Method for preparing glue reduction agent by amphiprotic polyester polycarboxylic acid compound

Abstract

The invention provides a method for preparing a glue reduction agent by an amphiprotic polyester polycarboxylic acid compound. The glue reduction agent is prepared from, by weight, 35-45 parts of amphiprotic polyester polycarboxylic acid compounds, 4-10 parts of alcohol and amine compounds, 0.5-4 parts of polyhydric alcohol, 0.1-0.5 part of organic silane lubricating agents, 0.02-0.08 part of emulsification dispersing agents, 0.01-0.1 part of isothiocyanate compounds and the rest water, and the total weight is 100 parts. The components are placed into a reaction kettle and sufficiently stirredfor 0.5 hour to obtain the glue reduction agent prepared from the amphiprotic polyester polycarboxylic acid compound. Methoxy polyethylene glycol monomethyl ether with the molecular weight of 600 isesterified, and positive ion micro-monomers serve as raw materials, reasonable dosage of a chain transfer agent is implemented, so that a molecular configuration with a short main chain and a side chain is acquired, a certain good steric hindrance effect is achieved, the high-density side chain adsorbs water by capillary effects, hydration reaction is delayed, a compact water film is formed on thesurface, and dispersibility and workability of concrete are improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a glue reducer from an amphoteric polyester polycarboxylic acid compound. Background technique [0002] With the continuous progress of civil engineering construction in our country, various new concrete admixtures have been continuously developed and applied, among which the concrete adhesive reducer, also known as concrete synergist, is quite representative. The adhesive reducer can significantly reduce the amount of cementitious materials and increase the workability of concrete while ensuring the later strength. The action mechanism of the glue reducer is to efficiently stimulate and disperse the cement micro-aggregate that is difficult to be dispersed by the water reducer, so that the cement hydration is more sufficient and the utilization rate of the cement is improved to the greatest extent. [0003] Ordinary glue reducers use cationic mo...

AI Technical Summary

Problems solved by technology

The main functional components of ordinary adhesive reducer components are cationic monomers such as alcohol amines, the molecular weight of which is generally small, basically does not have steric hindrance, and it is difficult to further improve the adhesive reducing and dispersing ability

However, at present, the functional components of the adhesive reducer are relatively single, and are greatly affected by the differences and changes of raw materials and other admixtures, and the problem of matching and adaptability is prominent.

At this stage, the research on the preparation of ester polycarboxylate reducers is still rarely reported. Therefore, the preparation of polycarboxylate reducers by esterified polyether combined with cationic small monomers has good research and application significance.

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