer；
(3) it is copolymerized：By the second comonomer, the first comonomer, fluorochemical, oxidant, reducing agent, molecular regulation
Agent is reacted in water, and reaction temperature is 5~80 DEG C, and time for adding is 1.5~3h, and soaking time is 0.5~2h, must be copolymerized
Product, wherein the first comonomer is the 8~15% of the second comonomer quality, fluorochemical is the second comonomer quality
0.5~4%；Initiator is the 0.2~5% of the second comonomer quality, and reducing agent is the 0.05 of the second comonomer quality
~1%, molecular regulation agent be the second comonomer quality 0.3~1%, insulation terminate after by copolymerization product alkali adjust pH to
5~7, produce the low responsive type polycarboxylate water-reducer；Above-mentioned fluorochemical is acrylic acid trifluoro ethyl ester, methacrylic acid three
Fluorine ethyl ester, 2- fluoroacrylic methyl esters, 2- fluoropropenes acetoacetic ester and 2, at least one in 2,2- tri- fluoro- 2- perfluoroalkyl acrylates ethyl esters
Kind.
Preferably, the polymerization inhibitor is at least one of hydroquinones, phenthazine and diphenylamines.The polyether macromonomer
HPEG, TPEG or VPEG the type polyether macromonomer for being 2400 for molecular weight；The sulfonating agent is sulfamic acid, sulphite, halogen
For sulfonic acid or sulfur trioxide.The oxidant is at least one of hydrogen peroxide, ammonium persulfate and sodium peroxydisulfate.The reducing agent
For at least one of 2- hydroxyl -2- sulfinatoacetic acids disodium salt, sodium formaldehyde sulfoxylate, ferrous sulfate and sodium hydrogensulfite；The molecule
Conditioning agent is at least one of mercaptopropionic acid, mercaptoethanol, isopropanol and tertiary sodium phosphate.
The foregoing is only a preferred embodiment of the present invention, therefore can not limit the scope that the present invention is implemented according to this, i.e.,
The equivalent changes and modifications made according to the scope of the claims of the present invention and description, all should still it belong in the range of the present invention covers.
Claims (7)
- A kind of 1. preparation method of low responsive type polycarboxylate water-reducer, it is characterised in that：Comprise the following steps：(1) it is esterified：Lactic acid or lactate, unsaturated acids, polymerization inhibitor and catalyst are mixed, lead to nitrogen protection, it is warming up to 90~ 130 DEG C, 4~8h of insulation reaction, the method for logical nitrogen takes the water of reaction generation out of, and wherein lactic acid or lactate rubs with unsaturated acids You are than being 1: 1.5~5, and the dosage of polymerization inhibitor is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, catalyst Dosage is lactic acid or lactate and 0.3~3wt% of unsaturated acids total amount, and reaction cools to normal temperature after terminating, and it is common to produce first Polycondensation monomer；Above-mentioned lactate is methyl lactate or ethyl lactate；Above-mentioned unsaturated acids is acrylic acid and/or methacrylic acid；On It is p-methyl benzenesulfonic acid and/or 98% concentrated sulfuric acid to state catalyst；(2) sulfonation：The polyether macromonomer that molecular weight is 2100~2500 is mixed with sulfonating agent, leads to nitrogen protection, reaction temperature For 80~120 DEG C, soaking time 3-5h, the mol ratio of polyether macromonomer and sulfonating agent is 1: 1~1.5, in being added after cooling The second comonomer is produced with agent；(3) it is copolymerized：By the second comonomer, the first comonomer, fluorochemical, oxidant, reducing agent, molecular regulation agent in Reacted in water, reaction temperature is 5~80 DEG C, and time for adding is 1.5~3h, and soaking time is 0.5~2h, must be copolymerized production Thing, wherein the first comonomer is the 8~15% of the second comonomer quality, fluorochemical is the second comonomer quality 0.5~4%；Initiator be the second comonomer quality 0.2~5%, reducing agent for the second comonomer quality 0.05~ 1%, molecular regulation agent is the 0.3~1% of the second comonomer quality, is incubated after terminating copolymerization product alkali adjusting pH to 5 ~7, produce the low responsive type polycarboxylate water-reducer；Above-mentioned fluorochemical is acrylic acid trifluoro ethyl ester, methacrylic acid three Fluorine ethyl ester, 2- fluoroacrylic methyl esters, 2- fluoropropenes acetoacetic ester and 2, at least one in 2,2- tri- fluoro- 2- perfluoroalkyl acrylates ethyl esters Kind.
- 2. preparation method as claimed in claim 1, it is characterised in that：The polymerization inhibitor is hydroquinones, phenthazine and hexichol At least one of amine.
- 3. preparation method as claimed in claim 1, it is characterised in that：The polyether macromonomer is that molecular weight is 2400 HPEG, TPEG or VPEG type polyether macromonomer.
- 4. preparation method as claimed in claim 1, it is characterised in that：The sulfonating agent is sulfamic acid, sulphite, halo Sulfonic acid or sulfur trioxide.
- 5. preparation method as claimed in claim 1, it is characterised in that：The oxidant is hydrogen peroxide, ammonium persulfate and over cure At least one of sour sodium.
- 6. preparation method as claimed in claim 1, it is characterised in that：The reducing agent is 2- hydroxyl -2- sulfinatoacetic acids Disodium salt, sodium formaldehyde sulfoxylate, at least one of ferrous sulfate and sodium hydrogensulfite.
- 7. preparation method as claimed in claim 1, it is characterised in that：The molecular regulation agent be mercaptopropionic acid, mercaptoethanol, At least one of isopropanol and tertiary sodium phosphate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108517026A (en) * | 2018-03-29 | 2018-09-11 | 福建三凯建筑材料有限公司 | A kind of polycarboxylate water-reducer |
| CN108864374A (en) * | 2018-06-01 | 2018-11-23 | 科之杰新材料集团有限公司 | A kind of preparation method of the high water-retaining type polycarboxylate water-reducer of ethers |
| CN108864375A (en) * | 2018-06-01 | 2018-11-23 | 科之杰新材料集团有限公司 | A kind of preparation method being retained anti-chamotte mould polycarboxylate water-reducer |
| CN109021180A (en) * | 2018-08-16 | 2018-12-18 | 科之杰新材料集团有限公司 | A kind of muting sensitive sense shrinkage type polycarboxylate water-reducer and preparation method thereof |
| CN109626856A (en) * | 2018-12-24 | 2019-04-16 | 科之杰新材料集团有限公司 | A kind of preparation method of block dispersing type concrete admixture |
| CN109824294A (en) * | 2019-03-25 | 2019-05-31 | 科之杰新材料集团有限公司 | A kind of high-strength stable type liquid accelerator and preparation method thereof |
| CN110903056A (en) * | 2018-09-18 | 2020-03-24 | 武汉源锦商品混凝土有限公司 | High-strength self-compacting fair-faced concrete and preparation method thereof |
| CN115043989A (en) * | 2022-06-20 | 2022-09-13 | 海南大学 | Low-air-entraining type polycarboxylate superplasticizer applicable to fair-faced concrete and one-step synthesis method thereof |
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| CN109824294A (en) * | 2019-03-25 | 2019-05-31 | 科之杰新材料集团有限公司 | A kind of high-strength stable type liquid accelerator and preparation method thereof |
| CN109824294B (en) * | 2019-03-25 | 2021-08-17 | 科之杰新材料集团有限公司 | High-strength stable liquid accelerator and preparation method thereof |
| CN115043989A (en) * | 2022-06-20 | 2022-09-13 | 海南大学 | Low-air-entraining type polycarboxylate superplasticizer applicable to fair-faced concrete and one-step synthesis method thereof |
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