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Viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer and normal-temperature preparation method thereof

A technology of ester ether copolymerization of polycarboxylic acid and water reducing agent, applied in the field of water reducing agent, can solve the problems of many side reactions, influence of application performance and high impurity content, achieve good industrial value, improve later application performance, and reduce reaction temperature Effect

Pending Publication Date: 2022-02-01
HUNAN JINHUADA BUILDING MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polycarboxylate superplasticizers are generally prepared by reacting at relatively high temperatures (110-120°C), and there are many side reactions at high temperatures, resulting in high impurity content, which has a negative effect on the later application performance. affected by

Method used

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  • Viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer and normal-temperature preparation method thereof
  • Viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer and normal-temperature preparation method thereof
  • Viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer and normal-temperature preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] S1. To prepare a pre-emulsified monomer mixture, 3 parts of vinyl polyoxyethylene ether, 2 parts of isopentenyl polyoxyethylene ether, 0.5 parts of ethyl methacrylate, 1.2 parts of n-butyl methacrylate, methacrylic acid 0.1 part of isobornyl ester, 0.02 part of isooctyl methacrylate, 0.2 part of octylphenol polyoxyethylene ether OP-4, 0.3 part of octylphenol polyoxyethylene ether OP-10, dodecyl diphenyl ether disulfonate 0.2 parts of sodium bicarbonate and 10 parts of water are stirred at high speed at room temperature until the above reagents are emulsified into a uniform emulsion, and set aside;

[0040] S2. Prepare the reaction base material by stirring and uniformly dissolving 23 parts of isopentenyl polyoxyethylene ether, 1 part of glucose, 0.02 part of soluble cornstarch and 18 parts of water at room temperature to obtain the reaction base material, which is set aside;

[0041] S3. Uniformly mix 0.1 part of vitamin C and 8 parts of water to obtain dropwise materia...

Embodiment 2

[0046] S1. To prepare a pre-emulsified monomer mixture, 5 parts of vinyl polyoxyethylene ether, 1.5 parts of isopentenyl polyoxyethylene ether, 0.4 part of ethyl methacrylate, 1.0 part of n-butyl methacrylate, methacrylic acid 0.08 parts of isobornyl ester, 0.01 parts of isooctyl methacrylate, 0.15 parts of octylphenol polyoxyethylene ether OP-4, 0.2 parts of octylphenol polyoxyethylene ether OP-10, 0.15 parts of sodium dodecyl diphenyl ether disulfonate Stir with 8 parts of water at high speed at room temperature until the above reagents are emulsified into a uniform emulsion, and set aside;

[0047] S2. Prepare the reaction base material. Stir and dissolve 25 parts of isopentenyl polyoxyethylene ether, 0.9 part of glucose, 0.04 part of soluble cornstarch and 18 parts of water at room temperature to obtain the reaction base material, which is set aside;

[0048] S3. Uniformly mix 0.09 parts of vitamin C and 8 parts of water to obtain drop-in material A, and simultaneously add...

Embodiment 3

[0053] S1. To prepare a pre-emulsified monomer mixture, 4 parts of vinyl polyoxyethylene ether, 1.0 part of isopentenyl polyoxyethylene ether, 0.3 part of ethyl methacrylate, 0.8 part of n-butyl methacrylate, methacrylic acid 0.03 part of isobornyl ester, 0.01 part of isooctyl methacrylate, 0.06 part of octylphenol polyoxyethylene ether OP-4, 0.1 part of octylphenol polyoxyethylene ether OP-10, dodecyl diphenyl ether disulfonate 0.15 parts of sodium bicarbonate and 6 parts of water are stirred at a high speed under normal temperature conditions until the above reagents are emulsified into a uniform emulsion and set aside;

[0054] S2. Prepare the reaction base material by stirring and uniformly dissolving 25 parts of isopentenyl polyoxyethylene ether, 0.8 part of glucose, 0.03 part of soluble cornstarch and 8 parts of water at room temperature to obtain the reaction base material, which is set aside;

[0055] S3. Uniformly mix 0.08 parts of vitamin C and 8 parts of water to ob...

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Abstract

The invention specifically discloses a viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer. The water reducer comprises vinyl polyoxyethylene ether, isopentenyl polyoxyethylene ether, ethyl methacrylate, n-butyl methacrylate, isobornyl methacrylate, isooctyl methacrylate, octylphenol polyoxyethylene ether OP-4, octylphenol polyoxyethylene ether OP-10, sodium dodecyl diphenyl ether disulfonate, glucose, soluble corn starch, vitamin C, acrylic acid, mercaptoethanol, hydrogen peroxide, ammonium persulfate and water. The invention also provides a normal-temperature preparation method of the viscosity reduction type ester ether copolymerized polycarboxylic acid water reducer. According to the invention, the polycarboxylic acid water reducer is prepared at normal temperature, so that the later application performance of the polycarboxylic acid water reducer can be obviously improved while the higher conversion rate of the water reducer monomer is ensured, the manufacturing cost is greatly saved, the profit rate of the product is increased, and the industrial value is very good.

Description

technical field [0001] The invention relates to the technical field of water reducers, in particular to a viscosity-reducing ester ether copolymerized polycarboxylate water reducer and a normal temperature preparation method thereof. Background technique [0002] With the development of concrete technology, high-performance water reducer has become one of the indispensable components in the process of concrete use. Since the 1980s, polycarboxylate-based water-reducing agents have gained popularity due to their advantages such as low dosage, high water-reducing rate, good slump retention, various beneficial properties for concrete materials, strong molecular design, and environmental protection. It has become the hotspot and direction of the development of water reducing agent technology in recent years. [0003] Polyether polycarboxylate water reducer has high water reducing rate and slump retention ability, and it is more and more widely used in my country's high-speed rai...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/18C08F220/06C08F2/30C08F2/26C04B24/26C04B103/30
CPCC08F283/065C08F2/30C08F2/26C04B24/2694C04B2103/302C08F220/1802C08F220/1804C08F220/1811C08F220/1808C08F220/06
Inventor 黄仙才潘俊辉刘诗哲于子望
Owner HUNAN JINHUADA BUILDING MATERIAL
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