阅读说明：本技术 一种植物精华美白防晒护肤霜及其制备方法 (Plant essence whitening sunscreen cream and preparation method thereof ) 是由 刘彪彪 于 2021-01-14 设计创作，主要内容包括：本发明公开了一种植物精华美白防晒护肤霜,其原料中的防晒活性成分为复方植物提取物,用量为1-5%。所述复方植物提取物为小米草和银杏叶按照质量比1：3-5的组合物用低浓度乙醇提取得到。本发明所采用小米草和银杏叶的复方植物提取物作为防晒活性成分,在吸收紫外线方面取得了协同增效作用,避免使用化学防晒剂,从而提高了长期使用化妆品的安全性。(The invention discloses a plant essence whitening sunscreen cream, wherein a sunscreen active component in raw materials of the plant essence whitening sunscreen cream is a compound plant extract, and the dosage of the sunscreen active component is 1-5%. The compound plant extract is prepared from eyebright and ginkgo leaves according to a mass ratio of 1: 3-5 is obtained by extracting with low concentration ethanol. The compound plant extracts of the eyebright and the ginkgo leaves are used as sunscreen active ingredients, so that a synergistic effect is achieved in the aspect of absorbing ultraviolet rays, and a chemical sunscreen agent is avoided, so that the safety of the cosmetics used for a long time is improved.)

1. The plant essence whitening sunscreen skin cream is characterized by being prepared from the following raw materials in percentage by weight: 1-5% of compound plant extract, 3-10% of butanediol dicaprylic acid/dicaprate, 3-5% of glycerol stearate, 1-5% of caprylic/capric triglyceride, 2-5% of C12-15 alcohol benzoate, 2-5% of polyglycerol-2 dipolyhydroxystearate, 1-3% of coco glucoside, 1-3% of cetostearyl alcohol, 2-5% of xanthan gum, 1-2% of bisabolol, 0.1-0.5% of phenoxyethanol, 0.05-0.15% of EDTA disodium and the balance of deionized water; the compound plant extract is prepared from eyebright and ginkgo leaves according to a mass ratio of 1: 3-5 is obtained by extracting with low concentration ethanol.

2. The plant essence whitening sunscreen cream according to claim 1, wherein the preparation method of the compound plant extract comprises the following steps: weighing the eyebright and the ginkgo leaves according to the mass ratio, mixing and crushing, adding 5-10 times of 10-30% ethanol solution by volume, soaking for 1-3 hours, heating and refluxing for 2-3 times, wherein the extraction time is 1-2 hours each time, combining the extracting solutions, filtering, recovering ethanol from the filtrate, concentrating into an extract, and finally vacuum drying into powder.

3. The preparation method of the plant essence whitening sunscreen cream according to claim 1 or 2 comprises the following steps:

(1) weighing butanediol dicaprylic acid/dicaprate, glyceryl stearate, caprylic acid/capric acid triglyceride, C12-15 alcohol benzoate, polyglycerol-2 dipolyhydroxystearate, coco glucoside, cetostearyl alcohol and bisabolol, adding into an oil phase pot, heating to 85 + -2 deg.C, and stirring for dissolving uniformly;

(2) weighing deionized water, glycerol, EDTA disodium and xanthan gum, uniformly mixing, adding into a water phase pot, heating to 85 +/-2 ℃, and uniformly stirring and dissolving;

(3) pumping the raw materials in the water phase pot and the oil phase pot into a reaction pot in sequence, and homogenizing and emulsifying;

(4) cooling to 40 deg.C, adding compound plant extract and phenoxyethanol, and stirring.

Technical Field

The invention relates to the field of daily cosmetics, in particular to a plant essence whitening sunscreen cream and a preparation method thereof.

Background

The ozone layer is distributed in the stratosphere of 10 km to 50 km and is a natural protective barrier of the earth. Due to the protection of the atmospheric ozone layer, 99% of the ultraviolet radiation in the sunlight striking the earth's surface is blocked, protecting humans from the strong ultraviolet rays. However, since the first reports of south-pole ozone holes in 1985, the annual reduction in atmospheric stratospheric ozone, resulting in increased uv radiation flux in sunlight, has become one of the global environmental concerns of today.

Ultraviolet rays are in the range of 200nm to 400nm in the solar spectrum, and account for about 6.1% of sunlight. Ultraviolet light is generally divided into three regions, depending on the wavelength. And a C region: short-wave ultraviolet ray 200nm-280 nm; and a B region: medium-wave ultraviolet light of 280nm-320 nm; and a region A: the long-wave ultraviolet ray is 320nm-400 nm. Short-wave ultraviolet rays in sunlight are basically absorbed by the atmospheric ozone layer due to the short wavelength and cannot reach the ground. The main physiological actions on human skin are ultraviolet rays in the B region and the A region. The majority of wave ultraviolet rays in the B region are absorbed by the epidermis, a small amount of wave ultraviolet rays penetrate the dermis, and the irradiated part generates an acute erythema effect. Ultraviolet radiation in the area A accounts for 98% of total energy of the ultraviolet, most of the ultraviolet radiation penetrates through dermis, a small amount of the ultraviolet radiation penetrates through subcutaneous tissues under the dermis, the radiation penetration capacity is far greater than that of ultraviolet radiation in the area B, the ultraviolet radiation is accumulated after long-term irradiation, acute red-ban effect is easily caused on the skin to cause serious damage, melanocyte hyperfunction is promoted, a large amount of melanin is produced, and finally the skin is blackened.

With the increasing awareness of people on the protection of ultraviolet rays, the demand of the sunscreen cosmetic market is increasing year by year. The sun protection factor in sunscreens is increasing and the amount of various sunscreens used is also increasing. Sunscreens are key components of sunscreen cosmetics, and currently, sunscreens on the market are mainly classified into physical uv screening agents and chemical uv absorbers. Physical sunscreen agents have no irritation to skin, but have poor absorption, transparency and breathability, and are used for preparing sunscreen cosmetics, and the use comfort of the product needs to be improved. Chemical sunscreens present a safety hazard to the skin and may cause allergic and irritant reactions to sensitive skin. How to increase the efficacy of the active ingredients of the sunscreen agent to the maximum, reduce and reach the concentration required by sunscreen protection, ensure the effectiveness of sunscreen products and improve the safety of the products is one of the main topics of current research and development trends in the field in the future. Therefore, the development of the skin care product taking the natural plant extract as the main sunscreen active ingredient has wide application prospect.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a sunscreen cream taking natural plant extracts as main functional components and a preparation method thereof. The invention is realized by the following technical scheme:

a plant essence whitening sunscreen cream is prepared from the following raw materials in percentage by weight: 1-5% of compound plant extract, 3-10% of butanediol dicaprylic acid/dicaprate, 3-5% of glycerol stearate, 1-5% of caprylic/capric triglyceride, 2-5% of C12-15 alcohol benzoate, 2-5% of polyglycerol-2 dipolyhydroxystearate, 1-3% of coco glucoside, 1-3% of cetostearyl alcohol, 2-5% of xanthan gum, 1-2% of bisabolol, 0.1-0.5% of phenoxyethanol, 0.05-0.15% of disodium EDTA, and the balance of deionized water.

Preferably, the compound plant extract is a mixture of eyebright and ginkgo leaves according to a mass ratio of 1: 3-5 is obtained by extracting with low concentration ethanol, wherein the Euphrasia is dried whole plant of Euphrasia fruticosa of Euphrasia of Scrophulariaceae; folium Ginkgo is dry leaf of Ginkgo biloba of Ginkgoaceae.

Preferably, the preparation method of the compound plant extract comprises the following steps: weighing the eyebright and the ginkgo leaves according to the mass ratio, mixing and crushing, adding 5-10 times of 10-30% ethanol solution by volume, soaking for 1-3 hours, heating and refluxing for 2-3 times, wherein the extraction time is 1-2 hours each time, combining the extracting solutions, filtering, recovering ethanol from the filtrate, concentrating into an extract, and finally vacuum drying into powder.

The invention also provides a preparation method of the plant essence whitening sunscreen cream, which comprises the following steps:

(1) weighing butanediol dicaprylic acid/dicaprate, glyceryl stearate, caprylic acid/capric acid triglyceride, C12-15 alcohol benzoate, polyglycerol-2 dipolyhydroxystearate, coco glucoside, cetostearyl alcohol and bisabolol, adding into an oil phase pot, heating to 85 + -2 deg.C, and stirring for dissolving uniformly;

(2) weighing deionized water, glycerol, EDTA disodium and xanthan gum, uniformly mixing, adding into a water phase pot, heating to 85 +/-2 ℃, and uniformly stirring and dissolving;

(3) pumping the raw materials in the water phase pot and the oil phase pot into a reaction pot in sequence, and homogenizing and emulsifying;

(4) cooling to 40 deg.C, adding compound plant extract and phenoxyethanol, and stirring.

Compared with the prior art, the invention has the beneficial effects that: the compound plant extracts of the eyebright and the ginkgo leaves are used as sunscreen active ingredients, so that a synergistic effect is achieved in the aspect of absorbing ultraviolet rays, and a chemical sunscreen agent is avoided, so that the safety of the cosmetics used for a long time is improved.

Detailed Description

For a further understanding of the invention, preferred embodiments of the invention are described below with reference to the following examples.

Example 1:

a plant essence whitening sunscreen cream is prepared from the following raw materials in percentage by weight: 3% of compound plant extract, 5% of butanediol dicaprylate/dicaprate, 5% of glycerol, 3% of glycerol stearate, 2% of caprylic/capric triglyceride, 3% of C12-15 alcohol benzoate, 2% of polyglycerol-2 dipolyhydroxystearate, 1% of coco glucoside, 2% of cetostearyl alcohol, 3% of xanthan gum, 1% of bisabolol, 0.2% of phenoxyethanol, 0.1% of disodium EDTA and the balance of deionized water;

the preparation method of the compound plant extract comprises the following steps: according to the mass ratio of 1: 3 weighing the eyebright and the ginkgo leaves, mixing and crushing the mixture, adding 5 times of 20 percent ethanol solution by volume, soaking the mixture for 2 hours, heating and refluxing the mixture for 3 times, wherein the extraction time is 1 hour each time, combining the extracting solutions, filtering the extracting solutions, concentrating the filtrate into extract after recovering the ethanol, and finally drying the extract in vacuum to obtain powder.

Wherein the Euphrasia is dried whole plant of Euphrasia fruticosa of Euphrasia of Scrophulariaceae; folium Ginkgo is dry leaf of Ginkgo biloba of Ginkgoaceae.

The preparation method of the plant essence whitening sunscreen cream comprises the following steps:

(1) weighing butanediol dicaprylic acid/dicaprate, glyceryl stearate, caprylic acid/capric acid triglyceride, C12-15 alcohol benzoate, polyglycerol-2 dipolyhydroxystearate, coco glucoside, cetostearyl alcohol and bisabolol, adding into an oil phase pot, heating to 85 deg.C, stirring and melting uniformly;

(2) weighing deionized water, glycerol, EDTA disodium and xanthan gum, uniformly mixing, adding into a water phase pot, heating to 85 ℃, and uniformly stirring and dissolving;

(3) pumping the raw materials in the water phase pot and the oil phase pot into a reaction pot in sequence, and homogenizing and emulsifying;

(4) cooling to 40 deg.C, adding compound plant extract and phenoxyethanol, and stirring.

Comparative example 1:

the plant essence whitening sunscreen cream is different from the skin cream in the embodiment 1 in that the compound plant extract is replaced by the eyebright extract, and the preparation method of the eyebright extract is the same as that of the compound plant extract.

Comparative example 2:

the plant essence whitening sunscreen cream is different from the embodiment 1 in that a compound plant extract is replaced by a ginkgo leaf extract, and the preparation method of the ginkgo leaf extract is the same as that of the compound plant extract.

Comparative example 3:

the plant essence whitening sunscreen cream is different from the embodiment 1 in that the compound plant extract is prepared from the following raw materials in a mass ratio of 1: 1 of eyebright and ginkgo leaves.

Comparative example 4:

the plant essence whitening sunscreen cream is different from the embodiment 1 in that the compound plant extract is prepared from the following raw materials in a mass ratio of 1: 1, wherein the sea buckthorn is dried mature fruit of sea buckthorn belonging to elaeagnus pungens family.

Comparative example 5:

the plant essence whitening sunscreen cream is different from the embodiment 1 in that the compound plant extract is prepared from the following raw materials in a mass ratio of 1: 1, eyebright and licorice root, wherein the licorice root is the dried root of Glycyrrhiza glabra of Leguminosae.

Comparative example 6:

the plant essence whitening sunscreen cream is different from the embodiment 1 in that the compound plant extract is prepared from the following raw materials in a mass ratio of 1: 1, wherein the scutellaria baicalensis is the dried root of scutellaria baicalensis of the family labiatae.

The test is carried out by adopting an ultraviolet spectrophotometry, and the sample to be tested is the sunscreen cream prepared in the example 1 and the comparative examples 1-6. The test method refers to the content recorded in "evaluation of cosmetic safety and effectiveness" (red bayberry, plum loyd army, foucault, chemical industry press, 2016, 3 month, 1 st edition), and specifically includes the following steps:

(1) the 3M medical permeable adhesive tape is cut into a size of 1cm multiplied by 4cm and is stuck on the light-transmitting side surface of the quartz cuvette.

(2) And (3) switching on a power supply, preheating an ultraviolet spectrophotometer, and setting the detection wavelengths of the UVB region to be 285nm, 290nm, 295nm, 300nm, 305nm, 310nm, 315nm and 320 nm.

(3) And placing the quartz cuvette pasted with the adhesive tape in a sample light path and a reference light path, and adjusting the zero point of the instrument.

(4) 8mg of a sample to be measured is accurately weighed, and the sample is uniformly coated on a quartz cuvette 3M adhesive tape. Five replicates were prepared in the same way.

(5) And (3) placing the prepared sample cuvette in a drying oven at 35 ℃ and drying for 30 minutes.

(6) And placing the sample cuvette to be measured in a sample light path, placing the other quartz cuvette attached with the adhesive tape in a reference light path, respectively measuring the ultraviolet absorbance values of the set wavelengths in the UVB region, and then taking the arithmetic mean of the measured values.

(7) The five parallel samples are measured in sequence, the mean value of the five samples is obtained by the method, and the arithmetic mean of the mean values of the five samples is calculated, so that the absorbance of the test sample is obtained.

Evaluation criteria: the absorbance value is less than 1.0 +/-0.1, which indicates that the sample has no sun-proof effect; the absorbance value =1.0 ± 0.1, which indicates that the sample has low-grade sun-screening effect and is suitable for winter, spring, autumn, morning and evening and rainy days; an absorbance value of >1.0 and <2.0 ± 0.2, indicating that the sample has a medium sunscreen effect, suitable for medium intensity solar irradiation; the absorbance value is more than 2.0, which shows that the sample has high sunscreen effect and is suitable for summer illumination or outdoor activities, travels and the like. Therefore, the larger the absorbance value is, the better the protection effect on UVB is.

The test results are shown in Table 1.

TABLE 1 Absorbance measurement results

As can be seen from Table 1, the sunscreen cream of the embodiment 1 of the invention has excellent UVB ultraviolet absorbance and good sunscreen effect, and is suitable for summer illumination or outdoor activities, traveling and the like. Meanwhile, as can be seen from the absorbance values of example 1 and comparative examples 1 to 2, the mass ratio of the plant extract to the plant extract is 1: 3, the extract obtained by using the eyebright and the ginkgo leaf as the plant raw materials has obviously higher UVB ultraviolet absorption effect than the extract obtained by using the eyebright or the ginkgo leaf as the plant raw materials. Therefore, the compound plant extracts of the eyebright and the ginkgo leaves are adopted as the sunscreen active ingredients, and the synergistic effect is achieved in the aspect of absorbing ultraviolet rays. As can be seen from the absorbance values of example 1 and comparative example 3, the weight ratio of eyebright to ginkgo leaf is 1: 1, the UVB ultraviolet light absorption effect is obviously reduced, which indicates that the synergistic effect can not reach the best when the mass ratio of the eyebright and the ginkgo leaves is not in the mass ratio range of the invention. As can be seen from the absorbance values of comparative examples 3-6, when the eyebright and another plant material are compounded according to equal mass ratio, the compounding effect with ginkgo leaf is better than that of sea buckthorn, licorice root and scutellaria root.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and those skilled in the art should not make any insubstantial changes and substitutions based on the present invention.