Preparation method of organic silicon modified high-molecular cement grinding aid

A technology of cement grinding aids and polymers, which is applied in the field of preparation of organosilicon-modified polymer cement grinding aids, which can solve the problems of ineffective grinding aids, reduce water interfacial tension, promote lubrication, and accelerate cracks extended effect

Inactive Publication Date: 2018-07-03
胡果青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem that the existing grinding aids have no effect on impr

Method used

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  • Preparation method of organic silicon modified high-molecular cement grinding aid

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Example Embodiment

[0021] Example 1

[0022] Take 100g of sodium lignosulfonate, add 200mL of deionized water, stir at 300r / min for 20min, then add 120g of diethanolamine, disperse by 200W ultrasonic for 20min, and heat to 70℃, then add 270g mass fraction dropwise at 3g / min It is a 37% formaldehyde solution. After 2 hours of incubation and reaction, it is transferred to a rotary evaporator for distillation under reduced pressure for 3 hours, and then 500 mL of absolute ethanol is added. After standing for 20 minutes, the filter residue is filtered and the filter residue is placed in a drying box for 6 hours to obtain modified wood. Sodium sulfonate, take 150g allyl glycidyl ether, 120g end hydrogen-containing silicone oil, stir at 300r / min for 20min, then add 5g 0.1% chloroplatinic acid isopropanol solution dropwise at 0.1g / min, and Heat to 80℃, continue to stir and react for 4h to obtain the reaction solution, take 150g of modified sodium lignosulfonate and 80g glacial acetic acid into the reactio...

Example Embodiment

[0023] Example 2

[0024] Take 150g of sodium lignosulfonate, add 300mL of deionized water, stir at 350r / min for 25min, then add 180g of diethanolamine, disperse with 200W ultrasonic for 25min, and heat to 75℃, then add 400g mass fraction dropwise at 4g / min It is a 37% formaldehyde solution. After the reaction is kept for 3 hours, it is transferred to a rotary evaporator for distillation under reduced pressure for 4 hours, and then 650 mL of absolute ethanol is added. After standing for 25 minutes, the filter residue is filtered and the filter residue is placed in a drying box for 7 hours to obtain modified wood. Sodium sulfonate, take 165g allyl glycidyl ether, 135g end hydrogen-containing silicone oil, stir at 350r / min for 25min, and then add dropwise 7g 0.1% chloroplatinic acid isopropanol solution at 0.2g / min, and Heat to 85°C, continue to stir and react for 4h to obtain the reaction solution. Take 195g of modified sodium lignosulfonate and 90g glacial acetic acid into the re...

Example Embodiment

[0025] Example 3

[0026] Take 200g of sodium lignosulfonate, add 400mL of deionized water, stir at 400r / min for 30min, then add 240g of diethanolamine, disperse by 200W ultrasonic for 30min, and heat to 80℃, then add 540g mass fraction dropwise at 5g / min It is a 37% formaldehyde solution. After the reaction is kept for 3 hours, it is transferred to the rotary evaporator for vacuum distillation for 5 hours, then 800 mL of absolute ethanol is added, and the filter residue is filtered after standing for 30 minutes. The filter residue is placed in a drying box for 8 hours to obtain modified wood Sodium sulfonate, take 180g allyl glycidyl ether, 150g end hydrogen-containing silicone oil, stir at 400r / min for 30min, then add 8g 0.1% chloroplatinic acid isopropanol solution dropwise at 0.3g / min, and Heat to 90℃, continue to stir and react for 5h to obtain the reaction solution. Take 240g of modified sodium lignosulfonate and 100g of glacial acetic acid into the reaction solution, stir ...

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Abstract

The invention relates to a preparation method of an organic silicon modified high-molecular cement grinding aid, and belongs to the technical field of cement production. According to the preparation method, sodium lignin sulfonate containing a large number of functional groups is introduced into diethanol amine, then a reaction with modified silicone oil is carried out for preparing an organic silicon modified high-molecular polymer. The organic silicon modified high-molecular polymer has long polyether side chains, and short chains contain a plurality of functional groups of Si-O bonds, hydroxyl groups, carboxyl groups and the like, so that the high-molecular polymer can be easily adsorbed on the surfaces of cement particles, an effect of particle dispersion is exerted, an effect of preventing the healing of cracked interfaces is achieved, the free energy of the surfaces of the cement particles can be effectively reduced, a larger steric hindrance effect can be achieved for the long polyether side chains, the dispersion property of the cement particles is further enhanced, and an effect of accelerating the crack propagation can be exerted. Energy generated in cement production areapplied to crushing the cement particles more, so that the particles are more uniform and fine, and thereby the goals of improving the cement powed grinding efficiency and reducing the energy consumption of the cement are realized.

Description

technical field [0001] The invention relates to a preparation method of an organosilicon-modified polymer cement grinding aid, which belongs to the technical field of cement production. Background technique [0002] The three basic materials of the construction industry refer to steel, cement, and wood. Cement is called "the food of the construction industry" because of its wide range of uses and huge usage. At present, judging from the global technical level and the degree of material development, there will be no material that can replace cement in the construction field in the near future. It can be said that the cement industry is an important basic raw material industry supporting social and economic development. [0003] With the development of the times, the research on cement grinding aids has become more and more in-depth. There are various types of cement grinding aids, with various uses and models, so its classification method is becoming more and more complicate...

Claims

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Application Information

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IPC IPC(8): C08F291/16C08F291/14C08F216/14C08H7/00C04B24/42C04B103/52
CPCC04B40/0039C04B2103/52C08F283/12C08F289/00C08H6/00C04B24/18C04B24/04C04B24/42C08F216/14
Inventor 龙国华王文新史玉玲
Owner 胡果青
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