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Alcohol amine-carboxylic acid polymer as well as preparation method and application thereof

A technology of carboxylic acid series and polymers, which is applied in the field of alcohol amine-carboxylic acid series polymers, can solve the problems of unstable performance, high price, sensitive dosage, etc., achieve excellent grinding aid effect, improve compatibility, prevent The effect of particle agglomeration

Inactive Publication Date: 2013-07-10
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, studies and applications have shown that although the grinding aids compounded by these small molecules have better grinding aid enhancement effects, they generally have unstable performance, sensitive dosage, and high price during use. Water consumption and the adaptability of cement and admixtures have an impact, especially the compatibility of cement and water reducers is the most prominent
At present, small-molecule grinding aids can no longer fully meet market demand and enterprise requirements, so it is necessary to optimize the structure of grinding aid molecules and give full play to the role of functional groups in grinding aid molecules, thereby improving the performance of grinding aids. Comprehensive performance

Method used

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  • Alcohol amine-carboxylic acid polymer as well as preparation method and application thereof
  • Alcohol amine-carboxylic acid polymer as well as preparation method and application thereof
  • Alcohol amine-carboxylic acid polymer as well as preparation method and application thereof

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preparation example Construction

[0030] The preparation method of above-mentioned alcohol amine-carboxylic acid polymer, comprises the following steps:

[0031] A, esterification process: carry out esterification reaction to N-methyldiethanolamine, maleic anhydride to prepare N-methyldiethanolamine maleate, also add catalyst, dehydrating agent and polymerization inhibitor in the esterification reaction; The molecular structural formula of N-methyldiethanolamine maleate is as follows:

[0032]

[0033] B. Polymerization process: Copolymerize N-methyldiethanolamine maleate, isopentenol polyoxyethylene ether and initiator in aqueous solution by dropwise addition.

[0034] Wherein, step A specifically includes: sequentially adding N-methyldiethanolamine, maleic anhydride, catalyst, dehydrating agent and polymerization inhibitor into the reaction vessel, heating and stirring continuously, controlling the reaction temperature at 110-120°C, and dehydration reaction After several hours, the dehydrating agent and ...

Embodiment 1

[0051] Add 119.0g N-methyldiethanolamine, 98.0g maleic anhydride, 3.2g concentrated sulfuric acid, 98.0g dehydrating agent, 1.1g Inhibitor, heat up and stir constantly, control the reaction temperature at 110-120°C, react for 4-8 hours, distill under reduced pressure and recover the dehydrating agent and unreacted raw materials, and obtain N-methyldiethanolamine after separation and purification maleate.

[0052] Take 20.0g of the prepared N-methyldiethanolamine maleate and dilute it with 107.0g deionized water to a concentration of 15.7% and add it to the reaction vessel. When the temperature is kept at 85±1°C, use a peristaltic pump to A certain rate drips 35.7 g of ammonium persulfate initiator solution with a concentration of 5.5% after dilution and 143.0 g of prenyl alcohol polyoxyethylene ether solution with a concentration of 50.0% after dilution, and the rate of addition is controlled within 5 hours. After 2-4 hours, cool the obtained product to below 40°C, adjust it ...

Embodiment 2

[0054] Add 80.0g of N-methyldiethanolamine, 65.0g of maleic anhydride, 2.5g of concentrated sulfuric acid, 65.0g of dehydrating agent, 0.72g of sulfuric acid into the reaction vessel equipped with constant temperature oil bath, thermometer, stirrer and condenser etc. Polymerizing agent, heating and stirring constantly, control the reaction temperature at 110-120°C, react for 3-7 hours, distill under reduced pressure and recover dehydrating agent and unreacted raw materials, obtain N-methyldiethanolamine horse after separation and purification to esters.

[0055] Dilute 27.0g of the above-prepared N-methyldiethanolamine maleate with 115.0g of deionized water to a concentration of 19.0% and add it to the reaction vessel. When the temperature is kept at 85±1°C, use a peristaltic pump to the reaction vessel Add 41.5 g of the initiator solution with a concentration of 6.6% after dilution and 149.0 g of prenol polyoxyethylene ether solution with a concentration of 48.3% after diluti...

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Abstract

The invention discloses an alcohol amine-carboxylic acid polymer. The molecular structural formula of the principal component of the alcohol amine-carboxylic acid polymer is as follows: a,b=2-20, and n=20-60. The invention also provides a method for preparing the alcohol amine-carboxylic acid polymer and an application thereof as a cement grinding aid. The alcohol amine-carboxylic acid polymer disclosed by the invention can improve the consistency of cement and a water-reducing agent as the cement grinding aid and has the advantages of outstanding grind aiding effect, excellent general effect, stability in property, low cost, small effective mixing amount and wide application prospect.

Description

technical field [0001] The invention relates to an alcohol amine-carboxylic acid polymer, its preparation method and its application as cement grinding aid in improving the compatibility of cement and water reducing agent. Background technique [0002] In the cement industry, most of the electric energy is consumed in the grinding process of materials (including raw meal and clinker). An effective measure of efficiency. Grinding aids are usually a kind of strong polar surfactants. These organic molecules can be adsorbed on the surface of cement particles and micro-cracks during the cement grinding process, reducing surface free energy and interfacial tension, and providing external ion neutralization. The unsaturated charge on the fractured surface of the particles reduces or eliminates the adhesion and agglomeration between the particles, so as to aid in the dispersion of grinding, improve the grinding efficiency, improve the gradation of cement particles, and achieve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/22C08F216/14C04B24/26C04B103/52
Inventor 王栋民赵计辉王振华王剑锋李端乐王学光唐官宝
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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