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Efficient sun screen

A high-efficiency, solution-based technology, applied in the direction of medical preparations containing active ingredients, cosmetics, skin care preparations, etc., can solve problems such as blocked hair follicles, questionable safety, and low sunscreen performance

Active Publication Date: 2021-07-06
百特威(上海)化妆品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]That is to say, when zinc oxide is used as the main raw material of physical sunscreen in the prior art, the following technical problems are faced: (1) The size of ZnO is too large, resulting in low sunscreen performance (2) Small ZnO particles have good sun protection performance, but for physical sunscreens, they will cause blockage of human hair follicles, that is, too large ZnO particles are safe, but the performance is too low, and too small ZnO particles have high performance, but are safe sex is debatable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A high-efficiency sunscreen liquid, characterized in that the sunscreen liquid includes

[0046] Trimethylcyclohexyl salicylate 80mg / g;

[0047] Octocrylene 60mg / g;

[0048] Octyl salicylate 50mg / g;

[0049] Butylmethoxydibenzoylmethane 30mg / g;

[0050] 4-Methylbenzylidene camphor 25mg / g;

[0051] PMMA@ZnO core-shell particles 50mg / g.

[0052] The preparation method of PMMA@ZnO is as follows:

[0053] 1) Add 72mg of initiator azobisisobutyronitrile, 2.5g of dispersant polyvinylpyrrolidone, and 0.79ml of crosslinking agent ethylene glycol dimethacrylate into a solvent of 95vol.% acetonitrile / 5vol.% toluene, fully Disperse to obtain a solution.

[0054] 2) Add 3g of methyl methacrylate and 1.5g of acrylamide to the solution obtained in step 1), slowly pass through N2 protection for 30min, and then rise to the reaction temperature of 85°C. After 4 hours of continuous reaction, the experiment is over, and the product is poured out. Vacuum filtration, tetrahydrofuran ...

Embodiment 2

[0060] A high-efficiency sunscreen liquid, characterized in that the sunscreen liquid includes

[0061] Trimethylcyclohexyl salicylate 80mg / g;

[0062] Octocrylene 60mg / g;

[0063] Octyl salicylate 50mg / g;

[0064] Butylmethoxydibenzoylmethane 30mg / g;

[0065] 4-Methylbenzylidene camphor 25mg / g;

[0066] PMMA@ZnO core-shell particles 55mg / g.

[0067] The preparation method of PMMA@ZnO is as follows:

[0068] 1) Add 72mg of initiator azobisisobutyronitrile, 2.5g of dispersant polyvinylpyrrolidone, and 0.79ml of crosslinking agent ethylene glycol dimethacrylate into a solvent of 95vol.% acetonitrile / 5vol.% toluene, fully Disperse to obtain a solution.

[0069] 2) Add 3g of methyl methacrylate and 1.5g of acrylamide to the solution obtained in step 1), slowly pass through N2 protection for 30min, and then rise to the reaction temperature of 85°C. After 4 hours of continuous reaction, the experiment is over, and the product is poured out. Vacuum filtration, tetrahydrofuran ...

Embodiment 3

[0075] A high-efficiency sunscreen liquid, characterized in that the sunscreen liquid includes

[0076] Trimethylcyclohexyl salicylate 80mg / g;

[0077] Octocrylene 60mg / g;

[0078] Octyl salicylate 50mg / g;

[0079] Butylmethoxydibenzoylmethane 30mg / g;

[0080] 4-Methylbenzylidene camphor 25mg / g;

[0081] PMMA@ZnO core-shell particles 60mg / g.

[0082] The preparation method of PMMA@ZnO is as follows:

[0083] 1) Add 72mg of initiator azobisisobutyronitrile, 2.5g of dispersant polyvinylpyrrolidone, and 0.79ml of crosslinking agent ethylene glycol dimethacrylate into a solvent of 95vol.% acetonitrile / 5vol.% toluene, fully Disperse to obtain a solution.

[0084] 2) Add 3g of methyl methacrylate and 1.5g of acrylamide to the solution obtained in step 1), slowly pass through N2 protection for 30min, and then rise to the reaction temperature of 85°C. After 4 hours of continuous reaction, the experiment is over, and the product is poured out. Vacuum filtration, tetrahydrofuran ...

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Abstract

The invention provides an efficient sun screen. A PMMA polymer microsphere containing two groups -CH2-NH2 and -CO-NH2 is prepared to provide an excellent adsorption site for subsequent zinc oxide deposition so as to conveniently form a PMMA polymer microsphere nucleus and a zinc oxide shell, and an inorganic nuclear shell structure can obviously increase the SPF value and the PA value of sun screen cosmetics.

Description

technical field [0001] The invention belongs to the field of cosmetics, and in particular relates to a high-efficiency sunscreen liquid. Background technique [0002] With the pollution of the environment and the destruction of the global atmosphere, more ultraviolet rays, high-energy blue light, and infrared rays irradiate the surface of the earth. All kinds of harmful light have caused certain damage to the human body. People are paying more and more attention to sun protection. In addition to traditional hard sun protection: sun umbrellas, sun protection clothing, sun hats, sun protection glasses, etc.; people's demand for sun protection and skin care products with broad-spectrum and high-efficiency sun protection is also increasing. At present, most of the sunscreens used in sunscreen products on the market are pure chemical sunscreens, pure physical sunscreens or a combination of chemical sunscreens and physical sunscreens. [0003] Traditional chemical sunscreens ar...

Claims

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Application Information

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IPC IPC(8): A61K8/81A61K8/27A61K8/35A61K8/37A61K8/40A61K8/02A61Q17/04A61Q19/02
CPCA61K8/37A61K8/40A61K8/35A61K8/27A61K8/8152A61Q17/04A61Q19/02A61K8/025A61K2800/412A61K2800/621A61K2800/654
Inventor 郑小青
Owner 百特威(上海)化妆品有限公司
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