A low specific surface area, low pore volume abrasive silica for toothpaste and a method for preparing the same

CN120057933BActive Publication Date: 2026-06-26ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHAOQING SANJIANG SILICON MATERIALS CO LTD
Filing Date
2024-12-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The specific surface area and pore volume of existing toothpaste-grade silica are difficult to simultaneously meet the requirements of less than 2.79 m2/g and 0.4 cm3/g, resulting in problems such as weak fragrance adsorption, poor dispersion performance, and insufficient cleaning performance when used in toothpaste, and making it difficult to meet foreign export standards.

Method used

A precipitation method was used to prepare abrasive silica for toothpaste with low specific surface area and low pore volume. By controlling reaction conditions such as pH, temperature and stirring speed, an acid-base dropwise reaction of sodium silicate and sulfuric acid solution was used to form a dense silica structure, thereby reducing the specific surface area and pore volume.

Benefits of technology

The prepared silica has extremely low specific surface area and pore volume, good fluoride compatibility, better fragrance permeability, high dispersibility, and strong cleaning power. It meets foreign regulatory requirements and is suitable for use in toothpaste, thus reducing costs.

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Abstract

This invention belongs to the field of silica technology. Specifically, it relates to a low specific surface area and low pore volume abrasive silica for toothpaste and its preparation method. The abrasive silica provided by this invention has a specific surface area of ​​less than 2.79 m². 2 / g and pore volume less than 0.4cm 3 The silica, with a concentration of / g, possesses advantages such as high stability, better fragrance permeability, high dispersibility, high cleaning power, and good fluoride compatibility, making it suitable for use in toothpaste, especially for export toothpaste. The silica preparation method provided by this invention has advantages such as simple process, stability, easy control of conditions, and low cost, making it easier for industrial production and widespread application.
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