CN102633951A - Polyether polycarboxylic-acid water reducer and preparation method thereof - Google Patents
Polyether polycarboxylic-acid water reducer and preparation method thereof Download PDFInfo
- Publication number
- CN102633951A CN102633951A CN2012101032250A CN201210103225A CN102633951A CN 102633951 A CN102633951 A CN 102633951A CN 2012101032250 A CN2012101032250 A CN 2012101032250A CN 201210103225 A CN201210103225 A CN 201210103225A CN 102633951 A CN102633951 A CN 102633951A
- Authority
- CN
- China
- Prior art keywords
- monomer
- aqueous solution
- water
- monomers
- polyether
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Macromonomer-Based Addition Polymer (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a polyether polycarboxylic-acid water reducer and a preparation method thereof. The preparation method comprises the following steps of: dissolving monomers in distilled water at 50 DEG C to obtain a water solution; adding an oxidization-type initiator with the total monomer mass being 0.15% to 0.30% in the obtained water solution, wherein an ammonium persulfate solution with the mass concentration being 1% serves as the oxidization-type initiator; dropping an acrylic acid water solution and a compound water solution in a flask and finishing the dropping process in 1.5 to 2.5 hours, wherein the compound water solution is prepared from a reduction initiator and a chain transfer agent; and performing heat preservation on the mixed solution for 1 hour to 2 hours at 75 DEG C, cooling the mixed solution to 30 to 50 DEG C, and adjusting the pH value of the mixed solution. According to the invention, as the large modified polyether monomers with different molecular weights are introduced into the water reducer, the molecular weight distribution of the synthetic polymer is controllable, the water reducing rate is higher, the gradual loss of fluidity of cement paste is small, and the dispersion performance of the fluidity of cement paste is better. According to the invention, as one-kettle reaction method is adopted, no three wastes are discharged, the process is simple, the reaction conditions are easy to control, the production period is short, the energy consumption is low, the environment friendliness is achieved, and the cost is low, so that the polyether polycarboxylic-acid water reducer is applicable to industrial scale production and achieves high performance and economical efficiency.
Description
Technical field
The invention belongs to technical field of concrete additives, be specifically related to a kind of polyether-type polycarboxylate water-reducer and preparation method thereof.
Background technology
The concrete admixture technology is to develop new technology faster half a century.According to incompletely statistics, at present world's concrete admixture product reached four, 500 kind more than, the U.S., Canada, Germany, the FSU, Britain etc.; The rate of utilization of admixture in cement concrete is generally 50%～80%, and other country adopts the ratio of admixture also can improve concrete performance at the application concrete admixture that grows with each passing day; Save the cement and the energy; Improve speed of application and construction quality, improve technology and labor condition, have remarkable economic efficiency and social benefit.Polycarboxylate high performance water-reducing agent be continue with wooden calcium be the ordinary water-reducing agent of representative and be the high efficiency water reducing agent of representative with naphthalene system after the third generation high-performance water reducing agent that grows up, be forefront, scientific and technological content is the highest, application prospect is best, over-all properties is optimum a kind of high-performance water reducing agent in the world at present.
Compare with traditional water reducer; Performances such as high performance water reducing agent of polyocarboxy acid has excellent diminishing, the guarantor is collapsed, bleed is low; Polycarboxylate water-reducer is novel high efficiency water reducing agent; It has become the requisite admixture of high performance concrete, though domestic research to polycarboxylate water-reducer has obtained certain achievement, but still has problems such as overall performance difference and unstable properties.
At present, polycarboxylic acids dehydragent mainly contains following three kinds: 1. polyester type water reducer, and methoxy poly (ethylene glycol) list (methyl) propenoate that promptly generates with methoxy poly (ethylene glycol) and (methyl) vinylformic acid is as the water reducer of the big monomer preparation of polyoxyethylene groups; 2. common polyether-type water reducer, the water reducer that promptly prepares as the big monomer of main polyoxyethylene groups with allyl polyglycol or its modified product; 3. high-performance polyethers type water reducer is promptly with methylallyl polyoxyethylene glycol or its modified product water reducer as the big monomer preparation of main polyoxyethylene groups.Compare the polyester type water reducer; The synthesis technique of common polyether-type water reducer is simple, cost is low, polymerization concentration high; But its water-reducing rate, function of slump protection and cement adaptability are not as the polyester type water reducer, and the range of application when using separately is narrower, so Chang Yiqi and the composite use of polyester type water reducer.But; High-performance polyethers type water reducer promptly has advantages such as polyester type water reducer cement adaptability is good, water-reducing rate is high, function of slump protection is good, simple, the polymerization concentration advantages of higher of the common polyether-type water reducer of tool synthesis technique again, in addition; Degree of freedom is big on the molecular structure; Controllable parameter is many on the synthetic technology, and the potentiality of high performance are big, and environment is not polluted; With advantages such as the concrete admixture consistency of cement and other kinds are good, so will become the leading product of cement water reducing agent in this century.
The technical problem that solves:
Still there are a lot of difficulties in the research high-performance water reducing agent; Research to aspects such as synthetic, the mechanism of action of poly carboxylic acid series water reducer and application all waits further further investigation: (1) is because the water reducer great majority are synthetic in aqueous systems; Be difficult to understand complex interactions between different monomers: there is limitation in the method that (2) characterize the water reducer molecule; Still can not clear interpretation water reducer chemical structure and the relation of performance, lack research from the microtexture aspect; The invention discloses a kind of preparation method of polyether-type polycarboxylate water-reducer, under the condition that initiator exists, carry out copolyreaction and be prepared from, finally obtain the water reducer of comb-type structure by two or more monomer.
Summary of the invention
The objective of the invention is to the existing defective of above-mentioned existing technology; Provide that a kind of molecular weight may command, water-reducing rate are high, flowing degree of net paste of cement through the time loss little; A kind of polyether-type polycarboxylate water-reducer that its dispersing property is more excellent; Its technology is simple, reaction conditions is easy to control, and is with short production cycle, energy consumption is low, environmental protection, preparation technology with low cost.
For realizing the foregoing invention purpose, the technical scheme that the present invention adopts is following:
A kind of preparation method of polyether-type polycarboxylate water-reducer is characterized in that, specifically comprises the steps:
1) the polyether-type polycarboxylate water-reducer is processed by following mass percent by following monomer: monomer A: 0%～90%, and monomers B: 0%～90%, monomer C:10～20%; Above-mentioned three kinds of monomeric mass percent sums are 100%; Wherein, said monomer A is that molecular weight is 2000～2500 modified polyether; Said monomers B is that molecular weight is 1000～1300 modified polyether; Said monomer C is a vinylformic acid;
2) under 50 ℃ of conditions, monomer A fully is dissolved in obtains the monomer A aqueous solution in the zero(ppm) water; Or monomers B fully is dissolved in obtain the monomers B aqueous solution in the zero(ppm) water; Or monomer A and monomers B fully are dissolved in obtain in the zero(ppm) water aqueous solution of monomer A and monomers B mixture; Then obtained aqueous solution is warming up to 75 ℃; The mass concentration of this aqueous solution is 50～70%;
3) the oxidized form initiator of adding total monomer quality 0.15～0.30% in obtained aqueous solution, this oxidized form initiator employing mass concentration are 1% ammonium persulfate aqueous solution;
4) using two tap funnels in flask, to splash into mass concentration simultaneously is that 25% acrylic acid aqueous solution and mass concentration are 1.0% compound aqueous solution, in 1.5～2.5 hours, dropwises; Said compound aqueous solution is formulated by reduced form initiator and chain-transfer agent;
5) be incubated 1～2 hour under 75 ℃ of conditions, be cooled to 30～50 ℃ then, add mass concentration again and be 30% NaOH solution regulating step 4) the pH value of gained solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer.
The present invention also comprises following other technologies characteristic:
Said compound aqueous solution is formulated by reduced form initiator and chain-transfer agent; Wherein, the quality of reduced form initiator is 0.2～0.5% of a total monomer quality; The quality of chain-transfer agent is 0.3～0.5% of a total monomer quality, and described total monomer comprises monomer A, monomers B and monomer C.
Said reduced form initiator adopts one or more among Sulfothiorine, ferrous sulfate, sodium sulfite anhy 96 or the vitamin V c.
Said chain-transfer agent adopts one or more in Thiovanic acid, the Dodecyl Mercaptan.
The model that said monomer A adopts Zhejiang Real Madrid chemical industry group company to produce is respectively the allyl alcohol polyethenoxy ether of HMXB 53; The model that said monomers B adopts Zhejiang Real Madrid chemical industry group company to produce is the allyl alcohol polyethenoxy ether of HMXB 23.
The polyether-type polycarboxylate water-reducer of described method preparation.
During the direct copolymerization of vinylformic acid and unmodified polyether monomer; Can cause a large amount of vinylformic acid autohemagglutinations, reduce, therefore exist the molecular weight of polymkeric substance to be difficult to control so that participate in the ratio of copolymerization; Defectives such as MWD broad; Thereby make concrete water-reducing ratio lower, it is bigger through time loss, has the problem of vinylformic acid self-polymerization when further solving the direct copolymerization of vinylformic acid and allyl polyethenoxy alcohol ether (APEG); The contriver has carried out a large amount of experimental studies and found: the activity of modified polyether is between vinylformic acid and allyl polyethenoxy ether; Introduce modified polyether and can adjust vinylformic acid and the monomeric reactive behavior of allyl polyethenoxy alcohol ether (APEG), can adjust the balance of the hydrophilic and oleophilic group of water reducer system, improve the water-reducing rate and the function of slump protection of multipolymer.
Compared with prior art, reaction mechanism of the present invention and beneficial effect are following:
The present invention introduces modified polyether; Change the activity of reaction monomers vinylformic acid and allyl polyethenoxy alcohol ether (APEG), reduced acrylic acid autohemagglutination ratio, in the aqueous solution, passed through redox initiation system radical polymerization; Improved the copolymerization ratio; The cost of raw material is reduced greatly, and the polymeric molecular weight is controlled, water-reducing rate is higher.
Because it is more more stable in allyl polyethenoxy alcohol ether (APEG) the molecule alkaline environment at high temperature than Methylacrylic acid polyethylene glycol single armor ether (modified polyether HMXB); Therefore water reducer of the present invention has improved the performance that concrete slump is kept; The slump is low through time loss; The configuration concrete have higher flowability, good workability, and the sclerosis initial stage sufficient early strength is arranged.
The present invention adopts a still reaction method synthetic; The whole process of preparation organic solvent-free exists, no waste discharge, and technology is simple, reaction conditions is easy to control; With short production cycle, energy consumption is low, environmental protection, with low cost, to create good society, economic benefit will play active effect.
Embodiment
Polyether-type polycarboxylate water-reducer of the present invention, process by following mass percent by following monomer: monomer A: 0%～90%, monomers B: 0%～90%, monomer C:10～20%; Above-mentioned three kinds of monomeric mass percent sums are 100%; Wherein, monomer A is that molecular weight is 2000～2500 modified polyether; Monomers B is that molecular weight is 1000～1300 modified polyether; Monomer C is a vinylformic acid.Monomer A, monomers B and monomer C are technical grade, are commercially available.Are monomer A that is adopted in the embodiment of the invention and monomers B (to see http://www.huangma.com/pshow.asp for details by the allyl alcohol polyethenoxy ether that the model that Zhejiang Real Madrid chemical industry group company produces is respectively HMXB 53, HMXB 23? Id=176).
The preparation method of above-mentioned polyether-type polycarboxylate water-reducer is characterized in that, specifically comprises the steps:
1) under 50 ℃ of conditions, monomer A fully is dissolved in obtains the monomer A aqueous solution in the zero(ppm) water; Or monomers B fully is dissolved in obtain the monomers B aqueous solution in the zero(ppm) water; Or monomer A and monomers B fully are dissolved in obtain in the zero(ppm) water aqueous solution of monomer A and monomers B mixture; Then obtained aqueous solution is warming up to 75 ℃; The mass concentration of this aqueous solution is 50～70%;
2) the oxidized form initiator of adding total monomer quality 0.15～0.30% in obtained aqueous solution, this oxidized form initiator employing mass concentration are 1% ammonium persulfate aqueous solution;
3) using two tap funnels in flask, to splash into mass concentration simultaneously is that 25% acrylic acid aqueous solution and mass concentration are 1.0% compound aqueous solution, in 1.5～2.5 hours, dropwises;
Said compound aqueous solution is formulated by reduced form initiator and chain-transfer agent; Wherein, the quality of reduced form initiator is 0.2～0.5% of a total monomer quality, and the reduced form initiator adopts one or more among Sulfothiorine, ferrous sulfate, sodium sulfite anhy 96 or the vitamin V c; The quality of chain-transfer agent is 0.3～0.5% of a total monomer quality, and chain-transfer agent adopts one or more in Thiovanic acid, the Dodecyl Mercaptan; Described total monomer comprises monomer A, monomers B and monomer C.
4) be incubated 1～2 hour under 75 ℃ of conditions, be cooled to 30～50 ℃ then, add mass concentration again and be 30% NaOH solution regulating step 3) the pH value of gained solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer;
Embodiment 1
1) under 50 ℃ of conditions, 180 gram HMXB 53 and 120 gram zero(ppm) water are added flask, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% ammonium persulfate aqueous solution 30 grams;
3) in flask, splashing into mass concentration simultaneously through two tap funnels is that 25% acrylic acid aqueous solution, 80 grams and mass concentration are 1% compound aqueous solution 70 grams, dropwises in 2.5 hours; Compound aqueous solution is formulated by 0.2 gram Sulfothiorine and 0.5 gram Thiovanic acid;
4) insulation 1 hour under 75 ℃ of conditions is cooled to 30 ℃ then, adds mass concentration again and is 30% NaOH solution and come regulating step 3) pH value of gained solution, obtaining the pH value is 6.5～7.5 polyether-type polycarboxylate water-reducers.
Embodiment 2
1) under 50 ℃ of conditions, 40 gram HMXB, 53,130 gram HMXB 23 and 120 gram zero(ppm) water are added flask, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% ammonium persulfate aqueous solution 35 grams;
3) in flask, splashing into mass concentration simultaneously through two tap funnels is that 25% acrylic acid aqueous solution, 120 grams and mass concentration are 1% compound aqueous solution 70 grams, dropwises in 1.5 hours; Compound aqueous solution is formulated by 0.2 gram Sulfothiorine and 0.5 gram Thiovanic acid;
4) insulation 2 hours under 75 ℃ of conditions is cooled to 40 ℃ then, adds 30% NaOH solution again and comes regulating step 3) pH value of gained solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer.
Embodiment 3
1) under 50 ℃ of conditions, 90 gram HMXB, 53,90 gram HMXB 23 and 120g zero(ppm) water are added flask, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% ammonium persulfate aqueous solution 40 grams;
3) in flask, splashing into mass concentration simultaneously through two tap funnels is that 25% acrylic acid aqueous solution, 80 grams and mass concentration are 0.85% compound aqueous solution 70 grams; Compound aqueous solution is formulated by the Thiovanic acid that the Sulfothiorine and 0.3 of 0.4 gram restrains;
4) dropwise insulation 1.5 hours, be cooled to 50 ℃, slowly add 30% NaOH solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer.
Embodiment 4
1) under 50 ℃ of conditions, 135 gram HMXB, 53,45 gram HMXB 23 and 120 gram zero(ppm) water are added flask, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% the oxidized form initiator ammonium persulfate aqueous solution 45 grams;
3) in flask, splashing into mass concentration simultaneously through two tap funnels is that 25% acrylic acid aqueous solution, 80 grams and mass concentration are 1% compound aqueous solution 70 grams, dropwises in 2 hours; Compound aqueous solution is formulated by the Thiovanic acid that the Sulfothiorine and 0.35 of 0.35 gram restrains;
4) insulation 2 hours under the 75oC condition is cooled to 40 ℃ then, adds mass concentration again and is 30% NaOH solution and come regulating step 3) the pH value of gained solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer.
Embodiment 5
1) under 50 ℃ of conditions, 180g is restrained HMXB_23 and 120 gram zero(ppm) water adding flasks, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% the oxidized form initiator ammonium persulfate aqueous solution 50 grams;
3) in flask, splashing into mass concentration simultaneously through two tap funnels is that 25% acrylic acid aqueous solution, 80 grams and mass concentration are 1% compound aqueous solution 70 grams, dropwises in 2 hours; Compound aqueous solution is formulated by the Thiovanic acid that the Sulfothiorine and 0.3 of 0.4 gram restrains;
4) insulation 1.5 hours under 75 ℃ of conditions is cooled to 30 ℃ then, adds mass concentration again and is 30% NaOH solution and come regulating step 3) pH value of gained solution, obtaining the pH value is 6.5～7.5 polyether-type polycarboxylate water-reducers.
Reference examples
One, used monomer composition and proportioning are following:
Monomer D: molecular weight is 2200～2400 allyl polyethenoxy alcohol ethers (APEG), accounts for 90.9% of total monomer quality; Monomer C: account for 9.1% of total monomer quality;
Two, preparation technology is following:
1) under 50 ℃ of conditions, 180 gram APEG and 120 gram zero(ppm) water are added in the flask together, flask to be put into the water-bath that whisking appliance is housed heat, agitator is fully dissolved it, then obtained aqueous solution is warming up to 75 ℃;
2) in obtained aqueous solution, adding mass concentration is 1.0% the oxidized form initiator ammonium persulfate aqueous solution 45 grams;
3) in flask, slowly dripping mass percent respectively simultaneously through two tap funnels is 33.3% acrylic acid aqueous solution, 60 grams; 0.4 it is that 1% compound aqueous solution 70 restrains that the Thiovanic acid of the Sulfothiorine of gram and 0.3 gram is mixed with mass concentration, dropwises in 2 hours;
4) dropwise insulation 2 hours, be cooled to 40 ℃, slowly add mass concentration and be 30% NaOH solution 45 grams, obtaining the pH value is 6.5～7.5 polyether-type polycarboxylate water-reducers.
The application implementation example
Product performance: test by GB8077-2000 " concrete admixture uniformity TP ", reference cement 300 grams, when not mixing admixture, when water consumption is 185 grams, flowing degree of net paste of cement 185mm; When admixture (solid content 30%) volume was 0.5% (1.5 gram), test result was seen shown in the table 1.
Table 1 application performance test result
Visible by table 1 test result: in reference examples, uses the common big monomer of polyethers, the initial flow degree of its cement paste is very low, through the time lose very big; And the present invention increases significantly the initial flow degree of cement paste owing to introduced the big monomer of modified polyether, its cement paste through the time loss very little, promptly improved the maintenance performance of cement paste.From the wc of table 1 defined is 0.23 o'clock, and water-reducing rate reaches 62.70%, and hence one can see that: the water-reducing rate of institute of the present invention synthetic polyether-type polycarboxylate water-reducer is very high.Therefore, in actual use, the consumption with reducing cement and water reducer has greatly reduced cost.
Claims (6)
1. the preparation method of a polyether-type polycarboxylate water-reducer is characterized in that, specifically comprises the steps:
1) the polyether-type polycarboxylate water-reducer is processed by following mass percent by following monomer: monomer A: 0%～90%, and monomers B: 0%～90%, monomer C:10～20%; Above-mentioned three kinds of monomeric mass percent sums are 100%; Wherein, said monomer A is that molecular weight is 2000～2500 modified polyether; Said monomers B is that molecular weight is 1000～1300 modified polyether; Said monomer C is a vinylformic acid;
2) under 50 ℃ of conditions, monomer A fully is dissolved in obtains the monomer A aqueous solution in the zero(ppm) water; Or monomers B fully is dissolved in obtain the monomers B aqueous solution in the zero(ppm) water; Or monomer A and monomers B fully are dissolved in obtain in the zero(ppm) water aqueous solution of monomer A and monomers B mixture; Then obtained aqueous solution is warming up to 75 ℃; The mass concentration of this aqueous solution is 50～70%;
3) the oxidized form initiator of adding total monomer quality 0.15～0.30% in obtained aqueous solution, this oxidized form initiator employing mass concentration are 1% ammonium persulfate aqueous solution;
4) using two tap funnels in flask, to splash into mass concentration simultaneously is that 25% acrylic acid aqueous solution and mass concentration are 1.0% compound aqueous solution, in 1.5～2.5 hours, dropwises; Said compound aqueous solution is formulated by reduced form initiator and chain-transfer agent;
5) be incubated 1～2 hour under 75 ℃ of conditions, be cooled to 30～50 ℃ then, add mass concentration again and be 30% NaOH solution regulating step 4) the pH value of gained solution, obtain the pH value and be 6.5～7.5 polyether-type polycarboxylate water-reducer.
2. the method for claim 1 is characterized in that, said compound aqueous solution is formulated by reduced form initiator and chain-transfer agent; Wherein, the quality of reduced form initiator is 0.2～0.5% of a total monomer quality; The quality of chain-transfer agent is 0.3～0.5% of a total monomer quality, and described total monomer comprises monomer A, monomers B and monomer C.
3. method as claimed in claim 2 is characterized in that, said reduced form initiator adopts one or more among Sulfothiorine, ferrous sulfate, sodium sulfite anhy 96 or the vitamin V c.
4. method as claimed in claim 2 is characterized in that, said chain-transfer agent adopts one or more in Thiovanic acid, the Dodecyl Mercaptan.
5. method as claimed in claim 2 is characterized in that, the model that said monomer A adopts Zhejiang Real Madrid chemical industry group company to produce is respectively the allyl alcohol polyethenoxy ether of HMXB 53; The model that said monomers B adopts Zhejiang Real Madrid chemical industry group company to produce is the allyl alcohol polyethenoxy ether of HMXB 23.
6. the polyether-type polycarboxylate water-reducer of the described method of claim 1 preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101032250A CN102633951A (en) | 2012-04-10 | 2012-04-10 | Polyether polycarboxylic-acid water reducer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101032250A CN102633951A (en) | 2012-04-10 | 2012-04-10 | Polyether polycarboxylic-acid water reducer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102633951A true CN102633951A (en) | 2012-08-15 |
Family
ID=46618537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101032250A Pending CN102633951A (en) | 2012-04-10 | 2012-04-10 | Polyether polycarboxylic-acid water reducer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102633951A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875746A (en) * | 2012-10-19 | 2013-01-16 | 南京瑞迪高新技术有限公司 | Direct preparation method for high-solid-content ether polycarboxylate water reducer |
| CN103992444A (en) * | 2014-06-09 | 2014-08-20 | 湖南省多元新材料科技有限公司 | Preparation method of high-water-retentivity polycarboxylic acid water reducing agent mother solution |
| CN105504183A (en) * | 2016-01-11 | 2016-04-20 | 中国水电十一局有限公司混凝土外加剂厂 | Method for synthesis of ether type polycarboxylic acid water reducer |
| CN106146749A (en) * | 2016-06-27 | 2016-11-23 | 中建商品混凝土西安有限公司 | Meet polycarboxylate water-reducer of 620 meters of super high pump-conveying self-compacting concretes requirements and preparation method thereof |
| CN111793216A (en) * | 2020-07-06 | 2020-10-20 | 江苏奥莱特新材料股份有限公司 | Early-strength polycarboxylate water reducing agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538134A (en) * | 2009-04-14 | 2009-09-23 | 大连市建筑科学研究设计院股份有限公司 | Polyether class polycarboxylic acid high-efficiency water reducing agent and preparation method thereof |
| CN102161733A (en) * | 2011-01-27 | 2011-08-24 | 南京瑞迪高新技术公司 | Green preparation method of slow-release polycarboxylic-acid high-performance water reducing agent |
-
2012
- 2012-04-10 CN CN2012101032250A patent/CN102633951A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538134A (en) * | 2009-04-14 | 2009-09-23 | 大连市建筑科学研究设计院股份有限公司 | Polyether class polycarboxylic acid high-efficiency water reducing agent and preparation method thereof |
| CN102161733A (en) * | 2011-01-27 | 2011-08-24 | 南京瑞迪高新技术公司 | Green preparation method of slow-release polycarboxylic-acid high-performance water reducing agent |
Non-Patent Citations (1)
| Title |
|---|
| 宋家乐等: "聚醚型聚羧酸系减水剂的性能研究", 《混凝土与水泥制品》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875746A (en) * | 2012-10-19 | 2013-01-16 | 南京瑞迪高新技术有限公司 | Direct preparation method for high-solid-content ether polycarboxylate water reducer |
| CN102875746B (en) * | 2012-10-19 | 2014-11-12 | 南京瑞迪高新技术有限公司 | Direct preparation method for high-solid-content ether polycarboxylate water reducer |
| CN103992444A (en) * | 2014-06-09 | 2014-08-20 | 湖南省多元新材料科技有限公司 | Preparation method of high-water-retentivity polycarboxylic acid water reducing agent mother solution |
| CN105504183A (en) * | 2016-01-11 | 2016-04-20 | 中国水电十一局有限公司混凝土外加剂厂 | Method for synthesis of ether type polycarboxylic acid water reducer |
| CN106146749A (en) * | 2016-06-27 | 2016-11-23 | 中建商品混凝土西安有限公司 | Meet polycarboxylate water-reducer of 620 meters of super high pump-conveying self-compacting concretes requirements and preparation method thereof |
| CN111793216A (en) * | 2020-07-06 | 2020-10-20 | 江苏奥莱特新材料股份有限公司 | Early-strength polycarboxylate water reducing agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102358768B (en) | Modified ether polycarboxylic acid water reducing agent and preparation method thereof | |
| CN102603996B (en) | Ether type polycarboxylic acid slump retaining agent and preparation method thereof | |
| CN102432776B (en) | Method for preparing early strength type polycarboxylic acid water-reducing agent | |
| CN101830663B (en) | Collapse protective poly-carboxylic acid water reducing agent and preparation method thereof | |
| CN105601843B (en) | Ethers Early-strength polycarboxylate superplasticizer and preparation method thereof | |
| CN101508536B (en) | modified aliphatic water reducing agent and preparation method | |
| CN105254819A (en) | Room-temperature preparation method of early strength type polycarboxylate superplasticizer | |
| CN103396031B (en) | A kind of carboxylic acid water reducer and preparation method thereof | |
| CN103897116A (en) | Mud-resistant polycarboxylic acid water reducer and preparation method thereof | |
| CN102633951A (en) | Polyether polycarboxylic-acid water reducer and preparation method thereof | |
| CN102952243B (en) | Poly carboxylic acid water reducing agent adopting tartaric acid as chain transfer agent, and preparation method thereof | |
| CN103588414A (en) | High-performance polycarboxylic acid water reducer and special compound admixture containing the water reducer for limestone powder concrete | |
| CN104692699A (en) | Early strength type ether polycarboxylate superplasticizer and preparation method thereof | |
| CN105461866A (en) | Viscosity-reducing type polycarboxylic-acid water-reducing agent and preparation method thereof | |
| CN104628967A (en) | Early-strengthening polycarboxylate water reducer and preparation method thereof | |
| CN102603223A (en) | Polycarboxylic acid water reducer with solid raw materials and preparing process of the polycarboxylic acid water reducer | |
| CN102503221B (en) | Cyclohexanol grafted polycarboxylic acid water reducing agent and preparation method thereof | |
| CN102627744A (en) | Preparation method of ether amphoteric polycarboxylic acid water reducing agent | |
| CN101585900A (en) | Method for synthesizing polycarboxylic acid concrete high-performance water reducing agent | |
| CN102627425A (en) | Polycarboxylic acid water reducing agent and preparation method thereof | |
| CN102659338B (en) | Polycarboxylic water reducer applicable to manufactured sand and preparation method of polycarboxylic water reducer | |
| CN110643003B (en) | Preparation method of retarding type ester polycarboxylate superplasticizer | |
| CN102924669A (en) | Preparation method of polycarboxylate superplasticizer | |
| CN102206058B (en) | Ultra-high efficiency polycarboxylate water reducer and preparation method thereof | |
| CN102408528B (en) | Preparation method for polycarboxylic acid water reducer with strong adaptability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120815 |