Method for inhibiting whitening cosmetics from yellowing

A whitening cosmetic and whitening technology, applied in the directions of cosmetics, cosmetic preparations, dressing preparations, etc., can solve the problems of yellowing of products, decrease in the content of whitening active substances, and consumer returns, so as to achieve no yellowing and inhibiting the occurrence of yellowing. Less loss of yellowing and whitening actives

Active Publication Date: 2013-11-13
PROYA COSMETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resorcinol and hydroquinone derivatives are easily oxidized into quinones in water and turn brown, which leads to whitening products usually turning yellow and whitening active substances within 6 months after production. The case of decreased content
The product turns yellow. On the one hand, the content of whitening active substances in the product decreases, which affects the originally expected efficacy. On the other hand, the appearance defects caused by the product’s yellowing directly lead to complaints or even returns from consumers.

Method used

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  • Method for inhibiting whitening cosmetics from yellowing
  • Method for inhibiting whitening cosmetics from yellowing
  • Method for inhibiting whitening cosmetics from yellowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Green transparent whitening water

[0019]

[0020] Preparation:

[0021] 1. Mix all the above ingredients in A1-A7 and heat to 55°C, stir well and cool down to 37°C.

[0022] Add B1-B3 part of the raw materials and stir evenly. The tested water activity is 0.87 and the pH value is 3.3. The product does not turn yellow when stored at room temperature for 3 years, and the content of whitening active substances can maintain 97.5% of the original added amount within three years.

Embodiment 2

[0024] Milky White Opaque Whitening Essence

[0025]

[0026] Preparation:

[0027] 1. Mix all the above ingredients in A1-A15 and heat to 55°C, stir well and cool down to 37°C. 2. Add some raw materials of B1-B2 and stir evenly. The tested water activity is 0.87 and the pH value is 4.7. The product does not turn yellow when stored at room temperature for 3 years, and the content of whitening active substances can maintain 97.8% of the original added amount within three years.

Embodiment 3

[0029] Colorless transparent whitening essence

[0030]

[0031] Preparation:

[0032] 1. Mix all the above ingredients in A1-A12 and heat to 55°C, stir well and cool down to 37°C;

[0033] 2. Add the raw materials of part B1 and stir well;

[0034] 3. Mix some raw materials of C1-C4 in advance, stir well and then add;

[0035] 4. Add the raw materials of D1 and stir evenly to form a transparent and colorless whitening essence. The tested water activity is 0.82, the pH value is 4.7, and the viscosity at room temperature is 1500cps. The product does not turn yellow when stored at room temperature for 3 years, and the content of whitening active substances can maintain 98.6% of the original added amount within three years.

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PUM

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Abstract

The invention relates to a method for inhibiting whitening cosmetics from yellowing. The method is characterized by comprising the steps of: adding an appropriate amount of an ingredient capable of inhibiting moisture activity to a cosmetic formula containing whitening active matters, so as to control the moisture activity of a product to be smaller than 0.87, wherein the ingredient capable of inhibiting moisture activity is one or a mixture or isomers of propylene glycol, dipropylene glycol, butanediol, pentanediol, hexanediol, glycerol, diglycerol, sorbitol, betaine, glucose, trehalose, sucrose, polyethylene glycol-8, polyethylene glycol-32, methyl glucitol polyether-10, methyl glucitol polyether-20, glycerol polyether-26 and poloxamer 184; adding 0.03-0.5wt% of complexing agent; and adding an appropriate amount of pH buffering agent so as to control the pH of the product to be 3.3-4.7. The method disclosed by the invention has the beneficial effect of inhibiting the whitening cosmetics from yellowing; and after the whitening cosmetics prepared by the method disclosed by the invention are stored for three years in cosmetic containers, the appearance of the products does not yellow, and the loss of the whitening active matters is small.

Description

technical field [0001] The invention relates to the technical field of cosmetics preparation, in particular to a method for inhibiting yellowing of whitening cosmetics. Background technique [0002] The formation of melanin in the skin is fundamentally a process in which tyrosine in the skin is gradually catalyzed and oxidized by enzymes to form melanin. In whitening cosmetics, the mechanism of inhibiting melanin production is mainly the use of whitening active ingredients with reducing substances, the purpose of which is to competitively inhibit the oxidation process that produces melanin. At present, it is recognized that the effect is better, and the most widely used are ascorbic acid derivatives, also known as vitamin C derivatives, such as 3-o-ethyl ascorbic acid, ascorbyl glucoside, aminopropanol ascorbyl phosphate, magnesium ascorbyl phosphate, ascorbic acid Sodium phosphate esters, and derivatives of resorcinol products allowed by cosmetic hygienic regulations such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/86A61K8/67A61K8/60A61K8/55A61K8/44A61K8/34A61Q19/02
Inventor 邱玉想蒋丽刚
Owner PROYA COSMETICS
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