CN115177552A - Bionic skin cream capable of immediately covering wrinkles and preparation method thereof - Google Patents
Bionic skin cream capable of immediately covering wrinkles and preparation method thereof Download PDFInfo
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- CN115177552A CN115177552A CN202210807896.9A CN202210807896A CN115177552A CN 115177552 A CN115177552 A CN 115177552A CN 202210807896 A CN202210807896 A CN 202210807896A CN 115177552 A CN115177552 A CN 115177552A
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 58
- 239000002884 skin cream Substances 0.000 title claims abstract description 50
- 230000037303 wrinkles Effects 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
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- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 claims description 4
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- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims description 4
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
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- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
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- XNDVYJMKIJRDPF-UHFFFAOYSA-N tetrakis(prop-1-en-2-yl) silicate Chemical compound CC(=C)O[Si](OC(C)=C)(OC(C)=C)OC(C)=C XNDVYJMKIJRDPF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/89—Polysiloxanes
- A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/005—Preparations for sensitive skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/59—Mixtures
- A61K2800/592—Mixtures of compounds complementing their respective functions
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Birds (AREA)
- Epidemiology (AREA)
- Dermatology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a bionic skin cream for instantly covering wrinkles, which forms a bionic skin film on the surface of skin in situ, wherein the elastic modulus of the film is 0.4-2.0MPa under the strain of 20-40%; the elongation at break of the film is greater than 200%; the water vapor transmission rate of the film is 100-2000g/m2.24h; the bionic skin cream is a double-component instant wrinkle-covering bionic skin cream or a single-component instant wrinkle-covering skin bionic cream. The invention also discloses a preparation method of the two skin bionic creams for instantly covering the wrinkles. The present invention provides a viable solution for temporary smoothing of pouches and wrinkles due to skin laxity, and provides two-component and one-component formulation systems that may be more convenient for the user to use. The invention can provide a new idea for the long-acting skin care product with instant effect.
Description
Technical Field
The invention belongs to the fields of polymer chemistry and polymers, and particularly relates to a bionic skin cream capable of instantly covering wrinkles and a preparation method thereof.
Background
In recent years, with the rapid development of color value economy, the market scale of domestic cosmetics is continuously enlarged, and particularly the quantity of domestic cosmetics is obvious. By 2020, the market scale of the cosmetics industry reaches 5200 million yuan, and 10% of acceleration is predicted every year in the next 5 years, wherein the market scale of the skin care products is 2701 million yuan, and the market scale of the color cosmetics is 596 million yuan. At present, domestic cosmetic users are concentrated on the age of 31-40. However, for these mainstream users, the top 20 brands of make-up cosmetics occupy over 65% of the market, indicating a high market concentration and strong competition for new brands. On the other hand, 40+ users still have a large cosmetic demand, which accounts for about 15% of the overall market, but there are few cosmetics designed specifically for these older users on the market, especially for 50+ users, who (he) have an urgent need for cosmetics suitable for use, especially skin-tightening, high-efficacy anti-wrinkle products. For 50+ users (including 40+ users who are partially ill-maintained), their main problem is the sagging of the skin caused by natural aging, resulting in the development of significant wrinkles and under-eye bags, which have not been covered with ordinary makeup. Currently, to solve this problem, the user can only perform the repair by skin-pulling surgery, which is however expensive and is accompanied by serious sequelae.
A large number of researches show that high molecular polymers can be prepared into bionic skins by adjusting molecular weight and crosslinking density, and the materials are designed to be used for flexible electronics, wearable sensors and the like. Such as liquid metal composites, fibrous composites, collagen, cellulose, and the like. The regulation and control of the mechanical properties of the polymer and the conformity with the functionality are the key points of the current research. CN112606505A discloses a polyimide/hydrogel composite bionic skin which can be used as a base material of a wearable sensor; on the other hand, the similarity of the bionic skin and the real human skin can make the bionic skin have special application in the aspects of skin health and skin care. US20090220436A1 discloses a fluorinated polymer material which can be applied to the skin surface to form a film similar to the young skin of a human body, thereby achieving the effects of instant wrinkle removal and skin care. However, the use of the material is complicated, needs to be assisted by professionals, and is not suitable for consumers to use by themselves. Therefore, it is important to prepare a material for bionic young skin which is convenient to use.
Disclosure of Invention
The invention aims to provide the bionic skin cream for instantly covering wrinkles and the preparation method thereof, provides a feasible solution for temporarily smoothing pouches and wrinkles caused by skin looseness, and can provide a new idea for a long-acting skin care product with instant effect.
The technical scheme of the invention is as follows:
the invention is characterized in that the silicon rubber is used as the main component of the bionic skin, and the silicon rubber-based bionic skin with comfortable use feeling is obtained by a special emulsification process.
A large number of tests show that the silicone rubber can achieve the effects of smoothing wrinkles and comfort when the performance of the silicone rubber meets the following requirements: the elastic modulus is 0.4-2.0MPa under the strain of 20-40%; elongation at break of more than 200%; the water vapor transmission rate is 100-1000g/m 2 And 24h. However, since the mechanical properties of pure silicone rubber are weak, fumed silica is required for reinforcement, and the addition of a large amount of fumed silica increases the viscosity of the silicone rubber, which affects the comfort of use.
Therefore, the invention discloses a bionic skin cream for instantly covering wrinkles, which can form a bionic skin film on the surface of skin in situ, and the film has the following characteristics: (1) Mechanical properties (modulus of elasticity and elongation at break) similar to young skin; (2) a water vapor transmission rate similar to young skin; and (3) invisible on the skin surface in appearance.
The instant wrinkle-covering bionic skin cream is divided into addition type double-component instant wrinkle-covering bionic skin cream or condensation type single-component instant wrinkle-covering skin bionic cream due to different reaction mechanisms.
One is as follows: the invention relates to a double-component bionic skin cream for instantly covering wrinkles, which is developed on the basis of hydrosilylation reaction. Because the catalyst has high activity and can react with the base silicone rubber to generate a film immediately after being combined, the catalyst comprises two parts, namely an A component (silicone compound cream) and a B component (catalyst cream), when the A component and the B component are coated on the surface of the skin in sequence, a film simulating the young skin can be formed on the surface of the skin in a short time, and the film can be given unique tension due to the gradual volatilization of the volatile silicone oil component, so that wrinkles at the coated part can be smoothed. As shown in fig. 1, a schematic representation of a two-component biomimetic skin smoothing wrinkles.
Further, the organic silicon compound cream comprises vinyl polymethylsiloxane and modified polymers thereof, fumed silica, volatile silicone oil, water, a silicone-based emulsifier, a preservative and carbomer. The catalyst cream comprises a platinum catalyst, volatile silicone oil, water, a silicone-based emulsifier, an organosilicon thickener, a humectant and sodium chloride.
Further, the vinyl polydimethylsiloxane and the modified polymer thereof described in the present invention include a high molecular weight vinyl polymethylsiloxane and its modified polymer having a viscosity at 25 ℃ of 800 to 2500pa.s, a medium molecular weight vinyl polymethylsiloxane and its modified polymer having a viscosity at 25 ℃ of 50 to 100pa.s, and a low molecular weight vinyl polymethylsiloxane and its modified polymer having a viscosity at 25 ℃ of 0.1 to 1pa.s. The research shows that the vinyl polymethylsiloxane with various molecular weights can be used simultaneously, so that the material can obtain better comprehensive performance. Furthermore, the vinyl polydimethylsiloxane and the modified polymer thereof can be selected from one or more of vinyl-terminated polydimethylsiloxane and high-vinyl-content polymethylsiloxane.
Further, the volatile silicone oil is selected from one or more of decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane and polydimethylsiloxane of 0.65-2 cSt. For health and hygiene reasons, polydimethylsiloxanes of 0.65 to 2cSt are preferred, with 1cSt being most preferred.
Further, the platinum catalyst in the present invention may be selected from one or more of chloroplatinic acid catalyst and platinum catalyst of kast. Since the platinum catalyst kast has much higher activity than the chloroplatinic acid catalyst, the film formation time can be reduced, thereby improving the consumer's use impression, with the platinum catalyst kast being preferred and platinum divinyl dimethylsiloxane being most preferred. The concentration of the platinum catalyst is selected from 100-20000ppm. Preferably 1000 to 20000ppm.
Furthermore, the humectant is selected from one or more of butanediol, propylene glycol and glycerol.
Secondly, the single-component instant wrinkle-masking bionic skin cream is developed based on condensation reaction, and compared with a double-component cream, the single-component cream is more convenient and fast to use. The condensation reaction, namely the condensation type silica gel, can hydrolyze when encountering water vapor in the air, thereby initiating the polymerization reaction of the silicone rubber, and the polymerization reaction does not occur under the anhydrous condition. Because of the need for moisture catalysis, the curing process for condensation-type silicone rubbers typically starts from the surface, while the internal cure is slower. However, the film formed by the bionic skin cream of the invention needs to be less than 100 microns in thickness for comfort and appearance requirements (the film formed by the two-component bionic skin cream is also less than 100 microns in thickness), so that the solidification can be considered to be completed simultaneously, which lays a foundation for manufacturing the single-component bionic skin cream.
The single-component instant wrinkle-masking bionic skin cream is smeared on the surface of skin, and can form a layer of film of bionic young skin on the surface of the skin in a short time when meeting moisture in the air, so that wrinkles of the smeared part are smoothed, as shown in figure 2.
Further, the one-component immediate wrinkle-masking skin biomimetic cream comprises hydroxy polydimethylsiloxane, volatile silicone oil, fumed silica, a cross-linking agent, a catalyst, a solvent, a preservative, octadecanol and a silicone-based emulsifier.
Furthermore, the hydroxyl polydimethylsiloxane of the invention at least comprises a high molecular weight hydroxyl polydimethylsiloxane with the viscosity range of 60-500Pa.s at 25 ℃ and at least one low molecular weight hydroxyl polydimethylsiloxane with the viscosity range of 2-20Pa.s at 25 ℃. High molecular weight hydroxy polydimethylsiloxanes with a 25 ℃ viscosity of 150Pa.s and low molecular weight hydroxy polydimethylsiloxanes with a 25 ℃ viscosity in the range of 2.5Pa.s are preferred. Through the compounding of molecular weight, the silicone rubber film with balanced elasticity and modulus can be obtained after reaction.
Further, the volatile silicone oil is selected from one or more of decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane and polydimethylsiloxane of 0.65-2 cSt. For health and hygiene reasons, polydimethylsiloxanes of 0.65 to 2cSt are preferred, with 1cSt being most preferred.
Furthermore, the crosslinking agent of the invention is a multifunctional silane compound containing a hydrolyzable group, which can be hydrolyzed when meeting moisture in the air, so that the crosslinking agent reacts with hydroxy polydimethylsiloxane to generate a crosslinked polydimethylsiloxane crosslinked polymer under the action of a catalyst. Can be selected from dealcoholized silane compounds or dealkylated alkyl compounds. Among them, the deacetonized alkyl compound is preferable because the reaction speed is higher. The deacetonized alkyl compound is RSi (OC = CH) 2 ) 3 R is an alkane or aromatic hydrocarbon group such as methyl, ethyl and the like. Most preferred are methyltris (isopropenyloxy) silane and tetrakis (isopropenyloxy) silane.
Furthermore, the catalyst of the invention is a substance capable of accelerating condensation polymerization of condensation type silicone rubber, and is selected from one or more of titanate and chelate thereof, preferably isopropyl titanate, n-butyl titanate and chelate thereof for safety. Most preferably isopropyl titanate.
Furthermore, the solvent is a liquid which is not dissolved in the polydimethylsiloxane, is used as a dispersed phase of the cream, and is selected from one or more of ethanol, glycerol, propylene glycol and butanediol.
The instant wrinkle-covering bionic skin cream needs to meet the following requirements: the film obtained in (1) has a required mechanical strength. (2) The cream has stability, and thus, the various components are required to be in proper proportions.
For the double-component bionic skin cream for instantly covering wrinkles, the component A preferably comprises (by mass percentage) 2-5wt% of high molecular weight polydimethylsiloxane and modified polymers thereof, 10-30wt% of medium molecular weight polydimethylsiloxane and modified polymers thereof, 3-10wt% of low molecular weight polydimethylsiloxane and modified polymers thereof, 10-25wt% of fumed silica, 10-20wt% of volatile silicone oil, 10-50wt% of water, 2-4wt% of silicone-based emulsifier, 0.1-0.5wt% of preservative and 0.2-1wt% of carbomer. More preferably, the component B comprises (by mass percent) 5-20wt% of organosilicon thickening agent, 20-40wt% of water, 2-4wt% of silicone-based emulsifier, 20-40wt% of humectant, 10-20wt% of volatile silicone oil, 0.5-2wt% of platinum catalyst and 0.5-1wt% of sodium chloride.
For the one-component immediate wrinkle-masking bionic skin cream, the one-component immediate wrinkle-masking bionic skin cream preferably comprises (by mass percent) 3-9wt% of high molecular weight hydroxy polydimethylsiloxane, 12-36wt% of low molecular weight hydroxy polydimethylsiloxane, 10-20wt% of volatile silicone oil, 10-25wt% of fumed silica, 4-12wt% of cross-linking agent, 0.5-2wt% of catalyst, 10-50wt% of solvent, 4-10wt% of octadecanol, 0.1-0.5wt% of preservative and 2-4wt% of silicone-based emulsifier. In order to achieve a suitable film-forming thickness, the content of a film-forming component such as polydimethylsiloxane may be appropriately increased.
The invention also provides a preparation method of the cream, wherein the component A of the double-component bionic skin cream for instantly covering wrinkles adopts a pre-blending emulsification method, and the component B of the double-component bionic skin cream for instantly covering wrinkles adopts a direct emulsification method. The single-component instant wrinkle-masking bionic skin cream also uses a premixing emulsification method, but the processing process is anhydrous, specifically as the anhydrous premixing emulsification method.
Pre-blending emulsification method: and (2) placing the polydimethylsiloxane, the modified polymer thereof, the volatile silicone oil and the 1/2 fumed silica in a planetary stirrer, stirring uniformly at the speed of 60 revolutions per second at room temperature, then adding the rest 1/2 fumed silica, stirring uniformly at the speed of 60 revolutions per second at room temperature, and finally stirring in vacuum to remove bubbles to obtain the pre-blend. And (2) at room temperature, uniformly stirring the pre-blend, the volatile silicone oil and the silicone-based emulsifier to form an oil phase, and then slowly adding a water phase consisting of water, a preservative and carbomer into the rapidly stirred oil phase until a uniform cream is formed, thus obtaining the component A.
The direct emulsification method comprises the following steps: at room temperature, uniformly stirring the organosilicon thickener, the siloxane-based emulsifier, the volatile silicone oil and the platinum catalyst to form an oil phase, adding the oil phase into an emulsification homogenizer, and slowly adding the water phase consisting of water, the humectant and sodium chloride into the oil phase until uniform gel is formed to obtain the component B. The A component and the B component jointly form the double-component bionic skin cream with instant effect, and when the A component and the B component are sequentially smeared on the surface of the skin, a layer of film of bionic young skin can be formed on the surface of the skin in a short time.
Anhydrous pre-blending emulsification method: the hydroxyl polydimethylsiloxane, the cross-linking agent and the fumed silica are all treated in an oven at 80 ℃ for 24 hours, and the moisture is removed. Putting hydroxyl polydimethylsiloxane and 1/2 fumed silica into a planetary stirrer, stirring uniformly at the speed of 60 revolutions per second at room temperature under vacuum, then adding the rest 1/2 fumed silica, and stirring uniformly at the speed of 60 revolutions per second at room temperature under vacuum to obtain a pre-blend. And (2) uniformly stirring the pre-blend, the volatile silicone oil, the silicone-based emulsifier and the catalyst at room temperature under vacuum to form an oil phase, and then slowly adding a solvent phase consisting of the solvent, the preservative and the octadecanol into the rapidly stirred oil phase until a uniform cream is formed, thus obtaining the single-component instant wrinkle-masking bionic skin cream.
The equipment used in the above-described production method of the present invention is conventional in the art. The starting materials and reagents described in the present invention are commercially available unless otherwise specified.
Compared with the prior art, the invention has the following beneficial effects: a bionic young skin cream is prepared, and a feasible solution is provided for temporarily smoothing eye bags and wrinkles caused by skin looseness. And two-component and single-component formula systems are provided, so that the use is more convenient for users. By the method, a new idea can be provided for the long-acting skin care product with instant effect.
Drawings
Fig. 1 is a schematic illustration of a two-component biomimetic skin smoothing wrinkle;
figure 2 is a schematic of single component biomimetic skin smoothing wrinkles.
Detailed Description
The invention is further illustrated by the following examples and figures, which are only intended to provide a better understanding of the content of the invention. Therefore, the examples of the present invention do not limit the scope of the present invention.
The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out under conventional conditions or conditions recommended by the manufacturers.
The room temperature is the temperature of an operating room and is 10-30 ℃.
Example 1
Product component A formula
| Serial number | Chinese name of raw material | Percentage of |
| 1 | Vinyl Silicone rubber 110-adhesion 1050Pa.s | 5％ |
| 2 | Vinyl silicone oil-viscosity 65Pa.s | 30％ |
| 3 | Vinyl Silicone oil-viscosity 0.5Pa.s | 7％ |
| 4 | Silicon dioxide | 22％ |
| 5 | Organosilicon emulsifier | 4％ |
| 6 | Water (W) | 19％ |
| 7 | Polydimethylsiloxane-viscosity 2Cs | 12％ |
| 8 | Carbomer | 0.5％ |
| 9 | Preservative agent | 0.5％ |
Product component B formula
| Serial number | Chinese name of raw materials | Percentage of |
| 1 | Organosilicon thickener DC9045 | 15％ |
| 2 | Organic silicon emulsifier | 4％ |
| 3 | Kasith platinum catalyst (2%) | 1％ |
| 4 | Water (W) | 37％ |
| 5 | Sodium chloride | 0.5％ |
| 6 | Butanediol | 4％ |
| 7 | Propylene glycol | 22％ |
| 8 | Glycerol | 6％ |
| 9 | Polydimethylsiloxane-viscosity 2Cs | 10％ |
| 10 | Rose flowerOil | 0.5％ |
And (2) placing the vinyl silicone oil and the 1/2 silicon dioxide into a planetary stirrer, stirring at the speed of 60 revolutions per second at room temperature until the mixture is uniform, then adding the rest 1/2 silicon dioxide, stirring at the speed of 60 revolutions per second at room temperature until the mixture is uniform, and finally stirring in vacuum to remove bubbles to obtain the pre-blend. Then, at room temperature, uniformly stirring the pre-blend, the polydimethylsiloxane-viscosity 2cs and the silicone-based emulsifier to form an oil phase, and then slowly adding a water phase consisting of water, a preservative and carbomer into the rapidly stirred oil phase until a uniform cream is formed to obtain the component A.
At room temperature, uniformly stirring an organic silicon thickening agent, a silicone-based emulsifier, polydimethylsiloxane-viscosity 2cs, a platinum catalyst and rose oil to form an oil phase, adding the oil phase into an emulsifying homogenizer, and slowly adding a water phase consisting of water, propylene glycol, butanediol, glycerol and sodium chloride into the oil phase until uniform gel is formed to obtain a component B. The obtained material has film forming time of 1.5min, tensile elongation at break of 680%, modulus of 10-40% strain of 0.78MPa, and water vapor transmission rate of 520g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effect is enhanced for 5 hours, the skin feel is good after the eye cream is smeared, and the use part has stronger tight feeling. Specific results are shown in table 1.
Example 2
The same procedure as in example 1, wherein the polydimethylsiloxane-viscosity 2cs is completely replaced by a disiloxane, the other raw materials, proportions and production method being unchanged. The obtained material has film forming time of 1.5min, tensile elongation at break of 635%, modulus of 10-40% strain of 0.75MPa, and water vapor transmission rate of 620g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effect is enhanced for 2 hours, the skin feel is good after the eye cream is smeared, and the use part has stronger tight feeling. Specific results are shown in table 1.
Example 3
The procedure of example 1 is followed, substituting 12% polydimethylsiloxane-viscosity 2cs for 6% in the formulation of component ADimethyl silicone oil-350 cs and 6% dimeric siloxane-0.65 cs, and other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 1.5min, tensile elongation at break of 750%, modulus of strain 10-40% of 0.48MPa, and water vapor transmission rate of 1896g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effect is enhanced for 3 hours, the skin feel is good after the eye cream is smeared, and the use part has slight tightness. Specific results are shown in table 1.
Example 4
The method of example 1 wherein the amount of platinum catalyst Kansted (2%) in the formulation of component B was increased from 1% to 2% and the water was reduced from 37% to 36%; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 0.5min, tensile elongation at break of 586%, modulus of 10-40% strain of 0.82MPa, and water vapor transmission rate of 480g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effect is strengthened for 5 hours, the skin feel is good after the eye cream is smeared, and the use part has stronger tight feeling. Specific results are shown in table 1.
Example 5
The same procedure as in example 1 was used, wherein 5% vinyl silicone rubber 110-adhesion 1050Pa.s,30% vinyl silicone oil-viscosity 65Pa.s,7% vinyl silicone oil-viscosity 0.5Pa.s in the formulation of component A were replaced with 2% vinyl silicone rubber 110-adhesion 1050Pa.s,30% vinyl silicone oil-viscosity 65Pa.s, and 10% vinyl silicone oil-viscosity 0.5Pa.s. Other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 1.5min, tensile elongation at break of 780%, modulus of strain 10-40% of 0.68MPa, and water vapor transmission rate of 796g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 4 hours, the skin feel is good after the eye cream is smeared, and the use part has stronger tight feeling. Specific results are shown in table 1.
Example 6
| Serial number | Chinese name of raw material | Percentage of |
| 1 | High molecular weight hydroxy polydimethylsiloxane-160Pa.s | 6％ |
| 2 | Low molecular weight hydroxy polydimethylsiloxane-10Pa.s | 24.5％ |
| 3 | Polydimethylsiloxane-2 cs | 10％ |
| 4 | Fumed silica | 19％ |
| 5 | Methyltris (isopropenyloxy) silane | 4.6％ |
| 6 | Titanium acid isopropyl ester | 2％ |
| 7 | Glycerol | 4.3％ |
| 8 | Propylene glycol | 15.9％ |
| 9 | Butanediol | 5.2％ |
| 10 | Octadecanol | 4％ |
| 11 | Xinxian Ketone | 0.5％ |
| 12 | Organic silicon emulsifier | 4％ |
The hydroxyl polydimethylsiloxane and the fumed silica are both treated in an oven at 80 ℃ for 24 hours, and the moisture is removed. Putting hydroxyl polydimethylsiloxane, methyl tri (isopropenyloxy) silane and 1/2 fumed silica into a planetary stirrer, stirring uniformly at the speed of 60 revolutions per second under vacuum at room temperature, then adding the rest 1/2 fumed silica, and stirring uniformly at the speed of 60 revolutions per second under vacuum at room temperature to obtain a pre-blend. Uniformly stirring the pre-blend, the polydimethylsiloxane-2 Cs, the silicon-based emulsifier and the isopropyl titanate at room temperature under vacuum to form an oil phase, and then slowly adding a solvent phase consisting of propylene glycol, butanediol, glycerol, fragrant fresh ketone and octadecanol into the rapidly stirred oil phase until a uniform cream is formed, thus obtaining the product.
The obtained material can react to form a film under the action of water vapor in the air. The film forming time is 5min, the tensile elongation at break is 488%, the modulus of the strain of 10-40% is 0.56MPa, and the water vapor transmission rate is 1250g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effect is enhanced for 4 hours, the skin feel is good after the eye cream is smeared, and the use part has slight tightness. Specific results are shown in table 1.
Example 7
The process of example 6, wherein the isopropyl titanate content is reduced from 2% to 1% and the propylene glycol is increased from 15.9% to 16.9%; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 9min, tensile elongation at break of 523%, modulus of 10-40% strain of 0.48MPa, and water vapor transmission rate of 1580g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 4 hours, the skin feel is good after the eye cream is smeared, and the use part feels slightly tight. Specific results are shown in table 1.
Example 8
The same procedure as in example 6, wherein the methicone-2 cs was completely replaced with the dimeric silane-0.65 cs; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 5min, tensile elongation at break of 456%, modulus of 10-40% strain of 0.53MPa, and water vapor transmission rate of 1380g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 2 hours, the skin feel is good after the eye cream is smeared, and the use part feels slightly tight. Specific results are shown in table 1.
Example 9
The same procedure as in example 6, wherein methyltrimethoxysilane completely replaced methyltris (isopropenoxy) silane; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 15min, tensile elongation at break of 460%, modulus of 10-40% strain of 0.46MPa, and water vapor transmission rate of 1890g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 4 hours, the skin feel is good after the eye cream is smeared, and the use part feels slightly tight. Specific results are shown in table 1.
TABLE 1
Comparative example 1
Product component A formula
| Serial number | Chinese name of raw material | Percentage of |
| 1 | Vinyl Silicone rubber 110-adhesion 1050Pa.s | 7％ |
| 2 | Vinyl silicone oil-viscosity 65Pa.s | 42.2％ |
| 3 | Vinyl Silicone oil viscosity 0.5Pa.s | 9.8％ |
| 4 | Silicon dioxide | 31％ |
| 5 | Polydimethylsiloxane-2 Cs | 10％ |
Product component B formula
| Serial number | Chinese name of raw material | Percentage of |
| 1 | Kasith platinum catalyst (2%) | 2％ |
| 2 | Polydimethylsiloxane-2 Cs | 98％ |
The preparation of component A and component B was carried out in the same manner as in example 1, but without the emulsification process. The other polymer ratios and the catalyst concentrations were not changed. The obtained material has film forming time of 1.5min, tensile elongation at break of 690%, modulus of strain 10-40% of 0.80MPa, and water vapor transmission rate of 590g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 6 hours, the skin feel is poor after the eye cream is smeared, and the use part has strong tightness. The specific results are shown in Table 2.
Comparative example 2
The same procedure as in example 1, wherein the amount of platinum catalyst Kansted in the formulation of component B was reduced from 2% to 0% and propylene glycol was increased from 15.9% to 17.9%; other raw materials, proportion and production method are unchanged. The resulting material was unable to form a solid film. After the eye mask is used, fine lines on eyes do not change obviously, the skin feel is good after the eye mask is smeared, and the use part does not have tight feeling. Specific results are shown in Table 2.
Comparative example 3
The same procedure as in example 1, wherein 5% vinyl silicone rubber 110-adhesion 1050Pa.s,30% vinyl silicone oil-viscosity 65Pa.s, and 7% vinyl silicone oil-viscosity 0.5Pa.s in the formulation of component A were all replaced with 42% vinyl silicone oil-viscosity 0.5Pa.s; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 1.5min, tensile elongation at break of 200%, modulus of 10-40% strain of 0.35MPa, and water vapor transmission rate of 560g/m 2 And 24h. After use, the fine lines of the eyes are not obviousHas obvious change, strong effect time of 0h, good skin feeling after being smeared and stronger tense feeling of the using part. The specific results are shown in Table 2.
Comparative example 4
The same procedure as in example 1, wherein polydimethylsiloxane-2 cs was replaced in the formulations of Components A and B entirely by polydimethylsiloxane-350 cs; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 1.5min, tensile elongation at break of 540%, modulus of strain 10-40% of 0.22MPa, and water vapor transmission rate of 3950g/m 2 And 24h. After the eye mask is used, fine lines on eyes do not change obviously, the effect time is 0 hour, the skin feeling is good after the eye mask is smeared, and no tight feeling is caused on the using part. Specific results are shown in Table 2.
Comparative example 5
| Serial number | Chinese name of raw material | Percentage of |
| 1 | High molecular weight hydroxy polydimethylsiloxane-160Pa.s | 10.9％ |
| 2 | Low molecular weight hydroxy polydimethylsiloxane-10Pa.s | 40.8％ |
| 3 | Polydimethylsiloxane-2 Cs | 10％ |
| 4 | Fumed silica | 31.7％ |
| 5 | Methyltris (isopropenyloxy) silane | 4.6％ |
| 6 | Titanium acid isopropyl ester | 2％ |
Sample preparation was carried out as in example 6, but without the emulsification process. The other polymer ratios and the catalyst concentrations were not changed. The film forming time is 5min, the elongation at break is 524%, the modulus of 10-40% strain is 0.52MPa, and the water vapor transmission rate is 1620g/m 2 And 24h. After the eye cream is used, fine wrinkles on eyes are obviously reduced, the effective time is 4 hours, the skin feel is poor after the eye cream is smeared, and the use part feels slightly tight. The specific results are shown in Table 2.
Comparative example 6
The same procedure as in example 6, wherein polydimethylsiloxane-2 cs was entirely replaced with polydimethylsiloxane-350 cs; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 5min, tensile elongation at break of 620%, modulus of 10-40% strain of 0.16MPa, and water vapor transmission rate of 4250g/m 2 And 24h. After the eye mask is used, fine lines on eyes do not change obviously, the effect time is 0 hour, the skin feeling is good after the eye mask is smeared, and no tight feeling is caused on the using part. The specific results are shown in Table 2.
Comparative example 7
The same procedure as in example 6, wherein the isopropyl titanate content is reduced from 2% to 0% and the propylene glycol content is increased from 15.9% to 17.9%; other raw materials, proportion and production method are unchanged. The resulting material was not film-forming. After the eye cream is used, fine lines of eyes are not obviously changed, the effective time is 0 hour, the skin feel is good after the eye cream is smeared, and the used parts have no tight feeling. The specific results are shown in Table 2.
Comparative example 8
The same procedure as in example 6, wherein 6% of high molecular weight hydroxypolydimethylsiloxane-160Pa.s and 24.5% of low molecular weight hydroxypolydimethylsiloxane-10Pa.s were replaced with 30.5% of low molecular weight hydroxypolydimethylsiloxane-10Pa.s; other raw materials, proportion and production method are unchanged. The obtained material has film forming time of 6min, tensile elongation at break of 267%, modulus of 10-40% strain of 0.42MPa, and water vapor transmission rate of 625g/m 2 And 24h. After the eye cream is used, fine lines of eyes are not obviously changed, the effective time is 0 hour, the skin feel is good after the eye cream is smeared, and the used parts have no tight feeling. The specific results are shown in Table 2.
TABLE 2
In combination with the above embodiments and comparative examples, it can be seen that:
examples 1-5 and examples 6-9 are a two-component immediate wrinkle-masking biomimetic skin cream and a one-component immediate wrinkle-masking biomimetic skin cream, respectively, both meeting the performance requirements set forth in the claims from the experimental data: 1. mechanical properties similar to human young skin; 2. invisible thin films caused by in-situ film formation; 3. the water vapor transmission rate is similar to that of young skin, and the skin is comfortable and breathable. The double-component bionic skin cream capable of instantly covering wrinkles has higher film-forming performance due to higher activity of a used catalyst, but has higher use difficulty due to the double-component design. The instant wrinkle-covering bionic skin cream designed by a single component is more convenient to use, but the activity of the catalyst is lower, so that the film forming time is longer. Therefore, the two bionic skin creams disclosed in the embodiment have the advantages and the disadvantages, and the variety can be determined according to the specific market demand.
The skin feel of the application of the cosmetic product directly affects the consumer experience of the user, and therefore, the use of an emulsification process is essential. The experimental data comparing example 1 and comparative example 1, example 6 and comparative example 5 show that: the skin feeling of smearing is greatly improved by the emulsification process, and other performance indexes are not changed greatly.
The invention is a precondition for achieving the effect by forming the bionic film with proper mechanical property. The catalyst plays an important role in the catalyst, and when the conditions of comparative examples 2 and 7 are not changed, the catalyst is not added, and the result shows that the biomimetic film can not be formed under the condition of no catalyst; however, the activity and the dosage of the catalyst only change the film forming time of the bionic skin and have little influence on the mechanical performance as can be seen from the examples 1 and 4 and the examples 6 and 7; in addition, the mechanical property of the bionic film is related to the cross-linking density of the bionic film, and the cross-linking density is regulated and controlled by reasonably compounding high-molecular-weight silicone oil monomers and low-molecular-weight silicone oil monomers. It can be seen from examples 1 and 5 and comparative example 3 that the high and low molecular weight silicone oil monomers are compounded in a certain proportion to exhibit better tensile elasticity and strength, while the low molecular weight silicone oil monomer alone exhibits poorer tensile elasticity and strength.
Claims (10)
1. The bionic skin cream is characterized in that a bionic skin film is formed on the surface of the skin in situ, and the elastic modulus of the film is 0.4-2.0MPa under the strain of 20-40%; the elongation at break of the film is greater than 200%; the water vapor transmission rate of the film is 100-2000g/m 2 24h; the bionic skin cream is a double-component bionic skin cream for instantly covering wrinkles or a single-component bionic skin cream for instantly covering wrinkles.
2. The immediate wrinkle masking biomimetic skin cream as in claim 1, wherein the two-component immediate wrinkle masking biomimetic skin cream comprises a component A and a component B, when the component A and the component B are applied on the skin surface in sequence, a layer of film of biomimetic young skin is formed on the skin surface in a short time, so that wrinkles at the applied part are smoothed;
the component A is organosilicon compound cream, and the component B is catalyst cream.
3. The immediate wrinkle reduction biomimetic skin cream as claimed in claim 2, wherein the silicone composite cream comprises vinyl methicone and its modified polymers, fumed silica, volatile silicone oil, water, silicone-based emulsifier, preservative and carbomer; the catalyst cream comprises a platinum catalyst, volatile silicone oil, water, a silicone-based emulsifier, an organosilicon thickener, a humectant and sodium chloride.
4. The immediate wrinkle reduction biomimetic skin cream as claimed in claim 3, wherein said vinyl methicone and its modified polymers include high molecular weight vinyl methicone and its modified polymers, viscosity at 25 ℃ ranging from 800 to 2500Pa.s, medium molecular weight vinyl methicone and its modified polymers, viscosity at 25 ℃ ranging from 50 to 100Pa.s, and low molecular weight vinyl methicone and its modified polymers, viscosity at 25 ℃ ranging from 0.1 to 1Pa.s; the volatile silicone oil is one or more of decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane and polydimethylsiloxane of 0.65-2 cSt; the platinum catalyst is one or more of chloroplatinic acid catalyst and Kanst platinum catalyst, wherein the concentration of the platinum catalyst is 100-20000ppm; the humectant is one or more of butanediol, propylene glycol and glycerol.
5. The immediate wrinkle masking biomimetic skin cream according to any of claims 2-4, wherein the A component comprises 2-5wt% of high molecular weight polydimethylsiloxane and its modified polymer, 10-30wt% of medium molecular weight polydimethylsiloxane and its modified polymer, 3-10wt% of low molecular weight polydimethylsiloxane and its modified polymer, 10-25wt% of fumed silica, 10-20wt% of volatile silicone oil, 10-50wt% of water, 2-4wt% of silicone-based emulsifier, 0.1-0.5wt% of preservative, 0.2-1wt% of carbomer;
the component B comprises 5-20wt% of an organosilicon thickening agent, 20-40wt% of water, 2-4wt% of a silicone-based emulsifier, 20-40wt% of a humectant, 10-20wt% of volatile silicone oil, 0.5-2wt% of a platinum catalyst and 0.5-1wt% of sodium chloride.
6. A preparation method of a bionic skin cream for instantly covering wrinkles is characterized in that a pre-blending emulsification method is selected as a component A of the double-component bionic skin cream for instantly covering wrinkles, and a direct emulsification method is used as a component B;
pre-blending emulsification method: putting vinyl polymethylsiloxane and modified polymers thereof, volatile silicone oil and 1/2 fumed silica into a planetary stirrer, stirring at room temperature until the mixture is uniform, then adding the remaining 1/2 fumed silica, stirring at room temperature until the mixture is uniform, and finally stirring in vacuum to remove bubbles to obtain a pre-blend; at room temperature, uniformly stirring the pre-blend, the volatile silicone oil and the silicone-based emulsifier to form an oil phase, and then slowly adding a water phase consisting of water, a preservative and carbomer into the rapidly stirred oil phase until a uniform cream is formed to obtain a component A;
the direct emulsification method comprises the following steps: at room temperature, uniformly stirring the organosilicon thickener, the siloxane-based emulsifier, the volatile silicone oil and the platinum catalyst to form an oil phase, adding the oil phase into an emulsification homogenizer, and slowly adding the water phase consisting of water, the humectant and sodium chloride into the oil phase until uniform gel is formed to obtain the component B.
7. The immediate wrinkle masking biomimetic skin cream as in claim 1, wherein said one-component immediate wrinkle masking biomimetic skin cream is applied to the skin surface and forms a thin film of biomimetic young skin on the skin surface in a short time when encountering moisture in the air, thereby smoothing out wrinkles at the applied site;
the single-component instant wrinkle-masking skin bionic cream comprises hydroxy polydimethylsiloxane, volatile silicone oil, fumed silica, a cross-linking agent, a catalyst, a solvent, a preservative, octadecanol and a silicone-based emulsifier.
8. The immediate wrinkle reduction biomimetic skin cream as in claim 7, wherein said hydroxy polydimethyl siloxane comprises high molecular weight hydroxy polydimethyl siloxane having a viscosity at 25 ℃ in the range of 60 to 500pa.s, and low molecular weight hydroxy polydimethyl siloxane having a viscosity at 25 ℃ in the range of 2 to 20pa.s;
the volatile silicone oil is one or more of decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane and siloxane oligomer of 0.65-2 cSt;
the cross-linking agent is a hydrolyzable group-containing multifunctional silane compound, and is one or two of dealcoholized silane compound and dealacetone alkyl compound;
the catalyst is titanate and a chelate thereof, and is one or more of isopropyl titanate, n-butyl titanate and a chelate thereof;
the solvent is one or more of ethanol, glycerol, propylene glycol and butanediol.
9. The immediate wrinkle masking biomimetic skin cream as claimed in claim 7 or 8, wherein the one-component immediate wrinkle masking biomimetic skin cream comprises 3-9wt% of high molecular weight hydroxypolydimethylsiloxane, 12-36wt% of low molecular weight hydroxypolydimethylsiloxane, 10-20wt% of volatile silicone oil, 10-25wt% of fumed silica, 4-12wt% of cross-linking agent, 0.5-2wt% of catalyst, 10-50wt% of solvent, 4-10wt% of octadecanol, 0.1-0.5wt% of preservative, 2-4wt% of silicone based emulsifier.
10. The preparation method of the bionic skin cream capable of instantly covering wrinkles is characterized in that the single-component bionic skin cream capable of instantly covering wrinkles is prepared by adopting an anhydrous pre-blending emulsification method:
treating hydroxy polydimethylsiloxane, a cross-linking agent and fumed silica in an oven at 80 ℃ for 24 hours to remove moisture; putting hydroxyl polydimethylsiloxane, a cross-linking agent and 1/2 fumed silica into a planetary stirrer, stirring at room temperature under vacuum to be uniform, then adding the rest 1/2 fumed silica, and stirring at room temperature under vacuum to be uniform to obtain a pre-blend; and (2) uniformly stirring the pre-blend, the volatile silicone oil, the silicone-based emulsifier and the catalyst at room temperature under vacuum to form an oil phase, and then slowly adding a solvent phase consisting of the solvent, the preservative and the octadecanol into the rapidly stirred oil phase until a uniform cream is formed, thus obtaining the single-component instant wrinkle-masking bionic skin cream.
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| CN1956701A (en) * | 2004-05-24 | 2007-05-02 | 宝洁公司 | Translucent cosmetic foundation |
| CN103153279A (en) * | 2010-08-31 | 2013-06-12 | 生活实验公司 | Skin compositions and methods of use thereof |
| CN109475758A (en) * | 2016-08-03 | 2019-03-15 | 美国陶氏有机硅公司 | Cosmetic composition comprising cured organosilicon material |
| CN106668937A (en) * | 2016-12-16 | 2017-05-17 | 深圳市茵冠生物科技有限公司 | Bionic skin and preparation method thereof |
| US20210361556A1 (en) * | 2018-03-09 | 2021-11-25 | Lg Household & Health Care Ltd. | Agent for forming film on skin |
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