3902.30.00.00 - Propylene copolymers

This HTS category, 3902.30.00.00, specifically covers propylene copolymers. These are polymers formed by the chemical combination of propylene with one or more other olefin monomers. The resulting materials possess distinct properties from homopolymers, often exhibiting improved flexibility, impact resistance, or clarity, depending on the comonomer used. Examples include random copolymers of propylene and ethylene, or block copolymers with butadiene.

Distinguishing this category from its siblings is crucial. Unlike 3902.10.00.00, which is exclusively for polypropylene (a homopolymer of propylene), this heading encompasses materials where propylene is bonded with at least one other distinct olefin. Similarly, it differs from 3902.20, which deals with polyisobutylene, a distinct homopolymer. The "Other" category, 3902.90.00, is reserved for polymers of other olefins that are not specified elsewhere within heading 3902 and do not involve propylene as a primary component in the copolymerization.

As a leaf node, 3902.30.00.00 represents a specific sub-classification within the broader heading for polymers of propylene or other olefins. Its coverage is therefore limited to the defined copolymers of propylene, and further subdivisions are not applicable at this level of the tariff. Classification into this category relies on the identification of propylene as a primary monomer and the presence of other olefinic comonomers in the polymer structure.