A kind of sunscreen and its preparation and application

Abstract

The present invention provides a sunscreen and its preparation and application. The present invention specifically selects the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, and supplements them with other ingredients. The sunscreen obtained not only has a high SPF value and stability, but also ensures that it is evenly applied and has a good sensory experience such as a refreshing and non-sticky skin feel, thereby better exerting the sunscreen effect. In addition, compared with the use of other solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, the sunscreen of the present invention can simultaneously have a high SPF value, better stability, and better sensory experience, and can better exert the sunscreen effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of cosmetics, and more specifically, relates to a sunscreen and its preparation and application. Background Art

[0002] If the skin is exposed to high-intensity ultraviolet rays for a long time, it may experience symptoms such as sunburn, aging, and spots. Therefore, sun protection is essential for protecting skin health.

[0003] Using sunscreen is one of the most commonly used sun protection methods. The sun protection effect of sunscreen is usually characterized by the SPF value. For example, "SPF50+" means that the sunscreen has a strong ability to protect against ultraviolet rays and has a relatively excellent sun protection effect. However, SPF50+ sunscreens are often thick and heavy, and are prone to problems such as stickiness on the skin, which seriously affects consumers' sensory experience. Summary of the invention

[0004] The present invention aims to provide a sunscreen by specifically selecting the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity regulators, and supplemented with other ingredients. The obtained sunscreen not only has a higher SPF value (reaching SPF50+) and stability, but also ensures better sensory experience such as uniform application and refreshing and non-sticky skin feel, thereby better exerting the sunscreen effect.

[0005] The first object of the present invention is to provide a sunscreen.

[0006] The second object of the present invention is to provide a method for preparing the sunscreen.

[0007] The third object of the present invention is to provide application of the above sunscreen in sun protection.

[0008] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0009] The present invention provides a sunscreen, wherein the pH value of the sunscreen is 6-7, and the sunscreen comprises the following components in percentage by mass: 4.5%-7.4% of solid sunscreen, 14%-21.5% of liquid sunscreen, 1%-9% of liquid emollient, 1.2%-2.5% of oil phase thickener, 0.17%-0.45% of viscosity regulator, 2.5%-4% of emulsifier, 0.2%-1% of film former, 0.5%-2% of nano sunscreen, 4%-8% of polyol, and water is added to 100%;

[0010] Among them, the solid sunscreen is a mixture of butyl methoxydibenzoylmethane and ethylhexyl triazone, and the mass proportions of butyl methoxydibenzoylmethane and ethylhexyl triazone in the sunscreen are 2% to 4% and 2.5% to 3.4% respectively;

[0011] The liquid sunscreen is two or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, and isoamyl p-methoxycinnamate, and the mass proportions of ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, and isoamyl p-methoxycinnamate in the sunscreen are 0-9%, 0-4.5%, 0-9%, and 0-8%, respectively;

[0012] The liquid emollient is one or more of dibutyl adipate, butylene glycol dicaprylate / dicaprate, cocoglyceryl esters, and neopentyl glycol diheptanoate;

[0013] The oil phase thickener is a mixture of an oil phase thickener A and an oil phase thickener B, and the mass proportions of the oil phase thickener A and the oil phase thickener B in the sunscreen are 0.8% to 1.5% and 0.4% to 1% respectively; the oil phase thickener A is cetearyl alcohol or cetyl alcohol, and the oil phase thickener B is behenyl alcohol or arachidyl alcohol;

[0014] The viscosity modifier is a mixture of viscosity modifier A and acrylates / C10-30 alkyl acrylate cross-linked polymer, and the mass proportions of viscosity modifier A and acrylates / C10-30 alkyl acrylate cross-linked polymer in the sunscreen are 0.02% to 0.15% and 0.15% to 0.3% respectively; the viscosity modifier A is xanthan gum or cellulose gum.

[0015] Among them, "Acrylates / C10-30 Alkyl Acrylate Crosspolymer" is the "Acrylates / C10-30 Alkyl Acrylate Crosspolymer" in the "Catalogue of Used Cosmetic Ingredients (2021 Edition)".

[0016] The present invention specifically selects the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, and supplements them with other ingredients, so that the sunscreen cream obtained not only has a higher SPF value and stability, but also ensures that it is evenly applied and has a better sensory experience such as a refreshing and non-sticky skin feel, thereby better exerting the sunscreen effect. In addition, compared with the use of other solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, the sunscreen cream of the present invention can simultaneously have a higher SPF value, better stability, and better sensory experience, and can better exert the sunscreen effect.

[0017] Preferably, the emulsifier is two or three of glyceryl stearate, PEG-100 stearate, polyglyceryl-3 methyl glucose distearate and polyglyceryl-10 pentamethylenetetradecanoate, and the mass proportions of glyceryl stearate, PEG-100 stearate, polyglyceryl-3 methyl glucose distearate and polyglyceryl-10 pentamethylenetetradecanoate in the sunscreen are 0-2%, 0-2%, 0-0.5% and 0-1.5%, respectively.

[0018] Preferably, the film former is one or both of VP / eicosene copolymer and poly C10-30 alkyl alcohol acrylate.

[0019] Preferably, the nano sunscreen is methylene bis-benzotriazolyl tetramethylbutylphenol, and the average particle size is less than 200 nm.

[0020] More preferably, the average particle size is ≤160 nm.

[0021] Preferably, the polyol is one or more of glycerol, butanediol, and 1,3-propylene glycol.

[0022] Preferably, the pH is adjusted by a pH adjuster permitted for use in cosmetics, such as arginine, sodium hydroxide, and the like.

[0023] Preferably, the pH of the sunscreen is 6-7, and comprises the following components in percentage by mass: 4.5%-7.4% solid sunscreen, 14%-21.5% liquid sunscreen, 1%-9% liquid emollient, 1.2%-2.5% oil phase thickener, 0.17%-0.45% viscosity regulator, 2.5%-4% emulsifier, 0.2%-1% film former, 0.5%-2% nano sunscreen, 4%-8% polyol, 0.3%-1% skin feel regulator, and water is added to 100%.

[0024] More preferably, the skin feel regulator is one or both of aluminum starch octenylsuccinate and polymethylsiloxane.

[0025] Preferably, the pH of the sunscreen is 6-7, and comprises the following components in percentage by mass: 4.5%-7.4% solid sunscreen, 14%-21.5% liquid sunscreen, 1%-9% liquid emollient, 1.2%-2.5% oil phase thickener, 0.17%-0.45% viscosity regulator, 2.5%-4% emulsifier, 0.2%-1% film former, 0.5%-2% nano sunscreen, 4%-8% polyol, 0.5%-3% active ingredient, and water is supplemented to 100%.

[0026] More preferably, the active ingredient is an oil-soluble active ingredient and / or a water-soluble active ingredient.

[0027] More preferably, the oil-soluble active ingredient is one or more of tocopherol acetate, bisabolol, and tocopherol.

[0028] More preferably, the water-soluble active ingredient is one or more of allantoin, niacinamide, ectoine, and tranexamic acid.

[0029] Preferably, the pH of the sunscreen is 6-7, and comprises the following components in percentage by mass: 4.5%-7.4% solid sunscreen, 14%-21.5% liquid sunscreen, 1%-9% liquid emollient, 1.2%-2.5% oil phase thickener, 0.17%-0.45% viscosity regulator, 2.5%-4% emulsifier, 0.2%-1% film former, 0.5%-2% nano sunscreen, 4%-8% polyol, 0.8%-1% preservative, 0.05%-0.3% flavor, and water is supplemented to 100%.

[0030] More preferably, the preservative is two or three of phenoxyethanol, ethylhexylglycerin and p-hydroxyacetophenone.

[0031] More preferably, the mass proportions of phenoxyethanol, ethylhexylglycerin and p-hydroxyacetophenone in the sunscreen are 0-0.7%, 0-0.1% and 0-0.4% respectively.

[0032] Preferably, the pH of the sunscreen is 6-7, and comprises the following components in percentage by mass: 4.5%-7.4% solid sunscreen, 14%-21.5% liquid sunscreen, 1%-9% liquid emollient, 1.2%-2.5% oil phase thickener, 0.17%-0.45% viscosity regulator, 2.5%-4% emulsifier, 0.2%-1% film former, 0.5%-2% nano sunscreen, 4%-8% polyol, 0.3%-1% skin feel regulator, 0.5%-3% active ingredient, 0.8%-1% preservative, 0.05%-0.3% fragrance, and water is supplemented to 100%.

[0033] Based on this, the present invention also provides a method for preparing the above sunscreen, comprising the following steps:

[0034] S1. Oil phase: Mix solid sunscreen, liquid sunscreen, liquid emollient, oil phase thickener, emulsifier and film former at 70-75°C;

[0035] S2. Water phase: dissolving the viscosity modifier and polyol in water at 80-85°C;

[0036] S3. After heating the oil phase to 80-85° C., add the water phase, homogenize, add the nano sunscreen agent and mix well, and then adjust the pH to 6-7 to obtain the sunscreen.

[0037] In addition, as a preferred embodiment, the preparation method of the sunscreen comprises the following steps:

[0038] S1. Oil phase: Mix solid sunscreen, liquid sunscreen, liquid emollient, oil phase thickener, emulsifier, film former, optional skin feel modifier, and optional oil-soluble active ingredient at 70-75°C;

[0039] S2. Aqueous phase: dissolving a viscosity modifier, a polyol and an optional preservative in water at 80 to 85°C;

[0040] S3. After heating the oil phase to 80-85° C., add the aqueous phase, homogenize, add the nano sunscreen, optional flavor and optional water-soluble active ingredient, mix well, and then adjust the pH to 6-7 to obtain the sunscreen.

[0041] Preferably, S1 is: at 70-75° C., firstly mix the solid sunscreen, the liquid sunscreen and the liquid emollient, then add the oil phase thickener, the emulsifier and the film former, and then add the optional skin feel regulator and the optional oil-soluble active ingredient and mix.

[0042] Preferably, before the homogenization in S3, stirring is further performed, such as stirring at 600-800 rpm for 3-5 min.

[0043] Preferably, the homogenization in S3 is carried out at 8000-12000 rpm for 5-8 min.

[0044] Preferably, after the homogenization in S3, the temperature is further lowered, such as to below 55°C.

[0045] Preferably, the mixing speed in S3 is 300-350 rpm.

[0046] Preferably, after adjusting the pH in S3, the temperature is further lowered, such as to below 45°C.

[0047] The above-mentioned sunscreen not only has a high SPF value and stability, but also can ensure that it is evenly applied and has a better sensory experience such as a refreshing and non-sticky skin feel, thereby better exerting the sunscreen effect. Therefore, the application of the above-mentioned sunscreen in sun protection should also be within the protection scope of the present invention.

[0048] Preferably, the sunscreen is body sunscreen and / or facial sunscreen.

[0049] The present invention has the following beneficial effects:

[0050] 1. The present invention specifically selects the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity regulators, and adds other ingredients to obtain a sunscreen that not only has a high SPF value and stability, but also ensures that it is evenly applied and has a refreshing and non-sticky feel, thereby achieving a better sensory experience, thereby better exerting the sunscreen effect.

[0051] 2. Compared with other solid sunscreens, liquid sunscreens, liquid emollients, oil phase thickeners, and viscosity regulators, the sunscreen of the present invention can simultaneously have a higher SPF value, better stability, and better sensory experience, and can better exert the sunscreen effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a photo of the sunscreen obtained in Example 1 after application.

[0053] Figure 2 This is a photo of the sunscreen obtained in Comparative Example 1 after application.

[0054] Figure 3 This is a photo of the sunscreen obtained in Comparative Example 2 after application.

[0055] Figure 4 This is a photo of the sunscreen obtained in Comparative Example 3 after application.

[0056] Figure 5 This is a photo of the sunscreen obtained in Comparative Example 4 after application.

[0057] Figure 6 This is a photo of the sunscreen obtained in Comparative Example 5 after application.

[0058] Figure 7 This is a photo of the sunscreen obtained in Comparative Example 6 after application.

[0059] Figure 8 This is a photo of the sunscreen obtained in Comparative Example 7 after application.

[0060] Fig. 9 This is a photo of the sunscreen obtained in Comparative Example 8 after application.

[0061] Fig.10 This is a photo of the sunscreen obtained in Comparative Example 9 after application.

[0062] Fig.11 This is a photo of the sunscreen obtained in Comparative Example 10 after application.

[0063] Fig.12 This is a photo of the sunscreen obtained in Comparative Example 11 after application.

[0064] Fig.13 This is a photo of the sunscreen obtained in Comparative Example 12 after application. DETAILED DESCRIPTION

[0065] The present invention is further described below in conjunction with the accompanying drawings and specific examples, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0066] Unless otherwise specified, the reagents and materials used in the following examples are commercially available.

[0067] Example 1 Preparation of sunscreen

[0068] 1. Contains the following components in mass percentage

[0069] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0070] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0071] Liquid emollient: dibutyl adipate 1.5%;

[0072] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0073] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0074] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0075] Film former: VP / eicosene copolymer 0.5%;

[0076] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0077] Polyol: Butanediol 5%;

[0078] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0079] Make up to 100% with water.

[0080] 2. Preparation method

[0081] S1. Oil phase: at 75°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former and mix well;

[0082] S2. Water phase: dissolving the viscosity modifier and polyol in water at 85°C;

[0083] S3. After heating the oil phase to 85°C, add the aqueous phase, stir at 600 rpm for 3 min, homogenize at 10,000 rpm for 5 min, cool to 55°C, then add the nano sunscreen, mix at 300 rpm, adjust the pH to 6.5 with a pH adjuster, and cool to 45°C to obtain the sunscreen.

[0084] Example 2 Preparation of sunscreen

[0085] 1. Contains the following components in mass percentage

[0086] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 3.4% ethylhexyl triazone;

[0087] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 0.5%, octocrylene 4.5%;

[0088] Liquid emollient: dibutyl adipate 9%;

[0089] Oil phase thickener: cetearyl alcohol 0.8%, behenyl alcohol 0.4%;

[0090] Viscosity modifier: xanthan gum 0.15%, acrylates / C10-30 alkyl acrylate crosspolymer 0.3%;

[0091] Emulsifier: Glyceryl Stearate 2%, PEG-100 Stearate 2%;

[0092] Film former: VP / eicosene copolymer 0.2%;

[0093] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 132.6 nm) 2%;

[0094] Polyol: Butanediol 4%;

[0095] pH adjuster: Arginine, adjusts the pH of sunscreen to 7;

[0096] Make up to 100% with water.

[0097] 2. Preparation method

[0098] S1. Oil phase: at 75°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former and mix well;

[0099] S2. Water phase: dissolve the viscosity modifier and polyol in water at 80°C;

[0100] S3. After heating the oil phase to 80°C, add the aqueous phase, stir at 600 rpm for 5 min, homogenize at 12000 rpm for 5 min, cool to 55°C, then add the nano sunscreen, mix at 350 rpm, adjust the pH to 7 with a pH adjuster, cool to 45°C, and obtain the sunscreen.

[0101] Example 3 Preparation of sunscreen

[0102] 1. Contains the following components in mass percentage

[0103] Solid sunscreen: 2% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0104] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 3.5%, octocrylene 9%;

[0105] Liquid emollient: dibutyl adipate 1%;

[0106] Oil phase thickener: cetearyl alcohol 1.5%, behenyl alcohol 1%;

[0107] Viscosity modifier: xanthan gum 0.02%, acrylates / C10-30 alkyl acrylate crosspolymer 0.15%;

[0108] Emulsifier: Glyceryl Stearate 1.25%, PEG-100 Stearate 1.25%;

[0109] Film former: VP / eicosene copolymer 1%;

[0110] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0111] Polyol: Butanediol 8%;

[0112] pH adjuster: Arginine, adjusts the pH of sunscreen to 6;

[0113] Make up to 100% with water.

[0114] 2. Preparation method

[0115] S1. Oil phase: at 70°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former and mix well;

[0116] S2. Water phase: dissolving the viscosity modifier and polyol in water at 85°C;

[0117] S3. After heating the oil phase to 85°C, add the aqueous phase, stir at 800 rpm for 3 min, homogenize at 8000 rpm for 8 min, cool to 55°C, then add the nano sunscreen, mix at 300 rpm, adjust the pH to 6 with a pH adjuster, cool to 45°C, and obtain the sunscreen.

[0118] Example 4 Preparation of sunscreen

[0119] 1. Contains the following components in mass percentage

[0120] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0121] Liquid sunscreen: Octocrylene 8%, Isoamyl p-methoxycinnamate 8%;

[0122] Liquid emollients: dibutyl adipate 4%, butylene glycol dicaprylate / dicaprate 3%;

[0123] Oil phase thickener: cetyl alcohol 1%, arachidyl alcohol 0.5%;

[0124] Viscosity modifier: cellulose gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0125] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0126] Film former: VP / eicosene copolymer 0.5%;

[0127] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0128] Polyol: Butanediol 5%;

[0129] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0130] Make up to 100% with water.

[0131] 2. Preparation method

[0132] Same as Example 1.

[0133] Example 5 Preparation of sunscreen

[0134] 1. Contains the following components in mass percentage

[0135] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0136] Liquid sunscreen: 6% ethylhexyl methoxycinnamate, 3.5% ethylhexyl salicylate, 6% octocrylene, 6% isopentyl p-methoxycinnamate;

[0137] Liquid emollients: Cocoglyceryl 4%, Neopentyl Glycol Diheptanoate 3%;

[0138] Oil phase thickener: cetyl alcohol 1%, arachidyl alcohol 0.5%;

[0139] Viscosity modifier: cellulose gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0140] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0141] Film former: VP / eicosene copolymer 0.5%;

[0142] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0143] Polyol: Butanediol 5%;

[0144] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0145] Make up to 100% with water.

[0146] 2. Preparation method

[0147] Same as Example 1.

[0148] Example 6 Preparation of sunscreen

[0149] 1. Contains the following components in mass percentage

[0150] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0151] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0152] Liquid emollient: dibutyl adipate 1.5%;

[0153] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0154] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0155] Emulsifier: glyceryl stearate 0.5%, polyglyceryl-3 methyl glucose distearate 0.5%, polyglyceryl-10 pentastearate 1.5%;

[0156] Film former: VP / eicosene copolymer 0.5%;

[0157] Nano sunscreen: methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 0.5%;

[0158] Polyol: glycerol 5%;

[0159] pH adjuster: Sodium hydroxide, adjust the pH of sunscreen to 6.5;

[0160] Make up to 100% with water.

[0161] 2. Preparation method

[0162] Same as Example 1.

[0163] Example 7 Preparation of sunscreen

[0164] 1. Contains the following components in mass percentage

[0165] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0166] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0167] Liquid emollient: dibutyl adipate 1.5%;

[0168] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0169] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0170] Emulsifier: 1.5% glyceryl stearate, 1.5% PEG-100 stearate, 0.5% polyglyceryl-3 methyl glucose distearate;

[0171] Film former: Poly C10-30 alkyl acrylate 0.5%;

[0172] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0173] Polyol: 1,3-propylene glycol 5%;

[0174] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0175] Make up to 100% with water.

[0176] 2. Preparation method

[0177] Same as Example 1.

[0178] Example 8 Preparation of sunscreen

[0179] 1. Contains the following components in mass percentage

[0180] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0181] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0182] Liquid emollient: dibutyl adipate 1.5%;

[0183] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0184] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0185] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0186] Film former: VP / eicosene copolymer 0.5%;

[0187] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0188] Polyol: Butanediol 5%;

[0189] Skin feel regulator: aluminum starch octenylsuccinate 0.8%;

[0190] Oil-soluble active ingredients: Bisabolol 0.25%;

[0191] Water-soluble active ingredients: Niacinamide 2%;

[0192] Preservatives: phenoxyethanol 0.7%, ethylhexylglycerin 0.1%;

[0193] Flavor: Flavor 0.3%;

[0194] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0195] Make up to 100% with water.

[0196] 2. Preparation method

[0197] S1. Oil phase: at 75°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former and mix well, then add the skin feel regulator and oil-soluble active ingredients and mix well;

[0198] S2. Water phase: dissolve the viscosity modifier, polyol and preservative in water at 85°C;

[0199] S3. After heating the oil phase to 85°C, add the aqueous phase, stir at 600 rpm for 3 min, homogenize at 10,000 rpm for 5 min, cool to 55°C, then add the nano sunscreen, flavor and water-soluble active ingredients, mix at 300 rpm, adjust the pH to 6.5 with a pH adjuster, and cool to 45°C to obtain the sunscreen.

[0200] Example 9 Preparation of sunscreen

[0201] 1. Contains the following components in mass percentage

[0202] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0203] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0204] Liquid emollient: dibutyl adipate 1.5%;

[0205] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0206] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0207] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0208] Film former: VP / eicosene copolymer 0.5%;

[0209] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0210] Polyol: Butanediol 5%;

[0211] Skin feel regulator: aluminum starch octenylsuccinate 1%;

[0212] Water-soluble active ingredients: allantoin 0.2%, tranexamic acid 0.3%;

[0213] Preservatives: phenoxyethanol 0.7%, ethylhexylglycerin 0.1%;

[0214] Fragrance: 0.05%;

[0215] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0216] Make up to 100% with water.

[0217] 2. Preparation method

[0218] S1. Oil phase: at 75°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former, and then add the skin feel regulator;

[0219] S2. Water phase: dissolve the viscosity modifier, polyol and preservative in water at 85°C;

[0220] S3. After heating the oil phase to 85°C, add the aqueous phase, stir at 600 rpm for 3 min, homogenize at 10,000 rpm for 5 min, cool to 55°C, then add the nano sunscreen, flavor and water-soluble active ingredients, mix at 300 rpm, adjust the pH to 6.5 with a pH adjuster, and cool to 45°C to obtain the sunscreen.

[0221] Example 10 Preparation of sunscreen

[0222] 1. Contains the following components in mass percentage

[0223] Solid sunscreen: 4% butyl methoxydibenzoylmethane, 2.5% ethylhexyl triazone;

[0224] Liquid sunscreen: ethylhexyl methoxycinnamate 9%, ethylhexyl salicylate 4.5%, octocrylene 8%;

[0225] Liquid emollient: dibutyl adipate 1.5%;

[0226] Oil phase thickener: cetearyl alcohol 1%, behenyl alcohol 0.5%;

[0227] Viscosity regulator: xanthan gum 0.05%, acrylates / C10-30 alkyl acrylate crosspolymer 0.2%;

[0228] Emulsifier: Glyceryl Stearate 1.5%, PEG-100 Stearate 1.5%;

[0229] Film former: VP / eicosene copolymer 0.5%;

[0230] Nano sunscreen: Methylene bis-benzotriazolyl tetramethylbutylphenol (average particle size 160 nm) 1%;

[0231] Polyol: Butanediol 5%;

[0232] Skin feel regulator: polymethylsiloxane 0.3%;

[0233] Oil-soluble active ingredients: Tocopheryl acetate 1%;

[0234] Water-soluble active ingredients: niacinamide 1.5%, ectoine 0.5%;

[0235] Preservatives: phenoxyethanol 0.5%, ethylhexylglycerin 0.1%, p-hydroxyacetophenone 0.4%;

[0236] Flavor: Flavor 0.3%;

[0237] pH adjuster: Arginine, adjusts the pH of sunscreen to 6.5;

[0238] Make up to 100% with water.

[0239] 2. Preparation method

[0240] S1. Oil phase: at 75°C, mix the solid sunscreen, liquid sunscreen and liquid emollient, then add the oil phase thickener, emulsifier and film former and mix well, then add the skin feel regulator and oil-soluble active ingredients and mix well;

[0241] S2. Water phase: dissolve the viscosity modifier, polyol and preservative in water at 85°C;

[0242] S3. After heating the oil phase to 85°C, add the aqueous phase, stir at 600 rpm for 3 min, homogenize at 10,000 rpm for 5 min, cool to 55°C, then add the nano sunscreen, flavor and water-soluble active ingredients, mix at 300 rpm, adjust the pH to 6.5 with a pH adjuster, and cool to 45°C to obtain the sunscreen.

[0243] Comparative Example 1

[0244] Same as Example 1, except that the solid sunscreen is replaced by 5% ethylhexyl triazone.

[0245] Comparative Example 2

[0246] Same as Example 1, except that the solid sunscreen is replaced by: 4% of bis-ethylhexyloxyphenol methoxyphenyl triazine and 2.5% of ethylhexyl triazone.

[0247] Comparative Example 3

[0248] The same as Example 1, except that the solid sunscreen is replaced by: 3% butyl methoxydibenzoylmethane, 1.5% ethylhexyl triazone, 1.5% bis-ethylhexyloxyphenol methoxyphenyl triazine, and 2% diethylaminohydroxybenzoyl hexyl benzoate.

[0249] Comparative Example 4

[0250] Same as Example 1, except that the solid sunscreen is replaced by 4% butyl methoxydibenzoylmethane and 2.5% diethylhexyl butyramido triazone.

[0251] Comparative Example 5

[0252] Same as Example 1, except that the liquid sunscreen is replaced by: homosalate 9%, ethylhexyl salicylate 4.5%, and octocrylene 8%.

[0253] Comparative Example 6

[0254] Same as Example 1, except that the liquid sunscreen is replaced by: 9% ethylhexyl methoxycinnamate, 4.5% ethylhexyl salicylate, and 8% homosalate.

[0255] Comparative Example 7

[0256] Same as Example 1, except that the liquid emollient is replaced by 1.5% ethylhexyl palmitate.

[0257] Comparative Example 8

[0258] Same as Example 1, except that the liquid emollient is replaced by 1.5% isononyl isononanoate.

[0259] Comparative Example 9

[0260] Same as Example 1, except that the oil phase thickener is replaced by 2.5% behenyl alcohol.

[0261] Comparative Example 10

[0262] Same as Example 1, except that the oil phase thickener is replaced by 2.5% cetearyl alcohol.

[0263] Comparative Example 11

[0264] Same as Example 1, except that the viscosity modifier is replaced by 0.25% xanthan gum.

[0265] Comparative Example 12

[0266] 1. Contains the following components in mass percentage

[0267] Phase A: deionized water 41%, butanediol 2.5%, 1,2-pentanediol 1.5%, 1,2-hexanediol 0.3%, potassium cetyl phosphate 1%, hydrogenated lecithin 0.6%, ammonium acryloyldimethyltaurate / VP copolymer 0.25%, VP / acrylates / lauryl methacrylate copolymer 1%;

[0268] Phase B: 1% glyceryl stearate / PEG-100 stearate, 2.3% cetearyl alcohol, 5% diisopropyl sebacate, 3% butyl methoxydibenzoylmethane, 1.5% bis-ethylhexyloxyphenol methoxyphenyl triazine, 8% octocrylene, 3% ethylhexyl salicylate, 1.5% ethylhexyl triazone, 2% diethylaminohydroxybenzoyl hexyl benzoate, 6% methylene bis-benzotriazolyl tetramethylbutylphenol;

[0269] Phase C: Silica 1.8%, C30-45 Alkyl Cetearyl Dimethicone Crosspolymer 3%, Phenoxyethanol 0.5%, Fragrance 0.15%, Niacinamide 1%, Deionized Water 12.1%.

[0270] 2. Preparation method

[0271] S1. Add phase A into the water phase pot, heat to 80°C, and stir until completely dissolved;

[0272] S2. Add phase B into the oil phase pot, heat to 80°C, and stir until completely dissolved;

[0273] S3. The S1 product and the S2 product are pumped into an emulsifying pot, the two are fully stirred, and then homogenized at 10000 rpm until emulsified and kept warm;

[0274] S4. Stir the product of S3 and cool it down to 45°C. Add phase C into the emulsifying pot, stir evenly, and filter to obtain the product.

[0275] Test Example 1 Stability Test

[0276] The sunscreens obtained in Examples 1 to 10 and Comparative Examples 1 to 12 were placed in environments of -18, 5, 25, and 45° C. for 3 months, and then observed for unstable phenomena such as precipitation, oiliness, and coarsening. The results are shown in Table 1.

[0277] Table 1

[0278]

[0279] In the table, "OK" means that there is no unstable phenomenon such as precipitation, oiling, and coarsening.

[0280] It can be seen that the sunscreens obtained in Examples 1 to 10, Comparative Example 4, Comparative Examples 9 to 10, and Comparative Example 12 have better stability, while the sunscreens obtained in Comparative Examples 1 to 3, Comparative Examples 5 to 8, and Comparative Example 11 all have some instability to a greater or lesser extent, indicating that it is precisely because of the specific selection of the types and combinations of solid sunscreens, liquid sunscreens, and liquid emollients in the present invention, supplemented with other ingredients, that the sunscreen obtained can have such excellent stability.

[0281] Test Example 2 Sensory Evaluation

[0282] 10 evaluators (aged 20-35 years old) who had undergone 3 months of unified sensory evaluation training were selected to conduct sensory tests on the sunscreens obtained in Examples 1-10 and Comparative Examples 1-12, and the test environment was kept at a constant temperature and humidity (temperature 20-22°C, relative humidity 50%-60%). The same area on the inner side of the left arm of the evaluator was designated as the test area, and it was required that after each test of a sunscreen, the test area should be thoroughly cleaned, and the next sunscreen should be sensory evaluated after sitting in the test environment for 30 minutes.

[0283] Take a soybean-sized amount of the sunscreen obtained in Examples 1 to 10 and Comparative Examples 1 to 12, score the pick-up property of the sunscreen according to a standard of 0 to 25 points, and then apply it to the test area at a speed of 1 s / circle. After evenly applying (if it is still not evenly applied after more than 10 circles, 10 circles are taken as the end point of application), score the spreadability, greasy feeling and stickiness of the sunscreen according to a standard of 0 to 25 points, respectively. The average score of the 10 evaluators is taken, and finally the average scores of the four sensory indicators of pick-up, spreadability, greasy feeling and stickiness are added to obtain the total sensory score, as shown in Table 2. Among them, the evaluation of the difficulty of taking out the sunscreen from the container is from 0 points (difficult) to 25 points (easy); the evaluation of the difficulty of applying the sunscreen is from 0 points (difficult) to 25 points (easy); the evaluation of the oiliness of the skin after application is from 0 points (strong) to 25 points (weak); the evaluation of the stickiness is the degree of adhesion between the skin and the fingers after application, from 0 points (strong) to 25 points (weak).

[0284] Table 2

[0285]

[0286] It can be seen that the total sensory scores of the sunscreens obtained in Examples 1 to 10 are significantly better than those in Comparative Examples 1 to 12, indicating that it is precisely because of the specific selection of the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil phase thickeners, and viscosity regulators in the present invention, supplemented with other ingredients, that the obtained sunscreens have such an excellent sensory experience, are not only easy to take and apply, but also do not feel greasy or sticky on the skin after application.

[0287] Test Example 3: Spreading uniformity test

[0288] 13 volunteers with similar skin qualities (aged 20-35 years old) were selected, and a 4 cm × 5 cm area was drawn on the smooth part of the volunteers' arms as the test area. 0.1 g of the sunscreen obtained in Example 1 and Comparative Examples 1-12 was applied to the test area at a speed of 1 s / circle. After applying evenly (if the application was not even after more than 10 circles, 10 circles was taken as the end point of application), waited for 4 minutes, and then photographed in a dark environment with a Wood's lamp. The photos are shown in the figure. Figures 1 to 13 As shown. Among them, Figure 1 This is a photo of the sunscreen obtained in Example 1 after application. Figure 2 This is a photo of the sunscreen obtained in Comparative Example 1 after application. Figure 3 This is a photo of the sunscreen obtained in Comparative Example 2 after application. Figure 4 This is a photo of the sunscreen obtained in Comparative Example 3 after application. Figure 5 This is a photo of the sunscreen obtained in Comparative Example 4 after application. Figure 6 This is a photo of the sunscreen obtained in Comparative Example 5 after application. Figure 7 This is a photo of the sunscreen obtained in Comparative Example 6 after application. Figure 8 This is a photo of the sunscreen obtained in Comparative Example 7 after application. Fig. 9 This is a photo of the sunscreen obtained in Comparative Example 8 after application. Fig.10 This is a photo of the sunscreen obtained in Comparative Example 9 after application. Fig.11 This is a photo of the sunscreen obtained in Comparative Example 10 after application. Fig.12 This is a photo of the sunscreen obtained in Comparative Example 11 after application. Fig.13 This is a photo of the sunscreen obtained in Comparative Example 12 after application.

[0289] It can be seen that the sunscreen obtained in Example 1 is completely uniform within 10 circles of application, while the comparative examples 1 to 12 still have more or less unevenness, particles, mud and other problems after 10 circles of application, indicating that it is precisely because of the specific selection of the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil phase thickeners, and viscosity regulators in the present invention, supplemented with other ingredients, that the obtained sunscreen has such excellent application uniformity and can be quickly applied evenly.

[0290] Test Example 4 Sunscreen performance test

[0291] According to the determination method of sun protection index (SPF value) of sunscreen cosmetics in the "Technical Specification for Safety of Cosmetics" (2015 edition), the sunscreens obtained in Examples 1 to 10 were tested, and the results are shown in Table 3.

[0292] Table 3

[0293]

[0294] It can be seen that the sun protection index of Examples 1 to 10 all reached SPF50+, indicating that the sunscreen of the present invention has a strong ability to protect against ultraviolet rays and has a relatively excellent sun protection effect.

[0295] Test Example 5: Security Test

[0296] According to the human skin patch test method of the 2015 edition of the "Technical Specification for Safety of Cosmetics", the sunscreens obtained in Examples 1 to 10 were patch tested on 30 people, and the test results were all negative, indicating that the sunscreen of the present invention has high safety.

[0297] In summary, the present invention specifically selects the types and combinations of solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, and supplements them with other ingredients to obtain a sunscreen that not only has a higher SPF value and stability, but also ensures that it is evenly applied and has a better sensory experience such as a refreshing and non-sticky skin feel, thereby better exerting the sunscreen effect. In addition, compared with the use of other solid sunscreens, liquid sunscreens, liquid emollients, oil-phase thickeners, and viscosity modifiers, the sunscreen of the present invention can simultaneously have a higher SPF value, better stability, and better sensory experience, and can better exert the sunscreen effect.

[0298] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A sunscreen, characterized in that: The pH value is 6 to 7, and the following components are contained in percentage by weight: solid sunscreen 4.5% to 7.4%, liquid sunscreen 14% to 21.5%, liquid emollient 1% to 9%, oil phase thickener 1.2% to 2.5%, viscosity regulator 0.17% to 0.45%, emulsifier 2.5% to 4%, film former 0.2% to 1%, nano sunscreen 0.5% to 2%, polyol 4% to 8%, and water is added to 100%; Among them, the solid sunscreen is a mixture of butyl methoxydibenzoylmethane and ethylhexyl triazone, and the mass proportions of butyl methoxydibenzoylmethane and ethylhexyl triazone in the sunscreen are 2% to 4% and 2.5% to 3.4% respectively; The liquid sunscreen is two or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, and isoamyl p-methoxycinnamate, and the mass proportions of ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, and isoamyl p-methoxycinnamate in the sunscreen are 0-9%, 0-4.5%, 0-9%, and 0-8%, respectively; The liquid emollient is one or more of dibutyl adipate, butylene glycol dicaprylate / dicaprate, cocoglyceryl esters, and neopentyl glycol diheptanoate; The oil phase thickener is a mixture of an oil phase thickener A and an oil phase thickener B, and the mass proportions of the oil phase thickener A and the oil phase thickener B in the sunscreen are 0.8% to 1.5% and 0.4% to 1% respectively; the oil phase thickener A is cetearyl alcohol or cetyl alcohol, and the oil phase thickener B is behenyl alcohol or arachidyl alcohol; The viscosity modifier is a mixture of viscosity modifier A and acrylates / C10-30 alkyl acrylate cross-linked polymer, and the mass proportions of viscosity modifier A and acrylates / C10-30 alkyl acrylate cross-linked polymer in the sunscreen are 0.02% to 0.15% and 0.15% to 0.3% respectively; the viscosity modifier A is xanthan gum or cellulose gum; The emulsifier is two or three of glyceryl stearate, PEG-100 stearate, polyglyceryl-3 methyl glucose distearate, and polyglyceryl-10 pentamethylenetetradecanoate, and the mass proportions of glyceryl stearate, PEG-100 stearate, polyglyceryl-3 methyl glucose distearate, and polyglyceryl-10 pentamethylenetetradecanoate in the sunscreen are 0-2%, 0-2%, 0-0.5%, and 0-1.5%, respectively; The film former is one or both of VP / eicosene copolymer and poly C10-30 alkyl alcohol acrylate.

2. The sunscreen according to claim 1, characterized in that The nano sunscreen is methylene bis-benzotriazolyl tetramethylbutylphenol, and the average particle size is less than 200 nm.

3. The sunscreen according to claim 1, characterized in that: The polyol is one or more of glycerol, butanediol and 1,3-propylene glycol.

4. The sunscreen according to claim 1, characterized in that: The pH value is 6-7, and it contains the following components in percentage by weight: solid sunscreen 4.5%-7.4%, liquid sunscreen 14%-21.5%, liquid emollient 1%-9%, oil phase thickener 1.2%-2.5%, viscosity regulator 0.17%-0.45%, emulsifier 2.5%-4%, film former 0.2%-1%, nano sunscreen 0.5%-2%, polyol 4%-8%, skin feel regulator 0.3%-1%, and water is added to 100%.

5. The sunscreen according to claim 4, characterized in that: The skin feel regulator is one or two of starch octenyl succinate aluminum and polymethylsiloxane.

6. The sunscreen according to claim 1, characterized in that: The pH value is 6-7, and it contains the following components in percentage by weight: solid sunscreen 4.5%-7.4%, liquid sunscreen 14%-21.5%, liquid emollient 1%-9%, oil phase thickener 1.2%-2.5%, viscosity regulator 0.17%-0.45%, emulsifier 2.5%-4%, film former 0.2%-1%, nano sunscreen 0.5%-2%, polyol 4%-8%, active ingredient 0.5%-3%, and water is added to 100%.

7. The sunscreen according to claim 6, characterized in that: The active ingredient is an oil-soluble active ingredient and / or a water-soluble active ingredient.

8. The sunscreen according to claim 7, characterized in that: The oil-soluble active substance is one or more of tocopherol acetate, bisabolol and tocopherol.

9. The sunscreen according to claim 7, characterized in that: The water-soluble active substance is one or more of allantoin, nicotinamide, ectoine, and tranexamic acid.

10. The sunscreen according to claim 1, characterized in that: The pH value is 6 to 7, and it contains the following components in percentage by weight: solid sunscreen 4.5% to 7.4%, liquid sunscreen 14% to 21.5%, liquid emollient 1% to 9%, oil phase thickener 1.2% to 2.5%, viscosity regulator 0.17% to 0.45%, emulsifier 2.5% to 4%, film former 0.2% to 1%, nano sunscreen 0.5% to 2%, polyol 4% to 8%, preservative 0.8% to 1%, flavor 0.05% to 0.3%, and water is added to 100%.

11. The sunscreen according to claim 10, characterized in that: The preservatives are two or three of phenoxyethanol, ethylhexylglycerin and p-hydroxyacetophenone.

12. The method for preparing the sunscreen according to any one of claims 1 to 3, characterized in that: The steps include: S1. Oil phase: Mix solid sunscreen, liquid sunscreen, liquid emollient, oil phase thickener, emulsifier and film former at 70-75°C; S2. Water phase: dissolve the viscosity modifier and polyol in water at 80-85°C; S3. After heating the oil phase to 80-85° C., add the water phase, homogenize, add the nano sunscreen agent and mix well, and then adjust the pH to 6-7 to obtain the sunscreen.

Images