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Compound silicon dioxide and preparation method thereof and appliance in toothpaste

A silica and composite technology, applied in the field of chemical materials and light industry, can solve the problem that the formula of toothpaste cannot be simplified and the production cost of toothpaste is high, and achieve the effect of good compatibility, stable structure and performance

Active Publication Date: 2015-09-30
ZHAOQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the toothpaste formula, the toothpaste friction agent and the toothpaste thickener are mostly two independent components, so that the toothpaste formula cannot be simplified, resulting in high toothpaste production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of composite silicon dioxide, it comprises the following steps:

[0040] Step 1, the preparation of silica sol: add the sodium sulfate solution that the mass percent concentration is 4% in the first reactor, then add the sulfuric acid solution that the molar concentration is 1mol / L, molar Concentration is the sodium silicate solution of 2mol / L and the ethanol solution of the vinyltriethoxysilane of 15% that mass percent concentration is obtained reaction system, and the pH value before control reaction system reaction is 9, and the pH value after control reaction system reaction The pH value was 4.5, and after the reaction system was completed at 80°C, the stirring was continued for 2 hours to obtain a silica sol;

[0041] In this embodiment, the volume ratio among sodium sulfate solution, sulfuric acid solution, sodium silicate solution and ethanol solution of vinyltriethoxysilane is 1:6:7:0.5.

[0042] Step 2, the activation of sodium carboxymethyl...

Embodiment 2

[0049] A preparation method of composite silicon dioxide, it comprises the following steps:

[0050] Step 1, preparation of silica sol: add a mass percent concentration of 6% sodium sulfate solution into the first reactor, then add sulfuric acid solution with a molar concentration of 1.5mol / L to the first reactor under stirring, A sodium silicate solution with a molar concentration of 2.5mol / L and a methanol solution of vinyltriethoxysilane with a mass percentage concentration of 10% are obtained to obtain a reaction system, and the pH value before the reaction of the reaction system is controlled to be 8, and the reaction of the reaction system is controlled. The final pH value was 4, and after the reaction system was completed at 70°C, the stirring was continued for 1 hour to obtain a silica sol;

[0051] In this embodiment, the volume ratio among sodium sulfate solution, sulfuric acid solution, sodium silicate solution and methanol solution of vinyltriethoxysilane is 1:4:3:...

Embodiment 3

[0059] A preparation method of composite silicon dioxide, it comprises the following steps:

[0060] Step 1, preparation of silica sol: add a mass percent concentration of 8% sodium sulfate solution to the first reactor, and then add sulfuric acid solution and molar concentration of 2mol / L to the first reactor under stirring. A sodium silicate solution with a concentration of 3mol / L and a propanol solution of vinyltriethoxysilane with a concentration of 20% by mass percentage are used to obtain a reaction system, and the pH value of the reaction system before the reaction is controlled to be 10. The pH value of the reaction system was 5, and after the reaction system was completed at 60°C, the stirring was continued for 2.5 hours to obtain a silica sol;

[0061] In this embodiment, the volume ratio among the sodium sulfate solution, the sulfuric acid solution, the sodium silicate solution and the propanol solution of vinyltriethoxysilane is 1:7:8:1.

[0062] Step 2, the activ...

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Abstract

The invention relates to the technical field of light industrial and chemical industry materials, in particular to a compound silicon dioxide and a preparation method thereof and an appliance in toothpaste. The method for preparing the compound silicon dioxide comprises the steps: 1 preparation of silica sols; 2 excitation of sodium carboxymethylcellulose; 3 surface coated reaction of silicon dioxide; and 4 post-processing of products. The method for preparing the compound silicon dioxide has the advantages of simple method, low production cost, no temperature, no special, complex and expensive equipment, and is suitable for mass production. The compound silicon dioxide which is prepared through the preparation method can be used as toothpaste abrasive agent, also can be used as toothpaste thickener, and has the functions of abrasive agent and thickener at the same time, thereby being capable of simplifying compositions of toothpaste, and saving cost.

Description

technical field [0001] The invention relates to the technical field of light industry and chemical materials, in particular to a composite silicon dioxide, its preparation method and its application in toothpaste. Background technique [0002] Abrasives and thickeners are two essential ingredients in toothpaste formulations. During the use of toothpaste, the abrasive in toothpaste is used to remove dirt and colored substances attached to the tooth surface. The raw materials used as toothpaste abrasives generally have the following characteristics: compact structure, particle diameter 5 μm ~ 40 μm, relative enamel abrasion value (RDA) 90-250, and water-insoluble solid particles. Toothpaste abrasives commonly used in toothpaste include calcium carbonate, calcium dihydrogen phosphate, tricalcium phosphate, silicon dioxide, etc. [0003] The function of the toothpaste thickener is to form a stable colloid in the toothpaste, and the formed colloid is used to suspend the solid p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/187A61K8/25A61Q11/00
Inventor 高爱环郭海福钱初洪王淑香闫鹏
Owner ZHAOQING UNIV
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