CN105566572A - Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof - Google Patents

Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof Download PDF

Info

Publication number
CN105566572A
CN105566572A CN201510952562.0A CN201510952562A CN105566572A CN 105566572 A CN105566572 A CN 105566572A CN 201510952562 A CN201510952562 A CN 201510952562A CN 105566572 A CN105566572 A CN 105566572A
Authority
CN
China
Prior art keywords
plasticity
maleic anhydride
acid
takes
maleic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510952562.0A
Other languages
Chinese (zh)
Inventor
刘荣进
冯昌恒
陈平
韦家崭
赵艳荣
周睿哲
陈康莉
李三破
丁欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guilin University of Technology
Original Assignee
Guilin University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guilin University of Technology filed Critical Guilin University of Technology
Priority to CN201510952562.0A priority Critical patent/CN105566572A/en
Publication of CN105566572A publication Critical patent/CN105566572A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
    • C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
    • C04B24/2658—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B7/00—Preparation of cellulose esters of both organic and inorganic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and a preparation method thereof. The method comprises the following steps: synthesizing an intermediate polyester from maleic anhydride, cellulose hydroxypropyl methyl ether and phosphorous acid at 60-100 DEG C by a metal salt catalytic process; and carrying out water solution polymerization on the polyester, unsaturated acid monomer, unsaturated polyoxyethylene large monomer, acrylamide monomer, initiator and other raw materials at 40-70 DEG C, and neutralizing to obtain the maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent. The intermediate polyester has the effect of increasing the plasticity stability of the freshly mixed mortar; and the end product maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent has the comprehensive effects of favorable dispersity, plasticity maintaining property and thickening property on the freshly mixed mortar. The maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent has the advantages of no toxicity or odor and favorable compatibility with cement, does not lower the hardening property of cement, is a green environment-friendly product, and is expected to have great potential application value in the field of wet mixed mortar.

Description

A kind of maleic anhydride graft type poly carboxylic acid plasticity-retention agent and preparation method thereof
Technical field
The invention belongs to grout additive preparing technical field, particularly a kind of maleic anhydride graft type poly carboxylic acid plasticity-retention agent and preparation method thereof.
Background technology
In construction work, comparatively common, consumption is huge and one of broad-spectrum material of construction is exactly mortar.The on-the-spot mixing mortar quality of mortar is unstable before this, and construction labour intensity is large, and construction noise is large, and dust pollution is serious, contaminate environment.In June, 2007, Department of Commerce, the Ministry of Construction etc. six department issued " notice about forbidding Site mortar working at urban time limit ", carry out and prohibit the use cement mixing mortar working matters at the construction field (site).This regulation is called as " mortar is prohibited existing ".
Dry-mixed mortar had been once the direction of building mortar development, but dry-mixed mortar production process needs sand to dry, and consume mass energy, thus cost is high; Also there is the problem such as dust pollution, the separation of Storing and conveying process materials, many factors causes dry-mixed mortar industry development not smooth simultaneously.Wet mixing mortar becomes the emphasis direction of building industry Sustainable development in recent years.Compared with dry-mixed mortar, wet mixing mortar advantage is: be first that cost is lower, because gather materials do not need drying and processing, corresponding starting material loss is low; Next is without the need to investing new installation, only need reequip on existing concrete whipping device basis; Be easy construction again, without the need to carrying out secondary stirring in building site, wet mixing mortar can use to scene; Be finally steady quality, factory concentrates batching, stir and avoid on-the-spot short run and to prepare burden the composition fluctuation problem caused.
Due to the singularity of mortar construction, its engineering time is longer, proposes particular requirement to wet mixing mortar plasticity.The key problem in technology of wet mixing mortar is that can mortar keep its good plasticity for a long time, specifically refer to mortar mixture transport and when parking inner each component keep the character of evenly, not emanating, i.e. protect plasticity or plasticity stability.
Mortar additive is the key regulating wet mixing mortar plasticity, mainly plays water reducing and strength increasing, thickening water conservation, delayed coagulation.Water reducing and strength increasing shows as minimizing unit consumption of water, improves the mobility of mortar mixture, improves the dispersiveness of mortar strength and cement.Because after cement plus water mix, due to the effect of cement granules molecular attraction, make grout form flucculation structure, make the mixing water of 10% ~ 30% be wrapped among cement granules, can not unrestricted flow be participated in, thus have impact on the mobility of mixture.After adding admixture, because admixture molecular energy oriented adsorption is in cement particle surface, make cement particle surface with same electric charge, form electrostatic repulsion, impel cement granules mutually to disperse, flucculation structure is destroyed, and discharges and is wrapped part water, participate in flowing, thus effectively increase the mobility of compound.But in transport, the process deposited, there is sinking of gathering materials, the phenomenon that moisture floats i.e. bleeding, bleeding is mortar working importance, also can increase quality influence, so diminishing dissemination can not meet the homogeneity of the long-time wet mixing mortar placed, mortar also will have thickening water-retentivity, and thickening water-retentivity refers to that Mortar mix keeps moisture not easily precipitation ability, increases the stability of slurry.Due to the impact of wet mixing mortar construction character, also need the plasticity hold facility of long period, so certain latent aquation delaying cement will be had, make the plasticity that wet mixing mortar keeps good in a long time, thus regulate time of coagulation.Need many-sided function such as diminishing, thickening, water conservation, slow setting of synthesizing and coordinating wet mixing mortar admixture, just can prepare performance and give prominence to, the wet mixing mortar that application property is good.
Patent CN103553413A describes a kind of tune and glues type polycarboxylate water-reducer and preparation method thereof, vinylformic acid, allyl polyethenoxy ether, octadecyl acrylate is adopted to synthesize as raw material, though under the requirement of satisfied construction concrete flowability and viscosity, solve the bleeding of fresh concrete, segregation problem, but it is short that guarantor moulds the time, guarantor is moulded the longer wet mixing mortar of time requirement and is not suitable for.A kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof is reported in patent CN101830663X, adopt dimethylaminoethyl methacrylate, allyl polyglycol and toxilic acid to catch up with and carry out the synthesis of poly carboxylic acid series water reducer as raw material, although introduce dimethylaminoethyl methacrylate, but due to the problem of itself, water-reducing rate and slump retaining are not fine.Patent CN201210056013.1 describes a kind of multi-branched polycarboxylic water reducer with function of slump protection and preparation method thereof.A kind of multi-branched polycarboxylic water reducer with function of slump protection of disclosure of the invention, this polycarboxylate water-reducer accounts for 3 ~ 10% of total reactant weight by monomer A; Monomers B accounts for 80 ~ 90% of total reactant weight; Monomer C accounts for 3 ~ 6% of reactant total reactant weight; Single D body accounts for 0.5 ~ 2% of total reactant total amount to carry out aqueous solution polymerization and forms under the effect of polymerization starter.The technical scheme that this invention adopts not only itself has protects the effect of collapsing preferably, used in combination with the polycarboxylate water-reducer of other classifications, can improve the function of slump protection of other products.But this water reducer water-reducing rate is on the low side, and diminishing function does not have slowly releasing effect, cannot meet plasticity requirements time longer engineering.
In general, it is fast that existing wet mixing mortar admixture or guarantor mould time short, fluidity loss, otherwise thickening to increase steady effect bad.Prohibiting an existing difficult problem to tackle mortar, promoting the use of wet mixing mortar, need research and development for controlling mortar hardening speed and having the plasticity-retention agent of thickening function.The present invention synthesizes a kind of polyester with double bond with maleic anhydride graft HPMC structural unit and phosphate groups, and goes out plasticity-retention agent with other monomers by copolymerization.
Summary of the invention
The object of the invention is to mould admixture for existing poly carboxylic acid guarantor can not mould the deficiency with thickening to wet mixing mortar guarantor simultaneously, a kind of maleic anhydride graft type poly carboxylic acid plasticity-retention agent and preparation method thereof is provided.
Principle of the present invention: under certain condition, maleic anhydride can reservation double bond while with phosphorous acid, HPMC generation graft reaction, copolyreaction can be produced with unsaturated monomer under the condition of initiator, introduce the phosphate group with slow setting function and the HPMC with the steady effect of thickening increasing at molecular structure simultaneously, realize the dispersion to wet mixing mortar, thickening increases surely and guarantor moulds effect.
The molecular structural formula of maleic anhydride graft type poly carboxylic acid plasticity-retention agent of the present invention is as follows:
；
Wherein, R, R 1, R 2and R 3for-H or-CH 3, M is Na +or K +, the span of a, b, c, d and m is the span of 5 ~ 10, n is 10 ~ 35.
The concrete steps preparing above-mentioned maleic anhydride graft type poly carboxylic acid plasticity-retention agent are:
(1) take raw material according to following mass percent: acetate 0.5 ~ 2.0%, vitriol 0.2 ~ 2.0%, maleic anhydride 5 ~ 10%, HPMC 2 ~ 10%, phosphorous acid 5 ~ 10% and glacial acetic acid 70 ~ 90%, the mass percent sum of described raw material is 100%.
(2) maleic anhydride, HPMC, phosphorous acid and glacial acetic acid that step (1) takes are put into reactor, be warming up to 60 ~ 100 DEG C, then add acetate and vitriol, continue reaction 4 ~ 6h, be cooled to room temperature after completion of the reaction, after drying obtained polyester.
(3) raw material is taken according to following mass percent: the polyester 0.1 ~ 1.0% that step (2) obtains, unsaturated acrylic monomer 1.0 ~ 5.0%, unsaturated polyoxyethylene polymeric monomer 15 ~ 25%, acrylamide monomers 0.1 ~ 1.0%, oxygenant 0.5 ~ 2.5%, reductive agent 0.5 ~ 2.5%, alkali 0.1 ~ 3.0%, three parts of deionized waters A, B and C, the mass percent of three parts of deionized waters is respectively 20 ~ 40%, 10 ~ 30% and 10 ~ 30%, and the mass percent sum of above-mentioned raw materials is 100%.
(4) by unsaturated acrylic monomer that step (3) takes, unsaturated polyoxyethylene polymeric monomer and acrylamide monomers are dissolved in the A deionized water that step (3) takes, put into reactor, then the oxygenant that step (3) takes is dissolved in B deionized water, the reductive agent that step (3) takes is dissolved in C deionized water, instilled respectively in reactor by peristaltic pump, control 3 ~ 5h to drip off, after dripping 2 ~ 4h, add the polyester that step (3) takes, arranging temperature of reaction is 40 ~ 70 DEG C, insulation reaction 1 ~ 2h, finally use pH value to 6 ~ 8 of alkali regulation system, i.e. obtained maleic anhydride graft type poly carboxylic acid plasticity-retention agent.
Described acetate is sodium-acetate or Potassium ethanoate.
Described vitriol is ferric sulfate or ferrous sulfate.
Described unsaturated acrylic monomer is one or more in methacrylic acid, vinylformic acid and maleic anhydride.
Described unsaturated polyoxyethylene polymeric monomer is one or more in acrylic ester, Methylacrylic Acid Polyoxyethylene Ester, allyl polyethenoxy ether, methyl allyl alcohol polyoxyethylene ether and isopentenol polyoxyethylene ether.
Described acrylamide monomers is one or both of acrylamide and Methacrylamide.
Described oxygenant is persulfuric acid by, one or both in Sodium Persulfate, Potassium Persulphate and hydrogen peroxide.
Described reductive agent is one or both in xitix, S-WAT, Sodium Pyrosulfite, sodium bisulfite and vitamins C.
Described alkali is NaOH or KOH.
The present invention has the following advantages:
(1) in plasticity-retention agent molecular structure of the present invention owing to having negatively charged ion and the long branched chain structure of certain density, improve dispersiveness, meet sterically hindered theory.
(2) the present invention is with maleic anhydride graft HPMC molecular structure unit and phosphate group, is incorporated in plasticity-retention agent molecular structure, and then reaches plasticity-retention agent and have water reducing and strength increasing, thickening water conservation, the net effect of delayed coagulation.
(3) the present invention's side chain in grafting on the molecule of plasticity-retention agent, in the high alkalinity environment of hydrated cementitious, this side chain can slowly be cut off, thus is released the group with thickening slow setting, reaches long-time guarantor and moulds the object with thickening.
Embodiment
embodiment 1:
(1) raw material is taken according to following consumption: 1.0g sodium-acetate, 0.2g ferric sulfate, 5.0g maleic anhydride, 2.0g HPMC (HPMC), 5.0g phosphorous acid and glacial acetic acid 100ml.
(2) maleic anhydride, HPMC, phosphorous acid and glacial acetic acid that step (1) takes are put into reactor, be warming up to 90 DEG C, add sodium-acetate and ferric sulfate that step (1) takes again, continue reaction 4h, be cooled to room temperature after completion of the reaction, after drying obtained polyester.
(3) raw material is taken according to following consumption: the polyester that 0.24g step (2) obtains, 1g maleic anhydride (MAL), 1.5g vinylformic acid (AA), 20g methyl allyl alcohol polyoxyethylene ether (HPEG), 0.24g acrylamide (AM), 1.2g hydrogen peroxide, 0.4g xitix, 0.28gNaOH, three parts of deionized waters A, B and C, the quality of three parts of deionized waters is respectively 25g, 20g and 20g.
(4) maleic anhydride (MAL) step (3) taken, vinylformic acid (AA), methyl allyl alcohol polyoxyethylene ether (HPEG) and acrylamide (AM) are dissolved in the A deionized water that step (3) takes, put into reactor, then the hydrogen peroxide that step (3) takes is dissolved in B deionized water, the xitix that step (3) takes is dissolved in C deionized water, instilled respectively in reactor by peristaltic pump, control 4h drips off, after dripping 3h, add the polyester that step (3) takes, arranging temperature of reaction is 55 DEG C, insulation reaction 1h, the pH value to 7 of the NaOH regulation system finally using step (3) to take, i.e. obtained maleic anhydride graft type poly carboxylic acid plasticity-retention agent.
embodiment 2:
(1) raw material is taken according to following consumption: 1.0g sodium-acetate, 0.2g ferric sulfate, 5.0g maleic anhydride, 2.0g HPMC (HPMC), 5.0g phosphorous acid and glacial acetic acid 100ml.
(2) maleic anhydride, HPMC, phosphorous acid and glacial acetic acid that step (1) takes are put into reactor, be warming up to 90 DEG C, add sodium-acetate and ferric sulfate that step (1) takes again, continue reaction 4h, be cooled to room temperature after completion of the reaction, after drying obtained polyester.
(3) raw material is taken according to following consumption: the polyester that 0.24g step (2) obtains, 1g maleic anhydride (MAL), 1.5g vinylformic acid (AA), 20g methyl allyl alcohol polyoxyethylene ether (HPEG), 0.28g Methacrylamide, 1.2g hydrogen peroxide, 0.4g xitix, 0.28gNaOH, three parts of deionized waters A, B and C, the quality of three parts of deionized waters is respectively 25g, 20g and 20g.
(4) maleic anhydride (MAL) step (3) taken, vinylformic acid (AA), methyl allyl alcohol polyoxyethylene ether (HPEG) and Methacrylamide are dissolved in the A deionized water that step (3) takes, put into reactor, then the hydrogen peroxide that step (3) takes is dissolved in B deionized water, the xitix that step (3) takes is dissolved in C deionized water, instilled respectively in reactor by peristaltic pump, control 4h drips off, after dripping 3h, add the polyester that step (3) takes, arranging temperature of reaction is 55 DEG C, insulation reaction 1h, the pH value to 6 of the NaOH regulation system finally using step (3) to take, i.e. obtained maleic anhydride graft type poly carboxylic acid plasticity-retention agent.
embodiment 3:
(1) raw material is taken according to following consumption: 1.0g sodium-acetate, 0.2g ferric sulfate, 5.0g maleic anhydride, 2.0g HPMC (HPMC), 5.0g phosphorous acid and glacial acetic acid 100ml.
(2) maleic anhydride, HPMC, phosphorous acid and glacial acetic acid that step (1) takes are put into reactor, be warming up to 90 DEG C, add sodium-acetate and ferric sulfate that step (1) takes again, continue reaction 4h, be cooled to room temperature after completion of the reaction, after drying obtained polyester.
(3) raw material is taken according to following consumption: the polyester that 0.24g step (2) obtains, 1g maleic anhydride (MAL), 1g vinylformic acid (AA), 0.5g methacrylic acid, 20g methyl allyl alcohol polyoxyethylene ether (HPEG), 0.24g acrylamide (AM), 1.2g hydrogen peroxide, 0.4g xitix, 0.28gNaOH, three parts of deionized waters A, B and C, the quality of three parts of deionized waters is respectively 25g, 20g and 20g.
(4) maleic anhydride (MAL) step (3) taken, vinylformic acid (AA), methacrylic acid, methyl allyl alcohol polyoxyethylene ether (HPEG) and acrylamide (AM) are dissolved in the A deionized water that step (3) takes, put into reactor, then the hydrogen peroxide that step (3) takes is dissolved in B deionized water, the xitix that step (3) takes is dissolved in C deionized water, instilled respectively in reactor by peristaltic pump, control 4h drips off, after dripping 3h, add the polyester that step (3) takes, arranging temperature of reaction is 55 DEG C, insulation reaction 1h, the pH value to 8 of the NaOH regulation system finally using step (3) to take, i.e. obtained maleic anhydride graft type poly carboxylic acid plasticity-retention agent.
Maleic anhydride graft type poly carboxylic acid plasticity-retention agent obtained by embodiment 1 ~ 3 carries out flowing degree of net paste of cement test according to standard GB/T8077-2012, water is 87g, plasticity-retention agent addition content is that the 0.4%(folding of gelling material quality is solid), carry out test denseness, water retention according to standard GB/T25181-2010 premixing mortar; Cement mortar ratio: cement: sand: water: the mass ratio of plasticity-retention agent is 1.0:4.0:0.55:0.06; Blank cement mortar ratio: cement: sand: the mass ratio of water is 1.0:4.0:0.80.Above-mentioned cement is conch board PO42.5.Test data is in table 1.
Above-described embodiment made plasticity-retention agent wet mixing mortar performance test data mixed by table 1
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not limited by the examples; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (2)

1. a maleic anhydride graft type poly carboxylic acid plasticity-retention agent, is characterized in that the molecular structural formula of this maleic anhydride graft type poly carboxylic acid plasticity-retention agent is as follows:
；
Wherein, R, R 1, R 2and R 3for-H or-CH 3, M is Na +or K +, the span of a, b, c, d and m is the span of 5 ~ 10, n is 10 ~ 35.
2. the preparation method of maleic anhydride graft type poly carboxylic acid plasticity-retention agent as claimed in claim 1, is characterized in that concrete steps are:
(1) take raw material according to following mass percent: acetate 0.5 ~ 2.0%, vitriol 0.2 ~ 2.0%, maleic anhydride 5 ~ 10%, HPMC 2 ~ 10%, phosphorous acid 5 ~ 10% and glacial acetic acid 70 ~ 90%, the mass percent sum of described raw material is 100%;
(2) maleic anhydride, HPMC, phosphorous acid and glacial acetic acid that step (1) takes are put into reactor, be warming up to 60 ~ 100 DEG C, then add acetate and vitriol, continue reaction 4 ~ 6h, be cooled to room temperature after completion of the reaction, after drying obtained polyester;
(3) raw material is taken according to following mass percent: the polyester 0.1 ~ 1.0% that step (2) obtains, unsaturated acrylic monomer 1.0 ~ 5.0%, unsaturated polyoxyethylene polymeric monomer 15 ~ 25%, acrylamide monomers 0.1 ~ 1.0%, oxygenant 0.5 ~ 2.5%, reductive agent 0.5 ~ 2.5%, alkali 0.1 ~ 3.0%, three parts of deionized waters A, B and C, the mass percent of three parts of deionized waters is respectively 20 ~ 40%, 10 ~ 30% and 10 ~ 30%, and the mass percent sum of above-mentioned raw materials is 100%;
(4) by unsaturated acrylic monomer that step (3) takes, unsaturated polyoxyethylene polymeric monomer and acrylamide monomers are dissolved in the A deionized water that step (3) takes, put into reactor, then the oxygenant that step (3) takes is dissolved in B deionized water, the reductive agent that step (3) takes is dissolved in C deionized water, instilled respectively in reactor by peristaltic pump, control 3 ~ 5h to drip off, after dripping 2 ~ 4h, add the polyester that step (3) takes, arranging temperature of reaction is 40 ~ 70 DEG C, insulation reaction 1 ~ 2h, finally use pH value to 6 ~ 8 of alkali regulation system, i.e. obtained maleic anhydride graft type poly carboxylic acid plasticity-retention agent,
Described acetate is sodium-acetate or Potassium ethanoate;
Described vitriol is ferric sulfate or ferrous sulfate;
Described unsaturated acrylic monomer is one or more in methacrylic acid, vinylformic acid and maleic anhydride;
Described unsaturated polyoxyethylene polymeric monomer is one or more in acrylic ester, Methylacrylic Acid Polyoxyethylene Ester, allyl polyethenoxy ether, methyl allyl alcohol polyoxyethylene ether and isopentenol polyoxyethylene ether;
Described acrylamide monomers is one or both of acrylamide and Methacrylamide;
Described oxygenant is persulfuric acid by, one or both in Sodium Persulfate, Potassium Persulphate and hydrogen peroxide;
Described reductive agent is one or both in xitix, S-WAT, Sodium Pyrosulfite, sodium bisulfite and vitamins C;
Described alkali is NaOH or KOH.
CN201510952562.0A 2015-12-19 2015-12-19 Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof Pending CN105566572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510952562.0A CN105566572A (en) 2015-12-19 2015-12-19 Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510952562.0A CN105566572A (en) 2015-12-19 2015-12-19 Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof

Publications (1)

Publication Number Publication Date
CN105566572A true CN105566572A (en) 2016-05-11

Family

ID=55877251

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510952562.0A Pending CN105566572A (en) 2015-12-19 2015-12-19 Maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and preparation method thereof

Country Status (1)

Country Link
CN (1) CN105566572A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113999349A (en) * 2021-12-07 2022-02-01 科之杰新材料集团(海南)有限公司 Peaceful water reducing agent and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007186396A (en) * 2006-01-16 2007-07-26 Kao Corp Concrete admixture
CN102617061A (en) * 2012-03-21 2012-08-01 中建商品混凝土有限公司 Ultra retarder for concrete and preparation method for ultra retarder
CN102976657A (en) * 2012-12-04 2013-03-20 山东宏艺科技股份有限公司 Slushing agent for concrete and preparation method thereof
CN104945568A (en) * 2015-07-22 2015-09-30 贵州恒一新材料有限公司 Method for preparing maleic anhydride post-addition method low-temperature polycarboxylate superplasticizer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007186396A (en) * 2006-01-16 2007-07-26 Kao Corp Concrete admixture
CN102617061A (en) * 2012-03-21 2012-08-01 中建商品混凝土有限公司 Ultra retarder for concrete and preparation method for ultra retarder
CN102976657A (en) * 2012-12-04 2013-03-20 山东宏艺科技股份有限公司 Slushing agent for concrete and preparation method thereof
CN104945568A (en) * 2015-07-22 2015-09-30 贵州恒一新材料有限公司 Method for preparing maleic anhydride post-addition method low-temperature polycarboxylate superplasticizer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
何廷树等主编: "《土木工程材料(第2版)》", 31 January 2013, 中国建材工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113999349A (en) * 2021-12-07 2022-02-01 科之杰新材料集团(海南)有限公司 Peaceful water reducing agent and preparation method thereof

Similar Documents

Publication Publication Date Title
CN102976655B (en) Slump retaining polycarboxylic acid superplasticizer
CN104177562B (en) Slow-release high-adaptability polyester polycarboxylic acid water-reducing agent and preparation method and application thereof
CN105330193B (en) Nuclear power ultra dense real concrete polycarboxylate water-reducer and preparation method thereof
CN105037648B (en) It is a kind of to protect collapse water reducing type polycarboxylate water-reducer and its low-temperature rapid preparation method
CN109369860B (en) Slow-release controllable polycarboxylate superplasticizer mother liquor and preparation method thereof
CN104230203B (en) A kind of super sustained-release polycarboxylic slump retaining agent and preparation method thereof
CN108659177A (en) A kind of overlength sustained release slump retaining agent of high-adaptability and its normal low temperature preparation method
CN104119482A (en) Mud-resistant polycarboxylic acid water-reducing agent and preparation method thereof
CN105236806A (en) Phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and preparation method thereof
CN104371073A (en) Normal-temperature preparation method of slow-release polycarboxylic acid water reducing agent
CN104231188B (en) A kind of esters polycarboxylic acid slump retaining agent and preparation method thereof
CN108467215A (en) A kind of nanometer C-S-H crystal seeds early strength agent and preparation method for building concrete
CN108610455B (en) Concrete viscosity reducer and preparation method thereof
CN102351999A (en) Method for preparing nanoparticle water reducing agent
CN111592272A (en) Polycarboxylate superplasticizer for machine-made sand concrete prestressed component and preparation method thereof
CN104261722B (en) A kind of polycarboxylic acid slump retaining agent and preparation method thereof
CN109651566A (en) A kind of viscosity reduction type polycarboxylate water-reducer and preparation method thereof
CN108047393A (en) A kind of preparation method for enhancing viscosity reduction type polycarboxylic acids plasticiser
CN106242348A (en) A kind of polycarboxylic acids wet mixing mortar surely moulds agent
CN104193215B (en) Ternary block macromonomer graft copolymerization high-property polycarboxylic acid water-reducing agent and preparation method thereof
CN106519137A (en) Cross-star-shaped slow-release slump-retaining type polycarboxylic-acid water-reducing agent and preparation method thereof
CN102603223A (en) Polycarboxylic acid water reducer with solid raw materials and preparing process of the polycarboxylic acid water reducer
CN109824835B (en) Polycarboxylic acid water reducing agent and preparation method thereof
CN103772623B (en) Anti-chamotte mould cement water reducing agent and preparation method thereof
CN106699984B (en) A kind of lightweight aggregate floating inhibitor and preparation method thereof for lightweight aggregate concrete

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20160511