Oil phase dispersion sunblocking concentrate of nanometer titania and preparation method thereof

A technology of nano-titanium dioxide and dispersion, which is applied in the direction of cosmetic preparations, skin care preparations, cosmetics, etc., to achieve the effects of low viscosity, uniform dispersion, and favorable production and processing

Inactive Publication Date: 2011-11-02
蒲科
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to provide a kind of nano-titanium dioxide oil-phase dispersion sunscreen concentrate and its preparation method and application for the deficiencies of existing nano-titanium dioxide sunscreen agents. The nano-titanium dioxide oil-phase dispersion The sunscreen concentrate has high solid content and low viscosity, which can make nano-titanium dioxide as a physical sunscreen component more evenly and conveniently added to various cosmetics with sunscreen effects

Method used

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  • Oil phase dispersion sunblocking concentrate of nanometer titania and preparation method thereof
  • Oil phase dispersion sunblocking concentrate of nanometer titania and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 15g polyhydroxystearate, 135g C12~C15 alkyl benzoate (AB, British Croda) and 150g modified nano-titanium dioxide (SHU-103 nano-titanium dioxide produced by Shanghai Shanghui Nano Technology Co., Ltd., Particle size 30 ~ 50nm), and put the polyhydroxystearate at 80 ℃ to make it melt completely; then add the weighed polyhydroxystearate and modified nano-titanium dioxide to the C12~C15 alkyl benzoate, and stir and mix evenly with a high-speed mixer; finally, grind the oily dispersion containing nanoparticles with a ball mill for 1 hour, and filter and separate with a 300-mesh filter to obtain a blue coating gloss white oily dispersion concentrate. The concentrate is uniform and stable, with a solid content of 50% and a dynamic viscosity of 230±10mPa·s (25°C).

Embodiment 2

[0029] Weigh 20g of polyhydroxystearic acid, 115g of C12~C15 alkyl benzoate and 165g of modified nano titanium dioxide (SHU-103 nano titanium dioxide produced by Shanghai Shanghui Nano Technology Co., Ltd., particle size 30~ 50nm), and put the polyhydroxystearic acid at 80°C to make it melt completely; then add the weighed polyhydroxystearic acid and nano-titanium dioxide to the C12~C15 alkyl benzoic acid ester in turn during stirring and use a high-speed mixer to stir and mix evenly; finally, grind the oily dispersion containing nanoparticles for 1 hour with a grinder, and filter and separate with a 300-mesh filter to obtain a white oily dispersion concentrate with blue coating luster. The concentrate is uniform and stable, with a solid content of 55% and a dynamic viscosity of 320±10mPa·s (25°C).

Embodiment 3

[0031] Weigh respectively 15g of polyhydroxystearate, 150g of C12~C15 alkyl benzoate and 135g of modified nano-titanium dioxide (SHU-103 nano-titanium dioxide produced by Shanghai Shanghui Nano Technology Co., Ltd., particle size 30~50nm), and put the polyhydroxystearic acid at 80°C to melt it completely; then add the weighed polyhydroxystearic acid and nano-titanium dioxide to the C12~C15 alkylbenzyl and use a high-speed mixer to stir and mix evenly; finally, grind the oily dispersion containing nanoparticles for 1 hour with a grinder, and filter and separate with a 300-mesh filter to obtain a concentrated white oily dispersion with blue coating luster things. The concentrate is uniform and stable, with a solid content of 45% and a dynamic viscosity of 80±10mPa·s (25°C). The particle size of the nano-titanium dioxide in the dispersion concentrate is as follows figure 1 shown. Depend on figure 1 It can be seen that there are almost no aggregates in the dispersion concentra...

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Abstract

The invention discloses an oil phase dispersion sunblocking concentrate of nanometer titania and a preparation method as well as application thereof. The concentrate of the invention comprises the following materials by weight: (a) 35-60% of nanometer titania; (b) 30-62% of organic solvent which is one or more of dimethyl polysiloxane, cyclopentasiloxane, alkyl benzoate, caprylic triglyceride and capric triglyceride; (c) 1-10% of dispersing accessory which is one or more of polyhydroxystearate, polyhydroxystearic acid and polyglyceryl polysiloxane. Characterized by uniformity and stability, small viscosity, high content of effective components, obvious blocking effect against ultraviolet rays and complete permeability to visible light, the concentrate provided in the invention is beneficial for the production and processing of various sunblocking cosmetics.

Description

technical field [0001] The invention belongs to the field of sunscreen agents, and in particular relates to a sunscreen concentrate of nano-titanium dioxide oil phase dispersion and a preparation method thereof. Background technique [0002] The radiation of ultraviolet rays in the sun has great damage to the skin, and various man-made and non-artificial factors have caused varying degrees of damage to the atmosphere on which human beings live, resulting in an increasing amount of ultraviolet radiation, which seriously threatens the skin. human health. There are two main types of sunscreens: UV absorbers and UV screeners. Among them, ultraviolet absorbers are mainly organic sunscreens. The molecules of such sunscreens can absorb the energy of ultraviolet rays and then release them in the form of heat or light, thereby reducing damage to the skin. Although this type of sunscreen has high transparency to the product and good ultraviolet absorption effect, it is irritating to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/892A61K8/891A61K8/85A61K8/29A61K8/04A61Q17/04
Inventor 蒲科
Owner 蒲科
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