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A kind of preparation method of silica for high oil-absorbing low-viscosity toothpaste

A technology of silica and low viscosity, which is applied in the direction of silica, silica, and cosmetic preparations, etc., can solve problems such as low oil absorption value of silica, affect consumer experience, and increase the viscosity of toothpaste. Uniform diameter, good for storage and lower viscosity

Active Publication Date: 2021-11-19
GUANGZHOU FEIXUE MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned preparation method is simple and easy to operate, there are problems such as low oil absorption value, high viscosity and poor stability in the prepared silicon dioxide.
If the silicon dioxide, which has this problem, is used as the main component of toothpaste, the viscosity of the toothpaste will increase linearly after being applied to the toothpaste. Therefore, it is necessary to compound with other ingredients or change the formula of the toothpaste to solve the toothpaste viscosity. Big problem, but it doesn't fundamentally solve the technical problem
And the viscosity of toothpaste will gradually increase with time, which will affect the experience of consumers

Method used

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  • A kind of preparation method of silica for high oil-absorbing low-viscosity toothpaste

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Effect test

Embodiment 1

[0031] Embodiment 1 A kind of preparation method of silicon dioxide for high oil-absorbing low-viscosity toothpaste

[0032] The preparation method of silicon dioxide for described high oil-absorbing low-viscosity toothpaste, comprises the steps:

[0033] S1. After liquefying sodium silicate with a modulus of 1.5 at high temperature, add water to dilute, dissolve and age for 5 hours, and then add water to dilute to form a sodium silicate solution with a concentration of 0.5M;

[0034] S2, take concentration is 6% sodium sulfate solution 5m 3 Add it into a clean reaction tank, then add 0.05% sodium dodecylbenzenesulfonate and 0.1% polyvinyl alcohol 1788 in the mass of solid sodium silicate in step S1, heat up to 55°C, turn on the stirring speed of 30Hz, and dissolve evenly Then dropwise concentration is the sodium silicate solution of 2.0M sulfuric acid solution and step S1 gained, control reaction process pH is 8; The rate of addition of described sulfuric acid solution is 2m...

Embodiment 2

[0036] Embodiment 2 A kind of preparation method of silicon dioxide for high oil-absorbing low-viscosity toothpaste

[0037] The preparation method of silicon dioxide for described high oil-absorbing low-viscosity toothpaste, comprises the steps:

[0038] S1. After liquefying sodium silicate with a modulus of 2.5 at high temperature, add water to dilute, dissolve and age for 6.5 hours, and then add water to dilute to form a sodium silicate solution with a concentration of 0.8M;

[0039] S2. Take 8m of sodium sulfate solution with a concentration of 4%. 3 Add it into a clean reaction tank, then add 0.1% sodium dodecylbenzenesulfonate and 0.3% polyvinyl alcohol 1788 in the mass of solid sodium silicate in step S1, heat up to 50°C, turn on the stirring speed of 40Hz, and dissolve evenly Then dropwise concentration is the sodium silicate solution of 2.3M sulfuric acid solution and step S1 gained, control reaction process pH is 9; The dropping speed of described sulfuric acid solu...

Embodiment 3

[0041] Embodiment 3 A kind of preparation method of silicon dioxide for high oil-absorbing low-viscosity toothpaste

[0042] The preparation method of silicon dioxide for described high oil-absorbing low-viscosity toothpaste, comprises the steps:

[0043] S1. After liquefying sodium silicate with a modulus of 3.0 at high temperature, add water to dilute, dissolve and age for 8 hours, and then add water to dilute to prepare a sodium silicate solution with a concentration of 3.0M;

[0044] S2. Take 20m of sodium sulfate solution with a concentration of 10%. 3 Add it into a clean reaction tank, then add 1.0% sodium dodecylbenzenesulfonate and 2.0% polyvinyl alcohol 1788 in the mass of solid sodium silicate in step S1, heat up to 90°C, turn on the stirring speed of 60Hz, and dissolve evenly Then dropwise concentration is the sodium silicate solution of 5.5M sulfuric acid solution and step S1 gained, control reaction process pH is 10.5; The dripping speed of described sulfuric aci...

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Abstract

The invention belongs to the technical field of silicon dioxide preparation, and in particular relates to a method for preparing silicon dioxide for toothpaste with high oil absorption and low viscosity. The preparation method of silicon dioxide for high oil-absorbing and low-viscosity toothpaste provided by the invention uses sodium silicate and sulfuric acid with a modulus of 1.5 to 3.5 as reaction raw materials, by adding sodium dodecylbenzenesulfonate ( SDBS) and polyvinyl alcohol (PVA), and by controlling key parameters such as reaction bottom liquid, material concentration, reaction pH value and reaction temperature, the silica has high oil absorption value, low viscosity and good dispersion effect. At the same time, it is applied in toothpaste, which can effectively reduce the initial viscosity of toothpaste, effectively improve the service life of toothpaste, and is beneficial to toothpaste storage.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide preparation, and in particular relates to a method for preparing silicon dioxide for toothpaste with high oil absorption and low viscosity. Background technique [0002] Abrasives account for a large proportion in the toothpaste formula. Abrasives can remove dirt on the surface of teeth. Good abrasives not only have the effect of cleaning teeth and removing plaque, but also cannot cause excessive wear and tear on teeth. In the prior art, silica has very stable physical and chemical properties, acid and alkali resistance, high temperature resistance, no pollution to the environment, good cleaning performance, good compatibility with raw materials in toothpaste, and high fluorine compatibility, thus replacing Other raw materials such as calcium carbonate are used as abrasives and thickeners in toothpaste. [0003] In the prior art, the precipitation method is used to produce silica. Concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12A61K8/25A61K8/46A61K8/81A61Q11/00
CPCA61K8/25A61K8/466A61K8/8129A61K2800/28A61Q11/00C01B33/12C01P2004/61C01P2006/19
Inventor 曹晓庆张文证侯灿明谭昊存胡非
Owner GUANGZHOU FEIXUE MATERIAL TECH
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