PMMP Flame-Retardant Polymer Granules from Japan
PMMP (Poly(1,3-phenylene methylphosphonate)) granules are primary-form thermoplastic resin used in engineering plastics for fire safety. Classified under HTS 3911.20.00.00 as the specifically enumerated phosphonate polymer meeting 95% monomer content requirement. These granules require melt processing into final flame-retardant components.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide FTIR/ NMR analysis confirming PMMP structure and purity; avoid common pitfall of declaring as generic 'phosphorus plasticizer' which shifts to 3904; check for anti-dumping on Asian-sourced phosphonate polymers