Hexagonal boron nitride (h-BN) is the new favorite of the cosmetics industry in recent years. It has excellent physical and chemical properties, such as resistance to strong acids and alkalis, oxidation resistance, high temperature resistance, high thermal conductivity, mechanical strength, and lubricity. and wide band gaps, etc. It is also called “white graphite” because it has a similar structure to graphite but is white, loose, soft and smooth in appearance.

Among the many advantages of h-BN, the one that is most valued by the cosmetics industry is its lubricity, so it is often used as an extender pigment in cosmetics. It is reported that extender pigments for cosmetics are the base for dispersing colored pigments, and they have a great impact on the feeling of use such as spreadability (the property of applying smoothly to the skin surface) and durability (the property of maintaining the state of application on the skin). Big impact.

However, most of the extender pigments used in cosmetics are natural minerals and resins, which are not always satisfactory in terms of usability and stability. For example, due to the catalytic activity of inorganic materials such as talc, mica and sericite, This causes the deterioration of fragrances and oils, which is considered to be the cause of odor. In addition, although resin materials such as nylon powder and polyethylene powder are chemically stable, there is a problem of poor formability. In these issues, h-BN powder is superior to the first two, and it not only has excellent lubricity, but also has a flat shape, so it has appropriate covering power and adhesion at the same time.

The famous SK-II “little light bulb” that costs thousands of dollars contains h-BN

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