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High-performance water reducer of polycarboxylic acid, and preparation method thereof

A high-performance, water-reducing agent technology, applied in the field of concrete admixtures in the construction industry, can solve the problems of difficult to meet concrete technology and requirements, poor slump retention, high alkali content, high water-reducing rate, low cost, Excellent product performance

Active Publication Date: 2012-12-12
山西科腾环保新材料股份有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] With the continuous improvement of high-strength high-performance concrete technology and construction, the existing high-efficiency water reducers include naphthalene-based high-efficiency water-reducers, melamine-based high-efficiency water-reducers, sulfamate water-reducers and aliphatic water-reducers etc., due to its low water reducing rate, poor slump retention, easy to cause obvious retarding effect, high alkali content and other factors, it is difficult to meet the technology and requirements of modern concrete

Method used

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  • High-performance water reducer of polycarboxylic acid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the preparation of polycarboxylate high-performance water reducing agent:

[0027] The present embodiment selects following raw material:

[0028] Methyl vinyl polyoxyethylene ether (TPEG) 300.0g

[0029] Acrylic acid 12.5g

[0030] Maleic anhydride 34.58g

[0031] Sodium methacrylate 21.08g

[0032] 3-mercaptopropionic acid 1.0g

[0033] Potassium peroxodisulfate 7.50g

[0034] The specific preparation method is:

[0035] First prepare the acrylic acid solution: the acrylic acid solution is made of 12.5g of acrylic acid, 1.0g of 3-mercaptopropionic acid and 70.5g of deionized water;

[0036] Then, in the glass reaction device equipped with thermometer, stirrer, peristaltic pump dropping equipment, nitrogen inlet pipe and reflux cooling device, add deionized water 400.0g, methyl alkenyl polyoxyethylene ether (TPEG) 300.0g, Malay Acid anhydride 34.58g, stir and heat up to 80°C, stir for 20 minutes until completely dissolved, add 21.08g of sodium meth...

Embodiment 2

[0037] Embodiment 2: the preparation of polycarboxylate high-performance water reducing agent:

[0038] The present embodiment selects following raw material:

[0039] Methyl vinyl polyoxyethylene ether (TPEG) 200.0g

[0040] Methoxy polyethylene glycol methacrylate (MAMPEG) 100g

[0041] Fumaric acid 34.58g

[0042] Acrylic acid 12.5g

[0043] Sodium methacrylate 3.5g

[0044] 3-mercaptopropionic acid 1.2g

[0045] L-Ascorbic Acid 0.96g

[0046] Potassium peroxodisulfate and hydrogen peroxide 8.8g

[0047] The specific preparation method is:

[0048] First prepare the initiator solution: made from 1.2 g of 3-mercaptopropionic acid, 0.96 g of L-ascorbic acid and 100 g of deionized water.

[0049] Acrylic acid solution: made of methoxypolyethylene glycol methacrylate (MAMPEG) 100g, acrylic acid 12.5g and deionized water 71.5g.

[0050] In the glass reaction device equipped with a thermometer, a stirrer, a peristaltic pump dropping device, a nitrogen gas introduction pi...

Embodiment 3

[0051] Embodiment 3: the preparation of polycarboxylate high-performance water reducing agent:

[0052]The present embodiment selects following raw material:

[0053] Methyl vinyl polyoxyethylene ether (TPEG) 300.0g

[0054] Citraconic acid 34.58g

[0055] Acrylic acid 12.5g

[0056] Sodium allyl sulfonate 19.21g

[0057] Hydroxyethyl Acrylate 9.5g

[0058] Thioglycolic acid 1.2g

[0059] Ammonium persulfate 9.25g

[0060] The specific preparation method is:

[0061] First prepare an acrylic acid solution: the acrylic acid solution is made of 12.5 g of acrylic acid, 9.5 g of hydroxyethyl acrylate, 1.2 g of thioglycolic acid and 70.5 g of deionized water.

[0062] In a glass reaction device equipped with a thermometer, a stirrer, a peristaltic pump dropping device, a nitrogen inlet pipe and a reflux cooling device, add 400.0 g of deionized water, 300.0 g of methyl alkenyl polyoxyethylene ether (TPEG), citraconic acid 34.58g, stirred and heated to 80°C, stirred for 20 mi...

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Abstract

The invention relates to a high-performance water reducer of polycarboxylic acid, and a preparation method thereof, belonging to the technical field of concrete admixtures in construction industry. The water reducer is prepared by 55-90% of polyoxyethylene ether or ester containing unsaturated double bonds, 8-30% of unsaturated carboxylic acid and derivative thereof, 0-25% of unsaturated sulfonic acid and salt thereof, 0-15% of unsaturated carboxylic esters, and 0.5-5% of redox initiator. The high-performance water reducer of polycarboxylic acid prepared by the invention has the advantages of high water-reducing rate and collapse protectiveness, and has good adaptability for base materials. The water reducer provided by the invention is featured with simple technology, easy material getting, no pollution and low cost, and is industrially produced easily.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures in the construction industry, in particular to a polycarboxylate high-performance water reducer used in cement slurry, mortar and concrete and a preparation method thereof. Background technique [0002] With the continuous improvement of high-strength high-performance concrete technology and construction, the existing high-efficiency water reducers include naphthalene-based high-efficiency water-reducers, melamine-based high-efficiency water-reducers, sulfamate water-reducers and aliphatic water-reducers etc., due to its low water reducing rate, poor slump retention, easy to cause obvious retarding effect, high alkali content and other factors, it is difficult to meet the technology and requirements of modern concrete. For this reason, the hot spot of research at home and abroad is mainly to develop new varieties and new synthesis methods, and among many water reducers, polycarboxylate...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B24/28C08F290/06C08F283/06C04B103/30
Inventor 郝守义武英袁立志刘万利袁博
Owner 山西科腾环保新材料股份有限公司
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