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Nanometer dispersed UV-resisting sunblock lotion and its prepn process

An anti-ultraviolet and dispersion technology is applied in the fields of nano titanium dioxide dispersion and its preparation, nano anti-ultraviolet dispersion sunscreen agent and its preparation, which can solve the problems of destroying the stable state of the dispersion, neglecting and changing the surface properties of ultrafine particles, etc. , to achieve the effect of excellent transparency, good shielding and low viscosity

Inactive Publication Date: 2006-03-01
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, some influencing factors are also neglected to varying degrees in these patents
For inorganic metal compounds, the smaller the particle size, the larger the specific surface area and the higher the surface energy, and the nano-sized particles used in some patents are easy to re-aggregate, destroying the stable state of the dispersion
Some people propose to coat the surface of ultrafine particles to change the surface properties of ultrafine particles, but it is necessary to choose a dispersion solvent corresponding to the properties of the surface coating layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Add 20g dispersant tripolyglycerol disisostearate and 10g polyglycerol-b-tetraisostearate to 220g dispersion medium isopropyl palmitate, stir 10 minutes with the stirring speed of 600rpm in the mixer, make dispersion The agent is uniformly dispersed to obtain a homogeneous mixture; then 200g of composite anti-ultraviolet nano-titanium dioxide powder prepared in advance, with an average particle size of 50um, is slowly added to the above homogeneous mixture, and dispersed in a high-speed disperser, and the high-speed disperser The rotating speed is 1000rpm, and the dispersion time is 30 minutes to obtain a nano-dispersed slurry; then the nano-dispersed slurry is placed in a ball mill, and the grinding medium in the grinder is a zirconia ball, and the amount of input is 1 kg. The particle size is 0.4~0.6mm, and the density is 5g / cm 3 The ball mill grinds at a speed of 3000rpm for 30 minutes at a high speed, and at the same time controls the grinding temperature between 50 ...

Embodiment 2

[0040] In 240g dispersion medium isopropyl myristate, add 15g dispersant cetyl alcohol phosphate and 5g cetearyl ether, stir 10 minutes with the stirring speed of 800rpm in mixer, dispersant is dispersed evenly, obtains a A homogeneous mixture; then 220g of composite anti-ultraviolet nano-titanium dioxide powder prepared in advance, whose average particle size is 50um, is slowly added to the above-mentioned homogeneous mixture, and dispersed in a high-speed disperser. The speed of the high-speed disperser is 1000rpm. The time is 20 minutes to obtain a nano-dispersion slurry; then the nano-dispersion slurry is placed in a ball mill, the grinding medium in the grinder is zirconia balls, the input amount is 1 kg, and the particle size is 0.4 to 0.6 mm, density 5g / cm 3 The ball mill grinds at a high speed of 2000rpm for 60 minutes, and at the same time controls the grinding temperature between 50 and 70°C through condensed water, and finally filters the ground nano-dispersion thro...

Embodiment 3

[0042] Add 15g dispersing agent glyceryl monostearate / polyoxyethylene stearate in 200g dispersing medium white oil, stir 10 minutes with the stirring speed of 800rpm in mixer, make dispersing agent evenly disperse, obtain a kind of homogeneous mixture; Then 120g of the composite anti-ultraviolet nano-titanium dioxide powder prepared in advance, whose average particle size is 100um, is slowly added to the above-mentioned homogeneous mixture, and dispersed in a high-speed disperser. The speed of the high-speed disperser is 1000rpm, and the dispersion time is 20 minutes. , to obtain a nano-dispersed slurry; then the nano-dispersed slurry is placed in a ball mill, the grinding medium in the grinder is zirconia balls, the amount of input is 1 kg, the particle size is 0.4-0.6mm, and the density is 5g / cm 3 The ball mill grinds at a speed of 3000rpm for 60 minutes at a high speed, and at the same time controls the grinding temperature between 50 and 70°C through condensed water, and f...

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Abstract

The present invention relates to nanometer dispersed UV-resisting sunblock lotion and its preparation process, is especially one kind of nanometer titania dispersed lotion in non-water medium and its preparation process, and belongs to the field of cosmetic product technology. The nanometer dispersed UV-resisting sunblock lotion consists of compound UV-resisting titania powder or coated titania powder, non-water dispersant medium and dispersant in certain weight proportion. The preparation process includes weighing the said components in required proportion, and high speed stirring, high speed dispersion and high speed ball milling for certain time to obtain the nanometer dispersed UV-resisting sunblock lotion. The present invention has high UV shielding effect, and is homogeneous and stable.

Description

technical field [0001] The invention relates to a nano-anti-ultraviolet dispersion liquid sunscreen and a preparation method thereof, in particular to a nano-titanium dioxide dispersion liquid in a non-aqueous medium and a preparation method thereof, which belongs to the technical field of beauty and skin care cosmetic chemicals. Background technique [0002] As we all know, the radiation of ultraviolet rays in the sun has great damage to human skin. In recent years, the atmospheric ozone layer has been destroyed, which has increased the sun's ultraviolet radiation on the ground. Strong ultraviolet radiation will damage the human immune system, accelerate skin aging, and worsen chloasma, freckles, and melanosis, leading to various skin diseases and even skin problems. cancer. [0003] Ultraviolet rays can be divided into the following three types according to the length of wavelength: [0004] (1) UV-C: known as the sterilization area, also known as destructive ultraviolet...

Claims

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Application Information

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IPC IPC(8): A61K8/29A61Q19/04
Inventor 施利毅张大卫方建慧张剑平
Owner SHANGHAI UNIV
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