What is the formula structure of sunscreen, and what are the main ingredients of sunscreen? What is

Sunscreen is one of the four ingredients in the formula:

Stearic acid: stearic acid, also known as octadecyl acid, is a kind of fatty acid widely found in nature, almost all oils and fats have varying amounts of stearic acid, and the content in animal fats is higher, such as butter content up to 24%, vegetable oil content less, tea oil, palm oil is 6%, but the content in cocoa butter is as high as 34%. There are two main production methods of industrial stearic acid: fractionation and pressing.

A decomposition agent is added to the hardened oil, and then the crude fatty acid is hydrolyzed, and then the finished product is obtained by washing, distillation and decolorization, and glycerin is a by-product.

In the cosmetics industry, it is an indispensable raw material for the manufacture of general emulsified products, which is used in the preparation of alabaster cream, cold cream, foundation cream, shaving cream, hair cream and skin care lotion. Among them, it plays an emulsifying role in two types of skin care products, such as cream cream and cold cream, so that it becomes a stable and white paste.

Octadectyl alcohol: Octave alcohol appears to be white flake or granular solid, fragrant, insoluble in water, soluble in ethanol, ether, benzene, chloroform. It can be prepared by hydrolysis of giant whale oil, hydrogenation of stearic acid catalyzed by copper chromate, or reduction of ethyl stearate with saturated ethanol.

It can also be prepared by controlling the polymerization reaction of ethylene under the action of alkyl aluminum, and then prepared by carbonyl synthesis.

Vaseline: Vaseline is a semi-liquid mixture of alkane hydrocarbons or saturated hydrocarbons, also known as petrolatum, which is prepared by petroleum fractionation. Its state is between solid and liquid at room temperature, and there are three colors of brown, yellow and white due to different uses.

Natural petrolatum is derived from petroleum residue oil concentrates such as alkane hydrocarbons, heavy oil; Artificial petroleum jelly is derived from a mixture of mineral oil thickened with pure geowax or paraffin wax and paraffin grease. Vaseline has a mineral oil smell but no kerosene smell. It can be used as a raw material for pharmaceuticals and cosmetics, and can also be used for machine lubrication.

Vaseline is an important ingredient in sunscreens, from sunscreens and after-sun heat stores, to waterless sunscreens. Vaseline protects ** from damage and reduces sunspot cells.

Propylene glycol: Propylene glycol, is an organic compound (glycol), usually a slightly sweet, odorless, colorless, transparent oily liquid that absorbs moisture and mixes easily with water, acetone, and chloroform. Propylene glycol can be manufactured by hydration of propylene oxide.

It can be used as a wetting agent in toothpaste and cosmetics with glycerin or sorbitol.

The making and formulation of sunscreen.

The main ingredient of sunscreen is chemical composition, mainly including dibenzoylmethane, and benzophenone, which has a relatively high sun protection index. It is these chemical ingredients that block ultraviolet rays and prevent them from being damaged by ultraviolet rays.

The main ingredients of sunscreen are zinc oxide, titanium oxide, salicylates, cinnamates, and anthranilates. The principle of sun protection is to do physical skin care.

Sunscreen molecules, salicylates , water , anthranilate , zinc oxide and many more. Some sunscreens contain some ingredients that protect against UVA rays, and can also protect against UVA and UVB, which can prevent aging.

Physical sunscreen is a bit thicker and heavier, mainly titanium dioxide, which reflects ultraviolet rays through particles.

1. How to use sunscreen: clean socks before use**. Moisturize with moisturizing water before applying cream. Squeeze sunscreen into your hands and don't apply it directly to your face; Use your fingers to apply evenly over your face little by little.

2. The main role of sunscreen is to prevent direct exposure to ultraviolet rays, reduce pigmentation, sunscreen is a cosmetics that girls need all year round, sunscreen is divided into physical sunscreen and chemical sunscreen, physical sunscreen is the use of sunscreen particles on the surface of the formation of a protective film, to prevent ultraviolet rays from directly reaching the sunscreen, chemical sunscreen is to use the chemical components to combine with cells, absorb the ultraviolet light after reaching the first place, and prevent the precipitation of melanin.

There are two types of sunscreens: physical sunscreen and chemical sunscreen, which are explained separately below:

1. Physical sunscreen: Using the principle of physics, the atomic particles of this sunscreen are flaked, and reflective particles, such as titanium dioxide and zinc oxide, are used to reflect and scatter light, so that the amount of ultraviolet rays that reach the highest level can be reduced to achieve the purpose of sunscreen.

2. Chemical sunscreen: Sunscreen is achieved by absorbing harmful ultraviolet rays, because chemical sunscreen molecules will be absorbed, so the process of absorbing ultraviolet rays occurs inside and is metabolized by the human body and removed.

Sunscreens act as sun protection through inorganic or organic active ingredients.

Inorganic sunscreen ingredients are usually inorganic substances such as zinc oxide and titanium oxide, which can reflect and scatter ultraviolet radiation, and organic sunscreen ingredients are usually OMC (Octy Methoxycinnamate) and light benzazole (oxybenzone), which can absorb ultraviolet radiation and convert radiation energy into heat. Many frosts protect ** from both UVA rays (UVA, UVB) at the same time. UVA and UVB will deal different damage to **.

From another point of view: through the reflection and absorption of light, two mechanisms work, that is, (that is, the principle of sunscreen is physical sunscreen and chemical sunscreen), general inorganic matter is reflective, organic matter is absorption.

Sunscreen classification.

1.Physical sunscreen: As the name suggests, it is the use of physical principles, the atomic particles of this sunscreen are flaked, and when applied on the face, they are like a mirror, reflecting sunlight and achieving the purpose of sun protection.

Titanium dioxide and zinc oxide. They are all physical sunscreen ingredients. They can form a protective film on the **, so that the ultraviolet rays cannot penetrate the skin surface, both can provide comprehensive UVB protection, not suitable for full body sun protection, must use a product to help remove it, etc.

2.Chemical sunscreen: It is to use chemical ingredients to protect from the sun, this sunscreen is to use the principle of absorption to protect the sun, as a light-transmitting substance, which can absorb ultraviolet rays and convert it into molecular vibration energy or heat energy to achieve the effect of sunscreen, such as para-aminobenzoic acid and its derivatives, cinnamic acid, etc., after being applied to the face, atoms absorb sunlight to prevent sunlight from contacting**, theoretically, physical sunscreen is better than chemical sunscreen, but there are too many chemical sunscreens on the market at present.