CN114939071A

CN114939071A - Cosmetic composition for lightening skin color and preparation method thereof

Info

Publication number: CN114939071A
Application number: CN202210542257.4A
Authority: CN
Inventors: 钱好好
Original assignee: Shanghai Ohye Cosmetics Co ltd
Current assignee: Shanghai Ohye Cosmetics Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-08-26

Abstract

The present disclosure provides a cosmetic composition for lightening skin color, comprising: (a) emulsifier, emollient, thickener, film former, colorant, solvent, electrolyte, dispersant and antiseptic; (b) triethoxyoctylsilane coated treated mica; (c) bismuth oxychloride pre-dispersed in esters; (d) styrene-maleic anhydride copolymers; (e) vinyl dimethicone/methicone silsesquioxane crosspolymer; and (f) a fluorescent material comprising quantum dots. According to the cosmetic composition disclosed by the disclosure, the whitening component and the brightening component can be fully dispersed to form a uniform and fine coating structure by adding the styrene-maleic anhydride copolymer, and the natural and brightening luster is given to the cosmetics by combining with the addition of the quantum dot fluorescent material.

Description

Cosmetic composition for lightening skin color and preparation method thereof

Technical Field

The disclosure relates to the field of cosmetics, in particular to a cosmetic composition for brightening skin color and a preparation method thereof.

Background

Some cosmetics on the market generally adopt titanium dioxide and ferric oxide series colorants to be added into a formula to play a role in covering in order to cover skin flaws and brighten skin color, wherein titanium dioxide with different whiteness, commonly called titanium white, is also used for helping products to play a role in brightening skin color. However, due to the strong hiding power of titanium dioxide, the skin color is unnatural, and a 'false white' visual effect is easily generated.

Some cosmetics are added with pearlescent pigments to lighten the skin color, and the mechanism is that the reflected light produces a shiny visual effect due to the reflection characteristic of the pearlescent pigments. Obviously, such a lightening appears unnatural; further, excessive use of pearlescent pigments causes discomfort in skin feel due to their large particle size.

The foundation liquid can brighten skin color by adding high-refractive-index grease, has poor effect durability, unnatural makeup, is easy to form false face effect, and has floating powder and blocking powder effects after makeup; the foundation liquid has creamy texture, the smearing feeling is silky and not greasy, the foundation liquid is not oily and stuffy after being made up, and the foundation liquid is natural and attractive in luster.

Disclosure of Invention

The disclosed embodiments are directed to providing a cosmetic composition for lightening skin color and a preparation method thereof, which can solve the above problems by adding a styrene-maleic anhydride copolymer to sufficiently disperse whitening components and lightening components into a uniform and fine coating structure, and adding a quantum dot fluorescent material to impart natural and lightened luster to the cosmetic.

In order to achieve the above object, in a first aspect, embodiments of the present disclosure provide a cosmetic composition for lightening skin color, including:

(a) emulsifier, emollient, thickener, film former, colorant, solvent, electrolyte, dispersant and antiseptic;

(b) triethoxycaprylylsilane coated treated mica;

(c) pre-dispersing bismuth oxychloride in esters;

(d) styrene-maleic anhydride copolymers;

(e) vinyl dimethicone/methicone silsesquioxane crosspolymer; and

(f) a fluorescent material comprising quantum dots.

Further, the emulsifier comprises cetyl PEG/PPG-10/1 polydimethylsiloxane and/or polyglycerol-2-diisostearate.

Further, the emollient comprises one or more of cyclopentadimethylsiloxane, isocetyl myristate, hydrogenated polyisobutene, ethylhexyl palmitate, cetyl ethylhexanoate, diethylhexyl carbonate, and glycerin.

Further, the thickener comprises disteardimonium hectorite, and/or the film former comprises trimethylsiloxysilicate, and/or the dispersant comprises SN5040 or SN 5027.

Further, the weight ratio of the mica coated with triethoxyoctylsilane to the bismuth oxychloride pre-dispersed in the esters in the composition is 3: 7-7: 3.

Further, the particle size of the mica subjected to triethoxyoctylsilane coating treatment is not more than 20 microns, and the particle size of the bismuth oxychloride pre-dispersed in the esters is not more than 20 microns.

Further, the fluorescent material containing quantum dots is characterized by being composed of quantum dots or a composite of quantum dots and a non-quantum dot fluorescent material.

Further, the cosmetic composition according to claim 8, wherein the quantum dots are nano semiconductor materials composed of one or more elements of carbon, silicon, germanium, tin, lead, cadmium, zinc, sulfur, selenium, tellurium, boron, aluminum, gallium, indium, nitrogen, phosphorus, arsenic and antimony, and the non-quantum dot fluorescent material comprises rare earth fluorescent powder and/or organic fluorescent powder.

Further, the composition also comprises at least one vitamin component and/or amino acid component of vitamin B-E.

In a second aspect, embodiments of the present disclosure provide a method for preparing a skin lightening cosmetic composition, comprising:

(a) preparing a base component comprising an emulsifier, an emollient, a thickener, a film-forming agent, a colorant, a solvent, an electrolyte, a dispersant and a preservative;

(b) pre-dispersing bismuth oxychloride into esters to form a uniform solution;

(c) adding styrene-maleic anhydride copolymer into a uniform solution of bismuth oxychloride pre-dispersed in esters for high-speed dispersion;

(d) adding triethoxy octyl silane coated mica, and performing ultrasonic treatment to obtain bismuth oxychloride-SMA-mica composite slurry;

(e) uniformly adding vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer; and

(f) and adding a fluorescent material containing quantum dots, and uniformly mixing to obtain the slurry compound.

In a second aspect, embodiments of the present disclosure provide a foundation, a foundation or a skin care cream comprising a skin lightening cosmetic composition comprising at least one more of the cosmetic compositions.

The present disclosure provides a cosmetic composition for lightening skin color, comprising: (a) emulsifier, emollient, thickener, film former, colorant, solvent, electrolyte, dispersant and antiseptic; (b) triethoxyoctylsilane coated treated mica; (c) pre-dispersing bismuth oxychloride in esters; (d) styrene-maleic anhydride copolymers; (e) vinyl dimethicone/methicone silsesquioxane crosspolymer; and (f) a fluorescent material comprising quantum dots. According to the cosmetic composition disclosed by the disclosure, the whitening component and the brightening component can be fully dispersed to form a uniform and fine coating structure by adding the styrene-maleic anhydride copolymer, and the natural and brightening luster is given to the cosmetics by adding the quantum dot fluorescent material. The cosmetic adopting the composition has creamy texture, is silky and not greasy in smearing sense, is not oily and stuffy after being made up, and is naturally attached and bright.

The foregoing is a summary of the present disclosure, and for the purposes of promoting a clear understanding of the technical means of the present disclosure, the present disclosure may be embodied in other specific forms without departing from the spirit or essential attributes thereof.

Drawings

FIG. 1 is a schematic view of a skin lightening cosmetic composition provided by an embodiment of the present disclosure;

fig. 2 is a schematic view illustrating a method for preparing a skin-lightening cosmetic composition according to an embodiment of the present disclosure.

Detailed Description

In order to more clearly describe the technical content of the present disclosure, the following further description is given in conjunction with specific embodiments.

The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more complete and thorough understanding of the present disclosure. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be understood that the various steps recited in method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.

It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The disclosed embodiments are described in detail below with reference to the accompanying drawings.

The liquid foundation aims to solve the problems that the liquid foundation has creamy texture, the smearing feeling is silky and not greasy, the liquid foundation is not oily and stuffy after makeup, and the liquid foundation is natural, attractive and colorful. A cosmetic composition for naturally lightening skin color, its preparation method, and cosmetics such as foundation liquid, foundation cream or skin care cream using the cosmetic composition are provided. The cosmetic composition in the present disclosure is not limited to the above-mentioned products, and the cosmetic composition may be, but is not limited to, lipstick, lip gloss, moisturizing lipstick, nail polish, foundation, face powder, foundation, concealer, blush, eye shadow, eyeliner, mascara, or bronzer. The personal care product can be in any suitable form that imparts color to the skin of a human. For example, personal care products may include day creams or lotions, night creams or lotions, sun lotions, creams or oils and other SPF products, moisturizers, ointments, salves, gels, body milks, artificial browning compositions, and the like.

FIG. 1 is a schematic view of a skin lightening cosmetic composition provided by an embodiment of the present disclosure; a cosmetic composition in the present disclosure, comprising: (a) emulsifier, emollient, thickener, film former, colorant, solvent, electrolyte, dispersant and antiseptic; (b) triethoxycaprylylsilane coated treated mica; (c) pre-dispersing bismuth oxychloride in esters; (d) styrene-maleic anhydride copolymers; (e) vinyl dimethicone/methicone silsesquioxane crosspolymer; and (f) a fluorescent material comprising quantum dots.

Wherein the basic components of the component (a), which are composed of emulsifier, emollient, thickener, film forming agent, colorant, solvent, electrolyte, dispersant and preservative, account for 90-95% of the weight of the cosmetic composition. And the mica coated by the triethoxyoctylsilane (b) accounts for 0.1 to 1.2 percent of the weight of the cosmetic composition, the bismuth oxychloride (c) pre-dispersed in the esters accounts for 0.1 to 0.5 percent of the weight of the cosmetic composition, the styrene-maleic anhydride copolymer (d) accounts for 0.1 to 0.5 percent of the weight of the cosmetic composition, the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer (e) accounts for 0.5 to 1.5 percent of the weight of the cosmetic composition, and the fluorescent material (f) containing quantum dots accounts for 0.1 to 1.5 percent of the weight of the cosmetic composition.

Preferably, the weight ratio of the triethoxyoctylsilane-coated mica to the bismuth oxychloride pre-dispersed in the ester in the composition (b) is 3: 7-7: 3. Further, the weight ratio of the mica coated with triethoxyoctylsilane to the bismuth oxychloride pre-dispersed in the esters in the composition is 4: 6-6: 4. In the composition, the grain diameter of the mica coated by the triethoxyoctylsilane is not more than 20 μm, and the grain diameter of the bismuth oxychloride pre-dispersed in the esters is not more than 100 nm. The mica particle size coated by triethoxyoctylsilane has better activity, so that nano-scale bismuth oxychloride pre-dispersed in esters can be better combined with the mica particle size, a synergistic effect is further exerted, the colors of the mica and the bismuth oxychloride are compounded, and the effect of naturally brightening the skin is improved. In one of the above natural skin lightening compositions, the bismuth oxychloride comprises from 15% to 25% by weight of component (b).

In the natural skin color brightening composition, the pre-dispersed esters in the component (c) comprise one or more of ethylhexyl hydroxystearate, isopropyl myristate and triisocetyl citrate.

In one of the above natural skin lightening compositions, the composition further comprises: (d) styrene-maleic anhydride copolymers. The Styrene-Maleic Anhydride Copolymer (SMA, CAS number 9011-13-6) can fully disperse the whitening component of the component (a) and the bright component of the component (b) to form a uniform and fine coating structure, thereby endowing the cosmetics with natural gloss. In the embodiment of the disclosure, styrene-maleic anhydride copolymer is added into bismuth oxychloride pre-dispersed in esters for high-speed dispersion, then mica coated with triethoxy octyl silane is added, and the bismuth oxychloride-SMA-mica composite slurry is obtained by ultrasonic treatment. In the natural skin color-improving cosmetic composition, the styrene-maleic anhydride copolymer accounts for 10-20% of the weight of the composition. The synergistic effect of the composition can be better exerted by adding the styrene-maleic anhydride copolymer into the composition. The cosmetic also has better comfort and lasting duration, which shows that the formula disclosed by the invention can greatly improve the sense of a user and endow the skin with better gloss.

In one of the above natural skin lightening compositions, the composition further comprises: (e) the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer accounts for 0.5-1.5% of the weight of the cosmetic composition. The vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer is a composite powder of silicone resin-coated silicone rubber powder, has excellent smoothness and elasticity, serves the purposes of skin feel conditioning, consistency control and the like in a cosmetic composition, has the effect of mainly moisturizing in cosmetics and daily use chemical products, and can also be used as a thickener instead of cosmetics.

In the above natural skin lightening composition, the composition further comprises: (f) a fluorescent material comprising quantum dots. In the disclosed embodiments, the fluorescent material comprising quantum dots consists of quantum dots or a composite of quantum dots and a non-quantum dot fluorescent material. The quantum dots are nano semiconductor materials composed of one or more elements of carbon, silicon, germanium, tin, lead, cadmium, zinc, sulfur, selenium, tellurium, boron, aluminum, gallium, indium, nitrogen, phosphorus, arsenic and antimony, and the non-quantum dot fluorescent materials comprise rare earth fluorescent powder and/or organic fluorescent powder. When the fluorescent material only adopts the quantum dots, the content R of the quantum dots is as follows: g: b is 3-7: 10-15: 6 to 11. Preferably, when the fluorescent material employs only quantum dots, the content R of the quantum dots: g: b is 5: 13: 8. it should be noted that the RGB color scheme is a color standard in the industry, and RGB is a color representing three channels of red, green and blue. The RGB color scheme is a variety of colors obtained by changing three color channels of R (Red), G (Green ) and B (Blue) and superimposing them on each other. This standard covers almost all colors that human vision can perceive, and is one of the most widely used color systems today. When the fluorescent material is composed of a composite of quantum dots and a non-quantum dot fluorescent material, the ratio of the mass of the quantum dots to the non-quantum dot fluorescent material is between 0.1 and 1. By adding the quantum dot fluorescent material, the gloss and skin-lightening durability of the cosmetic can be improved, the sense of a user can be greatly improved, and the skin can be endowed with better gloss.

The preparation method of the quantum dot fluorescent material comprises the following steps:

step one, mixing the quantum dots and a non-quantum dot fluorescent material to obtain a fluorescent material;

step two, mixing the fluorescent material, the resin and the filler through mechanical stirring or ultrasonic oscillation to obtain a mixture;

and step three, vacuumizing the mixture for 5-180 min at the temperature of 20-30 ℃ and under the pressure of 0.01-0.3 MPa to obtain the quantum dot fluorescent material.

Preferably, the mixture is vacuumized for 10-60 min at 25 ℃ and 0.1MPa to obtain the quantum dot fluorescent material.

In addition, the composition further comprises (g) at least one vitamin component selected from the group consisting of vitamins B-E and/or (h) an amino acid component. Wherein (g) at least one vitamin component of vitamin B-E accounts for 0.1-1.5% of the weight of the cosmetic composition. Wherein the vitamin D3, vitamin E, vitamin C, vitamin B1, vitamin B2, vitamin B6, vitamin B12, folic acid, dexpanthenol, biotin, and nicotinamide are contained. Vitamin B6 is a coenzyme of many enzyme systems in the body and is involved in decarboxylation of amino acids, transamination, tryptophan synthesis, metabolism of sulfur-containing amino acids, aminolevulinic acid formation and metabolism of unsaturated fatty acids. The cosmetics obtained by adding the vitamin B-E components can inhibit bacteria, diminish inflammation and enhance the moisturizing function of skin, and simultaneously have the effects of resisting oxidation and promoting the healthy repair of the skin, and the vitamins can promote the generation and the activity of amino acid substances of the skin, so that the whole components are safe, non-irritant, non-toxic and free of side effects, the healthy state of the skin is effectively improved, and the skin care effect is better. (h) The amino acid component accounts for 0.1-1.5% of the weight of the cosmetic composition. In the disclosed embodiment, the cosmetic composition comprises a composition consisting of N-acyl amino acid salt and plant peptide and an auxiliary agent, and preferably, the content of the N-acyl amino acid salt/plant peptide composition in the skin care cosmetic is 0.5-2.5% by mass; the mass percentage content is preferably 1.0-1.8%. In a more preferable scheme, the N-acylamino acid salt/plant peptide composition is composed of N-acylamino acid salt and plant peptide according to the mass ratio of 1: 10-10: 1; more preferably, the mass ratio is 1:1 to 10: 2. The amino acid surfactant has excellent characteristics of safety, low irritation, good biocompatibility and the like, and can be safely applied to cosmetic products. Amino acid surfactants also have a variety of important applications in cosmetics, such as emulsification, dispersion, solubilization, foaming, cleansing, softening, anti-static, moisturizing, and penetration effects in cosmetics.

The cosmetic composition for naturally lightening skin color in the disclosed embodiment specifically comprises: 0.1 to 1.2 wt% of component (b), 0.1 to 0.5 wt% of component (c), 0.1 to 0.5 wt% of component (d), 0.5 to 1.5 wt% of component (e), 0.1 to 1.5 wt% of component (f), and 90 wt% to 95 wt% of a base component.

Alternatively, another embodiment, comprises: 0.1 wt% to 0.5 wt% of any one or more of the components (b) to (f) of the natural skin lightening cosmetic composition, and 90 wt% to 99.9 wt% of a base ingredient, respectively.

Alternatively, another embodiment, comprises: 0.1 wt% to 0.5 wt% of any of the above components (b) to (f) of the natural skin lightening cosmetic composition, and 99.5 wt% to 99.9 wt% of a base component.

In the cosmetic composition for naturally lightening skin color, the basic components comprise the following components in parts by weight:

2-5 parts of emulsifier

30-35 parts of emollient

0.1 to 0.5 portion of thickening agent

1-3 parts of film forming agent

0.2 to 1 portion of filling agent

10-15 parts of colorant

40-45 parts of solvent

0.01-1 part of electrolyte

5-10 parts of dispersant

0.01 to 0.5 portion of preservative

In one of the above-mentioned natural skin-lightening cosmetic compositions, the emulsifier comprises cetyl PEG/PPG-10/1 dimethicone and/or polyglycerin-2-diisostearate.

The emollient comprises one or more of cyclopentadimethicone, isocetyl myristate, hydrogenated polyisobutene, ethylhexyl palmitate, cetyl ethylhexanoate, diethylhexyl carbonate, dimethicone/vinyl dimethicone crosspolymer, and glycerin;

the thickener comprises disteardimonium hectorite.

The film-forming agent comprises trimethylsiloxysilicate.

The filler comprises a vinyl dimethicone/methicone silsesquioxane crosspolymer.

The colorant comprises one or more of titanium dioxide, iron oxide red, yellow iron oxide and titanium oxide.

The solvent comprises water and didecyl alcohol.

The electrolyte comprises sodium chloride and/or magnesium sulfate.

The dispersant comprises SN5040 or SN 5027.

The preservative comprises phenoxyethanol.

The concentration of the dideal alcohol is 95 percent.

In another specific embodiment of the present disclosure, the composition further includes the following components (by weight ratio) in addition to triethoxyoctylsilane coated mica (by weight ratio of 1 to 3%), bismuth oxychloride pre-dispersed in esters (by weight ratio of 0.1 to 1.2%), styrene-maleic anhydride copolymer (by weight ratio of 0.1 to 0.5%), vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer (by weight ratio of 0.5 to 1.5%), and a fluorescent material containing quantum dots (by weight ratio of 0.1 to 1.5%): water: 35-42% of titanium dioxide: 9-14% of cyclopentadimethicone: 3-7% and glycerol: 3-7%, 1, 3-propanediol: 3-7%, glycerol tri (ethyl hexanoate): 2-6% of polydimethylsiloxane: 2-6% of phenyl trimethicone: 2-6% of lauryl PEG-9 polydimethylsiloxyethyl polydimethylsiloxane: 1-5%, caprylic/capric triglyceride: 1-5%, diisostearyl malate: 1-5%, trimethylsiloxy silicate: 0.5-3%, talcum powder: 1-3%, PEG-10 polydimethylsiloxane: 0.5-1.5%, dipentaerythritol tri-polyhydroxystearate: 0.5 to 1.5%, pentaerythritol tetrakis (ethyl hexanoate): 0.5 to 1.5%, sodium chloride: 0.5 to 1.5%, disteardimonium hectorite: 0.5-1.5%, CI 77492: 0.5-3%, tocopherol (vitamin E): 0.3-0.7%, PEG-10 polydimethylsiloxane/vinyl polydimethylsiloxane crosspolymer: 0.1-0.5%, phenoxyethanol: 0.1-0.5%, CI 77491: 0.1 to 0.5%, triethoxyoctylsilane: 0.1-0.5%, bisabolol: 0.1 to 0.5%, methyl hydroxybenzoate: 0.1 to 0.5%, propylene carbonate: 0.1-0.5%, CI 77499: 0.1 to 0.5%, propyl hydroxybenzoate: 0.05-0.15%, disodium EDTA: 0 to 0.1%, ethylhexyl hydroxystearate: 0-0.1%, butanediol: 0-0.1%, 1, 2-hexanediol: 0-0.1%, Bonnate Spirulina extract: 0-0.1% of silk extract: 0-0.1% of p-hydroxyacetophenone: 0-0.1%, pearl extract: 0-0.1%, malic acid: 0 to 0.1%, isononyl isononanoate: 2-6%, isododecane: 0.3-0.8% and dimethicone/vinyl dimethicone crosspolymer: 0.3 to 0.8 percent.

The disclosure is further illustrated by the following examples:

example 1

A natural skin lightening cosmetic composition comprising 30% by weight of triethoxycaprylylsilane-coated mica and 70% by weight of bismuth oxychloride predispersed in ethylhexyl hydroxystearate.

Example 2

A natural skin lightening composition comprising 40 wt% triethoxyoctylsilane coated mica and 60 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate.

Example 3

A natural skin lightening composition comprising 50 wt% triethoxycaprylylsilane coated mica and 50 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate.

Example 4

A natural skin lightening composition comprising 60 wt% triethoxycaprylylsilane-coated mica and 40 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate.

Example 5

A natural skin lightening composition comprising 70 wt% triethoxycaprylylsilane coated mica and 30 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate.

In the compositions of examples 1 to 5, the particle size of the mica coated with triethoxyoctylsilane is not more than 20 μm, and the particle size of the bismuth oxychloride pre-dispersed in the esters is not more than 100 nm. The preparation method of the composition comprises the following steps: adding the mica coated with triethoxyoctylsilane into bismuth oxychloride pre-dispersed in esters according to a set proportion, and treating for 1h in ultrasonic to obtain a composition product.

Example 6

A natural skin lightening composition comprising 45 wt% triethoxyoctylsilane coated mica, 45 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate and 10 wt% styrene-maleic anhydride copolymer.

The composition of example 6 was prepared in the following manner: adding styrene-maleic anhydride copolymer into bismuth oxychloride pre-dispersed in esters, dispersing for 30min at a high speed by using a high-speed dispersion machine, adding mica coated by triethoxyoctylsilane, and performing ultrasonic treatment for 1h to obtain the bismuth oxychloride-SMA-mica composite slurry product.

Comparative example 1

The composition comprises only triethoxycaprylylsilane coated mica.

Comparative example 2

Only a slurry of bismuth oxychloride predispersed in ethylhexyl hydroxystearate was included in the composition.

Comparative example 3

The composition comprised 50 wt% mica and 50 wt% bismuth oxychloride pre-dispersed in ethylhexyl hydroxystearate.

Application example

A natural skin lightening foundation formulation comprising 99.5 wt% of the base ingredients and reserving 0.5 wt% of the components provided for examples 1-6 and comparative examples 1-3, samples 1-9 were sequentially made, respectively.

Wherein, the base components and the weight ratio thereof are shown in table 1:

the functions, formula weight/part and INCI names are as follows:

TABLE 1

As shown in table 1 above, the LAB tester is used to test the values of L, a and B of the above samples 1-9, where L is a brightness value and A, B is a chroma value, and the specific results are shown in table 2:

D65	sample 1	Sample 2	Sample 3	Sample No. 4	Sample 5	Sample 6	Sample 7	Sample 8	Sample 9
										L	64.11	70.33	72.2	74.21	63.26	76.49	60.25	62.23	63.56
A	12.65	12.81	12.73	12.55	12.23	12.52	10.52	11.96	11.74
										B	24.25	23.96	23.53	24.02	23.97	22.63	19.35	18.33	19.68

TABLE 2

The results show that the L values of samples 1 to 6, especially samples 2 to 4 and sample 6 are significantly higher than those of other samples, and it can be seen that the composition provided by the present disclosure has better brightening effect under the condition of the same addition amount, especially the L value of sample 6 is higher compared with sample 3, which indicates that the synergistic effect of the composition can be better exerted by adding the styrene-maleic anhydride copolymer in the composition, and at the same time, the sample is added with the fluorescent material containing quantum dots, in this example, the nano material composed of the added carbon element is taken as an example, the fluorescent material of this example only adopts quantum dots, and the content R of the quantum dots: g: b is 3-7: 10-15: 6 to 11. It should be noted that the RGB color scheme is a color standard in the industry, and RGB is a color representing three channels of red, green and blue. The RGB color scheme is a variety of colors obtained by changing three color channels of R (Red), G (Green ) and B (Blue) and superimposing them on each other. This standard covers almost all colors that human vision can perceive, and is one of the most widely used color systems today.

Taking the above samples for preference evaluation

The experimental method comprises the following steps: the use test was performed by 45 evaluators (18-65 years old, female) who applied the sample to the face immediately after evaluation and re-evaluated at 8 hours of use.

The following grades were scored, and the average value of the scores of all evaluators was calculated, and the evaluation was performed based on the following grade standards.

The evaluation items include: lasting make-up effect, natural color, glossy skin and comfortable feeling

Rating evaluation criteria (5 point system): very preferably 5 minutes; the good is 3 minutes; the comparative difference was 1, and the difference was 0 min.

The results are shown in Table 3:

lasting cosmetic effect, natural color, luster, natural skin feeling and comfortable feeling

TABLE 3

The results show that samples 1 to 6 have significant advantages in the evaluation items of color naturalness, skin glossiness and glossiness naturalness. In particular, sample 6, to which the fluorescent material containing quantum dots was added, was able to perform better in gloss, and also had better comfort and long-lasting makeup. The formula disclosed by the invention can greatly improve the sense of a user and endow the skin with better gloss.

Fig. 2 is a flowchart of a method for preparing a skin lightening cosmetic composition according to an embodiment of the present disclosure.

Specifically, a method for preparing a cosmetic composition for lightening skin color, comprising: (a) preparing a base component comprising an emulsifier, an emollient, a thickener, a film-forming agent, a colorant, a solvent, an electrolyte, a dispersant and a preservative; (b) pre-dispersing bismuth oxychloride into esters to form a uniform solution; (c) adding styrene-maleic anhydride copolymer into a uniform solution of bismuth oxychloride pre-dispersed in esters for high-speed dispersion; (d) adding triethoxy octyl silane coated mica, and performing ultrasonic treatment to obtain bismuth oxychloride-SMA-mica composite slurry; (e) uniformly adding a vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer; and (f) adding a fluorescent material containing quantum dots, and uniformly mixing to obtain the slurry compound.

Wherein components (a) - (f) of the particular composition have been described in detail in previous examples of the disclosure and are not repeated here.

step two, mixing the fluorescent material, resin and filler through mechanical stirring or ultrasonic oscillation to obtain a mixture;

In addition, the method for preparing the cosmetic composition for lightening skin color of the present disclosure further comprises:

adding (g) at least one vitamin component of vitamins B-E and/or (h) an amino acid component to the slurry complex obtained in step (f). The specific vitamin B-E and amino acid components have been described in detail in the preceding examples and will not be repeated here.

To sum up, compared with the prior art, the technical scheme of the present disclosure has the following beneficial effects:

the method can achieve the effect of naturally brightening skin color. Meanwhile, due to the synergistic effect of the compound composition, in the same formula, when the same brightening effect is achieved, the addition amount of the compound composition is far smaller than that of a single brightening substance, the addition of the quantum dot fluorescent material can improve the gloss and skin brightening durability of cosmetics, greatly improve the sense of a user, endow the skin with better gloss, and have higher market prospect.

The cosmetics obtained by adding the vitamin B-E components can inhibit bacteria, diminish inflammation and enhance the moisturizing function of skin, and simultaneously have the effects of resisting oxidation and promoting the healthy repair of the skin, and the vitamins can promote the generation and the activity of amino acid substances of the skin, so that the whole components are safe, non-irritant, non-toxic and free of side effects, the healthy state of the skin is effectively improved, and the skin care effect is better.

The foregoing shows and describes the general principles and features of the present disclosure, together with the advantages thereof. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims. The scope of the disclosure is defined by the appended claims and equivalents thereof. The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other embodiments in which any combination of the features described above or their equivalents does not depart from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims

1. A cosmetic composition for lightening skin color, comprising:

(b) triethoxyoctylsilane coated treated mica;

(c) pre-dispersing bismuth oxychloride in esters;

(d) styrene-maleic anhydride copolymers;

(e) vinyl dimethicone/methicone silsesquioxane crosspolymer; and

(f) a fluorescent material comprising quantum dots.

2. Cosmetic composition according to claim 1, characterized in that said emulsifier comprises cetyl PEG/PPG-10/1 dimethicone and/or polyglyceryl-2-diisostearate.

3. The cosmetic composition of claim 1, wherein said emollient comprises one or more of cyclopentadimethylsiloxane, isocetyl myristate, hydrogenated polyisobutene, ethylhexyl palmitate, cetyl ethylhexanoate, diethylhexyl carbonate, and glycerin.

4. Cosmetic composition according to claim 1, characterized in that the thickener comprises disteardimonium hectorite and/or the film former comprises trimethylsiloxysilicate and/or the dispersant comprises SN5040 or SN 5027.

5. The cosmetic composition according to claim 1, wherein the weight ratio of the triethoxyoctylsilane-coated mica to the bismuth oxychloride pre-dispersed in the ester in the composition is 3:7 to 7: 3.

6. The cosmetic composition as claimed in claim 1, wherein said triethoxyoctylsilane-coated mica has a particle size of not more than 20 μm, and said bismuth oxychloride predispersed in the ester has a particle size of not more than 20 μm.

7. The cosmetic composition according to claim 1, wherein the fluorescent material comprising quantum dots consists of quantum dots or of a composite of quantum dots and a non-quantum dot fluorescent material.

8. The cosmetic composition according to claim 7, wherein the quantum dots are nano semiconductor materials composed of one or more elements selected from carbon, silicon, germanium, tin, lead, cadmium, zinc, sulfur, selenium, tellurium, boron, aluminum, gallium, indium, nitrogen, phosphorus, arsenic and antimony, and the non-quantum dot fluorescent materials comprise rare earth fluorescent powder and/or organic fluorescent powder.

9. The cosmetic composition of claim 1, further comprising at least one of vitamin B-E and/or an amino acid component.

10. A method of preparing a skin lightening cosmetic composition comprising:

(b) pre-dispersing bismuth oxychloride into esters to form a uniform solution;