External plant extract with whitening and brightening effect, cosmetic and preparation method thereof

Abstract

The invention discloses a plant extract for external use with the effect of whitening and brightening the skin. The plant extract is prepared from the following raw materials with the following proportions by weight: (1) weighing according to the following proportions by weight Take each raw material and mix well; 1-10 parts of peony seeds, 1-10 parts of perilla seeds, 1-10 parts of linseed, 1-10 parts of buckwheat, 1-10 parts of lotus seeds, 1-10 parts of medlar, 1-10 parts of water fly 1-10 parts of thistle, 1-10 parts of licorice; (2) the first extraction: according to the material-liquid ratio of 1:10-100m / m, mix raw materials and solvent 1, extract at 40-90°C for 0.5-2h; ( 3) The second extraction: according to the solid-liquid ratio of 1:10-100m / m, add solvent two, extract at 40-90°C for 0.5-2h; (4) remove solvent one; (5) fine filter until clarification, that is The extract is obtained; the solvent one is a mixture of one or more of ethanol, chloroform and acetone; the solvent two is white oil, hydrogenated polyisobutene, hydrogenated polydecene, caprylic acid / capric triglyceride, iso A mixture of one or more of isostearyl stearate and vegetable oil.

Description

technical field [0001] The invention relates to a plant extract for external use, in particular to a plant extract for external use with the effect of whitening and skin brightening and cosmetics prepared from the plant extract. Background technique [0002] Whitening products have always been the mainstream beauty and skin care products. Most whitening agents selectively inhibit the activity of tyrosinase and cut off the downstream pathway of melanin synthesis to achieve whitening effect. However, the existing whitening agents, such as hydroquinone, have certain cytotoxicity, and local excessive application can lead to the death of melanocytes, manifested as white spots on the skin. How to obtain a natural, safe and efficient plant whitening product is a hotspot of research by those skilled in the art. [0003] Plant extracts have many advantages as cosmetic additives, such as natural ingredients of plant extracts, low irritation and excellent efficacy, etc. Therefore, th...

AI Technical Summary

Problems solved by technology

At present, the main reasons for the difficulties in the application of plant extracts in the field of cosmetics are (1) The extraction efficiency is too low. Due to the characteristics of plant raw materials, the extraction effect is too low and the extraction cost is increased. Therefore, many companies prefer low-cost synthetic chemical raw materials. Replace natural plant raw materials to increase economic benefits

(2) Poor stability of plant raw material extracts

However, complex equipment, high input costs, and high extraction costs limit industrial mass production

And the extract obtained by supercritical extraction generally has poor compatibility with oil, which affects its application in oil-based cosmetics

[0015] There are many defects in the above existing methods. At the same time, due to the limitation of extraction efficiency, problems such as high preparation cost and environmental pollution caused by organic solvent discharge are becoming increasingly prominent.

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