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Waterborne polyurethane dispersion, preparation method thereof and sunscreen cosmetic composition

A cosmetic composition, water-based polyurethane technology, applied in the field of personal care, can solve problems such as unpleasant odor, unsatisfactory, weak ability to increase SPF value, etc.

Active Publication Date: 2019-12-27
WANHUA CHEM GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN106572964A discloses a preparation of a solvent-based polyurethane dispersion and its application in anhydrous ethanol sunscreen formulations, which can improve the SPF from 11.4 to 31.2, but because the solvent-based polyurethane dispersion contains a large amount of solvent (> 50wt%), so that it has an unpleasant smell, and a large amount of alcohols such as ethanol has a strong irritant to the skin, and the composition formula does not contain water, which limits its use in current water-containing sunscreens
U.S. Patent No. 8,986,661 discloses another sunscreen composition containing water-based polyurethane dispersion. Although the composition has universal applicability, the sunscreen composition made of this water-based polyurethane dispersion can only improve the SPF from about 20 to About 25, its ability to increase the SPF value is weak and cannot meet the needs of the existing market

Method used

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  • Waterborne polyurethane dispersion, preparation method thereof and sunscreen cosmetic composition
  • Waterborne polyurethane dispersion, preparation method thereof and sunscreen cosmetic composition
  • Waterborne polyurethane dispersion, preparation method thereof and sunscreen cosmetic composition

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preparation example Construction

[0110] The formula is shown in Table 1 below, and its preparation method includes the following steps: according to the proportion, homogenize components d and e at 78°C at a speed of 6000r / min for 10 minutes, and homogenize phases a, c and h at room temperature at 500r / min , Add phases d, e and component b to phases a, c, h, homogenize at 6000r / min for 10 minutes, then add components f and g under slow stirring at 500r / min, and stir for 15 minutes.

[0111] See Table 2 for the evaluation results.

[0112] Table 1 embodiment and comparative example raw material mass parts

[0113] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Waterborne Polyurethane Dispersion-1 5 0 0 0 0 0 0 0 0 0 Waterborne Polyurethane Dispersion-2 0 3 0 0 0 0 0 0 0 0 Waterborne Polyurethane Dispersion-3 0 0 8 0 0 0 0 0 0 ...

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Abstract

The invention discloses a waterborne polyurethane dispersion, a preparation method thereof and a sunscreen cosmetic composition. According to the waterborne polyurethane dispersion, a diamine chain extender containing two hydroxyl groups is used for preparing the sunscreen cosmetic composition, so that the waterborne polyurethane dispersion resin has relatively good waterproof performance, good adhesive force on the surface of human skin and a moisture-permeable effect; the sunscreen index (SPF value) can be increased; and the skin feeling can be improved.

Description

technical field [0001] The invention relates to the field of personal care, in particular to an aqueous polyurethane dispersion and a preparation method thereof, and also to a sunscreen cosmetic composition prepared from the aqueous polyurethane dispersion. Background technique [0002] Sun exposure can cause photoaging, causing dark spots, freckles, etc. on the skin. Redness of the skin after sun exposure is medically called "erythema", which is the slightest reaction of the skin to sun exposure. Sun Protection Factor (SPF), abbreviated as SPF, refers to the ratio of the energy required to produce the smallest erythema on the skin protected by sunscreen to the energy required to produce the same degree of erythema on the skin without any protection, simple In other words, it is the time multiple of the skin's resistance to ultraviolet rays. [0003] With the improvement of people's living standards, people are particularly concerned about skin protection, especially Asian...

Claims

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Application Information

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IPC IPC(8): A61K8/87A61Q19/00A61Q17/04C08G18/66C08G18/48C08G18/34C08G18/32
CPCA61K8/87A61Q19/00A61Q17/04C08G18/6692C08G18/4854C08G18/348C08G18/3206C08G18/3228C08G18/3275
Inventor 许诺张洁周操纪晓晓贾海东孙家宽华卫琦
Owner WANHUA CHEM GRP CO LTD
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