Bismaleimide-Triazine (BT) Resin Pellets from Canada
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 — Canada → United States
10%
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 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