Preparation method of nuclear shell type CaCO3/SiO2 toothpaste abrasive

A core-shell type and abrasive technology, applied in dentistry, pharmaceutical formulations, cosmetic preparations, etc., can solve problems such as tooth wear, calcium carbonate abrasives and fluoride poor compatibility, and achieve good compatibility

Inactive Publication Date: 2010-02-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of toothpaste abrasive preparation method that core-shell type silicon dioxide coats micron spherical calcium carbonate particle, thereby overcome the

Method used

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  • Preparation method of nuclear shell type CaCO3/SiO2 toothpaste abrasive
  • Preparation method of nuclear shell type CaCO3/SiO2 toothpaste abrasive

Examples

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Effect test

Embodiment 1

[0027]Weigh 1g PSSS and dissolve it in 1000ml distilled water to prepare a PSSS solution with a concentration of 1g / L. At a stirring speed of 300 rev / min, 40 ml of sodium carbonate solution with a concentration of 0.5 mol / L was poured into the PSSS solution, and ammonia water was added to adjust the pH value of the solution to 10. Then, at a stirring speed of 300 rpm, 40 ml of calcium chloride solution with a concentration of 0.5 mol / L was added again; the solution was continuously stirred for 10 min, and then left to stand at room temperature for 48 h. Take out the precipitate, filter, use distilled water 3-5 times, and dry at 90-100°C for 1-2 hours to obtain spherical calcium carbonate particles with an average particle size of 13.5 μm.

[0028] Take by weighing above-mentioned spherical calcium carbonate particle 6g, join in the dehydrated alcohol of 80ml, and add concentration simultaneously and be 5% dodecyltrimethylammonium bromide (CTAB) aqueous solution 20ml, ultrasoni...

Embodiment 2

[0030] Weigh 2g PSSS and dissolve it in 1000ml distilled water to prepare a PSSS solution with a concentration of 2g / L. At a stirring speed of 500 rev / min, 25 ml of sodium carbonate solution with a concentration of 0.5 mol / L was poured into the PSSS solution, and ammonia water was added to adjust the pH value of the solution to 10. Then, at a stirring speed of 500 rpm, 25 ml of calcium chloride solution with a concentration of 0.5 mol / L was added again; the solution was continuously stirred for 10 min, and then left to stand at room temperature for 24 h. Take out the precipitate, filter, use distilled water 3 to 5 times, and dry at 90 to 100°C for 1 to 2 hours to obtain spherical calcium carbonate particles with an average particle size of 11.2 μm ( figure 1 ).

[0031] Take by weighing above-mentioned spherical calcium carbonate particle 2g, join in the dehydrated alcohol of 30ml, and add concentration simultaneously and be 5% dodecyltrimethylammonium bromide (CTAB) aqueous ...

Embodiment 3

[0033] Weigh 4g PSSS and dissolve it in 1000ml distilled water to prepare a PSSS solution with a concentration of 4g / L. At a stirring speed of 200 rpm, pour 30 ml of a sodium carbonate solution with a concentration of 0.5 mol / L into the PSSS solution, and add ammonia water to adjust the pH value of the solution to 10. Then, at a stirring speed of 200 rpm, 30 ml of calcium chloride solution with a concentration of 0.5 mol / L was added again; the solution was continuously stirred for 10 min, and then left to stand at room temperature for 24 h. Take out the precipitate, filter, use distilled water 3-5 times, and dry at 90-100°C for 1-2 hours to obtain spherical calcium carbonate particles with an average particle size of 5.5 μm.

[0034] Take by weighing above-mentioned spherical calcium carbonate particle 2g, join in the dehydrated alcohol of 30ml, and add concentration simultaneously and be 5% dodecyltrimethylammonium bromide (CTAB) aqueous solution 10ml, ultrasonic dispersion 3...

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Abstract

The invention discloses a preparation method of nuclear shell type CaCO3/SiO2 toothpaste abrasive, comprising the following steps of: preparing spherical calcium carbonate grain with grain diameter being 3-15um; taking the spherical calcium carbonate grain as template and ethyl orthosilicate as silicon source; under the catalyticaction of ammonia, coating silicon dioxide on the surface of the spherical calcium carbonate grain in a collosol-gelatin way; and finally obtaining monodispersed and nuclear shell type CaCO3/SiO2 composite structure grain. The preparation method mainly comprises the step of preparing the spherical calcium carbonate grain and the step of preparing the CaCO3/SiO2 toothpaste abrasive. When the nuclear shell type CaCO3/SiO2 spherical grain is used as the toothpaste abrasive, the method has the advantages of good compatibility with fluoride, decontamination effect and friction effect as the market SiO2 abrasive toothpaste.

Description

technical field [0001] The invention relates to a preparation method of a toothpaste abrasive with a core-shell structure. Background technique [0002] Abrasives are the most abundant ingredients in toothpaste, and they mainly clean teeth without wearing them down. Due to various factors, the vast majority of toothpastes are made of single-component abrasives, such as calcium carbonate, silicon dioxide, aluminum hydroxide, calcium hydrogen phosphate, calcium pyrophosphate, etc. Light calcium carbonate is widely used as toothpaste abrasive in my country; silicon dioxide or calcium hydrogen phosphate abrasive is widely used in countries such as the United States and Europe. [1] . Due to the lack of comprehensive performance of a single abrasive (mainly reflected in cleaning ability, cost, compatibility with fluoride, wear on teeth, etc.), toothpaste has been prepared by mixing abrasives or compounding abrasives in recent years. . For example, the abrasive used in a high-e...

Claims

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Application Information

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IPC IPC(8): A61K8/19A61K8/25A61Q11/00
Inventor 王吉会李英董青
Owner TIANJIN UNIV
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