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Slump retaining type high-performance solid polycarboxylic acid water reducing agent as well as preparation method and application thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of slump-preserving high-performance solid polycarboxylate water reducing agent and its preparation, and can solve the problems of increasing the preparation cost and the like

Active Publication Date: 2018-05-04
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This further increases the cost of preparation

Method used

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  • Slump retaining type high-performance solid polycarboxylic acid water reducing agent as well as preparation method and application thereof
  • Slump retaining type high-performance solid polycarboxylic acid water reducing agent as well as preparation method and application thereof
  • Slump retaining type high-performance solid polycarboxylic acid water reducing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0073] With reference to the method described in Example 3 and Example 4 in patent document CN201510041919.X, with 2-methallyl alcohol or 3-methyl-3-butene-1-alcohol as initiator, the mass ratio of propylene oxide (PO): ethylene oxide (EO) = 21.5:100, and a liquid unsaturated polyether macromonomer with a molecular weight of 2400 was prepared.

Embodiment 1

[0075] In a 500ml three-necked flask equipped with a stirrer, a thermometer, and a condenser, drop into 258g preparation example 1 with 3-methyl-3-butene-1-alcohol as the liquid unsaturated polyether prepared by the initiator Monomer, 1.8g mercaptoacetic acid, 1.8g L-ascorbic acid, after stirring evenly, start to drop the mixed solution of 27g acrylic acid, 15g hydroxypropyl acrylate, 3.3g tert-butyl peroxybenzoate, the dropping time is 2h, drop After completion, ripen for 1 hour, cool down to room temperature and grind into solid particles. The product is characterized by infrared spectroscopy, and in the infrared spectrum, 3440.75cm-1 is the stretching vibration of O-H; 2871.42cm -1 and 2873.50cm -1 The strong absorption peak is -CH 2 The stretching vibration of - and -CH 3 Bending vibration; 1731.25cm -1 and 1705.85cm -1 It is the stretching vibration of C=O, 1105.68cm -1 and 1259.78cm -1 The very strong absorption peak at is -C-O-C-stretching vibration; the infrared...

Embodiment 2

[0077] In a 500ml three-necked flask equipped with a stirrer, a thermometer, and a condenser, drop into 285g preparation example 1 with 3-methyl-3-butene-1-ol as the liquid unsaturated polyether prepared by the initiator Monomer, 0.3g mercaptoacetic acid, 1.5g L-ascorbic acid, after stirring evenly, start to add dropwise a mixture of 9g acrylic acid, 6g hydroxypropyl acrylate, and 1.5g tert-butyl peroxybenzoate for 2 hours. After completion, ripen for 1 hour, cool down to room temperature and grind into solid particles. The product is characterized by infrared spectroscopy, 3440.25cm-1 in the infrared spectrum is the stretching vibration of O-H; 2871.20cm -1 and 2873.34cm -1 The strong absorption peak is -CH 2 The stretching vibration of - and -CH 3 Bending vibration; 1731.15cm -1 and 1705.60cm -1 It is the stretching vibration of C=O, 1105.45cm -1 and 1259.68cm -1 The very strong absorption peak at is -C-O-C-stretching vibration; the infrared results show that the soli...

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Abstract

The invention relates to the technical field of concrete additives and specifically relates to a slump retaining type high-performance solid polycarboxylic acid water reducing agent as well as a preparation method and application thereof. By adopting a bulk polymerization way, no solvent or medium is applied in the whole process; the reaction is carried out in a room-temperature condition, therebyovercoming the shortcoming that high-temperature melting and high-temperature polymerization are performed in traditional synthesis process of solid polycarboxylic acid; the synthesis technology is simple and efficient, easy to control, safe, environment-friendly and pollution-free; the production cost and energy consumption are low; the product is convenient for transportation, and the performance of the product is better than that of the slump retaining type solid polycarboxylic acid water reducing agent available on the market, and thus the product has a remarkable prospect in market application.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a slump-preserving high-performance solid polycarboxylate water reducer and its preparation method and application. Background technique [0002] As the fifth component of modern concrete, polycarboxylate superplasticizer has been widely used in the field of concrete engineering technology due to its excellent advantages such as low dosage, high slump retention, and large degree of freedom in molecular design. Most of the polycarboxylate superplasticizers widely used at present are solution products with a concentration of 10-50%, which causes great cost problems for long-distance transportation. In dry powder mortar, the liquid water reducer product needs to be spray-dried before use, but the spray-drying process consumes a lot of energy, and the overall performance of the product after spray-drying decreases, which cannot reach the level of liquid polycarboxylate in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/20C04B24/26C04B103/30
CPCC04B24/2647C04B2103/302C08F283/065C08F220/06C08F220/20
Inventor 张文龙朱军成郭晓锋李华威李方
Owner 联泓(江苏)新材料研究院有限公司
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