Phosphine containing polycarboxylic acid water reducer and preparation method thereof

A technology of phosphine polycarboxylate and water reducer, which is applied in the field of phosphine polycarboxylate water reducer and its preparation, can solve the problems of inability to meet the requirements of concrete construction and sustainable development, high energy consumption of the production process, environmental pollution, collapse Large changes in slump and other problems, to achieve the effects of easy scale-up and control of production, maintaining water solubility and steric hindrance, and low equipment requirements

Inactive Publication Date: 2019-05-21
青岛凯玉盈商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the core main component of concrete admixture, the slump of traditional naphthalene-based and melamine-based high-efficiency water-reducing agents varies greatly, and the production process consumes a lot of energy and pollutes the environment, which cannot meet the requirements of concrete construction and sustainable development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the following ingredients and weight ratio:

[0030] Isoprene polyoxyethylene ether (molecular weight 1600) 100g;

[0031] Component R (N, N Dimethylene Phosphonic Acid Aminobutyl Maleate) 16g;

[0032] Component R1 (acrylic acid) 14.5g;

[0033] Component R2 (ascorbic acid) 0.35g;

[0034] Chain transfer agent (mercaptopropionic acid) 0.4g;

[0035] Initiator (27.5% hydrogen peroxide) 2.5g;

[0036] 145g of water;

[0037] Preparation:

[0038] S1, weigh raw materials according to the above formula;

[0039] S2. Put the weighed isoprene polyoxyethylene ether and component R into the reaction kettle, add 68g of water, start stirring, slowly raise the temperature to 35-45°C, and prepare a uniform concentrated solution;

[0040] S3, prepare dropwise component A, add the weighed R1 into 17g water, stir evenly, and prepare a solution;

[0041] S4, prepare and add component B dropwise, mix the weighed R2 and the chain transfer agent with the remaining 60...

Embodiment 2

[0044] According to the following ingredients and weight ratio:

[0045] Isoprene polyoxyethylene ether (molecular weight 3200) 100g;

[0046] Component R (N,N dimethylene phosphonic acid aminobutyl maleate) 9.5g;

[0047] Component R1 (1:1 mixture of methacrylic acid and acrylic acid) 10g;

[0048] Component R2 (sodium bisulfite) 0.55g;

[0049] Chain transfer agent (mixture of mercaptoacetic acid and mercaptopropionic acid) 0.3g;

[0050] Initiator (potassium persulfate) 2g;

[0051] 120g of water;

[0052] Preparation:

[0053] S1, weigh raw materials according to the above formula;

[0054] S2. Put the weighed isoprene polyoxyethylene ether and component R into the reaction kettle, add 55g of water, start stirring, slowly raise the temperature to 35-45°C, and prepare a uniform concentrated solution;

[0055] S3. Prepare and add component A dropwise, add 15 g of water to the weighed R1, stir evenly, and prepare a solution;

[0056] S4, prepare and add component B dr...

Embodiment 3

[0059] According to the following ingredients and weight ratio:

[0060] Isoprene polyoxyethylene ether (molecular weight 2400) 100g;

[0061] Component R (N,N dimethylene phosphonic acid aminobutyl maleate) 21g;

[0062] Component R1 (acrylic acid) 9.5g;

[0063] Component R2 (hanging white block) 0.8g;

[0064] Chain transfer agent (dodecyl mercaptan) 0.6g;

[0065] Initiator (ammonium persulfate) 1.5g;

[0066] 160g of water;

[0067] Preparation:

[0068] S1, weigh raw materials according to the above formula;

[0069] S2. Put the weighed isoprene polyoxyethylene ether and component R into the reaction kettle, add 75g of water, start stirring, slowly raise the temperature to 35-45°C, and prepare a uniform concentrated solution;

[0070] S3. Prepare and add component A dropwise, add 25 g of water to the weighed R1, stir evenly, and prepare a solution;

[0071] S4, prepare and add component B dropwise, mix the weighed R2 and the chain transfer agent with the remainin...

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PUM

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Abstract

The invention discloses a phosphine containing polycarboxylic acid water reducer and a preparation method thereof. The phosphine containing polycarboxylic acid water reducer is prepared from the following components in parts by weight through a redox free radical polymerization process: 100 parts of isoprene polyoxyethylene ether, 8-30 parts of a component R, 7.5-14.5 parts of a component R1, 0.25-1 part of a component R2, 0.17-1 part of a chain transfer agent, 0.6-3.5 parts of an initiator and 106-180 parts of water. By introducing a phosphonate structure into the polycarboxylic acid water reducer, the slump retaining ability of the polycarboxylic acid water reducer is improved effectively, so that a reliable and stable solution is provided for solving a long-acting slump-retaining problem. The whole process is the redox free radical polymerization process which is relatively low in polymerization temperature, and the preparation process is simple in equipment demand and easy to amplify control production. The polycarboxylic acid water reducer is low in cost and safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to the technical field of synthesis and preparation of concrete external water reducer, and in particular to a phosphine-containing polycarboxylate water reducer and a preparation method thereof. Background technique [0002] As the "fifth component" of concrete, concrete admixtures have attracted more and more attention. With the continuous improvement of construction technology requirements, the performance requirements of concrete admixtures have also increased. Because under the appropriate material and mix ratio design, the performance of concrete can only be improved by the characteristics of concrete admixtures. Today, with the continuous development of China's economy, the urbanization construction and the development and expansion of provincial capital cities are getting faster and faster, and the traffic is getting more and more congested. However, the location ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F230/02C08F4/40C04B24/24C04B103/30
Inventor 宋丛恺
Owner 青岛凯玉盈商贸有限公司
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