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A water-retaining plasticizer for wet-mixed mortar and preparation method thereof

A wet-mixed mortar and plasticizer technology, applied in the field of construction admixtures, can solve the problems of insufficient water retention rate and long-term stability of compressive strength of plasticizers, and achieve enhanced steric hindrance effect, good plastic retention effect, and dispersed sex high effect

Active Publication Date: 2021-10-29
KZJ NEW MATERIALS GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing wet-mix mortar additives use plasticizers, but existing plasticizers are insufficient in terms of water retention, compressive strength, and long-term stability

Method used

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  • A water-retaining plasticizer for wet-mixed mortar and preparation method thereof
  • A water-retaining plasticizer for wet-mixed mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) The first esterification reaction: add 50g of 2-amino-3-p-hydroxyphenylpropionic acid and 50g of butenol into the reaction vessel, heat up to 80°C, then add 1g of aluminum sulfate octahydrate, and react After 3 hours, excess butenol was removed by reflux to obtain butenyl 2-amino-3-p-hydroxyphenylpropionate.

[0030] (2) The second esterification reaction:

[0031] Add 100g of 3-hydroxyphenylphosphonopropionic acid and cyclohexane into the reaction kettle, then add 100g of dihydromyrcenol, add 732 cation exchange resin and hydroquinone at the same time, stir evenly, and then raise the temperature to 30°C, react for 2 hours, filter and distill at atmospheric pressure to get 3-hydroxyphenyl phosphatopropionate dihydromyrcenyl;

[0032] Wherein, the dosage of 732 cation exchange resin is 0.5% of the mass of 3-hydroxyphenylphosphorylpropionic acid, the dosage of hydroquinone is 0.5% of the mass of 3-hydroxyphenylphosphorylpropionic acid, and the atmospheric distillatio...

Embodiment 2

[0036] (1) The first esterification reaction: 50g of 2-amino-3-p-hydroxyphenylpropionic acid and 100g of propylene alcohol were added to the reaction vessel, the temperature was raised to 90°C, and then 1g of ferric ammonium sulfate dodecahydrate was added, After reacting for 3 hours, excess propenol was removed by reflux to obtain 2-amino-3-p-hydroxyphenylpropionate.

[0037] (2) The second esterification reaction:

[0038] Add 100g of 3-hydroxyphenylphosphonopropionic acid and cyclohexane into the reactor, then add 200g of dihydromyrcenol, add 732 cation exchange resin and hydroquinone at the same time, stir evenly, and then raise the temperature to 50°C, react for 3 hours, filter and distill at atmospheric pressure to get 3-hydroxyphenyl phosphatopropionate dihydromyrcenyl;

[0039] Wherein, the dosage of 732 cation exchange resin is 1% of the mass of 3-hydroxyphenylphosphorylpropionic acid, the dosage of hydroquinone is 0.5% of the mass of 3-hydroxyphenylphosphorylpropion...

Embodiment 3

[0043](1) The first esterification reaction: add 50g of 2-amino-3-p-hydroxyphenylpropionic acid and 150g of prenyl alcohol into the reaction vessel, raise the temperature to 90°C, and then add 1g of sodium bisulfate monohydrate , reacted for 4 hours, and refluxed to remove excess prenyl alcohol to obtain prenyl 2-amino-3-p-hydroxyphenylpropionate.

[0044] (2) The second esterification reaction:

[0045] Add 100g of 3-hydroxyphenylphosphonopropionic acid and cyclohexane into the reactor, then add 250g of dihydromyrcenol, add 732 cation exchange resin and hydroquinone at the same time, stir evenly, and then raise the temperature to 60°C, react for 3 hours, filter and distill under normal pressure to get 3-hydroxyphenyl phosphatopropionate dihydromyrcenyl;

[0046] Wherein, the dosage of 732 cation exchange resin is 1.5% of the mass of 3-hydroxyphenylphosphorylpropionic acid, the dosage of hydroquinone is 1% of the mass of 3-hydroxyphenylphosphorylpropionic acid, and the atmosp...

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Abstract

The invention relates to the technical field of building admixtures, in particular to a water-retaining wet-mix mortar plasticizer and a preparation method thereof. The preparation method comprises the following steps: polyether monomer, cumyl polyoxyethylene ether, 2-amino After ‑3‑p-hydroxyphenylpropionate and cocatalyst are mixed, add initiator solution, add acrylic acid and 3‑hydroxyphenyl phosphine propionic acid dihydromyrcenyl ester to form mixed solution A respectively after reaction, and initiate Solution B composed of agent and chain transfer agent, after the reaction, adjust the pH=7 to 8 to obtain the wet-mix mortar plasticizer. Compared with the prior art, the mortar synthesized by the wet-mixed mortar plasticizer provided by the present invention has the advantages of low consistency loss, better water retention, high compressive strength and long-term stability of the mortar, and has significant progress .

Description

technical field [0001] The invention relates to the technical field of building admixtures, in particular to a water-retaining plasticizer for wet-mixed mortar and a preparation method thereof. Background technique [0002] With the acceleration of the development of new urbanization in China, the number of urban municipal infrastructure and residential buildings will increase significantly, and building energy consumption has already accounted for a considerable part of the overall energy consumption. As a bulk building material second only to wall materials and concrete, building mortar is used in hundreds of millions of tons every year. Wet-mixed mortar will gradually replace the traditional on-site preparation mortar with its advantages of stable quality, energy saving and environmental protection, and centralized clean production; wet-mixed mortar is an inevitable result of industry development with its characteristics of energy saving, environmental protection, and sus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/30
CPCC04B24/32C04B2103/30
Inventor 柯余良郭元强方云辉林添兴钟丽娜朱少宏张小芳
Owner KZJ NEW MATERIALS GROUP CO LTD
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