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Preparation method of modified titanium dioxide

A technology of titanium dioxide and titanium dioxide slurry, applied in chemical instruments and methods, skin care preparations, medical preparations containing active ingredients, etc., can solve the problems of large oil absorption, strong hydrophilicity, easy agglomeration, photocatalytic activity, etc. problems, to achieve the effect of improving performance, simple reaction steps, and low modification cost

Pending Publication Date: 2022-05-27
集美精化科技(广西)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unmodified nano-scale titanium dioxide particles have disadvantages such as strong hydrophilicity, large oil absorption, easy agglomeration and strong photocatalytic activity, so they are limited in the application of cosmetics.

Method used

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  • Preparation method of modified titanium dioxide
  • Preparation method of modified titanium dioxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present embodiment provides a kind of modified titanium dioxide, and its specific preparation method is as follows:

[0023] S1: take a certain amount of titanium dioxide and add it to a 75% n-butanol aqueous solution for ultrasonication, the ultrasonic conditions are 50-70kHZ, the intensity is 200-250W / L, and the time is 20-30min to prepare titanium dioxide slurry;

[0024] S2: adjust the pH of the above titanium dioxide slurry to 8-9, heat the temperature to 60° C., add 1% by mass of titanium dioxide, add stearic acid, and perform a modification under stirring, and the reaction time is 4-5h.

[0025] S3: heat the titanium dioxide slurry prepared in step S2 to 70°C, adjust the pH value to 3, take 1% of the mass of titanium dioxide and add silane coupling agent for secondary modification under stirring, and the reaction time is 5-6h .

[0026] S4: After the secondary modification, carry out suction filtration while still hot and carry out multiple washings. The was...

Embodiment 2

[0028] The present embodiment provides a kind of modified titanium dioxide, and its specific preparation method is as follows:

[0029] S1: take a certain amount of titanium dioxide and add it to a 75% ethanol aqueous solution for ultrasonication, the ultrasonic conditions are 50-65kHZ, the intensity is 200-300W / L, and the time is 30-50min to prepare titanium dioxide slurry;

[0030] S2: adjust the pH of the above-mentioned titanium dioxide slurry to 9-10, and heat the temperature to 60 °C, add 2% by mass of titanium dioxide and add stearic acid, and carry out a modification under stirring state, and the reaction time is 4-5h.

[0031] S3: heat the titanium dioxide slurry prepared in step S2 to 80°C, adjust the pH value to 3-4, take 2% of the mass of titanium dioxide and add silane coupling agent for secondary modification under stirring, and the reaction time is 8h .

[0032] S4: After the secondary modification, carry out suction filtration while still hot and carry out mul...

Embodiment 3

[0034] The present embodiment provides a kind of modified titanium dioxide, and its specific preparation method is as follows:

[0035] S1: take a certain amount of titanium dioxide and add it to a 75% ethanol aqueous solution for ultrasonication, the ultrasonic conditions are 50-65kHZ, the intensity is 200-250W / L, and the time is 45-50min to prepare titanium dioxide slurry;

[0036] S2: adjust the pH of the above titanium dioxide slurry to 9-10, and heat up to 60°C, add 5% of the titanium dioxide mass by adding stearic acid, and perform a modification under stirring, and the reaction time is 7h.

[0037] S3: heat the titanium dioxide slurry prepared in step S2 to 85°C, adjust the pH value to 3-4, take 1.6% of the mass of titanium dioxide under stirring, add silane coupling agent for secondary modification, and the reaction time is 7 h.

[0038] S4: After the secondary modification, carry out suction filtration while still hot and carry out multiple washings. The washing proc...

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Abstract

The invention relates to the technical field of titanium dioxide modification, in particular to a preparation method of modified titanium dioxide, which comprises primary modification and secondary modification, and modifiers adopted in the primary modification and the secondary modification are stearic acid and a silane coupling agent respectively. Therefore, the quality and the use experience of the skin care product are improved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide modification, in particular to a preparation method of modified titanium dioxide. Background technique [0002] Titanium dioxide is an important inorganic chemical pigment, the main component is titanium dioxide. Titanium dioxide scientific name is titanium dioxide, titanium dioxide is a very wide range of inorganic chemical raw materials. Titanium dioxide is widely used in coatings, plastics, papermaking, printing inks, chemical fibers, rubber, cosmetics and other fields. Of course, different fields have exclusive titanium dioxide grades. [0003] Our daily cosmetics use cosmetic grade titanium dioxide, which has the characteristics of stable chemical properties, high whiteness, strong covering power, strong weather resistance, and no toxicity. After smearing, it will produce a brightening visual effect on the face, so titanium dioxide is often used in whitening creams, foundations, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/08C09C3/12A61K8/29A61K8/36A61K8/58A61Q17/04A61Q19/00
CPCC09C1/3607C09C1/3669C09C1/3684C09C1/3623C09C1/363C09C1/3692C09C3/003C09C3/006C09C3/041C09C3/043C09C3/08C09C3/12A61K8/29A61K8/361A61K8/585A61Q17/04A61Q19/00A61K2800/612
Inventor 胡远飞黎勤涛黄尚英
Owner 集美精化科技(广西)有限公司
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