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Polycarboxylate water reducing agent and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of polycarboxylate water reducing agent and its preparation, can solve the problems of temperature sensitivity, poor cement adaptability, and inability to better meet the requirements of concrete water reduction and slump retention.

Inactive Publication Date: 2015-11-11
贵州省瓮安新源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the water-reducing rate of the existing polycarboxylate-based water-reducing agent is usually 35%-40%, which cannot meet the requirements of concrete water-reducing and slump retention, is sensitive to temperature, and has poor cement adaptability

Method used

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  • Polycarboxylate water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Formula: 36g of methallyl polyoxyethylene ether, 2.5g of sodium methacrylate, 2.5g of maleic anhydride, 2.5g of acrylamide, 5g of acrylic acid, 12.5g of hydrogen peroxide, 12g of thioglycolic acid and purified water.

[0020] Process:

[0021] 1. Prepare methallyl polyoxyethylene ether with purified water to make a solution with a concentration of 23%, and obtain product A;

[0022] 2. Add product A into the reaction kettle and heat until the temperature in the reaction kettle rises to 60°C to obtain product B;

[0023] 3. Take the dropping tank Ⅰ, add sodium methacrylate, maleic anhydride, acrylic acid and acrylamide to the dropping tank Ⅰ in sequence, and then add purified water to the dropping tank Ⅰ to make the solution concentration 27%. Get product C;

[0024] 4. Take the dropping tank II, add hydrogen peroxide to the dropping tank II, and then add purified water to the dropping tank II, so that the solution concentration is 27%, to obtain product D;

[0025] 5...

Embodiment 2

[0027] Formula: 40g of methallyl polyoxyethylene ether, 3g of sodium methacrylate, 3g of maleic anhydride, 3g of acrylamide, 8g of acrylic acid, 13g of hydrogen peroxide, 13g of thioglycolic acid and purified water.

[0028] Process:

[0029] 1. Prepare methallyl polyoxyethylene ether with purified water to make a solution with a concentration of 25% to obtain product A;

[0030] 2. Add product A into the reaction kettle and heat until the temperature in the reaction kettle rises to 60°C to obtain product B;

[0031] 3. Take the dropping tank I, add sodium methacrylate, maleic anhydride, acrylic acid and acrylamide to the dropping tank I in turn, and then add purified water to the dropping tank I to make the solution concentration 30%. Get product C;

[0032] 4. Take the dropping tank II, add hydrogen peroxide to the dropping tank II, and then add purified water to the dropping tank II, so that the solution concentration is 30%, to obtain product D;

[0033]5. Control the t...

Embodiment 3

[0035] Formula: 30g of methallyl polyoxyethylene ether, 2g of sodium methacrylate, 2g of maleic anhydride, 2g of acrylamide, 3g of acrylic acid, 12g of hydrogen peroxide, 10g of thioglycolic acid and purified water.

[0036] Process:

[0037] 1. Prepare methallyl polyoxyethylene ether with purified water to make a solution with a concentration of 20% to obtain product A;

[0038] 2. Add product A into the reaction kettle and heat until the temperature in the reaction kettle rises to 60°C to obtain product B;

[0039] 3. Take the dropping tank Ⅰ, add sodium methacrylate, maleic anhydride, acrylic acid and acrylamide to the dropping tank Ⅰ in sequence, and then add purified water to the dropping tank Ⅰ to make the solution concentration 25%. Get product C;

[0040] 4. Take the dropping tank II, add hydrogen peroxide to the dropping tank II, and then add purified water to the dropping tank II, so that the solution concentration is 25%, to obtain product D;

[0041] 5. Control ...

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Abstract

The invention discloses a polycarboxylate water reducing agent and a preparation method thereof. The water reducing agent is prepared from the following main components in parts by weight: methyl allyl polyethenoxy ether, sodium methallyl sulfonate, maleic anhydride, acrylamide, propenoic acid, hydrogen peroxide, mercaptoacetic acid and purified water. The polycarboxylate water reducing agent has the advantages that the water reducing rate reaches up to 45%, the high water reducing and slump loss resisting requirements of concrete can be better met, the sensitivity to temperature is low, the adaptability to cement is strong, the preparation process is simple, and the preparation is easy.

Description

technical field [0001] The invention relates to a water reducer and a preparation method thereof, in particular to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer (liquid) is the third generation of high-performance water reducer developed after the common water reducer represented by wood calcium and the high-efficiency water reducer represented by naphthalene. It is a high-efficiency water reducer that is at the forefront, has the highest technological content, has the best application prospects, and has the best comprehensive performance. PC polycarboxylate high-performance water reducer represents the most advanced water reducer product in the world today. The performance comparison with similar products at home and abroad shows that the PC polycarboxylate high-performance water reducer has reached the current international advanced level in terms of technical performance indi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F228/02C08F220/56C08F222/06C08F220/06C04B24/16C04B103/30
Inventor 陈保华
Owner 贵州省瓮安新源新材料有限公司
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