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A kind of low-refractive high-viscosity friction silicon dioxide and its preparation method

A silicon dioxide, high viscosity technology, applied in the direction of silicon dioxide, silicon oxide, cosmetic preparations, etc., can solve the problems of low transparency, low powder viscosity, no thickening effect, etc., to improve transparency and production costs The effect of reducing and simplifying the formula and production process

Active Publication Date: 2019-03-29
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 problems that the existing friction-type silica for toothpaste has low transparency under low refractive index, and the powder has low viscosity and no thickening effect, the present invention firstly provides a low-refraction and high-viscosity friction-type silica A preparation method, which can effectively improve the transparency of silicon dioxide at a low refractive index to over 90%, and increase the viscosity of the powder at the same time, so that it has toothpaste thickening properties

Method used

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  • A kind of low-refractive high-viscosity friction silicon dioxide and its preparation method
  • A kind of low-refractive high-viscosity friction silicon dioxide and its preparation method
  • A kind of low-refractive high-viscosity friction silicon dioxide and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1. Low-refractive high-viscosity frictional silica of the present invention and its preparation

[0028] S1. Inject the water glass solution A0.8m with a concentration of 0.8M and a modulus of 2.0 into the reaction tank 3 , raise the temperature to 70°C, turn on the stirring, control the stirring speed to 30Hz, at 1.5m 3 The flow rate of / h is dripped the sulfuric acid solution A that concentration is 3M, stops adding acid when pH value is 10, makes thickening type silica sol solution;

[0029] S2. Inject 10m of sodium sulfate solution with a mass percentage concentration of 10.0% into the thickened silica sol solution. 3 , while slowly adding 1 kg of carboxymethyl cellulose, and raising the temperature to 50°C;

[0030] S3, at 14.0m 3 The water glass solution B8m with a concentration of 1.5M and a modulus of 2.0 is added dropwise at a flow rate of / h 3 , at the same time with 2.5 ~ 3.0m 3 The flow rate of / h drips the sulfuric acid solution B with a concen...

Embodiment 2

[0032] Example 2. The low-refractive high-viscosity frictional silica of the present invention and its preparation

[0033] S1. Inject the water glass solution A1.0m with a concentration of 1.0M and a modulus of 2.3 into the reaction tank 3 , raise the temperature to 80°C, turn on the stirring, control the stirring speed to 40Hz, at 2.0m 3The flow rate of / h is dripped the sulfuric acid solution A that concentration is 4M, stops adding acid when pH value is 11, makes thickening type silica sol solution;

[0034] S2. Inject 12m of sodium sulfate solution with a mass percentage concentration of 12.0% into the thickened silica sol solution. 3 , while slowly adding 2 kg of carboxymethyl cellulose and raising the temperature to 60°C;

[0035] S3, at 14.5m 3 Add water glass solution B10m with a concentration of 2.0M and a modulus of 2.3 at a flow rate of / h 3 , at the same time with 2.5 ~ 3.0m 3 The flow rate of / h drips the sulfuric acid solution B with a concentration of 10.0...

Embodiment 3

[0037] Example 3. Low-refractive high-viscosity frictional silica of the present invention and its preparation

[0038] S1. Inject the water glass solution A0.9m with a concentration of 0.9M and a modulus of 2.1 into the reaction tank 3 , heat up to 75°C, turn on the stirring, control the stirring speed to 35Hz, at 2.0m 3 Add the sulfuric acid solution A with a concentration of 3.5M dropwise at a flow rate of / h, stop adding acid when the pH value is 10, and obtain a thickened silica sol solution;

[0039] S2. Inject 11m of sodium sulfate solution with a mass percentage concentration of 12.0% into the thickened silica sol solution 3 , while slowly adding 1.5kg of carboxymethyl cellulose, and raising the temperature to 55°C;

[0040] S3, at 14.0m 3 Add water glass solution B9m with a concentration of 1.8M and a modulus of 2.1 at a flow rate of / h 3 , at the same time with 2.5 ~ 3.0m 3 The flow rate of / h drips the sulfuric acid solution B with a concentration of 9.0M to ca...

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Abstract

Provided are a method for preparing a low-refraction and high-viscosity friction type silicon dioxide and the silicon dioxide obtained thereby. The method comprises the following steps: S1, injecting water glass A with a modulus of 2.0-2.3 into a reaction tank, heating, stirring, dropwise adding sulfuric acid A, stopping adding the acid when the pH value is 10-11, so as to obtain a thickened silica sol; S2, injecting a sodium sulfate solution, and meanwhile, adding carboxymethyl cellulose, and heating; S3, dropwise adding water glass B with a modulus of 2.0-2.3 and sulfuric acid B at the same time, controlling the pH value to be 10.5-11.5, and after completion of dropwise adding water glass B, continously dropwise adding the acid until the pH value is 4.0-5.0, stopping adding the acid, stirring and aging; S4, press-filtering, washing, drying, crushing silicon dioxide to produce a product. The method is simple, easy to operate and stable, the prepared silicon dioxide has multiple characteristics such as low refractive index, high transparency, clean friction and thickening, and can be applied to transparent toothpaste without needing to compound the thickening silicon dioxide, thereby simplifying the toothpaste production process and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a low-refractive high-viscosity frictional silicon dioxide and a preparation method thereof. Background technique [0002] Silica is widely used as toothpaste because of 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 toothpaste raw materials, and high fluorine compatibility. abrasives and thickeners. With the development of society and the change of consumption concept, consumers are more and more fond of transparent toothpaste, and many of them are added with special-shaped particles, color-changing particles, etc., which have become the characteristic products of toothpaste companies. [0003] To prepare a transparent toothpaste, the refractive index of the liquid phase system and the solid phase system in the tooth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12A61K8/25A61Q11/00
CPCA61K8/25A61K2800/28A61Q11/00C01B33/12
Inventor 胡非任振雪林英光侯灿明张梦梅
Owner GUANGZHOU FEIXUE MATERIAL TECH
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