CN111072870A - High-adaptability polycarboxylate superplasticizer and preparation method thereof - Google Patents
High-adaptability polycarboxylate superplasticizer and preparation method thereof Download PDFInfo
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- CN111072870A CN111072870A CN201911411810.5A CN201911411810A CN111072870A CN 111072870 A CN111072870 A CN 111072870A CN 201911411810 A CN201911411810 A CN 201911411810A CN 111072870 A CN111072870 A CN 111072870A
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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
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
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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
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
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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
Abstract
The invention relates to a high-adaptability polycarboxylate superplasticizer and a preparation method thereof, wherein the high-adaptability polycarboxylate superplasticizer comprises the following components: 200 portions of deionized water and 216 portions, 200 portions of polyether macromonomer and 190 portions, 19 to 21 portions of acrylic acid, 1 to 2 portions of functional monomer, 0.8 to 0.85 portion of chain transfer agent, 0.7 to 0.9 portion of oxidative initiator, 0.25 to 0.29 portion of reductive initiator and 19 to 20 portions of neutralizing agent. Compared with the common polycarboxylic acid water reducing agent, the water reducing agent has more complex spatial structure and steric hindrance, and is more suitable for complex ground materials; meanwhile, the introduced functional groups such as phosphate groups, sulfonic groups and the like can enable the water reducer to have better slump retaining property, and the workability and slump retaining working performance of concrete are improved.
Description
Technical Field
The invention relates to the technical field of water reducing agents, in particular to a high-adaptability polycarboxylate water reducing agent and a preparation method thereof.
Background
Since the 80 th century since the advent of the third generation of high-efficiency water reducers represented by polycarboxylic acid series, the technology of polycarboxylic acid water reducers has matured day by day through nearly forty years, and a series of functional polycarboxylic acid water reducers including early strength, viscosity reduction, mud resistance, slow release and the like have been developed. With the rapid development of economy and the improvement of building level in China, the requirement on the quality of concrete is higher and higher. But due to the reduction of high-quality sandstone resources and the complexity of concrete components, the workability of concrete is reduced, the slump loss is accelerated, and the adaptability problem of the water reducing agent to ground materials and cement is gradually highlighted. The research on the aspect of the high-adaptability polycarboxylate water reducer is still few in China, and when the workability of concrete is poor in a construction site, the workability of the concrete is improved by increasing the mixing amount of the water reducer, compounding various small materials, replacing better cement and the like. This increases both the workload and the cost of the site.
At present, the general polycarboxylic acid water reducing agent is widely used in China, the share of the polycarboxylic acid water reducing agent in the water reducing agent market is higher and higher, and the general polycarboxylic acid water reducing agent has certain limitation on the adaptability of the land material and the cement.
Disclosure of Invention
In order to overcome the technical problems in the prior art, the first object of the present invention is to provide a high-adaptability polycarboxylate water reducer, which comprises the following components: 200 portions of deionized water and 216 portions, 200 portions of polyether macromonomer and 190 portions, 19 to 21 portions of acrylic acid, 1 to 2 portions of functional monomer, 0.8 to 0.85 portion of chain transfer agent, 0.7 to 0.9 portion of oxidative initiator, 0.25 to 0.29 portion of reductive initiator and 19 to 20 portions of neutralizing agent.
Further, the polyether macromonomer is any two of isoamylol polyoxyethylene ether with the molecular weight of 1200, isoamylol polyoxyethylene ether with the molecular weight of 3000 and isoamylol polyoxyethylene ether with the molecular weight of 2400.
Further, the functional monomer is one or more of 2-acrylamide-2-methyl acrylic sulfonic acid, sodium methallyl sulfonate, acrylamide and maleic anhydride.
Further, the chain transfer agent is one or more of mercaptopropionic acid, thioglycolic acid, mercaptoethanol and sodium hypophosphite.
Further, the oxidative initiator is one or more of hydrogen peroxide, ammonium persulfate and sodium persulfate.
Further, the reducing initiator is one or more of ascorbic acid, sodium formaldehyde sulfoxylate, ferrous sulfate and sodium bisulfite.
Further, the neutralizing agent is one or more of sodium hydroxide solution, potassium hydroxide solution, triisopropanolamine and the like.
The second purpose of the invention is to provide a preparation method of the high-adaptability polycarboxylate superplasticizer, which comprises the following steps:
(1) the formula of claim 1, wherein 150 parts of deionized water, polyether macromonomer and oxidative initiator are put into a reaction kettle, stirred and dissolved uniformly, and the reaction temperature is 25-60 ℃;
(2) dissolving acrylic acid in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving a chain transfer agent and a reductive initiator in 50 parts of deionized water to prepare a dropping liquid B material for later use;
(3) simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed, dropwise adding the material A for 2-3 hours, dropwise adding the material B for 3-5 hours, and carrying out heat preservation reaction for 1-2 hours;
(4) adding a neutralizing agent to adjust the pH value to 6-7, and supplementing the residual deionized water until the solid content is 45% to obtain the high-adaptability polycarboxylate superplasticizer.
Compared with the prior art, the invention has the beneficial effects that:
compared with a common polycarboxylic acid water reducing agent, the water reducing agent has strong ground material adaptability and good slump retaining performance, avoids the phenomenon of too fast slump loss of concrete caused by high-temperature transportation, and ensures the working performance, mechanical property and good durability of the concrete. The water reducing agent synthesized by the prenyl polyoxyethylene ether with different molecular weights has different spatial structures and steric hindrance, and is more suitable for complex ground materials; meanwhile, the introduced functional groups such as phosphate groups, sulfonic groups and the like can enable the water reducer to have better slump retaining property, and the workability and slump retaining working performance of concrete are improved. The influence of the molecular microstructure such as the type and length of a side chain, the density of the side chain, the size and the distribution of molecular weight and the like on the solid-liquid interface properties of a cement and water system is changed, and the molecular structure and the physicochemical property of polycarboxylic acid influence the adsorption process of the water reducing agent on the surface of cement particles, thereby influencing the dispersion property and the hydration behavior of cement in water.
Detailed Description
The present invention will now be described in more detail with reference to the following examples, but it should be understood that the invention is not limited to the details of the examples set forth herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Putting 150 parts of deionized water, 10 parts of 1200 molecular weight isoamyl alcohol polyoxyethylene ether, 180 parts of 3000 molecular weight isoamyl alcohol polyoxyethylene ether and 0.7 part of hydrogen peroxide into a reaction kettle, stirring and dissolving uniformly, and heating to 30 ℃. 18 parts of acrylic acid and 2 parts of maleic anhydride are dissolved in 50 parts of deionized water to prepare a dropping liquid A material for standby, and 0.8 part of thioglycolic acid and 0.25 part of ascorbic acid are dissolved in 50 parts of deionized water to prepare a dropping liquid B material for standby. And simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed for 3 hours, dropwise adding the material B for 4 hours, and carrying out heat preservation reaction for 2 hours. And adding 19 parts of 30% sodium hydroxide solution to adjust the pH value to 6, and supplementing 15 parts of deionized water until the solid content is 45% to obtain the high-adaptability polycarboxylate superplasticizer.
Example 2
Putting 150 parts of deionized water, 5 parts of 1200 molecular weight isoamyl alcohol polyoxyethylene ether, 190 parts of 3000 molecular weight isoamyl alcohol polyoxyethylene ether and 0.9 part of sodium persulfate into a reaction kettle, stirring and dissolving uniformly, and heating to 60 ℃. Dissolving 19 parts of acrylic acid and 2 parts of 2-acrylamide-2-methacrylic sulfonic acid in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving 0.85 part of mercaptopropionic acid and 0.29 part of ferrous sulfate in 50 parts of deionized water to prepare a dropping liquid B material for later use. And simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed for 3 hours, dropwise adding the material B for 3.5 hours, and carrying out heat preservation reaction for 1 hour. And adding 20 parts of 30% hydrogen triisopropanolamine to adjust the pH value to 7, and supplementing 16 parts of deionized water until the solid content is 45%, thereby obtaining the high-adaptability polycarboxylic acid water reducer.
Example 3
Putting 150 parts of deionized water, 20 parts of 1200 molecular weight isoamyl alcohol polyoxyethylene ether, 180 parts of 2400 molecular weight isoamyl alcohol polyoxyethylene ether and 0.85 part of hydrogen peroxide into a reaction kettle, stirring and dissolving uniformly, and heating to 25 ℃. Dissolving 21 parts of acrylic acid and 1 part of maleic anhydride in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving 0.85 part of mercaptoethanol and 0.29 part of sodium bisulfite in 50 parts of deionized water to prepare a dropping liquid B material for later use. And simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed for 3 hours, dropwise adding the material B for 3.5 hours, and carrying out heat preservation reaction for 1.5 hours. And adding 20 parts of 30% potassium hydroxide solution to adjust the pH value to 7, and supplementing 15 parts of deionized water until the solid content is 45%, thereby obtaining the high-adaptability polycarboxylate water reducer.
Example 4
Putting 150 parts of deionized water, 80 parts of 2400 molecular weight isoamyl alcohol polyoxyethylene ether, 120 parts of 3000 molecular weight isoamyl alcohol polyoxyethylene ether and 0.85 part of sodium persulfate into a reaction kettle, stirring and dissolving uniformly, and heating to 40 ℃. Dissolving 21 parts of acrylic acid and 1 part of maleic anhydride in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving 0.85 part of sodium hypophosphite and 0.29 part of sodium formaldehyde sulfoxylate in 50 parts of deionized water to prepare a dropping liquid B material for later use. And simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed for 3 hours, dropwise adding the material B for 5 hours, and carrying out heat preservation reaction for 1 hour. And adding 20 parts of 30% sodium hydroxide solution to adjust the pH value to 7, and supplementing 15 parts of deionized water until the solid content is 45% to obtain the high-adaptability polycarboxylate superplasticizer.
Comparative example
A conventional polycarboxylic acid water reducing agent is prepared from the raw materials in parts by weight. Adding 130 parts of deionized water, 200 parts of prenyl alcohol polyoxyethylene ether with the molecular weight of 2400 and 0.85 part of hydrogen peroxide into a reaction kettle, stirring and dissolving uniformly, and heating to 40 ℃. Dissolving 21 parts of acrylic acid and 2 parts of maleic anhydride in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving 1.1 parts of mercaptopropionic acid and 0.27 part of ascorbic acid in 60 parts of deionized water to prepare a dropping liquid B material for later use. And simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed for 3 hours, dropwise adding the material B for 3.5 hours, and carrying out heat preservation reaction for 1 hour. And adding 20.5 parts of 30% sodium hydroxide solution to adjust the pH value to 6-7, and supplementing 8 parts of deionized water until the solid content is 45% to obtain the conventional polycarboxylic acid water reducer.
Experimental example 1
The test takes C30 concrete as an object, the cement adopts 42.5 ordinary portland cement in Runfeng Yuexi, Guangdong Yuexi, and the construction site in Yuexi uses the mineral powder with poor quality, machine-made sand, fine stone with more mud content and the like as raw materials, the initial slump/expansion degree and 1h slump/expansion degree of the concrete and the 3d, 7d and 28d compressive strength of the concrete are respectively tested under the condition that the high-adaptability polycarboxylate superplasticizer in the above examples 1-4 and the ordinary polycarboxylate superplasticizer in the comparative example have the same concentration, and the state and the workability of the concrete are observed. The performance of the concrete mixture is tested according to GB/T50080 Standard test method for the Performance of common concrete mixtures; the concrete strength is tested according to GB/T50081 Standard test method for mechanical Properties of ordinary concrete.
TABLE 1 concrete Properties test results
According to the experimental results of the initial slump/expansion and the 1h slump/expansion of the concrete, under the equal concentration, the 1h slump/expansion of the concrete mixtures of the examples 1, 2, 3 and 4 is obviously better than that of the common polycarboxylic acid water reducer group, which shows that the high-adaptability polycarboxylic acid water reducer for the C30 concrete has good slump retaining performance. The compressive strengths of 3d, 7d and 28d of the comparative concrete were superior to those of the conventional polycarboxylate water reducer group in the compressive strengths of 3d, 7d and 7d of the examples 1 to 4, and the overall concrete state of the examples 1 to 4 was significantly superior to that of the conventional polycarboxylate water reducer group. The high-adaptability polycarboxylate superplasticizer still has good slump retaining performance and adaptability under the condition of poor geological materials in Yuexi.
Experimental example 2
The test takes C30 concrete as an object, the cement adopts 42.5 common Portland cement of a fish peak in the middle area of Guangxi, mineral powder with poor texture in the areas of Guangxi, machine-made sand, fine stone and other aggregates are used as raw materials in construction sites, the initial slump/expansion and 1h slump/expansion of the concrete and the 3d, 7d and 28d compressive strength of the concrete are respectively tested under the condition that the high-adaptability polycarboxylate superplasticizer in the above examples 1-4 and the common polycarboxylate superplasticizer in a comparative example have the same concentration, and the state and the workability of the concrete are observed. The performance of the concrete mixture is tested according to GB/T50080 Standard test method for the Performance of common concrete mixtures; the concrete strength is tested according to GB/T50081 Standard test method for mechanical Properties of ordinary concrete.
TABLE 2 concrete Performance test results
According to the experimental results of the initial slump/expansion and the 1h slump/expansion of the concrete, in Guangxi areas, under the same conditions, the initial slump/expansion and the 1h slump/expansion of the concrete mixtures of the groups of examples 1, 2, 3 and 4 are superior to those of the common polycarboxylic acid water reducing agent group in the overall performance, and the slump retaining performance is particularly outstanding. The compressive strengths of 3d, 7d and 28d of the comparative concrete were better than those of the conventional polycarboxylate water reducer groups in the groups 1 to 4 in the examples. The high-adaptability polycarboxylate superplasticizer still has good slump retaining performance and adaptability under the poor ground material conditions in the middle area of Guangxi.
Experimental example 3
The test takes C30 concrete as an object, 42.5 common portland cement for conch in the middle area of Hainan is used as cement, mineral powder with poor texture in the Hainan area, machine-made sand, fine stone and other aggregates are used as raw materials in construction sites, the initial slump/expansion and 1h slump/expansion of the concrete and the 3d, 7d and 28d compressive strength of the concrete are respectively tested under the condition that the high-adaptability polycarboxylate superplasticizer in the above examples 1-4 and the common polycarboxylate superplasticizer in the comparative example have the same concentration, and the state and the workability of the concrete are observed. The performance of the concrete mixture is tested according to GB/T50080 Standard test method for the Performance of common concrete mixtures; the concrete strength is tested according to GB/T50081 Standard test method for mechanical Properties of ordinary concrete.
TABLE 3 concrete Property test results
According to the experimental results of the initial slump/expansion and the 1h slump/expansion of the concrete, the 1h slump/expansion of the concrete mixtures of the examples 1, 2, 3 and 4 are superior to that of the common polycarboxylic acid water reducing agent group in slump retaining performance under the same conditions in Hainan areas. The compressive strengths of 3d, 7d and 28d of the comparative concrete can reach or be better than those of the common polycarboxylate water reducer groups in the 3d, 7d and 7d of the groups 1-4 in the examples. The high-adaptability polycarboxylate superplasticizer still has good slump retaining performance and adaptability under the poor ground material conditions in the middle area of Guangxi.
In conclusion, the high-ground-adaptability polycarboxylate superplasticizer uses low-cost raw materials, and is economical and practical; the slump/expansion degree of the concrete mixture can be improved, the slump retaining capacity of the mixed soil is improved, and the slump retaining capacity and the slump retaining adaptability of the mixed soil are good even under the condition that the ground material is poor.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. The high-adaptability polycarboxylate superplasticizer is characterized by comprising the following substances in parts by weight: 200 portions of deionized water and 216 portions, 200 portions of polyether macromonomer and 190 portions, 19 to 21 portions of acrylic acid, 1 to 2 portions of functional monomer, 0.8 to 0.85 portion of chain transfer agent, 0.7 to 0.9 portion of oxidative initiator, 0.25 to 0.29 portion of reductive initiator and 19 to 20 portions of neutralizing agent.
2. The high-adaptability polycarboxylate water reducer according to claim 1, characterized in that the polyether macromonomer is any two of isoamylol polyoxyethylene ether with a molecular weight of 1200, isoamylol polyoxyethylene ether with a molecular weight of 3000 and isoamylol polyoxyethylene ether with a molecular weight of 2400.
3. The high-adaptability polycarboxylate water reducer according to claim 1, characterized in that the functional monomer is one or more of 2-acrylamido-2-methylpropanesulfonic acid, sodium methallylsulfonate, acrylamide and maleic anhydride.
4. The high-adaptability polycarboxylate water reducer according to claim 1, wherein the chain transfer agent is one or more of mercaptopropionic acid, mercaptoacetic acid, mercaptoethanol and sodium hypophosphite.
5. The high-adaptability polycarboxylate water reducer according to claim 1, characterized in that the oxidative initiator is one or more of hydrogen peroxide, ammonium persulfate and sodium persulfate.
6. The high-adaptability polycarboxylate water reducer according to claim 1, characterized in that the reducing initiator is one or more of ascorbic acid, sodium formaldehyde sulfoxylate, ferrous sulfate and sodium bisulfite.
7. The high-adaptability polycarboxylate water reducer according to claim 1, characterized in that the neutralizing agent is one or more of sodium hydroxide solution, potassium hydroxide solution, triisopropanolamine and the like.
8. The preparation method of the high-adaptability polycarboxylate water reducer as claimed in claim 1, characterized by comprising the following steps:
(1) the formula of claim 1, wherein 150 parts of deionized water, polyether macromonomer and oxidative initiator are put into a reaction kettle, stirred and dissolved uniformly, and the reaction temperature is 25-60 ℃;
(2) dissolving acrylic acid in 50 parts of deionized water to prepare a dropping liquid A material for later use, and dissolving a chain transfer agent and a reductive initiator in 50 parts of deionized water to prepare a dropping liquid B material for later use;
(3) simultaneously dropwise adding the prepared material A and the prepared material B into the reaction kettle at a constant speed, dropwise adding the material A for 2-3 hours, dropwise adding the material B for 3-5 hours, and carrying out heat preservation reaction for 1-2 hours;
(4) adding a neutralizing agent to adjust the pH value to 6-7, and supplementing the residual deionized water until the solid content is 45% to obtain the high-adaptability polycarboxylate superplasticizer.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909327A (en) * | 2020-08-18 | 2020-11-10 | 衡阳市九州建材有限公司 | Production and preparation method of polycarboxylate superplasticizer powder |
| CN113072317A (en) * | 2021-02-24 | 2021-07-06 | 山西佳维新材料股份有限公司 | Polycarboxylate superplasticizer and preparation method and application thereof |
| CN113527591A (en) * | 2021-07-13 | 2021-10-22 | 湖南加美乐素新材料股份有限公司 | Enhanced sulfur-supplementing slow-release polycarboxylate superplasticizer and preparation method thereof |
| CN113929835A (en) * | 2021-11-01 | 2022-01-14 | 江苏兆佳建材科技有限公司 | Polycarboxylate superplasticizer for machine-made sand and preparation method thereof |
| CN114591471A (en) * | 2022-03-09 | 2022-06-07 | 陕西友邦新材料科技有限公司 | Polycarboxylate superplasticizer based on double redox system and preparation method thereof |
| CN114716620A (en) * | 2022-03-09 | 2022-07-08 | 陕西友邦新材料科技有限公司 | High-adaptability six-carbon polycarboxylate superplasticizer mother liquor and preparation method thereof |
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| CN109053971A (en) * | 2018-07-09 | 2018-12-21 | 湖北工业大学 | A kind of polycarboxylate water-reducer preparation method of the high long short-chain branch of carboxyl density |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109053971A (en) * | 2018-07-09 | 2018-12-21 | 湖北工业大学 | A kind of polycarboxylate water-reducer preparation method of the high long short-chain branch of carboxyl density |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909327A (en) * | 2020-08-18 | 2020-11-10 | 衡阳市九州建材有限公司 | Production and preparation method of polycarboxylate superplasticizer powder |
| CN113072317A (en) * | 2021-02-24 | 2021-07-06 | 山西佳维新材料股份有限公司 | Polycarboxylate superplasticizer and preparation method and application thereof |
| CN113527591A (en) * | 2021-07-13 | 2021-10-22 | 湖南加美乐素新材料股份有限公司 | Enhanced sulfur-supplementing slow-release polycarboxylate superplasticizer and preparation method thereof |
| CN113527591B (en) * | 2021-07-13 | 2022-10-21 | 湖南加美乐素新材料股份有限公司 | Enhanced sulfur-supplementing slow-release polycarboxylate superplasticizer and preparation method thereof |
| CN113929835A (en) * | 2021-11-01 | 2022-01-14 | 江苏兆佳建材科技有限公司 | Polycarboxylate superplasticizer for machine-made sand and preparation method thereof |
| CN114591471A (en) * | 2022-03-09 | 2022-06-07 | 陕西友邦新材料科技有限公司 | Polycarboxylate superplasticizer based on double redox system and preparation method thereof |
| CN114716620A (en) * | 2022-03-09 | 2022-07-08 | 陕西友邦新材料科技有限公司 | High-adaptability six-carbon polycarboxylate superplasticizer mother liquor and preparation method thereof |
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Application publication date: 20200428 |