CN107057003B - Self-curing type poly carboxylic acid series water reducer and preparation method thereof - Google Patents

Self-curing type poly carboxylic acid series water reducer and preparation method thereof Download PDF

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CN107057003B
CN107057003B CN201710322367.9A CN201710322367A CN107057003B CN 107057003 B CN107057003 B CN 107057003B CN 201710322367 A CN201710322367 A CN 201710322367A CN 107057003 B CN107057003 B CN 107057003B
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self
solution
carboxylic acid
curing type
preparation method
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CN201710322367.9A
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CN107057003A (en
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张明
韩芳芳
陈凌燕
梁飞
张森
贾吉堂
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山东华伟银凯建材科技股份有限公司
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • C08F283/065Macromolecular 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/26Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2688Copolymers containing at least three different monomers
    • C04B24/2694Copolymers containing at least three different monomers containing polyether side chains
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F251/00Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
    • C08F251/02Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045Polymers chosen for their physico-chemical characteristics
    • C04B2103/0059Graft (co-)polymers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302Water reducers

Abstract

The invention belongs to concrete additive technical fields, and in particular to a kind of Self-curing type poly carboxylic acid series water reducer and preparation method thereof.Self-curing type poly carboxylic acid series water reducer is made of polyether macromonomer, minor comonomer, adjusting monomer methyl ricinolcic acid, grafted monomers hydroxyethylmethylcellulose sodium, crosslinking agent ethylene glycol dimethacrylate, chain-transferring agent, initiator and deionized water.After the present invention passes through introduces hydroxyethylmethylcellulose sodium in the molecular structure, and crosslinked dose of ethylene glycol dimethacrylate progress is appropriately crosslinked, it can be swollen, can effectively keep internal water required for hydrated cementitious, there is since conservation function.

Description

Self-curing type poly carboxylic acid series water reducer and preparation method thereof

Technical field

The invention belongs to concrete additive technical fields, and in particular to a kind of Self-curing type poly carboxylic acid series water reducer and its Preparation method.

Background technique

Concrete is as a kind of artificial stone material, due to having the characteristics that pouring property, making convenient, good economy performance And be widely used, have become the basis of modern society.High-strength concrete is a direction of concrete development, is being matched Feature in system is low water binder ratio.After hydration reaction occurs due to cement and water, concrete can be sent out because of the reduction of moisture Raw autogenous shrinkage, and general concrete contraction distortion is all limited, inside will generate tensile stress, will lead to concrete generation Crack, so that the durability of concrete reduces.It then becomes necessary to take certain maintenance measure to control moisture evaporation, promote The maximum aquation of cement.Maintenance has a major impact the durability of concrete, if lacking maintenance measure appropriate, even if Superior in quality concrete also can recurring structure deterioration and durability reduction.

The maintenance process of concrete is broadly divided into internal maintenance and external two kinds of maintenance.External maintenance process is usually to mixed Solidifying soil surface water spray covers wet straw bag and the maintenance of plastic covering film etc., prevents the evaporation of moisture.But these maintenance processes not only take When expenses of labour, and since High Strength Concrete Structures are closely knit, external maintenance hardly enters inside concrete with water, needed for hydrated cementitious Moisture be unable to get supplement, be difficult to obtain preferable maintenance effect.In order to supplement water source required for hydrated cementitious, usually will Interior curing agent is incorporated into concrete, so that miniature " storage reservoir " of water storage is formed in inside concrete, it is then negative in pore Moisture is released to promote the continuation aquation of cement under pressure and moist gradient effect, and then inhibits its self-constriction, enhances length Phase durability and reduction maintenance cost.

Concrete inner curing agent is a kind of containing strongly hydrophilics groups such as carboxyl and hydroxyls, can form hydrogen bond with water and water occurs Cooperation is in gel with a large amount of liquid water is absorbed rapidly.Under normal circumstances, even if Free water is fixed on polymeric inner and exists Also it is difficult to overflow under conditions of high pressure, but moisture can be released in the case where environmental pH or big ion concentration.In cement water In change system, as the calcium ion that aquation generates is dissolved into water, the pH value of system constantly rises, and interior curing agent is promoted constantly to release Moisture is released, ensure that moisture required for hydrated cementitious, the early stage and later period for reducing concrete shrink, and improve the resistance to of concrete Long performance prevents the intrusion of hazardous medium.

Poly carboxylic acid series water reducer is to grow up after lignin sulfonic acid system ordinary water-reducing agent and naphthalene series high-efficiency water-reducing agent Three generations's cement water reducing agent has the characteristics that molecular structure designability is strong and high performance potentiality are big.Currently, polycarboxylic-acid subtracts Aqua presents the trend of functionalization and seriation.Different function functional group raw material and matched synthesis are had by selection Method can synthesize with diminishing, protect collapse, reduce, the poly carboxylic acid series water reducer of the functions such as low entraining.

Application No. is the patents of CN201610891047.0 to select acrylic acid, Lygodium japonicum, polyethyleneimine and polysorbate Equal raw material obtain a kind of early-strength polycarboxylic acid water reducing agent by the processing such as ultrasound and centrifugation.

The patent of Chinese patent CN201410461242.0 describes a kind of monomer A isopentene group polyoxyethylene ether, list Body B acrylic acid, monomer C maleic anhydride and monomer D methylallyl alcohol polybutylene oxypropylene group ether synthesize a kind of low entraining decrement Type polycarboxylate water-reducer, the product just with preferable diminishing and reduce cement mortar and concrete shrinkage at low dosage Effect.

The patent of Chinese patent CN201610930001.5 describe it is a kind of with unsaturated polyoxyethylene ether, unsaturated acids, Beta-unsaturated esters, amide derivatives, crosslinking agent, commercially available anti-mud auxiliary agent and deionized water, which are prepared, collapses with a kind of collection diminishing, guarantor, resists Mud and early powerful comprehensive polycarboxylate water-reducer.

The prior art can be by selecting the monomer of different function functional group to synthesize the polycarboxylic-acid with corresponding function type Water-reducing agent, but all it is not directed to the poly carboxylic acid series water reducer of Self-curing type function.

Summary of the invention

The object of the present invention is to provide a kind of Self-curing type poly carboxylic acid series water reducer, by reasonable Molecular Design, The monomer of different function functional group is selected, so that product in addition to preferable diminishing and model retention effect, also has Self-curing function Can, alleviate the problem of soil mechanics and endurance quality difference that concrete especially high-grade concrete occurs by dehydration.

Self-curing type poly carboxylic acid series water reducer of the present invention is by polyether macromonomer, minor comonomer, adjusts monomer castor-oil plant Methyl oleate, grafted monomers hydroxyethylmethylcellulose sodium, crosslinking agent ethylene glycol dimethacrylate, chain-transferring agent, initiation Agent and deionized water are made.

The polyether macromonomer is isopentene group polyoxyethylene ether (TPEG) or methyl allyl polyoxyethylene ether (HPEG), molecular weight 1000-3000.

The minor comonomer is the mixture of acrylic acid and acrylamide, and the molar ratio of acrylamide and acrylic acid is 1:3- 6。

The chain-transferring agent is sulfhydryl compound, and the dosage of chain-transferring agent is polyether macromonomer, minor comonomer, adjusts monomer With the 0.1-1.0% of grafted monomers total weight.

The initiator is persulfate or peroxide, and the dosage of initiator is polyether macromonomer, minor comonomer, adjusting The 0.5-2.5% of monomer and grafted monomers total weight.

The polyether macromonomer, minor comonomer, to adjust the molar ratio of monomer, grafted monomers and crosslinking agent be 1:3-5:0.2- 0.5:0.1-0.2:0.05-0.1.

The preparation method of Self-curing type poly carboxylic acid series water reducer of the present invention, steps are as follows:

(1) deionized water and grafted monomers hydroxyethylmethylcellulose sodium are first added into reaction kettle, is heated to 50-80 DEG C, obtain liquid on earth;

(2) by polyether macromonomer and deionized water wiring solution-forming A, by minor comonomer, monomer methyl ricinolcic acid, crosslinking are adjusted Agent ethylene glycol dimethacrylate, chain-transferring agent and deionized water are configured to solution B, initiator and deionized water are made into molten Liquid C;In the case where reaction temperature is 50-80 DEG C, solution A, B and C are instilled in the liquid of bottom simultaneously;

(3) after being added dropwise, at 50-80 DEG C, continue insulation reaction 1.0-2.0h;

(4) it is down to room temperature, adjusts pH to 7-9 with sodium hydroxide, and add deionized water that the total solid content of reaction system is dilute Release 20-30% to get.

The mass concentration of bottom liquid described in step (1) is 5-7%.

The mass concentration of solution A described in step (2) is 30-50%, and the mass concentration of solution B is 40-60%, solution The mass concentration of C is 3-5%.

The instillation time of solution A described in step (2) is 4.0h, and the instillation time of solution B is 4.0h, the drop of solution C The angle of incidence is 4.5h.

Solution A, B and C are instilled in the liquid of bottom simultaneously in step (2), wherein solution A 4.0h is at the uniform velocity dripped off, solution B 4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.

The mode that the present invention takes polyether macromonomer solution, minor comonomer solution and initiator solution to be added dropwise respectively, is conducive to Synthesize the equilibrium of water-reducing agent molecular structure;The polymerization activity of acrylic acid and acrylamide is larger, and chain-transferring agent is added, to adjust certainly By base reaction rate.

Pass through the graft copolymerization hydroxyethylmethylcellulose in the poly carboxylic acid series water reducer molecular structure with comb shaped structure Sodium, and after the crosslinking of crosslinked dose of ethylene glycol dimethacrylate progress appropriateness, the hydrating structure of polyhydroxy is generated, it can be effective Holding hydrated cementitious required for internal water, then slowly release moisture under the alkaline environment of concrete, make it have Absorb water since conservation function.

The electrostatic repulsion that the space steric effect and carboxyl that polyether macromonomer branch in diminishing agent molecule generates provide is made With and amide groups hydrolysis slow releasing function so that diminishing agent molecule shows excellent diminishing and guarantor after being adsorbed by cement granules It collapses performance.

The addition for adjusting monomer methyl ricinolcic acid, so that poly carboxylic acid series water reducer molecule is with the same of hydrating structure When, still there is certain hydrophobicity, workability, physical mechanics property and the durability for keeping the concrete that water-reducing agent is added excellent Energy.

Compared with prior art, the present invention having the following beneficial effects:

(1) by introducing hydroxyethylmethylcellulose sodium, and crosslinked dose of dimethacrylate second two in the molecular structure After alcohol ester progress is appropriately crosslinked, it can be swollen, can effectively keep internal water required for hydrated cementitious, there is Self-curing function Energy.Acrylamide hydrolyzes under alkaline condition has slump-retaining energy;Contain ehter bond in polyether macromonomer, in alkaline environment There is down preferable stability.Methyl ricinolcic acid can increase the hydrophobicity of water-reducing agent, have concrete preferable comprehensive Energy.

(2) in polymerization reaction, the mode for taking polyether macromonomer solution, minor comonomer solution and initiator solution to be added dropwise, drop Low manipulation strength, controllability is strong, and advantageously ensures that the quality for generating water-reducing agent product.

Specific embodiment

The present invention is described further with reference to embodiments.

To simplify statement, isopentene group polyoxyethylene ether is indicated with TPEG below, and HPEG indicates methacrylic polyoxy second Alkene ether;QYN indicates hydroxyethylmethylcellulose sodium;BMZ indicates methyl ricinolcic acid;ACAM indicates acrylamide;AA indicates third Olefin(e) acid;RJZ indicates ethylene glycol dimethacrylate.

Embodiment 1

Polymeric monomer TPEG: minor comonomer ACAM and AA: TPEG molecular weight 1200 adjusts monomer BMZ: grafted monomers QYN: crosslinking The molar ratio of agent RJZ is 1:3.5:0.2:0.1:0.05, and wherein the molar ratio of ACAM:AA is 1:5, and chain-transferring agent is sulfydryl second Acid, dosage are the 0.1% of polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers gross mass, and initiator is persulfuric acid Potassium, dosage be polyether macromonomer, minor comonomer, adjust monomer and grafted monomers gross mass 0.5%, be made into 3.0% it is water-soluble Liquid.

QYN is added into reaction flask, and deionized water is added and is made into the bottom liquid that concentration is 5%, opens stirring, is warming up to 60 ℃.TPEG adds deionized water to be made into 50% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 30% Solution B, and initiator potassium persulfate solution C, while being added drop-wise in 60 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off, molten Liquid B 4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C adds, continue to keep the temperature 1.5h at 60 DEG C.It is cooled to 30 DEG C hereinafter, with sodium hydroxide adjust pH to 7-8, add water and adjust to solid content 30%, as Self-curing type polycarboxylic-acid diminishing Agent product S-1.

Embodiment 2

Polymeric monomer HPEG: minor comonomer ACAM and AA: HPEG molecular weight 2400 adjusts monomer BMZ: grafted monomers QYN: crosslinking The molar ratio of agent RJZ is 1:5:0.3:0.1:0.08, and wherein the molar ratio of ACAM:AA is 1:4, and chain-transferring agent is thioacetic acid, Its dosage is the 0.5% of polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers gross mass, and initiator is potassium peroxydisulfate, Dosage is the 0.6% of polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers gross mass, is made into 3.0% aqueous solution.

QYN is added into reaction flask, and deionized water is added and is made into the bottom liquid that concentration is 6%, opens stirring, is warming up to 70 ℃.TPEG adds deionized water to be made into 30% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 30% Solution B and initiator potassium persulfate solution C, while being added drop-wise in 70 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off, molten Liquid B 4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C adds, continue to keep the temperature 1.0h at 60 DEG C.It is cooled to 30 DEG C hereinafter, with sodium hydroxide adjust pH to 7-8, add water and adjust to solid content 30%, as Self-curing type polycarboxylic-acid diminishing Agent product S-2.

Embodiment 3

Polymeric monomer HPEG: minor comonomer ACAM and AA: HPEG molecular weight 3000 adjusts monomer BMZ: grafted monomers QYN: crosslinking The molar ratio of agent RJZ is 1:4:0.4:0.1:0.1, and wherein the molar ratio of ACAM:AA is 1:4, and chain-transferring agent is mercaptopropionic acid, Dosage is the 0.2% of polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers gross mass, and initiator is ammonium persulfate, is used Amount is the 1.0% of polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers gross mass, is made into 5.0% aqueous solution.

QYN is added in reaction flask, and deionized water is added and is made into the bottom liquid that concentration is 7%, stirring is opened, is warming up to 60℃.TPEG adds deionized water to be made into 40% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 35% Solution B and initiator ammonium persulfate solution C, while being added drop-wise in 60 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off, Solution B 4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C adds, continuation keeps the temperature 1.0h at 60 DEG C.It is cooled to 30 DEG C hereinafter, being added water and being adjusted to solid content 30%, as Self-curing type polycarboxylic-acid is subtracted with sodium hydroxide adjusting pH to 7-8 Aqua product S-3.

Comparative example 1

The molar ratio of TPEG molecular weight 2400, TPEG:AA:ACAM is 1:2:1, and initiator is hydrogen peroxide, and dosage is The 1.0% of monomer gross mass is made into 3.0% aqueous solution;Chain-transferring agent is thioacetic acid, and dosage is monomer gross mass 0.3%.

TPEG2400 is added in reaction flask, and deionized water is added and is made into the bottom liquid that concentration is 40%, opens stirring, It is warming up to 60 DEG C.By ACAM, AA, chain-transferring agent and a certain amount of water be made into 30% water solution A and initiator hydrogen peroxide it is molten Liquid B, while being added drop-wise in 60 DEG C of bottom liquid, 4.0h is dripped off.A, B material keeps the temperature 1.5h after adding again.30 DEG C are cooled to hereinafter, using hydrogen Sodium oxide molybdena adjusts pH to 7-8, adds water to adjust to solid content to 30% or so, that is, obtains contrast product C-1.

Comparative example 2

HPEG molecular weight 3000, HPEG:AA:ACAM molar ratio are 1:3:1, and initiator is ammonium persulfate, and dosage is single The 0.7% of body gross mass is made into 5.0% aqueous solution;Chain-transferring agent is mercaptopropionic acid, and dosage is monomer gross mass 0.2%.

It is the deionized water of HPEG3000 gross mass 45% as bottom water that dosage is added into reaction flask, opens stirring, rises Temperature is to 70 DEG C.The deionized water of the HPEG amount of reordering is made into 40% water solution A, AA, ACAM, chain-transferring agent mercaptopropionic acid and one Quantitative water is made into 35% aqueous solution B and initiator ammonium persulfate solution C, while being added drop-wise in 70 DEG C of bottom water.Wherein A expects 4.0h is at the uniform velocity dripped off, and B material 4.0h is at the uniform velocity dripped off, and C material 4.5h is at the uniform velocity dripped off.After C material adds, continuation keeps the temperature 1.0h at 70 DEG C. 30 DEG C are cooled to hereinafter, being added water and being adjusted to solid content 30%, i.e. acquisition contrast product C- with sodium hydroxide adjusting pH to 7-8 2。

Comparative example 3

HPEG molecular weight 2400, HPEG:AA:ACAM molar ratio are 1:4:1, and initiator is potassium peroxydisulfate, and dosage is single The 1.5% of body gross mass is made into 5.0% aqueous solution;Chain-transferring agent is thioacetic acid, and dosage is monomer gross mass 0.3%.

HPEG2400 is added in reaction flask, a certain amount of deionized water is added and is made into the bottom liquid that concentration is 45%, it will ACAM, AA, chain-transferring agent and a certain amount of water are made into 50% water solution A and initiator potassium persulfate solution B, are added drop-wise to simultaneously In 60 DEG C of bottom liquid, A material 3.5h is added, and B material 3.0h is dripped off.After A material adds, continuation keeps the temperature 1.0h at 60 DEG C.It is cooled to 30 DEG C hereinafter, adjust pH to 7-8 with sodium hydroxide, adds water to adjust to solid content to 30% or so, that is, obtain contrast product C-3.

Implementation result

The using effect of above-mentioned 3 embodiments and 3 comparative examples is specifically described below:

Select 42.5 cement of mountain aluminium board P.O;Sand is sand in IIth area, fineness modulus 2.7, clay content 1.2%;Stone Son uses partial size for the rubble of nominal 5mm-20mm, and using graduation two, wherein 5mm-10mm accounts for 30%, 10mm-20mm and accounts for 70%, Meet continuous grading requirement;Miberal powder: S95 grades;Flyash: II grade;C50 concrete mix is cement: miberal powder: flyash: sand Son: stone: water=370:60:60:670:1115:155.

Workability of concrete, 28d compression strength and cracking resistance are detected.The sample that 3 embodiments obtain is in order Number is S-1, S-2, S-3;It is C-1, C-2, C-3 that the sample that 3 comparative examples obtain is numbered in order;Test result is shown in Table 1.

1 embodiment 1-3 of table and the detection of comparative example 1-3 properties of product

From table 1 it follows that using Self-curing type polycarboxylic-acid compared with common poly carboxylic acid series water reducer C1-C3 Water-reducing agent concrete water-reducing ratio is although low, but the slump-loss of product is smaller, and 28d compression strength is higher, and concrete cracking Striped is few and area of cracks is also small, even without cracking.

Claims (9)

1. a kind of preparation method of Self-curing type poly carboxylic acid series water reducer, it is characterised in that steps are as follows:
(1) deionized water and grafted monomers hydroxyethylmethylcellulose sodium are first added into reaction kettle, is heated to 50-80 DEG C, obtains Liquid on earth;
(2) by polyether macromonomer and deionized water wiring solution-forming A, by minor comonomer, monomer methyl ricinolcic acid, crosslinking agent two are adjusted Methacrylic acid glycol ester, chain-transferring agent and deionized water are configured to solution B, by initiator and deionized water wiring solution-forming C; In the case where reaction temperature is 50-80 DEG C, solution A, B and C are instilled in the liquid of bottom simultaneously;
(3) after being added dropwise, at 50-80 DEG C, continue insulation reaction 1.0-2.0h;
(4) it is down to room temperature, adjusts pH to 7-9 with sodium hydroxide, and deionized water is added to be diluted to the total solid content of reaction system 20-30% to get.
2. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described is poly- Ether polymeric monomer is isopentene group polyoxyethylene ether or methyl allyl polyoxyethylene ether, molecular weight 1000-3000.
3. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described is small Monomer is the mixture of acrylic acid and acrylamide, and the molar ratio of acrylamide and acrylic acid is 1:3-6.
4. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that the chain Transfer agent is sulfhydryl compound, and the dosage of chain-transferring agent is polyether macromonomer, minor comonomer, adjusts monomer and grafted monomers total weight 0.1-1.0%.
5. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described draws Hair agent is persulfate or peroxide, and the dosage of initiator is that polyether macromonomer, minor comonomer, adjusting monomer and grafted monomers are total The 0.5-2.5% of weight.
6. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described is poly- Ether polymeric monomer, minor comonomer adjust the molar ratio of monomer, grafted monomers and crosslinking agent as 1:3-5:0.2-0.5:0.1-0.2: 0.05-0.1。
7. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that in step (1) The mass concentration of the bottom liquid is 5-7%.
8. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that in step (2) The mass concentration of the solution A is 30-50%, and the mass concentration of solution B is 40-60%, and the mass concentration of solution C is 3- 5%.
9. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that in step (2) The instillation time of the solution A is 4.0h, and the instillation time of solution B is 4.0h, and the instillation time of solution C is 4.5h.
CN201710322367.9A 2017-05-09 2017-05-09 Self-curing type poly carboxylic acid series water reducer and preparation method thereof CN107057003B (en)

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CN105778009A (en) * 2015-12-31 2016-07-20 联泓(江苏)新材料研究院有限公司 Early strength polycarboxylic acid water reducing agent and preparation method thereof, and cement admixture
CN105924590A (en) * 2016-04-26 2016-09-07 陕西德盛新能源有限公司 Preparation method of polycarboxylate concrete water reducer

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