Polyether macromonomer synthesis method, polyether macromonomer and application

A technology of polyether macromonomer and synthesis method, which is applied in the field of polyether macromonomer and its application and synthesis of polyether macromonomer, can solve the problems of low potassium and sodium ion content, wide molecular weight distribution, low double bond retention rate, etc. , to achieve the effect of low potassium and sodium ion content, narrow molecular weight distribution, and avoid product performance decline

Pending Publication Date: 2022-08-09
武汉中彭化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of relatively low molecular weight of polyether macromonomer products in the prior art, high content of by-products, low content of potassium and sodium ions, low double bond retention rate and wide molecular weight distribution, the purpose of the present invention is to provide a A kind of synthetic method of polyether macromonomer, polyether macromonomer and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for synthesizing a polyether macromonomer, comprising:

[0054] 1. Take 20 parts of methallyl alcohol and prenyl alcohol in the reactor, add 3% magnesium composite oxide in two batches within 30min, control the temperature of the reaction to be 26°C, and the time to be 150min. Product I was replaced with nitrogen to below 200ppm of oxygen content, heated to 98°C, fed with 202 parts of ethylene oxide, the temperature of the control reaction was 98~99°C, the reaction time was 130min, after the reaction finished, the temperature was cooled to 40~50°C , 20 parts of the reaction intermediate were obtained with a molecular weight of 530.

[0055] 2. Take 4 parts of the reaction intermediate with a molecular weight of 530 obtained in step 1 in the reactor, add 0.08 part of potassium hydrogen methoxide, control the reaction temperature to be 70-80°C, and the time to be 0.5-1h. After the product II is dehydrated for 20-30min, nitrogen is replaced to below 200ppm oxygen...

Embodiment 2

[0059] A method for synthesizing a polyether macromonomer, comprising:

[0060] 1. Take 20 parts of methallyl alcohol and prenyl alcohol in the reactor, add 3% aluminum composite oxide in 2 batches within 30min, control the temperature of the reaction to be 65°C, and the time to be 120min. Product I was replaced with nitrogen to below 200ppm of oxygen content, heated to 98°C, fed with 202 parts of ethylene oxide, the temperature of the control reaction was 104-105°C, the reaction time was 140min, and after the reaction was completed, the temperature was lowered to 40~50°C , 20 parts of the reaction intermediate were obtained with a molecular weight of 530.

[0061] 2. Take 4 parts of the reaction intermediate with a molecular weight of 530 obtained in step 1 in the reactor, add 0.08 part of sodium methoxide, control the temperature of the reaction to be 70-80°C, and the time to be 0.5-1h. ⅡAfter dehydration for 20-30min, carry out nitrogen replacement to the oxygen content be...

Embodiment 3

[0065] A method for synthesizing a polyether macromonomer, comprising:

[0066] 1. Take 20 parts of methallyl alcohol and prenyl alcohol in the reactor, add 3% iron composite oxide in two batches within 30min, control the temperature of the reaction to be 20~65°C, and the time to be 120~150min. The reacted product I nitrogen was replaced to below 200ppm of oxygen content, and the temperature was raised to 98°C, and 62.02 parts of ethylene oxide were introduced. At 40-50°C, 5.97 parts of a reaction intermediate with a molecular weight of 530 were obtained.

[0067] 2. Take 4 parts of the reaction intermediate with a molecular weight of 530 obtained in step 1 in the reactor, add 0.08 part of potassium hydrogen methoxide, control the reaction temperature to be 70-80°C, and the time to be 0.5-1h. After the product II is dehydrated for 20-30min, nitrogen is replaced to below 200ppm oxygen content, the temperature is raised to 98°C, 621.6 parts of ethylene oxide are introduced, the...

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Abstract

The invention discloses a polyether macromonomer synthesis method, a polyether macromonomer and application, and belongs to the technical field of chemical raw material processing. The synthesis method of the polyether macromonomer has the advantages of low byproduct content, narrow molecular weight distribution, high double bond retention rate, large relative molecular weight and low potassium and sodium ion content. The molecular weight distribution coefficient of the polyether macromonomer obtained by the synthesis method is less than 1.03, and the double bond retention rate is greater than 98.6%. The polyether macromonomer has large relative molecular weight, can enable the polycarboxylic acid water reducing agent to form large steric hindrance, increases the water reducing rate and slump retaining property, and greatly improves the performance of the water reducing agent; potassium and sodium ions reach below 10ppm; the compressive strength ratio of the synthesized polycarboxylate superplasticizer is better.

Description

technical field [0001] The invention belongs to the technical field of chemical raw material processing, and particularly relates to a method for synthesizing a polyether macromonomer, a polyether macromonomer and an application thereof. Background technique [0002] With the continuous and rapid development of economic construction, the total demand for concrete in major projects such as high-speed railways, highways, airports, municipal engineering, nuclear power, water conservancy and hydropower is increasing, and the performance requirements for concrete are also getting higher and higher. This also provides a huge market space for concrete water-reducing agents that can effectively improve concrete construction performance and concrete later performance, but also puts forward higher and higher requirements. [0003] At present, the ethoxylation reaction is mainly carried out in a tank reactor, and strong bases such as sodium hydroxide and potassium hydroxide are used as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C04B24/24C04B103/30
CPCC08G65/2609C08G65/266C08G65/2648C08G65/2651C08G65/2654C04B24/24C04B2103/302Y02P20/584
Inventor 彭韬容红向红军
Owner 武汉中彭化学科技有限公司
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