CN107840929A - The preparation method of polycarboxylate water-reducer - Google Patents
The preparation method of polycarboxylate water-reducer Download PDFInfo
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- CN107840929A CN107840929A CN201711240239.6A CN201711240239A CN107840929A CN 107840929 A CN107840929 A CN 107840929A CN 201711240239 A CN201711240239 A CN 201711240239A CN 107840929 A CN107840929 A CN 107840929A
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- stage
- added
- reducer
- water
- polycarboxylate water
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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
-
- 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
-
- 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 present invention discloses a kind of preparation method of polycarboxylate water-reducer, is related to concrete admixture preparing technical field.It includes following two stages：First stage：Under agitation, acrylic acid, vitamin C, thiohydracrylic acid, methyl allyl polyoxyethylene ether monomer and ammonium persulfate are added into reactor, and is heated to 60 DEG C ± 5 DEG C, insulation reaction 1 hour~5 hours；Then, defoamer, air entraining agent, thickener, preservative then into the reactor are added, is stirred；Second stage：Retarder is added into the material obtained by the first stage and water stirs.The present invention by adding vitamin C is used as one of reaction raw materials, and the effect of being modified is served to product polycarboxylate water-reducer, improves its water-reducing effect and guarantor is collapsed effect.
Description
Technical field
The present invention relates to the preparation method of concrete admixture preparing technical field, especially polycarboxylate water-reducer.
Background technology
Polycarboxylate water-reducer is a kind of high-performance water reducing agent, is that prepared by cement concrete, a kind of cement in construction disperses
Agent.It is widely used in the engineerings such as highway, bridge, dam, tunnel, skyscraper.
However, some defects mostly be present in current market sales of product polycarboxylate water-reducer, such as：As engineering is applied
Work and application in concrete structure durability and the requirement more and more higher of intensity, it is desirable to develop volume is low, water-reducing rate is high,
Slump rheological parameters' change with time is small, energy consumption is low, the high-quality polycarboxylate water-reducer of safety and environmental protection, therefore, being attempted to polycarboxylic acids diminishing
The preparation method of agent is improved.
The content of the invention
The present invention provides a kind of preparation method of polycarboxylate water-reducer, and it can solve existing polycarboxylate water-reducer presence and mix
The problem of amount is high, water-reducing rate is small, slump rheological parameters' change with time is big.
In order to solve the above problems, the technical solution adopted by the present invention is：
It includes following two stages：
First stage：Under agitation, acrylic acid, vitamin C, thiohydracrylic acid, methacrylic are added into reactor to gather
Oxygen vinyl ether monomers, ammonium persulfate, and 60 DEG C ± 5 DEG C are heated to, insulation reaction 1 hour~5 hours；Then, then to the reaction
Defoamer, air entraining agent, thickener, preservative are added in device, is stirred；
Second stage：Retarder is added into the material obtained by the first stage and water stirs.
In above-mentioned technical proposal, more specifically technical scheme can also be：By weight, the acrylic acid 1.5 parts~2
Part, 0.1 part~0.5 part of vitamin C, 2 parts~4 parts of thiohydracrylic acid, 20 parts~30 parts of methyl allyl polyoxyethylene ether monomer with
And 0.5 part~1 part of ammonium persulfate.
, it is necessary to which explanation is in above-mentioned technical proposal：The two ranks in the preparation method of polycarboxylic acids water reducers of the present invention
Section is not usually to be carried out continuously, wherein, the material obtained by the first stage uses as polycarboxylate superplasticizer mother liquor, when being connected to visitor
When family order is sold, production, which just carries out second stage, to be required to the different of properties of product according to client.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：
1. the present invention is used as one of reaction raw materials by adding vitamin C, product polycarboxylate water-reducer is served and has been modified work
With improving its water-reducing effect and guarantor collapsed effect.
2. the present invention avoids the generation of deleterious bubbles by adding defoamer, so as to solving because of the presence of pernicious gas
The low strength of concrete is easily caused, the generation of quality accident occurs；Air entraining agent is added, improves the bleed work(of polycarboxylate water-reducer
Energy, avoid easily causing hardened, plugging the phenomenon of concrete when using；Thickener is added, avoids causing concrete when using
Isolation, bleeding, influence the volume stability after the pumping and solidification of concrete, durability, impermeability etc.；Add preservative,
Avoid it from occurring in high temperature season putrid and deteriorated, influence properties of product.
Embodiment
With reference to embodiment, the invention will be further described：
The preparation method of embodiment 1 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, added into reactor 1.5kg acrylic acid, 0.1kg vitamin Cs, 2kg thiohydracrylic acids,
20kg methyl allyl polyoxyethylene ethers monomer and 0.5kg ammonium persulfates, and 60 DEG C are heated to, insulation reaction 5 hours；So
Afterwards, then into the reactor 0.1kg defoamers, 0.1kg air entraining agents, 0.1kg thickeners, 0.1kg preservatives are added, stirring is equal
It is even；
Second stage：0.1kg retarder and 2.9kg water are added into the material obtained by the first stage, is stirred.
The preparation method of embodiment 2 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, added into reactor 2kg acrylic acid, 0.5kg vitamin Cs, 4kg thiohydracrylic acids,
30kg methyl allyl polyoxyethylene ethers monomer and 1kg ammonium persulfates, and 130 DEG C are heated to, insulation reaction 1 hour；Then,
0.05kg defoamers, 0.05kg air entraining agents, 0.05kg thickeners, 0.05kg preservatives are added into the reactor again, stirring is equal
It is even；
Second stage：0.05kg retarder and 3.7kg water are added into the material obtained by the first stage, is stirred.
The preparation method of embodiment 3 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, added into reactor 1.8kg acrylic acid, 0.4kg vitamin Cs, 3kg thiohydracrylic acids,
26kg methyl allyl polyoxyethylene ethers monomer and 0.8kg ammonium persulfates, and 80 DEG C are heated to, insulation reaction 4 hours；So
Afterwards, then into the reactor 0.06kg defoamers, 0.06kg air entraining agents, 0.06kg thickeners, 0.06kg preservatives, stirring are added
Uniformly；
Second stage：0.06kg retarder and 3.2kg water are added into the material obtained by the first stage, is stirred.
The preparation method of comparative example 1 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, 1.5kg acrylic acid, 2kg thiohydracrylic acids, 20kg methallyls are added into reactor
Base polyoxyethylene ether monomer and 0.5kg ammonium persulfates, and 60 DEG C are heated to, insulation reaction 5 hours；Then, then to the reaction
0.1kg defoamers, 0.1kg air entraining agents, 0.1kg thickeners, 0.1kg preservatives are added in device, is stirred；
Second stage：0.1kg retarder and 2.5kg water are added into the material obtained by the first stage, is stirred.
The preparation method of comparative example 2 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, 2kg acrylic acid, 4kg thiohydracrylic acids, 30kg methacrylics are added into reactor
Polyoxyethylene ether monomer and 1kg ammonium persulfates, and 50 DEG C are heated to, insulation reaction 1 hour；Then, then into the reactor
0.05kg defoamers, 0.05kg air entraining agents, 0.05kg thickeners, 0.05kg preservatives are added, is stirred；
Second stage：0.05kg retarder is added into the material obtained by the first stage and 3.7kg water stirs.
The preparation method of comparative example 3 --- polycarboxylate water-reducer
It includes following two stages：
First stage：Under agitation, 1.8kg acrylic acid, 3kg thiohydracrylic acids, 26kg methallyls are added into reactor
Base polyoxyethylene ether monomer and 0.8kg ammonium persulfates, and 80 DEG C are heated to, insulation reaction 4 hours；Then, then to the reaction
0.06kg defoamers, 0.06kg air entraining agents, 0.06kg thickeners, 0.06kg preservatives are added in device, is stirred；
Second stage：Into the material obtained by the first stage add 0.06kg retarder and with 3.2kg water, stir.
Performance detection
With reference to standard GB/T/T8077-2012《Concrete admixture homogeneous》Tested, its result is as shown in table 1.
Table 1
From above-mentioned table 1, it can be seen that polycarboxylate water-reducer produced by the present invention have preferably preferably water-reduction and compared with
Good guarantor's effect of collapsing.
Claims (2)
1. a kind of preparation method of polycarboxylate water-reducer, it is characterised in that including following two stages：
First stage：Under agitation, acrylic acid, vitamin C, thiohydracrylic acid, methacrylic are added into reactor to gather
Oxygen vinyl ether monomers and ammonium persulfate, and 60 DEG C ± 5 DEG C are heated to, insulation reaction 1 hour~5 hours；Then, it is then anti-to this
Answer and defoamer, air entraining agent, thickener, preservative are added in device, stir；
Second stage：Retarder is added into the material obtained by the first stage and water stirs.
A kind of 2. preparation method of polycarboxylate water-reducer according to claim 1, it is characterised in that：By weight, institute
State 1.5 parts~2 parts of acrylic acid, 0.1 part~0.5 part of vitamin C, 2 parts~4 parts of thiohydracrylic acid, methyl allyl polyoxyethylene ether
0.5 part~1 part of 20 parts~30 parts of monomer and ammonium persulfate.
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| CN201711240239.6A CN107840929A (en) | 2017-11-30 | 2017-11-30 | The preparation method of polycarboxylate water-reducer |
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| CN201711240239.6A CN107840929A (en) | 2017-11-30 | 2017-11-30 | The preparation method of polycarboxylate water-reducer |
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| CN107840929A true CN107840929A (en) | 2018-03-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721272A (en) * | 2019-01-03 | 2019-05-07 | 河海大学 | A kind of magnesia retarder based on multi-vitamins, combined oxidation magnesium and application |
| CN109867486A (en) * | 2019-03-23 | 2019-06-11 | 杭州构建新型材料有限公司 | A kind of dedicated water conservation additive of high temperature resistant concrete and its preparation process, application |
| CN111978009A (en) * | 2020-08-31 | 2020-11-24 | 宁夏科润建材科技有限公司 | Highway concrete water reducing agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986970A (en) * | 2017-04-28 | 2017-07-28 | 江苏尼高科技有限公司 | The preparation method of high-performance solid polycarboxylate water-reducer |
-
2017
- 2017-11-30 CN CN201711240239.6A patent/CN107840929A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986970A (en) * | 2017-04-28 | 2017-07-28 | 江苏尼高科技有限公司 | The preparation method of high-performance solid polycarboxylate water-reducer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721272A (en) * | 2019-01-03 | 2019-05-07 | 河海大学 | A kind of magnesia retarder based on multi-vitamins, combined oxidation magnesium and application |
| CN109721272B (en) * | 2019-01-03 | 2020-02-18 | 河海大学 | Magnesium oxide retarder based on composite vitamins, composite magnesium oxide and application |
| CN109867486A (en) * | 2019-03-23 | 2019-06-11 | 杭州构建新型材料有限公司 | A kind of dedicated water conservation additive of high temperature resistant concrete and its preparation process, application |
| CN109867486B (en) * | 2019-03-23 | 2021-09-24 | 杭州构建新型材料有限公司 | Special water-retaining additive for high-temperature-resistant concrete and preparation process and application thereof |
| CN111978009A (en) * | 2020-08-31 | 2020-11-24 | 宁夏科润建材科技有限公司 | Highway concrete water reducing agent |
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Application publication date: 20180327 |