CN108976358A - A kind of polycarboxylate water-reducer synthesis technology - Google Patents
A kind of polycarboxylate water-reducer synthesis technology Download PDFInfo
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- CN108976358A CN108976358A CN201810914664.7A CN201810914664A CN108976358A CN 108976358 A CN108976358 A CN 108976358A CN 201810914664 A CN201810914664 A CN 201810914664A CN 108976358 A CN108976358 A CN 108976358A
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- ethylene glycol
- weight
- methoxy poly
- added dropwise
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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
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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
- C04B24/2605—Macromolecular compounds 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
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of polycarboxylate water-reducer synthesis technologies, include the following steps: S1, deionized water is first added into reaction kettle, it is warming up to 90-95 DEG C, then puts into methoxy poly (ethylene glycol) simultaneously, methoxy poly (ethylene glycol) input amount is 2-2.5 times of deionized water weight；S2, it is to slowly warm up to 60-65 DEG C, hydrogen peroxide and deionized water is added after methoxy poly (ethylene glycol) all melts, at a temperature of 60-65 DEG C, stirred 10 minutes；S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect to be added dropwise to complete for 1.5 hours；S4, B2 material keep the temperature 1-1.5 hours at 60-65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 40-50 DEG C, the sodium hydroxide solution that concentration is 30-50% are then added dropwise, while stirring 30 minutes, until PH reaches 7 or so.Cost of the present invention is relatively low, and has wide adaptability, and most of concrete and construction environment can be suitable for by being able to use under the premise of not changing formula.
Description
Technical field
The present invention relates to a kind of concrete additives, more particularly to a kind of polycarboxylate water-reducer synthesis technology.
Background technique
Cement water reducing agent is a kind of under conditions of maintaining concrete slump to be basically unchanged, and can be reduced mixing water amount
Concrete admixture.Belong to anionic surfactant mostly, there is lignosulfonates, naphthalene sulphonate formaldehyde polymer etc..
There is peptizaiton to cement granules after concrete mix is added, its workability can be improved, reduce unit consumption of water, improves coagulation
The mobility of native mixture；Or unit cement consumption is reduced, save cement.
Currently, cement water reducing agent has been obtained for being widely applied, and its manufacturing process is also very mature, is also exactly
In this way, just causing its market competition larger, if enterprise certainly will cause enterprise is on the verge of being replaced to obtain danger without differential competition
Danger.And the performance of cement water reducing agent is substantially convergent at present, and cost is also substantially stable, is produced into if it cannot be reduced
This, certainly will cause enterprise not have market competition advantage.
Therefore, applicant proposes a kind of polycarboxylate water-reducer synthesis technology, and manufacturing process is simple, and cost is than the prior art
It is at low cost.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of polycarboxylic acids diminishings
Agent synthesis technology.
To achieve the above object, the present invention provides a kind of polycarboxylate water-reducer synthesis technology, include the following steps:
S1, deionized water is first added into reaction kettle, is warming up to 90-95 DEG C, then put into methoxy poly (ethylene glycol), methoxy simultaneously
Base the amount of polyethylene glycol is 2-2.5 times of deionized water weight；
S2, it is to slowly warm up to 60-65 DEG C, hydrogen peroxide and deionized water is added after methoxy poly (ethylene glycol) all melts,
At a temperature of 60-65 DEG C, stir 10 minutes；
The hydrogen peroxide weight of addition is 0.003-0.005 times of methoxy poly (ethylene glycol), concentration 30-35%；
The deionized water weight of addition is 0.06-0.1 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5-6 parts of ammonium persulfate, ascorbic acid 3- according to the corresponding portion rate of weight
4 parts are dissolved into 700-750 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 65-70:15-20；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 140-150:35-40；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:5-6；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:65-70 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:140-150；
S4, B2 material keep the temperature 1-1.5 hours at 60-65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 40-50 DEG C, so
The sodium hydroxide solution that concentration is 30-50% is added dropwise afterwards, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
In 35-40%, water-reducing agent can be obtained.
The beneficial effects of the present invention are: cost of the present invention is relatively low, and has wide adaptability, do not changing formula
Under the premise of be able to use and can be suitable for most of concrete and construction environment, it is simultaneous and when needing to carry out secondary compounding
Capacitive is preferable, will not influence compounding effect.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Embodiment one
A kind of polycarboxylate water-reducer synthesis technology, includes the following steps:
S1, deionized water is first added into reaction kettle, is warming up to 92 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2 times of deionized water weight；
S2,64 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 64 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.004 times of methoxy poly (ethylene glycol), concentration 32%；
The deionized water weight of addition is 0.08 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5.5 parts of ammonium persulfate, ascorbic acid according to the corresponding portion rate of weight
3.5 parts are dissolved into 720 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 68:18；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 148:37；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:5.5；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:68 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:148；
S4, B2 material keep the temperature 1.2 hours at 65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 45 DEG C, are then added dropwise dense
The sodium hydroxide solution that degree is 40%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
40%, water-reducing agent can be obtained.
Embodiment two
A kind of polycarboxylate water-reducer synthesis technology, includes the following steps:
S1, deionized water is first added into reaction kettle, is warming up to 95 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2.3 times of deionized water weight；
S2,62 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 62 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.046 times of methoxy poly (ethylene glycol), concentration 35%；
The deionized water weight of addition is 0.06 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5.2 parts of ammonium persulfate, ascorbic acid according to the corresponding portion rate of weight
3.8 parts are dissolved into 740 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 66:16；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 145:38；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:5.2；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:66 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:145；
S4, B2 material keep the temperature 1.3 hours at 60-65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 48 DEG C, are then added dropwise
The sodium hydroxide solution that concentration is 35%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
38%, water-reducing agent can be obtained.
Embodiment three
A kind of polycarboxylate water-reducer synthesis technology, includes the following steps:
S1, deionized water is first added into reaction kettle, is warming up to 91 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2 times of deionized water weight；
S2,65 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 65 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.005 times of methoxy poly (ethylene glycol), concentration 30%；
The deionized water weight of addition is 0.07 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5 parts of ammonium persulfate, 4 parts of ascorbic acid according to the corresponding portion rate of weight
It is dissolved into 730 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 65:17；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 150:40；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:6；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:65 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:147；
S4, B2 material keep the temperature 1.5 hours at 65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 45 DEG C, are then added dropwise dense
The sodium hydroxide solution that degree is 50%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
37%, water-reducing agent can be obtained.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (8)
1. a kind of polycarboxylate water-reducer synthesis technology, which comprises the steps of:
S1, deionized water is first added into reaction kettle, is warming up to 90-95 DEG C, then put into methoxy poly (ethylene glycol), methoxy simultaneously
Base the amount of polyethylene glycol is 2-2.5 times of deionized water weight；
S2, it is to slowly warm up to 60-65 DEG C, hydrogen peroxide and deionized water is added after methoxy poly (ethylene glycol) all melts,
At a temperature of 60-65 DEG C, stir 10 minutes；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
S4, B2 material keep the temperature 1-1.5 hours at 60-65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 40-50 DEG C, so
The sodium hydroxide solution that concentration is 30-50% is added dropwise afterwards, while stirring 30 minutes, until PH reaches 7 or so.
2. polycarboxylate water-reducer synthesis technology as described in claim 1, which comprises the steps of: in S3, A material
Configuration: following components is taken out into mixing: 5-6 parts of ammonium persulfate, 3-4 parts of ascorbic acid dissolutions according to the corresponding portion rate of weight
Enter 700-750 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 65-70:15-20；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 140-150:35-40.
3. polycarboxylate water-reducer synthesis technology as claimed in claim 2, which is characterized in that the over cure in S3, in the A material of dropwise addition
Sour ammonium and methoxy poly (ethylene glycol) weight ratio are 2000:5-6；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:65-70 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:140-150.
4. polycarboxylate water-reducer synthesis technology as described in claim 1, which is characterized in that in S2, the hydrogen peroxide weight of addition
It is 0.003-0.005 times of methoxy poly (ethylene glycol), concentration 30-35%；
The deionized water weight of addition is 0.06-0.1 times of methoxy poly (ethylene glycol).
5. polycarboxylate water-reducer synthesis technology as described in claim 1, which is characterized in that further include following steps: S5, detection
Solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is maintained at 35-40%, i.e.,
It can get water-reducing agent.
6. polycarboxylate water-reducer synthesis technology a method as claimed in any one of claims 1 to 5, which comprises the steps of:
S1, deionized water is first added into reaction kettle, is warming up to 92 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2 times of deionized water weight；
S2,64 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 64 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.004 times of methoxy poly (ethylene glycol), concentration 32%；
The deionized water weight of addition is 0.08 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5.5 parts of ammonium persulfate, ascorbic acid according to the corresponding portion rate of weight
3.5 parts are dissolved into 720 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 68:18；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 148:37；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:5.5；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:68 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:148；
S4, B2 material keep the temperature 1.2 hours at 65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 45 DEG C, are then added dropwise dense
The sodium hydroxide solution that degree is 40%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
40%, water-reducing agent can be obtained.
7. the polycarboxylate water-reducer synthesis technology as described in claim 1-6 is any, which comprises the steps of:
S1, deionized water is first added into reaction kettle, is warming up to 95 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2.3 times of deionized water weight；
S2,62 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 62 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.046 times of methoxy poly (ethylene glycol), concentration 35%；
The deionized water weight of addition is 0.06 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5.2 parts of ammonium persulfate, ascorbic acid according to the corresponding portion rate of weight
3.8 parts are dissolved into 740 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 66:16；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 145:38；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:5.2；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:66 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:145；
S4, B2 material keep the temperature 1.3 hours at 60-65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 48 DEG C, are then added dropwise
The sodium hydroxide solution that concentration is 35%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
38%, water-reducing agent can be obtained.
8. the polycarboxylate water-reducer synthesis technology as described in claim 1-6 is any, which comprises the steps of:
S1, deionized water is first added into reaction kettle, is warming up to 91 DEG C, then put into methoxy poly (ethylene glycol), methoxyl group simultaneously
The amount of polyethylene glycol is 2 times of deionized water weight；
S2,65 DEG C are to slowly warm up to, hydrogen peroxide and deionized water are added after methoxy poly (ethylene glycol) all melts, at 65 DEG C
At a temperature of, it stirs 10 minutes；
The hydrogen peroxide weight of addition is 0.005 times of methoxy poly (ethylene glycol), concentration 30%；
The deionized water weight of addition is 0.07 times of methoxy poly (ethylene glycol)；
S3, A material and B1 material is added dropwise, B2 material is added dropwise in B1 material again after adding；A material is added dropwise to complete for 3.5 hours, B1 material, B2 expect 1.5 hours
It is added dropwise to complete；
A material configuration: following components is taken out into mixing: 5 parts of ammonium persulfate, 4 parts of ascorbic acid according to the corresponding portion rate of weight
It is dissolved into 730 parts of softened waters；
B1 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 65:17；
B2 material configuration: by acrylic acid and softened water according to parts by weight than being mixed for the ratio of 150:40；
Ammonium persulfate and methoxy poly (ethylene glycol) weight ratio in the A material of dropwise addition are 2000:6；
Acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:65 in the B1 material of dropwise addition；
In the B2 material of dropwise addition, acrylic acid and methoxy poly (ethylene glycol) weight ratio are 2000:147；
S4, B2 material keep the temperature 1.5 hours at 65 DEG C again after being added dropwise to complete and are reacted, and are subsequently cooled to 45 DEG C, are then added dropwise dense
The sodium hydroxide solution that degree is 50%, while stirring 30 minutes, until PH reaches 7 or so；
S5, detection solid content, and solid content is adjusted heating evaporation or by way of deionized water is added, so that solid content is kept
37%, water-reducing agent can be obtained.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503227A (en) * | 2011-10-27 | 2012-06-20 | 北京东方雨虹防水技术股份有限公司 | Early-strength polycarboxylic acid water reducing agent |
| CN102718426A (en) * | 2012-06-21 | 2012-10-10 | 马清浩 | Modified carboxylic acid water-reducing agent and preparation method thereof |
| CN103708760A (en) * | 2013-12-23 | 2014-04-09 | 宁波中水科化工科技有限公司 | Slow-setting polycarboxylic acid water reducing agent and preparation method thereof |
| JP2017186248A (en) * | 2016-03-31 | 2017-10-12 | 株式会社日本触媒 | Admixture composition |
-
2018
- 2018-08-13 CN CN201810914664.7A patent/CN108976358A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503227A (en) * | 2011-10-27 | 2012-06-20 | 北京东方雨虹防水技术股份有限公司 | Early-strength polycarboxylic acid water reducing agent |
| CN102718426A (en) * | 2012-06-21 | 2012-10-10 | 马清浩 | Modified carboxylic acid water-reducing agent and preparation method thereof |
| CN103708760A (en) * | 2013-12-23 | 2014-04-09 | 宁波中水科化工科技有限公司 | Slow-setting polycarboxylic acid water reducing agent and preparation method thereof |
| JP2017186248A (en) * | 2016-03-31 | 2017-10-12 | 株式会社日本触媒 | Admixture composition |
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Application publication date: 20181211 |