Polyester-5 is a synthetic polymer commonly used in cosmetic formulations. It is derived from a combination of different monomers, including adipic acid and neopentyl glycol. This ingredient is known for its film-forming, thickening, and emulsifying properties.In cosmetic formulations, Polyester-5 is often used to improve the texture and consistency of products, such as creams, lotions, and gels. It helps to create a smooth and even application, while also providing a protective barrier on the skin or hair. Additionally, it can enhance the performance of other ingredients, such as sunscreens and colorants, by improving their dispersion and stability.Some common use cases for Polyester-5 in cosmetic formulations include:1. Sunscreen products: Polyester-5 can help to improve the water resistance and spreadability of sunscreens, ensuring an even and long-lasting protection against UV rays.2. Hair care products: In hair styling products, Polyester-5 can provide hold, shine, and humidity resistance, while also helping to reduce static and frizz.3. Color cosmetics: Polyester-5 can be used in foundations, concealers, and other color cosmetics to improve their adherence to the skin and enhance their wear time.4. Skin care products: In creams and lotions, Polyester-5 can act as an emulsifier and thickener, providing a rich and luxurious texture while also helping to lock in moisture and protect the skin.