Bismaleimide-Triazine (BT) Resin Pellets from China
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 — China → United States
35%
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
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
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