Bismaleimide-Triazine (BT) Resin Pellets from Japan
BT resin is a thermosetting polymer formed from 1,1'-Bis(methylenedi-4,1-phenylene)-1H-pyrrole-2,5-dione copolymerized with 4,4'-methylenebis(benzeneamine), used in high-performance laminates. It falls under HTS 3911.90.35.00 due to its specific aromatic thermosetting composition in primary pellet form. This material provides excellent thermal stability for electronics applications.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Verify monomer composition meets the 95% threshold for named copolymer per subheading note (a)(2); provide technical data sheets confirming aromatic thermosetting nature
• Ensure proper storage conditions during transit to prevent premature curing
• Common pitfall: misclassification as generic polysulfone under 3911.90.55.00