CN103936936B - Multiple-branching construction polycarboxylate water-reducer and synthetic method thereof - Google Patents
Multiple-branching construction polycarboxylate water-reducer and synthetic method thereof Download PDFInfo
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- CN103936936B CN103936936B CN201410090292.2A CN201410090292A CN103936936B CN 103936936 B CN103936936 B CN 103936936B CN 201410090292 A CN201410090292 A CN 201410090292A CN 103936936 B CN103936936 B CN 103936936B
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Abstract
The invention discloses a kind of multiple-branching construction polycarboxylate water-reducer, formed by following polymerizable raw material: a. methylallyl alcohol APEO; B. acrylic acid; C.N, N-methylene-bisacrylamide; D. ammonium persulfate or potassium peroxydisulfate; E. TGA or mercaptoethanol. Water reducer of the present invention makes concrete slump not loss in 2h, slightly raises on the contrary. Due to the reasonably course of reaction design of raw material selection and science, the molecular morphosis that synthetic product can have expection is multiple-branching construction, has superpower anti-adsorption capacity in mixture, has improved slump retaining and the water-reducing effect of water reducer.
Description
Technical field
The present invention relates to a kind of polycarboxylate water-reducer, specifically a kind of multiple-branching construction polycarboxylate water-reducer and synthetic method thereof.
Background technology
Along with the development and popularizing that extensive concrete mixing plant, concrete mixing and transporting car, Concrete Pumping Construction equipment are applied of architectural engineering technology, greatly promote the development of concrete admixture technology. Modern concrete is towards the future development of high-performance, greenization, and the requirement of water-reducing rate, slump retaining and the feature of environmental protection to concrete admixture is more and more higher.
Domestic research and production and the high efficiency water reducing agent being widely used, mainly contain following several according to its chemical composition classification: modified lignosulfonate high-efficiency water reducing agent, naphthalene series high-efficiency water-reducing agent, melamine resin series high-efficiency water-reducing agent, Amino-sulfonic Acid-based Water-reducer, polycarboxylate high-efficiency water reducing agent. The effect of summarizing high efficiency water reducing agent has following three aspects: (1), in the situation that keeping the mixture ratio of mud constant, improves its service behaviour; (2) keeping under the constant prerequisite of workability, mixing water reducer and can make concrete unit consumption of water reduce 5%-25%, improving concrete strength 5%-30%; (3) keeping under the prerequisite that concrete strength is constant, using water reducer can reduce the 5%-20% of cement consumption. In a word, it has produced huge economic benefit and social benefit to the effect final body of water reducer now.
Summary of the invention
The object of this invention is to provide a kind of multiple-branching construction polycarboxylate water-reducer and synthetic method thereof, have superpower anti-adsorption capacity, mix concrete can reach better diminishing and the guarantor effect of collapsing.
Technical scheme of the present invention is achieved in that multiple-branching construction polycarboxylate water-reducer, is formed by following polymerizable raw material:
A. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. ammonium persulfate or potassium peroxydisulfate
E. TGA or mercaptoethanol;
The mol ratio of described raw material is: a: b: c=1: 4.5～5.5: 0.1～0.5; D consumption is a, b, the 0.3-0.6% of c gross weight. E consumption is a, b, the 0.05-0.2% of c gross weight.
The preferred mol ratio of described raw material is: a: b: c (mol ratio)=1: 5: 0.1.
Described d preferable amount is a, b, the 0.4-0.5% of c gross weight.
Described e preferable amount is a, b, the 0.1-0.15% of c gross weight.
The synthetic method of multiple-branching construction polycarboxylate water-reducer, step is as follows: a is added to the reactor that suitable quantity of water is housed, stir and be warming up to 60 degree; By b, c adds in suitable quantity of water and is made into dropping liquid A, d is dissolved in to suitable quantity of water and is made into dropping liquid B, e is dissolved in to suitable quantity of water and is made into dropping liquid C; In reactor, evenly drip three kinds of dropping liquids simultaneously, dropwise rear continuation and keep 60-70 degree 1 hour, reaction finishes.
Described dropping liquid A, C added with 3 hours, and B added complete with 3.5 hours.
The concentration of described dropping liquid A is 30～50% mass fractions.
The concentration of described dropping liquid B is 5～10% mass fractions.
The concentration of described dropping liquid C is 5～20% mass fractions.
Beneficial effect of the present invention is: water reducer molecular morphosis of the present invention is multiple-branching construction, has superpower anti-adsorption capacity in mixture, has improved slump retaining and the water-reducing effect of water reducer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further explained to explanation.
Embodiment 1
Multiple-branching construction polycarboxylate water-reducer, raw material is:
A. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. potassium peroxydisulfate
E. mercaptoethanol;
The mol ratio of its Raw is a: b: c=1: 4.5: 0.1; D consumption is a, b, 0.3% of c gross weight. E consumption is a, b, 0.05% of c gross weight.
Concrete synthetic method is: a is added to the reactor that suitable quantity of water is housed, stir and be warming up to 60 degree; By b, c adds in suitable quantity of water and is made into dropping liquid A, d is dissolved in to suitable quantity of water and is made into dropping liquid B, e is dissolved in to suitable quantity of water and is made into dropping liquid C; In reactor, evenly drip three kinds of dropping liquids simultaneously, A, C added with 3 hours, and B added complete with 3.5 hours, then continue to keep 60-70 degree 1 hour, and reaction finishes.
Embodiment 2
Raw materials usedly be: a. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. ammonium persulfate
E. TGA;
The mol ratio of described raw material is: a: b: c=1: 5.5: 0.5; D consumption is a, b, 0.6% of c gross weight. E consumption is a, b, 0.2% of c gross weight.
Synthetic method is with embodiment 1.
Embodiment 3
Raw material used is: a. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. potassium peroxydisulfate
E. mercaptoethanol;
The mol ratio of described raw material is: a: b: c=1: 5: 0.4; D consumption is a, b, 0.5% of c gross weight. E consumption is a, b, 0.15% of c gross weight.
Synthetic method is with embodiment 1.
Embodiment 4
Raw materials usedly be: a. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. potassium peroxydisulfate
E. mercaptoethanol;
The mol ratio of described raw material is: a: b: c=1: 5.5: 0.3; D consumption is a, b, 0.4% of c gross weight. E consumption is a, b, 0.1% of c gross weight.
Synthetic method is with embodiment 1.
This product water reducer (20% solids content) is mixed to the test of carrying out the slump and divergence in concrete, see the following form.
As seen from table, concrete slump is not loss in 2h, slightly raises on the contrary. This is that the molecular morphosis that synthetic product can have expection is multiple-branching construction, has superpower anti-adsorption capacity in mixture, has improved slump retaining and the water-reducing effect of water reducer due to the reasonably course of reaction design of raw material selection and science.
The above; it is only preferably detailed description of the invention of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. multiple-branching construction polycarboxylate water-reducer, is characterized in that, is formed by following polymerizable raw material:
A. methylallyl alcohol APEO
B. acrylic acid
C.N, N-methylene-bisacrylamide
D. ammonium persulfate or potassium peroxydisulfate
E. TGA or mercaptoethanol;
The mol ratio of described raw material is: a:b:c=1:4.5～5.5:0.1～0.5;
D consumption is a, b, the 0.3-0.6% of c gross weight;
E consumption is a, b, the 0.05-0.2% of c gross weight;
Its synthetic method is: a is added to the reactor that suitable quantity of water is housed, stir and be warming up to 60 degree; By b, c adds in suitable quantity of water and is made into dropping liquid A, d is dissolved in to suitable quantity of water and is made into dropping liquid B, e is dissolved in to suitable quantity of water and is made into dropping liquid C; In reactor, evenly drip three kinds of dropping liquids simultaneously, dropwise rear continuation and keep 60-70 degree 1 hour, reaction finishes.
2. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, the mol ratio of described raw material is: a:b:c=1:5:0.1.
3. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, described d consumption is a, b, the 0.4-0.5% of c gross weight.
4. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, described e consumption is a, b, the 0.1-0.15% of c gross weight.
5. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, A, and C added with 3 hours, and B added complete with 3.5 hours.
6. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, the concentration of described dropping liquid A is 30～50% mass fractions.
7. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, the concentration of described dropping liquid B is 5～10% mass fractions.
8. multiple-branching construction polycarboxylate water-reducer according to claim 1, is characterized in that, the concentration of described dropping liquid C is 5～20% mass fractions.
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Families Citing this family (4)
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| CN105110687B (en) * | 2015-07-30 | 2017-06-06 | 厦门路桥翔通建材科技有限公司 | A kind of anti-mud collapse protective poly-carboxylic acid water reducing agent and preparation method thereof |
| CN107236089A (en) * | 2017-05-27 | 2017-10-10 | 湖南金华达建材有限公司 | A kind of low viscous type polycarboxylate water-reducer and its simple method for preparing |
| CN107573466A (en) * | 2017-09-11 | 2018-01-12 | 科之杰新材料集团有限公司 | A kind of preparation method of micro- long-acting slump retaining agent of crosslinking |
| CN115594844B (en) * | 2022-11-09 | 2023-08-29 | 德蓝(海南)未来之水有限公司 | Special water purifying agent for petroleum and petrochemical industry and preparation method thereof |
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| CN1670047A (en) * | 2004-12-31 | 2005-09-21 | 仲恺农业技术学院 | Antibacterial high water-absorbent resin and method for preparation thereof |
| CN101041570A (en) * | 2007-04-27 | 2007-09-26 | 北京工业大学 | Preparation method of graft copolymerization carboxylate high-performance dehydragent |
| CN102617065A (en) * | 2012-03-06 | 2012-08-01 | 上海市建筑科学研究院(集团)有限公司 | Multi-branch polycarboxylic acid water reducing agent with slump-retaining performance and preparation method thereof |
| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
| CN103183793A (en) * | 2013-03-26 | 2013-07-03 | 武汉市联合石油化工有限责任公司 | Synthetic method of polycarboxylic acid type highly slump loss resistant water-reducing agent |
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| CN1359974A (en) * | 2001-12-29 | 2002-07-24 | 中国科学院长春应用化学研究所 | Process for preparing high-hydroscopicity composite resin for agricultural purpose |
| CN1670047A (en) * | 2004-12-31 | 2005-09-21 | 仲恺农业技术学院 | Antibacterial high water-absorbent resin and method for preparation thereof |
| CN101041570A (en) * | 2007-04-27 | 2007-09-26 | 北京工业大学 | Preparation method of graft copolymerization carboxylate high-performance dehydragent |
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