Polybutene-1 Resin PB-1 from Canada
Polybutene-1 (PB-1) is a high-molecular-weight polymer of butene-1, classified under HTS 3902.90.0050 as an 'other' olefin polymer in primary form (pellets or granules) where the butene-1 monomer exceeds 95% by weight. It is used in sealants, hot-melt adhesives, and pipe applications due to its flexibility and sealing properties. This falls into the 'Other' subheading after specific polypropylene and ethylene copolymers.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify monomer composition via lab analysis to confirm >95% butene-1 content for 3902 classification
• Provide supplier certificates showing primary form (granules/pellets) and no chemical modification
• Avoid misclassification as polyethylene by detailing predominant monomer in documentation