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Modified polyether macromonomer as well as preparation method and use method thereof

A polyether macromonomer and modification technology, which is applied in the field of modified polyether macromonomer and its preparation, can solve problems affecting the fluidity and durability of concrete, poor cohesion of machine-made sand concrete, synthesis and application troubles, etc. , to achieve good economic benefits, good air-entraining effect, improved workability and durability

Active Publication Date: 2022-01-21
连云港石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the concrete raw materials are almost exhausted, and there are more and more machine-made sand concretes. However, due to the poor shape and gradation of machine-made sand particles, the cohesion of machine-made sand concrete is poor, which affects the fluidity and durability of concrete.
At this stage, the macromonomers used for polycarboxylate superplasticizers mainly include methallyl polyoxyethylene ether, isopentenyl polyoxyethylene ether, ethylene glycol vinyl polyoxyethylene ether, diethylene glycol Vinyl polyoxyethylene ether, 4-hydroxybutyl vinyl polyoxyethylene ether, and polyether macromonomer products in the market are all prepared by ring-opening polymerization of ethylene oxide with corresponding initiators under the action of a basic catalyst. Therefore, the polyether macromonomer structure contains long polyethylene glycol side chains, which are hydrophilic and air-entraining, but the bubbles introduced are of different sizes, which has caused certain problems for synthesis and application.
[0003]Therefore, it is urgent to improve the performance of polyether macromonomers in this field, so as to solve the problem of large air content in concrete after using polycarboxylate water reducer, strength decline, and durability. gender issues

Method used

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  • Modified polyether macromonomer as well as preparation method and use method thereof
  • Modified polyether macromonomer as well as preparation method and use method thereof
  • Modified polyether macromonomer as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a modified polyether macromonomer, which comprises the following steps: adding 0.1 parts of Tributyl phosphate, 0.3 part of polydimethylsiloxane, 0.05 part of polyoxyethylene polyoxypropylene alcohol amine ether, 0.01 part of polyoxyethylene polyoxypropylene glyceryl ether, 0.1 part of sodium dodecylsulfonate, 0.2 part Triterpene saponins, 0.5 part of fumaric acid, 0.5 part of itaconic acid, and 1 part of citric acid were stirred for 30 minutes until they were evenly mixed, and the pH value of the obtained modified polyether macromonomer was 4.0.

[0022] The prepared modified polyether macromonomer is polymerized to obtain a polycarboxylate water reducer, which is applied to C30 concrete. Among them, the mix ratio of C30 concrete is shown in Table 1: the concrete test refers to GB 8076-2008 " Concrete Admixtures" and GB / T 50082-2009 "Standards for Test Methods of Long-term Performance and Durability of Ordinary Concrete".

[0023] Table 1

[0...

Embodiment 2～5

[0027] According to the method and steps of Example 1, the modified polyether macromonomer was prepared according to the formula and operating parameters in Table 1.

[0028] Table 2

[0029]

[0030] The modified polyether macromonomer obtained in the above-mentioned Examples 1-5 was prepared by a conventional synthesis process in the field to obtain a polycarboxylate water-reducer, which was applied to the above-mentioned C30 mix ratio concrete summary, and its performance was tested, as shown in Table 3 below .

[0031]

[0032] Among them, comparative example 1 is a polycarboxylate water reducer prepared by using commercially available data molecular weight of 2400 methallyl polyoxyethylene ether according to the conventional synthesis process in this field, and comparative example 2 is using commercially available data molecular weight of 2400. Isopentenyl polyoxyethylene ether is a polycarboxylate water reducer prepared according to the conventional synthesis proc...

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Abstract

The invention discloses a modified polyether macromonomer as well as a preparation method and a use method thereof, and belongs to the technical field of water reducers. The modified polyether macromonomer is prepared from the following components in parts by weight: 100 parts of polyether macromonomer, 0.1-0.3 part of tributyl phosphate, 0.1-0.3 part of polydimethylsiloxane, 0-0.2 part of polyoxyethylene polyoxypropylene pentaerythritol ether, 0.01-0.05 part of polyoxyethylene polyoxypropylene alcohol amine ether, 0.01-0.05 part of polyoxyethylene polyoxypropylene glycerol ether, 0.05-0.25 part of sodium dodecyl sulfate, 0.05-0.25 part of triterpenoid saponin, 0-1 part of fumaric acid, 0-1 part of itaconic acid and 1-2 parts of citric acid. The technical problems of high air content, reduced strength, poor durability and the like in concrete after the polycarboxylic acid water reducer is used are solved.

Description

technical field [0001] The invention belongs to the technical field of water reducers, and in particular relates to a modified polyether macromonomer and its preparation method and use method. Background technique [0002] With the rapid development of the construction industry, the role of polycarboxylate-based high-performance water reducers in engineering applications has become increasingly prominent. Compared with traditional high-efficiency water reducers such as naphthalene series, polycarboxylate high-performance water reducers have many unique technical performance advantages: low dosage, high water reducing rate, good slump retention effect, and small shrinkage of the prepared concrete , which is conducive to improving the volume stability and durability of concrete; and it is environmentally friendly and pollution-free during production and use, and is a green admixture. At the same time, concrete raw materials are almost exhausted, and there are more and more ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F222/02C08F220/06C04B24/26C04B103/30
CPCC08F283/065C04B24/2694C04B2103/302C08F222/02C08F220/06
Inventor 杨卫东罗琼朱卫刚钱奕飞朱晓东胡晓宇章鹏飞陈艳丹
Owner 连云港石化有限公司
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