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Ferrocene modified polyoxyethylene ether monomer, ferrocene modified anti-mud polycarboxylic acid water reducer and preparation method of ferrocene modified anti-mud polycarboxylic acid water reducer

A technology based on polyoxyethylene ether and polycarboxylate, which is applied in the field of polycarboxylate water reducer for cement concrete, can solve the problems of instability of diphenylphosphoryl chloride, limited steric hindrance effect, and insufficient inhibition ability. Achieve the effect of improving anti-adsorption capacity, excellent performance and stable performance

Active Publication Date: 2021-06-01
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diphenylphosphoryl chloride used in this synthetic method is unstable, easily hydrolyzed, and the reaction conditions are harsh
In addition, the steric hindrance effect provided by short side chains is limited, and the ability to inhibit the intercalation adsorption of polycarboxylate superplasticizers with long side chains is insufficient

Method used

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  • Ferrocene modified polyoxyethylene ether monomer, ferrocene modified anti-mud polycarboxylic acid water reducer and preparation method of ferrocene modified anti-mud polycarboxylic acid water reducer
  • Ferrocene modified polyoxyethylene ether monomer, ferrocene modified anti-mud polycarboxylic acid water reducer and preparation method of ferrocene modified anti-mud polycarboxylic acid water reducer
  • Ferrocene modified polyoxyethylene ether monomer, ferrocene modified anti-mud polycarboxylic acid water reducer and preparation method of ferrocene modified anti-mud polycarboxylic acid water reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of ferrocene-modified polyoxyethylene ether monomer: 1mol allyl alcohol and 0.02mol sodium are added to the autoclave, and 20mol ethylene oxide and 3mol ferrocenyl glycidyl ether are added at 110 ℃ for ring-opening polymerization for 5 hours to obtain an unsaturated macromonomer containing a ferrocene group;

[0033] (2) Preparation of ferrocene-modified anti-mud type polycarboxylate water reducer: 1 mol of unsaturated macromonomer containing ferrocene group prepared in step (1), 3 mol of acrylic acid, in 0.02 mol of persulfuric acid Under the joint action of sodium, 0.01mol ascorbic acid and 0.02mol mercaptopropionic acid, carry out free radical polymerization reaction at 10°C for 3 hours, and add sodium hydroxide to adjust the pH to 6 to obtain ferrocene-modified anti-sludge type polycarboxylate Liquid:

[0034]

Embodiment 2

[0036] (1) Preparation of ferrocene-modified polyoxyethylene ether monomer: 1mol isopentenol and 0.04mol potassium are added to the autoclave, and 50mol ethylene oxide and 5mol ferrocenyl glycidyl ether are added at 125 ℃ for ring-opening polymerization for 6 hours to obtain an unsaturated macromonomer containing a ferrocene group;

[0037] (2) Preparation of ferrocene-modified anti-mud type polycarboxylate water reducer: the unsaturated macromonomer containing ferrocene group prepared in 1mol step (1), 4mol maleic anhydride, in 0.1mol Under the joint action of potassium persulfate, 0.04mol sodium ascorbate and 0.06mol sodium methacrylate, carry out free radical polymerization reaction at 40°C for 4 hours, and then add sodium hydroxide to adjust the pH to 7 to obtain ferrocene modified anti-sludge Type polycarboxylate water reducer:

[0038]

Embodiment 3

[0040] (1) Preparation of ferrocene-modified polyoxyethylene ether monomer: 1mol isopentenol and 0.05mol sodium are added to the autoclave, and 10mol ethylene oxide and 1mol ferrocenyl glycidyl ether are added at 100 The ring-opening polymerization reaction was carried out at ℃ for 4 hours to obtain an unsaturated macromonomer containing a ferrocene group;

[0041] (2) Preparation of ferrocene-modified anti-mud type polycarboxylate water reducer: the unsaturated macromonomer containing ferrocene group prepared by 1mol step (1), 2mol methacrylic acid, in 0.06mol Under the joint action of sodium persulfate, 0.02 mol of white block and 0.03 mol of mercaptoethanol, carry out free radical polymerization reaction at 25°C for 3 hours, and add potassium hydroxide to adjust the pH to 6.5 to obtain ferrocene-modified mud-resistant polycarboxylate Acid water reducer:

[0042]

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Abstract

The invention discloses a ferrocene modified polyoxyethylene ether monomer, a ferrocene modified anti-mud polycarboxylic acid water reducer and a preparation method. The specific preparation method comprises the following steps: (1) carrying out ring-opening polymerization reaction on a ferrocene-containing epoxy monomer and ethylene oxide under the combined action of enol and a catalyst to prepare the ferrocene modified polyoxyethylene ether monomer; and (2) carrying out free radical random copolymerization reaction on the ferrocene modified polyoxyethylene ether monomer and unsaturated acid or a derivative monomer thereof under the combined action of an initiator, a reducing agent and a chain transfer agent to prepare the ferrocene modified polycarboxylic acid water reducer. The polycarboxylic acid water reducing agent prepared by the method is a mud-resistant polycarboxylic acid water reducing agent, surface adsorption and intercalation adsorption of clay to the polycarboxylic acid water reducing agent are inhibited by utilizing the steric hindrance effect of a ferrocene group on a long side chain of a polymer, and the adsorption resistance of the water reducing agent to the clay is improved.

Description

technical field [0001] The invention relates to the technical field of a polycarboxylate water reducer for cement concrete, in particular to a mud-resistant polycarboxylate water reducer prepared by ferrocene-modified polyoxyethylene ether monomer and its Preparation. Background technique [0002] With the rapid development of domestic infrastructure, the demand for sand and gravel is increasing rapidly. However, due to the gradual control of sand and gravel mining by the state and the protection of the ecological environment, high-quality sand and gravel aggregate resources are becoming more and more scarce, and the price is also constantly increasing. As a result, more and more projects are forced to use poor quality sand and gravel. Compared with naphthalene-based, melamine, sulfamate and other water-reducing agents, ordinary polycarboxylate-based water-reducers are more sensitive to the clay content of aggregates due to their comb-shaped structure, and have poorer mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08F283/06C08F220/06C04B24/40C04B103/30
CPCC08G65/2609C08F283/065C04B24/40C04B2103/302C08F220/06Y02W30/91
Inventor 彭荩影钱珊珊屈浩杰王学川赵旭于鹏程卢通郑春扬
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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