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Polycarboxylate-type macromolecular grinding aid and preparation method thereof

A polycarboxylic acid series and polymer technology is applied in the fields of polycarboxylic acid series polymer grinding aids and their preparation, cement grinding aids and their preparation fields, and can solve the problems of unsatisfactory grinding effects of the grinding aids, etc. To achieve the effect of easy control of reaction conditions, stable performance and low requirements for production equipment

Active Publication Date: 2014-12-24
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grinding aid effect of the above grinding aids is not ideal

Method used

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  • Polycarboxylate-type macromolecular grinding aid and preparation method thereof
  • Polycarboxylate-type macromolecular grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Molar ratio: sodium methacrylate: polyethylene glycol monomethyl ether maleate (m = 20-30): polyethylene glycol monomethyl ether methacrylate (m = 20-30) = 1.0:1.0:1.0 Prepare the raw materials. The above raw materials and the initiator ammonium persulfate are diluted with deionized water to form an aqueous solution with a mass concentration of 32%. In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer and a water bath heating condition, add polyethylene glycol monomethyl ether maleate and an aqueous solution of sodium methacrylate sulfonate according to the above molar ratio, stir and heat up to At 60°C, add polyethylene glycol monomethyl ether methacrylate aqueous solution, then open the pear-shaped separatory funnel, and drop the diluted ammonium persulfate aqueous solution into the reaction kettle. The amount of ammonium persulfate before dilution is the total mass of the monomer. 0.5%. The drip control speed is completed within 2 hour...

Embodiment 2

[0025] Molar ratio: sodium methallyl sulfonate: polyethylene glycol monomethyl ether maleate (m= 30-40): polyethylene glycol monomethyl ether methacrylate (m= 30-40 )=1.0:1.0:1.0 Prepare the raw materials. The above raw materials and initiator potassium persulfate are diluted with deionized water to form an aqueous solution with a mass concentration of 35%. In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer and a water bath heating condition, add polyethylene glycol monomethyl ether maleate and an aqueous solution of sodium methacrylate sulfonate according to the above molar ratio, stir and heat up to 70°C, add polyethylene glycol monomethyl ether methacrylate aqueous solution, then open the pear-shaped separatory funnel, and drop diluted potassium persulfate aqueous solution into the reaction kettle, the amount of potassium persulfate before dilution is the total mass of the monomer 1%. The drip control speed is completed within 2 hours. Afte...

Embodiment 3

[0027] Molar ratio: sodium methallyl sulfonate: polyethylene glycol monomethyl ether maleate (m= 30-40): polyethylene glycol monomethyl ether methacrylate (m= 30-40 ) = 1.0:1.0:1.0 Prepare the raw materials. The above raw materials and the initiator sodium persulfate are diluted with deionized water to form an aqueous solution with a mass concentration of 40%.

[0028] In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer and a water bath heating condition, add polyethylene glycol monomethyl ether maleate and an aqueous solution of sodium methacrylate sulfonate according to the above molar ratio, stir and heat up to 80°C, add polyethylene glycol monomethyl ether methacrylate aqueous solution, then open the pear-shaped separatory funnel, add the diluted sodium persulfate aqueous solution dropwise into the reaction kettle, the amount of sodium persulfate before dilution is the total mass of the monomer 3%. The drip control speed is completed within ...

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Abstract

The invention discloses a polycarboxylate-type macromolecular grinding aid and a preparation method thereof, belonging to the field of a cement adjuvant. According to the invention, the polycarboxylate-type grinding aid is synthesized by using polyethylene methyl ether methacrylate, polyethylene glycol monomethyl ether maleate and sodium methallyl sulfonate as raw materials through a macromolecular direct copolymerization process, thereby effectively realizing a synergistic effect of a plurality of organic functional groups, overcoming the defects of the existing micromolecular cement grinding aid products, improving grinding grid and strengthening effects. The polycarboxylate-type macromolecular grinding aid and the preparation method thereof are simple in production technology, control reaction conditions easily, and have low requirements to production equipments, and are good for industrial popularization and application.

Description

technical field [0001] The invention relates to a cement grinding aid and a preparation method thereof, in particular to a polycarboxylate polymer grinding aid and a preparation method thereof, and belongs to the field of cement additives. Background technique [0002] During the production of cement, electricity consumption for grinding is high. Adding an appropriate amount of grinding aids in the grinding production of cement can not only reduce energy consumption, realize energy-saving and high-yield ball mills, but also increase the specific surface area of ​​cement without increasing the grinding time, thereby improving the strength and quality of cement . [0003] Traditionally used grinding aids are mostly ethylene glycol, triethanolamine or their compounds, which have problems such as limited strengthening effect, narrow adaptability, poor stability, high product price, and certain harm to the environment. Based on the above reasons, it is inevitable to seek a new ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C08F290/06C04B103/52
Inventor 郭辉张国宝庄玉伟曹健赵根锁
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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