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Organic fluorine modified glycol amine substituted polycarboxylate cement grinding aid and preparation method thereof

A fluorine-modified glycol amine and cement grinding aid technology, which is applied in the field of cement additives, can solve the problems of high volatility and low ball milling efficiency, and achieve uniform molecular weight distribution, good grinding aid effect, and controllable relative molecular weight Effect

Active Publication Date: 2021-04-02
江苏山河水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of small molecular organic alcohols and organic amines in the invention, there are disadvantages of high volatility and low ball milling efficiency during the ball milling process.

Method used

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  • Organic fluorine modified glycol amine substituted polycarboxylate cement grinding aid and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine, the steps include:

[0022] (1) Preparation of diolamine-substituted carboxylic acid monomer: Add 10 parts of aconitic acid and 25 parts of N,N-diethylformamide into the dissolving device, stir and dissolve evenly, and obtain the solution I for later use; Add 15 parts of diethanolamine to the device, start stirring, and dropwise add the solution I to it. After the dropwise addition, heat the system to 110°C, keep the temperature for 4 hours, and then distill off the solvent and water under reduced pressure to obtain diolamine-substituted Carboxylic acid monomer;

[0023] (2) Preparation of polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine: under the condition of nitrogen, 24 parts of carboxylic acid monomer substituted by glycol amine, 17 parts of polyethylene glycol monoacrylate, 8 One part of perfluorooctyl m...

Embodiment 2

[0026] The preparation method of the polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine, the steps include:

[0027] (1) Preparation of carboxylic acid monomer substituted by diolamine: add 6 parts of aconitic acid and 20 parts of DMSO into the dissolving device, stir and dissolve evenly, and obtain the dissolving solution I for later use; add 10 parts of diisopropyl Alcohol amine, start stirring, dropwise add solution I to it, after the dropwise addition, heat the system to 80°C, keep it warm for 4 hours, then distill off the solvent and water under reduced pressure to obtain the carboxylic acid monomer substituted by glycol amine;

[0028] (2) Preparation of polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine: under the condition of nitrogen, 40 parts of carboxylic acid monomer substituted by glycol amine, 10 parts of methallyl polyethylene glycol , 15 parts of perfluorotetradecyl monocoat furoate, ...

Embodiment 3

[0031] The preparation method of the polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine, the steps include:

[0032] (1) Preparation of diolamine-substituted carboxylic acid monomer: add 9 parts of aconitic acid and 22 parts of DMF into the dissolving device, stir and dissolve evenly, and obtain the dissolving solution I for later use; add 11 parts of di-n-propane to the reaction device Alcohol amine, start stirring, dropwise add dissolving solution I to it, heat the system to 94°C after the dropwise addition, keep it warm for 5 hours, then distill off the solvent and water under reduced pressure to obtain the carboxylic acid monomer substituted by glycol amine;

[0033] (2) Preparation of polycarboxylate cement grinding aid substituted by organic fluorine modified glycol amine: under the condition of nitrogen, 20 parts of carboxylic acid monomer substituted by glycol amine, 20 parts of allyl polyethylene glycol, 5 Part perfluorododecyl m...

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Abstract

The invention relates to an organic fluorine modified diolamine-substituted polycarboxylate cement grinding aid and a preparation method thereof. A diolamine-substituted carboxylic acid monomer is prepared by a substitution reaction, and a fluorine-containing olefinic acid monomer (including a perfluoroalkyl chain) and the diolamine-substituted carboxylic acid monomer undergo a free radical polymerization reaction to prepare the cement grinding aid. The molecule of the cement grinding aid contains the perfluoroalkyl branch chain having a reduced surface tension and a good dispersion effect anda polyethanolamine unit with a good grinding effect, so the cement grinding aid has the advantages of good grinding aiding effect and high grinding aiding efficiency. The method adopting an RAFT process to synthesize has the advantages of controllable relative molecular mass, uniform molecular weight distribution, simple synthesis process and easiness in industrialization.

Description

technical field [0001] The invention relates to cement grinding aids, in particular to polycarboxylate cement grinding aids substituted by organic fluorine modified glycol amines and a preparation method thereof, belonging to the technical field of cement additives. Background technique [0002] The grinding process in cement production is extremely energy-intensive, and the further fine and ultra-fine grinding of minerals is even more energy-intensive. Therefore, it is of great significance to reduce the energy consumption in the grinding process and improve the powder efficiency. Cement grinding aid is a kind of production aid that improves grinding efficiency and the grinding performance of materials in cement production, and the addition amount is very small. In the cement grinding process, grinding aids can significantly improve the grinding efficiency and greatly reduce the power consumption of grinding, especially in the process of fine grinding and ultra-fine grindi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C08F283/06C08F290/06C08F220/36C08F2/38C08F222/18C04B103/52
Inventor 万章文曹冰
Owner 江苏山河水泥有限公司