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Aqueous dispersion of aqueous polyurethane-coated sunscreen and preparation method and application thereof

A water-based polyurethane and sunscreen technology, applied in the application of refreshing sunscreen products, in the field of water dispersions of sunscreens, can solve the problems of irritation, inability to use in direct cold formulation, strong skin, etc., and achieves strong coating ability and formulation. Strong applicability and improved skin feel

Active Publication Date: 2019-08-27
WANHUA CHEMICAL (NINGBO) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been reports of using polyurethane to increase the sunscreen effect. Among them, the US published patent US2017 / 0216189A1 discloses the preparation of a solvent-based polyurethane dispersion and its application in anhydrous ethanol sunscreen formulations. The SPF value of sunscreen products Increased from 11.4 to 31.2, but the solvent-borne polyurethane dispersion contains a large amount of solvent (>50wt%), which is strongly irritating to the skin
U.S. published patent US8986661 discloses a sunscreen composition containing water-based polyurethane dispersion. The sunscreen composition made of the water-based polyurethane dispersion can only increase the SPF from about 20 to about 25, and cannot be directly used for cold preparation
At present, there is no report of directly preparing oil-in-water sunscreen with high water resistance and high SPF value by coating sunscreen with water-based polyurethane

Method used

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  • Aqueous dispersion of aqueous polyurethane-coated sunscreen and preparation method and application thereof
  • Aqueous dispersion of aqueous polyurethane-coated sunscreen and preparation method and application thereof

Examples

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Embodiment Construction

[0048] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples.

[0049] The raw material used in embodiment and comparative example:

[0050] IPDI: Isophorone Diisocyanate (Bayer)

[0051] HDI: Hexamethylene diisocyanate (Wanhua Chemical)

[0052] HMDI: 4,4'-Dicyclohexylmethane diisocyanate (Wanhua Chemical)

[0053] CMA654: Poly(Neopentyl Glycol Adipate) 1,6-Hexanediol Diol, Number Average Molecular Weight 1500 (Hua Da Chemical)

[0054] PTMEG2000: polytetrahydrofuran ether glycol (BASF)

[0055] PNA2000: Polyneopentyl adipate diol (Hua Da Chemical)

[0056] DMPA: 2,2-Hydroxymethylpropionic acid (Perstorp)

[0057] DMEA: N,N Dimethylethanolamine (BASF)

[0058] Hydroxyethylethylenediamine (Xilong Chemical)

[0059] Lysine (Aladdin's Reagent)

[0060] Leucine (Aladdin's Reagent)

[0061] 8108: Organic bismuth catalyst (leading in the United States)

[0062] Ethylhexyl Met...

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Abstract

The invention discloses a preparation method of an aqueous dispersion of an aqueous polyurethane-coated sunscreen and a composition of sunscreen cosmetics. By an aqueous polyurethane coating method, an oil-soluble chemical sunscreen can be directly used for preparing oil-in-water sun scream with water repellency and a high SPF value without emulsification. The sunscreen coated with aqueous polyurethane can uniformly form a film on the skin, and greatly relieves the problem of poor water resistance of a conventional oil-in-water sun scream, and the sunscreen coated with aqueous polyurethane canprevent the skin from absorbing the sunscreen, thereby greatly reducing the irritation of the sunscreen and increasing a sun protection factor (SPF value).

Description

technical field [0001] The invention relates to an aqueous dispersion of a water-based polyurethane-coated sunscreen and a preparation method thereof, and also relates to the application of the water-based polyurethane-coated water dispersion of a sunscreen in refreshing sunscreen products. Background technique [0002] Delaying skin aging has long been regarded as one of the most important goals of skin care products. More and more studies have confirmed that sun exposure is an important cause of skin aging, and more and more consumers pay attention to sunscreen products. The wavelength bands that damage the skin in sunlight mainly include UVB radiation (wavelength: 280-320nm) and UVA radiation (wavelength: 320-400nm). The sunscreen agent in sunscreen products corresponds to UVB and UVA radiation protection, and the sunscreen effect is measured by SPF value and PA value respectively. [0003] Traditional sunscreen products mainly achieve sunscreen effect by adding sunscre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/87A61K8/40A61K8/04A61Q17/04A61Q19/00
CPCA61K8/87A61K8/40A61K8/04A61Q17/04A61Q19/00A61K2800/56
Inventor 纪晓晓胡海东纪学顺许诺贾海东孙家宽
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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