Liquid foundation and preparation method thereof

Abstract

The invention relates to liquid foundation and a preparation method thereof, and belongs to the technical field of cosmetics. The liquid foundation is prepared from the following components in parts by weight: 9.85 to 36.7 parts of colorant composition, 12 to 65 parts of skin conditioner, 2 to 20 parts of emollient, 0.5 to 4 parts of emulsifier, 2 to 45 parts of humectant, 0.5 to 2 parts of filler, 0.2 to 1 part of preservative, 0.05 to 0.5 part of aromatic, 0.02 to 8 parts of plant extract and 8 to 34 parts of water, the skin conditioning agent is prepared from isododecane, trimethylsiloxy silicate ester, isononyl isononanoate, polyglycerol-3 ricinoleate and polyglycerol-10 dioleate. The invention further discloses a preparation method of the skin conditioning agent. The liquid foundation disclosed by the invention has the effects of good flowability, moistening, oxidation resistance and long makeup duration.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and in particular to a liquid foundation and a preparation method thereof. Background Art

[0002] Liquid foundation, as a common cosmetic, not only has the functions of concealing blemishes, moisturizing and sun protection, but also introduces concepts such as skin care and anti-aging to meet consumers' diverse and personalized needs for beauty products. The market competition in the liquid foundation industry is becoming increasingly fierce, and companies need to improve their competitiveness through technological innovation and product differentiation. Therefore, innovative research on liquid foundation is very necessary.

[0003] At the same time, existing conventional liquid foundations still have problems such as short-lasting makeup effect, easy makeup removal, weak oil control effect, easy powder floating, powder sticking and patchy, unnatural makeup effect, and imperfect makeup experience. It is necessary to develop a liquid foundation with good fluidity, moisturizing, anti-oxidation, and long makeup lasting time to solve the problems of liquid foundation not lasting and powder sticking. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a liquid foundation with good fluidity, moisturizing, anti-oxidation and long makeup lasting time and a preparation method thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a liquid foundation, comprising the following components, measured by weight: 9.85 to 36.7 parts of a colorant composition, 12 to 65 parts of a skin conditioner, 2 to 20 parts of an emollient, 0.5 to 4 parts of an emulsifier, 2 to 45 parts of a moisturizer, 0.5 to 2 parts of a filler, 0.2 to 1 parts of a preservative, 0.05 to 0.5 parts of a fragrance, 0.02 to 8 parts of a plant extract, and 8 to 34 parts of water;

[0007] The skin conditioning agent consists of isododecane, trimethylsiloxysilicate, isononyl isononanoate, polyglyceryl-3 ricinoleate and polyglyceryl-10 dioleate.

[0008] The invention selects skin conditioning agents of specific components, and the obtained liquid foundation has the effects of good fluidity, moisturizing, anti-oxidation and long makeup-lasting time.

[0009] The present invention utilizes trimethylsiloxysilicate to form a waterproof film on the skin surface, which helps to prevent water loss and external environment from damaging the skin. Although the VP / hexadecene copolymer film former can also form a waterproof film on the skin surface, the comprehensive conditioning effect of the combination of the VP / hexadecene copolymer with isododecane, isononyl isononanoate, polyglyceryl-3 ricinoleate and polyglyceryl-10 dioleate is significantly weaker than that of the combination of trimethylsiloxysilicate with isododecane, isononyl isononanoate, polyglyceryl-3 ricinoleate and polyglyceryl-10 dioleate. At the same time, trimethylsiloxysilicate has excellent softening properties, which can increase the smoothness of cosmetics, make the product easier to apply and reduce the dryness of the skin.

[0010] As a preferred embodiment of the liquid foundation of the present invention, the plant extract consists of Cordyceps sinensis extract and Portulaca oleracea extract.

[0011] The present invention utilizes plant extracts with antioxidant properties, namely cordyceps extract and purslane extract. Compared with adding cordyceps extract or purslane extract alone, the obtained liquid foundation has better antioxidant properties.

[0012] As a preferred embodiment of the liquid foundation of the present invention, the colorant composition includes CI 77891, triethoxycaprylylsilane, CI 77492, CI 77491 and CI 77499; in parts by weight, the colorant composition includes: 8 to 20 parts of CI77891, 1 to 5 parts of triethoxycaprylylsilane, 0.7 to 10 parts of CI 77492, 0.1 to 1 part of CI 77491, and 0.05 to 0.7 parts of CI77499.

[0013] As a preferred embodiment of the liquid foundation of the present invention, the colorant composition comprises, by weight: 8 to 15 parts of CI 77891, 1.2 to 3 parts of triethoxycaprylylsilane, 1 to 4 parts of CI 77492, 0.2 to 0.7 parts of CI 77491, and 0.1 to 0.3 parts of CI 77499.

[0014] As a preferred embodiment of the liquid foundation of the present invention, the colorant composition comprises, by weight: 13 parts of CI 77891, 3 parts of triethoxycaprylylsilane, 1.6 parts of CI 77492, 0.3 parts of CI 77491, and 0.15 parts of CI 77499.

[0015] As a preferred embodiment of the liquid foundation of the present invention, the skin conditioning agent is composed of 6 to 20 parts of isododecane, 2 to 20 parts of trimethylsiloxysilicate, 3 to 15 parts of isononyl isononanoate, 0.5 to 5 parts of polyglyceryl-3 ricinoleate and 0.5 to 5 parts of polyglyceryl-10 dioleate, in parts by weight.

[0016] As a preferred embodiment of the liquid foundation of the present invention, the skin conditioning agent is composed of 8 to 12 parts of isododecane, 3 to 10 parts of trimethylsiloxysilicate, 5 to 11 parts of isononyl isononanoate, 0.5 to 1.5 parts of polyglyceryl-3 ricinoleate and 0.5 to 1.5 parts of polyglyceryl-10 dioleate, in parts by weight.

[0017] As a preferred embodiment of the liquid foundation of the present invention, the skin conditioning agent is composed of 8 parts of isododecane, 6.5 parts of trimethylsiloxysilicate, 6 parts of isononyl isononanoate, 0.5 parts of polyglyceryl-3 ricinoleate and 0.5 parts of polyglyceryl-10 dioleate, in parts by weight.

[0018] As a preferred embodiment of the liquid foundation of the present invention, the moisturizing agent includes glycerin and butylene glycol; in parts by weight, the moisturizing agent includes 1 to 20 parts of glycerin and 1 to 25 parts of butylene glycol.

[0019] As a preferred embodiment of the liquid foundation of the present invention, the moisturizing agent includes 2 to 15 parts of glycerin and 2 to 10 parts of butylene glycol in parts by weight.

[0020] As a preferred embodiment of the liquid foundation of the present invention, the moisturizing agent includes 6 parts of glycerin and 5 parts of butylene glycol in parts by weight.

[0021] As a preferred embodiment of the liquid foundation of the present invention, the plant extract consists of 0.01 to 4 parts of Cordyceps sinensis extract and 0.01 to 4 parts of Portulaca oleracea extract, in parts by weight.

[0022] As a preferred embodiment of the liquid foundation of the present invention, the plant extract consists of 1-2 parts of Cordyceps sinensis extract and 2-3 parts of Portulaca oleracea extract, in parts by weight.

[0023] As a preferred embodiment of the liquid foundation of the present invention, the plant extract consists of 2 parts of Cordyceps sinensis extract and 2 parts of Portulaca oleracea extract, in parts by weight.

[0024] As a preferred embodiment of the liquid foundation of the present invention, the emollient is 2 to 10 parts, the emulsifier is 1 to 3 parts, the filler is 0.8 to 1.5 parts, the preservative is 0.3 to 0.8 parts, the fragrance is 0.1 to 0.3 parts, and water is 20-34 parts.

[0025] As a preferred embodiment of the liquid foundation of the present invention, in parts by weight, the emollient is 7 parts, the emulsifier is 3 parts, the filler is 1 part, the preservative is 0.5 parts, the fragrance is 0.1 parts, and water is 33.85 parts.

[0026] As a preferred embodiment of the liquid foundation of the present invention, the emollient is triethylhexanoin; the emulsifier is sorbitan isostearate; the filler is magnesium sulfate; the preservative is phenoxyethanol; and the fragrance is daily fragrance.

[0027] In a second aspect, the present invention provides a method for preparing the above-mentioned liquid foundation, which comprises the following steps:

[0028] S1. Heating and homogenizing a mixture of a colorant composition, a skin conditioner, an emollient, and an emulsifier until the mixture is transparent and free of bubbles to obtain phase A;

[0029] S2, adding water, moisturizer and filler into phase A, stirring evenly, and defoaming to obtain phase B;

[0030] S3, adding preservatives, aromatics and plant extracts into phase B, stirring evenly, defoaming and discharging to obtain the liquid foundation.

[0031] As a preferred embodiment of the preparation method of the present invention, the heating temperature is 80-85° C., and the homogenizing speed is 3000-3500 rpm.

[0032] As a preferred embodiment of the preparation method of the present invention, the heating temperature is 85° C. and the homogenizing speed is 3000 rpm.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The liquid foundation of the present invention has good fluidity, is moisturizing, does not stick to the face, does not dry out the skin, and is close to the skin; it has a light texture, fits well on the face, has a high degree of integration with the skin, and is very comfortable; it has a natural whitening effect and a good concealing effect; the powder is fine and creamy, has a smooth texture, has a clear makeup without being fake, does not stick to the face when applied over another application, and resists dry skin; it has its own luster, and the makeup lasts for about 8 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a comparison chart of the antioxidant effects of the liquid foundations described in Examples 1-6 of the present invention.

[0036] Figure 2 It is a comparison chart of the antioxidant effects of the liquid foundations described in Comparative Examples 1-5 of the present invention. DETAILED DESCRIPTION

[0037] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0038] Unless otherwise specified, other materials, reagents, etc. used in the examples can be obtained from commercial sources.

[0039] The Cordyceps sinensis extract is composed of: water, Cordyceps sinensis (CORDYCEPS SINENSIS) extract, butylene glycol, 1,2-hexanediol and p-hydroxyacetophenone (Zhenghe (Guangzhou) Biotechnology Co., Ltd.);

[0040] The composition of purslane extract is: water, purslane (PORTULACAOLERACEA) extract, butylene glycol, 1,2-hexanediol and p-hydroxyacetophenone (Zhenghe (Guangzhou) Biotechnology Co., Ltd.).

[0041] The manufacturers of polyglyceryl-3 ricinoleate and polyglyceryl-10 dioleate are both Guangzhou Xiaojia Chemical Technology Co., Ltd.

[0042] Examples 1 to 6

[0043] The components of the foundation liquids of Examples 1 to 6 are shown in Table 1.

[0044] Table 1

[0045]

[0046] The preparation method of the foundation liquid of embodiments 1 to 6 comprises the following steps:

[0047] S1. Mix the colorant composition and the skin conditioner according to the components in Table 1, heat the mixed colorant composition, skin conditioner, emollient and emulsifier to 85° C., stir and disperse at 3000 rpm until transparent and bubble-free, to obtain phase A.

[0048] S2, adding solvent water, the mixed moisturizer and filler into phase A, stirring evenly, and defoaming to obtain phase B;

[0049] S3, adding the preservative, fragrance and the mixed plant extract to phase B, stirring evenly, defoaming, and discharging to obtain the liquid foundation.

[0050] Comparative Example 1

[0051] The components of the liquid foundation of this comparative example are the same as those of Example 6, except that trimethylsiloxysilicate is replaced by VP / hexadecene copolymer.

[0052] Comparative Example 2

[0053] The composition of the liquid foundation of this comparative example is the same as that of Example 6, except that 0.5 parts of polyglyceryl-3 ricinoleate and 0.5 parts of polyglyceryl-10 dioleate are replaced by 1 part of polyglyceryl-3 ricinoleate.

[0054] Comparative Example 3

[0055] The composition of the liquid foundation of this comparative example is the same as that of Example 6, except that 0.5 parts of polyglyceryl-3 ricinoleate and 0.5 parts of polyglyceryl-10 dioleate are replaced by 1 part of polyglyceryl-10 dioleate.

[0056] Comparative Example 4

[0057] The composition of the liquid foundation of this comparative example is the same as that of Example 6, except that 2 parts of Cordyceps sinensis extract and 2 parts of Portulaca oleracea extract are replaced by 4 parts of Cordyceps sinensis extract.

[0058] Comparative Example 5

[0059] The composition of the liquid foundation of this comparative example is the same as that of Example 6, except that 2 parts of Cordyceps sinensis extract and 2 parts of Portulaca oleracea extract are replaced by 4 parts of Portulaca oleracea extract.

[0060] Test Example 1

[0061] At a rotation speed of 12RPM, a Brookfield DV2T viscometer (Brookfield, USA) was used to test the viscosity of the foundation liquids described in Examples 1-6 and Comparative Examples 1-5. The higher the viscosity value, the higher the consistency of the foundation liquid and the worse the fluidity; the lower the viscosity value, the lower the consistency of the foundation liquid and the better the fluidity. The test results are shown in Table 1.

[0062] Table 1

[0063] Viscosity / mPa·s Example 1 14630 Example 2 14900 Example 3 14100 Example 4 13530 Example 5 14430 Example 6 13530 Comparative Example 1 15670 Comparative Example 2 15870 Comparative Example 3 16970 Comparative Example 4 17230 Comparative Example 5 15530

[0064] The results in Table 1 show that the foundation liquids of Examples 1-6 have good fluidity, while the foundation liquids of Comparative Examples 1-5 have relatively poor fluidity.

[0065] Test Example 2

[0066] The stability of the foundation liquids of Examples 1-6 and Comparative Examples 1-5 was tested by high and low temperature experiments, ultraviolet aging experiments, and centrifugal tests.

[0067] 1. High and low temperature experiments

[0068] Test method: Equal amounts of the liquid foundation samples of Examples 1-6 and Comparative Examples 1-5 were stored at -10°C, 40°C and room temperature (25°C) for 2 weeks, and then the changes in the physical and chemical properties of the samples were observed.

[0069] (1) Physical properties

[0070] The physical properties of liquid foundation stability testing mainly focus on its morphology, appearance and physical state changes under different conditions. These physical properties include but are not limited to:

[0071] Color stability: Test the color change of liquid foundation under UV light and storage time to ensure the color is uniform and not easy to fade.

[0072] Texture stability: Evaluate the fluidity, viscosity and other texture characteristics of the liquid foundation to ensure that the texture remains unchanged during storage and use, without stratification, agglomeration, etc.

[0073] Appearance stability: Observe the changes in the appearance of the liquid foundation during storage, such as whether there are bubbles, precipitation or suspended matter, which may affect the product's effectiveness and safety.

[0074] Volatility and hygroscopicity: Test the volatility and hygroscopicity of liquid foundation to ensure the stability and effectiveness of the product under high temperature and high humidity conditions.

[0075] Packaging compatibility: Evaluate the compatibility between liquid foundation and packaging materials to prevent liquid foundation deterioration or leakage caused by packaging material problems.

[0076] (2) Chemical properties

[0077] The chemical properties of foundation stability testing mainly focus on the stability and reaction of its chemical components under different conditions. These chemical properties include but are not limited to:

[0078] pH stability: Test the pH changes of liquid foundation at different times and conditions to ensure the product's pH is stable and avoid irritation or discomfort to the skin.

[0079] Oxidation stability: Evaluate the stability of liquid foundation when it comes into contact with air or other oxidants to prevent the product from deteriorating or producing harmful substances due to oxidation.

[0080] Microbial stability: Detect the content and types of microorganisms in liquid foundation to ensure that the product will not be contaminated by microorganisms during production and use, thereby ensuring the safety and effectiveness of the product.

[0081] Chemical ingredient stability: Test the stability of various chemical ingredients in liquid foundation (such as pigments, preservatives, sunscreens, etc.) under different conditions to ensure that these ingredients will not decompose or cause adverse reactions during storage and use.

[0082] Emulsion stability: For liquid foundation containing an emulsion system, it is very important to evaluate its emulsion stability. Poor emulsion stability can lead to product stratification, demulsification and other problems, seriously affecting the product's use effect and safety.

[0083] The results of the effects of high and low temperatures on liquid foundation are shown in Table 2 below.

[0084] Table 2

[0085]

[0086]

[0087] According to Table 2, the liquid foundation prepared in the example has good stability both in high and low temperature environments.

[0088] 2. Ultraviolet aging test

[0089] Test method: The foundation liquids of the embodiments and comparative examples were irradiated with simulated natural light or specific light sources (ultraviolet rays such as UVA and UVB), and the changes in color, texture, composition, etc. in different time periods were observed to evaluate their light aging resistance.

[0090] In the present invention, equal amounts of liquid foundation samples of Examples 1-6 and Comparative Examples 1-5 are placed in an ultraviolet aging test box to simulate the effects of ultraviolet irradiation on the samples and observe the light aging resistance of the samples.

[0091] The UV light source required for the irradiation test is UVA, with a peak wavelength of 340 and an irradiation stress of 0.63W / ㎡, an ambient temperature of 60℃, and a duration of 4 hours; the condensation ambient temperature is 50℃ and a duration of 4 hours. The above is one cycle of 8 hours, and the test cycle is 6 times, for a total of 48 hours.

[0092] Judgment indicators:

[0093] Color stability: Evaluate the color changes of cosmetics under lighting conditions, including fading, discoloration, etc.

[0094] Texture stability: Evaluate the changes in the texture of cosmetics under lighting conditions, including drying, agglomeration, stratification, etc.

[0095] Ingredient stability: Evaluate the degradation of active ingredients in cosmetics under light conditions, including changes in content, structure, etc.

[0096] Protection ability: Evaluate the ability of cosmetics to protect against ultraviolet rays, especially the protection effect against harmful rays such as UVA and UVB.

[0097] The results of the effect of ultraviolet light on liquid foundation are shown in Table 3 below.

[0098] Table 3

[0099]

[0100] It can be seen from Table 3 that the liquid foundation prepared in the embodiment still has high stability after being irradiated by ultraviolet rays.

[0101] 3. Centrifugation experiment

[0102] The foundation liquids of Examples 1-6 and Comparative Examples 1-5 were subjected to high-speed centrifugation (3000 r / min, 30 min) by a centrifuge to observe the stratification and precipitation of the samples.

[0103] The results of the effect of centrifugation on liquid foundation are shown in Table 4 below.

[0104] Table 4

[0105]

[0106]

[0107] It can be seen from Table 4 that the stability of the liquid foundation prepared in the example after high-speed centrifugation is higher than that of the liquid foundation in the comparative example.

[0108] 4. The above embodiments all have five test indicators (physical property change, chemical property change, light aging resistance, stratification and precipitation). One point is awarded for passing one item, and the full score is five points.

[0109] Criteria:

[0110] Changes in physical properties: If the material becomes seriously dry, it fails the test, otherwise it passes the test.

[0111] Changes in chemical properties: If the material has a foul odor or shows gelatinous lumps, it means the test has failed, otherwise it has passed.

[0112] Light aging resistance: If the inner material shows serious discoloration, cracking and adhesion during the test phase, it means that the test fails, otherwise it passes.

[0113] Stratification and sedimentation: Through high-speed centrifugation of the liquid foundation, if the material shows stratification, oil emission, and serious precipitation of color powder, it means that the test fails, otherwise it passes the test.

[0114] The results are shown in Table 5.

[0115] Table 5

[0116] Stability related indicators Example 1 4 Example 2 4 Example 3 4 Example 4 4 Example 5 4 Example 6 5 Comparative Example 1 3 Comparative Example 2 3 Comparative Example 3 3 Comparative Example 4 3 Comparative Example 5 3

[0117] Test Example 3

[0118] People with different skin types were selected to conduct a 12-hour makeup-lasting test on the liquid foundation, and the makeup-lasting effect was determined based on the subjects' feelings and usage.

[0119] 1. Subject selection

[0120] Volunteers with oily skin, dry skin, and normal skin were selected as test subjects, and the number of volunteers with the three skin types in each group was the same. The subjects cleansed their faces uniformly before the test and used the same lotion as a primer to reduce the impact of differences in skin conditions on the test results. Subjects with uncured inflammatory skin diseases or highly allergic skin constitutions were not included in the test.

[0121] 2. Testing process

[0122] Apply equal amounts of the liquid foundation of Examples 1-6 and Comparative Examples 1-5 to the left and right faces of the subjects, respectively, to ensure uniform application. Allow the subjects to carry out normal daily activities, such as wearing masks, working, and living, so as to observe the scratch resistance and makeup durability of the liquid foundation. Record the makeup durability at different time points (2nd hour, 4th hour, 6th hour, 8th hour, 10th hour, and 12th hour), including makeup effect, whether makeup is removed, and whether it is dull.

[0123] The time from when the foundation is completely applied to when it starts to become noticeably fading or dull is taken as the makeup-lasting time; whether the makeup remains natural and even, and whether there are phenomena such as powder sticking or patchiness are used as indicators to evaluate the makeup effect. The makeup effect scoring criteria are shown in Table 6 below.

[0124] Table 6

[0125] Makeup effect score Complete makeup 5 Slight makeup removal, relatively complete makeup 4 Makeup removal degree 65% 3 Makeup removal 45% 2 Completely remove makeup 1

[0126] The makeup lasting properties of the liquid foundations of Examples 1-6 and Comparative Examples 1-5 are shown in Table 7 below.

[0127] Table 7

[0128]

[0129]

[0130] According to Table 7, the makeup lasting time of the liquid foundation prepared in the embodiment is longer than that of the liquid foundation described in the comparative example, and the liquid foundation described in the embodiment also has natural makeup effect changes, good oil control ability and antioxidant ability.

[0131] Test Example 4

[0132] The adverse reactions of the foundation liquids of Examples 1 to 6 to the skin were tested by patch test.

[0133] Volunteers aged 18-50 were selected as test subjects. Those with inflammatory skin diseases that had not been cured clinically or those with highly allergic skin constitutions were not included. The human skin patch test was conducted using standardized patch test materials. When irritation results or the results were difficult to judge in the human skin patch test, a skin repetitive open smear test should be added.

[0134] The selected area shall not exceed 50mm 2 , depth of about 1mm qualified spot tester. Put the test sample (liquid foundation of Example 1-6) into the small chamber of the spot tester, with a dosage of 0.02ml. Then apply the spot tester to the curved side of the forearm of the subject with a hypoallergenic tape, and gently press it with the palm of the hand to evenly apply it to the skin for 24 hours. Observe the skin reaction 30 minutes (after the indentation disappears), 24 hours and 48 hours after removing the test patch, and record the observation results.

[0135] The skin reaction grading standards for the skin occlusive patch test are shown in Table 8 below.

[0136] Table 8

[0137]

[0138] If the number of subjects with Grade 1 adverse skin reactions is more than 5, or the number of subjects with Grade 2 adverse skin reactions is more than 2, or the number of subjects with Grade 3 and above adverse skin reactions is not less than 1, the test substance is judged to have an adverse reaction to human skin.

[0139] The patch test results of the liquid foundations of Examples 1-6 are shown in Table 9 below.

[0140] Table 9

[0141]

[0142] The results shown in Table 9 show that the foundation liquid of the embodiment has no adverse reaction to human skin.

[0143] Test Example 5

[0144] The preservative properties of liquid foundation were tested using a microbial challenge experiment.

[0145] A certain amount of microorganisms is added to cosmetics, and the increase or decrease in the number of microorganisms is detected at regular intervals to determine the preservative efficacy of the preservative. This method can not only evaluate the efficacy of preservatives, but also determine the minimum concentration of preservatives used in cosmetics within a safe dose.

[0146] Experimental methods:

[0147] Use a sterilized dilution test tube filled with 10 ml of saline as a base tube, use an inoculation loop to take 1 ring of pure bacteria to be verified (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, Aspergillus niger, Salmonella) (the sampling amount can also be appropriately increased depending on the sampling degree) and add it to the base tube, and oscillate on an oscillator for 1-2 minutes to prepare a uniform bacterial suspension. Take 45g of the foundation liquid of Example 1-6 and add it to sterile saline to prepare a 45ml uniform sample solution. Hold the test tube with bacterial growth in the left hand, clamp the silicone plug with the little finger and ring finger of the right hand, pull out the silicone plug on the outer flame of the alcohol lamp, take 5ml of bacterial suspension from the base tube with a sterilized pipette, add it to the prepared sample solution, oscillate on an oscillator for 3-5 minutes, mix evenly and prepare a test sample for verification on the 1st, 7th, 14th, and 28th days. At the same time, take 1 ml of bacterial suspension and add it to a sterilized test tube containing 9 ml of physiological saline. Be careful that the pipette cannot touch the liquid surface. Mix well to make a 1:10 dilution, then dilute it to 1:100, 1:1000, and then dilute it to 10 -6 Dilution, replace one pipette for each dilution. After dilution, according to the content of the sample bacteria, select 1:1000, 1:10000, 1:100000 diluted bacterial solution and add them to two sterilized plates (1ml / plate). Be careful not to stick the tip of the pipette to the plate wall, and then pour 15ml of nutrient lipid culture medium that has been melted and cooled to 45-50℃ (for blank counting). After the culture medium solidifies, turn it over and culture it in an incubator for 2 days, then count it separately for use. Calculate the bacterial content of the test sample according to GB7918.2-87 standard, and this base number is the initial data of bacterial content.

[0148] On the 1st, 7th, 14th and 28th days, take 1 ml of sample and dilute it to 1:10, 1:100, 1:1000, and then dilute to 10 -6 Dilution; select 2 dilutions for inoculation and culture according to the specific situation, and calculate the culture data as the sample liquid colony; for bacteria on the first day of testing and fungi on the 7th day of testing, select dilutions of 1:1000 and 1:10000 for inoculation, and then select 1:10 and 1:100 as inoculation samples, select 2 dilutions for inoculation and culture, and calculate the sample liquid colony count; also calculate the content of microorganisms in each time period of the test sample according to GB. Divide the colony count in each time period by the colony count base, and take the reciprocal of the result with the base ten as the logarithm as the antiseptic ability index for each test time period.

[0149] When the antiseptic ability index of bacteria (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella) is greater than 1 on the first day, and greater than 3 on the 7th day and above, and the antiseptic ability index of fungi (Candida albicans, Aspergillus niger) is greater than 1 on the 7th day, and greater than 3 on the 14th day and above, the antiseptic effect is significant and the product has strong anti-pollution ability.

[0150] The antiseptic effect test results of the liquid foundations of Examples 1-6 are shown in Table 10 below.

[0151] Table 10

[0152]

[0153] The results shown in Table 10 show that the foundation liquids of the embodiments have good antiseptic effects, among which the foundation liquid of Embodiment 6 has the best antiseptic effect.

[0154] Test Example 6

[0155] 1. The heavy metals (lead, arsenic, mercury, and cadmium) of the liquid foundations prepared in Examples 1 to 6 were detected according to the heavy metal detection method described in the "Technical Specification for Safety of Cosmetics" (2015 edition).

[0156] The test results show that the mercury content in the liquid foundation prepared in Examples 1-6 is lower than 1 mg / kg, the lead content is lower than 10 mg / kg, the arsenic content is lower than 2 mg / kg, and the cadmium content is lower than 5 mg / kg, which meets the limit values ​​of harmful substances in cosmetics.

[0157] 2. The microbial conditions of the liquid foundations prepared in Examples 1 to 6 were detected according to the microbial detection method described in the "Technical Specification for Safety of Cosmetics" (2015 edition).

[0158] The test results show that the total bacteria count of the foundation liquids prepared in Examples 1 to 6 is less than 1000 CFU / g; the mold and yeast count is less than 100 CFU / g; Pseudomonas aeruginosa, Staphylococcus aureus, and heat-resistant coliform bacteria are not detected, which meets the requirements for microorganisms in cosmetics.

[0159] Test Example 7

[0160] Liquid foundation antioxidant DPPH free radical scavenging experimental test

[0161] 1. Purpose of the experiment

[0162] Through the DPPH free radical scavenging experiment, the antioxidant capacity of liquid foundation is evaluated to provide a scientific basis for cosmetics research and development.

[0163] 2. Experimental Principle

[0164] DPPH (1,1-diphenyl-2-trinitrophenylhydrazine) is a stable nitrogen-centered free radical. Its ethanol solution is dark purple and has strong absorption at a wavelength of 517nm. When a free radical scavenger is present, the color of the DPPH ethanol solution becomes lighter and the absorbance decreases due to pairing with its single electron. The change in absorbance is proportional to the degree of free radical scavenging, so the antioxidant activity of the sample can be evaluated.

[0165] 3. Experimental Materials

[0166] Liquid foundation sample; DPPH reagent; anhydrous ethanol; spectrophotometer; 1 cm cuvette; constant temperature water bath; desktop centrifuge; mortar / crusher; 30-50 mesh sieve.

[0167] IV. Experimental Procedure

[0168] (1) Preparation of DPPH solution

[0169] Accurately weigh the DPPH reagent, dissolve it in anhydrous ethanol and make up to volume to prepare a 0.04 mg / mL DPPH solution, and refrigerate it in a refrigerator for later use.

[0170] (2) Preparation of liquid foundation samples

[0171] The liquid foundation sample was dissolved in anhydrous ethanol to prepare solutions of different concentrations (such as 2, 4, 6, 8 mg / mL).

[0172] (3) Reaction mixing

[0173] Add 4.0 mL of DPPH solution and foundation samples of different concentrations into the colorimetric tube, then add anhydrous ethanol to the scale and mix well.

[0174] (4) Incubation process

[0175] The mixed solution was stored at room temperature in the dark for 30 min.

[0176] (5) Absorbance measurement

[0177] The absorbance of the mixed solution was measured at a wavelength of 517 nm using a spectrophotometer and recorded as Ai.

[0178] After being stored in the dark in the greenhouse for 30 minutes again, the absorbance was measured and recorded as Aj.

[0179] The control group was added with only ethanol solution of DPPH, and the absorbance was measured and recorded as Ac.

[0180] (6) Data processing

[0181] Free radical scavenging rate calculation

[0182] K(%)=[1-(Ai-Aj) / Ac]×100%;

[0183] K is the free radical scavenging rate; Ai is the absorbance of the sample after the reaction with DPPH; Aj is the absorbance of the sample itself at 517nm; Ac is the absorbance of the DPPH solution itself.

[0184] (7) Results Analysis

[0185] According to the scavenging rate of foundation samples of different concentrations, a dose-effect curve was drawn to evaluate its antioxidant activity. The higher the scavenging rate, the stronger the antioxidant activity of the foundation.

[0186] The antioxidant performance test results are shown in Table 11.

[0187] Table 11

[0188] Free radical scavenging rate results Example 1 64.1％ Example 2 62.8％ Example 3 62％ Example 4 60.4％ Example 5 62.5％ Example 6 65％ Comparative Example 1 42.6％ Comparative Example 2 41.1％ Comparative Example 3 38.9％ Comparative Example 4 32.7％ Comparative Example 5 36.6％

[0189] It can be seen from Table 11 that the foundation liquid of the embodiment has good antioxidant performance.

[0190] Test Case 8

[0191] Equal amounts of the foundation liquids of Examples 1-6 and Comparative Examples 1-5 were applied to the arm, and the oxidation of the foundation liquids was observed after 1 hour. The darker the color, the worse the antioxidant effect of the foundation liquid; the lighter the color, the better the antioxidant effect of the foundation liquid.

[0192] according to Figure 1 It can be seen that the color change of the foundation liquid in Example 6 after 1 hour is the smallest, indicating that the foundation liquid in Example 6 has the best antioxidant effect. Figure 2 It can be seen that the antioxidant effect of the liquid foundation described in the comparative example is not as good as the antioxidant effect of the liquid foundation described in the example.

[0193] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A liquid foundation, characterized in that: The composition comprises the following components by weight: 9.85-36.7 parts of colorant composition, 12-65 parts of skin conditioner, 2-20 parts of emollient, 0.5-4 parts of emulsifier, 2-45 parts of moisturizer, 0.5-2 parts of filler, 0.2-1 parts of preservative, 0.05-0.5 parts of fragrance, 0.02-8 parts of plant extract, and 8-34 parts of water; The skin conditioning agent is composed of isododecane, trimethylsiloxysilicate, isononyl isononanoate, polyglyceryl-3 ricinoleate and polyglyceryl-10 dioleate.

2. The liquid foundation according to claim 1, characterized in that The plant extract consists of cordyceps sinensis extract and purslane extract.

3. The liquid foundation according to claim 1, characterized in that The colorant composition includes CI 77891, triethoxycaprylylsilane, CI 77492, CI 77491 and CI 77499.

4. The liquid foundation according to claim 3, characterized in that In parts by weight, the colorant composition comprises: 8 to 20 parts of CI77891, 1 to 5 parts of triethoxyoctylsilane, 0.7 to 10 parts of CI 77492, 0.1 to 1 part of CI 77491, and 0.05 to 0.7 parts of CI77499.

5. The liquid foundation according to claim 2, characterized in that: In parts by weight, the skin conditioning agent is composed of 6 to 20 parts of isododecane, 2 to 20 parts of trimethylsiloxysilicate, 3 to 15 parts of isononyl isononanoate, 0.5 to 5 parts of polyglyceryl-3 ricinoleate and 0.5 to 5 parts of polyglyceryl-10 dioleate; And / or, in parts by weight, the plant extract consists of 0.01 to 4 parts of Cordyceps sinensis extract and 0.01 to 4 parts of Portulaca oleracea extract.

6. The liquid foundation according to claim 1, characterized in that The humectants include glycerin and butylene glycol.

7. The liquid foundation according to claim 6, characterized in that In parts by weight, the moisturizing agent includes 1 to 20 parts of glycerol and 1 to 25 parts of butylene glycol.

8. The liquid foundation according to claim 1, characterized in that In parts by weight, the emollient is 2 to 10 parts, the emulsifier is 1 to 3 parts, the filler is 0.8 to 1.5 parts, the preservative is 0.3 to 0.8 parts, the fragrance is 0.1 to 0.3 parts, and water is 20-34 parts.

9. The liquid foundation according to claim 1 or 8, characterized in that: The emollient is triethylhexanoin; the emulsifier is sorbitan isostearate; the filler is magnesium sulfate; the preservative is phenoxyethanol; and the fragrance is daily fragrance.

10. The method for preparing the liquid foundation according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1. Heating and homogenizing a mixture of a colorant composition, a skin conditioner, an emollient, and an emulsifier until the mixture is transparent and free of bubbles to obtain phase A; S2. Add water, moisturizer and filler into phase A, stir evenly and defoam to obtain phase B; S3, adding preservatives, fragrances and plant extracts into phase B, stirring evenly, defoaming and discharging to obtain the liquid foundation.

Images