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A kind of phosphine-containing polycarboxylate water reducer and its preparation method

A technology of phosphine polycarboxylic acid and water reducing agent, which is applied in the field of phosphine-containing polycarboxylic acid water reducing agent and its preparation, can solve the problem that the requirements of concrete construction and sustainable development cannot be met, the production process consumes a lot of energy, pollutes the environment, and collapses. The problem of large drop change, etc., achieves the effect of easy amplification and control of production, maintaining water solubility and steric hindrance, and low equipment requirements

Active Publication Date: 2016-04-13
SICHUAN SEDAR CHEM
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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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  • A kind of phosphine-containing polycarboxylate water reducer and its preparation method
  • A kind of phosphine-containing polycarboxylate water reducer and its preparation method
  • A kind of phosphine-containing polycarboxylate water reducer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the following ingredients and weight ratio:

[0032] Isoprene polyoxyethylene ether (molecular weight 1600) 100g;

[0033] Component R (N, N Dimethylene Phosphonic Acid Aminobutyl Maleate) 16g;

[0034] Component R 1 (acrylic acid) 14.5g;

[0035] Component R 2 (Ascorbic acid) 0.35g;

[0036] Chain transfer agent (mercaptopropionic acid) 0.4g;

[0037] Initiator (27.5% hydrogen peroxide) 2.5g;

[0038] 145g of water;

[0039] Preparation:

[0040] S1, weigh raw materials according to the above formula;

[0041] 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;

[0042] S3, prepare dropwise component A, the R 1 Add 17g of water, stir evenly, and prepare a solution;

[0043] S4, prepare and add component B dropwise, and the R 2 Mix with the chain transfer agent and the remaining 60g of w...

Embodiment 2

[0046] According to the following ingredients and weight ratio:

[0047] Isoprene polyoxyethylene ether (molecular weight 3200) 100g;

[0048] Component R (N,N dimethylene phosphonic acid aminobutyl maleate) 9.5g;

[0049] Component R 1 (1:1 mixture of methacrylic acid and acrylic acid) 10g;

[0050] Component R 2 (sodium bisulfite) 0.55g;

[0051] Chain transfer agent (mixture of mercaptoacetic acid and mercaptopropionic acid) 0.3g;

[0052] Initiator (potassium persulfate) 2g;

[0053] 120g of water;

[0054] Preparation:

[0055] S1, weigh raw materials according to the above formula;

[0056] 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;

[0057] S3, prepare dropwise component A, the R 1 Add 15g of water, stir evenly, and prepare a solution;

[0058] S4, prepare and add component B dropwise, and the ...

Embodiment 3

[0061] According to the following ingredients and weight ratio:

[0062] Isoprene polyoxyethylene ether (molecular weight 2400) 100g;

[0063] Component R (N,N dimethylene phosphonic acid aminobutyl maleate) 21g;

[0064] Component R 1 (Acrylic acid) 9.5g;

[0065] Component R 2 (hanging white block) 0.8g;

[0066] Chain transfer agent (dodecyl mercaptan) 0.6g;

[0067] Initiator (ammonium persulfate) 1.5g;

[0068] 160g of water;

[0069] Preparation:

[0070] S1, weigh raw materials according to the above formula;

[0071] 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;

[0072] S3, prepare dropwise component A, the R 1 Add 25g of water, stir evenly, and prepare a solution;

[0073] S4, prepare and add component B dropwise, and the R 2 Mix with the chain transfer agent and the remaining 60g of water, ...

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Abstract

The invention discloses a polycarboxylate superplasticizer containing phosphine and a preparation method thereof. The polycarboxylate superplasticizer is prepared from the following components by weight through redox free radical polymerization: 100 parts of isoprene polyoxyethylene ether, 8 to 30 parts of a component R, 7.5 to 14.5 parts of a component R1, 0.25 to 1 part of a component R2, 0.17 to 1 part of a chain transferring agent, 0.6 to 3.5 parts of an initiator and 106 to 180 parts of water. According to the invention, a phosphonate structure is introduced into the polycarboxylate superplasticizer, so slump retaining capability of the polycarboxylate superplasticizer is effectively improved, and a reliable and stable solution is provided to overcome the problem of long-acting slump loss resistance. The method adopts redox free radical polymerization technology and has the advantages of a low polymerization temperature, simple preparation technology, low requirements on equipment, easy realization of enlarged and controlled production, low cost, safety and environmental protection.

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 Patents(China)
IPC IPC(8): C08F290/06C08F220/06C08F230/02C08F2/38C04B24/24C04B103/30
Inventor 杨俊余建华张秋萍
Owner SICHUAN SEDAR CHEM
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