A BB cream and its preparation method

Abstract

This invention discloses a BB cream and its preparation method, relating to the field of cosmetic technology. The BB cream comprises the following components in parts by weight: 1-20 parts inorganic powder, 5-30 parts dispersant, 0.5-3 parts thickener, and 0.05-8 parts film-forming agent. This invention utilizes a specific combination of dispersant, thickener, and film-forming agent to provide a BB cream that is oil-free, has good makeup-holding effect, and good film-forming and oil-controlling effect. This invention, through the combination of passivated zinc oxide and zinc oxide with a relatively balanced hydrophilic and lipophilic nature, can improve the film-forming and hydrophobic effects of the BB cream system.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to a BB cream and its preparation method. Background Technology

[0002] Currently, most BB creams on the market have the following drawbacks: high oil content. CN201711275428.7 describes a low-oil, refreshing, long-lasting BB cream that still contains 3.5% silicone oil. High oil content easily clogs pores and can further lead to acne and other problems. In the cosmetics industry, it is generally believed that to achieve a longer-lasting makeup effect, hydrophobic surface-treated powders are needed. However, hydrophobic surface-treated powders require the introduction of oils for dispersion. Therefore, under the existing cosmetic system, introducing oils into the formula is an unavoidable technical path for BB creams to achieve long-lasting makeup.

[0003] Therefore, a cosmetic product that is oil-free, has good makeup-holding effect, and forms a film to control oil has good application prospects. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a BB cream and its preparation method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a BB cream, comprising the following components in parts by weight: 1-20 parts of inorganic powder, 5-30 parts of dispersant, 0.5-3 parts of thickener, and 0.05-8 parts of film-forming agent; wherein the inorganic powder comprises zinc oxide treated with hydrated silica and zinc oxide treated with polysorbate-80, in a weight ratio of (0.5-10):(0.5-10); the dispersant comprises polypropylene glycol-15, polyethylene glycol-400, and glycerol. The oil-based polyether-26 has a weight ratio of (0.05-3):(0.05-3):(5-20); the thickener includes ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer and ammonium acryloyl dimethyl taurate / VP copolymer, with a weight ratio of (0.5-2):(0.05-0.5); the film-forming agent includes polyurethane-35 and acrylic (ester) copolymer, with a weight ratio of (0.05-5):(0.05-0.5).

[0006] This invention provides a BB cream that utilizes a combination of hydrated silica-treated zinc oxide and polysorbate-80-treated zinc oxide. The hydrated silica-treated zinc oxide is passivated zinc oxide; the polysorbate-80-treated zinc oxide is a zinc oxide with a relatively balanced hydrophilic and lipophilic ratio. This invention, through the combined use of passivated zinc oxide and zinc oxide with a relatively balanced hydrophilic and lipophilic ratio, improves the film-forming and hydrophobic properties of the BB cream system.

[0007] This invention selects specific dispersants, namely polypropylene glycol-15, polyethylene glycol-400, and glycerol polyether-26. Polypropylene glycol-15 and polyethylene glycol-400, among others, are dispersants with both hydrophilic and lipophilic groups and moderately long chains, resulting in good dispersion and uniform film formation. This invention also selects specific thickeners. The acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer selected in this invention is a high-molecular-weight polymer with strong hydrophobic groups in its molecular chain. It synergistically thickens with the acryloyl dimethyl taurate / VP copolymer, improving thickening efficiency. Finally, this invention selects specific film-forming agents. Acrylic (ester) copolymers are high-molecular-weight film-forming agents with a high proportion of hydrophobic groups, providing a hydrophobic framework in the system. Crosslinking with polyurethane-35 (a polyurethane film-forming agent with a suitable ratio of hydrophilic and lipophilic groups) achieves a 1+1>2 effect, resulting in better film formation.

[0008] This invention utilizes a combination of specific dispersants, thickeners, and film-forming agents to provide a BB cream that is oil-free, has good makeup-holding effect, and provides good film-forming and oil-controlling properties.

[0009] Preferably, the BB cream comprises the following components in parts by weight: 8-15 parts of dispersant, 1-2 parts of thickener, and 4-6 parts of film-forming agent.

[0010] Preferably, the weight ratio of polypropylene glycol-15, polyethylene glycol-400, and glycerol polyether-26 in the dispersant is (1-2):(2.5-3):(5-8). Preferably, the weight ratio of ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer and ammonium acryloyl dimethyl taurate / VP copolymer in the thickener is (1-1.5):(0.1-0.3). Preferably, the weight ratio of polyurethane-35 and acrylate copolymer in the film-forming agent is (4-5):(0.05-0.1).

[0011] The inventors discovered during actual experiments that when the dispersant, thickener, and film-forming agent are selected in the above-mentioned weight proportions, the effects of makeup retention, film formation, and oil control are better.

[0012] Preferably, the dispersant has a mass percentage content of 9-15% in the BB cream.

[0013] Preferably, the thickener has a mass percentage content of 1-2% in the BB cream.

[0014] During actual experiments, the inventors discovered that the mass percentage of dispersants and thickeners in the BB cream has a significant impact on the system's makeup-holding, film-forming, and oil-controlling effects. When the dispersants and thickeners are used at the above-mentioned amounts, the makeup-holding, film-forming, and oil-controlling effects are even better.

[0015] Preferably, the film-forming agent has a mass percentage content of 4-5.5% in the BB cream.

[0016] During actual experiments, the inventors discovered that the mass percentage of the film-forming agent in the BB cream has a significant impact on the system's makeup-holding, film-forming, and oil-controlling effects. When the film-forming agent is used at the above-mentioned amount, the makeup-holding, film-forming, and oil-controlling effects are even better.

[0017] Preferably, the weight ratio of zinc oxide treated with hydrated silica and zinc oxide treated with polysorbate-80 in the inorganic powder is (1-2):(3-4).

[0018] During actual experiments, the inventors discovered that the weight ratio of zinc oxide treated with hydrated silica to zinc oxide treated with polysorbate-80 in the inorganic powder further affects the makeup-holding, film-forming, and oil-controlling effects of the BB cream. When the weight ratio of zinc oxide treated with hydrated silica to zinc oxide treated with polysorbate-80 in the inorganic powder is within the above range, the makeup-holding, film-forming, and oil-controlling effects are better.

[0019] Preferably, the BB cream further includes 0.5-2 parts of preservatives; the preservatives include at least one of p-hydroxyacetophenone, butylparaben, 1,2-hexanediol, 1,2-pentanediol, octyl glycol, ethylhexylglycerin, phenoxyethanol, and sodium benzoate.

[0020] Furthermore, the present invention provides a method for preparing the aforementioned BB cream, comprising the following steps: (1) Add the above polyethylene glycol-400, glycerol polyether-26 and deionized water to an emulsifying pot, heat and stir to obtain an aqueous phase; (2) Slowly add the above thickener to the aqueous phase of step (1), keep warm and stir to obtain mixed solution A; (3) Add the above film-forming agent to polypropylene glycol-15, stir and disperse evenly to prepare a pre-dispersion, and then slowly add the pre-dispersion to the mixed solution A, keep warm and stir to obtain mixed solution B; (4) The inorganic powder above is mixed with deionized water and homogenized to obtain a powder slurry; (5) The powder slurry is slowly added to the mixed solution B, stirred and homogenized to obtain mixed solution C; (6) Cool the mixed solution C to 45-55℃, add preservative, continue to cool to 35-45℃, control the pH value of the system to 5.5-7.0, stir and filter to obtain the finished product of the bare face cream.

[0021] Preferably, in step (1), after heating to 70-80℃, the temperature is maintained for 10-20 minutes, the stirring speed is 300-800 r / min, and the stirring time is 10-20 minutes; Preferably, in step (2), the temperature is kept at 70-80℃, the stirring speed is 300-800 r / min, and the stirring time is 20-30 min; Preferably, in step (3), the temperature is kept at 70-80℃, the stirring speed is 300-800 r / min, and the stirring time is 15-25 min; Preferably, in step (4), the homogenization speed is 2000-3500 r / min, and the homogenization time is 5-10 min; Preferably, in step (5), the stirring speed is 300-400 r / min and the stirring time is 10-30 min; the homogenization speed is 8000-12000 r / min and the homogenization time is 3-8 min. Preferably, in step (6), the stirring speed is 100-200 r / min and the stirring time is 5-10 min.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the present invention achieves waterproof film formation and oil control, and improves makeup staying power without adding oil, while reducing the risk of clogging pores and causing acne. Attached Figure Description

[0023] Figure 1 This is a before-and-after comparison image of volunteers using the product in Example 1. Figure 2 The before-and-after comparison images are for Comparative Example 1 volunteers. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0026] In this application, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0027] Unless otherwise specified, the experimental reagents and instruments used in the embodiments and comparative examples of this invention are all commonly used reagents and instruments, and are all commercially available. Unless otherwise specified, the experimental methods used in the embodiments and comparative examples are conventional methods; and unless otherwise specified, the raw materials used in parallel experiments are from the same batch.

[0028] Zinc oxide-1: Hydrated silica treated zinc oxide: FINEX-33W, Sakai Chemical Industry Co., Ltd.; Zinc oxide-2: Zinc oxide treated with polysorbate-80: CANDY ZINC 1000, Sakai Chemical Industry Co., Ltd.; Zinc oxide-3: NA000S ZS1004B, Changzhou Nao New Material Technology Co., Ltd.; Zinc oxide-4: NLOFZ30, Guangzhou Nafu Chemical Technology Co., Ltd.; Examples and Comparative Examples This invention provides a BB cream. The components and weight parts of the BB creams in the embodiments and comparative examples are shown in Tables 1-2 below, with a total weight of 100 parts. The preparation method of the BB cream includes the following steps: (1) Add the above polyethylene glycol-400, glycerol polyether-26 and deionized water into an emulsifying pot, heat to 75°C and keep warm for 15 min, stir at 500 r / min for 15 min to obtain an aqueous phase; (2) The above thickener is slowly added to the aqueous phase of step (1), kept at 75°C, and stirred for 20 minutes at a speed of 500 r / min to obtain mixed solution A; (3) Add the above film-forming agent to polypropylene glycol-15 and disperse it evenly to prepare a pre-dispersion. Then slowly add the pre-dispersion to the mixed solution A, keep it warm and stir to obtain mixed solution B; keep it warm at 75°C and stir at 500 r / min for 20 min. (4) The inorganic powder above is mixed with deionized water and homogenized to obtain a powder slurry; the homogenization speed is 3500 r / min and the homogenization time is 8 min. (5) The powder slurry is slowly added to the mixed solution B, stirred and homogenized to obtain mixed solution C; the stirring speed is 400 r / min and the stirring time is 20 min; the homogenization speed is 8000 r / min and the homogenization time is 5 min. (6) Cool the mixed solution C to 50°C, add preservative, continue cooling to 40°C, control the pH value of the system to 5.5-7.0, stir at 200r / min for 10min, filter and discharge to obtain the finished product of the bare face cream.

[0029] The preparation method for the comparative example is the same: simply add the corresponding replacement components.

[0030] Table 1 Table 2 Performance Testing - 1 Stimulation Test To verify the safety of the prepared and comparative versions of the BB cream on human skin. Following the human skin patch test guidelines of the "Cosmetic Safety Technical Specifications" (2015), 33 volunteers aged 20-45 years were recruited. The test environment was (21±1)℃ and (50±10)% humidity.

[0031] The test method is as follows: Select a qualified patch tester and use the closed patch test method. Take 0.020-0.025 mL of BB cream and place it in the patch tester. Apply it to the back of the subject with medical tape. Remove the test substance after 24 hours and observe the skin reaction at 0.5 h, 24 h and 48 h after removing the patch. The skin reaction grading criteria are shown in Table 3. The test results are shown in Table 3.

[0032] Table 3 Experimental results showed that no adverse reactions were observed in the patch tests of the cosmetic products described in this application.

[0033] Performance Test - 2 Waterproof Makeup Lasting Power Test (1) Water resistance test: The BB cream prepared in the examples and comparative examples was evenly applied to a standard PMMA plate (plate weight 10.0000g), and the coating amount was consistent with the actual amount used (approximately 2mg / cm²). 2 The sample was dried at room temperature for 30 minutes to form a film. It was then placed in a constant temperature water bath at 32±1℃ and completely immersed, gently stirring every 5 minutes for 40 minutes. The sample was then removed, its surface moisture was gently wiped with a lint-free cloth, and it was left at room temperature for 10 minutes before being weighed. The dried sample was then weighed. Record the initial dry film weight M1 = total weight of the sample after coating W1 - weight of the blank plate W0; The remaining dry film weight M2 after soaking = the total weight of the sample after soaking and wiping off moisture W2 - the weight of the blank plate W0; Waterproofing retention rate = M2 / M1 × 100%.

[0034] (2) Makeup-holding and oil-controlling ability test: The skin brightness (L) value and whiteness (ITA) value were measured using the Vplus® intelligent skin analysis system. Before testing, the test area was cleaned and allowed to equilibrate at room temperature for 15 minutes. Initial L and ITA values ​​were measured; 2 mg / cm² was applied. 2 The sample was evenly applied to the subject's face and allowed to form a film at room temperature for 30 minutes. The L and ITA values ​​were then measured again at the same location. The rate of change in skin color L value and the rate of change in skin color ITA were calculated according to the formula.

[0035] ITA change rate = (ITA before use - ITA after use) / ITA before use × 100%; L-value change rate = (L-value before use - L-value after use) / L-value before use × 100%; Simultaneously, clean the test area before testing, allow it to equilibrate to room temperature for 15 minutes, and initially photograph the area of ​​ultraviolet fluorescent spots; at 2 mg / cm² 2 The sample was evenly applied to the subject's face. After 4 hours and 8 hours, the same location was photographed to compare the ultraviolet fluorescent spots. Fewer ultraviolet fluorescent spots indicate that the secretion of sebum was inhibited (ultraviolet fluorescent spots represent porphyrin sebum on the face. Porphyrin is a bacterial metabolite that may clog pores).

[0036] 4-hour UV fluorescence spot change rate = (4-hour UV fluorescence spot area - initial UV fluorescence spot area) / initial UV fluorescence spot area × 100%; 8-hour UV fluorescence spot change rate = (8-hour UV fluorescence spot area - initial UV fluorescence spot area) / initial UV fluorescence spot area × 100%; The test results are shown in Table 4.

[0037] Table 4 Figure 1 Before and after comparison images of volunteers using the BB cream prepared in Example 1; Figure 2 Comparative Example 1: Before and after photos of volunteers using the BB cream; The BB cream prepared in this application example has a significant effect.

[0038] As shown in the table above, the BB cream prepared by this invention utilizes a combination of zinc oxide treated with specific hydrated silica and zinc oxide treated with polysorbate-80, along with specific dispersants, thickeners, and film-forming agents, resulting in excellent waterproof, makeup-holding, and oil-controlling effects. The BB cream prepared by this invention exhibits a waterproof retention rate ≥70%, an absolute value of ITA change rate ≥9%, an absolute value of L value change rate ≥3%, a 4-hour UV fluorescent spot area change rate ≤40%, and an 8-hour UV fluorescent spot area change rate ≤81%.

[0039] As can be seen from the comparison of Examples 1-4, the dispersant ratio affects the final appearance of the BB cream. When the weight ratio of polypropylene glycol-15, polyethylene glycol-400 and glyceryl polyether-26 in the dispersant is (1-2):(2.5-3):(5-8), the final waterproof, makeup-holding, film-forming and oil-controlling effects are better.

[0040] As can be seen from the comparison of Examples 1 and 5-7, the ratio of thickener affects the final appearance of the BB cream. When the weight ratio of ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer and ammonium acryloyl dimethyl taurate / VP copolymer in the thickener is (1-1.5):(0.1-0.3), the final waterproof, makeup-holding, film-forming and oil-controlling effects are better.

[0041] As can be seen from the comparison of Examples 1 and 8-9, the ratio of film-forming agents affects the final appearance of the BB cream. When the weight ratio of polyurethane-35 and acrylic (ester) copolymer in the film-forming agent is (4-5):(0.05-0.1), the final waterproof, makeup-holding, film-forming and oil-controlling effects are better.

[0042] As can be seen from the comparison of Examples 1 and Examples 10-13, the inorganic powder ratio affects the final appearance of the BB cream. When the weight ratio of zinc oxide treated with hydrated silica and zinc oxide treated with polysorbate-80 in the inorganic powder is (1-2):(3-4), the final waterproof, makeup-holding, film-forming and oil-controlling effects are better.

[0043] As can be seen from the comparison of Examples 1 and Comparative Examples, when the dispersant, thickener, and inorganic powder are not selected according to the specific requirements of this application, good waterproof, makeup-holding, film-forming, and oil-controlling effects cannot be achieved. Specifically, in Comparative Examples 1-2, the inorganic powder types were not selected according to the specific requirements of this application, resulting in significant differences in powder properties, poorer film-forming and hydrophobicity, and a significant decrease in the combined effect of waterproof film formation and brightening. Furthermore, uneven powder spreading and altered adsorption led to decreased oil-controlling stability and increased fluorescence point change rate. In Comparative Examples 3-5, the dispersant types were not selected according to the specific requirements of this application, resulting in poorly dispersed powder agglomeration and a significant decrease in optical brightening effect. Simultaneously, the film layer was loose and discontinuous, significantly reducing waterproof performance; the surface was uneven, pores increased, oil control ability weakened, and fluorescence point increase increased. In Comparative Examples 6-7, the thickener types were not selected according to the specific requirements of this application. The change in thickener led to uneven film thickness, reduced brightening effect; the film structure was loose, reducing waterproof performance; and the uneven surface state resulted in a weakened final oil-controlling effect.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit the scope of protection of this application. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the substance and scope of the technical solutions of this application.

Claims

1. A BB cream, characterized in that, It includes the following components in parts by weight: 1-20 parts inorganic powder, 5-30 parts dispersant, 0.5-3 parts thickener, and 0.05-8 parts film-forming agent; The inorganic powder comprises zinc oxide treated with hydrated silica and zinc oxide treated with polysorbate-80, in a weight ratio of (0.5-10):(0.5-10). The dispersant comprises polypropylene glycol-15, polyethylene glycol-400, and glycerol polyether-26 in a weight ratio of (0.05-3):(0.05-3):(5-20). The thickener comprises ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer and ammonium acryloyl dimethyl taurate / VP copolymer, in a weight ratio of (0.5-2):(0.05-0.5). The film-forming agent comprises polyurethane-35 and an acrylate copolymer in a weight ratio of (0.05-5):(0.05-0.5).

2. The BB cream as described in claim 1, characterized in that, It includes the following components in parts by weight: 8-15 parts dispersant, 1-2 parts thickener, and 4-6 parts film-forming agent.

3. The BB cream as described in claim 1, characterized in that, The weight ratio of polypropylene glycol-15, polyethylene glycol-400, and glycerol polyether-26 in the dispersant is (1-2):(2.5-3):(5-8). And / or, the weight ratio of ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate crosspolymer and ammonium acryloyl dimethyl taurate / VP copolymer in the thickener is (1-1.5):(0.1-0.3); And / or, the weight ratio of polyurethane-35 and acrylate copolymer in the film-forming agent is (4-5):(0.05-0.1).

4. The BB cream as described in claim 1, characterized in that, The dispersant has a mass percentage of 9-15% in the BB cream.

5. The BB cream as described in claim 1, characterized in that, The thickener has a mass percentage of 1-2% in the BB cream.

6. The BB cream as described in claim 1, characterized in that, The film-forming agent has a mass percentage of 4-5.5% in the BB cream.

7. The BB cream as described in claim 1, characterized in that, The weight ratio of zinc oxide treated with hydrated silica to zinc oxide treated with polysorbate-80 in the inorganic powder is (1-2):(3-4).

8. The BB cream as described in claim 1, characterized in that, It also includes 0.5-2 parts of preservative; the preservative includes at least one of p-hydroxyacetophenone, butyl p-hydroxybenzoate, 1,2-hexanediol, 1,2-pentanediol, octyl glycol, ethylhexylglycerin, phenoxyethanol, and sodium benzoate.

9. A method for preparing a BB cream as described in any one of claims 1-8, characterized in that, Includes the following steps: (1) Add the above polyethylene glycol-400, glycerol polyether-26 and deionized water to an emulsifying pot, heat and stir to obtain an aqueous phase; (2) Slowly add the above thickener to the aqueous phase of step (1), keep warm and stir to obtain mixed solution A; (3) Add the above film-forming agent to polypropylene glycol-15, stir and disperse evenly to prepare a pre-dispersion, and then slowly add the pre-dispersion to the mixed solution A, keep warm and stir to obtain mixed solution B; (4) The inorganic powder above is mixed with deionized water and homogenized to obtain a powder slurry; (5) The powder slurry is slowly added to the mixed solution B, stirred and homogenized to obtain mixed solution C; (6) Cool the mixed solution C to 45-55℃, add preservatives, continue to cool to 35-45℃, control the pH value of the system to 5.5-7.0, stir and filter to obtain the finished product of the bare face cream.

10. The method for preparing the BB cream as described in claim 9, characterized in that, In step (1), the temperature is raised to 70-80℃ and then kept at that temperature for 10-20 minutes. The stirring speed is 300-800 r / min and the stirring time is 10-20 minutes. And / or, in step (2), the temperature is kept at 70-80℃, the stirring speed is 300-800r / min, and the stirring time is 20-30min; And / or, in step (3), the temperature is kept at 70-80℃, the stirring speed is 300-800r / min, and the stirring time is 15-25min; And / or, in step (4), the homogenization speed is 2000-3500 r / min, and the homogenization time is 5-10 min; And / or, in step (5), the stirring speed is 300-400 r / min and the stirring time is 10-30 min; the homogenization speed is 8000-12000 r / min and the homogenization time is 3-8 min; And / or, in step (6), the stirring speed is 100-200 r / min and the stirring time is 5-10 min.

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