TE-33 Polyphosphonate Primary Pellets
TE-33 grade poly(1,3-phenylene methylphosphonate) pellets designed for extrusion into flame-retardant sheets and profiles. This primary form polymer is specifically named in HTS 3911.20.00.00 due to its defined chemical structure and 95%+ monomer purity. Provides halogen-free fire resistance in thermoplastics.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If low molecular weight liquid variants
Polyethylene polymers in primary forms include low MW liquids; PMMP not meeting solid polymer criteria may shift here by predominant monomer.
If imported as nucleic acid derivative
Certain heterocyclic phosphorus compounds classified as pharmaceuticals/organics in 2934 rather than polymers.
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Import Tips & Compliance
• Submit GPC chromatograms proving molecular weight distribution consistent with PMMP; declare exact CAS number if available; beware of misclassification as 3911.90 if minor impurities exceed documentation thresholds
Related Products under HTS 3911.20.00.00
Poly(1,3-phenylene methylphosphonate) Resin Pellets
Poly(1,3-phenylene methylphosphonate), a phosphorus-containing polymer, is supplied in primary form as translucent pellets for processing into flame-retardant plastics. It falls under HTS 3911.20.00.00 as a specifically named polymer in primary forms (pellets) not elsewhere classified in Chapter 39. This material meets the subheading note requiring the named monomer units to contribute 95% or more by weight.
PMMP Flame-Retardant Polymer Granules
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.
Phosphenon PMP-300 Flame Retardant Resin
Phosphenon PMP-300 is a commercial-grade poly(1,3-phenylene methylphosphonate) resin in primary prill form for compounding into PC/ABS blends. HTS 3911.20.00.00 specifically covers this named phosphorus polymer meeting purity standards. Used primarily for high-performance flame-retardant thermoplastics.