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Phosphated monomer of polycarboxylate water reducer and preparation method, polycarboxylate water reducer and preparation method

A technology of superplasticizer and polycarboxylic acid, applied in the fields of polycarboxylate superplasticizer phosphoesterified monomer and preparation, polycarboxylate superplasticizer and preparation, which can solve the problem of reducing concrete slump and fluidity. Small, concrete bleeding, poor adaptability and other problems, to achieve the effect of excellent adaptability, improved workability of concrete, and reduced dosage sensitivity

Active Publication Date: 2020-11-13
吉林众鑫化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In related technologies, polycarboxylate superplasticizers have a problem of sensitivity, poor workability, and poor adaptability. If more concrete is added, bleeding will occur, and if less concrete is added, the slump and fluidity will be small.

Method used

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  • Phosphated monomer of polycarboxylate water reducer and preparation method, polycarboxylate water reducer and preparation method
  • Phosphated monomer of polycarboxylate water reducer and preparation method, polycarboxylate water reducer and preparation method
  • Phosphated monomer of polycarboxylate water reducer and preparation method, polycarboxylate water reducer and preparation method

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[0074] The preparation method of the phosphoric esterification monomer of the polycarboxylate water reducer of the present invention has simple process and is suitable for large-scale production.

[0075] The phosphorylated monomer of the polycarboxylate superplasticizer of the present invention may contain the following components:

[0076]

[0077] as P 2 o 5 The substances that may be produced by reacting with isopentenol polyoxyethylene ether (TPEG) are:

[0078] Monoesters and Diesters:

[0079]

[0080] Part P 2 o 5 Moisture absorption becomes metaphosphoric acid, and metaphosphoric acid reacts with TPEG to form phosphate monoester:

[0081]

[0082] Metaphosphoric acid reacts with water to generate pyrophosphoric acid, pyrophosphoric acid and TPEG generate pyrophosphate diester, and pyrophosphate diester is hydrolyzed to generate phosphoric acid monoester and phosphoric acid:

[0083]

[0084]

[0085] In addition to the above reaction products, som...

Embodiment 1

[0121] A kind of preparation method of polycarboxylate superplasticizer phosphating monomer, comprising:

[0122] raw material:

[0123] a. Isopentenol polyoxyethylene ether-2400 (the number indicates the weight average molecular weight, the same below);

[0124] B, phosphorus pentoxide (analytical pure);

[0125] c, sulfamic acid;

[0126] d, sodium hydroxide (using mass fraction is 40% sodium hydroxide aqueous solution).

[0127] Wherein the mol ratio of raw material a and b is 2:1;

[0128] Raw material c is 1.0% of the total mass of a and b;

[0129] Raw material d is 0.04% of the total mass of a and b.

[0130] The four-neck flask is equipped with a thermometer, a stirring and reflux device, and is protected by nitrogen. Put the TPEG-2400 monomer into a four-necked bottle, heat it to 50°C in a water bath to melt, and stir for 5 minutes. Add phosphorus pentoxide in batches at 30°C, each time not exceeding 10% of the total amount of phosphorus pentoxide, with an inte...

Embodiment 2

[0132] A kind of preparation method of polycarboxylate superplasticizer phosphating monomer, comprising:

[0133] raw material:

[0134] a. Isopentenol polyoxyethylene ether-2000;

[0135] B, phosphorus pentoxide (analytical pure);

[0136] c. 98% concentrated sulfuric acid;

[0137] d, sodium hydroxide (using mass fraction is 40% sodium hydroxide aqueous solution).

[0138] Wherein the mol ratio of raw material a and b is 2:1;

[0139] Raw material c is 0.5% of the total mass of a and b;

[0140] Raw material d is 1.0% of the total mass of a and b.

[0141] The four-neck flask is equipped with a thermometer, a stirring and reflux device, and is protected by nitrogen. Put the TPEG-2000 monomer into a four-necked bottle, heat it to 50°C in a water bath to melt, and stir for 5 minutes. Add phosphorus pentoxide in batches at 40°C, each time not exceeding 10% of the total amount of phosphorus pentoxide, with an interval of 10 minutes each time. Control the temperature not ...

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Abstract

The invention provides a polycarboxylic acid water reducing agent phosphoric acid esterification monomer and a preparation method thereof and a polycarboxylic acid water reducing agent and a preparation method thereof. The polycarboxylic acid water reducing agent phosphoric acid esterification monomer is simple in raw material components mainly comprising polyoxyethylene ether, a phosphorylating agent and a neutralizing agent, the preparation method is simple in process, and the polycarboxylic acid water reducing agent can be further prepared. When applied to concrete construction engineeringmaterials, the polycarboxylic acid water reducing agent phosphoric acid esterification monomer can improve the workability of concrete. The polycarboxylic acid water reducing agent phosphoric acid esterification monomer has excellent adaptability to cement, fly ash and concrete with different soil contents, temperatures and water consumptions, and can reduce the dosage sensitivity of the water reducing agent.

Description

technical field [0001] The invention relates to the technical field of construction engineering materials, in particular, to a polycarboxylate water reducer phosphating monomer and a preparation method thereof, and a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] Polycarboxylate Superplasticizer (Polycarboxylate Superplasticizer) is a high-performance water reducer and a cement dispersant in the application of cement concrete. Widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/327C08F283/06C08F220/06C08F2/38C04B24/26C04B103/30
CPCC04B24/246C04B2103/302C08F2/38C08F283/065C08G65/327C08F220/06
Inventor 贾洪文孙东日汪颖柳旭峰张玉龙钟文强马殿宇
Owner 吉林众鑫化工集团有限公司
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