A physical sunscreen for sensitive skin and preparation method thereof

Abstract

The present invention provides a physical sunscreen for sensitive skin and a preparation method thereof. The physical sunscreen for sensitive skin of the present invention is prepared by the following raw materials in parts by weight: 2.5 to 3.5 parts of nano zinc oxide, 1.5 to 2.5 parts of nano titanium dioxide, 1.3 to 2.1 parts of composite vegetable oils and fats, 0.3 to 0.4 parts of composite hyaluronic acid, 0.2 to 0.4 parts of composite plant extract A and 0.15 to 0.25 parts of composite plant extract B, wherein the nano zinc oxide is composed of 90 to 110 nm zinc oxide and 340 to 350 nm zinc oxide; the nano titanium dioxide is composed of 240 to 260 nm titanium dioxide, 340 to 350 nm titanium dioxide and 360 to 370 nm titanium dioxide. The sunscreen of the present invention is designed for sensitive skin, is mild and non-irritating, and has a good sun protection effect on sensitive skin, preventing sensitive skin from being sunburned.

Description

Technical Field

[0001] The invention relates to the field of sunscreen, and in particular to a physical sunscreen for sensitive skin and a preparation method thereof. Background Art

[0002] Sunbathing, also known as solarium, is to improve health by basking in the sun outdoors. However, sunburn will accelerate skin aging, so sun protection is very necessary. Sun protection includes physical sun protection and chemical sun protection. Physical sun protection is to reflect and scatter ultraviolet rays in a physical way to prevent UVA and UVB in ultraviolet rays from directly irradiating the skin.

[0003] If sensitive skin is sunburned, it often takes longer to repair, and more attention should be paid to sun protection. Many sunscreens on the market are not designed for sensitive skin, and they are prone to skin problems such as red face when used, and cannot meet the sun protection requirements of sensitive skin. Summary of the invention

[0004] In view of this, the present invention proposes a physical sunscreen for sensitive skin and a preparation method thereof to solve the above problems.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A physical sunscreen for sensitive skin, comprising the following raw materials in parts by weight: 2.5-3.5 parts of nano zinc oxide, 1.5-2.5 parts of nano titanium dioxide, 1.3-2.1 parts of composite vegetable oil, 0.3-0.4 parts of composite hyaluronic acid, 0.2-0.4 parts of composite plant extract A and 0.15-0.25 parts of composite plant extract B, wherein the nano zinc oxide is composed of 90-110nm zinc oxide and 340-350nm zinc oxide; the nano titanium dioxide is composed of 240-260nm titanium dioxide, 340-350nm titanium dioxide and 360-370nm titanium dioxide;

[0007] The composite vegetable oil is composed of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil;

[0008] The composite hyaluronic acid is composed of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate;

[0009] The composite plant extract A is composed of Houttuynia cordata extract, Portulaca oleracea extract, Centella asiatica extract,

[0010] The complex plant extract B consists of CORCHORUS OLITORIUS leaf extract, HORDEUM VULGARE extract and NYMPHAEA ALBA flower extract.

[0011] Furthermore, the nano zinc oxide is a mixture of 90-110nm zinc oxide and 340-350nm zinc oxide in a mass ratio of 1:2-4; the nano titanium dioxide is a mixture of 240-260nm titanium dioxide, 340-350nm titanium dioxide, and 360-370nm titanium dioxide in a mass ratio of 1:0.2-0.4:0.6-0.8.

[0012] Furthermore, the composite vegetable oil is composed of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEAEUROPAEA) fruit oil in a mass ratio of 8-12:4-6:1.5-2.5;

[0013] The composite hyaluronic acid is composed of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate in a mass ratio of 8-12:4-6:4-6:4-6:4-6;

[0014] The composite plant extract A is composed of Houttuynia cordata extract, Portulaca oleracea extract, Centella asiatica extract,

[0015] The composite plant extract B consists of Corchorus solito (Corchorus solitolitorius) leaf extract, Hordeum vulgaris (Hordeum vulgaris) extract and Nymphaea alba (Nymphaea salsa) flower extract in a mass ratio of 8-12:4-6:4-6.

[0016] Further, the sunscreen also contains the following raw materials: cyclopentasiloxane, 1,3-propylene glycol, butylene glycol dicaprylate / dicaprate, PEG-10 polydimethylsiloxane, glycerol, caprylic / capric triglyceride, silica, magnesium sulfate, disteardimonium hectorite, aluminum hydroxide, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer, triethoxycaprylylsilane, 1,2-hexanediol, stearic acid, polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, sorbitan caprylate, polydimethylsiloxane, glyceryl caprylate, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, ethylhexylglycerin, adenosine, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol and vitamin E. Further, it is made from the following raw materials in parts by weight:

[0017] Cyclopentasiloxane 2.5-3.5 parts, nano zinc oxide 2.5-3.5 parts,

[0018] 1.5-2.5 parts of nano titanium dioxide,

[0019] 1,3-propylene glycol 0.8-1.2 parts,

[0020] 0.8-1.2 parts of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, 0.8-1.2 parts of butylene glycol dicaprylate / dicaprate,

[0021] PEG-10 polydimethylsiloxane 0.8-1.2 parts,

[0022] Glycerin 0.8-1.2 parts,

[0023] Caprylic / capric triglyceride 0.8-1.2 parts,

[0024] Silica 0.4-0.6 parts,

[0025] 0.4-0.6 parts of magnesium sulfate,

[0026] Disteardimethylammonium hectorite 0.4-0.6 parts,

[0027] Aluminum hydroxide 0.4-0.6 parts,

[0028] Jojoba (SIMMONDSIA CHINENSIS) seed oil 0.4-0.6 parts,

[0029] Vinyl dimethicone / polymethicone silsesquioxane crosspolymer 0.15-0.25 parts, triethoxycaprylylsilane 0.15-0.25 parts,

[0030] 1,2-Hexanediol 0.15-0.25 parts,

[0031] Stearic acid 0.15-0.25 parts,

[0032] Polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane 0.15-0.25 parts,

[0033] Sorbitan octanoate 0.15-0.25 parts,

[0034] Polydimethylsiloxane 0.15-0.25 parts,

[0035] Glyceryl Caprylate 0.15-0.25 parts,

[0036] Olive oil 0.15-0.25 parts,

[0037] Dimethicone / vinyl dimethicone crosspolymer 0.15-0.25 parts,

[0038] Ethylhexylglycerin 0.08-0.12 parts,

[0039] Adenosine 0.08-0.12 parts,

[0040] Dipropylene glycol 0.08-0.12 parts,

[0041] Sodium palmitoyl proline 0.08-0.12 parts,

[0042] Butanediol 0.08-0.12 parts,

[0043] 1,2-pentanediol 0.08-0.12 parts,

[0044] Houttuynia cordata extract 0.08-0.12 parts,

[0045] 0.08-0.12 parts of purslane (PORTULACA OLERACEA) extract,

[0046] 0.08-0.12 parts of Corchorus olitorii leaf extract,

[0047] Centella Asiatica extract 0.08-0.12 parts,

[0048] Vitamin E 0.08-0.12 parts,

[0049] Sodium hyaluronate 0.08-0.12 parts,

[0050] Barley (HORDEUM VULGARE) extract 0.04-0.06 parts,

[0051] Sodium hyaluronate cross-linked polymer 0.04-0.06 parts,

[0052] Hydrolyzed hyaluronic acid 0.04-0.06 parts,

[0053] 0.04-0.06 parts of white water lily (NYMPHAEA ALBA) flower extract,

[0054] 0.04-0.06 parts of hyaluronic acid,

[0055] 0.04-0.06 parts of hydrolyzed sodium hyaluronate.

[0056] Further, the raw materials comprising the following weight percentages are prepared:

[0057] Cyclopentasiloxane 2.5-3.5%,

[0058] Nano zinc oxide 2.5-3.5%,

[0059] Nano titanium dioxide 1.5-2.5%,

[0060] 1,3-Propanediol 0.8-1.2%,

[0061] Phytosterol / Isostearyl Alcohol / Cetyl Alcohol / Stearyl Alcohol / Behenyl Alcohol Dimer Linoleate 0.8-1.2%,

[0062] Butylene glycol dicaprylate / dicaprate 0.8-1.2%,

[0063] PEG-10 dimethicone 0.8-1.2%,

[0064] Glycerol 0.8-1.2%,

[0065] Caprylic / capric triglyceride 0.8-1.2%, silica 0.4-0.6%,

[0066] Magnesium sulfate 0.4-0.6%,

[0067] Disteardimethylammonium hectorite 0.4-0.6%,

[0068] Aluminum hydroxide 0.4-0.6%,

[0069] Jojoba (SIMMONDSIA CHINENSIS) seed oil 0.4-0.6%,

[0070] Vinyl Dimethicone / Methicone Silsesquioxane Crosspolymer 0.15-0.25%, Triethoxycaprylylsilane 0.15-0.25%,

[0071] 1,2-Hexanediol 0.15-0.25%,

[0072] Stearic acid 0.15-0.25%,

[0073] Polyglyceryl-3 polydimethylsiloxyethyl dimethicone 0.15-0.25%,

[0074] Sorbitan octanoate 0.15-0.25%,

[0075] Dimethicone 0.15-0.25%, Glyceryl Caprylate 0.15-0.25%,

[0076] Olive (OLEAEUROPAEA) fruit oil 0.15-0.25%,

[0077] Dimethicone / Vinyl Dimethicone Crosspolymer 0.15-0.25%, Ethylhexylglycerin 0.08-0.12%,

[0078] Adenosine 0.08-0.12%,

[0079] Dipropylene glycol 0.08-0.12%,

[0080] Sodium palmitoyl proline 0.08-0.12%, butylene glycol 0.08-0.12%,

[0081] 1,2-Pentanediol 0.08-0.12%,

[0082] Houttuynia cordata extract 0.08-0.12%,

[0083] Portulaca oleracea extract 0.08-0.12%,

[0084] CORCHORUS OLITORIUS leaf extract 0.08-0.12%,

[0085] Centella asiatica extract 0.08-0.12%,

[0086] Vitamin E 0.08-0.12%,

[0087] Sodium hyaluronate 0.08-0.12%,

[0088] Barley (HORDEUM VULGARE) extract 0.04-0.06%,

[0089] Sodium hyaluronate cross-linked polymer 0.04-0.06%,

[0090] Hydrolyzed hyaluronic acid 0.04-0.06%,

[0091] NYMPHAEA ALBA flower extract 0.04-0.06%,

[0092] Hyaluronic acid 0.04-0.06%,

[0093] Hydrolyzed sodium hyaluronate 0.04-0.06%,

[0094] Remaining amount of water.

[0095] The preparation method of the physical sunscreen for sensitive skin of the present invention comprises the following steps: (1) premixing sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate, and then adding 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol and vitamin E to prepare phase A; (2) mixing phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS seed oil and olive (OLEAEUROPAEA) fruit oil were premixed, and then cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 polydimethicone, caprylic / capric triglyceride, vinyl polydimethicone / polymethicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethicone, sorbitan caprylate, polydimethicone, glyceryl caprylate, polydimethicone / vinyl polydimethicone crosspolymer, ethylhexylglycerin, and adenosine were added to prepare phase B; (3) nano zinc oxide and nano titanium dioxide were added to the main pot, phase A was pumped into the main pot, phase B was added to the main pot, and then Houttuynia cordata extract, Portulaca oleracea extract, Centella asiatica extract were added. (4) after homogenization, adding Corchorus Olitorius leaf extract, Hordeum Vulgaris extract and Nymphaea alba flower extract to prepare a physical sunscreen.

[0096] Furthermore, the specific steps for preparing phase A are: taking purified water and adding it to pot A, adding sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and stirring for 8 to 12 minutes at a stirring speed of 200 to 300 r / min and a temperature of 45 to 55°C; after heating to 65 to 75°C, 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E are added to pot A, and stirred for 20 to 30 minutes at a speed of 350 to 450 r / min and a temperature of 65 to 75°C to obtain phase A.

[0097] Furthermore, the specific steps of preparing the phase B are as follows: phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, olive (OLEA EUROPAEA) fruit oil is added to pot B, and stirred for 10 to 20 minutes at a stirring speed of 80 to 120 r / min and a temperature of 40 to 50°C; then cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 polydimethylsiloxane, caprylic / capric triglyceride, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, sorbitan caprylate, polydimethylsiloxane, glyceryl caprylate, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, ethylhexylglycerin and adenosine are added to pot B, and stirred at a speed of 100 to 200 r / min and a temperature of 75 to 80°C for 25 to 35 minutes to obtain phase B.

[0098] The preparation method of the physical sunscreen for sensitive skin of the present invention comprises the following steps:

[0099] (1) Add purified water to pot A, add sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and stir for 8 to 12 minutes at a stirring speed of 200 to 300 r / min and a temperature of 45 to 55° C.; after heating to 65 to 75° C., add 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E to pot A, and stir for 20 to 30 minutes at a speed of 350 to 450 r / min and a temperature of 65 to 75° C. to obtain phase A;

[0100] (2) Phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, olive (OLEA EUROPAEA) fruit oil is added to pot B, and stirred for 10 to 20 minutes at a stirring speed of 80 to 120 r / min and a temperature of 40 to 50°C; then cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 polydimethicone, caprylic / capric triglyceride, vinyl polydimethicone / polymethicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethicone, sorbitan caprylate, polydimethicone, glyceryl caprylate, polydimethicone / vinyl polydimethicone crosspolymer, ethylhexylglycerin, and adenosine are added to pot B, and stirred at a speed of 100 to 200 r / min and a temperature of 75 to 80°C for 25 to 35 minutes to obtain phase B;

[0101] (3) Add nano zinc oxide and nano titanium dioxide to the main pot, pump phase A into the main pot, control the temperature to 60-70°C, stir at 60-80 r / min, add phase B to the main pot, stir at 50-60 r / min for 30-40 min, control the temperature to 55-60°C, add Houttuynia cordata extract, Portulaca oleracea extract, and Centella asiatica extract, keep stirring at 50-60 r / min for 5-10 min, evacuate to -0.04--0.02 MPa, and homogenize at 2000-3000 r / min for 30-40 min;

[0102] (4) After homogenization, when the temperature drops to below 50°C, add Corchorus olitorius leaf extract, Hordeum vulgaris extract and Nymphaea alba flower extract, and stir at 35-45 r / min for 15-30 min until the temperature drops to 35-45°C.

[0103] Compared with the prior art, the present invention has the following beneficial effects:

[0104] (1) The sunscreen of the present invention is designed for sensitive skin, is mild and non-irritating, and has a good sun protection effect on sensitive skin, preventing sensitive skin from being sunburned.

[0105] (2) The present invention adopts different nano zinc oxide and titanium dioxide combinations, which have better ultraviolet shielding performance, better reflect and scatter ultraviolet rays, minimize the exposure of UVA and UVB in ultraviolet rays to the skin, significantly reduce the degree of sunburn on the skin, and greatly improve the sun protection effect.

[0106] (3) The present invention adds a certain amount of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil to form a protective film on the skin, provide moisture to the skin, and repair the skin barrier.

[0107] (4) The present invention adds a certain amount of sodium hyaluronate cross-linked polymer, sodium hyaluronate, hyaluronic acid, hydrolyzed hyaluronic acid, and hydrolyzed sodium hyaluronate to form a hyaluronic acid film on the epidermis, protect the permeability barrier, and reduce water loss; penetrate into the basal layer and dermis of the skin, replenish moisture, have a better moisturizing effect, and deeply repair the skin barrier.

[0108] (5) The present invention adds a certain amount of Corchorus Olitorius leaf extract, Hordeum Vulgaris extract and Nymphaea Alba flower extract to synergistically relieve sunburn irritation, soothe the skin, and has good moisturizing, anti-oxidation and skin lightening effects.

[0109] (6) The present invention adds a certain amount of Houttuynia cordata extract, Portulaca oleracea extract, and Centella asiatica extract, which helps to calm the skin, relieve sunburn discomfort, and also has a good antibacterial effect. DETAILED DESCRIPTION

[0110] In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

[0111] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0112] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial sources.

[0113] Examples 1-3

[0114] Table 1 Formula of sunscreen cream of embodiment 1-3

[0115]

[0116]

[0117] In the above-mentioned examples 1-3, the nano zinc oxide is mixed with 90-110nm zinc oxide and 340-350nm zinc oxide in a mass ratio of 1:3; the nano titanium dioxide is mixed with 240-260nm titanium dioxide, 340-350nm titanium dioxide, and 360-370nm titanium dioxide in a mass ratio of 1:0.3:0.7.

[0118] The preparation method of the physical sunscreen of the above-mentioned embodiments 1-3 comprises the following steps:

[0119] (1) Add purified water to pot A, add sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and stir for 8 to 12 minutes at a stirring speed of 200 to 300 r / min and a temperature of 45 to 55° C.; after heating to 65 to 75° C., add 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E to pot A, and stir for 20 to 30 minutes at a speed of 350 to 450 r / min and a temperature of 65 to 75° C. to obtain phase A;

[0120] (2) Phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, olive (OLEA EUROPAEA) fruit oil is added to pot B, and stirred for 10 to 20 minutes at a stirring speed of 80 to 120 r / min and a temperature of 40 to 50°C; then cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 polydimethicone, caprylic / capric triglyceride, vinyl polydimethicone / polymethicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethicone, sorbitan caprylate, polydimethicone, glyceryl caprylate, polydimethicone / vinyl polydimethicone crosspolymer, ethylhexylglycerin, and adenosine are added to pot B, and stirred at a speed of 100 to 200 r / min and a temperature of 75 to 80°C for 25 to 35 minutes to obtain phase B;

[0121] (3) Add nano zinc oxide and nano titanium dioxide to the main pot, pump phase A into the main pot, control the temperature to 60-70°C, stir at 60-80 r / min, add phase B to the main pot, stir at 50-60 r / min for 30-40 min, control the temperature to 55-60°C, add Houttuynia cordata extract, Portulaca oleracea extract, and Centella asiatica extract, keep stirring at 50-60 r / min for 5-10 min, evacuate to -0.04--0.02 MPa, and homogenize at 2000-3000 r / min for 30-40 min;

[0122] (4) After homogenization, when the temperature drops to below 50°C, add Corchorus olitorius leaf extract, Hordeum vulgaris extract and Nymphaea alba flower extract, and stir at 35-45 r / min for 15-30 min until the temperature drops to 35-45°C.

[0123] Example 4

[0124] The preparation method of the physical sunscreen is mainly different from that of Example 1 in that the nano zinc oxide in the formula is a mixture of 90-110 nm zinc oxide and 340-350 nm zinc oxide in a mass ratio of 1:2; the nano titanium dioxide is a mixture of 240-260 nm titanium dioxide, 340-350 nm titanium dioxide, and 360-370 nm titanium dioxide in a mass ratio of 1:0.2:0.8. Other raw materials and preparation methods are consistent with those of Example 1.

[0125] Example 5

[0126] The preparation method of the physical sunscreen is mainly different from that of Example 1 in that the nano zinc oxide in the formula is composed of 90-110nm zinc oxide and 340-350nm zinc oxide in a mass ratio of 1:4; the nano titanium dioxide is composed of 240-260nm titanium dioxide, 340-350nm titanium dioxide, and 360-370nm titanium dioxide in a mass ratio of 1:0.4:0.6. Other raw materials and preparation methods are consistent with those of Example 1.

[0127] Comparative Example 1

[0128] The preparation method of the physical sunscreen is mainly different from that of Example 1 in that the added amounts of the composite vegetable oil, composite hyaluronic acid, composite plant extract A and composite plant extract B are different from those of Example 1: 3.0% of nano zinc oxide, 2.0% of nano titanium dioxide, 1.0% of composite vegetable oil, 1.0% of composite hyaluronic acid, 0.1% of composite plant extract A and 0.1% of composite plant extract B.

[0129] Among them, the mass ratio of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer oleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil is 10:5:2; the mass ratio of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate is 2:1:1:1:1; the mass ratio of CORCHORUS OLITORIUS leaf extract, barley (HORDEUM VULGARE) extract and white water lily (NYMPHAEA ALBA) flower extract is 2:1:1.

[0130] Comparative Example 2

[0131] The preparation method of the physical sunscreen is mainly different from that of Example 1 in that the mass ratio of (compound vegetable oil) phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil in the formula is 1:1:1, and the total amount of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil is the same as that in Example 1;

[0132] The mass ratio of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate in the formula (composite hyaluronic acid) is 1:1:1:1:1, and the total amount of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate is the same as that in Example 1;

[0133] The mass ratio of CORCHORUS OLITORIUS leaf extract, HORDEUM VULGARE extract and NYMPHAEA ALBA flower extract in the formula (composite plant extract B) is 1:1:1, and the total amount of CORCHORUS OLITORIUS leaf extract, HORDEUM VULGARE extract and NYMPHAEA ALBA flower extract is the same as that in Example 1. Composite plant oil. Other ingredients are the same as those in Example 1.

[0134] Comparative Example 3

[0135] The preparation method of the physical sunscreen is mainly different from that of Example 1 in that the nano zinc oxide in the formula only uses 240-260 nm zinc oxide and the nano titanium dioxide only uses 290-310 nm titanium dioxide. Other raw materials and preparation methods are the same as those of Example 1.

[0136] 1. Biosafety Test

[0137] The physical sunscreens prepared in Examples 1-5 and Comparative Examples 1-3 were subjected to in vitro cytotoxicity test, skin sensitization test and skin irritation test respectively. The results showed that the physical sunscreens were non-cytotoxic, non-sensitizing and non-irritating to the skin.

[0138] 2 Efficacy test

[0139] The physical sunscreens prepared from the above Examples 1-5 and Comparative Examples 1-3 were tested, and the results were as follows:

[0140] Female volunteers with sensitive skin aged 20 to 30 years old were recruited. All volunteers were diagnosed as sensitive skin by the sensitive skin diagnosis and evaluation criteria. They were randomly divided into experimental groups 1 to 8 and a control group, with 10 people in each group.

[0141] The test groups 1-8 correspond to the sunscreens of Examples 1-5 and Comparative Examples 1-3, respectively. The control group: apply a commercially available sunscreen (Lucafia sunscreen). Usage: Apply sunscreen evenly on the face 30 minutes before sun exposure, without other protective conditions, and sun exposure for 3 hours from 9 to 12 o'clock every day for 3 consecutive days. The skin erythema index is tested the next day after the sun exposure, and compared with the control group, and the percentage change of the skin erythema index after sun exposure is calculated.

[0142] Improvement of skin erythema index after sun exposure (%) = [(skin erythema index of the control group after sun exposure - skin erythema index of the control group before sun exposure) - (skin erythema index of the experimental group after sun exposure - skin erythema index of the experimental group before sun exposure)] / (skin erythema index of the control group after sun exposure - skin erythema index of the control group before sun exposure) * 100%.

[0143] The results are shown in Table 2.

[0144] Table 2 After sun exposure

[0145] Improvement of skin erythema index Example 1 69.0％ Example 2 64.1％ Example 3 65.2％ Example 4 67.7％ Example 5 65.1％ Comparative Example 1 51.6％ Comparative Example 2 48.4％ Comparative Example 3 44.9％

[0146] The above results show that the increase in skin erythema index after sun exposure is significantly reduced by applying the sunscreens of Examples 1-5 and Comparative Examples 1-3. Compared with the control group, applying the sunscreens of Examples 1-5 and Comparative Examples 1-3 can effectively reduce sunburn on sensitive skin and play an effective role in sun protection for sensitive skin. Among them, the sunscreens of Examples 1-5 are particularly effective.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A physical sunscreen for sensitive skin, characterized in that: The invention is prepared by the following raw materials in parts by weight: 2.5-3.5 parts of nano zinc oxide, 1.5-2.5 parts of nano titanium dioxide, 1.3-2.1 parts of composite vegetable oil, 0.3-0.4 parts of composite hyaluronic acid, 0.2-0.4 parts of composite plant extract A and 0.15-0.25 parts of composite plant extract B; the composite plant extract A is composed of Houttuynia cordata extract, Portulaca oleracea extract and Centella asiatica extract; The nano zinc oxide is composed of 90-110nm zinc oxide and 340-350nm zinc oxide in a mass ratio of 1:2-4; the nano titanium dioxide is composed of 240-260nm titanium dioxide, 340-350nm titanium dioxide, and 360-370nm titanium dioxide in a mass ratio of 1:0.2-0.4:0.6-0.8; The composite vegetable oil is composed of phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba seed oil, and olive (OLEA EUROPAEA) fruit oil in a mass ratio of 8-12:4-6:1.5-2.5; The composite hyaluronic acid is composed of sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid and hydrolyzed sodium hyaluronate in a mass ratio of 8-12:4-6:4-6:4-6:4-6; The composite plant extract B consists of a Corchorus olitorius leaf extract, a Hordeum vulgaris extract and a Nymphaea alba flower extract in a mass ratio of 8-12:4-6:4-6.

2. The physical sunscreen for sensitive skin according to claim 1, characterized in that: The composite plant extract A consists of houttuynia cordata extract, purslane (PORTULACA OLERACEA) extract and Centella asiatica extract in a mass ratio of 8-12:8-12:8-12.

3. The physical sunscreen for sensitive skin according to claim 1, characterized in that: The sunscreen also contains the following ingredients: cyclopentasiloxane, 1,3-propylene glycol, butylene glycol dicaprylate / dicaprate, PEG-10 dimethicone, glycerin, caprylic / capric triglyceride, silica, magnesium sulfate, disteardimonium hectorite, aluminum hydroxide, vinyl dimethicone / methicone silsesquioxane crosspolymer, triethoxycaprylylsilane, 1,2-hexanediol, stearic acid, polyglyceryl-3 polydimethylsilyl hydroxyethyl dimethicone, sorbitan caprylate, dimethicone, glyceryl caprylate, dimethicone / vinyl dimethicone crosspolymer, ethylhexylglycerin, adenosine, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol and vitamin E.

4. The physical sunscreen for sensitive skin according to claim 3, characterized in that: The method comprises the following raw materials in parts by weight: 2.5-3.5 parts of cyclopentasiloxane, 2.5-3.5 parts of nano zinc oxide, 1.5-2.5 parts of nano titanium dioxide, 1, 3-propylene glycol 0.8-1.2 parts, Phytosterol / Isostearyl Alcohol / Cetyl Alcohol / Stearyl Alcohol / Behenyl Alcohol Dimer Linoleate 0.8-1.2 parts, Butanediol dicaprylate / dicaprate 0.8-1.2 parts, PEG-10 polydimethylsiloxane 0.8-1.2 parts, Glycerin 0.8-1.2 parts, Caprylic / capric triglyceride 0.8-1.2 parts, Silica 0.4-0.6 parts, 0.4-0.6 parts of magnesium sulfate, Disteardimethylammonium hectorite 0.4-0.6 parts, Aluminum hydroxide 0.4-0.6 parts, Jojoba seed oil 0.4-0.6 parts, Vinyl dimethicone / methicone silsesquioxane crosspolymer 0.15-0.25 parts, Triethoxycaprylylsilane 0.15-0.25 parts, 1,2-Hexanediol 0.15-0.25 parts, Stearic acid 0.15-0.25 parts, Polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane 0.15-0.25 parts, Sorbitan octanoate 0.15-0.25 parts, Polydimethylsiloxane 0.15-0.25 parts, Glyceryl Caprylate 0.15-0.25 parts, Olive (OLEA EUROPAEA) fruit oil 0.15-0.25 parts, Dimethicone / vinyl dimethicone crosspolymer 0.15-0.25 parts, Ethylhexylglycerin 0.08-0.12 parts, Adenosine 0.08-0.12 parts, Dipropylene glycol 0.08-0.12 parts, Sodium palmitoyl proline 0.08-0.12 parts, Butanediol 0.08-0.12 parts, 1, 2-pentanediol 0.08-0.12 parts, Houttuynia cordata extract 0.08-0.12 parts, 0.08-0.12 parts of purslane (PORTULACA OLERACEA) extract, 0.08-0.12 parts of Corchorus olitorii leaf extract, Centella asiatica extract 0.08-0.12 parts, Vitamin E 0.08-0.12 parts, Sodium hyaluronate 0.08-0.12 parts, Barley (HORDEUM VULGARE) extract 0.04-0.06 parts, Sodium hyaluronate cross-linked polymer 0.04-0.06 parts, Hydrolyzed hyaluronic acid 0.04-0.06 parts, NYMPHAEA ALBA flower extract 0.04-0.06 parts, 0.04-0.06 parts of hyaluronic acid, 0.04-0.06 parts of hydrolyzed sodium hyaluronate.

5. The physical sunscreen for sensitive skin according to claim 3, characterized in that: The invention is prepared by comprising the following raw materials in percentage by weight: Cyclopentasiloxane 2.5-3.5%, Nano zinc oxide 2.5-3.5%, Nano titanium dioxide 1.5-2.5%, 1, 3-propylene glycol 0.8-1.2%, Phytosterol / Isostearyl Alcohol / Cetyl Alcohol / Stearyl Alcohol / Behenyl Alcohol Dimer Linoleate 0.8-1.2%, Butylene glycol dicaprylate / dicaprate 0.8-1.2%, PEG-10 polydimethylsiloxane 0.8-1.2%, Glycerol 0.8-1.2%, Caprylic / capric triglyceride 0.8-1.2%, Silica 0.4-0.6%, Magnesium sulfate 0.4-0.6%, Disteardimethylammonium hectorite 0.4-0.6%, Aluminum hydroxide 0.4-0.6%, Jojoba seed oil 0.4-0.6%, Vinyl Dimethicone / Methicone Silsesquioxane Crosspolymer 0.15-0.25%, Triethoxycaprylylsilane 0.15-0.25%, 1,2-Hexanediol 0.15-0.25%, Stearic acid 0.15-0.25%, Polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane 0.15-0.25%, Sorbitan octanoate 0.15-0.25%, Polydimethylsiloxane 0.15-0.25%, Glyceryl Caprylate 0.15-0.25%, Olive (OLEA EUROPAEA) fruit oil 0.15-0.25%, Dimethicone / vinyl dimethicone crosspolymer 0.15-0.25%, Ethylhexylglycerin 0.08-0.12%, Adenosine 0.08-0.12%, Dipropylene glycol 0.08-0.12%, Sodium palmitoyl proline 0.08-0.12%, Butanediol 0.08-0.12%, 1, 2-pentanediol 0.08-0.12%, Houttuynia cordata extract 0.08-0.12%, Portulaca oleracea extract 0.08-0.12%, Corchorus olitorii leaf extract 0.08-0.12%, Centella asiatica extract 0.08-0.12%, Vitamin E 0.08-0.12%, Sodium hyaluronate 0.08-0.12%, Barley (HORDEUM VULGARE) extract 0.04-0.06%, Sodium hyaluronate cross-linked polymer 0.04-0.06%, Hydrolyzed hyaluronic acid 0.04-0.06%, NYMPHAEA ALBA flower extract 0.04-0.06%, Hyaluronic acid 0.04-0.06%, Hydrolyzed sodium hyaluronate 0.04-0.06%, Remaining amount of water.

6. The method for preparing the physical sunscreen for sensitive skin according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: (1) premixing sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and then adding 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E to prepare phase A; (2) premixing phytosteryl / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba seed oil, and olive oil, and then adding cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 Dimethicone, caprylic / capric triglyceride, vinyl dimethicone / methicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl dimethicone, sorbitan caprylate, dimethicone, glyceryl caprylate, dimethicone / vinyl dimethicone crosspolymer, ethylhexylglycerin, adenosine, to prepare phase B; (3) Add nano zinc oxide and nano titanium dioxide to the main pot, pump phase A into the main pot, add phase B to the main pot, then add Houttuynia cordata extract, purslane extract, and Centella asiatica extract, and vacuum homogenize; (4) After homogenization, add CORCHORUS chinensis extract OLITORIUS leaf extract, HORDEUMVULGARE barley extract and NYMPHAEA ALBA flower extract are used to make a physical sunscreen.

7. The method for preparing a physical sunscreen for sensitive skin according to claim 6, characterized in that: The specific steps of preparing phase A are as follows: adding purified water to pot A, adding sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and stirring for 8 to 12 minutes at a stirring speed of 200 to 300 r / min and a temperature of 45 to 55° C.; after heating to 65 to 75° C., 1,3-propylene glycol, glycerol, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E are added to pot A, and stirring for 20 to 30 minutes at a speed of 350 to 450 r / min and a temperature of 65 to 75° C. is performed to obtain phase A.

8. The method for preparing a physical sunscreen for sensitive skin according to claim 6, characterized in that: The specific steps of preparing phase B are as follows: adding phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil to pot B, stirring for 10 to 20 minutes at a stirring speed of 80 to 120 r / min and a temperature of 40 to 50° C.; then adding cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 Add dimethicone, caprylic / capric triglyceride, vinyl dimethicone / methicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl dimethicone, sorbitan caprylate, dimethicone, glyceryl caprylate, dimethicone / vinyl dimethicone crosspolymer, ethylhexylglycerin and adenosine to pot B and stir at a speed of 100-200 r / min and a temperature of 75-80°C for 25-35 min to obtain phase B.

9. The method for preparing a physical sunscreen for sensitive skin according to claim 6, characterized in that: The following steps are involved: (1) Add purified water to pot A, add sodium hyaluronate, sodium hyaluronate cross-linked polymer, hydrolyzed hyaluronic acid, hyaluronic acid, and hydrolyzed sodium hyaluronate, and stir at a stirring speed of 200-300 r / min and a temperature of 45-55°C for 8-12 minutes; after heating to 65-75°C, add 1,3-propylene glycol, glycerin, silica, magnesium sulfate, disteardimethylammonium hectorite, aluminum hydroxide, 1,2-hexanediol, stearic acid, dipropylene glycol, sodium palmitoyl proline, butylene glycol, 1,2-pentanediol, and vitamin E to pot A, and stir at a speed of 350-450 r / min and a temperature of 65-75°C for 20-30 minutes to obtain phase A; (2) Add phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol dimer linoleate, jojoba (SIMMONDSIA CHINENSIS) seed oil, and olive (OLEA EUROPAEA) fruit oil to pot B and stir for 10-20 minutes at a stirring speed of 80-120 r / min and a temperature of 40-50°C. Then add cyclopentasiloxane, butylene glycol dicaprylate / dicaprate, PEG-10 Add dimethicone, caprylic / capric triglyceride, vinyl dimethicone / methicone silsesquioxane crosspolymer, triethoxycaprylylsilane, polyglyceryl-3 polydimethylsilyl hydroxyethyl dimethicone, sorbitan caprylate, dimethicone, glyceryl caprylate, dimethicone / vinyl dimethicone crosspolymer, ethylhexylglycerin and adenosine to pot B, stir at a speed of 100-200 r / min and a temperature of 75-80°C for 25-35 min to obtain phase B; (3) Add nano zinc oxide and nano titanium dioxide to the main pot, pump phase A into the main pot, control the temperature to 60-70°C, stir at 60-80 r / min, add phase B to the main pot, stir at 50-60 r / min for 30-40 min, control the temperature to 55-60°C, add Houttuynia cordata extract, Portulaca oleracea extract, and Centella asiatica extract, keep stirring at 50-60 r / min for 5-10 min, evacuate to -0.04--0.02 MPa, and homogenize at 2000-3000 r / min for 30-40 min; (4) After homogenization, when the temperature drops to below 50°C, add Corchorus Olitorius leaf extract, Hordeum Vulgaris extract and Nymphaea Alba flower extract, and stir at 35-45 r / min for 15-30 min until the temperature drops to 35-45°C.

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