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Polycarboxylic acid water reducer and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of polycarboxylic acid water reducing agent and its preparation, to achieve the effects of low slump, high water reducing property and simple reaction conditions

Active Publication Date: 2019-03-12
山西谷山建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the slump after 1H of the existing polycarboxylate superplasticizer meets the basic process requirements, there is still room for improvement. How to prepare a carboxylic acid superplasticizer with a simple preparation method or a low slump is researched question

Method used

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  • Polycarboxylic acid water reducer and preparation method thereof
  • Polycarboxylic acid water reducer and preparation method thereof

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Embodiment 1

[0017] A polycarboxylate water reducer, comprising the following raw materials: polyoxyethylene allyl ester macromonomer 100kg, sodium methacrylate sulfonate 1kg, acrylic acid 50kg, potassium hydroxide 5kg, tap water 70kg, chlorinated Diphenylphosphine 2kg, copper chloride 0.5kg.

[0018] A method for preparing a polycarboxylate water reducer, comprising the following steps: Step 1: Add water to a reaction tank, heat it to 50 degrees Celsius, start stirring at a stirring speed of 3000r / min, and evenly add polyoxyethylene allyl ester Macromonomer, stir for 1 hour, adjust the speed to 1000r / min; Step 2: stop heating, add acrylic acid, copper chloride and chlorinated diphenylphosphine to the reaction kettle at the same time, continue to stir for 1 hour, adjust the speed to 1000r / min Step 3: Add sodium methpropylene sulfonate to the reaction tank, and keep the stirring speed at 500; Step 4: Add potassium hydroxide to the reaction tank, and adjust the pH to 7.

Embodiment 2

[0020] A polycarboxylate water reducer, comprising the following raw materials: 120kg of polyoxyethylene allyl ester macromonomer, 5kg of sodium methacrylate sulfonate, 80kg of acrylic acid, 10kg of potassium hydroxide, 90kg of tap water, chlorinated diphenyl Phosphine 5kg, copper chloride 1kg.

[0021] A method for preparing a polycarboxylate water reducer, comprising the following steps: Step 1: Add water to a reaction tank, heat it to 80 degrees Celsius, start stirring at a stirring speed of 4000r / min, and evenly add polyoxyethylene allyl ester Macromonomer, stir for 3 hours, adjust the rotation speed to 2000r / min; Step 2: stop heating, add acrylic acid, copper chloride and chlorinated diphenylphosphine to the reaction kettle at the same time, continue to stir for 1.5 hours, adjust the rotation speed to 1000r / min Step 3: Add sodium methpropylene sulfonate to the reaction tank and keep the stirring speed at 1000r / min; Step 4: Add potassium hydroxide to the reaction tank to a...

Embodiment 3

[0023] A polycarboxylate water reducer, comprising the following raw materials: polyoxyethylene allyl ester macromonomer 105kg, sodium methacrylate sulfonate 2kg, acrylic acid 60kg, potassium hydroxide 6kg, tap water 75kg, chlorinated diphenyl Phosphine 3kg, copper chloride 0.6kg.

[0024] A method for preparing a polycarboxylate water reducer, comprising the following steps: Step 1: Add water to a reaction tank, heat it to 50 degrees Celsius, start stirring at a stirring speed of 3000r / min, and evenly add polyoxyethylene allyl ester Macromonomer, stir for 1 hour, adjust the speed to 1000r / min; Step 2: stop heating, add acrylic acid, copper chloride and chlorinated diphenylphosphine to the reaction kettle at the same time, continue to stir for 1 hour, adjust the speed to 1000r / min Step 3: Add sodium methpropylene sulfonate to the reaction tank, and keep the stirring speed at 500; Step 4: Add potassium hydroxide to the reaction tank, and adjust the pH to 7.

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PUM

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Abstract

The invention discloses a polycarboxylic acid water reducer and a preparation method thereof. The polycarboxylic acid water reducer comprises the following raw materials in percentages by mass: 100-120 parts of polyoxyethylene-based allyl ester macromonomers, 1-5 parts of sodium methallyl sulfonate, 50-80 parts of acrylic acid, 5-10 parts of potassium hydroxide, 70-90 parts of tap water, 2-5 partsof chlorodiphenylphosphine and 0.5-1 part of copper chloride. Reaction conditions are simple, reaction steps are also simple, and the tap water can be directly used for carrying out charging reaction. The disclosed polycarboxylic acid water reducer has high water reducing ability and low slump, and can meet the requirement of processing of concrete well.

Description

technical field [0001] The invention relates to the field of concrete water reducers, in particular to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is a high-performance superplasticizer and a cement dispersant used in cement concrete. It is widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. In many concrete projects, traditional high-efficiency concrete such as naphthalene series is increasingly unable to meet engineering needs due to limitations in technical performance. A new generation of water reducer that has attracted much attention at home and abroad, polycarboxylate high-performance water reducer, because it has truly designed an effective molecular structure based on the mechanism of dispersed cement, has a super-dispersion type, and can prevent concrete slump loss. It does not cause obvious retardation, exerts a high plasticizing effect at a l...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F283/06C08F228/02C08F220/06C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F228/02C08F220/06
Inventor 刘景典
Owner 山西谷山建材有限公司
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