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Mother liquor of aromatic ring polycarboxylate water reducer and its preparation method and application

A technology of polycarboxylic acid and water reducing agent, applied in the field of concrete admixtures, can solve the problems of moldy concrete loss and excessive speed, and achieve the effect of enhancing the slump retention ability

Active Publication Date: 2021-06-15
GUIZHOU KEZHIJIE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the two problems of mildew and rapid loss of concrete in the existing polycarboxylate water reducer mentioned in the background technology, the present invention provides a mother liquor of aromatic ring polycarboxylate water reducer, which is composed of aromatic ring polycarboxylate water reducer It is prepared by four-way copolymerization reaction of base conjugated unsaturated carboxylic acid, unsaturated functional monomer, unsaturated fatty carboxylic acid and isopentenyl polyoxyethylene ether macromonomer;

Method used

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  • Mother liquor of aromatic ring polycarboxylate water reducer and its preparation method and application
  • Mother liquor of aromatic ring polycarboxylate water reducer and its preparation method and application
  • Mother liquor of aromatic ring polycarboxylate water reducer and its preparation method and application

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Embodiment 1

[0045] In parts by weight, 16 parts of a-1-1 and 30 parts of water are prepared into A material liquid; 8 parts of a-2-3, 8 parts of a-3-2 and 15 parts of water are prepared into B material liquid; 1 part of L-ascorbic acid and 30 parts of water are prepared into C material liquid; 0.5 part of sodium methacrylate and 20 parts of water are prepared into D material liquid; 200 parts of isopentenyl polyoxyethylene ether, 2 parts of a-3 -2. Add 0.9 parts of hydrogen peroxide and 139 parts of water into the reaction vessel, adjust the temperature to 60°C, and stir to dissolve it; at the same time, add A material liquid, B material liquid, C material liquid and D material liquid dropwise to react; react for 1h After that, cool down to 35°C and continue to react for 2 hours; after all the feed liquids are added dropwise, keep warm for 1.5 h to obtain the 50% concentration aromatic ring polycarboxylate superplasticizer mother liquid; among them, the drop-adding time of A feed liquid is...

Embodiment 2

[0047] In parts by weight, 10 parts of a-1-2 and 25 parts of water are prepared into A material liquid; 5 parts of a-2-1, 5 parts of a-3-3 and 10 parts of water are prepared into B material liquid; 0.3 parts of sodium bisulfite and 25 parts of water are prepared into material liquid C; 0.7 parts of sodium hypophosphite and 25 parts of water are prepared into material liquid D. Add 200 parts of isopentenyl polyoxyethylene ether, 3 parts of a-3-3, 1.1 parts of ammonium persulfate, and 140 parts of water into the reaction vessel, adjust the temperature to 55°C, and stir to dissolve it; at the same time, add material A dropwise Liquid, B material liquid, C material liquid and D material liquid were reacted; after 1.5 hours of reaction, the temperature was lowered to 40°C, and the reaction was continued for 2 hours; Polycarboxylate superplasticizer mother liquor; wherein, the dropping time of material A is 1h, the dropping time of B is 3h, and the dropping time of C and D is 3h10mi...

Embodiment 3

[0049] In parts by weight, 8 parts of a-1-3 and 20 parts of water are prepared into A material liquid; 6 parts of a-2-2, 6 parts of a-3-4 and 13 parts of water are prepared into B material liquid; 0.2 parts of sodium formaldehyde sulfoxylate and 20 parts of water are prepared into C material solution; 1 part of sodium formate and 30 parts of water are prepared into D material solution. Add 200 parts of isopentenyl polyoxyethylene ether, 2 parts of a-3-4, 0.7 parts of sodium persulfate, and 142 parts of water into the reaction vessel, adjust the temperature to 65°C, and stir to dissolve it; at the same time, add material A dropwise Liquid, B material liquid, C material liquid and D material liquid were reacted; after 1 hour of reaction, the temperature was lowered to 45°C, and the reaction was continued for 1.5 hours; Polycarboxylate superplasticizer mother liquor; wherein, the dropping time of material A is 0.75h, the dropping time of B is 3h, and the dropping time of C and D ...

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Abstract

The invention provides a mother liquor of aromatic ring polycarboxylate water reducer and its preparation method and application. The mother liquor of aromatic ring polycarboxylate water reducer is composed of aryl conjugated unsaturated carboxylic acid and unsaturated functional monomer , unsaturated aliphatic carboxylic acid and isopentenyl polyoxyethylene ether macromonomer tetra-polymerization reaction to prepare; wherein, the aryl conjugated unsaturated carboxylic acid is an antibacterial compound; the unsaturated functional monomer Contains at least one ester bond or amide bond. The mother liquor of aromatic ring polycarboxylate water-reducer of the present invention has obvious anti-mildew and anti-bacterial effects, and can be used in water-reducers later without adding preservatives to preserve quality for a long time. It also has obvious slow-release effects and can effectively solve the problem of The technical problem of rapid loss of slump of concrete with high sandstone powder or mud content; in addition, its preparation method is simple, economical and applicable.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a mother liquor of an aromatic ring polycarboxylate water reducer, a preparation method and application thereof. Background technique [0002] With the acceleration of the modernization process, whether it is urban and rural road construction, bridge construction, or the construction of urban high-rise buildings and the implementation of municipal engineering, the application of polycarboxylate superplasticizers is everywhere. Polycarboxylate superplasticizer has become a research hotspot in colleges and universities because of its low dosage, high water reducing rate, good slump performance, controllable structure, and environmental protection. It is also favored by many concrete companies because of its excellent performance. The fifth component other than sand, stone, cementitious material liquid and water is indispensable for modern concrete building materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/04C08F212/14C08F230/02C08F220/58C08F220/06C08F220/38C08F222/02C04B24/26C04B24/16C04B103/30
Inventor 邓磊陈文红蒋禹沈建荣
Owner GUIZHOU KEZHIJIE NEW MATERIAL
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