CN114716621A - Normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor and preparation method thereof - Google Patents
Normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor and preparation method thereof Download PDFInfo
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- CN114716621A CN114716621A CN202210226554.8A CN202210226554A CN114716621A CN 114716621 A CN114716621 A CN 114716621A CN 202210226554 A CN202210226554 A CN 202210226554A CN 114716621 A CN114716621 A CN 114716621A
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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
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
- C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
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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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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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
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor and a preparation method thereof, belonging to the technical field of water reducers. Comprises a material A, a material B, a material C and a bottom material, wherein: the material A is prepared by dissolving acrylic acid in water; the material B is prepared by dissolving hydroxyethyl acrylate and vitamin C in water; the material C is prepared by dissolving sodium hydroxide in water; the bottom material is prepared by dissolving six-carbon macromonomer, hydrogen peroxide, sodium hypophosphite and ferrous sulfate in water; and adding the material A and the material B into the base material, and after the reaction is completed, adding the material C to prepare the polycarboxylate superplasticizer mother solution. The water reducing street mother liquor prepared by the invention has the advantages of strong comprehensive performance and low production energy consumption.
Description
Technical Field
The invention belongs to the technical field of water reducing agents, and relates to normal-temperature six-carbon comprehensive polycarboxylate water reducing agent mother liquor and a preparation method thereof.
Background
The concrete is a building material with the widest application range, can not be replaced by other materials in the engineering field, and is a seven-component novel building material established on the basis of two scientific and technical developments of a polycarboxylic acid water reducing agent and a mineral admixture at present. With the development of national economy. There are many changes in the concrete industry that are also placing higher demands on our concrete. The changes in the industry at present are mainly as follows:
(1) the concrete raw materials are increasingly deficient, the material performance is unstable, and the quality fluctuation is large. For example, the natural sand resources are forbidden to be exploited, the mechanical sand performance is unstable, and the like, and the changes bring great influence to the concrete industry. In addition to the change of the varieties of the raw materials, the quality of the raw materials of the concrete is also changed, the raw materials are different in regions and manufacturers, the quality of each raw material is also different, and even the quality of the raw materials produced by the same manufacturer fluctuates.
(2) The emergence of complex structures and high-rise super high-rise building structures puts higher requirements on the performance strength, workability and durability of concrete. Such as the application of superplastic and high-strength concrete at present, the requirements of concrete technicians are higher.
In order to solve the problems caused by the changes, the concrete water reducing agent is also updated, the prior aliphatic series and naphthalene series are transited to the polycarboxylic acid series which is widely applied at present, for example, although the polycarboxylic acid admixture has good comprehensive performance, when the concrete water reducing agent is used for complicated and variable ground materials, a special formula is required to be made to deal with the problems caused by the changed raw material market.
Disclosure of Invention
The invention provides a normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor and a preparation method thereof, aiming at solving the problems of single performance and high production energy consumption of the traditional mother liquor.
The invention is realized by the following technical scheme:
a normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor comprises a material A, a material B, a material C and a base material, wherein:
the material A is prepared by dissolving acrylic acid in water;
the material B is prepared by dissolving hydroxyethyl acrylate and vitamin C in water;
the material C is prepared by dissolving sodium hydroxide in water;
the bottom material is prepared by dissolving a six-carbon macromonomer, hydrogen peroxide, sodium hypophosphite and ferrous sulfate in water; and adding the material A and the material B into the base material, and after the reaction is completed, adding the material C to prepare the polycarboxylate superplasticizer mother solution.
Further, the six-carbon macromonomer is vinyl polyoxyethylene ether.
Further, the material A is prepared by dissolving 2-3 parts by mass of acrylic acid in 6-8 parts by mass of water.
Further, the material B is prepared by dissolving 0.6-1.2 parts of hydroxyethyl acrylate and 0.05-0.1 part of vitamin C in 6-8 parts of water in parts by mass.
Further, after the vitamin C is dissolved in water, the hydroxyethyl acrylate is added to prepare the material B.
Further, the material C is prepared by dissolving 0.22-0.4 part of sodium hydroxide in 10-14 parts of water in parts by mass.
Furthermore, the base material is prepared by dissolving 36-38 parts by mass of vinyl polyoxyethylene ether, 0.25-0.4 part by mass of hydrogen peroxide, 0.45-1 part by mass of sodium hypophosphite and 0.02-0.1 part by mass of ferrous sulfate in 30-33 parts by mass of water.
A preparation method of normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor comprises the following operations in parts by mass:
1) 2-3 parts of acrylic acid is dissolved in 6-8 parts of water to prepare a material A;
2) dissolving 0.05-0.1 part of vitamin C in 6-8 parts of water, adding 0.6-1.2 parts of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
3) dissolving 0.22-0.4 part of sodium hydroxide in 10-14 parts of water to prepare a material C;
4) dissolving 36-38 parts of vinyl polyoxyethylene ether in 30-33 parts of water, wherein the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 16-20 ℃, the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 70-80% and the temperature of the solution is 15-19 ℃, adding 0.45-1 part of sodium hypophosphite, stirring for 1min, and then sequentially adding 0.25-0.4 part of hydrogen peroxide and 0.02-0.1 part of ferrous sulfate to prepare a bottom material;
5) uniformly dropping the material A and the material B into the base material, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1 h;
6) adding the material C, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
Further, in the step 4), the temperature of the solution is controlled by a temperature-adjusting electric heating sleeve.
Further, in the step 5), the material A and the material B are uniformly dripped into the bed charge by an automatic dripping instrument.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the chemical reaction generated in the synthesis process of the water-reducing mother liquor is essentially a macromolecular free radical polymerization reaction, in the reaction, hydrogen peroxide, vitamin C and ferrous sulfate form an oxidation-reduction system in the reaction system to induce the free radical polymerization reaction of the six-carbon macromonomer and acrylic acid, the oxidant is hydrogen peroxide, the reducing agent is vitamin C and ferrous sulfate, and the conversion rate of mother liquor molecules can be directly influenced by the amount of the oxidation-reduction agent. And the water reducing and slump retaining effects of the concrete can be further controlled by controlling the content of the ferrous sulfate in the redox agent, so that the prepared water reducing agent has excellent water reducing performance and slump retaining performance.
2. The sodium hypophosphite is used as a chain transfer agent in the reaction, so that the molecular weight of the mother liquor of the water reducing agent can be adjusted, the service life of free radicals is prolonged, and the synthesis of the water reducing agent is benefited. The length of the main chain of the water reducing agent molecule can be controlled by controlling the content of sodium hypophosphite, so that the water reducing agent molecule can be stretched in water and effectively adsorb cement particles, the fluidity of concrete is improved, and the concrete has good slump retaining performance. The functional third monomer ester monomer, namely hydroxyethyl acrylate, is added, so that the adsorption and dispersion of the cement can be maintained in the gradual hydrolysis process, and the slump loss prevention effect is realized while the water reduction is improved.
3. The mother liquor synthesis process is simple, free radical polymerization is promoted through an oxidation-reduction system, the required activation energy is low, the free radical polymerization can be carried out at normal temperature, compared with the high-temperature synthesis process popular in the market, high-temperature heating equipment is not needed in the invention, the reaction requirement can be met by common equipment, and the production energy consumption is greatly reduced.
Detailed Description
The present invention will now be described in further detail, with the understanding that the present invention is to be considered as illustrative and not restrictive.
The invention discloses a normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother solution, which comprises a material A, a material B, a material C and a bottom material, wherein the material A comprises the following components in parts by weight:
the material A is prepared by dissolving acrylic acid in water;
the material B is prepared by dissolving hydroxyethyl acrylate and vitamin C in water;
the material C is prepared by dissolving sodium hydroxide in water;
the bottom material is prepared by dissolving a six-carbon macromonomer, hydrogen peroxide, sodium hypophosphite and ferrous sulfate in water; and adding the material A and the material B into the base material, and after the reaction is completed, adding the material C to prepare the polycarboxylate superplasticizer mother solution.
The six-carbon macromonomer is vinyl polyoxyethylene ether.
The material A is prepared by dissolving 2-3 parts of acrylic acid in 6-8 parts of water in parts by mass.
The B material is prepared by dissolving 0.6-1.2 parts of hydroxyethyl acrylate and 0.05-0.1 part of vitamin C in 6-8 parts of water in parts by mass.
And after the vitamin C is dissolved in water, the hydroxyethyl acrylate is added to prepare the material B.
The material C is prepared by dissolving 0.22-0.4 part of sodium hydroxide in 10-14 parts of water in parts by mass.
The base material is prepared by dissolving 36-38 parts of vinyl polyoxyethylene ether, 0.25-0.4 part of hydrogen peroxide, 0.45-1 part of sodium hypophosphite and 0.02-0.1 part of ferrous sulfate in 30-33 parts of water in parts by mass.
The invention also discloses a preparation method of the normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor, which comprises the following operations in parts by mass:
1) 2-3 parts of acrylic acid is dissolved in 6-8 parts of water to prepare a material A;
2) dissolving 0.05-0.1 part of vitamin C in 6-8 parts of water, adding 0.6-1.2 parts of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
3) dissolving 0.22-0.4 part of sodium hydroxide in 10-14 parts of water to prepare a material C;
4) dissolving 36-38 parts of vinyl polyoxyethylene ether in 30-33 parts of water, wherein the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 16-20 ℃, the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 70-80% and the temperature of the solution is 15-19 ℃, adding 0.45-1 part of sodium hypophosphite, stirring for 1min, and then sequentially adding 0.25-0.4 part of hydrogen peroxide and 0.02-0.1 part of ferrous sulfate to prepare a bottom material;
5) uniformly dropping the material A and the material B into the base material, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1 h;
6) adding the material C, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
And in the step 4), the temperature of the solution is controlled by a temperature-regulating electric heating sleeve.
And 5) dropwise adding the material A and the material B into the base material at a constant speed by using an automatic dropwise adding instrument.
Specific examples are given below.
Example 1
Preparing a polycarboxylate superplasticizer according to the following weight parts:
a material: 2.5 parts of acrylic acid and 7 parts of water;
b, material B: 0.8 part of hydroxyethyl acrylate, 0.08 part of vitamin C and 7 parts of water;
c, material C: 0.3 part of sodium hydroxide and 13 parts of water;
bottom materials: 37 parts of vinyl polyoxyethylene ether, 0.3 part of hydrogen peroxide, 0.71 part of sodium hypophosphite, 0.05 part of ferrous sulfate and 31.26 parts of water.
2.5 parts of acrylic acid is dissolved in 7 parts of water to prepare a material A;
dissolving 0.08 part of vitamin C in 7 parts of water, adding 0.8 part of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
dissolving 0.3 part of sodium hydroxide in 13 parts of water to prepare a material C;
dissolving 37 parts of vinyl polyoxyethylene ether in 31.26 parts of water, adding 0.71 part of sodium hypophosphite and stirring for 1min when the temperature of the solution is 16-20 ℃ and 70-80% of the vinyl polyoxyethylene ether is dissolved and the temperature of the solution is 15-19 ℃, and then sequentially adding 0.3 part of hydrogen peroxide and 0.05 part of ferrous sulfate to prepare a base material;
uniformly dropping the material A and the material B into the base material by an automatic dropping instrument, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1h, and controlling the temperature of the solution by a temperature-adjusting electric heating sleeve to preserve the heat of the solution;
and C, adding the material C, neutralizing the mother liquor, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
Example 2
Preparing a polycarboxylate superplasticizer according to the following weight parts:
a material: 2 parts of acrylic acid and 7.5 parts of water;
b, material B: 0.6 part of hydroxyethyl acrylate, 0.05 part of vitamin C and 7.5 parts of water;
c, material C: 0.22 part of sodium hydroxide and 13.41 parts of water;
bottom materials: 36 parts of vinyl polyoxyethylene ether, 0.25 part of hydrogen peroxide, 0.45 part of sodium hypophosphite, 0.02 part of ferrous sulfate and 32 parts of water.
Dissolving 2 parts of acrylic acid in 7.5 parts of water to prepare a material A;
dissolving 0.05 part of vitamin C in 7.5 parts of water, adding 0.6 part of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
dissolving 0.22 part of sodium hydroxide in 13.41 parts of water to prepare a material C;
dissolving 36 parts of vinyl polyoxyethylene ether in 32 parts of water, adding 0.45 part of sodium hypophosphite and stirring for 1min when the temperature of the solution is 16-20 ℃ and 70-80% of the vinyl polyoxyethylene ether is dissolved and the temperature of the solution is 15-19 ℃, and then sequentially adding 0.25 part of hydrogen peroxide and 0.02 part of ferrous sulfate to prepare a base material;
uniformly dropping the material A and the material B into the base material by an automatic dropping instrument, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1h, and controlling the temperature of the solution by a temperature-adjusting electric heating sleeve to preserve the heat of the solution;
and C, adding the material C, neutralizing the mother liquor, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
Example 3
Preparing a polycarboxylate superplasticizer according to the following weight parts:
a material: 3 parts of acrylic acid and 6.5 parts of water;
b, material B: 1 part of hydroxyethyl acrylate, 0.1 part of vitamin C and 6.5 parts of water;
c, material C: 0.4 part of sodium hydroxide and 10 parts of water;
bottom materials: 38 parts of vinyl polyoxyethylene ether, 0.4 part of hydrogen peroxide, 1 part of sodium hypophosphite, 0.1 part of ferrous sulfate and 33 parts of water.
Dissolving 3 parts of acrylic acid in 6.5 parts of water to prepare a material A;
dissolving 0.1 part of vitamin C in 6.5 parts of water, adding 1 part of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
dissolving 0.4 part of sodium hydroxide in 10 parts of water to prepare a material C;
dissolving 38 parts of vinyl polyoxyethylene ether in 33 parts of water, wherein the temperature of the solution after the vinyl polyoxyethylene ether is dissolved is 16-20 ℃, adding 1 part of sodium hypophosphite and stirring for 1min when the vinyl polyoxyethylene ether is dissolved at 70-80% and the temperature of the solution is 15-19 ℃, and then sequentially adding 0.4 part of hydrogen peroxide and 0.1 part of ferrous sulfate to prepare a bottom material;
uniformly dropping the material A and the material B into the base material by an automatic dropping instrument, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1h, and controlling the temperature of the solution by a temperature-adjusting electric heating sleeve to preserve the heat of the solution;
and C, adding the material C, neutralizing the mother liquor, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
The water-reducing agent mother liquor prepared according to examples 1-3 was added to concrete and the test results obtained were as follows:
table 1: test results of the self-made water reducing agent prepared in examples 1 to 3 after adding to concrete
In table 1, the slump and the spread in the initial state react to reduce the water effect, and the larger the numerical value is, the better the water reduction effect is; the slump and the expansion degree under the state of 60min react with the slump-retaining effect, and the larger the numerical value is, the better the slump-retaining effect is.
As can be seen from Table 1, the polycarboxylic acid water reducing agent prepared in example 1 has the best water reducing effect and slump retaining effect; compared with the water reducing agent prepared in the embodiment 1, the polycarboxylate water reducing agent prepared in the embodiment 2 has poorer water reducing effect and slump retaining effect; the polycarboxylate superplasticizer prepared according to example 3 has the worst water reducing effect and slump retaining effect.
Conclusion analysis: the concentration of the redox system reactant in the water reducing agent prepared in the embodiment 2 is low, the induced free radicals are less, the reaction activity is low, the concentration of the chain transfer agent is also low, the molecular weight of the prepared mother liquor is poor for improving the trial mixing performance of the concrete, and particularly the fluidity of the concrete is poor.
In the water reducing agent prepared in the embodiment 3, the concentration of the redox system reactant is high, more free radicals are induced to be generated, the reaction activity is too high, the concentration of the chain transfer agent is also high, and the slump retaining performance of the prepared mother liquor after being mixed with concrete is poor.
The concentration of the reactant in the redox reaction system of example 1 is moderate compared with the concentration of the reactant in the redox reaction systems of examples 2 and 3, so that the polyoxyethylene vinyl ether can be normally induced to prepare a free radical, and the polyoxyethylene vinyl ether and the acrylic acid are initiated to carry out a polymerization reaction; meanwhile, sodium hypophosphite is used as a chain transfer agent, the concentration of the sodium hypophosphite can also influence the molecular weight of the mother liquor of the polycarboxylic acid water reducing agent, and further influences the water reducing effect and the slump retaining effect, and the sodium hypophosphite has small molecular weight, poor slump retaining effect, large molecular weight and poor water reducing effect; the content of sodium hypophosphite in the embodiment 1 is larger than that of the embodiment 2 and smaller than that of the embodiment 3, so the slump retaining effect and the water reducing effect of the embodiment 1 are better than those of the embodiments 2 and 3.
The comprehensive water reducing agent mother liquor, the common comprehensive water reducing agent, the domestic comprehensive water reducing mother liquor and a certain foreign comprehensive water reducing mother liquor prepared in example 1 (the self-made comprehensive water reducing mother liquor in the following table) are selected for mixing and preparing concrete for comparison, and the actual effect data is as follows.
Table 2: practical effect table of self-made water reducing agent and market mainstream product added into concrete in example 1
In table 2, the slump and the spread in the initial state react with the water-reducing effect, and the larger the numerical value is, the better the water-reducing effect is; the slump and the expansion degree under the state of 60min react with the slump-retaining effect, and the larger the numerical value is, the better the slump-retaining effect is. Experimental detection and comparison data show that the initial water reducing effect and the later slow-release slump retaining effect of the water reducing agent mother liquor prepared according to the embodiment 1 are ideal, the excellent comprehensive performance of the self-made water reducing agent mother liquor is shown, and the water reducing agent mother liquor is obviously superior to main-stream products in the market.
The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.
Claims (10)
1. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor is characterized by comprising a material A, a material B, a material C and a bottom material, wherein:
the material A is prepared by dissolving acrylic acid in water;
the material B is prepared by dissolving hydroxyethyl acrylate and vitamin C in water;
the material C is prepared by dissolving sodium hydroxide in water;
the bottom material is prepared by dissolving six-carbon macromonomer, hydrogen peroxide, sodium hypophosphite and ferrous sulfate in water; and adding the material A and the material B into the base material, and after the reaction is completed, adding the material C to prepare the polycarboxylate superplasticizer mother solution.
2. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein said six-carbon macromonomer is vinyl polyoxyethylene ether.
3. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein said material A is prepared by dissolving 2-3 parts by mass of acrylic acid in 6-8 parts by mass of water.
4. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein said B material is prepared by dissolving 0.6-1.2 parts of hydroxyethyl acrylate and 0.05-0.1 part of vitamin C in 6-8 parts of water by mass.
5. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein said vitamin C is dissolved in water, and then said hydroxyethyl acrylate is added to prepare said material B.
6. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein said C material is prepared by dissolving 0.22-0.4 parts by mass of sodium hydroxide in 10-14 parts by mass of water.
7. The normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 1, wherein the base material is prepared by dissolving 36-38 parts by mass of vinyl polyoxyethylene ether, 0.25-0.4 part by mass of hydrogen peroxide, 0.45-1 part by mass of sodium hypophosphite and 0.02-0.1 part by mass of ferrous sulfate in 30-33 parts by mass of water.
8. The preparation method of the normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor is characterized by comprising the following operations in parts by mass:
1) 2-3 parts of acrylic acid is dissolved in 6-8 parts of water to prepare a material A;
2) dissolving 0.05-0.1 part of vitamin C in 6-8 parts of water, adding 0.6-1.2 parts of hydroxyethyl acrylate after the vitamin C is completely dissolved, and uniformly stirring to prepare a material B;
3) dissolving 0.22-0.4 part of sodium hydroxide in 10-14 parts of water to prepare a material C;
4) dissolving 36-38 parts of vinyl polyoxyethylene ether in 30-33 parts of water, wherein the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 16-20 ℃, the temperature of the solution after the dissolution of the vinyl polyoxyethylene ether is 70-80% and the temperature of the solution is 15-19 ℃, adding 0.45-1 part of sodium hypophosphite, stirring for 1min, and then sequentially adding 0.25-0.4 part of hydrogen peroxide and 0.02-0.1 part of ferrous sulfate to prepare a bottom material;
5) uniformly dropping the material A and the material B into the base material, wherein the dropping time of the material A is 30min, the dropping time of the material B is 40min, stirring, preserving heat and curing for 1 h;
6) adding the material C, and stirring for 10min to prepare the polycarboxylic acid water reducing agent mother liquor.
9. The method for preparing normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 8, wherein in the step 4), the temperature of the solution is controlled by a temperature-adjusting electric heating sleeve.
10. The method for preparing normal-temperature six-carbon comprehensive polycarboxylate superplasticizer mother liquor as claimed in claim 8, wherein in the step 5), the material A and the material B are uniformly dripped into the base material by an automatic dripping instrument.
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| US20060183820A1 (en) * | 2005-02-14 | 2006-08-17 | Nippon Shokubai Co., Ltd. | Cement admixture and method for producing the same |
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