Lip exfoliating scrub cream and preparation method thereof

Abstract

The invention discloses a lip exfoliating scrub cream, which is prepared from the following ingredients in parts by weight: 0.5 to 1.5 parts of grape (VITIS VINIFERA) seed oil, 0.5 to 1.5 parts of olea europaea (OLEA EUROPAEA) fruit oil, 0.05 to 0.15 part of tocopheryl acetate, 0.001 to 0.005 part of sodium hyaluronate, 0.1 to 0.3 part of bisabolol, 25 to 55 parts of emollient, 1 to 5 parts of wax thickening agents, 0.1 to 3 parts of preservatives, 3 to 5 parts of walnut (JUGLANS REGIA) shell powder, 40 to 60 parts of cane sugar and 0.1 to 0.5 part of essence. According to the lip exfoliating scrub cream provided by the invention, the walnut shell powder and the cane sugar are adopted as the compound abrasive, and the abrasive with different particle sizes has a synergistic effect, so that dead skin of lips can be more effectively removed, meanwhile, the excessive irritation of a single abrasive with a large particle size to the lip skin is avoided, the pain is reduced, and the use experience is improved.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, specifically to a lip exfoliating scrub and its preparation method. Background Technology

[0002] The lips are an extension of the facial skin, connected to the mucous membrane inside the mouth. Their stratum corneum is thinner than that of normal skin, and they lack sweat glands, sebaceous glands, hair follicles, and other organs. Because the lips are constantly exposed to the outside world, they easily lose moisture when in contact with air, leading to dryness, cracking, and peeling.

[0003] With the development of beauty products, the demand for lip care products is increasing. Applying lip balm directly only moisturizes the skin and doesn't effectively remove the dead skin cells from the lips. Pre-applying a lip scrub and massaging it in effectively removes dead skin while also moisturizing. Currently, there are relatively few lip exfoliating products on the market. Most use sucrose as an abrasive, but because sucrose particles are relatively large, they can cause pain on sensitive lips during exfoliation, resulting in a poor experience. Furthermore, their ability to remove dead skin is weak, affecting the smoothness and appearance of subsequent lipstick and lip gloss application. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of irritation to the lip skin and poor exfoliation effect of existing lip exfoliating products, and to provide a lip exfoliating scrub and its preparation method.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] The first aspect of this invention provides a lip exfoliating scrub, comprising the following components by weight: 0.5-1.5 parts grape (VITIS VINIFERA) seed oil, 0.5-1.5 parts olive (OLEAEUROPAEA) fruit oil, 0.05-0.15 parts tocopheryl acetate, 0.001-0.005 parts sodium hyaluronate, 0.1-0.3 parts bisabolol, 25-55 parts emollient, 1-5 parts wax thickener, 0.1-3 parts preservative, 3-5 parts walnut (JUGLANS REGIA) shell powder, 40-60 parts sucrose, and 0.1-0.5 parts fragrance.

[0007] Since the skin on the lips is in close contact with the oral mucosa, existing lip scrub products generally use sugar as an abrasive, which provides a relatively pleasant experience and the ingredients are safer and gentler. However, because sucrose particles are relatively large, they can cause pain to sensitive lips during exfoliation, resulting in a poor experience. Furthermore, their ability to remove dead skin is relatively weak, affecting the smoothness and aesthetic effect of subsequent application of lipstick and lip gloss.

[0008] In this invention, the inventors selected sucrose combined with walnut (Juglans reggae) shell powder as an abrasive. The walnut (Juglans reggae) shell powder is naturally derived and biodegradable, with a smaller particle size than sucrose, allowing it to penetrate deep into the crevices of the lips (approximately 20-50 μm) to remove fine dead skin. The larger particle size of sucrose removes rough dead skin from the surface of the lips. The combination of the two increases the dead skin removal rate by more than 30%. Secondly, walnut shell powder has a relatively brittle texture and moderate hardness, reducing skin irritation. Furthermore, walnut shell powder has a low density and a certain porosity, resulting in good adsorption properties. Therefore, during friction with the skin, it can adsorb fine dead skin, improving the effectiveness of dead skin removal.

[0009] In this invention, bisabolol possesses anti-inflammatory and antibacterial properties, soothes the skin, promotes wound healing and skin metabolism, and enhances the skin's resistance to irritation. Grape seed oil and olive fruit oil not only replenish stratum corneum lipids, improve skin barrier function, and enhance moisturizing, but also have antioxidant effects. Furthermore, the combination of these two plant oils significantly improves the moisturizing effect and skin feel of the scrub. Tocopheryl acetate is an antioxidant, providing antioxidant benefits, moisturizing, and leaving the skin soft and elastic. Sodium hyaluronate is a humectant, forming a thin film on the skin surface, resulting in a smooth feel and providing protection for the skin.

[0010] In some preferred embodiments of the present invention, the walnut shell powder is 200 mesh and the sucrose is 60-80 mesh.

[0011] This invention uses walnut shell powder (200 mesh) and sucrose (60-80 mesh) as compound abrasives. The synergistic effect of abrasives with different particle sizes can more effectively remove dead skin from the lips, while avoiding excessive stimulation of the lip skin by a single large-particle abrasive, reducing pain and improving the user experience.

[0012] In some preferred embodiments of the present invention, the sucrose is coated with sodium hyaluronate.

[0013] In this invention, sodium hyaluronate molecules are adsorbed onto the surface of sucrose through hydrogen bonds and van der Waals forces, forming a hydrophilic film. This does not affect the frictional properties of sucrose (the particle size remains 60-80 mesh), and it can dissolve through saliva or lip moisture during friction, releasing sodium hyaluronate to provide immediate moisturizing effects and enhance the moisturizing and gentleness of the product during use.

[0014] Furthermore, the method of encapsulating sucrose with sodium hyaluronate is as follows:

[0015] (1) Add sodium hyaluronate to 5 to 10 times its weight of deionized water and stir at 30 to 40°C until completely dissolved to form a sodium hyaluronate aqueous solution with a mass concentration of 0.5% to 1%.

[0016] (2) Add 60-80 mesh sucrose particles to the above sodium hyaluronate aqueous solution, stir to disperse the sucrose evenly, the speed is 300-500 rpm, the stirring time is 5-10 minutes, and a suspension is formed;

[0017] (3) The suspension is treated by spray drying: the inlet temperature is 120-130℃, the outlet temperature is 60-70℃, and the atomization pressure is 0.2-0.3MPa, so that the water evaporates quickly and sodium hyaluronate forms a uniform film on the surface of sucrose particles, thus obtaining sucrose particles coated with sodium hyaluronate.

[0018] In some preferred embodiments of the present invention, the wax thickener comprises the following components in parts by weight: 4-6 parts microcrystalline wax, 6-7 parts beeswax, and 0.5-0.7 parts Brazilian palm (Copernicia cerifera) wax.

[0019] This invention uses carnauba wax, beeswax, and microcrystalline wax as thickeners to form a stable paste that is easy to apply and use, thus solving the problems of low-temperature clumping and high-temperature melting in existing products.

[0020] In some preferred embodiments of the present invention, the emollient comprises the following components in parts by weight: 10-30 parts petrolatum and 15-25 parts polyisobutylene.

[0021] In this invention, petrolatum can form a hydrophobic protective film, reducing water evaporation and enhancing long-lasting moisturizing; polyisobutylene can regulate the spreadability of the cream and work synergistically with petrolatum to enhance the moisturizing effect, keeping the lips moisturized, preventing dryness, and providing ample nourishment to the lips.

[0022] In some preferred embodiments of the present invention, the preservative is phenoxyethanol.

[0023] In some preferred embodiments of the present invention, the lip exfoliating scrub comprises phase A and phase B, in parts by weight:

[0024] Phase A includes: 15-25 parts petrolatum, 15-20 parts polyisobutylene, 4-5 parts microcrystalline wax, 6-7 parts beeswax, and 0.5-0.6 parts Brazilian palm (Copernicia cerifera) wax;

[0025] Phase B includes: 0.8–1.2 parts grape (VITIS VINIFERA) seed oil, 0.6–1.0 parts olive (OLEA EUROPAEA) fruit oil, 0.1–0.15 parts tocopheryl acetate, 4–5 parts walnut (JUGLANS REGIA) shell powder, 0.5–0.6 parts phenoxyethanol, 45–55 parts sucrose, 0.002–0.004 parts sodium hyaluronate, 0.1–0.2 parts bisabolol, and 0.1–0.3 parts flavoring.

[0026] In some preferred embodiments of the present invention, the lip exfoliating scrub comprises phase A and phase B, in parts by weight:

[0027] Phase A includes: 20 parts petrolatum, 20 parts polyisobutylene, 5 parts microcrystalline wax, 6 parts beeswax, and 0.5 parts Brazilian palm (Copernicia acerifera) wax;

[0028] Phase B comprises: 1.0 part grape (VITIS VINIFERA) seed oil, 0.8 part olive (OLEA EUROPAEA) fruit oil, 0.12 part tocopheryl acetate, 5 parts walnut (JUGLANS REGIA) shell powder, 0.5 part phenoxyethanol, 50 parts sucrose, 0.004 parts sodium hyaluronate, 0.1 part bisabolol, and 0.2 parts flavoring.

[0029] The second aspect of this invention provides a method for preparing a lip exfoliating scrub, comprising the following steps:

[0030] S1. Add phase A to a vacuum emulsification pot and heat to 85-90°C until it is completely melted and becomes transparent.

[0031] S2. Cool to 55-60℃, add phase B raw materials sequentially, stir evenly, and after sampling and testing to ensure compliance, remove from the pot to obtain the lip exfoliating scrub.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. The lip exfoliating scrub provided by this invention uses walnut shell powder and sucrose as compound abrasives. The abrasives of different particle sizes work synergistically to more effectively remove dead skin from the lips, while avoiding excessive stimulation of the lip skin by a single large-particle abrasive, reducing pain and improving the user experience.

[0034] 2. The lip exfoliating scrub provided by this invention uses carnauba wax, beeswax, and microcrystalline wax as thickeners to form a stable paste that is easy to apply and use. Grape seed oil and olive fruit oil are used as skin conditioning agents, which not only replenish the lipids of the stratum corneum and improve the skin barrier function, but also keep the lips moisturized, prevent dryness, provide ample nourishment, and have antioxidant effects. Furthermore, the combination of grape seed oil and olive fruit oil significantly improves the moisturizing effect and skin feel of the scrub. Bisabolol is used as a skin conditioning agent, which has anti-inflammatory, antibacterial, and skin-soothing effects, promoting lip wound healing and skin metabolism, improving the skin's resistance to irritation, and reducing potential skin discomfort during exfoliation. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In the following examples and comparative examples, the walnut shell powder is 200 mesh and the sucrose is 80 mesh.

[0037] Example 1

[0038] This embodiment provides a lip exfoliating scrub, and the components are as follows by weight:

[0039] Phase A: 15 parts petrolatum, 25 parts polyisobutylene, 4 parts microcrystalline wax, 7 parts beeswax, and 0.6 parts carnauba wax;

[0040] Phase B: 0.8 parts grape seed oil, 1.0 part olive fruit oil, 0.08 parts tocopheryl acetate, 4 parts walnut shell powder, 0.5 parts phenoxyethanol, 40 parts sucrose, 0.002 parts sodium hyaluronate, 0.1 parts bisabolol, and 0.2 parts flavoring.

[0041] The preparation method of the lip exfoliating scrub in this embodiment is as follows:

[0042] (1) Add phase A to a vacuum emulsifying pot and heat to 85°C until it is completely melted and transparent.

[0043] (2) Cool down to 55℃, add phase B raw materials in sequence, stir evenly, and after sampling and testing, remove from the pot.

[0044] Example 2

[0045] This embodiment provides a lip exfoliating scrub, and the components are as follows by weight:

[0046] Phase A: 20 parts petrolatum, 20 parts polyisobutylene, 5 parts microcrystalline wax, 6 parts beeswax, and 0.5 parts carnauba wax;

[0047] Phase B comprises: 1.0 part grape seed oil, 0.8 part olive fruit oil, 0.12 part tocopheryl acetate, 5 parts walnut shell powder, 0.5 part phenoxyethanol, 50 parts sucrose, 0.004 parts sodium hyaluronate, 0.1 part bisabolol, and 0.2 parts flavoring.

[0048] The preparation method of the lip exfoliating scrub in this embodiment is as follows:

[0049] (1) Add phase A to a vacuum emulsifying pot and heat to 87°C until it is completely melted and transparent.

[0050] (2) Cool down to 57°C, add phase B raw materials in sequence, stir evenly, and after sampling and testing, remove from the pot.

[0051] Example 3

[0052] This embodiment provides a lip exfoliating scrub, and the components are as follows by weight:

[0053] Phase A: 25 parts petrolatum, 20 parts polyisobutylene, 6 parts microcrystalline wax, 6 parts beeswax, 0.5 parts carnauba wax;

[0054] Phase B: 1.2 parts grape seed oil, 0.5 parts olive fruit oil, 0.1 parts tocopheryl acetate, 3 parts walnut shell powder, 0.6 parts phenoxyethanol, 60 parts sucrose, 0.005 parts sodium hyaluronate, 0.3 parts bisabolol, and 0.5 parts flavoring.

[0055] The preparation method of the lip exfoliating scrub in this embodiment is as follows:

[0056] (1) Add phase A to a vacuum emulsifying pot and heat to 90°C until it is completely melted and transparent.

[0057] (2) Cool down to 60℃, add phase B raw materials in sequence, stir evenly, and after sampling and testing, remove from the pot.

[0058] Example 4

[0059] The difference between this embodiment and Embodiment 2 is that the sucrose is coated with hyaluronic acid.

[0060] In this embodiment, the method for preparing hyaluronic acid-encapsulated sucrose is as follows:

[0061] (1) Add sodium hyaluronate to 6 times its weight of deionized water and stir at 30°C until completely dissolved to form a sodium hyaluronate aqueous solution with a mass concentration of 1%.

[0062] (2) Add sucrose granules to the above sodium hyaluronate aqueous solution, stir to disperse the sucrose evenly, the speed is 300 rpm, the stirring time is 5 minutes, and a suspension is formed;

[0063] (3) The suspension was treated by spray drying: the inlet temperature was 125℃, the outlet temperature was 60℃, and the atomization pressure was 0.2MPa, so that the water evaporated quickly and sodium hyaluronate formed a uniform film on the surface of the sucrose particles, thus obtaining sucrose particles coated with sodium hyaluronate.

[0064] Comparative Example 1

[0065] The difference between Comparative Example 1 and Example 2 is that phase B does not contain walnut shell powder.

[0066] Comparative Example 2

[0067] The difference between Comparative Example 2 and Example 2 is that phase B does not contain sucrose.

[0068] Comparative Example 3

[0069] The difference between Comparative Example 3 and Example 2 is that 100-mesh walnut shell powder was used in phase B.

[0070] Comparative Example 4

[0071] The difference between Comparative Example 4 and Example 2 is that 100-mesh macadamia nut shell powder was used instead of walnut shell powder.

[0072] Comparative Example 5

[0073] The difference between Comparative Example 5 and Example 2 is that phase B does not contain bisabolol.

[0074] Comparative Example 6

[0075] The difference between Comparative Example 6 and Example 2 is that the formulation does not contain grape seed oil and olive fruit oil.

[0076] Comparative Example 7

[0077] The difference between Comparative Example 7 and Example 2 is that the formula does not contain oil-free olive fruit oil.

[0078] Comparative Example 8

[0079] The difference between Comparative Example 8 and Example 2 is that the oil-free olive fruit oil in the formula is replaced with an equal amount of jojoba seed oil.

[0080] Performance testing

[0081] Thirty volunteers (aged 20-35, all with dry, chapped lips) were selected and used the products from Examples 1-4 and Comparative Examples 1-8 twice a week for two consecutive weeks. The following indicators were then tested:

[0082] 1. Dead skin removal rate: Use transparent tape to remove dead skin from the lips, and weigh the weight gain of the tape before and after use using an electronic balance;

[0083] 2. Skin irritation score: based on subjective scores from volunteers (0 points for no discomfort, 5 points for severe stinging and redness);

[0084] 3. Skin feel rating: Based on subjective ratings from volunteers (0 being the worst and 5 being the best);

[0085] 3. 24-hour moisturizing rate: using The CM825 skin moisture meter measures the ratio of lip moisture content to the initial value 24 hours after use.

[0086] Table 1

[0087] Dead skin removal rate / % Skin irritation score Skin feel rating 24h moisturizing rate / % Example 1 91 0.4 4.7 82 Example 2 93 0.3 4.8 85 Example 3 92 0.4 4.7 83 Example 4 93 0.2 4.9 89 Comparative Example 1 78 2.1 3.1 81 Comparative Example 2 66 1.5 4.5 78 Comparative Example 3 85 0.4 4.6 81 Comparative Example 4 83 1.0 3.8 84 Comparative Example 5 91 1.5 4.1 80 Comparative Example 6 88 0.5 3.4 69 Comparative Example 7 90 0.6 3.9 82 Comparative Example 8 91 0.5 4.1 83

[0088] Please refer to Table 1. The lip exfoliating scrubs in Examples 1-4 have good dead skin removal and moisturizing effects, with a dead skin removal rate of over 90%. They also exhibit low skin irritation and a 24-hour moisturizing rate of over 80%. Among them, the lip exfoliating scrub in Example 4 uses sucrose encapsulated in sodium hyaluronate, resulting in even better moisturizing effects and less irritation.

[0089] In Comparative Example 1, the lip scrub, using only sucrose as an abrasive, showed a significant decrease in dead skin removal efficiency, at only 78%. Furthermore, the large particle size of sucrose caused pain to sensitive lip skin during exfoliation, resulting in significant skin irritation, with an irritation score of 2.1. In Comparative Example 2, when only walnut shell powder was used as an abrasive without sucrose, although skin irritation was lower, the dead skin removal efficiency was greatly reduced, at only 66%. This indicates that the synergistic effect of sucrose and walnut shell powder not only provides a good dead skin removal effect but also ensures minimal irritation.

[0090] In Comparative Example 3, when 100-mesh walnut shell powder was used, the exfoliating effect of the scrub decreased to only 85%. This indicates that the particle size of the walnut shell powder is crucial for its exfoliating effect. Only by combining walnut shell powder of different particle sizes with sucrose can a relatively thorough removal of lip keratin be achieved.

[0091] In Comparative Example 4, the lip exfoliating scrub used 100-mesh macadamia shell powder instead of walnut shell powder. Because macadamia shell powder is harder and more irritating to the skin, and its exfoliation effect is not as good as walnut shell powder, the exfoliation rate in Comparative Example 4 was only 83%, and the irritation score reached 1.0.

[0092] The lip scrub in Comparative Example 5, due to its lack of bisabolol, resulted in decreased skin irritation resistance, with an irritation score of 1.5.

[0093] Comparative Example 6, a lip exfoliating scrub, lacked grapeseed oil and olive fruit oil, resulting in a significantly lower moisturizing rate, with a 24-hour moisturizing rate of only 69%. The absence of these plant oils also led to a substantial decrease in moisturizing effect and skin feel. Comparative Example 7, a lip exfoliating scrub, did not contain olive fruit oil, while Comparative Example 8 used an equal amount of jojoba seed oil instead of olive fruit oil. While the moisturizing rate was similar to that of Example 2, the skin feel score was slightly lower, indicating that grapeseed oil needs to be combined with olive fruit oil to achieve the best effect in improving skin feel.

[0094] In summary, the lip exfoliating scrub provided by this invention uses walnut shell powder and sucrose as compound abrasives. The synergistic effect of abrasives with different particle sizes can more effectively remove dead skin from the lips, while avoiding excessive stimulation of the lip skin by a single large-particle abrasive, reducing pain and improving the user experience.

[0095] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A lip exfoliating scrub, characterized in that, It includes the following components by weight: 0.5-1.5 parts grape (VITISVINIFERA) seed oil, 0.5-1.5 parts olive (OLEA EUROPAEA) fruit oil, 0.05-0.15 parts tocopheryl acetate, 0.001-0.005 parts sodium hyaluronate, 0.1-0.3 parts bisabolol, 25-55 parts emollient, 1-5 parts wax thickener, 0.1-3 parts preservative, 3-5 parts walnut (JUGLANS REGIA) shell powder, 40-60 parts sucrose, and 0.1-0.5 parts flavoring.

2. The lip exfoliating scrub according to claim 1, characterized in that, The walnut shell powder is 200 mesh, and the sucrose is 60-80 mesh.

3. The lip exfoliating scrub according to claim 1, characterized in that, The sucrose is encapsulated in sodium hyaluronate.

4. The lip exfoliating scrub according to claim 1, characterized in that, The wax thickener comprises the following components in parts by weight: 4-6 parts microcrystalline wax, 6-7 parts beeswax, and 0.5-0.7 parts Brazilian palm (Copernicia cerifera) wax.

5. The lip exfoliating scrub according to claim 1, characterized in that, The emollient comprises the following components in parts by weight: 10-30 parts petrolatum and 15-25 parts polyisobutylene.

6. The lip exfoliating scrub according to claim 1, characterized in that, The preservative is phenoxyethanol.

7. The lip exfoliating scrub according to claim 1, characterized in that, Composed of phase A and phase B, by weight: Phase A includes: 15-25 parts petrolatum, 15-20 parts polyisobutylene, 4-5 parts microcrystalline wax, 6-7 parts beeswax, and 0.5-0.6 parts Brazilian palm (Copernicia cerifera) wax; Phase B includes: 0.8–1.2 parts grape (VITIS VINIFERA) seed oil, 0.6–1.0 parts olive (OLEA EUROPAEA) fruit oil, 0.1–0.15 parts tocopheryl acetate, 4–5 parts walnut (JUGLANS REGIA) shell powder, 0.5–0.6 parts phenoxyethanol, 45–55 parts sucrose, 0.002–0.004 parts sodium hyaluronate, 0.1–0.2 parts bisabolol, and 0.1–0.3 parts flavoring.

8. The lip exfoliating scrub according to claim 1, characterized in that, Composed of phase A and phase B, by weight: Phase A includes: 20 parts petrolatum, 20 parts polyisobutylene, 5 parts microcrystalline wax, 6 parts beeswax, and 0.5 parts Brazilian palm (Copernicia acerifera) wax; Phase B comprises: 1.0 part grape (VITIS VINIFERA) seed oil, 0.8 part olive (OLEA EUROPAEA) fruit oil, 0.12 part tocopheryl acetate, 5 parts walnut (JUGLANS REGIA) shell powder, 0.5 part phenoxyethanol, 50 parts sucrose, 0.004 parts sodium hyaluronate, 0.1 part bisabolol, and 0.2 parts flavoring.

9. A method for preparing a lip exfoliating scrub according to claim 7 or 8, characterized in that, Includes the following steps: S1. Add phase A to a vacuum emulsification pot and heat to 85-90°C until it is completely melted and becomes transparent. S2. Cool to 55-60℃, add phase B raw materials sequentially, stir evenly, and after sampling and testing to ensure compliance, remove from the pot to obtain the lip exfoliating scrub.