High-Tg Bismaleimide Resin Flakes from Mexico
Flake-form bismaleimide-triazine copolymer per exact chemical specification of HTS 3911.90.35.00, in primary form for composite prepreg production. Offers Tg >250°C for demanding telecom applications. Aromatic monomer content exceeds 95% threshold per subheading note.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document flake form qualifies as 'primary forms' not plates/sheets
• Verify no fiber reinforcement present
• Watch for reclassification as 3911.90.55 if minor formulation changes