Daquan of silicone oil for cosmetics
I. brief introduction and classification of cosmetics
The definition of cosmetics mainly refers to the chemical industrial products or fine chemical products that are evenly distributed on any part of the human body surface, such as hair, face, neck, armpit, nails, lips and teeth, etc., by means of daubing, spraying, etc., to achieve the purpose of cleaning, maintaining, beautifying, modifying, changing appearance, etc., and keeping people in good condition.
There are many kinds of cosmetics. According to the application position and effect of cosmetics, cosmetics can be divided into the following categories:
Basic cosmetics: refer to products for protecting skin, hair and promoting skin and hair health.
Beauty cosmetics: refers to the products to beautify the face, nails and other parts, so as to increase the charm.
Cosmetics for special use: refers to the products used in the face, hair and other parts with defense function or need to go through some special physical and chemical treatment, but also has a certain degree of palliative treatment effect.
Silicon oil, an important raw material in cosmetics
Organosilicon has a unique silicon oxygen bond structure Si-O-Si, which gives a larger bond angle and bond length, and the intermolecular force is small. Unlike ordinary organic molecules, it is easy to crystallize, so it has good permeability. The high bond energy makes the organosilicon polymer have outstanding heat resistance and excellent softness; the spiral structure of its molecular chain and the longitudinal side of methyl make it have very low surface tension and good water repellency. Due to its special structure, organosiloxane polymer has a series of properties, such as lubrication, softness, water repellency, defoaming, antibacterial, mildew resistance, etc. it is used in personal care products.