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Grinding-aid dispersant of inorganic powder body of aqueous acrylic phosphinates and preparation method thereof

A water-based acrylic acid and phosphinate technology, applied in the field of grinding aid dispersants, can solve the problems of uneven component ratio, many kinds of raw materials, complex components, etc., and achieve lower oil absorption value, simple equipment, and improved compatibility. Sexual and Dispersive Effects

Active Publication Date: 2010-11-17
FOSHAN SANSHUI JINGE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the technology of the above-mentioned patents can increase the grinding aid efficiency and improve the dispersion effect, they all adopt the compounding method of various raw materials to prepare the grinding aid dispersant. It is prone to incompatibility with the processed powder, which causes the inhomogeneity of the proportion of each component, and the processed powder will increase the maintenance of product quality due to its complex components during use. difficulty of stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 5g of sodium hypophosphite and 100ml of deionized water into a 500ml three-necked bottle in turn, put them into a constant temperature water bath, stir and raise the temperature to 40°C; add 40g of acrylic acid and 20g of methyl acrylate monomer into 40g of water to obtain a monomer mixture solution; 0.65g ammonium persulfate and 0.65g sodium thiosulfate are dissolved in 20g water and obtain initiator solution; Then in there-necked bottle, dropwise monomer mixture solution and initiator solution simultaneously, keep feeding speed evenly, add in 2 hours ( The dropping speed former is 1 g / min, the latter is 0.2 g / min), after the dropwise addition is completed, the temperature is raised to 85°C, and after the reaction is continued for 1 hour, the pH value is carried out to 6~7 with 1mol / L sodium hydroxide solution, After cooling to room temperature, the material is discharged, and the product is a water-soluble transparent solution.

Embodiment 2

[0031]Add 7.5g of sodium hypophosphite and 100ml of deionized water to a 500ml three-necked bottle, put them into a constant temperature water bath, stir and raise the temperature to 50°C; add 45g of acrylic acid and 15g of ethyl acrylate monomer into 60g of water to obtain a monomer mixture solution, Dissolve 0.9g of ammonium persulfate and 0.9g of sodium thiosulfate in 30g of water to obtain an initiator solution; then add the monomer mixture solution and the initiator solution dropwise into the three-necked bottle at the same time, keep the feeding speed uniform, and complete the addition within 2.5 hours (the dropping rate former is 1.2 g / min, and the latter is 0.25 g / min). After the dropwise addition, the temperature was raised to 90°C, and the reaction was continued for 0.5 hours, and the pH value was adjusted to 7-8 with 1mol / L sodium hydroxide solution, and the product was discharged after cooling to room temperature, and the product was a water-soluble transparent solu...

Embodiment 3

[0033] Add 8g of sodium hypophosphite and 100ml of deionized water to a 500ml three-necked bottle in turn, put them into a constant temperature water bath, stir and raise the temperature to 70°C; add 60g of acrylic acid and 10g of ethyl acrylate monomer into 105g of water to obtain a monomer mixture solution, and 0.35g sodium persulfate and 0.35g sodium thiosulfate are dissolved in 30g water and obtain initiator solution; Then dropwise monomer mixture solution and initiator solution simultaneously, keep feeding rate evenly, add in 3 hours (the former of rate of addition is 1.4 g / min, the latter 0.25 g / min). After the dropwise addition, the temperature was raised to 90°C, and the reaction was continued for 4 hours, and the pH value was adjusted to 6-7 with 1mol / L sodium hydroxide solution, and the product was discharged after cooling to room temperature, and the product was a water-soluble transparent solution.

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Abstract

The invention discloses a grinding-aid dispersant of inorganic powder body of aqueous acrylic phosphinates and a preparation method thereof. The grinding-aid dispersant comprises the following raw materials in percentage by weight: 1-6% of sodium hypophosphite, 9-34% of acrylic monomers, 0.5-5% of free radical initiators and 60-80% of water. The preparation method comprises the following steps: stirring aqueous solution of the sodium hypophosphite and raising the temperature to 40-70 DEG C; adding the acrylic monomer solution with concentration of 25-75% in percentage by weight and the free radical initiator aqueous solution with concentration of 1-8% in percentage by weight and keeping uniform charging speed, then raising the temperature to 85-90 DEG C and reacting for 0.5-4 hours; and regulating the pH value of the obtained product to be 6-8 with sodium hydroxide solution and discharging the product after cooling the product to room temperature. The grinding-aid dispersant is applied to improving the grinding efficiency in grinding production of inorganic materials and simultaneously improving the mobility and dispersibility of the powder body.

Description

technical field [0001] The invention relates to a grinding aid dispersant, in particular to a water-based acrylic phosphinate inorganic powder grinding aid dispersant and a preparation method thereof. Efficiency and dispersion effect. Background technique [0002] Grinding aid dispersant is a kind of chemical admixture with surface activity. In the crushing production of inorganic powder, grinding aid dispersant is adsorbed on the surface of inorganic material, which can reduce its surface tension, reduce mutual agglomeration between powders, and improve Grinding efficiency, while improving the fluidity and dispersion of powder. [0003] Traditional grinding aids are mainly inorganic phosphates (such as sodium tripolyphosphate, sodium pyrophosphate, sodium hexametaphosphate, etc.), which have the characteristics of high grinding efficiency, but the fluidity and dispersibility of the powder obtained Often the application requirements cannot be met. Grinding aids such as po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C08F220/06C08F8/40C09K23/52
Inventor 姜宏伟薛妮娜
Owner FOSHAN SANSHUI JINGE NEW MATERIALS CO LTD
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