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POLYBUTYLENE TEREPHTHALATE

Description

Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer belonging to the polyester family. This semi-crystalline material is characterized by its excellent mechanical properties, dimensional stability, and resistance to chemicals and heat. In skincare and cosmetic formulations, PBT is primarily utilized as a film-forming agent and texture enhancer.

PBT's molecular structure consists of repeating units of butylene terephthalate, which contributes to its unique properties. The ingredient exhibits low moisture absorption, high tensile strength, and good electrical insulation characteristics. These attributes make it suitable for various applications in personal care products.

In skincare formulations, PBT functions as a film former, creating a smooth, protective layer on the skin's surface. This film helps to lock in moisture and improve the overall texture of the product. Additionally, PBT enhances the stability and viscosity of emulsions, contributing to improved product consistency and performance.

While PBT is generally considered safe for use in cosmetics, it is important to note that it is not biodegradable. Formulators should consider this factor when developing environmentally conscious products. PBT's use in skincare is typically limited to leave-on products and is often found in foundations, concealers, and other color cosmetics.