CN102584094B - Polycarboxylic acid slump retaining agent for concrete and preparation method thereof - Google Patents
Polycarboxylic acid slump retaining agent for concrete and preparation method thereof Download PDFInfo
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- CN102584094B CN102584094B CN 201210062369 CN201210062369A CN102584094B CN 102584094 B CN102584094 B CN 102584094B CN 201210062369 CN201210062369 CN 201210062369 CN 201210062369 A CN201210062369 A CN 201210062369A CN 102584094 B CN102584094 B CN 102584094B
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Abstract
The invention relates to a polycarboxylic acid slump retaining agent for concrete and a preparation method thereof, belonging to the technical field of concrete slump retaining agents. The polycarboxylic acid slump retaining agent for concrete comprises the following components in percentage by weight: 20-50% of polyoxypropylene ether, 25-60% of water, 3-5% of hydrogen peroxide, 10-15% of acrylic acid, 2-3% of mercapto acid and 1-2% of ascorbic acid. The preparation method comprises the following technological steps of: (1) adding polyoxypropylene ether and water into a reaction container, dissolving polyoxypropylene ether in water under the condition of stirring, and adjusting the ph value to 4-6 by using acrylic acid; (2) adding hydrogen peroxide into the reaction container, and dissolving hydrogen peroxide through stirring; (3) dissolving the rest acrylic acid, mercapto acid and ascorbic acid in water, and adding the solution into the reaction container in 3-5 hours; (4) reacting and maintaining the temperature for 1-2 hours; and (5) adjusting the ph value to 6-7 by using sodium hydroxide, and adding water to dilute to obtain the polycarboxylic acid slump retaining agent for concrete. The polycarboxylic acid slump retaining agent for concrete has good adaptability to cement and has the advantages of high plasticizing property, water-reducing rate, environmental protection, stable quality, reliable technology, high production efficiency, convenience for industrial production and the like.
Description
Technical field
The invention belongs to the concrete slump retaining agent technical field, particularly relate to a kind of polycarboxylic acid slump retaining agent for concrete and preparation method thereof.
Background technology
At present, existing polycarboxylic acid slump retaining agent does not have water-reducing rate, and protect plasticity can be very unstable, and when concrete delivery arrived the building site, loss of slump was too large or anti-sheet is very large, causes the concrete workability variation, can stop up during pumping and don't manage, and incurs loss through delay construction speed.Need in production process to use a large amount of organic solvents, environmental pollution is serious.Existing polycarboxylic acid slump retaining agent exists quality unstable in the concrete use procedure, affects the technical problems such as concrete construction.
Summary of the invention
The problem that the present invention exists for solving prior art provides a kind of polycarboxylic acid slump retaining agent for concrete and preparation method thereof.
One of the object of the invention is to carry that arch is a kind of to have high guarantor and mould, and water-reducing rate is arranged, and environment-friendly type is easy to use, handling ease, constant product quality, the polycarboxylic acid slump retaining agent for concrete of production efficiency high.
Ph value, the increase xitix of the present invention by regulating the polyethenoxy ether aqueous solution, the stability of raising product makes product have stable protect plasticity, and has water-reducing rate.
Polycarboxylic acid slump retaining agent for concrete of the present invention adopts following technical scheme:
A kind of polycarboxylic acid slump retaining agent for concrete is characterized in: the weight percent of each component of polycarboxylic acid slump retaining agent is,
Two of the object of the invention is to provide a kind of process that has, and is easy to operate, simple, constant product quality, and high guarantor moulded, and is convenient to the preparation method of the polycarboxylic acid slump retaining agent for concrete of the characteristics such as suitability for industrialized production.
The preparation method of polycarboxylic acid slump retaining agent for concrete of the present invention adopts following technical scheme:
A kind of preparation method of polycarboxylic acid slump retaining agent for concrete is characterized in: preparation comprises that the following technique step is poly-,
(1) polyethenoxy ether and water are added reaction vessel, make polyethenoxy ether water-soluble under agitation condition, regulate the ph value to 4-6 with vinylformic acid;
(2) hydrogen peroxide is added in reaction vessel, stir and make the hydrogen peroxide dissolving;
(3) acid of remaining vinylformic acid, mercapto, xitix is soluble in water, joined in reaction vessel with 3-5 hour;
(4) the reaction insulation is 1-2 hour;
(5) regulate the ph value to 6-7 with sodium hydroxide, thin up obtains polycarboxylic acid slump retaining agent for concrete.
The preparation method of polycarboxylic acid slump retaining agent for concrete of the present invention can also adopt following technical measures:
The preparation method of described polycarboxylic acid slump retaining agent for concrete is characterized in: preparation comprises that the following technique step is poly-,
(1) polyethenoxy ether and water are added reaction vessel after, under agitation condition, control 60-80 ℃ of temperature and make polyethenoxy ether water-soluble;
(2) hydrogen peroxide is added reaction vessel after, stir and made hydrogen peroxide dissolving in 10-20 minute;
(3) after the acid of remaining vinylformic acid, mercapto, xitix is soluble in water, be added drop-wise in reaction vessel with 3-5 hour;
(4) the reaction insulation is 1-2 hour;
(5) regulate the ph value to 6-7 with sodium hydroxide, thin up obtains polycarboxylic acid slump retaining agent for concrete.
The advantage that the present invention has and positively effect:
Polycarboxylic acid slump retaining agent for concrete and preparation method thereof owing to adopting the brand-new technical scheme of the present invention, therefore, has following distinguishing feature:
1. product has stable plastic property and has water-reducing rate;
2. speed of reaction is fast, save energy, and the finished product transformation efficiency is high;
3. the adjusting starting ph, make product performance stable, and do not increase acrylic acid consumption;
4. by improving temperature of reaction and adding xitix, improve the efficient of initiator, reduce initiator amount, stabilized product quality;
5. do not use any organic solvent, and do not discharge any waste water, waste gas in production process, belong to the environment friendly green product.
The present invention is good to cement adaptability, has high guarantor and moulds, and water-reducing rate, product environmental protection, easy to use are arranged, steady quality, and process, easy to operate, simple, production efficiency is high, is convenient to the advantages such as suitability for industrialized production.
Embodiment
For further understanding technology contents of the present invention, Characteristic, hereby enumerate following instance, and be described in detail as follows:
Embodiment 1
A kind of polycarboxylic acid slump retaining agent for concrete, the weight percent of its each component is:
Embodiment 2
A kind of preparation method of polycarboxylic acid slump retaining agent for concrete, its preparation comprises that the following technique step is poly-:
1. 40g polyethenoxy ether and 10g water are added reaction vessel, be warmed up to 60 ℃ and make polyethenoxy ether water-soluble.Regulate the ph value between 4-6 with vinylformic acid.
2. the 3g hydrogen peroxide is joined in reactor, stirred 10-20 minute, hydrogen peroxide is fully dissolved.
3. remaining vinylformic acid (amount to 10g) and 2g mercapto is sour, 1g xitix is dissolved in a small amount of water, is added drop-wise to reaction vessel within 3-5 hour.
4. after dripping, be incubated 1-2 hour.
5. regulate ph value (6-7) with sodium hydroxide, thin up to 40% had both obtained polycarboxylic acid slump retaining agent for concrete.
Embodiment 3
A kind of preparation method of polycarboxylic acid slump retaining agent for concrete, its preparation comprises that the following technique step is poly-:
1. 50g polyethenoxy ether and 20g water are added reaction vessel, be warmed up to 80 ℃ and make polyethenoxy ether water-soluble.Regulate the ph value between 4-6 with vinylformic acid.
2. the 5g hydrogen peroxide is joined in reaction vessel, stirred 10-20 minute, hydrogen peroxide is fully dissolved.
3. remaining vinylformic acid (amount to 15g) and 3g mercapto is sour, 2g xitix is dissolved in a small amount of water, is added drop-wise to reaction vessel within 3-5 hour.
4. after dripping, be incubated 1-2 hour.
5. regulate ph value (6-7) with sodium hydroxide, thin up to 40% had both obtained polycarboxylic acid slump retaining agent for concrete.
Claims (1)
1. the preparation method of a polycarboxylic acid slump retaining agent for concrete, it is characterized in that: the weight percent of each component of polycarboxylic acid slump retaining agent is polyethenoxy ether 20-50, water 25-60, hydrogen peroxide 3-5, vinylformic acid 10-15, mercapto acid 2-3, xitix 1-2; Preparation comprises that the following technique step is poly-,
(1) polyethenoxy ether and water are added reaction vessel, under agitation condition, control 60-80 ℃ of temperature and make polyethenoxy ether water-soluble, use the propylene acid for adjusting pH value to 4-6;
(2) hydrogen peroxide is added in reaction vessel, stir and make the hydrogen peroxide dissolving;
(3) acid of remaining vinylformic acid, mercapto, xitix is soluble in water, joined in reaction vessel with 3-5 hour;
(4) the reaction insulation is 1-2 hour;
(5) regulate the pH value to 6-7 with sodium hydroxide, thin up obtains polycarboxylic acid slump retaining agent for concrete.
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| CN 201210062369 CN102584094B (en) | 2012-03-09 | 2012-03-09 | Polycarboxylic acid slump retaining agent for concrete and preparation method thereof |
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| CN 201210062369 CN102584094B (en) | 2012-03-09 | 2012-03-09 | Polycarboxylic acid slump retaining agent for concrete and preparation method thereof |
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| CN102584094A CN102584094A (en) | 2012-07-18 |
| CN102584094B true CN102584094B (en) | 2013-11-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739789A (en) * | 2013-12-31 | 2014-04-23 | 大连市铭源全科技开发有限公司 | Simple synthesis method for polycarboxylic acid water reducer |
| CN103819628B (en) * | 2013-12-31 | 2016-08-17 | 大连市铭源全科技开发有限公司 | A kind of water reducer with concrete workability regulatory function and synthetic method thereof |
| CN103755886B (en) * | 2013-12-31 | 2016-05-11 | 大连市铭源全科技开发有限公司 | A kind of ultra early-strength water reducer and processing method thereof |
| CN103724560B (en) * | 2013-12-31 | 2016-04-13 | 大连市铭源全科技开发有限公司 | A kind of superpower slump retaining agent and working method thereof |
| CN106519141B (en) * | 2016-11-15 | 2018-11-13 | 湖北工业大学 | A kind of width molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent masterbatch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
| CN102030494A (en) * | 2010-11-12 | 2011-04-27 | 河北金舵建材科技开发有限公司 | High-performance polycarboxylate water reducing agent and low-temperature one-step preparation method thereof |
| CN102140018A (en) * | 2010-11-24 | 2011-08-03 | 辽宁奥克化学股份有限公司 | Concrete polycarboxylate water reducer and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
| CN102030494A (en) * | 2010-11-12 | 2011-04-27 | 河北金舵建材科技开发有限公司 | High-performance polycarboxylate water reducing agent and low-temperature one-step preparation method thereof |
| CN102140018A (en) * | 2010-11-24 | 2011-08-03 | 辽宁奥克化学股份有限公司 | Concrete polycarboxylate water reducer and preparation method thereof |
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Effective date of registration: 20180305 Address after: 300162 Tianjin Dongli District Dongli Lake Wanke city education complex science and technology building 202-1 room Patentee after: Tianjin Shiji Tianyuan Group Co., Ltd. Address before: 300300 Xinli street, Dongli District, Tianjin City, three villages Patentee before: Tianjin Nuode Building Materials Co., Ltd. |
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