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High-adaptability water reducing agent based on biological amino acid as well as preparation method and application of high-adaptability water reducing agent

An amino acid and adaptable technology, applied in the field of building materials, can solve the problems such as the gap in water-reducing performance of monopolyether chain water-reducing agents, and achieve the effects of strong degradability, good adaptability, and strong adsorption

Pending Publication Date: 2022-01-25
BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN107868243A discloses a preparation method of amino acid derivatized phosphorous acid superplasticizer. In this patent, amino acid-terminated halogenated polyether is used for phosphonation to prepare a phosphonated monopolyether chain superplasticizer. The raw materials used are more environmentally friendly. However, there is still a gap in the water reducing performance of single polyether chain superplasticizers compared with comb polymer structure superplasticizers

Method used

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  • High-adaptability water reducing agent based on biological amino acid as well as preparation method and application of high-adaptability water reducing agent
  • High-adaptability water reducing agent based on biological amino acid as well as preparation method and application of high-adaptability water reducing agent
  • High-adaptability water reducing agent based on biological amino acid as well as preparation method and application of high-adaptability water reducing agent

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Experimental program
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Effect test

Embodiment 1

[0044] Get 130.5 parts of quality tyrosine, 117.4 parts of quality 732 type cation exchange resin (hydrogen type) and 328.1 parts of quality phenoxy macromonomer A-1, mix uniformly in 1600 parts of water, add 118.1 parts of quality sub Phosphoric acid, stir and mix, and then slowly add 194.1 parts of formaldehyde solution by mass, during which the temperature is controlled not to exceed 50 degrees. Afterwards, the temperature was raised to 100°C and condensed for 6 hours. Afterwards, the catalyst was filtered out and neutralized by adding liquid caustic soda with a total acid equivalent of 80% of the reactants to obtain water reducer P-1 with a weight-average molecular weight of 17.6kDa.

Embodiment 2

[0046] Get 108.7 parts of quality tyrosine, 66 parts of quality 732 type cation exchange resin (hydrogen type) and 226.2 parts of quality phenoxy macromonomer A-2, mix uniformly in 2300 parts of water, add 98.4 parts of quality sub- Phosphoric acid, stir and mix, and then slowly add 153.2 parts of formaldehyde solution by mass, during which the temperature is controlled not to exceed 50 degrees. Afterwards, the temperature was raised to 100°C and condensed for 2 hours. Afterwards, the catalyst was filtered out and neutralized by adding liquid caustic soda with a total acid equivalent of 60% of the reactants to obtain a water reducer P-2 with a weight-average molecular weight of 6.7 kDa.

Embodiment 3

[0048] Get 108.7 parts of quality tyrosine, 10.35 parts of p-hydroxybenzoic acid, 87 parts of quality 732 type cation exchange resin (hydrogen type) and 313.2 parts of quality phenoxy macromonomer A-3, mix in 1500 parts of water Evenly, add 98.4 parts by mass of phosphorous acid, stir and mix, then slowly add 150.2 parts by mass of formaldehyde solution, during which the temperature is controlled not to exceed 50 degrees. Afterwards, the temperature was raised to 80°C and condensed for 8 hours. Afterwards, the catalyst was filtered out and neutralized by adding liquid caustic soda with a total acid equivalent of 80% of the reactants to obtain water reducer P-3 with a weight average molecular weight of 13.8kDa.

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Abstract

The invention discloses a high-adaptability water reducing agent based on biological amino acid as well as a preparation method and application of the high-adaptability water reducing agent. A structural unit of the water reducing agent comprises phosphorylated residues of tyrosine and phenoxy polyoxyethylene ether residues; and the water reducing agent is formed by randomly arranging the structural units. The water reducing agent is prepared from tyrosine, phenoxy polyoxyalkylene ether and an auxiliary monomer through simultaneous phosphonation-condensation reaction. The water reducing agent is prepared from biological amino acid, the process is more environment-friendly, and the water reducing agent has multiple adsorption functional groups such as phosphonic acid groups, carboxyl groups and phenolic hydroxyl groups, and is excellent in water reducing performance and high in adaptability to a gelling system.

Description

technical field [0001] The invention relates to a highly adaptable water reducer based on biological amino acids and its preparation method and application, belonging to the technical field of building materials. [0002] technical background [0003] In recent years, with the rapid advancement of my country's infrastructure construction and the vigorous development of urbanization, the demand for various building materials has expanded rapidly. At the same time, the composition of cement and admixtures used in building materials and concrete has become increasingly complex. The application of admixtures such as clay is increasing, which puts forward higher requirements for the raw material adaptability of the superplasticizer and the tolerance to complex gelling systems. At present, mainstream water reducers, such as naphthalene-based water reducers, polycarboxylate water reducers, etc., have relatively single adsorption groups, limited universal applicability to different ty...

Claims

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Application Information

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IPC IPC(8): C08G16/02C04B24/30C04B103/30
CPCC08G16/0212C04B24/246C04B2103/302
Inventor 严涵王涛黄振马建峰周栋梁杨勇冉千平洪锦祥
Owner BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD
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