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Preparation method of silicon dioxide of toothpaste with low viscosity and high oil absorption value

A silicon dioxide, high oil absorption technology, applied in chemical instruments and methods, cosmetic preparations, cosmetic preparations, etc., can solve the problems of toothpaste viscosity post-expansion, high powder viscosity, etc., to reduce viscosity and production cost. Low effect, simple preparation method

Active Publication Date: 2018-09-11
GUANGZHOU FEIXUE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that the viscosity of the powder in the existing silica for toothpaste is high, resulting in obvious swelling of toothpaste viscosity, the present invention provides a method for preparing silica for toothpaste with low viscosity and high oil absorption value. Simple and stable, it can effectively reduce the viscosity of silica powder at 1500-2500cP, while maintaining the oil absorption value at 290-350g / 100g. When used in toothpaste, it can significantly reduce the tendency of toothpaste viscosity to increase, which is beneficial to toothpaste storage

Method used

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  • Preparation method of silicon dioxide of toothpaste with low viscosity and high oil absorption value

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, the preparation method of silicon dioxide for toothpaste with low viscosity and high oil absorption value of the present invention

[0026] S1. After liquefying solid sodium silicate with a modulus of 2.5 at high temperature, add water to prepare a sodium silicate solution with a concentration of 3.5M, and set aside;

[0027] S2, add water 12m to the reactor 3 and sodium silicate solution 3m 3 , heated to 75°C, add sulfuric acid solution dropwise under stirring, control the dropwise addition time for 10 minutes, add dropwise until the pH is 9, stop adding acid, and stir for 10 minutes;

[0028] S3. Continue heating to 85°C, and add 8.5m sodium silicate solution dropwise while stirring. 3 and sulfuric acid solution, keep the pH of the process at 9, control the dropwise addition of the sodium silicate solution within 40 minutes, continue to drop the sulfuric acid solution until the pH of the reaction end point is 3.5, stop adding acid, age for 10 minutes, ...

Embodiment 2

[0032] Embodiment 2, the preparation method of silicon dioxide for toothpaste with low viscosity and high oil absorption value of the present invention

[0033] S1. After liquefying the solid sodium silicate with a modulus of 2.8 at high temperature, add water to prepare a sodium silicate solution with a concentration of 4.5M, and set aside;

[0034] S2, add water 14m in the reactor 3 and sodium silicate solution 3m 3 , heated to 80°C, add sulfuric acid solution dropwise under stirring, control the dropping time for 30min, dropwise add until the pH is 10, stop adding acid, and stir for 10min;

[0035] S3. Continue heating to 85°C, and add 10m sodium silicate solution dropwise while stirring. 3 and sulfuric acid solution, keep the pH of the process at 10, control the dropwise addition of the sodium silicate solution within 60min, continue to dropwise add the sulfuric acid solution until the pH of the reaction end point is 4.0, stop adding acid, age for 30min, press filter, an...

Embodiment 3

[0039] Embodiment 3, the preparation method of silicon dioxide for toothpaste with low viscosity and high oil absorption value of the present invention

[0040] S1. After liquefying the solid sodium silicate with a modulus of 2.6 at high temperature, add water to prepare a sodium silicate solution with a concentration of 4.0M, and set aside;

[0041] S2, add water 13m in the reactor3 and sodium silicate solution 3m 3 , heated to 75°C, add sulfuric acid solution dropwise under stirring, control the dropwise adding time to 20min, dropwise add until the pH is 10, stop adding acid, and stir for 10min;

[0042] S3. Continue heating to 85°C, and add 9m sodium silicate solution dropwise while stirring. 3 and sulfuric acid solution, keep the pH of the process at 9, control the dropwise addition of the sodium silicate solution within 50 minutes, continue to drop the sulfuric acid solution until the pH of the reaction end point is 3.5, stop adding acid, age for 20 minutes, press filter...

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Abstract

The invention belongs to the technical field of silicon dioxide, in particular to a preparation method of silicon dioxide of toothpaste with low viscosity and high oil absorption value. The preparation method comprises S1, a sodium silicate solution is allocated; S2, water and the sodium silicate solution are added into a reaction kettle and heated to the temperature of 75-80 DEG C, sulphuric acidis added dropwise while stirring is conducted until the pH value is 9-10, and the addition of the sulphuric acid is ceased; S3, the temperature is increased, the sodium silicate solution and the sulphuric acid are added dropwise simultaneously while stirring is conducted, the pH value during the process is maintained at 9-10, the sulphuric acid is continuously added until the pH value is 3.5-4.0after the dropwise adding of the sodium silicate solution is completed, sulphuric acid addition is ceased, and ageing, pressing filtering and washing are conducted to obtain initial products; S4, theinitial products are placed into a pulp beating tank, glycerol is added, beating is conducted after soaking, and pulverizing is conducted by using an airflow pulverizer after spraying drying is conducted to obtain the silicon dioxide of the toothpaste with low viscosity and high oil absorption value. The method is simple, the process is stable, the production cost is low, prepared silicon dioxidepowder is low in viscosity and high in oil absorption value, and the problem of the post growth of toothpaste viscosity can be better solved after the silicon dioxide is applied to the toothpaste.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a method for preparing silicon dioxide for toothpaste with low viscosity and high oil absorption value. Background technique [0002] Due to its 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, silicon dioxide replaces calcium carbonate and other raw materials As an abrasive and thickener in toothpaste. At present, silica for toothpaste on the market is mainly prepared by precipitation method. When the oil absorption value and water absorption of silica are high, the viscosity of the powder will increase and the dispersion performance will decrease. If it is used in toothpaste Among them, during the storage period, the viscosity of the toothpaste will increase as...

Claims

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Application Information

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IPC IPC(8): C01B33/193A61K8/25A61Q11/00
CPCA61K8/25A61Q11/00C01B33/193C01P2006/19C01P2006/22
Inventor 李丽峰任振雪林英光胡非庹文喜
Owner GUANGZHOU FEIXUE MATERIAL TECH
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