CN109350577B

CN109350577B - Skin care composition and application thereof

Info

Publication number: CN109350577B
Application number: CN201811529140.2A
Authority: CN
Inventors: 丘卓秋; 孙娟娟; 赵美贺; 谢水林; 魏坤; 王晓慧
Original assignee: Guangzhou Rui Sen Biotechnology Co ltd
Current assignee: Guangzhou Rui Sen Biotechnology Co ltd
Priority date: 2018-12-13
Filing date: 2018-12-13
Publication date: 2021-09-21
Anticipated expiration: 2038-12-13
Also published as: CN109350577A

Abstract

The invention discloses a skin care composition and application thereof, wherein the skin care composition comprises the following components: phyllanthus emblica fruit extract, Phyllostachys pubescens extract, and Porphyra tenera extract. Experiments show that the phyllanthus emblica fruit extract, the phyllostachys pubescens leaf extract and the laver extract are compounded to generate a synergistic interaction effect in the aspect of oxidation resistance, so that the skin care composition has stronger free radical scavenging capacity. The skin care composition can directly remove excessive free radicals, can strengthen an in-vivo antioxidant system and inhibit the generation of free radicals, has high-efficiency antioxidant effect, good anti-aging effect and very mild property, and is also suitable for sensitive skin. The skin care composition is added into a barrier product to prepare the barrier milk. The isolation emulsion not only has good isolation and sunscreen effects, but also has good effects of resisting oxidation, removing wrinkles and moistening, and overcomes the defects of unsatisfactory isolation effect and single effect of the existing isolation products.

Description

Skin care composition and application thereof

Technical Field

The invention relates to the technical field of cosmetics, in particular to a skin care composition with wrinkle removing, oxidation resisting and moistening effects and application thereof.

Background

The isolation is an important protective layer for isolating damages of radiation, ultraviolet rays, electrical pollution and the like to the skin, is an important step for protecting the skin, is beneficial to make-up of the color makeup, enables the make-up to be more uniform, can prevent the foundation from entering the skin to block pores, and isolates the damage of the color makeup to the skin. If the skin is kept facing a computer for a long time, pigmentation, fine wrinkles and premature senility are easy to generate on the skin if the skin is not properly isolated.

Nowadays, isolation products on the market are full of precious stones, but a few products with good isolation and sunscreen effects are available. Most of the isolation products only have basic isolation effects, but do not have other skin care effects such as anti-aging and skin moistening, and the like, and cannot meet the requirements of consumers.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provide a skin care composition which has multiple effects of wrinkle removal, oxidation resistance, skin moistening, skin care and the like, is natural and safe and is composed of plant extracts, and can increase the skin care effect of an isolation product and improve the sun protection effect of the isolation product when the skin care composition is used in the isolation product.

In order to realize the purpose, the invention adopts the technical scheme that:

a skin care composition comprising the following components: phyllanthus emblica fruit extract, Phyllostachys pubescens extract, and Porphyra tenera extract.

Phyllanthus emblica (Phyllanthus emblica Linn.) is a woody plant of Phyllanthus of Euphorbiaceae, and its fresh fruit is sour, sweet, crisp, slightly astringent, sweet in aftertaste, so it is called Phyllanthus emblica, also called Hougan Zi, an in Luo fruit, niu gan fruit, etc. The fructus Phyllanthi contains various vitamins, microelements, amino acids, organic acids, proteins and saccharides, and also contains a large amount of superoxide dismutase (SOD). SOD is free radical scavenger capable of scavenging free radical O₂(superoxide anion radical), SOD in natural extracts is more easily absorbed by the skin. The emblic extract used in the invention is purchased from Baihabo Co Ltd, Guangzhou, type: emblica (130165).

Phyllostachys nigra (Carr.) Mitford cv.Pubescens) is a monoaxially-scattered evergreen arbor-like bamboo plant belonging to the genus Phyllostachys of the family Gramineae. The moso bamboo is the bamboo species which is long cultivated in China, has the widest area and the most important economic value, and plays an important role in various aspects of clothes, eating, living, walking, watching, using and decorating. The moso bamboo leaves contain abundant nutrient elements such as mineral substances, amino acids and the like, and have the functions of moistening and moisturizing the skin. The moso bamboo leaf extract used in the invention is purchased from Xian Qingzhi biotechnology limited company, and the product number is: QZ-171047.

Porphyra (Porphyra) is a generic name for inter-growing algae in the sea, and is mainly the thallus of Porphyra tenera of the family Cauliaceae, and is purple or brownish green. The thallus Porphyrae extract contains phycobiliprotein and polysaccharide, and has ultraviolet resisting effect. The laver extract used in the present invention was purchased from qianyu biotechnology limited, guangzhou, type: OB-PL 1.

Experiments show that the phyllanthus emblica fruit extract, the phyllostachys pubescens leaf extract and the laver extract are compounded to generate a synergistic interaction effect in the aspects of wrinkle removal and oxidation resistance, so that the skin care composition has stronger free radical scavenging capacity and wrinkle removal effect. The skin care composition can directly remove excessive free radicals, can strengthen an in-vivo antioxidant system and inhibit the generation of free radicals, has high-efficiency antioxidant effect, good anti-aging effect and very mild property, and is also suitable for sensitive skin.

Preferably, the skin care composition comprises the following components in parts by weight: 0.01-2 parts of emblic leafflower fruit extract, 0.01-2 parts of moso bamboo leaf extract and 0.01-2 parts of laver extract. Experiments show that the synergistic effect of the skin care composition is better when the emblic leafflower fruit extract, the moso bamboo leaf extract and the laver extract are compounded according to the proportion.

More preferably, the skin care composition comprises the following components in parts by weight: 0.5-1.5 parts of emblic leafflower fruit extract, 0.1-1 parts of moso bamboo leaf extract and 1-2 parts of laver extract.

Most preferably, the skin care composition comprises the following components in parts by weight: 1 part of emblic leafflower fruit extract, 0.5 part of moso bamboo leaf extract and 1.5 parts of laver extract. Experiments show that the synergistic effect of the skin care composition is best when the emblic leafflower fruit extract, the moso bamboo leaf extract and the laver extract are compounded according to the proportion.

The invention also provides a cosmetic containing the skin care composition.

The invention also provides a barrier emulsion containing the skin care composition. The skin care composition not only enables the isolation emulsion to have better effects of resisting oxidation, removing wrinkles and moistening skin, but also can improve the sun protection effect of the isolation emulsion.

Preferably, the weight percentage of the skin care composition in the isolation milk is 0.1-5%. Experiments show that when the dosage of the skin care composition in the isolation milk reaches the value, the isolation milk has good comprehensive effect and low cost.

Preferably, the barrier emulsion further comprises emulsifiers, sunscreens, moisturizers, emollients, preservatives and thickeners.

Preferably, the emulsifier is at least one of cyclopentadimethylsiloxane, lauryl PEG-10 tris (trimethylsiloxy) silylethyl methicone, potassium cetyl phosphate, and hydrogenated castor oil.

Preferably, the sunscreen agent is at least one of titanium dioxide, zinc oxide, silica.

Preferably, the humectant is at least one of glycerin, butanediol, glyceryl polyether-26 and ubiquinone.

Preferably, the emollient is at least one of hydrogenated polydecene, dibutyl adipate, polydimethylsiloxane cross-linked polymer, and cyclopentadimethylsiloxane.

Preferably, the preservative is at least one of phenoxyethanol, a plant preservative and ethylhexyl glycerin.

Preferably, the plant preservative is a combination of an extract of zanthoxylum piperitum, an extract of pulsatillae radix and an extract of usnea barbata, available from korea C & B cosmesteic co.

Preferably, the thickening agent is at least one of acrylic acid (ester), polydimethylsiloxane copolymer and acrylic acid (ester) copolymer sodium.

Preferably, the isolation milk consists of the following components in percentage by weight:

phase A: 5 to 8 percent of humectant, 2 to 4 percent of sun-screening agent and 1 to 5 percent of emollient;

phase B: 4 to 6 percent of humectant and 2 to 4 percent of emulsifier;

and C phase: 2 to 5 percent of thickening agent;

phase D: 2 to 5 percent of sun-screening agent;

phase E: 0.1-5% of the skin care composition;

and (3) phase F: 0.01 to 1.5 percent of preservative;

the balance of deionized water.

Preferably, the preparation method of the isolation milk comprises the following steps:

(1) dispersing the D-phase raw material uniformly by using part of deionized water for later use;

(2) adding the phase A raw material into a container, stirring and heating to 75-90 ℃, uniformly mixing, and keeping the temperature for later use;

(3) adding the phase B raw material into a vacuum emulsifying pot, adding the rest deionized water, stirring and heating to 75-90 ℃, uniformly mixing, and keeping the temperature for later use;

(4) pumping the phase A raw material in the step (2) into a vacuum emulsifying pot filled with the phase B raw material, homogenizing and emulsifying for 3-6 min, after fully mixing uniformly, continuing to keep the temperature at 75-90 ℃ for 10-15 min, and then stirring and cooling;

(5) and (3) when the temperature of the material in the step (4) is reduced to 40-45 ℃, adding the phase C raw material and the phase D raw material dispersed in the step (1), uniformly mixing, then adding the phase E raw material, uniformly mixing, finally adding the phase F raw material, and uniformly mixing to obtain the isolation milk.

Preferably, in the preparation method of the isolation milk, the material in the step (4) is cooled at a constant speed, so that the product has better texture and is more stable.

Compared with the prior art, the invention has the beneficial effects that:

1. the skin care composition is compounded by the emblic leafflower fruit extract, the moso bamboo leaf extract and the laver extract, has high-efficiency antioxidant effect, good anti-aging effect, wrinkle-removing and skin-moistening effects, is natural and safe, and is mild and non-irritant to skin.

2. The skin care composition is added into a barrier product to prepare the barrier milk. The isolation emulsion not only has good isolation and sunscreen effects, but also has good effects of resisting oxidation, removing wrinkles and moistening, and overcomes the defects of unsatisfactory isolation effect and single effect of the existing isolation products.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention is further illustrated by the following examples. It should be understood that the embodiments of the present invention are only for illustrating the technical effects of the present invention, and are not intended to limit the scope of the present invention. In the examples, the methods used were all conventional methods unless otherwise specified.

Example 1

This example 1 provides a skin care composition, which comprises the following components in parts by weight: 1 part of emblic leafflower fruit extract, 0.5 part of moso bamboo leaf extract and 1.5 parts of laver extract.

Example 2

This example 2 provides a skin care composition, which comprises the following components in parts by weight: 1.5 parts of emblic leafflower fruit extract, 0.5 part of moso bamboo leaf extract and 1 part of laver extract.

Example 3

This example 3 provides a skin care composition, which comprises the following components in parts by weight: 0.5 part of emblic leafflower fruit extract, 0.5 part of moso bamboo leaf extract and 2 parts of laver extract.

Example 4

This example 4 provides a skin care composition, which comprises the following components in parts by weight: 1 part of emblic leafflower fruit extract, 0.1 part of moso bamboo leaf extract and 1.5 parts of laver extract.

Example 5

This example 5 provides a skin care composition, which comprises the following components in parts by weight: 1 part of emblic leafflower fruit extract, 1 part of moso bamboo leaf extract and 1.5 parts of laver extract.

Example 6

This example 6 provides a skin care composition, which comprises the following components in parts by weight: 2 parts of emblic leafflower fruit extract, 0.01 part of moso bamboo leaf extract and 2 parts of laver extract.

Example 7

This example 7 provides a skin care composition, which comprises the following components in parts by weight: 0.01 part of emblic leafflower fruit extract, 2 parts of moso bamboo leaf extract and 2 parts of laver extract.

Example 8

This example 8 provides a skin care composition, which comprises the following components in parts by weight: 2 parts of emblic leafflower fruit extract, 2 parts of moso bamboo leaf extract and 0.01 part of laver extract.

Example 9

This example 9 provides an isolation cream, which comprises the following components in percentage by weight:

phase A: 6% of butanediol, 3% of titanium dioxide and 3% of hydrogenated polydecene;

phase B: glyceryl polyether-265% and cyclopentadimethylsiloxane 3%;

and C phase: 3.5 percent of acrylic acid (ester) copolymer sodium;

phase D: 3% of silica;

phase E: 2% of the skin care composition of example 1;

and (3) phase F: 0.1 percent of phenoxyethanol and 0.4 percent of ethylhexyl glycerol;

the balance of deionized water.

The preparation method of the isolation milk comprises the following steps:

(2) adding the phase A raw material into a container, stirring and heating to 80 ℃, uniformly mixing, and keeping the temperature for later use;

(3) adding the phase B raw material into a vacuum emulsifying pot, then adding the rest deionized water, stirring and heating to 80 ℃, uniformly mixing, and keeping the temperature for later use;

(4) pumping the phase A raw material in the step (2) into a vacuum emulsifying pot filled with the phase B raw material, homogenizing and emulsifying for 5min, keeping the temperature at 80 ℃ for 15min after fully mixing uniformly, and then cooling at a constant speed under stirring;

(5) and (3) when the temperature of the material in the step (4) is reduced to 40 ℃, adding the phase C raw material and the phase D raw material dispersed in the step (1), uniformly mixing, then adding the phase E raw material, uniformly mixing, finally adding the phase F raw material, and uniformly mixing to obtain the isolation emulsion.

Example 10

This example 10 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 10, phase E is 2% (weight percent) of the skin care composition of example 2; the remaining components and preparation were the same as in example 9.

Example 11

This example 11 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 11, phase E is 2% (weight percent) of the skin care composition of example 3; the remaining components and preparation were the same as in example 9.

Example 12

This example 12 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 12, phase E is 2% (weight percent) of the skin care composition of example 4; the remaining components and preparation were the same as in example 9.

Example 13

This example 13 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 13, phase E is 2% (weight percent) of the skin care composition of example 5; the remaining components and preparation were the same as in example 9.

Example 14

This example 14 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 14, phase E is 2% (weight percent) of the skin care composition of example 6; the remaining components and preparation were the same as in example 9.

Example 15

This example 15 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 15, phase E is 2% (weight percent) of the skin care composition of example 7; the remaining components and preparation were the same as in example 9.

Example 16

This example 16 provides an isolation milk which differs from example 9 only in that: in the barrier milk of this example 16, phase E is 2% (weight percent) of the skin care composition of example 8; the remaining components and preparation were the same as in example 9.

Example 17

This example 17 provides an isolation cream, which comprises the following components by weight:

phase A: 3% of glycerin, 2% of ubiquinone, 2% of zinc oxide, 0.5% of dibutyl adipate and 0.5% of polydimethylsiloxane cross-linked polymer;

phase B: 4% of butanediol, 262% of glyceryl polyether, 1% of cyclopentadimethylsiloxane and 1% of lauryl PEG-10 tris (trimethylsiloxy) silylethyl methicone;

and C phase: 2% of polydimethylsiloxane copolymer and 3% of acrylic acid (ester) copolymer sodium;

phase D: titanium dioxide 4% and silica 1%;

phase E: 0.1% of the skin care composition of example 1;

and (3) phase F: EURO-NApre plant preservative 0.01%;

the balance of deionized water.

The preparation method of the isolation milk comprises the following steps:

(2) adding the phase A raw material into a container, stirring and heating to 75 ℃, uniformly mixing, and keeping the temperature for later use;

(3) adding the phase B raw material into a vacuum emulsifying pot, then adding the rest deionized water, stirring and heating to 75 ℃, uniformly mixing, and keeping the temperature for later use;

(4) pumping the phase A raw material in the step (2) into a vacuum emulsifying pot filled with the phase B raw material, homogenizing and emulsifying for 3min, keeping the temperature at 75 ℃ for 15min after fully mixing uniformly, and then cooling at a constant speed under stirring; the product has better and more stable texture by adopting a uniform cooling mode;

Example 18

This example 18 provides an isolation cream, which comprises the following components by weight:

phase A: 6% of butanediol, 262% of glyceryl polyether, 1% of silica, 3% of titanium dioxide and 2% of cyclopentadimethylsiloxane and 3% of hydrogenated polydecene;

phase B: glycerin 4%, potassium cetyl phosphate 2% and hydrogenated castor oil 2%;

and C phase: 2% of polydimethylsiloxane copolymer;

phase D: 2% of titanium dioxide;

phase E: 5% of the skin care composition of example 1;

and (3) phase F: EURO-NApre plant preservative 1.5%;

the balance of deionized water.

The preparation method of the isolation milk comprises the following steps:

(2) adding the phase A raw material into a container, stirring and heating to 90 ℃, uniformly mixing, and keeping the temperature for later use;

(3) adding the phase B raw material into a vacuum emulsifying pot, then adding the rest deionized water, stirring and heating to 90 ℃, uniformly mixing, and keeping the temperature for later use;

(4) pumping the phase A raw material in the step (2) into a vacuum emulsifying pot filled with the phase B raw material, homogenizing and emulsifying for 6min, keeping the temperature at 90 ℃ for 10min after fully mixing uniformly, and then cooling at a constant speed under stirring; the product has better and more stable texture by adopting a uniform cooling mode;

(5) and (3) when the temperature of the material in the step (4) is reduced to 45 ℃, adding the phase C raw material and the phase D raw material dispersed in the step (1), uniformly mixing, then adding the phase E raw material, uniformly mixing, finally adding the phase F raw material, and uniformly mixing to obtain the isolation emulsion.

Comparative example 1

Comparative example 1 provides a barrier milk which differs from example 9 only in that: in the skim milk of comparative example 1, phase E was 2% (weight percent) vitamin E; the remaining components and preparation were the same as in example 9.

Comparative example 2

Comparative example 2 provides a barrier milk which differs from example 9 only in that: in the barrier milk of comparative example 2, phase E is a 2% (weight percent) skin care composition consisting of the following components in parts by weight: 1 part of emblic leafflower fruit extract and 0.5 part of common lophatherum herb extract. The remaining components and preparation were the same as in example 9.

Comparative example 3

Comparative example 3 provides a barrier milk which differs from example 9 only in that: in the barrier milk of comparative example 3, phase E was a 2% (weight percent) skin care composition consisting of the following components in parts by weight: 1 part of emblic leafflower fruit extract and 1.5 parts of laver extract. The remaining components and preparation were the same as in example 9.

Comparative example 4

Comparative example 4 provides a barrier milk which differs from example 9 only in that: in the barrier milk of comparative example 4, phase E was a 2% (weight percent) skin care composition consisting of the following components in parts by weight: 0.5 part of moso bamboo leaf extract and 1.5 parts of laver extract. The remaining components and preparation were the same as in example 9.

First, safety evaluation

Human skin patch test: 100 volunteers without skin allergy history and with the age range of 20-45 years are selected as the subjects. And subjects were randomized into 10 groups of 10 people each. Under the environmental conditions that the temperature is 23-25 ℃ and the humidity is 50% -60%, the inner side of the arm of a subject is selected as a tested area, the area of the tested point is 5cm multiplied by 5cm, and the isolation milk of the embodiment 9-18 is respectively coated on the test area. The skin reactions were observed at 0.5h, 1h, 2h, 4h, 8h, 12h, 24h, 48h after application, respectively.

Through observation, no anaphylactic reaction occurs in a test subject, which shows that the isolation milk provided by the invention is mild and non-irritant to skin and safe to use.

Second, evaluation of stability

The stability evaluation is carried out according to GB/T29665-2013.

And (3) testing heat resistance stability: the isolated milk samples of examples 9-18 were each placed in a 39 ℃ incubator and maintained for 24 hours, and then returned to room temperature for observation. The appearance of the sample is not changed compared with the sample before treatment, and the delamination phenomenon does not occur.

And (3) testing cold resistance stability: the isolated milk samples of examples 9-18 were each placed in a constant temperature incubator at-8 ℃ for 24 hours, and observed after returning to room temperature. The appearance of the sample is not changed compared with the sample before treatment, and the delamination phenomenon does not occur.

And (3) centrifugal test: and (3) respectively taking a proper amount of the isolation milk of the embodiment 9-18, placing the isolation milk in a centrifuge tube, centrifuging the isolation milk for 30min at the rotating speed of 2000r/min, and observing the phenomenon. The appearance of the sample is not changed compared with the sample before treatment, and the delamination phenomenon does not occur.

The stability test result shows that the isolation emulsion has good stability, all components are uniformly dispersed, and the delamination phenomenon is not easy to occur.

Evaluation of wrinkle-removing efficacy

140 volunteers 25 to 50 years old were selected and divided equally into 14 groups at random, 10 persons in each group, and the barrier milks of examples 9 to 18 and the barrier milks of comparative examples 1 to 4 were used, respectively. The test is carried out under the relatively stable environmental condition that the temperature is 24-26 ℃ and the humidity is 50-60%. Subjects applied isolation milk twice daily to their faces and after using the test specimens, subjects were observed for 8 weeks using DermaTOP. (VISION-3D Rapid imaging method: skin Rapid imaging analysis System DermaTOP uses fringe projection measurement technique to obtain wrinkle index by primary positioning of head and two ear sensors, secondary positioning of face laser, image capture by camera, three-dimensional skin rapid imaging and computer processing of images.) the results of the tests are shown in Table 1.

TABLE 1 wrinkle removing efficacy

Group of	Wrinkle depth reduction ratio (%)
		Example 9	59.6
Example 10	57.5
		Example 11	52.3
Example 12	54.1
		Example 13	55.6
Example 14	54.8
		Example 15	50.7
Example 16	52.8
		Example 17	45.6
Example 18	55.3
		Comparative example 1	10.5
Comparative example 2	48.6
		Comparative example 3	49.2
Comparative example 4	22.9

As can be seen from the results in Table 1, the barrier creams of the examples of the present invention all have good wrinkle-removing effects, and the effects are significantly better than those of comparative example 1, which shows that the skin care composition of the present invention has good wrinkle-removing effects.

As can be seen from the analysis of the effects of examples 9 to 16, in the skin care composition of example 1, the following description will be made on the basis that the wrinkle-removing effect is the most excellent in the same amount of the skin care composition, in which the extract of emblic leafflower fruit: and (3) extracting moso bamboo leaves: when the laver extract is 1:0.5:1.5, the wrinkle removing effect of the skin care composition is optimal.

Analyzing the effects of the example 9 and the comparative examples 2 to 4, it can be seen that when the emblic leafflower fruit extract, the phyllostachys pubescens leaf extract and the laver extract are compounded for use, the wrinkle removing effect of the skin care composition is remarkably improved, and the three components have a synergistic effect.

From the results of comparative examples 2 to 4, it can be seen that the wrinkle-removing effects of comparative examples 2 and 3 are significantly better than comparative example 4, thus indicating that the main active ingredient exerting the wrinkle-removing effect is the emblic leafflower fruit extract.

Fourth, evaluation of antioxidant efficacy

Utilize a stabilizerDefinite organic radical 1, 1-diphenyl-2-trinitrophenylhydrazine (C)₁₈H₁₂N₅O₆DPPH) acts with a radical scavenger, changing from violet to colorless. After DPPH was applied to the isolated milk samples of examples and comparative examples, the free radical scavenging condition was detected by quantitative analysis using spectrophotometry. The method comprises the following specific steps: adding 4.0mL of DPPH solution and an isolation milk sample into a 10mL colorimetric tube in sequence, adding absolute ethyl alcohol to scale, immediately measuring an absorbance value (A) at a wavelength of 517nm by using a 1cm cuvette after uniformly mixing, marking the absorbance value as Ai, measuring the absorbance value after storing in a greenhouse in a dark place for 30min, marking the absorbance value as Aj, using an ethanol solution only added with DPPH as a contrast test, marking the absorbance value as Ac, repeatedly testing each sample for 5 times, taking an average value, and calculating the radical clearance (K) according to the following formula:

K(％)＝[1-(Ai-Aj)/Ac]×100％。

the test results are shown in table 2.

TABLE 2 antioxidant efficacy

As can be seen from the results in table 2, the barrier cream of the embodiment of the present invention has a better antioxidant effect, and the effect is significantly better than that of the comparative example 1, so that the skin care composition of the present invention has a better antioxidant effect.

As can be seen from the analysis of the effects of examples 9 to 16, the skin care composition of example 1, in which the phyllanthus emblica extract: and (3) extracting moso bamboo leaves: when the laver extract is 1:0.5:1.5, the skin care composition has the optimal antioxidant effect.

By analyzing the effects of the example 9 and the comparative examples 2 to 4, the antioxidant effect of the skin care composition is remarkably improved when the emblic leafflower fruit extract, the phyllostachys pubescens leaf extract and the laver extract are compounded for use, which shows that the three components have a synergistic interaction effect.

From the results of comparative examples 2 to 4, it can be seen that the antioxidant effects of comparative examples 2 and 3 are significantly better than comparative example 4, thus indicating that the main active ingredient exerting the antioxidant effect is the emblic leafflower fruit extract.

Evaluation of sunscreen efficacy

140 subjects with no history of photosensitivity were randomly selected and divided into 14 groups. The Minimum Eryththema (MED) value of skin caused by not using isolated milk sample for each subject is firstly determined, isolated milk is coated on the inner side of arm in a fixed amount in 5cm multiplied by 5cm area under relative stable environment by the subject, xenon lamp is used for simulating sunlight, and irradiation is carried out from low to high according to the MED of the subject and the Sun Protection Factor (SPF) estimated by the isolated milk sample, and the MED coated with the sunscreen cosmetic is determined. Then the individual spf ═ MED of barrier milk coated/barrier milk uncoated; the milk barrier test SPF is SPF/50.

The test results are shown in table 3.

TABLE 3 Sun protection efficacy

Group of	Sun Protection Factor (SPF)
		Example 9	18±2
Example 10	15±3
		Example 11	19±3
Examples12	14±2
		Example 13	18±2
Example 14	16±1
		Example 15	17±2
Example 16	13±2
		Example 17	11±3
Example 18	15±1
		Comparative example 1	6±1
Comparative example 2	7±2
		Comparative example 3	12±3
Comparative example 4	11±3

As can be seen from the results in Table 3, the barrier creams of the examples of the present invention all have better sunscreen effects, and the effects are significantly better than those of comparative example 1, which shows that the skin care composition of the present invention can effectively improve the sunscreen effects of the barrier creams of the formula of the present invention.

According to the results of the examples and the comparative examples 2-4, the sunscreen effect of the isolation emulsion of the examples is better than that of the comparative examples under the condition of the same addition amount, and the skin care composition has a better effect of improving the sunscreen effect of the isolation emulsion when the emblic leafflower fruit extract, the phyllostachys pubescens leaf extract and the laver extract are compounded and used.

From the results of comparative examples 2 to 4, it can be seen that the sunscreen effect of comparative example 3 and comparative example 4 is better than that of comparative example 2, because the laver extract is contained in comparative example 3 and comparative example 4, which indicates that the addition of the laver extract helps to improve the sunscreen effect of the isolation milk.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The isolation milk is characterized by comprising the following components in percentage by weight:

phase A: 5-8% of a humectant, 2-4% of a sun-screening agent and 1-5% of an emollient;

phase B: 4% -6% of a humectant and 2% -4% of an emulsifier;

and C phase: 2% -5% of a thickening agent;

phase D: 2% -5% of a sun-screening agent;

phase E: 2% or 5% of skin care composition;

and (3) phase F: 0.01% -1.5% of preservative;

the balance of deionized water;

the skin care composition comprises the following components in parts by weight: 0.5-1.5 parts of emblic leafflower fruit extract, 0.1-1 parts of moso bamboo leaf extract and 1-2 parts of laver extract;

when the weight percentage of the skin care composition is 2%, the humectant of the phase A is butanediol, the sunscreen agent is titanium dioxide, the emollient is hydrogenated polydecene, the humectant of the phase B is glyceryl polyether-26, the emulsifier is cyclopenta dimethyl silicone polymer, the thickener of the phase C is acrylic acid (ester) copolymer sodium, the sunscreen agent of the phase D is silica, and the preservative of the phase F is a mixture of phenoxyethanol and ethylhexylglycerin;

when the skin care composition is 5% by weight, the humectant of the phase A is a mixture of butanediol and glyceryl polyether-26, the sunscreen agent is a mixture of titanium dioxide and silica, the emollient is a mixture of hydrogenated polydecene and cyclopentadimethylsiloxane, the humectant of the phase B is glycerin, the emulsifier is a mixture of potassium cetyl phosphate and hydrogenated castor oil, the thickener of the phase C is a polydimethylsiloxane copolymer, the sunscreen agent of the phase D is titanium dioxide, and the preservative of the phase F is a EURO-NApre plant preservative.

2. The barrier milk of claim 1, comprising the following components in parts by weight: 1 part of emblic leafflower fruit extract, 0.5 part of moso bamboo leaf extract and 1.5 parts of laver extract.

3. The method of preparing a barrier milk of claim 1 comprising the steps of: