Sunscreen cosmetic composition with high safeness and preparation method thereof

Abstract

The invention discloses a sunscreen cosmetic composition with high safeness and a preparation method thereof. The structure of the sunscreen cosmetic composition is an oil in water in oil structure, wherein inner phase oil comprises 12.0-30.0% of UV absorbant, 2.5-10% of grease and 0.1-2% of emulsifier 1; external phase oil comprises 10-55% of grease, 0.1-5.0% of oil soluble anti-allergy and anti-oxidation additive and 1.0-5.0% of emulsifier 2; intermediate water phase comprises 1.0-20.0% of humectant, 0.5-8% of emulsifier 3 and balance of water; the hydrophile-lipophile balance number of the emulsifier 1 is below 5, the hydrophile-lipophile balance number of the emulsifier 2 is 3-8, and the hydrophile-lipophile balance number of the emulsifier 3 is 10-15; and the weight ratio of the sum of the emulsifier 1 and emulsifier 3 to the emulsifier 2 is greater than 1.5. The sunscreen cosmetic composition prepared by the invention can effectively reduce irritation and has a higher sunscreen effect.

Description

technical field [0001] The invention belongs to the field of daily chemicals, and in particular relates to a highly safe sunscreen cosmetic composition and a preparation method. Background technique [0002] With increasing global pollution and the depletion of the ozone layer, the amount of ultraviolet rays in sunlight reaching the ground has increased. Excessive exposure to UVA and UVB ultraviolet rays in ultraviolet rays can lead to signs of photoaging in human skin, such as: acute skin dermatitis (erythema) and burns, skin pigmentation, premature wrinkles, age spots, and even skin cancer. Consumers have become more and more aware of the harmful effects of ultraviolet rays on the skin. In recent years, sunscreen cosmetics have continued to grow in the market. The Asian region's view of "whiteness" has led consumers to favor sunscreen cosmetics. The principle of sunscreen cosmetics currently on the market is to add chemical or physical sunscreens to the products. Chemical...

AI Technical Summary

Problems solved by technology

Titanium dioxide and zinc oxide must have a particle size lower than (or partly lower than) 100 nanometers in order to achieve high sunscreen effects and good skin feel. However, the safety of nanomaterials for the human body has not yet been fully confirmed.

At the same time, titanium dioxide material also has a photocatalytic effect. In cosmetics, titanium dioxide must be well-treated before it can be used. Without treatment or improper treatment, it will promote photosensitivity and increase the risk of product sensitization.

Therefore, it is still a technical difficulty to maintain a high UV protection effect in sunscreen cosmetics while reducing the risk of product allergy as much as possible to achieve safety and effectiveness.

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