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36results about How to "Controllable molecular structure" patented technology
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Block poly-carboxylic acid concrete high-efficiency water reducing agent and preparation method thereof
ActiveCN103482897AControl structureControl its molecular weight distributionStructural regularityPolymer science
The invention provides a block poly-carboxylic acid concrete high-efficiency water reducing agent with an ordered structure and a preparation method thereof. The block poly-carboxylic acid is prepared by using atom transfer radical polymerization, the structural regularity and the molecular weight distribution of the poly-carboxylic acid are controlled effectively, and the water reducing agent is used in a cement dispersing process. By adoption of the block poly-carboxylic acid concrete high-efficiency water reducing agent and the preparation method thereof, the problems of uncontrollable molecular weight of the poly-carboxylic acid, wider molecular weight distribution, un-designable molecular structure and the like are solved.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Fluorine-containing waterproofing agent for textiles and method for preparing same
ActiveCN102634980AImprove regularityImprove performanceFibre treatmentAtom-transfer radical-polymerizationFluorocarbon
The invention provides a fluorine-containing waterproofing agent for textiles and a method for preparing the same, belonging to the chemical material field. A self-emulsifying fluorine-containing acrylate block copolymer is synthesized by means of ARGETATRP (Activators Regenerated by Electron Transfer for Atom Transfer Radical Polymerization); and the self-emulsifying fluorine-containing acrylate block copolymer can be directly used after being emulsified and diluted. The self-emulsifying fluorine-containing acrylate block copolymer prepared by the method has excellent pH stability, chemical stability, diluting stability and storage stability; and the fluorine-containing structure units are distributed in form of blocks on the polymeric chain of the fluorine-containing acrylate block copolymer so that the fluorine-containing chain segments can be effectively utilized. Compared with a random fluorocarbon resin, the fluorine-containing acrylate block copolymer is capable of achieving the same performance and the usable amount of fluorine-containing monomers is very low. Moreover, textiles finished by the fluorine-containing waterproofing agent have excellent waterproofness; and compared with the similar products, the fluorine efficiency is improved and the cost is reduced.
Owner:京准化工技术(上海)有限公司
Three-arm efficient polycarboxylic acid water reducing agent and preparation method thereof
InactiveCN106084157AReveal molecular structureReveal the relationship between its performanceChemical structureAcid water
The invention relates to a three-arm efficient water reducing agent and a preparation method thereof, and belongs to the technical field of building concrete additives. The efficient water reducing agent is prepared through the step that an AB-type double-block copolymer of a three-arm structure is obtained through step-by-step polymerization by adopting three atom transferring radical polymerization reaction steps. The water reducing agent has the advantages of being controllable in chemical structure and molecular weight, narrow in molecular weight distribution and simple in process, is high in water reducing rate and good in slump retaining property, can obviously improve the concrete flowability and is low in sensitivity degree to mud. Compared with a traditional comb-shaped polycarboxylic water reducing agent, the problems that the polycarboxylic water reducing agent is sensitive to the mud in concrete, and the performance is reduced due to existence of the mud can be solved to a certain degree, and the three-arm efficient water reducing agent is especially suitable for the concrete with the high mud content.
Owner:UNIV OF JINAN
Star-like amphoteric polycarboxylate superplasticizer with efficient anti-mudding function and preparation method thereof
The invention discloses a star-like amphoteric polycarboxylate superplasticizer with efficient anti-mudding function and a preparation method thereof; the preparation method comprises: esterifying Beta-cyclodextrin and a dithioester compound with acyl halide groups to obtain star-structure reversible addition-fragmentation chain transfer agent (RAFT agent), initiating RAFT polymerization of (methyl)polyethylene glycol diacrylate, (methyl)acrylic acid and (methyl)acryloyloxyethyl trimethyl ammonium chloride under the action of the chain transfer agent and an initiator to obtain star-like amphoteric copolymer, and carrying out further processing to obtain the star-like amphoteric polycarboxylate superplasticizer having a solid content of 20% and efficient anti-mudding function. The polycarboxylate superplasticizer prepared herein has high water-reducing rate and efficient ant-mudding function and may meet high construction requirements.
Owner:SHANDONG JIAOTONG UNIV
Method for preparing diethanol isopropanol amine
InactiveCN103224453AControllable molecular structureControl molecular structureOrganic compound preparationAmino-hyroxy compound preparationPropylene oxideDiethanolamine
The present invention discloses a method for preparing diethanol isopropanol amine, which is obtained by the reaction of mixing diethanolamine, propylene oxide and water in a reactor; in the invention, the conventional synthesis reaction of liquid ammonia, ethylene oxide and propylene oxide is not adopted, but the creative reaction of diethanolamine, which is taken as the raw material, and propylene oxide is adopted to obtain the product. The advantages are as following: 1. high yield and short reaction time; 2. mild reaction condition, controllable process, and controllable molecular structure of the product by replacing an active position with propylene oxide on an ammonia molecule; 3. the smell, color and reaction time of the product better than using ammonia by taking high-content diethanolamine as raw material; 4. lower cost than using ammonia, and that makes the product more competitive.
Owner:NINGBO LIANKAI CHEM
Long-chain alkyl phenyl fluorosilicone oil and preparation method thereof
The invention discloses long-chain alkyl phenyl fluorosilicone oil and a preparation method thereof. The preparation method comprises the following steps: under the protection of inert gas, a self-made polyfunctional group substituted hybrid siloxane ring body is used as a reaction raw material, a corresponding end-capping reagent is added, and a strong acid or strong base ring-opening reaction is carried out to prepare high-molecular-weight long-chain alkyl phenyl fluorosilicone oil. The preparation method is low in cost and mild in reaction condition, the molecular structure and organic group content of the product are easy to control, the organic group in the synthesized product is more uniform in distribution, the synthesized product is low in viscosity and good in heat resistance, and the lubricating property requirements within a wide temperature range are met; at the same time, the long-chain alkyl phenyl fluorosilicone oil can be used as an additive and used in a compounding manner with the synthetic oil or mineral oil, so that the lubricating properties of the synthetic oil or mineral oil are improved.
Owner:ZHEJIANG UNIV
Star-shaped amphoteric polycarboxylate superplasticizer and preparation method thereof
The invention discloses a star-shaped amphoteric polycarboxylate superplasticizer and a preparation method thereof. The method includes: esterfying cyclodextrin to obtain a star-shaped initiator, initiating atom transfer radical polymerization of (methyl) polyethylene glycol acrylate, (methyl) sodium acrylate, (methyl) acryloyloxyethyl trimethyl ammonium chloride and (methyl) hydroxylethyl acrylate to obtain a star-shaped copolymer of the four monomers, and conducting further treatment to obtain a star-shaped amphoteric polycarboxylate superplasticizer with a solid content of 20%. The polycarboxylate superplasticizer prepared by the method provided by the invention has high water reducing rate and good mud resistance, meets high construction requirements, and has good application prospect.
Owner:SHANDONG JIAOTONG UNIV
Method for preparing water-soluble graft polymers based on active/controllable radical polymerization
The invention discloses a method for preparing water-soluble graft polymers through active / controllable radical polymerization. The method can be used for controllable radical polymerization of various water-soluble monomers of a (methyl) acrylamide monomer, (methyl) acrylic acid, (methyl) acrylate and the like, so as to prepare the water-soluble graft polymers with different molecular weights. The preparation method is particularly realized through the following steps: firstly, preparing a water-soluble polyfunctional macroinitiator by adopting a chemical modification manner; secondly, initiating active / controllable radical polymerization of the water-soluble monomers by the macroinitiator under the heating or visible light / ultraviolet light irradiation condition, and preparing the molecular weight and chemical constitution controllable water-soluble graft polymers. The method is simple in synthetic route, low in production cost and safe and convenient to operate; the prepared macroinitiator is high in dissolution rate in water phase and high in initiating activity, and can be used for preparing the chemical constitution and molecular weight controllable water-soluble graft polymers.
Owner:BEIJING UNIV OF CHEM TECH
High molecular weight unsaturated polyether macromonomer, and preparation method and application thereof
The invention provides a high molecular weight unsaturated polyether macromonomer which is characterized in that the polyether macromonomer is at a liquid state at normal temperature, and the structural formula (I) thereof is expressed in the specification, wherein R<1> is same or different, and represents a hydrogen atom or alkyl with 1-20 carbon atoms; R<2> represents alkyl with 1-20 carbon atoms; R<3> represents alkyl or carbonyl with 1-10 carbon atoms; R<5> represents a hydrogen atom or alkyl with 1-20 carbon atoms; R<4>O is different, and represents oxyalkenyl with 2-18 carbon atoms; n represents the average addition mole number of the oxyalkenyl, and 5<=n<=300; and X, Y and Z are same or different, and represent -N, -O or H. By optimally designing the molecular structure, the high molecular weight unsaturated polyether macromonomer provided by the invention ensures the liquid state thereof at normal temperature while the molecular polymerization reaction activity is ensured. Besides, a preparation method of the high molecular weight unsaturated polyether macromonomer provided by the invention is simple, and the conditions are easy to control; and the product does not need slicing post-treatment, the production cost is low, and the economic benefits are increased.
Owner:联泓(江苏)新材料研究院有限公司
Preparation method of epoxy chloropropane toughened high-ortho phenolic fiber
InactiveCN103469342AImprove flexibilityLow viscosityMonocomponent synthetic polymer artificial filamentMelt spinning methodsEpoxyPressure reduction
A preparation method of an epoxy chloropropane toughened high-ortho phenolic fiber comprises the following steps of heating phenol, methanal, zinc acetate and epoxy chloropropane to boiling for reaction, adding concentrated sulfuric acid for boiling and reaction continuously, washing with high-temperature water, cooling, continuously heating up during pressure reduction and dehydration, obtaining epoxy chloropropane toughened high-ortho phenolic resin, performing melt spinning on the epoxy chloropropane toughened phenolic resin, drawing to form a high-ortho phenolic fiber filament, heating, curing and crosslinking the high-ortho phenolic fiber filament in a coagulating bath containing methanal and HC1, and obtaining the epoxy chloropropane toughened high-ortho phenolic fiber. Compared with the prior art, the method has the advantages of simple and practicable reaction, good spinnability of a stock solution, high curing rate and high mechanical properties.
Owner:ZHONGYUAN ENGINEERING COLLEGE
Semi-aromatic polyamide polyester copolymer and preparation method thereof
The invention provides a semi-aromatic polyamide polyester copolymer, which is characterized in that: the structural formula of the semi-aromatic polyamide polyester copolymer is (AB)n, wherein m1 is an integer from 1 to 500; m2 is an integer from 1 to 500; and n is an integer from 10 to 500. The invention also provides a method for preparing the semi-aromatic polyamide polyester copolymer. The semi-aromatic polyamide polyester copolymer has high heat resistance, water absorbability and mechanical properties; and the preparation method is simple, molecular structures are controllable, a few side reactions are carried out, and the conversion rate of the product is high.
Owner:BYD CO LTD
Preparation method of monoethanol diisopropanolamine
InactiveCN103242175AControllable molecular structureControl molecular structureOrganic compound preparationAmino-hyroxy compound preparationLiquid ammoniaDiisopropanolamine
The invention discloses a preparation method of monoethanol diisopropanolamine. The monoethanol diisopropanolamine is prepared by mixing and reacting diisopropanolamine and epoxyethane in a reaction kettle. The method does not adopt the traditional synthesis reaction of liquid ammonia with epoxyethane and epoxypropane, but creatively reacts the raw material diisopropanolamine with epoxyethane to obtain the product. The invention has the advantages of high yield, short reaction time, mild reaction conditions and controllable process; one active position on the ammonia molecule is substituted by epoxyethane, so that the molecular structure of the product can be controlled more easily; and by using the high-content diisopropanolamine as the raw material, the product has better smell, color and reaction time than that of an ammonia process.
Owner:NINGBO LIANKAI CHEM
Polyquinoline polymer material and preparation method thereof
InactiveCN107880265AImprove solubilityMild reaction conditionsLuminescent compositionsPolymer scienceFiltration
The invention relates to a polyquinoline polymer material and a preparation method thereof, and belongs to the field of polymer material preparation. The structural formula of the polymer is shown indescription, wherein R1 refers to an aromatic ring functional group without strong electron absorption, R2 refers to an aliphatic functional group and n refers to an integer selected from 3 to 80. Thepreparation method of the polyquinoline polymer material includes the following steps that, an alkyne-aldehyde derivative monomer, an aniline derivative monomer, a catalyst and a solvent are added ina reaction container, reaction is conducted at 80-120 DEG C for 12-48 minutes, the mixture is cooled to the room temperature, and an intermediate product is obtained; the intermediate product is added in a precipitation agent to obtain a precipitate, filtration and drying are conducted, and the polyquinoline polymer material is obtained. The polymer is directly obtained by one step, no metal catalysts are needed in the reaction process, the reaction condition is mild, the strict water-free and oxygen-free condition is not needed, operation is simple, and the material is easy to synthesize.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Preparation method for spherical polyelectrolyte brush doped conductive polymer
The invention relates to a preparation method for a spherical polyelectrolyte brush doped conductive polymer nanocomposite material. The method comprises the following steps: preparing a spherical polyelectrolyte brush by surface-initiated polymerization, then introducing to a polymerization system, using an in-situ chemical oxidative polymerization to obtain the spherical polyelectrolyte brush doped nano conductive composite material. The prepared nano conductive composite material has the characteristics of high conductivity, good treatment performance, and simple and convenient operation process.
Owner:WUHAN UNIV
Preparation method of three-arm block polycarboxylic acid water reducing agent
InactiveCN108585588AReveal molecular structureReveal the relationship between its performanceChemical structureBenzoyl bromide
The invention discloses a preparation method of a three-arm block polycarboxylic acid water reducing agent. The preparation method comprises that triol, an alkali, CS2 and benzyl bromide in a molar ratio of 1: 3-4: 2-5: 2-7 undergo a reaction to produce a three-arm chain transfer agent, under the action of the three-arm chain transfer agent and an initiator, isoamyl alcohol polyoxyethylene ether and acrylic acid undergo an RAFT polymerization reaction to produce a three-arm block compolymer, and the compolymer is treated to form the three-arm block polycarboxylic acid water reducing agent. Thewater reducing agent has a controllable chemical structure, controllable molecular weight, narrow molecular weight distribution, simple processes, a high water-reducing rate and good moisture retention effects, can obviously improve concrete fluidity, has low sensitivity to mud, can meet higher construction requirements and has broad application prospects.
Owner:UNIV OF JINAN
Hyperbranched organosilicon foam stabilizer and its preparation method and application
The invention discloses a hyperbranched organosilicon foam stabilizer and its preparation method and application, and relates to the technical field of foam stabilizer preparation. The preparation method of a hyperbranched organosilicon foam stabilizer comprises: alkoxy-terminated hyperbranched polysiloxane Alkane reacts with a hydroxyl-terminated polyether to obtain a hyperbranched organosilicon foam stabilizer, and the structural formula of the polysiloxane segment of the alkoxy-terminated hyperbranched polysiloxane is [(CH 3 ) 2 SiO] m [CH 3 C 6 h 5 SiO] n [CH 3 CH 2 CH 2 CF 3 SiO] P , where m, n and p are all integers, and m=8‑50, n=0‑12, p=0‑6, 0≤(n+p) / (m+n+p)≤0.25, 0≤ p / (m+n+p)≤0.1. The hyperbranched organosilicon foam stabilizer is prepared by the above method. The foam stabilizer has a high degree of polymerization, the molecular structure of the hyperbranched chain segment is controllable, and the molecule is adjustable. It is especially suitable for the slow rebound foam system formulation.
Owner:JIANGSU MAYSTA CHEM
A kind of H-type polymer and preparation method thereof
ActiveCN108178819BControllable molecular structureMolecular weight controllableEndcappingPolymer science
The invention relates to the field of polymers and discloses an H-shaped polymer and a preparation method thereof. The method for preparing the H-shaped polymer comprises the following steps: (1) a first monomer is subjected to bidirectional anionic polymerization in the presence of a double anion initiator and a solvent, an end-capping reaction is performed with an epoxy compound, dihalo acyl halide is added for an acylation reaction, and a prepolymer is obtained; (2) in the presence of a catalyst and a complexing agent, the prepolymer is used for initiating an active free radical polymerization reaction of a second monomer. The H-shaped polymer with controllable molecular structure and controllable molecular weight can be prepared through conversion from bidirectional anionic polymerization to the active free radical polymerization reaction.
Owner:CHINA PETROLEUM & CHEM CORP +1
A temperature-resistant and salt-resistant multi-component copolymer and its preparation method and application
ActiveCN109796954BInitiation efficiency is highHigh priming activityDrilling compositionUltraviolet lightsPolymer solution
The invention discloses a preparation method of a temperature-resistant and salt-resistant soluble multi-component copolymer: (1) Mixing a temperature-resistant water-soluble polymer solution and a photoinitiator solution, adding a water-soluble monomer, mixing, passing an inert gas to remove oxygen , and then placed under ultraviolet light for 10 to 30 minutes, and the light intensity was set to 500 to 10000 μW / cm 2 ; That is, a temperature-resistant multifunctional macromolecular initiator; (2) Dissolving the temperature-resistant multifunctional macromolecular initiator in water, then adding monomers, passing an inert gas to remove oxygen; Living / controllable radical polymerization of water-soluble monomers to obtain temperature-resistant and salt-resistant multi-polymers. The temperature-resistant and salt-resistant multi-component copolymer of the present invention has an ultra-high molecular weight of 1.9×10 7 Above, and temperature-resistant, salt-resistant, it can be used to increase the viscosity of aqueous solution under high-temperature and high-salinity conditions, and can be used as an oil displacement agent for tertiary oil recovery under high-temperature and high-salinity geological conditions to enhance oil recovery.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for synthesizing brush-like polymers based on poly(n-heterocyclic carbene) structure self-catalyzed self-initiated ring-opening and the prepared brush-like polymers
ActiveCN107057047BHigh graft densityModerate molecular weight distributionPolymer sciencePtru catalyst
The invention discloses a method based on autocatalysis self-initiation ring opening of a poly(N-heterocylic carbene) structure to synthesize a brush polymer. The method includes: under inert gas shielding, adding annular monomer capable of being in ring opening polymerization under catalytic action of N-heterocylic carbene into an organic solution containing poly(N-heterocylic carbene), wherein a molar ratio of poly(N-heterocylic carbene) repetitive unit to at least one annular monomer is 1:1-1000, reaction temperature is minus 80 DEG C-120 DEG C, and reaction time is 10s-48h. The invention further discloses the brush polymer of a poly(N-heterocylic carbene) carbon dioxide adduct structure obtained by adding carbon dioxide to terminate reaction in the method. More brush polymers various in structure can be obtained by repeating the method. The method is simple in step, an initiator is not needed, a catalyst is metal-free, and the obtained polymer is narrow in molecular weight distribution, controllable in structure, high in grafting density and wide in application range.
Owner:SICHUAN UNIV
A kind of high molecular weight unsaturated polyether macromonomer and its preparation method and application
Owner:联泓(江苏)新材料研究院有限公司
Fluorosurfactant and its preparation method and application
ActiveCN111111550BThe preparation method is efficient and safeControllable molecular structureOrganic compound preparationTransportation and packagingActive agentAcrylate ester
The invention discloses a fluorine-containing surfactant and its preparation method and application. The preparation method of the surfactant is to react a fluorocarbon acrylate compound with an amine compound and then react with an acid anhydride to obtain a fluorine-containing surfactant. Chain surfactants, this reaction can prepare a new type of fluorosurfactant containing 1 to 3 fluorocarbon chains by using different unit amines, diamines and triamines. This new type of surfactant has excellent The characteristics of reducing the surface tension of the liquid, the preparation method has the advantages of easy to obtain raw materials, easy structure control, high reaction yield and good product characteristics. At the same time, the preparation method avoids the use of phosphorus oxychloride or phosphorus trichloride. Pollution and high-risk chemical materials reduce the threshold for the preparation of fluorine-containing surfactants, no by-products are eliminated during the reaction process, and production equipment will not be corroded, which is especially helpful for industrial production.
Owner:江门市华熊新材料有限公司
A kind of long-chain alkylphenyl fluorosilicone oil and its preparation method
The invention discloses long-chain alkyl phenyl fluorosilicone oil and a preparation method thereof. The preparation method comprises the following steps: under the protection of inert gas, a self-made polyfunctional group substituted hybrid siloxane ring body is used as a reaction raw material, a corresponding end-capping reagent is added, and a strong acid or strong base ring-opening reaction is carried out to prepare high-molecular-weight long-chain alkyl phenyl fluorosilicone oil. The preparation method is low in cost and mild in reaction condition, the molecular structure and organic group content of the product are easy to control, the organic group in the synthesized product is more uniform in distribution, the synthesized product is low in viscosity and good in heat resistance, and the lubricating property requirements within a wide temperature range are met; at the same time, the long-chain alkyl phenyl fluorosilicone oil can be used as an additive and used in a compounding manner with the synthetic oil or mineral oil, so that the lubricating properties of the synthetic oil or mineral oil are improved.
Owner:ZHEJIANG UNIV
A kind of preparation method of water-soluble graft polymer based on living/controllable radical polymerization
The invention discloses a method for preparing water-soluble graft polymers through active / controllable radical polymerization. The method can be used for controllable radical polymerization of various water-soluble monomers of a (methyl) acrylamide monomer, (methyl) acrylic acid, (methyl) acrylate and the like, so as to prepare the water-soluble graft polymers with different molecular weights. The preparation method is particularly realized through the following steps: firstly, preparing a water-soluble polyfunctional macroinitiator by adopting a chemical modification manner; secondly, initiating active / controllable radical polymerization of the water-soluble monomers by the macroinitiator under the heating or visible light / ultraviolet light irradiation condition, and preparing the molecular weight and chemical constitution controllable water-soluble graft polymers. The method is simple in synthetic route, low in production cost and safe and convenient to operate; the prepared macroinitiator is high in dissolution rate in water phase and high in initiating activity, and can be used for preparing the chemical constitution and molecular weight controllable water-soluble graft polymers.
Owner:BEIJING UNIV OF CHEM TECH
H-shaped polymer and preparation method thereof
The invention relates to the field of polymers and discloses an H-shaped polymer and a preparation method thereof. The method for preparing the H-shaped polymer comprises the following steps: (1) a first monomer is subjected to bidirectional anionic polymerization in the presence of a double anion initiator and a solvent, an end-capping reaction is performed with an epoxy compound, dihalo acyl halide is added for an acylation reaction, and a prepolymer is obtained; (2) in the presence of a catalyst and a complexing agent, the prepolymer is used for initiating an active free radical polymerization reaction of a second monomer. The H-shaped polymer with controllable molecular structure and controllable molecular weight can be prepared through conversion from bidirectional anionic polymerization to the active free radical polymerization reaction.
Owner:CHINA PETROLEUM & CHEM CORP +1
Perfluoroether-based polysiloxane and its preparation method and application
ActiveCN106883410BGood flexibilityGood viscosity-temperature characteristicsAdditivesBase-materialsPolymer sciencePerfluoroether
Owner:YICHANG COLLIN SILICON MATERIAL CO LTD
A star-shaped amphoteric polycarboxylate water reducer with high-efficiency mud resistance and its preparation method
Owner:SHANDONG JIAOTONG UNIV
A kind of preparation method and application of low viscosity polyether type hyperbranched epoxy resin
ActiveCN111944120BControllable molecular structureReduce viscosityAnti-corrosive paintsPolyether coatingsBenzoic acidPolymer science
Owner:JIANGNAN UNIV
Preparation method of epichlorohydrin toughened high ortho phenolic fiber
InactiveCN103469342BImprove flexibilityLow viscosityMonocomponent synthetic polymer artificial filamentMelt spinning methodsZinc Acetate DihydratePressure reduction
A preparation method of an epoxy chloropropane toughened high-ortho phenolic fiber comprises the following steps of heating phenol, methanal, zinc acetate and epoxy chloropropane to boiling for reaction, adding concentrated sulfuric acid for boiling and reaction continuously, washing with high-temperature water, cooling, continuously heating up during pressure reduction and dehydration, obtaining epoxy chloropropane toughened high-ortho phenolic resin, performing melt spinning on the epoxy chloropropane toughened phenolic resin, drawing to form a high-ortho phenolic fiber filament, heating, curing and crosslinking the high-ortho phenolic fiber filament in a coagulating bath containing methanal and HC1, and obtaining the epoxy chloropropane toughened high-ortho phenolic fiber. Compared with the prior art, the method has the advantages of simple and practicable reaction, good spinnability of a stock solution, high curing rate and high mechanical properties.
Owner:ZHONGYUAN ENGINEERING COLLEGE
A kind of polycarboxylate superplasticizer with high water reduction and high slump retention and preparation method thereof
The invention discloses a high water reducing and high slump retention type polycarboxylate water reducing agent. A copolymer formed by atom transfer radical polymerization; the ligand is one of trimethylolpropane phosphite, bis(triphenylphosphine) nickel dibromide or trimethylolpropane sulfite Two or three of phosphate ester, bis(triphenylphosphine)nickel dibromide, and bis(diphenylphosphine)methane. The invention adopts ATRP atomic free radical polymerization reaction, so that the relative molecular weight distribution of the polymer is reasonable, and at the same time, various functional group structures such as unsaturated alkyl ester groups, acid anhydride groups and anti-mudging groups are introduced, which greatly improves the reduction of Compared with conventional ligands, the selected ligand can stabilize the catalyst well, promote the reaction to proceed, stabilize the intermediate transition state of the reaction, and reduce the generation of by-products.
Owner:WUHAN YUANJIN BUILDING MATERIALS TECH CO LTD
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