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

A technology of carboxylic acid compounds and adhesive reducers, which is applied in the field of amphoteric polyester polycarboxylic acid compounds to prepare adhesive reducers, can solve the problems of small molecular weight, single functional components of adhesive reducers, outstanding matching and adaptability, etc. Achieve the effects of improving dispersibility and workability, improving slump retention ability, and reducing competitive adsorption

Inactive Publication Date: 2019-03-08
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 aff

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1 (each component consumption is parts by weight)

[0061] 1. Preparation of esterified polyether macromonomer: the preparation method is carried out in the following steps:

[0062] 1), put into the container 30 parts of 600 molecular weight methoxypolyethylene glycol monomethyl ether, 20 parts of acrylic acid, sodium thiosulfate loaded on zirconia, and bake at high temperature to obtain 0.5 part of solid superacid, p-tert-butyl-o- 0.1 parts of hydroquinone, 30 parts of benzene, fully stirred, sealed and vacuumized;

[0063] 2), raise the temperature to 110°C and keep it warm for 4 hours;

[0064] 3) After the heat preservation is over, stop heating, and when the temperature drops to 30°C, add 1 part of sodium hydroxide, separate the catalyst carrier and the water-carrying agent, and obtain an esterified polyether macromonomer with a molecular weight of 1200.

[0065] 2. Preparation of adhesive reducer: Amphoteric polyester polycarboxylate adhesive reducer...

Embodiment 2

[0070] Embodiment 2 (each component consumption is parts by weight)

[0071] 1. Preparation of esterified polyether macromonomer: the preparation method is carried out in the following steps:

[0072] 1), drop into container 32 parts of 600 molecular weight methoxypolyethylene glycol monomethyl ethers, 22 parts of methacrylic acid, the sodium thiosulfate loaded on ferric oxide and make 0.6 part of solid superacid, 1 part through high-temperature baking , 0.3 parts of 1-diphenyl-2-picrylhydrazine, 29 parts of toluene, fully stirred, sealed and vacuumized;

[0073] 2), raise the temperature to 115°C and keep it warm for 5 hours;

[0074] 3) After the heat preservation is over, stop heating, and when the temperature drops to 30°C, add 2 parts of sodium carbonate, separate the catalyst carrier and the water-carrying agent, and obtain an esterified polyether macromonomer with a molecular weight of 1200.

[0075] 2. Preparation of adhesive reducer: amphoteric polyester polycarboxy...

Embodiment 3

[0080] Embodiment 3 (each component consumption is parts by weight)

[0081] 1. Preparation of esterified polyether macromonomer: the preparation method is carried out in the following steps:

[0082] 1), in container, drop into 34 parts of 600 molecular weight methoxypolyethylene glycol monomethyl ethers, 24 parts of maleic acid, the sodium thiosulfate loaded on ferric oxide obtains 0.7 part of solid super acid, 4 parts through high temperature baking -0.4 parts of hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl radical, 28 parts of xylene, fully stirred, sealed and evacuated;

[0083] 2), raise the temperature to 118°C and keep it warm for 6 hours;

[0084] 3) After the heat preservation is over, stop heating, and when the temperature drops to 30°C, add 3.5 parts of ethanolamine, separate the catalyst carrier and the water-carrying agent, and obtain an esterified polyether macromonomer with a molecular weight of 1200.

[0085] 2. Preparation of adhesive reducer: amphoteric po...

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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...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F290/06C08F228/02C08F230/02C08F220/34C08F220/06C08F222/02C08F212/14C08F230/08
CPCC04B24/165C04B2103/0068C08F290/062C08F228/02C08F230/02C08F220/34C08F220/06
Inventor 柯凯张雨婷严明陈艳林熊焰
Owner HUBEI UNIV OF TECH
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