CN112920338B - Low-molecular-weight polymer for reinforced concrete and preparation method thereof - Google Patents
Low-molecular-weight polymer for reinforced concrete and preparation method thereof Download PDFInfo
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- CN112920338B CN112920338B CN202110129921.8A CN202110129921A CN112920338B CN 112920338 B CN112920338 B CN 112920338B CN 202110129921 A CN202110129921 A CN 202110129921A CN 112920338 B CN112920338 B CN 112920338B
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- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular 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
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- 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
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/166—Macromolecular compounds comprising sulfonate or sulfate groups obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention discloses a low molecular weight polymer for reinforced concrete and a preparation method thereof, wherein the polymer is prepared by polymerizing the following components in parts by mass according to 1000 parts by total mass of raw materials: 20-25 parts of alcohol monomer, 360-460 parts of epoxide, 10-15 parts of sulfonic acid monomer, 0.13-0.20 part of catalyst a, 0.10-0.14 part of catalyst b, 30-35 parts of acid small monomer, 1.1-3.0 parts of oxidant, 3.3-5.5 parts of reducing agent, 1.0-2.2 parts of chain transfer agent, 4.6-8.5 parts of neutralizer and the balance of water. The unsaturated intermediate with the molecular mass of about 400-600 is synthesized, and then the unsaturated intermediate and the acid small monomer are regulated and controlled by the initiator and the chain transfer agent under the constant temperature condition to prepare the enhanced low molecular weight polymer for the concrete.
Description
Technical Field
The invention belongs to the technical field of polycarboxylic acid polymers, and particularly relates to a low-molecular-weight polymer for reinforced concrete and a preparation method thereof.
Background
Along with the development of modern industry, the quality requirement of concrete buildings is higher and higher, a polycarboxylic acid polymer is one of five indispensable major components for forming high-performance concrete, and the polycarboxylic acid polymer is known as a third-generation concrete superplasticizer as a polyether macromonomer and a micromolecule monomer with a terminal double bond structure are copolymerized to form a high-molecular copolymer. The polycarboxylic acid slump retaining agent containing the polyether side chain has the advantages of environmental protection, high slump retaining, wide cement adaptability, large freedom degree in molecular structure and obvious concrete reinforcing effect, and can be successfully applied to projects such as highways, bridges, dams, tunnels, high-rise buildings and the like. In China, the polycarboxylic acid slump retaining agent is successfully applied to large-scale projects such as the three gorges dam, the Sutong bridge, the Jinghushi high-speed rail and the like, and remarkable results are obtained. With the rapid increase of the demand of concrete, but the main raw materials of the concrete, such as cement, fly ash and other cementing materials, have great geographical differences, the sources of sand and stone materials are diversified, the supply of high-quality raw materials is short, the content of impurities is high and the like. The concrete slump retaining agent has higher requirements on concrete additives, particularly high-performance slump retaining agents, the maximum effect of the polymer is that cement particles can be well dispersed, so that the hydration of cement is promoted, the water and cement are reduced while the slump loss is kept, the engineering quality is improved, and the slump loss is kept to have great influence on construction and concrete shrinkage.
Patent CN104860575A discloses a concrete synergist for resisting chloride ion corrosion, which comprises the following components of 60% -80% of bleeding resisting component, 3% -22% of impervious waterproof component, 4% -14% of reinforcing component, 0.4% -9% of dispersing component, 0.2% -3% of air entraining component and 0.8% -9.5% of matching component in percentage; the anti-bleeding component comprises polysaccharides and/or cellulose ether and/or polyacrylamide, the anti-bleeding and waterproof component comprises sodium methyl silicate and/or an organic silicon waterproof agent, the reinforcing component comprises ethylene glycol monoisopropanolamine, a composition of ethylene glycol monoisopropanolamine, triethanolamine and triisopropanol, the dispersing component comprises MF and/or TCL and/or NNO, the air-entraining component comprises sodium dodecyl benzene sulfonate and/or sodium dodecyl benzene sulfate, and the matching component comprises polyalcohol amine and polymeric polyalcohol. The invention also provides a production process of the concrete synergist for resisting chloride ion corrosion. The concrete has the effects of improving the strength of concrete, reducing the water seepage rate, reducing the slump loss and the like.
Patent CN105036587A discloses a high-performance concrete synergist, which is composed of the following raw materials by weight percent: 5-7% of dispersing component, 10-15% of enhancing component, 3-5% of active exciting component, 2-4% of complexing component and the balance of water. The invention also discloses a preparation method of the high-performance concrete synergist. The high-performance concrete synergist can effectively improve the workability of concrete mixtures, improve the strength of concrete and improve the comprehensive performance of concrete. On the premise of ensuring the strength of the concrete, the using amount of cement in the concrete can be reduced by 10%, and the use cost is reduced. On the premise of ensuring the strength of concrete, the admixture (fly ash and slag) can be used for replacing 40 percent of cement, so that the cost is obviously reduced. The high-performance concrete synergist has wide adaptability, obvious synergistic function and obvious economic and social benefits.
Patent CN106746856A discloses a concrete synergist, which is prepared from the following raw materials in parts by weight: 28-46 parts of triethanolamine, 10-22 parts of organic alcohol, 10-16 parts of potassium lignosulfonate, 5-11 parts of sodium ethylene diamine tetracetate, 1-7 parts of methacrylamide and 1-7 parts of glyceryl monostearate. The concrete synergist greatly improves the workability and the homogeneity of concrete, greatly reduces bleeding, has super-strong adaptability with various cements, and has good durability and frost resistance.
The invention provides a low molecular weight polymer for reinforced concrete, which is different from the above patents. The polymer with high dispersibility and low molecular weight is prepared under the auxiliary action of an initiator and the like after 2-ethoxy-3-butylene-1-alcohol reacts with propylene oxide to generate unsaturated intermediate monomers, the polymer can greatly improve the dispersion effect of cement particles, and can improve the hydration formation degree of the cement particles, improve the compactness of the hydration product of concrete and enhance the compressive strength and durability of the concrete while cooperating with a water reducing agent to improve the water reducing rate.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing a low-molecular-weight polymer for reinforced concrete and a preparation method thereof. According to the invention, 2-ethoxy-3-buten-1-ol reacts with propylene oxide to generate unsaturated polyether monomer, the 2-ethoxy-3-buten-1-ol has a methyl group, the methyl group can play a good dispersing role in the polymer, the dispersing performance of the polymer on cement particles is improved, the fluidity and the workability of concrete mortar are increased, a growth space is provided for cement products, and the generation of internal stress in concrete is reduced, so that the prepared polymer has good application potential and development prospect.
In order to solve the problems, the technical scheme of the invention is as follows:
the reinforced low molecular weight polymer for concrete is prepared by polymerizing the following components in parts by mass, wherein the total mass of the raw materials is 1000 parts: 20-25 parts of alcohol monomer, 360-460 parts of epoxide, 10-15 parts of sulfonic acid monomer, 0.13-0.20 part of catalyst a, 0.10-0.14 part of catalyst b, 30-35 parts of acid small monomer, 1.1-3.0 parts of oxidant, 3.3-5.5 parts of reducing agent, 1.0-2.2 parts of chain transfer agent, 4.6-8.5 parts of neutralizing agent and the balance of deionized water.
Further, the solid content of the low molecular weight polymer for reinforced concrete is 43-55%, and the optimal solid content is 46%.
Preferably, the alcohol monomer is 2-ethoxy-3-buten-1-ol.
Preferably, the epoxide is propylene oxide.
Preferably, the sulfonic acid monomer is difluoromethanesulfonic acid.
Preferably, the catalyst a is lithium aluminum hydride.
Preferably, the catalyst b is one or more of sodium hydroxide, potassium hydroxide and boron trifluoride vinyl ether, and most preferably the mass ratio of the potassium hydroxide to the boron trifluoride vinyl ether is 1:3.
Preferably, the acid small monomer is one or more than two of acrylic acid, fumaric acid, maleic anhydride, 2-ethylhexyl acrylate and methacryloyloxyethyl phthalate monoester, and the most preferred is acrylic acid and methacryloyloxyethyl phthalate monoester in a mass ratio of 1.
Preferably, the oxidant is one or more of 2,2' -azobis- (2,4-dimethylvaleronitrile), benzoyl Peroxide (BPO), and Ammonium Persulfate (APS), and most preferably Ammonium Persulfate (APS).
Preferably, the reducing agent is one or more of sodium hydrosulfite, ascorbic acid, sodium formaldehyde sulfoxylate, maltodextrin, sodium bisulfite and sodium metabisulfite, and the most preferred is ascorbic acid and sodium bisulfite with the mass ratio of 1.
Preferably, the chain transfer agent is one or more of sodium hypophosphite, mercaptopropionic acid, thioglycolic acid and sodium methallyl sulfonate, and the mass ratio of the mercaptopropionic acid to the thioglycolic acid is 1.
Preferably, the neutralizing agent is one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, sodium methoxide, sodium ethoxide, ethanolamine, diethanolamine, triethanolamine, and triisopropanolamine, and most preferably sodium methoxide and sodium ethoxide in a mass ratio of 1:3.
The preparation method of the polymer for the reinforced concrete comprises the following steps:
(1) Preparation of unsaturated intermediates
Adding 20-25 parts of alcohol monomer and 0.13-0.20 part of catalyst a into a high-pressure reaction kettle, then carrying out nitrogen replacement under stirring, starting heating, raising the temperature to 110-150 ℃, then starting to introduce 90-120 parts of epoxide into the reactor for induction reaction, raising the temperature to 110-125 ℃ in the induction process, maintaining the constant temperature state, maintaining the pressure at 0.15-0.60MPaG, keeping the temperature for 2-2.5 hours, when the pressure of the reactor does not decrease any more, adding 0.10-0.14 part of catalyst b again, introducing 270-340 parts of epoxide into the container and 10-15 parts of sulfonic acid monomer for induction reaction, maintaining the temperature at 125-150 ℃, when the pressure in the reaction container does not decrease any more, reducing the temperature to 100-110 ℃, carrying out vacuum-pumping degassing, and discharging to obtain an unsaturated intermediate with the molecular weight of 400-600.
(2) Polymer preparation
Adding the unsaturated intermediate prepared in the step (1) and water into a four-neck flask to be used as a bottom material, adding 30-35 parts of small acid monomer and water to be used as a material A, adding 1.0-2.2 parts of chain transfer agent, 3.3-5.5 parts of reducing agent and water to be prepared into a material B, and adding 1.1-3.0 parts of oxidizing agent and water to be prepared into a material C; heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with a bottom material, adding 1/4-1/2C material at one time, dropwise adding A material and B material at a constant speed, dropwise adding the A material for 2-3 hours, dropwise adding the B material for 2.5-3.5 hours, adjusting the pH value in the reaction kettle to 4-5 by using dilute sulfuric acid after the reaction is carried out for 1-1.5 hours, then adding the rest C material at one time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts, curing for 1-2 hours, and naturally cooling to obtain the low molecular weight polymer for the reinforced concrete. In the step, water in the preparation of the material A, the material B and the material C is used as a solvent to dissolve raw materials, and finally the total using amount of the water is replenished to 1000 parts.
Preferably, step (2) is: adding the unsaturated intermediate prepared in the step (1) and 200 parts of deionized water into a four-neck flask to serve as a bottom material, adding 120 parts of deionized water into 30-35 parts of acid small monomer to serve as a material A, adding 3.3-5.5 parts of reducing agent into 1.0-2.2 parts of chain transfer agent to serve as a material B, and adding 60 parts of deionized water into 1.1-3.0 parts of oxidizing agent to serve as a material C; heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with a bottom material, adding 1/3C material at one time, then dropwise adding A material and B material at a constant speed, dropwise adding the A material for 3 hours, dropwise adding the B material for 3 hours and 10 minutes, adjusting the pH value in the reaction kettle to 4-5 by using dilute sulfuric acid after the reaction is carried out for 1.2 hours, then adding the rest C material at one time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts, curing for 1 hour, and naturally cooling to obtain the low molecular weight polymer for the reinforced concrete.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the alcohol head used in the invention is 2-ethoxy-3-buten-1-ol, the 2-ethoxy-3-buten-1-ol has a methyl group, and the methyl group can play a good dispersing role in the polymer, thereby improving the dispersing performance of the polymer to cement particles, increasing the fluidity and the workability of concrete mortar, providing a growth space for cement products, reducing the generation of internal stress in concrete and ensuring the durability and the later strength of the concrete.
2. The invention has simple synthesis process and good controllability, and can control the change of polymerization rate in the whole reaction process by adjusting factors such as temperature, pressure, pH and the like in the reaction process, and carry out molecular structure and functional design to prepare the polymer with ideal performance.
Drawings
FIG. 1 is a TG-DSC image of a 28d concrete sample doped with ZN-2017-A concrete small material.
FIG. 2 is a TG-DSC of a 28d concrete sample incorporating the polymer obtained in example 1.
Detailed Description
The technical solutions and advantages of the present invention will be further described in detail with reference to specific examples, but it should be understood that the following examples should not be construed as limiting the scope of the claims of the present application in any way.
The low molecular weight polymer for the reinforced concrete is prepared by polymerizing the following components in parts by mass, wherein the total mass of the raw materials is 1000 parts: 20-25 parts of alcohol monomer, 360-460 parts of epoxide, 10-15 parts of sulfonic acid monomer, 0.13-0.20 part of catalyst a, 0.10-0.14 part of catalyst b, 30-35 parts of acid small monomer, 1.1-3.0 parts of oxidant, 3.3-5.5 parts of reducing agent, 1.0-2.2 parts of chain transfer agent, 4.6-8.5 parts of neutralizing agent and the balance of deionized water.
The preparation method of the low molecular weight polymer for the reinforced concrete comprises the following steps:
(1) Preparation of unsaturated intermediates
Adding 20-25 parts of alcohol monomer into a high-pressure reaction kettle, adding 0.13-0.20 part of catalyst a, then carrying out nitrogen replacement for 4 times under stirring, starting heating, raising the temperature to about 110-150 ℃, then starting to slowly introduce 90-120 parts of epoxide into the reactor for induction reaction, gradually raising the temperature to about 110-125 ℃ in the induction process, maintaining the constant temperature state, maintaining the pressure at 0.15-0.60MPaG, keeping the temperature for about 2-2.5 hours, adding 0.10-0.14 part of catalyst b again when the pressure of the reactor is not reduced, slowly introducing 270-340 parts of epoxide into the container and 10-15 parts of sulfonic acid monomer for induction reaction, maintaining the temperature at 125-150 ℃, reducing the temperature to 110 ℃ when the pressure of the reaction container is not reduced, vacuumizing, degassing, and discharging to obtain an unsaturated intermediate with the molecular weight of about 400-600.
(2) Polymer preparation
Adding the unsaturated intermediate prepared in the step (1) and 220 parts of deionized water into a four-neck flask to serve as a bottom material, adding 120 parts of deionized water into 30-35 parts of acid small monomer to serve as a material A, adding 3.3-5.5 parts of reducing agent and 50 parts of deionized water into 1.0-2.2 parts of chain transfer agent to serve as a material B, and adding 60 parts of deionized water into 1.1-3.0 parts of oxidizing agent to serve as a material C. Heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with base materials, adding 1/3C material at one time, then dropwise adding A material and B material at a constant speed, dropwise adding the A material for 2-3 hours, dropwise adding the B material for 2.5-3.5 hours, after the reaction is carried out for 1.2 hours, adjusting the pH value in the reaction kettle to 4-5 by using 30% dilute sulfuric acid, then adding the rest C material at one time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts of neutralizing agent, naturally cooling to room temperature for 1-2 hours, and obtaining the synthesized low molecular weight polymer solution for the reinforced concrete with the mass fraction (solid content) of 43-55%.
Example 1
The total mass parts of the raw materials for preparing the low molecular weight polymer for the reinforced concrete are 1000 parts, each mass part in the embodiment is 1g, and the mass parts of the raw materials are as follows: 25 parts of 2-ethoxy-3-butene-1-ol, 390 parts of propylene oxide, 13 parts of difluoromethanesulfonic acid, 0.13 part of lithium aluminum hydride, 0.12 part of potassium hydroxide, 35 parts of acrylic acid, 2.2 parts of ammonium persulfate, 4.5 parts of ascorbic acid, 1.2 parts of mercaptopropionic acid and mercaptoacetic acid in a mass ratio of 1:2, 5.4 parts of sodium hydroxide and the balance of deionized water.
The preparation method comprises the following specific operation steps:
(1) Preparation of unsaturated intermediates
Adding 25 parts of 2-ethoxy-3-buten-1-ol, adding 0.13 part of lithium aluminum hydride, stirring, performing nitrogen displacement for 4 times, starting heating, raising the temperature to about 120 ℃, then slowly introducing 90 parts of propylene oxide into the reactor to perform induction reaction, gradually raising the temperature to about 120 ℃ in the induction process, maintaining the constant temperature of 120 ℃, maintaining the pressure at 0.25MPaG relatively constant, keeping the temperature for about 2 hours, adding 0.12 part of potassium hydroxide again when the pressure of the reactor is not reduced, slowly introducing 300 parts of propylene oxide and 13 parts of difluoromethanesulfonic acid into the container to perform induction reaction, maintaining the temperature at 135 ℃, reducing the temperature to 110 ℃ when the pressure in the reactor is not reduced, vacuumizing, degassing, and discharging to obtain an unsaturated intermediate with the molecular weight of about 400-600.
(2) Polymer preparation
Adding the unsaturated intermediate prepared in the step (1) and 220 parts of deionized water into a four-neck flask to serve as a bottom material, adding 35 parts of acrylic acid and 120 parts of deionized water to serve as a material A, adding 1.2 parts of mercaptopropionic acid and thioglycolic acid with the mass ratio of 1:2, adding 4.5 parts of ascorbic acid and 50 parts of deionized water to prepare a material B, and adding 2.2 parts of ammonium persulfate and 60 parts of deionized water to prepare a material C. Heating a water bath kettle to 35 ℃, installing a four-neck flask filled with bottom materials, adding 1/3C material at one time, then dropwise adding A material and B material at a constant speed, dropwise adding the A material for 3 hours, dropwise adding the B material for 3.1 hours, adjusting the pH value in the reaction kettle to 5 by using 30% dilute sulfuric acid after the reaction is carried out for 1.2 hours, then adding the rest C material at one time, adding 5.4 parts of sodium hydroxide after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts, curing for 1 hour, and naturally cooling to room temperature to obtain the polymer solution with the mass fraction (solid content) of 40%.
Examples 2 to 6
The specific raw materials and the specific parameters (steps are the same) of the preparation methods of examples 2 to 6 are different from those of example 1, and are specifically as shown in tables 1 and 2 below (table 1 is the raw material, table 2 is the parameter of the preparation method), and the descriptions not shown in table 2 are the same as those of example 1.
TABLE 1
TABLE 2
The product of the invention and Qingdao Dingchang ZN-2017-A concrete are made into C50 concrete samples, and the following Table 3 is obtained through detection. (the maximum crack width of crack resistance of a flat plate method cracking test is detected according to the dynamic crack resistance standard in the JG/T157-2004 industry standard, the compressive strength is detected according to the standard GB/T _50107-2010, and the slump is tested according to the standard JTG E30-2005.)
TABLE 3
The 28d concrete sample (day 28 after the concrete slurry is filled into a mold) doped with ZN-2017-A concrete small material and the polymer obtained in the example 1 is subjected to TG-DSC detection. The results are shown in fig. 1 and 2, the chemical bound water content and the CH content in the net slurry can be obviously improved by the compound obtained in example 1, which shows that the compound of the invention can promote the hydration of portland cement and increase the yield of hydration products, and the chemical bound water content and the CH content in the net slurry test block are constantly increased along with the compound incorporation by comparing the chemical bound water content and the CH content of the ZN-2017-a concrete small material and the net slurry of the compound obtained in example 1, so that the strength of concrete is enhanced.
Claims (8)
1. A reinforced concrete polymer characterized by: the total mass of the raw materials is 1000 parts, and the raw materials are mainly polymerized from the following components: 20-25 parts of alcohol monomer, 10-15 parts of sulfonic acid monomer, 360-460 parts of epoxide, 0.13-0.20 part of catalyst a, 0.10-0.14 part of catalyst b, 30-35 parts of acid small monomer, 1.1-3.0 parts of oxidant, 3.3-5.5 parts of reducing agent, 1.0-2.2 parts of chain transfer agent, 4.6-8.5 parts of neutralizer and the balance of water;
the alcohol monomer is 2-ethoxy-3-butylene-1-alcohol;
the epoxide is propylene oxide;
the sulfonic acid monomer is difluoro methanesulfonic acid;
the catalyst a is lithium aluminum hydride;
the catalyst b is one or more than two of sodium hydroxide, potassium hydroxide and boron trifluoride vinyl ether;
the polymer for the reinforced concrete is obtained by a preparation method comprising the following steps:
(1) Preparation of unsaturated intermediates
Adding 20-25 parts of alcohol monomer and 0.13-0.20 part of catalyst a into a reaction kettle, then carrying out nitrogen replacement under stirring, starting heating, raising the temperature to 110-150 ℃, then starting to introduce 90-120 parts of epoxide into the reactor for induction reaction, raising the temperature to 110-125 ℃ in the induction process, maintaining the constant temperature state, maintaining the pressure constant at 0.15-0.60MPaG, keeping the temperature for 2-2.5 hours, adding 0.10-0.14 part of catalyst b again when the pressure of the reactor is not reduced, introducing 270-340 parts of epoxide into the container for induction reaction with 10-15 parts of sulfonic acid monomer, maintaining the temperature at 125-150 ℃, reducing the temperature to 100-110 ℃ when the pressure in the reaction container is not reduced, vacuumizing, discharging to obtain an unsaturated intermediate with the molecular weight of 400-600;
(2) Polymer preparation
Adding the unsaturated intermediate prepared in the step (1) and water into a four-neck flask to be used as a bottom material, adding 30-35 parts of small acid monomer and water to be used as a material A, adding 1.0-2.2 parts of chain transfer agent, 3.3-5.5 parts of reducing agent and water to be prepared into a material B, and adding 1.1-3.0 parts of oxidizing agent and water to be prepared into a material C; heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with a bottom material, adding 1/4-1/2C material at a constant speed, dropwise adding A material and B material at a constant speed for 2-3 hours, dropwise adding B material for 2.5-3.5 hours, adjusting the pH value in the reaction kettle to 4-5 by using dilute sulfuric acid after 1-1.5 hours of reaction, then adding the rest C material at a time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of A material and B material is finished, supplementing water to 1000 parts, curing for 1-2 hours, and naturally cooling to obtain the reinforced concrete polymer.
2. A reinforced concrete polymer according to claim 1, wherein: the acid small monomer is one or more than two of acrylic acid, fumaric acid, maleic anhydride, acrylic acid-2-ethylhexyl ester and methacryloyloxyethyl phthalic monoester.
3. A reinforced concrete polymer according to claim 1, wherein: the oxidant is one or more than two of azodiisobutyronitrile, 2,2' -azobis- (2,4-dimethylvaleronitrile), benzoyl peroxide and ammonium persulfate.
4. A reinforced concrete polymer according to claim 1, wherein: the reducing agent is one or more than two of sodium hydrosulfite, ascorbic acid, sodium formaldehyde sulfoxylate, maltodextrin, sodium hydrosulfite and sodium metabisulfite.
5. A reinforced concrete polymer according to claim 1, wherein: the chain transfer agent is one or more than two of sodium hypophosphite, mercaptopropionic acid, thioglycolic acid and sodium methallyl sulfonate.
6. A reinforced concrete polymer according to claim 1, wherein: the neutralizing agent is one or more than two of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, sodium methoxide, sodium ethoxide, ethanolamine, diethanolamine, triethanolamine and triisopropanolamine.
7. A method of producing a polymer for reinforced concrete according to any one of claims 1 to 6, wherein: the method comprises the following steps:
(1) Preparation of unsaturated intermediates
Adding 20-25 parts of alcohol monomer and 0.13-0.20 part of catalyst a into a reaction kettle, then carrying out nitrogen replacement under stirring, starting heating, raising the temperature to 110-150 ℃, then starting to introduce 90-120 parts of epoxide into the reactor for induction reaction, raising the temperature to 110-125 ℃ in the induction process, maintaining the constant temperature state, maintaining the pressure constant at 0.15-0.60MPaG, keeping the temperature for 2-2.5 hours, adding 0.10-0.14 part of catalyst b again when the pressure of the reactor is not reduced, introducing 270-340 parts of epoxide into the container for induction reaction with 10-15 parts of sulfonic acid monomer, maintaining the temperature at 125-150 ℃, reducing the temperature to 100-110 ℃ when the pressure in the reaction container is not reduced, vacuumizing, discharging to obtain an unsaturated intermediate with the molecular weight of 400-600;
(2) Polymer preparation
Adding the unsaturated intermediate prepared in the step (1) and water into a four-neck flask to be used as a bottom material, adding 30-35 parts of small acid monomer and water to be used as a material A, adding 1.0-2.2 parts of chain transfer agent, 3.3-5.5 parts of reducing agent and water to be prepared into a material B, and adding 1.1-3.0 parts of oxidizing agent and water to be prepared into a material C; heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with a bottom material, adding 1/4-1/2C material at one time, then dropwise adding A material and B material at a constant speed, dropwise adding the A material for 2-3 hours, dropwise adding the B material for 2.5-3.5 hours, adjusting the pH value in the reaction kettle to 4-5 by using dilute sulfuric acid after the reaction is carried out for 1-1.5 hours, then adding the rest C material at one time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts, curing for 1-2 hours, and naturally cooling to obtain the reinforced concrete polymer.
8. The method for preparing a polymer for reinforced concrete according to claim 7, wherein: the step (2) is as follows: adding the unsaturated intermediate prepared in the step (1) and 200 parts of deionized water into a four-neck flask to serve as a bottom material, adding 120 parts of deionized water into 30-35 parts of acid small monomer to serve as a material A, adding 3.3-5.5 parts of reducing agent into 1.0-2.2 parts of chain transfer agent to serve as a material B, and adding 60 parts of deionized water into 1.1-3.0 parts of oxidizing agent to serve as a material C; heating a water bath kettle to 35-45 ℃, installing a four-neck flask filled with a bottom material, adding 1/3C material at one time, then dropwise adding A material and B material at a constant speed, dropwise adding the A material for 3 hours, dropwise adding the B material for 3 hours and 10 minutes, adjusting the pH value in the reaction kettle to 4-5 by using dilute sulfuric acid after the reaction is carried out for 1.2 hours, then adding the rest C material at one time, adding 4.6-8.5 parts of neutralizing agent after the dropwise adding of the A material and the B material is finished, replenishing water to 1000 parts, curing for 1 hour, and naturally cooling to obtain the reinforced concrete polymer.
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