CN105461866B - A kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof - Google Patents
A kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of water reducer, more particularly to a kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof.It is by the isoamyl alcohol polyoxyethylene ether monomer b that 80%~92% relative molecular mass M is 600~5000, and after 6%~13% glycol ester monomer c dissolve at 10 DEG C 60 DEG C, input oxidant；Then keep this temperature and uniformly dropwise addition reducing agent, the derivatives monomer a of chain-transferring agent and 7%~16% unsaturated acids or unsaturated acids are copolymerized simultaneously in 3~3.5h, and with pH value conditioning agent adjust PH to 6.8 after obtain copolymer reactant, wherein, the weight sum of a, b, c monomer is 1.Viscosity reduction type polycarboxylate water-reducer of the present invention can effectively reduce the slurry viscosity of low water binder ratio strong concrete, and just have the effect kept for a long time to the slump and fluidity of concrete without being used in combination with high collapse protection type polycarboxylate water-reducer.
Description
【Technical field】
The present invention relates to a kind of water reducer, more particularly to a kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof.
【Background technology】
With the continuous development in city, building site day is becoming tight, and to improve the utilization rate in soil, is built in the city in future
Will be more and more using high-rise or high-rise building in if.
In order to ensure high-rise or high-rise building amount of substance, while increase its inner space, when pouring all using high-strength
Concrete is constructed.And it is such building it is often complicated, cloth muscle is intensive, thus to fresh concrete require it is high, not only
Good workability is needed, and needs good mobile performance and self-compacting ability.At present using domestic existing poly-
It is mainly the components such as composite thickening, viscosity reduction that carboxylic acid water reducer, which prepares high-strength concrete, but only solves problem pole by compounding means
Its is limited, and effect is also undesirable, and fresh concrete is also taken off bottom with isolation and showed because viscosity large fluidity can be poor
As so that can not smooth construction；Although can reach ideal effect using external import polycarboxylate water-reducer, its price is held high
It is expensive, cost is added, more important is its technical know-how, is unfavorable for the development of China's technology.
Patent publication No is that CN102936112A patent describes a kind of poly- carboxylic suitable for High-strength self-compaction concrete
Sour water reducer and preparation method thereof.The water reducer mainly with isopentene group APEO, binary unsaturated carboxylic acid and its spreads out
Biology, unitary unsaturated carboxylic acid and its derivative are copolymerized and obtained in 60~80 DEG C of aqueous solution.Its innovation is to introduce
4th monomer, hydroxyl and sulfonic reaction promoter, make the product of synthesis have higher dispersive property.As for high-strength
The polycarboxylate water-reducer of concrete, although this product can reduce the viscosity of concrete, the slump and fluidity keep energy
Power is limited, need to be used in combination with high collapse protection type polycarboxylate water-reducer, so just have impact on its viscosity reducing effect and cost is also higher；Together
When this production when require heat to 60~80 DEG C of temperature, be unfavorable for energy-saving and emission-reduction.
Patent publication No is that CN103553413A patent describes a kind of Viscosity-control type polycarboxylate water-reducer and its preparation side
Method.The water reducer mainly with unsaturated acrylic monomer, unsaturated polyoxyethylene monomer and adjusts allonge body (predominantly unsaturated alkane
Base ester, fluorinated ester, alkyl acrylamide or its mixture) it is copolymerized and obtains in 70~90 DEG C of the aqueous solution.The water reducer is effective
Ground reduces the plastic viscosity of cement paste, but needs also exist for high temperature in process of production, and energy consumption is larger；Most importantly adjust
Allonge body first need to be dissolved in aqueous surfactant solution, then participates in polymerisation, but these surface-actives in end product
Agent can not remove.High performance water reducing agent of polyocarboxy acid originally belongs to air-entraining water-reducing agent, and surfactant is equal to varying degrees
With air-entraining function, therefore to be likely to result in high-strength concrete air content in application bigger than normal for the product obtained by this method,
Its intensity is set not ensure.
Patent publication No is that CN102643042A patent describes a kind of cross-linking type polycarboxylate water-reducer.The water reducer is
With methyl allyl alcohol polyoxyethylene ether, polyethylene glycol dimethacrylate, methylpropene sodium sulfonate and acrylic acid 60~62
DEG C the aqueous solution in be copolymerized and obtain.The water reducer utilizes it mainly using polyethylene glycol dimethacrylate as crosslinking agent
Ester bond hydrolyzed under alkaline environment discharge polycarboxylic acids molecule principle play the slump holding effect.But in practical application
When the high-strength concrete of low water binder ratio, its effect subtracts with the polycarboxylic acids using polyethylene glycol monomethyl ethermethacrylic acid esters as side chain
Aqua is similar, and can not hydrolyze well, and the slump and fluidity are kept；Simultaneously because methacrylic polyoxyethylene
The slump holding capacity of ether is also limited, therefore the product also can not really meet that needs have the high-strength mixed of superior fluidity energy
Solidifying soil requires；And raw material double bond activity and due to triggering system, required temperature is also higher during polymerisation, Wu Fashi
Existing low-temperature energy-saving.
【The content of the invention】
To solve high energy consumption in existing viscosity reduction type polycarboxylate water-reducer production, using effect is undesirable, and product stability is difficult
With the technical problem of guarantee, the present invention provides a kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof.
The scheme that the present invention solves technical problem is to provide a kind of viscosity reduction type polycarboxylate water-reducer, and it is by 80%~92% phase
To the isoamyl alcohol polyoxyethylene ether monomer b that molecular mass M is 600~5000, and 6%~13% glycol ester monomer c is in 10
After being dissolved at DEG C -60 DEG C, oxidant is put into；Then keep this temperature and reducing agent, chain turn is uniformly added dropwise simultaneously in 3~3.5h
Move agent and the derivatives monomer a of 7%~16% unsaturated acids or unsaturated acids is copolymerized, drip rear insulation reaction
1h, it is 40% to be then diluted with water solid content, and obtains copolymer reactant after adjusting PH to 6.8 with pH value conditioning agent, wherein,
A, the percentage by weight sum of b, c monomer is 1；
The formula of the monomer a is as follows：
Wherein：R1 is-H ,-COOH or-COOCH3One or more in three kinds of groups, R2 are-H or-CH3；
Monomer b chemical structural formula is as follows：
Wherein：N is the average addition molal quantity of oxirane chain link, and its value is 10~120；
Monomer c formula is as follows：
Wherein：R3, R4 are selected from-HC=CH2OrOr
Preferably, the relative molecular mass M of the monomer b is 1200-2000.
Preferably, n is 10-80 in the formula of the monomer b.
Preferably, n is 25~45 in the formula of the monomer b.
Preferably, oxidant includes over cure acid ion, hydrogen peroxide in the redox system, and reducing agent includes sulfurous
Sour hydrogen radical ion, vitamin C, sodium formaldehyde sulfoxylate, ferrous sulfate ion, wherein oxidant are added to reactant mixture and account for added monomer
The 0.4%~1.8% of gross mass, reducing agent are added to 0.1%~1.0% that reactant mixture accounts for added monomer gross mass.
Preferably, the redox system is sodium peroxydisulfate and sodium hydrogensulfite, ammonium persulfate and sodium hydrogensulfite, mistake
Ammonium sulfate and vitamin C, hydrogen peroxide and vitamin C, hydrogen peroxide and sodium formaldehyde sulfoxylate, hydrogen peroxide and iron ammonium sulfate any one or
It is combined.
Preferably, the chain-transferring agent is TGA, mercaptoethanol, methylpropene sodium sulfonate or n-dodecyl mercaptan
In one kind or its above-mentioned substance mixture；The whole transfer agents added in reactant mixture account for added monomer gross mass
0.2%~1.3%.
Preferably, the pH value conditioning agent is the tablet or the aqueous solution of sodium hydroxide or potassium hydroxide.
Another technical scheme that the present invention solves the above problems is to provide a kind of viscosity reduction type polycarboxylic acids for possessing features described above
The preparation method of water reducer, it is characterised in that：Comprise the following steps：It is being configured with the glass of agitator, thermometer, Dropping feeder
In reactor, deionized water, isoamyl alcohol polyoxyethylene ether monomer b and glycol ester monomer c are added, is heated while stirring, protected
Hold system temperature and maintain 10 DEG C -60 DEG C, after material dissolution, put into oxidant；Then this temperature is kept and in 3~3.5h
Reducing agent, chain-transferring agent and monomer a mixed solution are uniformly added dropwise simultaneously；Rear insulation reaction 1h is dripped, is then diluted with water
It is 40% to solid content, then pH value is neutralized to as 6.8 with pH value conditioning agent.
Compared with prior art, viscosity reduction type polycarboxylate water-reducer of the present invention can effectively reduce low water binder ratio high intensity and mix
The slurry viscosity of soil is coagulated, it is met construction requirement.And just have without being used in combination with high collapse protection type polycarboxylate water-reducer
The effect that the slump and fluidity to concrete are kept for a long time, reach the purpose of concrete long-distance transportation.In addition, this hair
Type polycarboxylate water-reducer is glued in publicly price-reduction to be synthesized under low temperature or normal temperature state, save energy consumption, economic and environment-friendly.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
In the embodiment of the present invention, if without other explanation, mentioned concentration is the letter of mass percent concentration
Claim.Synthesized viscosity reduction type polycarboxylate water-reducer is designated as A in all embodiments, and existing water reducer is designated as B in comparative example.
Embodiment 1
In the glass reactor for being configured with agitator, thermometer, Dropping feeder, 160g deionized waters, 48.34g are added
Glycol diacrylate and the isoamyl alcohol polyoxyethylene ether monomer that 320.5g molecular weight M is 1800, heat, protect while stirring
Hold whole system temperature and maintain 20 DEG C, treat material dissolution, put into 1.92g30% hydrogen peroxide；Then keep this temperature and 3~
Be added dropwise in 3.5h while uniformly the solution mixed by 0.61g vitamin Cs, 1.91g TGAs with 80g deionized waters and by
The solution that 31.2g acrylic acid mixes with 120g deionized waters；Keep 20 DEG C to continue to react 1h after dripping, be then diluted with water
Solid content is 40%, then it is 6.8 to be neutralized to pH value with pH value conditioning agent, that is, obtains product, be designated as A-1.
The pH value conditioning agent is alkaline matter, is included but is not limited to：The tablet or water-soluble of sodium hydroxide, potassium hydroxide
Liquid.In the present embodiment, pH value conditioning agent uses sodium hydroxide solution.
Embodiment 2
In the glass reactor for being configured with agitator, thermometer, Dropping feeder, 155g deionized waters, 12.11g are added
Maleic acid, 51.21g ethylene glycol acrylates maleate, the isoamyl alcohol polyoxyethylene ether list that 138.4g molecular weight M is 1200
Body and the isoamyl alcohol polyoxyethylene ether monomer that 173g molecular weight M is 1800, warming while stirring, temperature are put into after rising to 40 DEG C
2.82g sodium hydrogensulfite；Then keep this temperature and be uniformly added dropwise simultaneously by 6.45g ammonium persulfates and 105g in 3~3.5h
The solution of deionized water mixing and mixed by 25.26g acrylic acid, 4.70g methylpropene sodium sulfonates with 125g deionized waters molten
Liquid；40 DEG C are kept to continue to react 1h after dripping, it is 40% to be then diluted with water solid content, then is neutralized to pH value conditioning agent
PH value is 6.8, that is, obtains product, is designated as A-2.
In the present embodiment, pH value conditioning agent uses potassium hydroxide solution.
Embodiment 3
In the glass reactor for being configured with agitator, thermometer, Dropping feeder, 160g deionized waters, 50.23g are added
Ethylene glycol dimethacrylate and the isoamyl alcohol polyoxyethylene ether monomer that 314g molecular weight M is 2000, warming while stirring,
Temperature rises to 50 DEG C, rear to put into 2.32g30% hydrogen peroxide；Then keep this temperature and in 3~3.5h simultaneously uniformly be added dropwise by
Solution that 0.65g vitamin Cs, 0.40g iron ammonium sulfates, 1.47g mercaptoethanols mix with 105g deionized waters and by 21.45g
The solution that acrylic acid, 14.39g methacrylic acids mix with 130g deionized waters；50 DEG C are kept to continue to react 1h after dripping, so
After be diluted with water solid content as 40%, then be neutralized to pH value as 6.8 with pH value conditioning agent, that is, obtain product, be designated as A-3.
In the present embodiment, pH value conditioning agent uses sodium hydroxide solution.
Embodiment 4
In the glass reactor for being configured with agitator, thermometer, Dropping feeder, 156g deionized waters, 27.75g are added
Maleic acid, 47.08g glycol diacrylates and 312.2g molecular weight M be 1800 isoamyl alcohol polyoxyethylene ether monomer, side
Side heating is stirred, keeps whole system temperature to maintain 25 DEG C, treats material dissolution, puts into 2.30g30% hydrogen peroxide；Then keep
This temperature and in 3~3.5h simultaneously uniformly be added dropwise mixed by 0.62g vitamin Cs, 1.90g TGAs with 80g deionized waters
Solution and the solution that is mixed by 13.00g acrylic acid with 87g deionized waters；25 DEG C are kept to continue to react 1h after dripping, then
It is 40% to be diluted with water solid content, then it is 6.8 to be neutralized to pH value with pH value conditioning agent, that is, obtains product, be designated as A-4.
In the present embodiment, pH value conditioning agent uses sodium hydroxide solution.
Above-described embodiment 1 is into embodiment 4, reaction temperature any temperature, preferably 20 between caning be controlled in 10 DEG C -60 DEG C
DEG C, 25 DEG C, 40 DEG C, 50 DEG C, acrylic acid, maleic acid, methacrylic acid are unsaturated acid monomer a, its formula
It is represented by：
Wherein：R1 is-H ,-COOH or-COOCH3One or more in three kinds of groups, R2 are-H or-CH3；Therefore at it
In his embodiment, it can also be methyl-maleic acid, can also be the derivative such as monomethyl maleate of unsaturated acids,
It can also be the mixing of above-mentioned substance.
Isoamyl alcohol polyoxyethylene ether is monomer b, and its relative molecular mass M is 600-5000, preferably 400-3650, more
Excellent is 1200-2000, and its degree of polymerization is 10-120, preferably 10-80, and more excellent is 25-45.Its formula is represented by：
Wherein n is the degree of polymerization.
Glycol diacrylate, ethylene glycol dimethacrylate or ethylene glycol acrylate maleate are ethylene glycol
Ester monomer c, its formula are represented by：
Wherein：R3, R4 are selected from-HC=CH2OrOr
Therefore, in other embodiments, its mixing that can also be ethylene glycol dimaleate or above-mentioned substance.
With the derivatives monomer a of unsaturated acids or unsaturated acids, isoamyl alcohol polyoxyethylene ether monomer b, glycol ester list
Body c gross mass is counted for 1, and the derivatives monomer a of unsaturated acids or unsaturated acids accounts for 7%-16%, isoamyl alcohol polyoxyethylene ether
Monomer b accounts for 80%-92%, and glycol ester monomer c accounts for 6%-13%.
TGA, mercaptoethanol are the chain-transferring agent of reaction, and in other embodiments, chain-transferring agent can also be first
The mixing of base sodium allylsulfonate, n-dodecyl mercaptan or above-mentioned substance, and the whole transfer agents added in reactant mixture account for
The 0.2%~1.3% of added monomer gross mass.
Hydrogen peroxide and dioxygen in ammonium persulfate in vitamin C, embodiment 2 and sodium hydrogensulfite, embodiment 3 in embodiment 1
Water forms the redox system in respective embodiment, the oxygen with hydrogen peroxide in iron ammonium sulfate, embodiment 4 with vitamin C
Change oxidant in reduction system and include but is not limited to over cure acid ion, hydrogen peroxide, reducing agent includes but is not limited to bisulfite
Radical ion, vitamin C, sodium formaldehyde sulfoxylate, ferrous sulfate ion.Wherein oxidant is added to reactant mixture and accounts for the total matter of added monomer
The 0.4%~1.8% of amount, reducing agent is added to 0.1%~1.0% that reactant mixture accounts for added monomer gross mass.
Comparative example 1
In the glass reactor for being configured with agitator, thermometer, Dropping feeder, 180g deionized waters and 360g points are added
The isoamyl alcohol polyoxyethylene ether monomer that son amount M is 2000, warming while stirring, temperature rise to 50 DEG C, put into 2.66g30% afterwards
Hydrogen peroxide；Then keep this temperature and in 3~3.5h simultaneously uniformly be added dropwise by 0.74g vitamin Cs, 0.46g iron ammonium sulfates,
The solution and gone by 24.6g acrylic acid, 16.5g methacrylic acids and 100g that 1.68g mercaptoethanols mix with 120g deionized waters
The solution of ionized water mixing；50 DEG C are kept to continue to react 1h after dripping, it is 40% to be then diluted with water solid content, then uses hydrogen
It is 6.8 that sodium oxide molybdena, which is neutralized to pH value, that is, obtains product, be set to B-1.
Comparative example 2
Comparative example 2 is the polycarboxylate water-reducer B-2 synthesized by polymeric monomer of isoamyl dilute alcohol APEO that market is sold.
Implementation result compares：
Will as made from the inventive method polycarboxylate water-reducer A-1, A-2, A-3, A-4, while relatively had now
Poly carboxylic acid series water reducer (B-1, B-2), carry out cement paste experiment and C80 concrete tests.Wherein cement paste experiment reference
GB/T8077-2012《Methods for testing uniformity of concrete admixture》Standard survey its initial paste flowing degree, 1h paste flowing degrees,
2h paste flowing degrees and with reference to GB/T10274-2008《Viscosity Measurement Methods》Measure the viscosity of cement paste；Concrete test is joined
According to GB8076-2008《Concrete admixture》The first slump, divergence degree and the 2h of canonical measure low water binder ratio high-strength concrete
The slump, divergence afterwards, and measure its slump bucket and flow backwards the time, and with reference to GB/T50081-2002《Normal concrete power
Learn method for testing performance standard》Relevant regulations measurement maturing compression strength.Testing cement is the small wild field of starfish
P.O42.5R cement, C80 concrete mixs are shown in Table 1, cement paste result of the test and concrete test result be shown in Table respectively 2 with
Table 3.
The C80 concrete mixs of table 1
| C | FA | K | Si | S | G | W | Ad |
| 360 | 80 | 80 | 40 | 630 | 1120 | 140 | 12.32 |
The cement paste result of the test of table 2
The concrete test result of table 3
From table 2, the viscosity reduction type polycarboxylate water-reducer according to obtained by the present invention, cement slurry can be effectively reduced
Viscosity, and paste flowing degree retention property is good；From table 3 it can also be seen that the viscosity reduction type polycarboxylic acids obtained by the application present invention subtracts
The high-strength concrete slump that aqua makes, expansion ratio retention property are good, and it is short to flow backwards the time, good flowing properties, energy
Enough meet engineering demand.
Compared with prior art, viscosity reduction type polycarboxylate water-reducer of the present invention can effectively reduce the high-strength coagulation of low water binder ratio
The slurry viscosity of soil, makes it meet construction requirement.And without with high collapse protection type polycarboxylate water-reducer be used in combination just have pair
The effect that the slump and fluidity of concrete are kept for a long time, reach the purpose of concrete long-distance transportation.It is in addition, of the invention
Viscosity reduction type polycarboxylate water-reducer can be synthesized under low temperature or normal temperature state, save energy consumption, economic and environment-friendly.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all originals in the present invention
Any modification made within then, equivalent substitution and improvement etc. all should be included within protection scope of the present invention.
Claims (9)
- A kind of 1. viscosity reduction type polycarboxylate water-reducer, it is characterised in that：It by 80%~92% relative molecular mass M be 600~ 5000 isoamyl alcohol polyoxyethylene ether monomer b, and after 6%~13% glycol ester monomer c dissolves at 10 DEG C -60 DEG C, throw Enter oxidant；Then keep this temperature and reducing agent, chain-transferring agent and 7%~16% uniformly is added dropwise not simultaneously in 3~3.5h The derivatives monomer a of saturated acid or unsaturated acids is copolymerized, and drips rear insulation reaction 1h, is then diluted with water solid Content is 40%, and obtains copolymer reactant after adjusting PH to 6.8 with pH value conditioning agent, wherein, the weight percent of a, b, c monomer It is 1 than sum；The formula of the monomer a is as follows：Wherein：R1 is-H ,-COOH or-COOCH3One or more in three kinds of groups, R2 are-H or-CH3；Monomer b chemical structural formula is as follows：Wherein：N is the average addition molal quantity of oxirane chain link, and its value is 10~120；Monomer c formula is as follows：Wherein：R3, R4 are selected from-HC=CH2Or
- 2. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：The relative molecular mass M of the monomer b is 1200-2000。
- 3. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：N is 10-80 in the formula of the monomer b.
- 4. viscosity reduction type polycarboxylate water-reducer as claimed in claim 3, it is characterised in that：In the formula of the monomer b n be 25~ 45。
- 5. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：Oxidant bag in the redox system Over cure acid ion, hydrogen peroxide are included, reducing agent includes sulfurous acid hydrogen radical ion, vitamin C, sodium formaldehyde sulfoxylate, ferrous sulfate ion, its Middle oxidant is added to 0.4%~1.8% that reactant mixture accounts for added monomer gross mass, and reducing agent is added to reaction mixing Thing accounts for the 0.1%~1.0% of added monomer gross mass.
- 6. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：The redox system is sodium peroxydisulfate With sodium hydrogensulfite, ammonium persulfate and sodium hydrogensulfite, ammonium persulfate and vitamin C, hydrogen peroxide and vitamin C, hydrogen peroxide with Any one or more of sodium formaldehyde sulfoxylate, hydrogen peroxide and iron ammonium sulfate combine.
- 7. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：The chain-transferring agent is TGA, mercapto The mixture of one kind or its above-mentioned substance in base ethanol, methylpropene sodium sulfonate or n-dodecyl mercaptan；It is mixed to add reaction Whole chain-transferring agents in compound account for the 0.2%~1.3% of added monomer gross mass.
- 8. viscosity reduction type polycarboxylate water-reducer as claimed in claim 1, it is characterised in that：The pH value conditioning agent be sodium hydroxide or The tablet or the aqueous solution of potassium hydroxide.
- A kind of 9. preparation method of viscosity reduction type polycarboxylate water-reducer as described in claim any one of 1-8, it is characterised in that：Bag Include following steps：In the glass reactor for being configured with agitator, thermometer, Dropping feeder, deionized water, prenol are added Polyoxyethylene ether monomer b and glycol ester monomer c, is heated while stirring, is kept system temperature to maintain 10 DEG C -60 DEG C, is treated thing After material dissolving, oxidant is put into；Then keep this temperature and in 3~3.5h simultaneously uniformly be added dropwise reducing agent, chain-transferring agent with Monomer a mixed solution；Rear insulation reaction 1h is dripped, is then diluted with water solid content as 40%, then with pH value conditioning agent PH value is neutralized to as 6.8.
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| CN106467604A (en) * | 2016-10-14 | 2017-03-01 | 科之杰新材料集团有限公司 | A kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof |
| CN106967200A (en) * | 2017-03-31 | 2017-07-21 | 刘翠芬 | It is a kind of to have poly carboxylic acid series water reducer that guarantor is collapsed with viscosity-reducing performance and preparation method thereof concurrently |
| CN109053974B (en) * | 2018-07-23 | 2020-11-13 | 中铁四局集团有限公司 | Preparation method of viscosity-reducing polycarboxylate superplasticizer |
| CN109721722B (en) * | 2018-12-25 | 2021-10-29 | 广东红墙新材料股份有限公司 | Viscosity-reducing type polycarboxylate superplasticizer containing double viscosity-reducing functional groups, and preparation method and application thereof |
| CN112608479B (en) * | 2019-11-14 | 2022-04-15 | 科之杰新材料集团(贵州)有限公司 | Low-viscosity modifier |
| CN110790872B (en) * | 2019-11-27 | 2022-08-05 | 中建西部建设股份有限公司 | Viscosity-reducing polycarboxylate superplasticizer with micro-crosslinking structure and preparation method thereof |
| CN113968692B (en) * | 2021-12-03 | 2022-08-09 | 陕西世纪博远建材有限公司 | High-strength concrete viscosity-reducing polycarboxylate superplasticizer and preparation method thereof |
| CN114057956A (en) * | 2021-12-07 | 2022-02-18 | 中建西部建设新材料科技有限公司 | Water-reducing slump-retaining comprehensive polycarboxylic acid water reducer and preparation method thereof |
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| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
| CN103011666A (en) * | 2012-11-30 | 2013-04-03 | 太原理工大学 | Polycarboxylate-type cement water-reducing agent and preparation method thereof |
| CN103275280A (en) * | 2013-06-17 | 2013-09-04 | 武汉东彭科技发展有限公司 | Synthetic method for polycarboxylate type high slump-retaining water reducing agent at normal temperature |
| CN103804609A (en) * | 2014-01-21 | 2014-05-21 | 北京奥润开元环保科技研究院有限公司 | Polycarboxylic acid water reducer with reticular structure and preparation method thereof |
| CN103865007A (en) * | 2014-03-17 | 2014-06-18 | 南京瑞迪高新技术有限公司 | Preparation method of viscosity-reduction type polycarboxylate water reducer |
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