Preparation method of toothpaste abrasive silicon dioxide

A silicon dioxide, pure silicon dioxide technology, applied in the direction of silicon dioxide, silicon oxide, cosmetic preparations, etc., can solve the problems of high abrasiveness and transparency effects, and achieve moderate abrasiveness, good transparency, and low price Effect

Active Publication Date: 2012-07-04
冷水江三Ａ新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent CN1079383A discloses a "visually clear gel toothpaste" in which the friction agent added is a precipitated silica, but the toothpaste made of this precipitated silica as an abrasive still has a high degree of abrasiveness , the transparency is also affected to some extent

Method used

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  • Preparation method of toothpaste abrasive silicon dioxide
  • Preparation method of toothpaste abrasive silicon dioxide
  • Preparation method of toothpaste abrasive silicon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Prepare 500g of sodium silicate solution with a weight percent of silicon dioxide of 12%, at a temperature of 40°C

[0016] Add 210g of 20% (weight) sulfuric acid solution, react for 2 hours, adjust the pH value to 3-4 with 20% (weight) sulfuric acid; add 0.6g of ethylene glycol, heat up to 70°C and keep for 2 hours;

[0017] Then wash with water, and use a high-speed disperser at 2700 rpm to beat and disperse the filter cake for 1 hour; flash dry and pulverize to a particle size of 8-10 microns to obtain toothpaste abrasive silica;

[0018] Its physical and chemical properties are as follows

[0019] Embodiment 1: Physicochemical property table of toothpaste friction agent silicon dioxide

[0020]

Embodiment 2

[0022] Prepare 500g of sodium silicate solution with a silicon dioxide content of 15% (weight), add 515g of 10% sulfuric acid (weight) solution at a temperature of 50°C, react for 4 hours, and adjust the pH value to 3-4 with sulfuric acid , add 1.5g of sorbitol, raise the temperature to 80°C, and keep it warm for one hour; then filter, wash with water, and use a high-speed disperser at 2600 rpm to beat and disperse the filter cake for 1 hour; use flash drying and pulverization to obtain Toothpaste abrasive silica with an average particle size of 9-10 microns. Its experimental data are as follows.

[0023] Embodiment 2: Physicochemical property table of toothpaste friction agent silicon dioxide

[0024]

Embodiment 3

[0026] Formulated with a silica content of 13

[0027] % (weight) sodium silicate solution 500g, add and prepare 15% sulfuric acid (weight) solution 303g at a temperature of 50°C, react for 3 hours, adjust the pH value to 4-5 with sulfuric acid, add 1.5g of pentaerythritol, and heat up to 80°C, keep warm for one hour; then filter, wash with water, and use a high-speed disperser at 2400 rpm to beat and disperse the filter cake for 1.5 hours; use

[0028] Flash drying and pulverization obtain toothpaste abrasive silicon dioxide with an average particle size of 8-10 microns. Its experimental data are as follows.

[0029] Embodiment 3: Table of physical and chemical properties of silicon dioxide, abrasive agent for toothpaste

[0030]

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Abstract

The invention relates to a preparation method of toothpaste abrasive silicon dioxide. The preparation method comprises the following steps of: in sodium silicate solution with the concentration of 12-15%, adding 10-30% (weight) sulphuric acid according to weight ratio of pure silicon dioxide to concentrated sulfuric acid of being 1: 0.7, reacting for 2-4 hours at the temperature of 40-50 DEG C to generate silicon dioxide gel; adjusting pH value to be 3-5 with sulphuric acid solution with the concentration of 10-30%; adding polyalcohol accounting for 1-3% of the total weight of silicon dioxide, heating to 60-80 DEG C, insulating for 1-3 hours and carrying out structural control; then filtering, washing, carrying out high pressure beating on filter cakes, curing, and then drying and smashing until average particle size is 8-10Mum. In the invention, the polyalcohol is taken as a structural control agent, the prepared silicon dioxide has appropriate hardness and moderate abrasiveness when being used as toothpaste abrasive, does no harm to gum and has good toothpaste transparency; meanwhile raw materials are available, cost is low, process flow is short, and industrialization is easy to realize.

Description

technical field [0001] The invention relates to a method for preparing toothpaste abrasive silicon dioxide. Background technique [0002] Abrasives are the most abundant ingredients in toothpaste, mainly to clean teeth. At present, most toothpastes are made of single-component abrasives, such as calcium carbonate, silicon dioxide, aluminum hydroxide, and calcium hydrogen phosphate. , calcium pyrophosphate, etc. Light calcium carbonate is widely used as toothpaste abrasives in my country, but these abrasives have some damage to the gums. With the improvement of people's material living standards and health awareness, transparent toothpastes with suitable abrasiveness of silica are welcomed by the public. . At present, the production of silica by wet method is divided into gel method and precipitation method. Due to the single variety of silica in gel method, silica prepared by precipitation method is mainly used as friction agent at present. Silica produced by precipitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12A61K8/25A61Q11/00
Inventor 胡湘仲胡伟民
Owner 冷水江三Ａ新材料科技有限公司
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