Modified coloring agent, makeup-holding base makeup product and preparation method of base makeup product

Abstract

The invention belongs to the technical field of cosmetics, and particularly relates to a modified coloring agent, a makeup-holding base makeup product and a preparation method of the makeup-holding base makeup product. The preparation method of the modified colorant provided by the invention comprises the following step: reacting a colorant, a surfactant and a solvent in a nitrogen atmosphere to obtain the modified colorant. According to the modified coloring agent provided by the invention, the migration resistance of a base product can be improved, so that the base product has good concealing and waterproof effects, and a better makeup holding effect is achieved. The invention further provides a makeup-holding base product, the hydroxypropyl trimethyl ammonium chloride hyaluronic acid and the trimethylsiloxy silicate ester are selected as film-forming agents, and the synergistic interaction effect of the hydroxypropyl trimethyl ammonium chloride hyaluronic acid and the trimethylsiloxy silicate ester is utilized, so that the film-forming speed of the base product is moderate, and the base product has good makeup durability and concealing, waterproof and skin-attaching effects.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to a modified colorant, a long-lasting base makeup product and a preparation method thereof. Background Art

[0002] Both foundation and cushion makeup are base makeup cosmetics that can form a smooth covering layer on the skin surface to cover or conceal facial blemishes such as freckles, acne, and acne marks, making the skin look even and delicate, and the skin tone is natural and appropriate. Liquid foundation and cushion makeup are common types of foundation. They are moist and light, easy to apply, and suitable for most skin types. In long-lasting base makeup, most products use the method of adding high levels of oil or water phase film formers to enhance the product's anti-migration ability to achieve the purpose of long-lasting makeup, but this will introduce undesirable skin feelings such as stickiness, heaviness, and difficulty in spreading.

[0003] Chinese invention patent application CN115969720A discloses a liquid foundation with significantly improved lasting makeup and skin-adhering effect and its production method. The raw materials for its preparation include the following components by weight percentage: 10-60% water; 3-12% polyol moisturizer; 5-30% oil emollient; 5-15% ITD-treated titanium dioxide, iron oxide red, yellow, and black; 0.5-15% trimethylsiloxysilicate; 0.1-10% ethanol; 0.10-1.5% thickener; 0.2-1.0% preservative; 0.01-0.10% flavor. The liquid foundation prepared by the method using titanium dioxide, iron oxide black, iron oxide red, and iron oxide yellow treated with isopropyl titanium triisostearate (referred to as ITD) and film-forming agent trimethylsiloxysilicate through an oil-in-water composite emulsifier can have a long-lasting makeup effect, and has an oil-control effect while being skin-friendly.

[0004] Another Chinese invention patent application CN112641659A discloses an efficient and long-lasting foundation and a preparation method thereof. The raw materials include, by weight ratio, phase A: 4-15% polydimethylsiloxane, 0.5-10% trimethylsiloxysilicate, 2-12% moisturizer, 3-15% emulsifier, 0.5-4% phenyl trimethicone, 0.1-5% glycerol derivative, 0.2-2% magnesium sulfate, 0.5-2% disteardimethylamine hectorite, 0.1-0.8% ethanol, 0.01-2% thickener, 0.02-0.2% allantoin, 0.05-2% emollient, 0.05-2% filler, 0.1-0.6% bulking agent, 0.03-0.6% preservative, 0.1% flavor; the balance is made up of water; phase B: 10-17% colorant.

[0005] Another Chinese invention patent application CN117064797A discloses a long-lasting makeup liquid foundation and a preparation method thereof. The long-lasting makeup liquid foundation is composed of the following raw materials in weight percentage: emulsifier A 0.5-3.0%, emulsifier B 0.3-1.0%, volatile oil 3-20%, non-volatile oil 1-10%, functional additive 0.1-6%, oil phase thickener 0.1-1%, colorant 0.1%-8%, moisturizer 2-10%, emulsion stabilizer 0.5-2%, preservative 0.1-1%, and the balance is water; the functional additives are polydimethylsiloxane / vinyl polydimethylsiloxane cross-linked polymer, methyl methacrylate cross-linked polymer and mica; the formula is simple, the ratio is strict, the components interact with each other, the anti-migration performance of the obtained foundation is enhanced, and the long-lasting makeup effect is excellent.

[0006] However, the liquid foundation of the above patent pursues a long-lasting makeup effect, resulting in a hard and sticky makeup texture and poor skin feel. In view of this, the art urgently needs a long-lasting makeup base product with stronger anti-migration ability, dry skin feel, good concealing effect, and water and sweat resistance. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a modified colorant, a long-lasting base makeup product and a preparation method thereof.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0009] A modified colorant, the preparation method of the modified colorant comprises the following steps: reacting the colorant, a surfactant and a solvent under a nitrogen atmosphere to obtain the modified colorant.

[0010] Preferably, the surfactant includes a polymer surfactant and a zwitterionic surfactant.

[0011] Preferably, the polymer surfactant includes one or more of acrylate copolymers, ethylene-acrylate copolymers, ethylene-acrylate-maleic anhydride copolymers, ethylene-acrylate-glycidyl ester copolymers, ethylene-acrylic acid copolymers and acrylic acid homopolymers.

[0012] More preferably, the polymer surfactant is an acrylate polymer.

[0013] More preferably, the acrylic acid ester polymer is ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer.

[0014] Preferably, the zwitterionic surfactant comprises one or more of alkyl betaine, amidopropyl betaine and hydroxysulfobetaine.

[0015] More preferably, the zwitterionic surfactant is selected from one or more alkyl betaines with a carbon chain length of C10-C18.

[0016] More preferably, the alkyl betaine is lauryl hydroxysulfobetaine, tetradecyl dimethyl betaine or cetyl betaine.

[0017] Preferably, the molar ratio of the acrylate polymer to the alkyl betaine is 5-10:1-5.

[0018] More preferably, the molar ratio of the acrylate polymer to the alkyl betaine is 8-10:3-5.

[0019] More preferably, the molar ratio of the acrylate polymer to the alkyl betaine is 2:1.

[0020] Preferably, the colorant includes at least one of titanium dioxide, red iron oxide, yellow iron oxide and black iron oxide.

[0021] Preferably, the solvent is selected from one or more of propylene glycol, ethylene glycol and ethanol.

[0022] More preferably, the solvent is ethylene glycol or ethanol.

[0023] Preferably, the mass volume ratio of the colorant, surfactant and solvent is 10-50g:20-50ml:100-400ml.

[0024] Preferably, the reaction temperature is 60-80° C., and the reaction time is 0.5-2 h.

[0025] Preferably, the reaction needs to be stirred, and after the reaction is completed, filtering and drying are performed.

[0026] Preferably, the stirring speed is 300-600 rpm.

[0027] The present invention also provides a long-lasting base makeup product, comprising the modified colorant and auxiliary materials acceptable in cosmetics.

[0028] Preferably, the base makeup product is a primer, BB cream, liquid foundation, powder cream, air cushion BB cream, air cushion liquid foundation, air cushion powder cream, foundation cream, liquid concealer, concealer stick, concealer cream or setting spray.

[0029] Preferably, the auxiliary materials include film formers, skin conditioners, skin feel regulators, emollients, emulsifiers, humectants, thickeners, antioxidants, preservatives and water.

[0030] Preferably, the film former comprises hydroxypropyltrimonium chloride hyaluronic acid and trimethylsiloxysilicate.

[0031] Preferably, the skin conditioning agent includes at least one of jojoba oil, Centella asiatica extract, Camellia japonica extract and red rice extract.

[0032] More preferably, the skin conditioning agent comprises jojoba oil and red rice extract.

[0033] Preferably, the skin feel modifier comprises at least one of silicon dioxide, polymethylsilsesquioxane, polydimethylsiloxane / vinyl dimethicone crosspolymer, starch and synthetic fluorphlogopite.

[0034] Preferably, the emollient includes at least one of dimethicone, diphenylsiloxyphenyl trimethicone, diethylhexyl sebacate and isotridecanol isononanoate.

[0035] Preferably, the emulsifier includes at least one of lauryl PEG-10 tris(trimethylsiloxy)silylethyl dimethicone, PEG / PPG-18 / 18 dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, PEG-10 dimethicone, polyglyceryl-3 diisostearate and sorbitan sesquioleate.

[0036] Preferably, the moisturizer is selected from at least one of glycerin, butylene glycol and 1,2-hexanediol.

[0037] Preferably, the thickener is selected from at least one of stearalkonium hectorite, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer and disteardimonium hectorite.

[0038] Preferably, the antioxidant is selected from at least one of tocopherol, pentaerythritol tetrakis (di-tert-butyl hydroxyhydrocinnamate) and tocopherol acetate.

[0039] Preferably, the preservative is p-hydroxyacetophenone.

[0040] Preferably, the base makeup product comprises the following components by mass percentage: 1-20% modified colorant, 1-15% film former, 0.1-10% skin conditioner, 1-4% skin feel regulator, 10-25% emollient, 2.5-6% emulsifier, 3-8% moisturizer, 0.5-2% thickener, 0.1-2% antioxidant, 0.2-0.5% preservative and the balance water to 100%.

[0041] More preferably, the base makeup product comprises the following components, measured by mass percentage: 10-15% modified colorant, 5-12% film former, 2-4% skin conditioner, 1-2% skin feel regulator, 15-20% emollient, 4.5-5% emulsifier, 7-8% moisturizer, 0.5-1% thickener, 0.1-0.6% antioxidant, 0.3-0.5% preservative and the balance water to 100%.

[0042] The present invention also provides a method for preparing the above-mentioned long-lasting base makeup product, comprising the following steps:

[0043] (1) firstly mixing the modified colorant with a skin feel regulator, an emollient, a film former, a skin conditioner, an emulsifier, a thickener and an antioxidant to obtain a mixture 1;

[0044] (2) Finally, dissolve the moisturizer and preservative in water, add the mixture to mixture 1, and mix well to obtain the product.

[0045] Preferably, the mixing in step (1) needs to be homogenized and heated to 65-70°C.

[0046] Preferably, the temperature of the water in step (2) is 65-70°C.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] (1) The modified colorant provided by the present invention can improve the anti-migration property of base makeup products, so that the base makeup products have good blemish concealing and waterproof effects, and achieve better long-lasting makeup effects.

[0049] (2) The present invention also provides a long-lasting base makeup product. By selecting hydroxypropyltrimethylammonium chloride hyaluronic acid and trimethylsiloxysilicate as film-forming agents and utilizing the synergistic effect of the two, the base makeup product has a moderate film-forming speed, a uniformly dispersed texture, a dry feel on the skin, and a non-sticky feel on the skin after film formation. It has good makeup durability and blemish-covering, waterproof and skin-adhering effects.

[0050] (3) The base makeup product of the present invention has a simple preparation process, good skin feel and good long-lasting makeup effect. DETAILED DESCRIPTION

[0051] It is worth noting that the raw materials used in the present invention are all common commercial products. Among them, camellia extract, with an effective substance content of 10:1, was purchased from Zhongpeptide Biotechnology Co., Ltd.; jojoba oil, with a content of 98%, was purchased from Hansuyuan Biotechnology Co., Ltd.; Centella asiatica extract, with an effective substance content of 10:1, was purchased from Shaanxi Kanghe Biotechnology Co., Ltd.; red rice extract, the preparation method refers to Chinese invention patent CN202410765704.1.

[0052] Example 1

[0053] A long-lasting makeup base product, comprising the following components by mass percentage:

[0054] Modified colorant 12%;

[0055] Film former: Hydroxypropyltrimonium chloride hyaluronic acid 6% and trimethylsiloxysilicate 5%;

[0056] Skin Conditioners: Jojoba Oil 2% and Red Rice Extract 1%;

[0057] Skin feel regulator: Silicon dioxide 2%;

[0058] Emollients: Isotridecyl Isononanoate 5%, Dimethicone 12%, and Diphenylsiloxy Phenyl Trimethicone 3%;

[0059] Emulsifier: Lauryl PEG-10 tris(trimethylsiloxy)silylethyl dimethicone 3% and cetyl PEG-10 dimethicone 1.5%;

[0060] Humectants: glycerin 3%, butylene glycol 4% and 1,2 hexanediol 0.5%;

[0061] Thickener: Disteardimethylammonium hectorite 0.5%;

[0062] Antioxidant: Tocopheryl acetate 0.2%;

[0063] Preservative: p-hydroxyacetophenone 0.3%;

[0064] The balance is made up to 100% with water.

[0065] The preparation method of the above modified colorant is as follows:

[0066] Under a nitrogen atmosphere, 40 g of a colorant (composed of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide in a mass ratio of 30:6.5:2.5:1) and 25 ml of a surfactant (composed of ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer and tetradecyl dimethyl betaine in a molar ratio of 2:1) were placed in 300 ml of ethylene glycol solution, and reacted at 60°C and 300 rpm for 1 hour. After the reaction was completed, the reaction was filtered and dried to obtain the product.

[0067] The preparation method of the above base makeup product comprises the following steps:

[0068] (1) firstly mix the modified colorant with a skin feel regulator, an emollient, a film former, a skin conditioner, an emulsifier, a thickener and an antioxidant at 70° C. and homogenize at 3000 rpm for 25 min to obtain a mixture 1;

[0069] (2) Finally, dissolve the moisturizer and preservative in 70° C. water, add the mixture to mixture 1, and mix well to obtain the product.

[0070] Example 2

[0071] A long-lasting makeup base product, comprising the following components by mass percentage:

[0072] Modified colorant 10%;

[0073] Film former: Hydroxypropyltrimonium chloride hyaluronic acid 3% and trimethylsiloxysilicate 2%;

[0074] Skin Conditioning Agents: Jojoba Oil 2% and Camellia Extract 1%;

[0075] Skin feel modifiers: Polymethylsilsesquioxane 1% and Dimethicone / Vinyl Dimethicone Crosspolymer 0.5%;

[0076] Emollients: Isotridecyl Isononanoate 5%, Dimethicone 10% and Diethylhexyl Sebacate 5%;

[0077] Emulsifier: Cetyl PEG / PPG-10 / 1 Dimethicone 3.5% and Polyglyceryl-3 Diisostearate 1.5%;

[0078] Humectants: glycerin 3%, butylene glycol 4% and 1,2 hexanediol 0.5%;

[0079] Thickener: Vinyl Dimethicone / Methicone Silsesquioxane Crosspolymer 0.5%;

[0080] Antioxidant: pentaerythritol tetra(di-tert-butyl hydroxyhydrocinnamate) 0.1%;

[0081] Preservative: p-hydroxyacetophenone 0.4%;

[0082] The balance is made up to 100% with water.

[0083] The preparation method of the above modified colorant is as follows:

[0084] Under a nitrogen atmosphere, 50 g of a colorant (composed of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide in a mass ratio of 38:9:2:1) and 50 ml of a surfactant (composed of ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer and lauryl hydroxysulfobetaine in a molar ratio of 5:1) were placed in 400 ml of an ethylene glycol solution, and reacted at 80°C and a rotation speed of 300 rpm for 2 h. After the reaction was completed, the reaction was filtered and dried to obtain the product.

[0085] The preparation method of the above base makeup product comprises the following steps:

[0086] (1) firstly mix the modified colorant with a skin feel regulator, an emollient, a film former, a skin conditioner, an emulsifier, a humectant, a thickener and an antioxidant at 70° C. and homogenize at 3000 rpm for 15 minutes to obtain a mixture 1;

[0087] (2) Finally, dissolve the moisturizer and preservative in 70° C. water, add the mixture to mixture 1, and mix well to obtain the product.

[0088] Example 3

[0089] A long-lasting makeup base product, comprising the following components by mass percentage:

[0090] Modified colorant: 15%;

[0091] Film formers: Hydroxypropyltrimonium chloride hyaluronic acid 6% and trimethylsiloxysilicate 6%;

[0092] Skin Conditioning Agents: Centella Asiatica Extract 1% and Red Rice Extract 2%;

[0093] Skin feel regulator: polymethylsilsesquioxane 0.5% and synthetic fluorphlogopite 0.5%;

[0094] Emollients: Dimethicone 10%, Isotridecanyl Isononanoate 5%, and Diphenylsiloxy Phenyl Trimethicone 5%;

[0095] Emulsifier: PEG-10 Dimethicone 3% and Cetyl PEG / PPG-10 / 1 Dimethicone 2%;

[0096] Humectants: glycerin 3%, butylene glycol 4% and 1,2 hexanediol 0.5%;

[0097] Thickener: stearalkonium hectorite 0.5%;

[0098] Antioxidants: pentaerythritol tetra(di-tert-butyl hydroxyhydrocinnamate) 0.5% and tocopherol acetate 0.1%;

[0099] Preservative: p-hydroxyacetophenone 0.5%;

[0100] The balance is made up to 100% with water.

[0101] The preparation method of the above modified colorant is as follows:

[0102] Under a nitrogen atmosphere, 10 g of a colorant (composed of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide in a mass ratio of 5.5:2.5:1.5:0.5) and 20 ml of a surfactant (composed of ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer and cetyl betaine in a molar ratio of 3:0.5) were placed in 100 ml of ethylene glycol solution, and reacted at 80°C and 600 rpm for 0.5 h. After the reaction was completed, the reaction was filtered and dried to obtain the product.

[0103] The preparation method of the above base makeup product comprises the following steps:

[0104] (1) firstly mix the modified colorant with a skin feel regulator, an emollient, a film former, a skin conditioner, an emulsifier, a humectant, a thickener and an antioxidant at 70° C. and homogenize at 3000 rpm for 15 minutes to obtain a mixture 1;

[0105] (2) Finally, dissolve the moisturizer and preservative in 70° C. water, add the mixture to mixture 1, and mix well to obtain the product.

[0106] Table 1 Example 1-3 formulation

[0107]

[0108]

[0109]

[0110] Comparative Examples 1-4

[0111] The formula of a long-lasting base makeup product of Comparative Examples 1-4, calculated by mass percentage, is shown in Table 2.

[0112] Table 2 Comparative Examples 1-4 Formula

[0113]

[0114]

[0115] The preparation method of the modified colorant of Comparative Example 1 is as follows:

[0116] Under a nitrogen atmosphere, 40 g of a colorant (composed of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide in a mass ratio of 30:6.5:2.5:1) and 25 ml of a surfactant (ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer) were placed in 300 ml of an ethylene glycol solution, and reacted at 60°C and 300 rpm for 1 h. After the reaction was completed, the product was filtered and dried.

[0117] The preparation method of the modified colorant of Comparative Example 2 is as follows:

[0118] Under a nitrogen atmosphere, 40 g of a colorant (composed of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide in a mass ratio of 30:6.5:2.5:1) and 25 ml of a surfactant (tetradecyl dimethyl betaine) were placed in a 300 ml ethylene glycol solution, and reacted at 60°C and 300 rpm for 1 h. After the reaction was completed, the reaction was filtered and dried to obtain the product.

[0119] The preparation methods of the modified colorants of Comparative Examples 3 and 4 are the same as that of Example 1.

[0120] The preparation methods of the base makeup products of Comparative Examples 1-4 are the same as that of Example 1.

[0121] Test Case

[0122] 70 subjects were recruited, the ages of the subjects were concentrated between 25 and 30 years old, and the skin of each subject was oily skin. The 70 subjects were randomly divided into 7 groups, with 10 people in each group. The subjects in each group tried the base makeup products of Examples 1-3 and Comparative Examples 1-4, respectively. After using the same skin care products according to the same process for skin care, the corresponding base makeup products were tried according to the conventional makeup process. The subjects sat quietly for 6 hours in an environment of 20-22°C.

[0123] 1. Oil control effect test

[0124] The skin oil tester SM815 was used to test the oil secretion of the forehead of the subjects immediately after applying makeup and 6 hours after applying makeup (unit: μg / cm 2 ), the test results are shown in Table 3.

[0125] Table 3 Oil control effect test results

[0126]

[0127]

[0128] Note: Compared with Example 1, ** Indicates p<0.01.

[0129] As shown in Table 3, the oil control effect of Examples 1-3 is better than that of Comparative Examples 1-4, indicating that the base makeup product of the present invention has a good long-lasting makeup effect. Among them, the test results of Example 1 and Comparative Examples 1-2 show that the modified colorant obtained by mixing with the colorant using the synergistic effect between the surfactant ammonium acryloyldimethyltaurate / vinyl pyrrolidone copolymer and tetradecyl dimethyl betaine significantly improves the anti-migration property of the base makeup product, so that the base makeup product achieves a better long-lasting makeup effect.

[0130] 2. Sensory evaluation

[0131] Concealer and skin feel effect evaluation: The subjects tried the corresponding makeup base products, conducted descriptive sensory evaluation, observed their concealer power and scored them from 0 to 9 points, where 9 points was the best concealer effect. The skin adhesion of the face was scored from 0 to 9 points, where 9 points was the best skin adhesion effect, and the final results were averaged.

[0132] Evaluation of oil control and makeup lasting effect: observe whether the subject's face is oily and makeup is fading, and then evaluate the makeup effect by scoring (0-9 points, the higher the score, the longer the makeup lasts), and take the average value of the final result.

[0133] Oil absorption (μg / cm 2 )Test method: Wipe the subject's forehead three times with ordinary oil-absorbing paper, and then use the skin oil tester SM815 to test the oil absorption of the oil-absorbing paper. The more oil is absorbed, the worse the oil control effect.

[0134] The sensory evaluation scoring criteria are shown in Table 4, and the evaluation results are shown in Table 5.

[0135] Table 4 Sensory evaluation scoring criteria

[0136]

[0137] Table 5 Oil control and makeup lasting test results

[0138]

[0139]

[0140] Note: Compared with Example 1, * indicates p<0.05, ** Indicates p<0.01.

[0141] It can be seen from Table 5 that, compared with Comparative Examples 1-4, the makeup lasting effect of the base makeup products prepared in Examples 1-3 is significantly improved, and at the same time, the concealing power and oil absorption are also improved to a certain extent.

[0142] It can be seen from Example 1 and Comparative Examples 1 and 2 that the concealing power, skin adhesion and long-lasting effect of Example 1 are significantly improved, indicating that the modified colorant makes the base makeup product have good concealing, waterproof and long-lasting effects.

[0143] It can be seen from Example 1 and Comparative Examples 3 and 4 that by selecting hydroxypropyltrimethylammonium chloride hyaluronic acid and trimethylsiloxysilicate as film-forming agents, the base makeup product has a moderate film-forming speed, a uniformly dispersed texture, a dry skin feel, and a non-sticky skin feel after film formation, so that the base makeup product has good makeup durability and skin adhesion.

[0144] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A modified colorant, characterized in that: The preparation method of the modified colorant comprises the following steps: reacting the colorant, a surfactant and a solvent under a nitrogen atmosphere to obtain the modified colorant.

2. The modified colorant according to claim 1, characterized in that The surfactants include polymeric surfactants and zwitterionic surfactants.

3. The modified colorant according to claim 2, characterized in that The polymer surfactant includes one or more of acrylate copolymers, ethylene-acrylate copolymers, ethylene-acrylate-maleic anhydride copolymers, ethylene-acrylate-glycidyl ester copolymers, ethylene-acrylic acid copolymers and acrylic acid homopolymers; the zwitterionic surfactant includes one or more of alkyl betaines, amidopropyl betaines and hydroxysulfonates.

4. The modified colorant according to claim 3, characterized in that The polymer surfactant is an acrylate polymer, the zwitterionic surfactant is selected from one or more alkyl betaines with a carbon chain length of C10-C18, and the molar ratio of the acrylate polymer to the alkyl betaine is 5-10:1-5.

5. The modified colorant according to claim 1, characterized in that The colorant includes at least one of titanium dioxide, red iron oxide, yellow iron oxide and black iron oxide, the solvent is selected from one or more of propylene glycol, ethylene glycol and ethanol, the mass volume ratio of the colorant, surfactant and solvent is 10-50g:20-50ml:100-400ml, the reaction temperature is 60-80°C, the reaction time is 0.5-2h, the reaction needs to be stirred, and filtering and drying are performed after the reaction is completed, and the stirring speed is 300-600rpm.

6. A long-lasting makeup base product, characterized in that: The invention comprises the modified colorant according to any one of claims 1 to 5 and auxiliary materials acceptable in cosmetics.

7. The base makeup product according to claim 6, characterized in that: The base makeup product is a primer, BB cream, liquid foundation, powder cream, air cushion BB cream, air cushion liquid foundation, air cushion powder cream, foundation cream, liquid concealer, concealer stick, concealer cream or setting spray, and the auxiliary materials include film formers, skin conditioners, skin feel regulators, emollients, emulsifiers, humectants, thickeners, antioxidants, preservatives and water.

8. The base makeup product according to claim 7, characterized in that: The film former includes hydroxypropyltrimonium chloride hyaluronic acid and trimethylsiloxysilicate, and the skin conditioning agent includes at least one of jojoba oil, centella asiatica extract, camellia extract and red rice extract.

9. The base makeup product according to claim 7, wherein the skin feel regulator comprises at least one of silicon dioxide, polymethylsilsesquioxane, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, starch and synthetic fluorphlogopite; the emollient comprises at least one of polydimethylsiloxane, diphenylsiloxyphenyl trimethicone, diethylhexyl sebacate and isotridecyl isononanoate; the emulsifier comprises lauryl PEG-10 tris(trimethylsiloxy)silylethyl polydimethylsiloxane, PEG / PPG-18 / 18 polydimethylsiloxane, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, polyglyceryl-3 diisostearate and sorbitan sesquioleate; the moisturizer is selected from at least one of glycerin, butylene glycol and 1,2-hexanediol; the thickener is selected from at least one of stearalkonium hectorite, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer and disteardimonium hectorite; the antioxidant is selected from at least one of tocopherol, pentaerythritol tetra(di-tert-butyl hydroxyhydrocinnamate) and tocopheryl acetate; the preservative is p-hydroxyacetophenone.

10. The base makeup product according to any one of claims 7 to 9, characterized in that: The long-lasting makeup base comprises the following components by mass percentage: 1-20% of a modified colorant, 1-15% of a film former, 0.1-10% of a skin conditioner, 1-4% of a skin feel regulator, 10-25% of an emollient, 2.5-6% of an emulsifier, 3-8% of a moisturizer, 0.5-2% of a thickener, 0.1-2% of an antioxidant, 0.2-0.5% of a preservative, and the balance is made up to 100% by water.

11. A method for preparing a base makeup product according to any one of claims 7 to 10, characterized in that: The steps include: (1) firstly mixing the modified colorant with a skin feel regulator, an emollient, a film former, a skin conditioner, an emulsifier, a thickener and an antioxidant to obtain a mixture 1; (2) Finally, the moisturizer and preservative are dissolved in water, added to the mixture 1, and mixed well to obtain the product.

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