4002.20.00.00 - Butadiene rubber (BR)

This HTS category, 4002.20.00.00, specifically encompasses butadiene rubber (BR). Butadiene rubber is a type of synthetic rubber produced through the polymerization of butadiene monomer. It is characterized by its high elasticity, good abrasion resistance, and low-temperature flexibility, making it suitable for various industrial applications, including tire manufacturing, footwear, and impact modifiers for plastics.

While other synthetic rubbers are classified under heading 4002, butadiene rubber is distinct from its siblings such as styrene-butadiene rubber (SBR) and isoprene rubber (IR). SBR, for instance, is a copolymer of styrene and butadiene, offering a different balance of properties. Isoprene rubber (IR) is a synthetic rubber that chemically approximates natural rubber, possessing distinct characteristics from BR. This specific classification ensures that butadiene rubber is identified and taxed appropriately based on its unique chemical composition and resulting physical properties.

As this is a leaf node within the HTS system, there are no further subdivisions under this specific code. The classification for butadiene rubber ends at this detailed level, meaning all forms of butadiene rubber in its primary or semi-processed states fall under this single HTS code. Therefore, importers and exporters should ensure their product precisely matches the definition and characteristics of butadiene rubber when utilizing this classification.