CN105271905B - Slump retention agent and preparation method thereof - Google Patents
Slump retention agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of slump retention agent and preparation method thereof, is related to concrete admixture field, solves the problems, such as that slump retention agent raw material sources are limited.The raw material of the slump retention agent of the present invention is made up of the component of following weight/mass percentage composition：Polyethers 40% 45%, initiator 0.2% 0.5%, chain-transferring agent 0.1% 0.24%, reducing agent 0.1% 0.2%, minor comonomer 2% 5%, water 48.06% 58.7%, alkali 0.5% 1.0%；Wherein, the polyethers is methacrylic ethylene polyethenoxy ether, or the polyethers is methacrylic ethylene polyethenoxy ether and methyl allyl polyoxyethylene ether and/or the mixture of methyl butene base APEO.The optional scope of slump retention agent raw material of the present invention is more and excellent performance.
Description
Technical field
The present invention relates to concrete admixture field, more particularly to a kind of slump retention agent and preparation method thereof.
Background technology
Concrete is widely used in various fields as a kind of construction material, with the development of concrete also promote it is mixed
The technology for coagulating native additive develops rapidly, and concrete admixture is a kind of component essential in concrete, autochthonal in coagulation
Central role is played in production technology, decides the quality of concrete.Wherein, water reducer is as a kind of important concrete admixture
The workability of concrete can be effectively improved, improves the intensity of concrete.In numerous water reducers, polycarboxylate water-reducer is as
Three generations's water reducer, has that water-reducing rate is high, and volume is few, environmental protection and the ability for keeping concrete slump, fast with China's economy
Speed development and the raising at full speed of building level, high performance water reducing agent of polyocarboxy acid have become use by a series of its outstanding properties
Measure maximum additive.But in face of factors such as sand clay content is higher, content of stone powder is higher, cement constituent change, temperature changes, gather
Still inevitably there is function of slump protection deficiency, loses too fast phenomenon in actual applications in carboxylic acid high-performance water reducing agent, this
Phenomenon is to restrict the technical bottleneck of new concrete construction and long-distance transportation.In recent years, slump retaining agent turned into domestic new research
Focus is simultaneously widely used in concrete.
With the extensive use of slump retention agent, its usage amount increasingly increases, and the synthesis of existing slump retention agent is former
Material generally comprises polyethers, initiator, chain-transferring agent, reducing agent, minor comonomer and water, wherein, polyethers often selects polyethyleneglycol
Methyl ether, allyl polyethenoxy ether, methyl allyl polyoxyethylene ether and one kind in methyl butene base APEO or
Two kinds and more than；Existing slump retention agent raw material sources are limited, and the composition because of concrete, preparation technology and construction ring
The difference in border, slump retention agent is very different to the function of slump protection of concrete and then have impact on the workability of concrete；It is existing
Some slump retention agents can not meet actual use demand, therefore ensure that slump retention agent has the same of excellent properties
When need to develop more slump retention agent raw materials.
The content of the invention
In view of this, the embodiments of the invention provide a kind of slump retention agent and preparation method thereof, main purpose is to expand
The raw material sources of high slump retention agent.
To reach above-mentioned purpose, invention broadly provides following technical scheme：
On the one hand, the invention provides a kind of slump retention agent, its raw material by following weight/mass percentage composition component group
Into：
Wherein, the polyethers is methacrylic ethylene polyethenoxy ether, or the polyethers is methacrylic second two
Alcohol APEO and methyl allyl polyoxyethylene ether and/or the mixture of methyl butene base APEO.
Preferably, the polyethers is methacrylic ethylene polyethenoxy ether and methyl allyl polyoxyethylene ether
And/or methyl butene base APEO mixture when, the methacrylic ethylene polyethenoxy ether accounts for the mixing
The mass percent of thing is 1%-90%.
Preferably, the initiator is ammonium persulfate, sodium peroxydisulfate or hydrogen peroxide；The chain-transferring agent is sulfydryl second
Acid or mercaptopropionic acid.
Preferably, the reducing agent is ascorbic acid, sodium sulfite or sodium hydrogensulfite；The alkali is hydroxide flake
Sodium.
Preferably, the minor comonomer is selected from following acrylic acid, methacrylic acid, hydroxy-ethyl acrylate, methacrylic acid
Hydroxyl ethyl ester, hydroxypropyl acrylate, hydroxy propyl methacrylate, hy-droxybutyl, methacrylate, metering system sulphur
At least one of sour sodium and itaconic acid.
Preferably, the solid content of the slump retention agent is 40%-52%, pH value 5-7.
On the other hand, the invention provides the preparation method of above-mentioned slump retention agent, comprise the following steps：
Raw material is weighed in proportion, and initiator is added to the polyethers that polyethers is 54 DEG C -56 DEG C with the temperature that water is mixed to get
In solution, the first reactant is obtained, the mixing agent solution that chain-transferring agent, reducing agent and water are mixed to get is added drop-wise to described first
In reactant, the mixing agent solution, which is added drop-wise in first reactant, needs 1.5 ± 0.25 hours, and the intermixture is added dropwise
While solution, the minor comonomer solution that minor comonomer and water are mixed to get is added drop-wise in first reactant, the minor comonomer
Solution, which is added drop-wise in first reactant, needs 1.0 ± 0.25 hours, and the second reactant is obtained after completion of dropwise addition；Described in control
For the temperature of second reactant at 58 DEG C -62 DEG C, reaction obtains the 3rd reactant after 1.5 hours, the alkali that alkali and water are mixed to get
Remaining water is added in the 3rd reactant in solution and raw material, and products therefrom is that the slump is kept after reacting 0.5 hour
Agent.
Preferably, the mass percentage concentration of the minor comonomer solution is 60%-80%, the quality hundred of the polyether solutions
Point concentration be 60%-70%, and the mass percentage concentration for mixing agent solution is 1%-3%, the quality percentage of the aqueous slkali
Concentration is 30%-40%.
Preferably, when the initiator is added dropwise, when the temperature of the polyether solutions is less than 54 DEG C, using electrical bar or
Solar energy heating is to 54 DEG C -56 DEG C；When the temperature of second reactant is less than 58 DEG C, using electrical bar or solar energy heating extremely
58℃-62℃。
Preferably, the time for adding that the mixing agent solution is added dropwise in first reactant is 1.5 hours；It is described
The time for adding that minor comonomer solution is added dropwise in first reactant is 1 hour.
Compared with prior art, the beneficial effects of the invention are as follows：
The problem of present invention increasingly increases for the dosage of slump retention agent, and raw material sources are limited, uses with methyl alkene
Synthesis material of the propyl glycol APEO as slump retention agent, according to methacrylic ethylene polyethenoxy ether
Introducing and slump retention agent performance requirement, adjust slump retention agent synthesis material in each component material proportioning close
System, optimize the technological means of slump retention agent preparation technology, reach the raw material sources for expanding slump retention agent, and collapse
The excellent technical purpose of the function of slump protection of degree of falling retention agent.
Embodiment
Be further illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below with compared with
Good embodiment, to embodiment, technical scheme, feature and its effect according to the present patent application, describe in detail as after.Under
State it is bright in multiple embodiments in special characteristic, structure or feature can be combined by any suitable form.
Embodiment 1
Each raw material components are as follows in parts by mass：160 parts of methacrylic ethylene polyethenoxy ethers, 1440 parts of methyl alkene
Propyl group APEO, 8 parts of ammonium persulfates, 4 parts of TGAs, 4 parts of ascorbic acid, 80 parts of acrylic acid, 20 parts of sodium hydroxides,
2284 parts of water；
By above-mentioned 160 parts of methacrylic ethylene polyethenoxy ethers, above-mentioned 1440 parts of methyl allyl polyoxyethylene ethers
Put into 1067 parts of water in reaction unit, open agitating and heating equipment and reactant is heated to 54 DEG C, temperature is stopped after reaching 54 DEG C
Only heat, the polyether solutions that mass percentage concentration is 60% are fully obtained after dissolving, above-mentioned 4 parts of TGAs, above-mentioned 4 parts are resisted
Bad hematic acid and 792 parts of water mixing, stir, the mixing agent solution that mass percentage concentration is 1% are obtained, by above-mentioned 80 parts of propylene
Acid and 53 parts of water are mixed to get the minor comonomer solution that mass percentage concentration is 60%, and above-mentioned 20 parts of sodium hydroxides and 47 parts of water are mixed
Close the aqueous slkali that obtained mass percentage concentration is 30%；
Above-mentioned 8 parts of ammonium persulfates are added in the polyether solutions that above-mentioned mass percentage concentration is 60%, stir, obtain
To the first reactant, the mixing agent solution that above-mentioned mass percentage concentration is 1% is added dropwise in above-mentioned first reactant, above-mentioned matter
The time for adding for measuring the mixing agent solution that percentage concentration is 1% is 1.25 hours, is 1% above-mentioned mass percentage concentration is added dropwise
Mixing agent solution while, by above-mentioned mass percentage concentration be 60% minor comonomer solution be added dropwise to above-mentioned first reactant
In, the time for adding for the minor comonomer solution that above-mentioned mass percentage concentration is 60% is 0.75 hour, and is obtained after completion of dropwise addition
Two reactants；Wherein, in order that reaction is more abundant, reaction product performance is more preferable, and above-mentioned mass percentage concentration is 60% small list
The dropwise addition process of liquid solution must be fulfiled ahead of schedule than the dropwise addition process for the mixing agent solution that above-mentioned mass percentage concentration is 1%；
Heat is provided for reactant using reaction heat, reaction temperature is 55 DEG C, using electrical bar to above-mentioned second reactant
Heating, control reactant obtain the 3rd reactant, are 30% by above-mentioned mass percentage concentration in 58 DEG C of isothermal reactions 1.5 hours
Aqueous slkali and raw material in remaining water be added in the 3rd reactant, reaction 0.5 hour after products therefrom be the slump
Retention agent；The solid content that above-mentioned slump retention agent is obtained according to GB8077-2012 detection method is 42.0%, is obtained above-mentioned
The pH value of slump retention agent is 5.1.
Embodiment 2
Each raw material components are as follows in parts by mass：360 parts of methacrylic ethylene polyethenoxy ethers, 1440 parts of methyl fourths
Alkenyl APEO, 20 parts of sodium peroxydisulfates, 9.6 parts of mercaptopropionic acids, 8 parts of sodium sulfites, 150 parts of acrylic acid, 50 parts of methyl-props
Olefin(e) acid, 40 parts of sodium hydroxides, 2348 parts of water；
By above-mentioned 360 parts of methacrylic ethylene polyethenoxy ethers, above-mentioned 1440 parts of methyl allyl polyoxyethylene ethers
Put into 771 parts of water in reaction unit, open agitating and heating equipment and reactant is heated to 56 DEG C, temperature stops adding after reaching
The polyether solutions that mass percentage concentration is 70% are obtained after heat, fully dissolving, by above-mentioned 9.6 parts of mercaptopropionic acids, above-mentioned 8 parts of sulfurous
Sour sodium and 569 parts of water mixing, stir, the mixing agent solution that mass percentage concentration is 3% are obtained, by above-mentioned 150 parts of propylene
Acid, 50 parts of methacrylic acids and 50 parts of water are mixed to get the minor comonomer solution that mass percentage concentration is 80%, by above-mentioned 40 parts of hydrogen
The mass percentage concentration that sodium oxide molybdena and 60 parts of water are mixed to get is 40% aqueous slkali；
Above-mentioned 20 parts of sodium peroxydisulfates are added in the polyether solutions that above-mentioned mass percentage concentration is 70%, stirred,
The first reactant is obtained, the mixing agent solution that above-mentioned mass percentage concentration is 3% is added dropwise in above-mentioned first reactant, it is above-mentioned
The time for adding for the mixing agent solution that mass percentage concentration is 3% is 1.75 hours, is above-mentioned mass percentage concentration is added dropwise
While 3% mixing agent solution, the minor comonomer solution that above-mentioned mass percentage concentration is 80% is added dropwise to above-mentioned first reaction
In thing, the time for adding for the minor comonomer solution that above-mentioned mass percentage concentration is 80% is 1.25 hours, is obtained after completion of dropwise addition
Second reactant；Wherein, in order that reaction it is more abundant, reaction product performance is more preferable, above-mentioned mass percentage concentration be 80% it is small
The dropwise addition process of monomer solution must be fulfiled ahead of schedule than the dropwise addition process for the mixing agent solution that above-mentioned mass percentage concentration is 3%；
Heat is provided for reactant using reaction heat, reaction temperature is 62 DEG C, and control reactant is in 62 DEG C of isothermal reactions 1.5
Hour, the 3rd reactant is obtained, remaining water in alkali lye and raw material that above-mentioned mass percentage concentration is 40% is added to described the
In three reactants, products therefrom is slump retention agent after reacting 0.5 hour；Obtained according to GB8077-2012 detection method
Solid content to above-mentioned slump retention agent is 51%, and the pH value for obtaining above-mentioned slump retention agent is 6.8.
Embodiment 3
Each raw material components are as follows in parts by mass：825 parts of methacrylic ethylene polyethenoxy ethers, 425 parts of methyl alkene
Propyl group APEO, 400 parts of methyl butene base APEOs, 8.8 parts of hydrogen peroxide, 4.4 parts of mercaptopropionic acids, 5.2 parts of Asias
Sodium sulphate, 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of hydroxypropyl acrylates, 3.5 parts of hy-droxybutyls, 35.2 parts
Sodium hydroxide and 2189.4 parts of water；
By above-mentioned 825 parts of methacrylic ethylene polyethenoxy ethers, 425 parts of methyl allyl polyoxyethylene ethers, 400 parts
In methyl butene base APEO and 888 parts of water input reaction units, open agitating and heating equipment and reactant is heated to 55
DEG C, temperature stops heating after reaching, the polyether solutions that mass percentage concentration is 65% are fully obtained after dissolving, by above-mentioned 4.4 parts
Mercaptopropionic acid, above-mentioned 5.2 parts of sodium sulfites and 470 parts of water mixing, stir, obtain the mixing that mass percentage concentration is 2%
Agent solution, by above-mentioned 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of hydroxypropyl acrylates, 3.5 parts of hy-droxybutyls and
46.7 parts of water mix mass percentage concentration be 70% minor comonomer solution, above-mentioned 35.2 parts of sodium hydroxides and 82.1 parts of water are mixed
Close the aqueous slkali that obtained mass percentage concentration is 30%；
Above-mentioned 8.8 parts of hydrogen peroxide are added in the polyether solutions that above-mentioned mass percentage concentration is 65%, stirred,
The first reactant is obtained, the mixing agent solution that above-mentioned mass percentage concentration is 2% is added dropwise in above-mentioned first reactant, it is above-mentioned
The time for adding for the mixing agent solution that mass percentage concentration is 2% is 1.5 hours, is above-mentioned mass percentage concentration is added dropwise
While 2% mixing agent solution, the minor comonomer solution that above-mentioned weight/mass percentage composition is 70% is added dropwise to above-mentioned first reaction
In thing, time for adding is 1 hour；Wherein, in order that reaction is more abundant, reaction product performance is more preferable, above-mentioned minor comonomer solution
Dropwise addition process must be fulfiled ahead of schedule than the dropwise addition process for the mixing agent solution that above-mentioned mass percentage concentration is 2%；
Heat is provided for reactant using reaction heat, reaction temperature is 60 DEG C, and control reactant is in 60 DEG C of isothermal reactions 1.5
Hour, the 3rd reactant is obtained, remaining water in aqueous slkali and raw material that above-mentioned mass percentage concentration is 30% is added to described
In 3rd reactant, products therefrom is slump retention agent after reacting 0.5 hour；According to GB8077-2012 detection method
The solid content for obtaining above-mentioned slump retention agent is 44.8%, and the pH value for obtaining above-mentioned slump retention agent is 6.0.
Embodiment 4
Each raw material components are as follows in parts by mass：1320 parts of methacrylic ethylene polyethenoxy ethers, 230 parts of methyl alkene
Propyl group APEO, 100 parts of methyl butene base APEOs, 8.8 parts of hydrogen peroxide, 4.4 parts of mercaptopropionic acids, 5.2 parts of Asias
Sodium sulphate, 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of hydroxypropyl acrylates, 3.5 parts of hy-droxybutyls, 35.2 parts
Sodium hydroxide and 2189.4 parts of water；
By above-mentioned 1320 parts of methacrylic ethylene polyethenoxy ethers, 230 parts of methyl allyl polyoxyethylene ethers, 100
In part methyl butene base APEO and 888 parts of water input reaction units, open agitating and heating equipment and be heated to reactant
55 DEG C, temperature stops heating after reaching, the polyether solutions that mass percentage concentration is 65% are fully obtained after dissolving, by above-mentioned 4.4
Part mercaptopropionic acid, above-mentioned 5.2 parts of sodium sulfites and 470 parts of water mixing, stir, obtain mass percentage concentration be 2% it is mixed
Mixture solution, by above-mentioned 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of hydroxypropyl acrylates, 3.5 parts of hy-droxybutyls
And 46.7 parts of water mix mass percentage concentration be 70% minor comonomer solution, by above-mentioned 35.2 parts of sodium hydroxides and 82.1 parts of water
The mass percentage concentration being mixed to get is 30% aqueous slkali；
Above-mentioned 8.8 parts of hydrogen peroxide are added in the polyether solutions that above-mentioned mass percentage concentration is 65%, stirred,
The first reactant is obtained, the mixing agent solution that above-mentioned mass percentage concentration is 2% is added dropwise in above-mentioned first reactant, it is above-mentioned
The time for adding for the mixing agent solution that mass percentage concentration is 2% is 1.5 hours, is above-mentioned mass percentage concentration is added dropwise
While 2% mixing agent solution, the minor comonomer solution that above-mentioned weight/mass percentage composition is 70% is added dropwise to above-mentioned first reaction
In thing, time for adding is 1 hour；Wherein, in order that reaction is more abundant, reaction product performance is more preferable, above-mentioned minor comonomer solution
Dropwise addition process must be fulfiled ahead of schedule than the dropwise addition process for the mixing agent solution that above-mentioned mass percentage concentration is 2%；
Heat is provided for reactant using reaction heat, reaction temperature is 57 DEG C, using electrical bar to above-mentioned second reactant
Heating, control reactant exist, and 58 DEG C of isothermal reactions 1.5 hours, obtain the 3rd reactant, are 30% by above-mentioned mass percentage concentration
Aqueous slkali and raw material in remaining water be added in the 3rd reactant, reaction 0.5 hour after products therefrom be the slump
Retention agent；, the solid content that above-mentioned slump retention agent is obtained according to GB8077-2012 detection method is 44.8%, is obtained
The pH value for stating slump retention agent is 6.1.
Embodiment 5
Each raw material components are as follows in parts by mass：1650 parts of methacrylic ethylene polyethenoxy ethers, 8.8 parts of peroxidating
Hydrogen, 4.4 parts of mercaptopropionic acids, 5.2 parts of sodium sulfites, 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of hydroxypropyl acrylates,
3.5 parts of hy-droxybutyls, 35.2 parts of sodium hydroxides and 2189.4 parts of water；
By in above-mentioned 1650 parts of methacrylic ethylene polyethenoxy ethers and 888 parts of water input reaction units, unlatching is stirred
Mix firing equipment and reactant is heated to 55 DEG C, temperature stops heating after reaching, fully obtaining mass percentage concentration after dissolving is
65% polyether solutions, above-mentioned 4.4 parts of mercaptopropionic acids, above-mentioned 5.2 parts of sodium sulfites and 470 parts of water are mixed, stirs, obtains
To the mixing agent solution that mass percentage concentration is 2%, by above-mentioned 93 parts of acrylic acid, 7 parts of hydroxy-ethyl acrylates, 3.5 parts of acrylic acid
Hydroxypropyl acrylate, 3.5 parts of hy-droxybutyls and 46.7 parts of water mix mass percentage concentration be 70% minor comonomer solution, will be above-mentioned
The mass percentage concentration that 35.2 parts of sodium hydroxides and 82.1 parts of water are mixed to get is 30% aqueous slkali；
Above-mentioned 8.8 parts of hydrogen peroxide are added in the polyether solutions that above-mentioned mass percentage concentration is 65%, stirred,
The first reactant is obtained, the mixing agent solution that above-mentioned mass percentage concentration is 2% is added dropwise in above-mentioned first reactant, it is above-mentioned
The time for adding for the mixing agent solution that mass percentage concentration is 2% is 1.5 hours, is above-mentioned mass percentage concentration is added dropwise
While 2% mixing agent solution, the minor comonomer solution that above-mentioned weight/mass percentage composition is 70% is added dropwise to above-mentioned first reaction
In thing, time for adding is 1 hour；Wherein, in order that reaction is more abundant, reaction product performance is more preferable, above-mentioned minor comonomer solution
Dropwise addition process must be fulfiled ahead of schedule than the dropwise addition process for the mixing agent solution that above-mentioned mass percentage concentration is 2%；
Put using reaction and provide heat for reactant, reaction temperature is 59 DEG C, and control reactant is in 59 DEG C of isothermal reactions 1.5
Hour, the 3rd reactant is obtained, remaining water in aqueous slkali and raw material that above-mentioned mass percentage concentration is 30% is added to described
In 3rd reactant, products therefrom is slump retention agent after reacting 0.5 hour；According to GB8077-2012 detection method
The solid content for obtaining above-mentioned slump retention agent is 44.8%, and the pH value for obtaining above-mentioned slump retention agent is 6.05.
Comparative example 1
The difference of comparative example 1 and embodiment 3 is that in parts by mass, the polyethers in comparative example 1 is 825 parts of methyl
The mixture of allyl polyethenoxy ether and 825 parts of methyl butene base APEOs, minor comonomer are 90 parts of acrylic acid and 17 parts
The mixture of methacrylic acid, slump retention agent is made by the preparation method of above-described embodiment.
Embodiment 1-5 and comparative example are prepared for 6 kinds of slump retention agents, by above-mentioned 6 kinds of products with binder materials (gelling material
Material refers to the mixture of cement, flyash and miberal powder) in the mass ratio incorporation concrete of gross mass 0.2%, incorporation is solid by folding
Cubage；Concrete 1, concrete 2, concrete 3, concrete 4 and concrete 5 is correspondingly made in embodiment 1-5, and comparative example 1 is right
Concrete 6 should be made, wherein, the quality proportioning of above-mentioned concrete is m1 (cement)：M2 (flyash)：M3 (miberal powder)：m4
(sand)：M5 (stone)：M6 (water)=225:80:75:861:971:162, on test method detects as defined in GB8076-2008
The slump, divergence and compression strength of 6 kinds of concrete are stated, measurement result is shown in Table 1.
1 six kinds of testing concrete performance results of table
It can be seen that the combination property of above-mentioned six kinds of concrete is good by embodiment 1-5 and comparative example 1 measurement result,
Meet requirement, illustrate that slump retention agent prepared by the embodiment of the present invention can be used for reality as the additive of concrete
In production；Further illustrate the embodiment of the present invention using methacrylic ethylene polyethenoxy ether as slump retention agent
Synthesis material can prepare the slump retention agent for meeting to require；Wherein, methacrylic ethylene polyethenoxy ether is poly-
Weight/mass percentage composition in ether can be adjusted to obtain the good slump retention agent of combination property according to being actually needed.
Specifically, slump retaining can be prepared by selecting suitable minor comonomer and adjusting the ratio of minor comonomer in the feed
Excellent slump retention agent, the minor comonomer in the embodiment of the present invention is preferably following acrylic acid, methacrylic acid, acrylic acid hydroxyl
Ethyl ester, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxy propyl methacrylate, hy-droxybutyl, hydroxyethyl methacrylate
At least one of butyl ester, methylpropene sodium sulfonate and itaconic acid, obtained slump retention agent is on the slump retaining of concrete
Effect is preferable.
The process of minor comonomer is added dropwise in the embodiment of the present invention to be carried out in two stages, and segmentation, which is added dropwise, can allow generation
Product molecular weight distribution is wider, makes the product combination property of preparation more preferable.
The embodiment of the present invention described above is using methacrylic ethylene polyethenoxy ether as slump retention agent
Synthesis material, go out a kind of novel substance for its development of raw materials, expand the raw material range of choice of slump retention agent, and prepare
Slump retention agent has excellent function of slump protection.
Disclosed above is only the embodiment of the present invention, but protection scope of the present invention is not limited thereto, and is appointed
What those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using above-mentioned scope of the claims as
It is accurate.
Claims (9)
1. slump retention agent, it is characterised in that its raw material is made up of the component of following weight/mass percentage composition：
Wherein, the polyethers is methacrylic ethylene polyethenoxy ether, or the polyethers is that methallyl ethyl glycol gathers
Oxygen vinethene and methyl allyl polyoxyethylene ether and/or the mixture of methyl butene base APEO；
The preparation method of described slump retention agent includes：
Raw material is weighed in proportion, and initiator is added to the polyether solutions that polyethers is 54 DEG C -56 DEG C with the temperature that water is mixed to get
In, the first reactant is obtained, the mixing agent solution that chain-transferring agent, reducing agent and water are mixed to get is added drop-wise to first reaction
In thing, the mixing agent solution, which is added drop-wise in first reactant, needs 1.5 ± 0.25 hours, and the mixing agent solution is added dropwise
While, the minor comonomer solution that minor comonomer and water are mixed to get is added drop-wise in first reactant, the minor comonomer solution
Being added drop-wise in first reactant needs 1.0 ± 0.25 hours, and the second reactant is obtained after completion of dropwise addition；Control described second
For the temperature of reactant at 58 DEG C -62 DEG C, reaction obtains the 3rd reactant after 1.5 hours, the aqueous slkali that alkali and water are mixed to get
It is added to remaining water in raw material in the 3rd reactant, products therefrom is slump retention agent after reacting 0.5 hour.
2. slump retention agent according to claim 1, it is characterised in that the polyethers is that methallyl ethyl glycol gathers
When oxygen vinethene is with the mixture of methyl allyl polyoxyethylene ether and/or methyl butene base APEO, the methyl alkene
The mass percent that propyl glycol APEO accounts for the mixture is 1%-90%.
3. slump retention agent according to claim 1, it is characterised in that the initiator is ammonium persulfate, persulfuric acid
Sodium or hydrogen peroxide；The chain-transferring agent is TGA or mercaptopropionic acid.
4. slump retention agent according to claim 1, it is characterised in that the reducing agent is ascorbic acid, sulfurous acid
Sodium or sodium hydrogensulfite；The alkali is flaky sodium hydrate.
5. slump retention agent according to claim 1, it is characterised in that the minor comonomer is selected from following acrylic acid, first
Base acrylic acid, hydroxy-ethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxy propyl methacrylate, acrylic acid hydroxyl
At least one of butyl ester, methacrylate, methylpropene sodium sulfonate and itaconic acid.
6. slump retention agent according to claim 1, it is characterised in that the solid content of the slump retention agent is
40%-52%, pH value 5-7.
7. slump retention agent according to claim 1, it is characterised in that the mass percentage concentration of the minor comonomer solution
For 60%-80%, the mass percentage concentration of the polyether solutions is 60%-70%, and the quality percentage of the mixing agent solution is dense
Spend for 1%-3%, the mass percentage concentration of the aqueous slkali is 30%-40%.
8. slump retention agent according to claim 1, it is characterised in that when adding the initiator, the polyethers
When the temperature of solution is less than 54 DEG C, using electrical bar or solar energy heating to 54 DEG C -56 DEG C；The temperature of second reactant is small
When 58 DEG C, using electrical bar or solar energy heating to 58 DEG C -62 DEG C.
9. slump retention agent according to claim 1, it is characterised in that the mixing agent solution is added dropwise to described first
Time for adding in reactant is 1.5 hours；The time for adding that the minor comonomer solution is added dropwise in first reactant is 1
Hour.
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| CN110776602A (en) * | 2019-11-28 | 2020-02-11 | 安徽森普新型材料发展有限公司 | Preparation method of plastic retention agent for wet-mixed mortar |
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