Preparation method of silicon dioxide for low-specific-surface-area high-density thickening type toothpaste

A low specific surface area, silicon dioxide technology, applied in the direction of chemical instruments and methods, cosmetic preparations, dressing preparations, etc., can solve the problems of low apparent density, high specific surface area, poor friction performance, etc., to achieve surface The effect of high apparent density and small specific surface area

Active Publication Date: 2020-08-04
GUANGZHOU FEIXUE MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silica prepared by this method has the characteristics of high dispersion, low specific surface area and high transparency, but its RDA value is low, the apparent density is low, the friction performance is not good, and the transportation cost is high
[0006] In summary, technical problems such as low RDA value, low apparent density, and high specific surface area generally exist in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a kind of silicon dioxide for low specific surface area high density thickening type toothpaste

[0027] The preparation method of silicon dioxide for described low specific surface area high density thickening type toothpaste comprises the following steps:

[0028] S1, dissolving the water glass with a modulus of 3.3 in deionized water, adding deionized water after aging for 5 hours to form a water glass solution with a molar concentration of 1.25mol / L;

[0029] S2, configuration molar concentration is the sulfuric acid solution of 6mol / L;

[0030] S3, the sodium sulfate solution that is 10% by mass percent is added in the reaction tank, and the add-on of sodium sulfate solution is 11m 3 , turn on the stirring device, the stirring speed is 30Hz, the temperature is raised to 70°C, and then the water glass solution configured in step S1 and the sulfuric acid solution configured in step S2 are added dropwise at the same time, and the addition amount of the ...

Embodiment 2

[0033] Embodiment 2, a kind of silicon dioxide for low specific surface area high density thickening type toothpaste

[0034] The preparation method of silicon dioxide for described low specific surface area high density thickening type toothpaste comprises the following steps:

[0035] S1, dissolving water glass with a modulus of 3.4 in deionized water, adding deionized water after aging for 5.2 hours to form a water glass solution with a molar concentration of 1.3 mol / L;

[0036] S2, configuration molar concentration is the sulfuric acid solution of 6.2mol / L;

[0037] S3, the sodium sulfate solution that is 10.6% by mass percent is added in the reaction tank, and the addition of sodium sulfate solution is 11.5m 3 , turn on the stirring device, the stirring speed is 32Hz, and the temperature is raised to 72°C, then simultaneously dropwise add the water glass solution configured in step S1 and the sulfuric acid solution configured in step S2, the addition amount of the water gl...

Embodiment 3

[0040] Embodiment 3, a kind of silicon dioxide for low specific surface area high density thickening type toothpaste

[0041] The preparation method of silicon dioxide for described low specific surface area high density thickening type toothpaste comprises the following steps:

[0042] S1, dissolving the water glass with a modulus of 3.5 in deionized water, adding deionized water after aging for 5.4 hours to form a water glass solution with a molar concentration of 1.35mol / L;

[0043] S2, configuration molar concentration is the sulfuric acid solution of 6.4mol / L;

[0044] S3, the sodium sulfate solution that is 11.3% by mass percent is added in the reaction tank, and the addition of sodium sulfate solution is 12m 3 , turn on the stirring device, the stirring speed is 34Hz, and the temperature is raised to 75° C., then simultaneously dropwise add the water glass solution configured in step S1 and the sulfuric acid solution configured in step S2, and the addition amount of th...

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Abstract

The invention belongs to the technical field of silicon dioxide, and particularly relates to a preparation method of silicon dioxide for low-specific-surface-area high-density thickening type toothpaste. The silicon dioxide for the low-specific-surface-area high-density thickening type toothpaste is prepared by the following steps: taking a sodium sulfate solution with the mass concentration of 10-12% as a mother solution, dripping a sodium silicate solution with the molar concentration of 1.25-1.5 mol/L and a sulfuric acid solution with the molar concentration of 6-7mol/L at the same time, and carrying out a reaction at a segmented temperature and a segmented pH value. When the silicon dioxide for the thickening type toothpaste prepared by the preparation method provided by the inventionis applied to the preparation process of the toothpaste, the time can be shortened, the dust can be reduced, the cost can be saved in the transportation process, and the cleaning effect of the toothpaste cannot be reduced when the silicon dioxide is compounded with the friction type silicon dioxide in the toothpaste body.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a method for preparing silicon dioxide for low specific surface area and high density thickening toothpaste. Background technique [0002] Silica is an important component of toothpaste formula. Due to its stable chemical properties, it has good compatibility with other components of toothpaste, good taste dispersion, high fluorine compatibility, high purity, and a wide range of refractive index. It is wide enough to prepare transparent toothpaste, so it gradually replaces natural calcium carbonate, calcium hydrogen phosphate, light calcium carbonate and calcium pyrophosphate as the main raw material of toothpaste. [0003] The silica prepared by the precipitation method has the advantages of good dispersibility, strong suspension ability, stable physical and chemical properties, non-toxic and non-polluting, etc. It is mainly divided into thickeners and abrasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/193A61K8/25A61Q11/00
CPCA61K8/25A61K2800/28A61Q11/00C01B33/193C01P2006/12C01P2006/19C01P2006/90
Inventor 胡非任振雪梁少彬张梦梅林英光
Owner GUANGZHOU FEIXUE MATERIAL TECH
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