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Macromer for preparing polycarboxylic acid water-reducer and preparation method thereof

A technology of macromonomer and water reducing agent, which is applied to the macromonomer for preparing polycarboxylate water reducing agent and the field of preparation thereof, can solve the problem of high cost of macromonomer, poor mud resistance of water reducing agent, and production process of starting agent. Complex problems, etc., to achieve the effect of high double bond activity, strong mud resistance and low cost

Inactive Publication Date: 2017-01-04
SHANXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of the starter agent of the existing products is relatively complicated, which makes the cost of the macromonomer relatively high, and the synthetic water reducer generally has the problem of poor mud resistance

Method used

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  • Macromer for preparing polycarboxylic acid water-reducer and preparation method thereof
  • Macromer for preparing polycarboxylic acid water-reducer and preparation method thereof
  • Macromer for preparing polycarboxylic acid water-reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of EPEG-2300 Macromonomer

[0026] Add 20g of ethylene glycol monovinyl ether and 0.2g of sodium methoxide into a beaker, and stir evenly. Into the closed 1L autoclave, inject the mixed solution of ethylene glycol monovinyl ether and sodium methoxide. Close the reactor, heat up to 100°C, and start to feed ethylene oxide gas. Control the temperature of the reactor to not be higher than 110°C, continue the reaction for 6 hours, and feed about 520 g of ethylene oxide gas in total, then stop feeding the ethylene oxide gas and lower the temperature of the reactor. The product is released after cooling down, and it becomes a white waxy solid after cooling, which is an EPEG macromonomer with an average molecular weight of 2300.

Embodiment 2

[0028] Preparation of EPEG-3500 Macromonomer

[0029] Add 15g of ethylene glycol monovinyl ether and 0.3g of sodium methoxide into a beaker, and stir evenly. Into the closed 1L autoclave, inject the mixed solution of ethylene glycol monovinyl ether and sodium methoxide. Close the reactor, heat up to 100°C, and start to feed ethylene oxide gas. Control the temperature of the reactor to not be higher than 110°C, continue the reaction for 8 hours, and feed about 600 g of ethylene oxide gas in total, then stop feeding the ethylene oxide gas and lower the temperature of the reactor. The product is released after cooling down, and it becomes a white waxy solid after cooling, which is an EPEG macromonomer with an average molecular weight of 3500.

Embodiment 3

[0031] Preparation of EPEG-4500 Macromonomer

[0032] Add 20g of ethylene glycol monovinyl ether and 0.4g of sodium methoxide into a beaker, and stir evenly. Into the closed 1L autoclave, inject the mixed solution of ethylene glycol monovinyl ether and sodium methoxide. Close the reactor, heat up to 100°C, and start to feed ethylene oxide gas. Control the temperature of the reactor to not be higher than 110°C, continue the reaction for 4 hours, and feed about 700g of ethylene oxide gas in total, and then stop feeding the ethylene oxide gas. Due to the limited capacity of the reactor, about 300 g of the reaction solution was released. Close the reactor again, continue to feed ethylene oxide gas, continue to react for 4h, and feed about 200g of ethylene oxide gas in total, then stop feeding ethylene oxide gas and lower the temperature of the reactor. The product is released after cooling down, and it becomes a white waxy solid after cooling, which is an EPEG macromonomer with...

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PUM

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Abstract

The invention provides a macromer for preparing polycarboxylic acid water-reducer and a preparation method thereof. The macromer is synthesized by the reaction of 2-(vinyloxy)ethanol and epoxyethane as main materials. The macromer has simple molecular structure, the production process is safe and steady, and the cost is low; the reactivity is high and the conditions is easily controlled when the macromer is used for preparing polycarboxylic acid water-reducer, the obtained polycarboxylic acid water-reducer has high performance and performance and price ratio.

Description

technical field [0001] The invention relates to a polymer compound obtained by reactions other than carbon-carbon unsaturated bonds, in particular to a macromonomer for preparing polycarboxylate water reducers and a preparation method thereof. Background technique [0002] Water reducing agent is an essential component in modern concrete besides cement, sand, stone, water and admixtures. Water reducer is an admixture that reduces the water consumption of concrete under the condition of ensuring the same workability of concrete mixture. The use of water reducer can reduce the amount of cement and improve the workability and durability of concrete. It is the core of ready-mixed concrete . It is generally believed that the development of water reducers is divided into three stages: the first generation of ordinary water reducers represented by wood calcium, the second generation of high-efficiency water reducers represented by naphthalene-based water reducers, and the current ...

Claims

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Application Information

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IPC IPC(8): C08G65/28C04B24/26C04B103/30
CPCC08G65/2609C04B24/2605C04B2103/302C08G65/2648
Inventor 王自卫刘冠杰裴继凯任建国
Owner SHANXI UNIV
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