Polybutene is a synthetic polymer derived from petroleum. It is a clear, colorless, and viscous liquid that is commonly used in cosmetic formulations due to its excellent binding, thickening, and film-forming properties. In cosmetics, Polybutene is often used as an emollient, which helps to soften and moisturize the skin. It is also used as a tackifier, providing a sticky texture that helps products adhere to the skin or hair. This makes it a popular ingredient in lip glosses, lipsticks, and other lip products, as it provides shine, smoothness, and long-lasting wear. Additionally, Polybutene can be found in skincare products, hair care products, and makeup, where it helps to improve product texture, spreadability, and overall performance.