Preparation method of stearamide concrete foaming agent compounded component and application thereof

Abstract

The invention discloses a preparation method of a stearamide concrete foaming agent compounded component. The preparation method is characterized by comprising the following steps of: pouring eleaostearic acid and an amine monomer into a reactor with the mol ratio of eleaostearic acid to the amine monomer being 1.0-3.5:1.0-3.0, adding toluene, reacting for 2-9 hours at the temperature of 100-170 DEG C, cooling, washing the obtained crude product by the use of anhydrous ethanol or acetone, and drying to obtain an intermediate; taking each raw material with the mol ratio of the intermediate to chloroacetic acid to sodium hydroxide being 1: (1.0-2.4): (2.0-4.8), and preparing chloroacetic acid and sodium hydroxide into a sodium chloroacetate aqueous solution at the concentration of 15-30%; mixing water and the intermediate with the mol ratio of the intermediate to water being 1: 30-90, stirring, heating up to the temperature of 80-95 DEG C, dropwisely adding a sodium chloroacetate solution, keeping warm and reacting for 2-4 hours, cooling, and filtering. The filtrate is the stearamide concrete foaming agent compounded component with good performance.

Description

technical field [0001] The invention belongs to the modification research category of foaming agent for low bulk density foam concrete, relates to a preparation method and application of stearamide-type concrete foaming agent composite components, and is mainly suitable for compounding and modifying concrete foaming agent. Background technique [0002] In the prior art, commonly used concrete foaming agents mainly include: rosin resins, synthetics, proteins, composites, etc., the main components of which are one or more surfactants. Rosin resin concrete foaming agent can only be used to prepare concrete with a density greater than 600kg / m because of its unsatisfactory foam stability and expansion ratio. 3 The above medium and high density foam concrete cannot be used to prepare 500kg / m 3 The following low-density foamed concrete; although synthetic concrete foaming agent foams quickly and has a high foaming ratio, its foam stability is poor, and it is not suitable for the p...

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Problems solved by technology

Rosin resin concrete foaming agent can only be used to prepare concrete with a density greater than 600kg / m because of its unsatisfactory foam stability and expansion ratio. 3 The above medium and high density foam concrete cannot be used to prepare 500kg / m 3 The following low-density foamed concrete; although synthetic concrete foaming agent foams quickly and has a high foaming ratio, its foam stability is poor, and it is not suitable for the preparation of low-density foamed concrete; although animal protein concrete foaming agent foams It can be used in the preparation of low-density foamed concrete because of its high foaming ratio and good foam stability. However, the raw materials required for its preparation, such as animal hair and animal hoof horns, are limited in source, and the animal protein foaming agent has a strong odor during production and use. In the application, there are also disadvantages such as retardation, sensitivity to ambient temperature and humidity, and high use cost, which limit its application; although plant protein concrete foaming agents are environmentally friendly and low in use cost, they have poor foam stability and are also Not suitable for producing low density foam concrete

At present, commercially available concrete foaming agents still have short foam stability time, especially when they are added to the mixture, the bubbles will burst quickly, which will lead to application defects such as early collapse of the mixture. Therefore, it is necessary to develop high-quality concrete foaming agents Agents or their composite components have greater practical significance

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