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Polycarboxylic acid-alcohol amine polymer grinding aid and preparation method thereof

An alkanolamine type, polymer technology, applied in cement production and other directions, can solve problems such as endangering building safety, and achieve the effects of improving grinding aid performance, convenient operation and simple production process

Active Publication Date: 2011-01-26
厦门兑泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some unscrupulous companies even add some harmful substances, such as bringing in more Cl ions, thus endangering building safety

Method used

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  • Polycarboxylic acid-alcohol amine polymer grinding aid and preparation method thereof
  • Polycarboxylic acid-alcohol amine polymer grinding aid and preparation method thereof
  • Polycarboxylic acid-alcohol amine polymer grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Molar ratio: methacrylic acid: polyethylene glycol monomethyl ether: sodium methacrylate: triethanolamine = 3.0: 1.0: 1.0: 1.0 Raw materials are prepared; the molecular weight of polyethylene glycol monomethyl ether is 1000.

[0054]The above raw materials, initiator ammonium persulfate, and polymerization inhibitor hydroquinone were all diluted with deionized water into aqueous solutions with a concentration of 32%.

[0055] In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer, and heated in a water bath, add methacrylic acid and polyethylene glycol monomethyl ether aqueous solution according to the above molar ratio to raise the temperature and stir. When the temperature is raised to 60°C, add diluted hydroquinone aqueous solution into the reactor, the mass of hydroquinone before dilution is 0.03% of the total mass of reactants, continue to heat up and stir, and keep it at 80°C for 1 hour. Keep the temperature at 80°C, add sodium methacry...

Embodiment 2

[0057] Molar ratio: methacrylic acid: polyethylene glycol monomethyl ether: sodium methacrylate: triethanolamine = 3.5: 1.0: 1.0: 1.5 Raw materials are prepared; the molecular weight of polyethylene glycol monomethyl ether is 1200.

[0058] The above raw materials, initiator ammonium persulfate, and polymerization inhibitor hydroquinone were all diluted with deionized water into aqueous solutions with a concentration of 35%.

[0059] In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer, and heated in a water bath, add methacrylic acid and polyethylene glycol monomethyl ether aqueous solution according to the above molar ratio to raise the temperature and stir. When the temperature is raised to 40°C, add diluted hydroquinone aqueous solution into the reaction kettle, the mass of hydroquinone before dilution is 0.05% of the total mass of reactants, continue to heat up and stir, and keep it at 70°C for 2 hours. Keep the temperature at 70°C, add sodiu...

Embodiment 3

[0061] Molar ratio: methacrylic acid: polyethylene glycol monomethyl ether: sodium methacrylate: triethanolamine = 4.0: 1.0: 1.0: 1.0 Raw materials are prepared; the molecular weight of polyethylene glycol monomethyl ether is 1000.

[0062] The above raw materials, initiator ammonium persulfate, and polymerization inhibitor hydroquinone were all diluted with deionized water into aqueous solutions with a concentration of 38%.

[0063] In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer, and heated in a water bath, add methacrylic acid and polyethylene glycol monomethyl ether aqueous solution according to the above molar ratio to raise the temperature and stir. When the temperature rises to 50°C, add diluted hydroquinone aqueous solution into the reaction kettle, the mass of hydroquinone before dilution is 0.06% of the total mass of reactants, continue to heat up and stir, and keep it at 75°C for 1.5 hours. Keep the temperature at 75°C, add sodium ...

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Abstract

The invention discloses polycarboxylic acid-alcohol amine polymer grinding aid and a preparation method thereof, which relates to cement grinding aid. The general formula of the polycarboxylic acid-alcohol amine polymer grinding aid is RCOONH(CH2CH2OH)3. The raw materials comprise methacrylic acid, polyethylene glycol monomethyl ether, sodium methallyl sulfonate and triethanolamine at a molar ratio of 3.0-4.0:1.0:1.0:1.0-1.5; and the preparation method comprises the following steps: 1, adding diluted aqueous solution of methacrylic acid and polyethylene glycol monomethyl ether in a reaction kettle, heating and stirring; 2, when the temperature is increased to 40 to 60 DEG C, adding the aqueous solution of polymerization inhibitor, continuing heating and stirring, keeping the temperature at 70 to 80 DEG C and reacting for 1 to 2h; 3, keeping the temperature at 70 to 80 DEG C, adding the aqueous solution of sodium methallyl sulfonate and dripping the aqueous solution of initiator; 4, adding the aqueous solution of triethanolamine, keeping the temperature at 70 to 80 DEG C and reacting for 3 to 4h; and 5, cooling the mixture to 40 to 60 DEG C and neutralizing with strong base so as to cause a pH value to be 6.5 to 7.5. The polycarboxylic acid-alcohol amine polymer grinding aid of the invention has the advantages of improving the early and later strength of the grinding aid and the cement due to the synergistic effect of various functional groups.

Description

Technical field: [0001] The invention relates to a cement grinding aid and a preparation method thereof, in particular to a polycarboxylic acid-alcohol amine polymer cement grinding aid and a preparation method thereof. Background technique: [0002] In the grinding production of cement, a proper amount of grinding aid is added, through the surface activity and charge dispersion of the grinding aid, the physical and chemical modification of the surface of the material particles can be achieved, and the interface effect can be exerted, thereby improving the grindability of the material and reducing the particle size. The cohesion and agglomeration effect between the ball mills can eliminate the phenomenon of fine particles sticking to the lining board, improve the fluidity of the materials in the mill, and realize the purpose of energy saving and high production of the ball mill. At the same time, without increasing the grinding time, the cement particle gradation can be opti...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F283/06C04B103/52
CPCC04B24/165C04B2103/52Y02P40/10
Inventor 李生钉李生利彭其雨李生许张建丰
Owner 厦门兑泰新材料科技有限公司
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