PMMP Flame-Retardant Polymer Granules
PMMP Flame-Retardant Polymer Granules are poly(1,3-phenylene methylphosphonate) in primary granular form, used as a thermoplastic resin in engineering plastics to impart fire safety. This product falls under tariff item 3911.20.00, which specifically names poly(1,3-phenylene methylphosphonate) in primary forms, and is consistent with the chapter's classification of synthetic polymers with an average of at least 5 monomer units.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the polymer is a copolymer or blend where poly(1,3-phenylene methylphosphonate) does not predominate by weight
Other polysulphones, polyethers, and similar products not elsewhere specified may apply when the named polymer is not the predominant comonomer.
If the granules are actually a polyester-based flame retardant rather than a phosphonate polymer
Other polyesters, unsaturated or saturated, may be classified under polyesters if the chemical composition differs.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the granules are in primary form (not shaped or further worked) to qualify for tariff item 3911.20.00
• Prepare a technical data sheet showing the polymer's chemical structure and monomer content to facilitate CBSA classification
• Check if the granules contain any plasticizers or additives that could shift classification to a composition under other headings
Related Products under Tariff item 3911.20.00
Phosphenon PMP-300 Flame Retardant Resin
Phosphenon PMP-300 is a commercial-grade poly(1,3-phenylene methylphosphonate) resin supplied in primary prill form, specifically designed for compounding into polycarbonate/ABS blends to enhance flame retardancy. This phosphorus-containing polymer is explicitly named in tariff item 3911.20.00, which covers poly(1,3-phenylene methylphosphonate) in primary forms, and meets the chapter's definition of plastics as a synthetic polymer capable of being formed under external influence.
Poly(1,3-phenylene methylphosphonate) Resin Pellets
Poly(1,3-phenylene methylphosphonate) Resin Pellets are supplied in primary form as translucent pellets, specifically designed for processing into flame-retardant plastics. This phosphorus-containing polymer is explicitly enumerated in tariff item 3911.20.00, which covers poly(1,3-phenylene methylphosphonate) in primary forms, and meets the chapter's criteria for plastics as synthetic polymers capable of being molded or extruded.
TE-33 Polyphosphonate Primary Pellets
TE-33 Polyphosphonate Primary Pellets are a grade of poly(1,3-phenylene methylphosphonate) designed for extrusion into flame-retardant sheets and profiles. This primary-form polymer is specifically named in tariff item 3911.20.00, which covers poly(1,3-phenylene methylphosphonate) in primary forms, and is consistent with the chapter's classification of synthetic polymers with at least 5 monomer units.