Pure Polybutylene Homopolymer Granules
Pure Polybutylene Homopolymer Granules contain 98%+ butene-1 monomer units in unmodified primary form for masterbatch production. Ideal for blending in wire insulation and medical tubing. Classified specifically as polybutylene under 3902.90.0010 due to exceeding 95% named polymer threshold.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If propylene-butene copolymers where propylene > butene
Classification follows weight-dominant monomer unit.
If chemically modified (e.g., chlorinated)
Modified polymers go to 'Other' or appropriate chemical subheading.
If processed into silicone-modified form
Silicones have separate chapter classification.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include GPC/Molecular weight certificates to prove primary polymer status
• Declare exact % composition on commercial invoice to match subheading note (a)(1)
Related Products under HTS 3902.90.00.10
Polybutylene Resin PB-01
Polybutylene resin PB-01 is a high-purity thermoplastic polymer in primary pellet form, consisting of at least 95% butene-1 monomer units by weight. It is used in hot-melt adhesives and pipe manufacturing due to its flexibility and creep resistance. Classified under HTS 3902.90.0010 as polybutylene per subheading note (a)(1), as the named monomer contributes over 95% of the polymer content.
PB Pipe Grade Polybutylene Pellets
PB Pipe Grade Polybutylene Pellets are unmodified polybutylene homopolymer granules for plumbing pipe extrusion, with butene-1 units comprising 97% by weight. This primary form polymer offers superior stress crack resistance for hot/cold water systems. Falls under 3902.90.0010 as it meets the polybutylene definition in primary forms.
Industrial Polybutylene PB-402
Industrial Polybutylene PB-402 is a high molecular weight polybutylene in granular primary form, with 96.5% butene-1 content for injection molding applications. Used in flexible packaging films and sealants due to its clarity and toughness. HTS 3902.90.0010 applies as pure polybutylene per Chapter 39 polymer classification rules.
Polybutylene for Hot Melt Adhesives
Polybutylene for Hot Melt Adhesives is a low-viscosity polybutylene resin pellets (95.2% butene-1) in primary form, designed for packaging and bookbinding glues. Its tackiness and flexibility make it ideal for non-woven applications. Meets HTS 3902.90.0010 criteria as named polybutylene polymer.