CN-119908991-B - Sun-screening composition and preparation method and application thereof

Abstract

The invention relates to the technical field of cosmetic preparation, in particular to a sun-proof composition and a preparation method thereof. The sun-proof composition has moderate paste hardness, is not easy to break, does not produce oil at high temperature, and is convenient to carry and use. Through the synergistic effect of the components such as the microsphere particles, the free sun-screening agent, the sun-screening enhancer and the like, the composition has higher SPF value and PFA value, realizes full-band protection of UVA, UVB, HEV and IRA, improves the skin barrier function, enhances the water-locking and moisturizing capability, reduces the skin damage caused by ultraviolet rays and prevents photoaging.

Inventors

• FANG BINGTING
• XIE ZONGHUI
• Fang Bingsheng
• Fang Bingcheng

Assignees

• 广州芬臣生物科技有限公司

Dates

Publication Date

20260508

Application Date

20250211

Claims (7)

1. 1. A sunscreen composition characterized in that, the composition comprises the following components in percentage by weight: Phase A comprises 35-40% of grease, 16-20% of emollient, and 2-6% of microsphere particles; phase B, 14-18% of wax and 1-2% of preservative; 4% -8% of free sun-screening agent and 6% -8% of vitamin E; 3-5% of skin conditioner, 2-3% of sun-screening enhancer and 1-2% of essence, wherein the microsphere particles are microsphere particles loaded with ethylhexyl methoxycinnamate; the sun-proof enhancer is one or more of marigold extract, calendula extract, collard extract and blueberry extract; The preparation method of the microsphere particles comprises the following steps: Adding polylactic acid into ethyl acetate, stirring at room temperature to uniformly disperse the polylactic acid, slowly adding ethylhexyl methoxycinnamate into the polymer solution, stirring to uniformly disperse the mixture to obtain an oil phase, dissolving a proper amount of sodium dodecyl sulfate into deionized water, stirring to uniformly disperse the mixture to obtain a water phase, slowly dripping the oil phase into the water phase, emulsifying the oil phase under high-speed stirring to form an emulsion, removing an organic solvent through rotary evaporation to obtain microsphere suspension, centrifuging the microsphere suspension, washing the microsphere suspension with deionized water, and carrying out vacuum drying to obtain the microsphere particles loaded with ethylhexyl methoxycinnamate.
2. 2. The composition of claim 1, wherein the oil is one or more of olive oil, jojoba oil, and white pool seed oil, the emollient is one or more of glycerin, propylene glycol, the wax is one or more of beeswax, carnauba wax, and candelilla wax, the preservative is one or more of phenoxyethanol, and methylparaben, and the skin conditioner is bisabolol.
3. 3. The composition according to claim 1, wherein the free sunscreen is selected from an organic sunscreen and/or an inorganic sunscreen, wherein the organic sunscreen is octocrylene and the inorganic sunscreen is one or more of nano titanium dioxide, nano zinc oxide.
4. 4. A sunscreen composition according to claim 3, wherein the weight ratio of organic sunscreen agent to inorganic sunscreen agent in said free sunscreen agent is from 1:0.5 to 2.
5. 5. A method of preparing a sunscreen composition according to any one of claims 1 to 4 comprising the steps of adding phase a material to an emulsifying kettle, heating to 40 to 50 ℃, homogenizing at 500 to 1000 rpm for 5 to 10 minutes to mix uniformly, adding phase B material, stirring for 15 to 20 minutes to dissolve completely, cooling to 30 to 40 ℃, adding phase C material, stirring for 10 to 15 minutes, cooling to 30 ℃ or less, adding phase D material, stirring for 5 to 10 minutes, cooling to room temperature, checking for no abnormality, and discharging and filling.
6. 6. Use of a sunscreen composition according to any of claims 1 to 4 for the preparation of a cosmetic.
7. 7. The use according to claim 6, characterized in that the cosmetic is a stick cosmetic.

Description

Sun-screening composition and preparation method and application thereof Technical Field The invention relates to the technical field of cosmetic preparation, in particular to a sun-proof composition and a preparation method thereof. Background With the increasing attention of people to skin health, sun protection has become an important link in daily skin care. Prolonged exposure to UVA and UVB in the uv can cause serious damage to the skin, such as leading to sunburn, tanning, accelerated aging, and even increased risk of skin cancer. In recent years, with intensive research, HEV (blue light) and IRA (near infrared light) have been found to have adverse effects on the skin, such as causing skin pigmentation, destroying skin cell structures, and the like. There are a number of sunscreen products on the market today, for example CN102302417a discloses a sunscreen emulsion which achieves protection against UVA and UVB mainly by adding specific organic and inorganic sunscreens. However, the product has obvious defects in the aspect of HEV and IRA protection, and cannot meet the requirements of modern consumers on full-band protection. In addition, CN110251406a discloses a sunscreen spray, which has a certain advantage in terms of convenience of use, but easily causes problems of nozzle blockage and uneven spray under high temperature environment, and has poor effect of improving skin barrier function. In addition, many sun protection products have problems in dosage forms such as inconvenient carrying or limited carrying by public transportation. For example, traditional bottled sunscreens are bulky and inconvenient to carry during travel or outdoor activities, while some sunscreen sprays may be limited when riding in public transportation such as aircraft due to their pressure tank design. Meanwhile, the existing sun protection products are still to be improved in terms of skin feel, and partial products have greasy feel, heavy feel or cause skin discomfort after being smeared, so that the use experience of consumers is affected. In summary, it is important to develop a sunscreen product that can realize full-band protection, has good skin feel, is convenient to carry, and can promote skin barrier function. Disclosure of Invention The invention aims to provide a sun-screening composition which is convenient to carry and use, can realize the full-band effective protection of UVA, UVB, HEV and IRA, and solves the technical problems of poor oily and thick skin feel, unobvious effect on improving the skin barrier function and the like of the existing sun-screening product. In order to achieve the above purpose, the present invention adopts the following technical scheme: The sun-screening composition comprises, by weight, 20% -40% of grease, 5% -20% of wax, 5% -20% of an emollient, 1% -3% of a preservative, 4% -10% of vitamin E, 3% -8% of a skin conditioner, 5% -15% of a sun-screening agent, 1% -4% of a sun-screening enhancer and 0.5% -2% of essence, wherein the sun-screening agent comprises microsphere particles and free sun-screening agents, and the microsphere particles are loaded with sun-screening ingredients. Preferably, the grease is one or more of olive oil, jojoba oil and white pool flower seed oil, and the emollient is one or more of glycerol and propylene glycol. The skin conditioner comprises a skin conditioning agent, a preservative, a wax, a preservative, a skin conditioning agent and a skin conditioning agent, wherein the wax is one or more of beeswax, carnauba wax and candelilla wax, the preservative is one or more of phenoxyethanol and methylparaben, and the skin conditioning agent is bisabolol. Further, the free sunscreen is selected from organic sunscreens and/or inorganic sunscreens. Wherein the organic sun-screening agent is one or more of ethylhexyl methoxycinnamate and octocrylene, and the inorganic sun-screening agent is one or more of nano titanium dioxide and nano zinc oxide. To further enhance the sunscreen properties of the composition, the weight ratio of organic sunscreen agent to inorganic sunscreen agent in the free sunscreen agent is preferably 1:0.5-2. Further, the sun protection enhancer is one or more of marigold extract, calendula extract, collard extract and blueberry extract. The sunscreen enhancer of the invention contains a specific chemical structure and is capable of absorbing the energy of HEV and IRA. For example carotenoids having conjugated double bond systems, which have absorption peaks in the blue and near infrared regions, and whose conjugated double bonds in the molecule can absorb photon energy by electron transition, converting the light energy into other forms of energy such as thermal energy, thereby reducing the harmful light dose to the skin. The sun-screening composition comprises, by weight, 35% -40% of grease, 14% -18% of wax, 16% -20% of an emollient, 1% -2% of a preservative, 6% -8% of vitamin E, 3% -5% of a skin conditioner, 9% -13% of a sun-screeni