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A kind of preparation method of light calcium carbonate silica composite material

A technology of light calcium carbonate and composite materials, applied in chemical instruments and methods, calcium carbonate/strontium/barium, silicon compounds, etc., can solve problems such as high cost, uneven particle size, poor cleaning effect, etc., and achieve quality Lightweight, uniform particle size effect

Active Publication Date: 2020-12-15
ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium carbonate has strong abrasiveness and can remove stubborn stains such as tea stains and smoke stains on the tooth surface. However, natural calcium carbonate has many edges and corners after being crushed, resulting in a high radioactive dentin abrasion (RDA) value. Toothpaste is easy to damage the enamel of teeth, and calcium carbonate has technical defects such as decomposition under acidic conditions, uneven appearance, and uneven particle size
Silica has good thixotropy and wear resistance, and its good thixotropy can effectively solve the problem of toothpaste slag when brushing teeth. At the same time, because its wear resistance coefficient matches the teeth, it reduces the wear of teeth, and chemical The properties are stable, but the abrasiveness of silica cannot remove stubborn stains on tooth enamel, and the cost of silica as an abrasive in toothpaste is also very high
The RDA value of the silica prepared by this method is 120-140, and the PCR value is 120-140, which has excellent cleaning performance, but its cleaning effect on stubborn stains on tooth enamel is not good
[0005] In summary, there are generally technical problems in the prior art such as high RDA value of calcium carbonate, damage to enamel, low friction of silica, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a kind of light calcium carbonate silica composite material

[0027] The preparation method of described light calcium carbonate silica composite material, comprises the following steps:

[0028] S1. Put quicklime into a refractory bowl, put the refractory bowl on a high-temperature tray in a high-temperature furnace, raise the temperature to 1100°C, heat-preserve and calcinate for 12 hours, then naturally cool down to 25°C, seal and store, and obtain calcium oxide at room temperature;

[0029] S2. The normal temperature calcium oxide prepared in step S1 was pulverized to 5 μm, added to the reaction tank, and deionized water was added for airflow stirring. The mass ratio of calcium oxide to deionized water was 1:16, and the stirring time was 1.5h. Calcium oxide and deionized water are fully contacted to obtain a calcium hydroxide solution;

[0030] S3, the calcium hydroxide solution that step S2 is made is heated to 40 ℃ by steam, then drop into sodium ca...

Embodiment 2

[0033] Embodiment 2, a kind of light calcium carbonate silica composite material

[0034] The preparation method of described light calcium carbonate silica composite material, comprises the following steps:

[0035] S1. Put quicklime into a refractory bowl, put the refractory bowl on a high-temperature tray in a high-temperature furnace, raise the temperature to 1150°C, heat-preserve and calcinate for 12 hours, then naturally cool down to 25°C, seal and store, and obtain calcium oxide at room temperature;

[0036] S2, crush the normal temperature calcium oxide prepared in step S1 to 5 μm, add it to the reaction tank, add deionized water for air flow stirring, the mass ratio of calcium oxide to deionized water is 1:17, and the stirring time is 2h, let the oxidation Calcium and deionized water are fully contacted to obtain a calcium hydroxide solution;

[0037] S3, the calcium hydroxide solution that step S2 is made is heated to 45 ℃ by steam, then drop into sodium carbonate s...

Embodiment 3

[0040] Embodiment 3, a kind of light calcium carbonate silica composite material

[0041] The preparation method of described light calcium carbonate silica composite material, comprises the following steps:

[0042] S1. Put quicklime into a refractory bowl, put the refractory bowl on a high-temperature tray in a high-temperature furnace, raise the temperature to 1200°C, heat-preserve and calcinate for 12 hours, then naturally cool down to 25°C, seal and store, and obtain calcium oxide at room temperature;

[0043] S2. The normal temperature calcium oxide prepared in step S1 was pulverized to 5 μm, added to the reaction tank, and deionized water was added for airflow stirring. The mass ratio of calcium oxide to deionized water was 1:17.4, and the stirring time was 2.5h. Calcium oxide and deionized water are fully contacted to obtain a calcium hydroxide solution;

[0044] S3, the calcium hydroxide solution that step S2 is made is heated to 50 ℃ by steam, then drop into sodium ...

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Abstract

The invention belongs to the technical field of silica, and in particular relates to a preparation method of a light calcium carbonate silica composite material. The preparation method of the light calcium carbonate-silica composite material provided by the present invention includes two steps of calcium carbonate reaction and silica reaction. The calcined calcium oxide reacts with water to generate calcium hydroxide, and the calcium hydroxide reacts with sodium carbonate to generate calcium hydroxide. Light calcium carbonate, on this basis, reacts with sodium silicate solution and sulfuric acid solution to generate silicon dioxide, so as to prepare a composite material with calcium carbonate as the core and silicon dioxide as the outer layer. The light calcium carbonate silica composite material provided by the invention adopts silica to coat the calcium carbonate material, improves the acid resistance of the calcium carbonate, reduces the RDA value of the calcium carbonate, and can protect the teeth and remove the enamel when applied in toothpaste. stubborn stains.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a preparation method of a light calcium carbonate silicon dioxide composite material. Background technique [0002] Toothpaste is an indispensable daily necessities in people's daily life and has a long history. With the continuous development of science and technology, the continuous improvement and perfection of process equipment, various types of toothpaste have come out one after another, the quality and grade of toothpaste products are also continuously improved, and its friction performance and cleaning and polishing performance are also in urgent need of improvement. [0003] Common toothpaste abrasives include inorganic substances such as calcium carbonate and silicon dioxide. Calcium carbonate has strong abrasiveness and can remove stubborn stains such as tea stains and smoke stains on the tooth surface. However, natural calcium carbonate has many ed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18C01B33/193A61K8/25A61K8/19A61Q11/00
CPCA61K8/19A61K8/25A61K2800/28A61Q11/00C01B33/187C01B33/193C01F11/18C01P2004/61C01P2004/84C01P2006/12
Inventor 王宪伟郑松玲庹文喜王义品蒋建华
Owner ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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