Hydroxyl-Terminated Polyisoprene (HTPI) from Mexico
HTPI is a telechelic natural rubber derivative with hydroxyl end-groups, used as a reactive prepolymer in polyurethane elastomers and adhesives. Supplied as viscous liquid or solid in drums. HTS 3913.90.1000 covers this chemically modified natural rubber in primary form.
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
• Include end-group analysis (OH content) and molecular weight data to prove chemical modification status
• Declare exact polyisoprene content (>95%) to meet polymer naming rules in subheading note (a)(1)
• Prevent reclassification to 3909 by ensuring not presented as polyurethane prepolymer solution