Mixed alcohol polyoxyethylene ether water reducing agent macromonomer, and preparation method and application thereof

An alcohol polyoxyethylene ether and water reducing agent technology, which is applied in the field of mixed alcohol polyoxyethylene ether water reducing agent macromonomers, can solve the problems of low water reducing rate and low flow retention, and achieve stable reaction temperature control, Avoiding safety risks, the effect of uniform molecular weight distribution
CN109880076AActive Publication Date: 2019-06-14三江化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
三江化工有限公司
Publication Date
2019-06-14

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Abstract

The invention discloses a mixed alcohol polyoxyethylene ether water reducing agent macromonomer, and a preparation method and application thereof. The preparation process of the mixed alcohol polyoxyethylene ether water reducing agent macromonomer comprises the following steps of in the nitrogen gas atmosphere, performing mixing and stirring reaction on potassium hydroxide, sodium series catalysts, methallyl alcohol, allylic alcohol and ethylene oxide; performing synthesis to obtain mixed alcohol polyoxyethylene ether intermediates; performing reaction on the mixed alcohol polyoxyethylene ether intermediates and ethylene oxide in the nitrogen gas atmosphere; performing synthesis to obtain a final product mixed alcohol polyoxyethylene ether which is a macromonomer used for preparing a polycarboxylic acid water reducing agent. The mixed alcohol polyoxyethylene ether synthesized and obtained by the method simultaneously have the basic molecular framework structure of allylic alcohol and methallyl alcohol; when the mixed alcohol polyoxyethylene ether product is used for preparing the polycarboxylic acid water reducing agent, and the polycarboxylic acid water reducing agent is applied to cement, the water reducing performance can be maintained; meanwhile, good dispersion maintaining performance can be realized.
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Description

technical field

[0001] The invention relates to a macromonomer of a mixed alcohol polyoxyethylene ether water reducer and its preparation method and application. Background technique

[0002] Polycarboxylate high-efficiency superplasticizer has the advantages of low dosage, high water reduction, strong slump retention ability, and wide adaptability to cement because of its special comb-shaped structure. Has been widely used. Polyether macromonomer is the main raw material for synthesizing polycarboxylate water reducer. At present, the widely used macromonomers in the market are HPEG synthesized from methallyl alcohol and TPEG synthesized from isopentenol.

[0003] However, as my country's urbanization process continues to accelerate, the construction of large-scale infrastructure continues to promote the development of concrete technology, coupled with many factors affecting the composition of concrete such as cement, fly ash, sand and gravel, the existing polycarboxylate ...

Claims

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