Polyadipate Ester Resin Pellets
Polyadipate polyesters from adipic acid and diols, used as plasticizers and in polyurethane production, imported as primary pellets. HTS 3907.99.5050 covers these as other polyesters meeting predominant monomer criteria.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as unfinished oligomers
Low molecular weight esters (<1000) classify as acyclic chemicals, not polymers.
If polyurethane prepolymer
Isocyanate reaction products shift to polyurethane resins heading.
If chemical preparation blend
Mixed chemical preparations not qualifying as polymers go to mixtures heading.
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Import Tips & Compliance
• Provide formulation sheets confirming no secondary plasticizers affecting subheading 3920.43 exclusions
• Classify pre-polymer forms distinctly from fully polymerized resins
• Monitor import volumes for potential anti-dumping scrutiny on adipate esters
Related Products under HTS 3907.99.50.50
Polybutylene Terephthalate (PBT) Resin
Polybutylene terephthalate (PBT) is a thermoplastic polyester resin in primary pellet form used for injection molding in automotive and electrical components. It falls under HTS 3907.99.5050 as 'other polyesters, other' because PBT is a polyester where terephthalic acid and butanediol monomers predominate by weight, not specifically named elsewhere in the heading.
Polytrimethylene Terephthalate (PTT) Pellets
PTT resin pellets are a polyester produced from terephthalic acid and 1,3-propanediol, used in textiles and engineering plastics. Classified in 3907.99.5050 as it qualifies as 'other polyesters' where the ester monomers predominate by weight over other units.
Unsaturated Polyester Resin (UPR)
Liquid unsaturated polyester resin for fiberglass composites in marine and construction applications, supplied in primary form before curing. It enters HTS 3907.99.5050 as 'other polyesters' per predominant dicarboxylic acid/diol monomer content per subheading note (a).
Polycaprolactone (PCL) Thermoplastic Pellets
Biodegradable polyester polycaprolactone resin in pellet form for 3D printing and adhesives. Falls under 3907.99.5050 as other polyesters with caprolactone as predominant repeating unit forming ester linkages.
Polyhydroxyalkanoate (PHA) Biopolymer Resin
PHA is a family of bio-based polyesters from bacterial fermentation, used in packaging films, in primary pellet form. Classified HTS 3907.99.5050 as other polyesters based on hydroxyalkanoic acid monomer units forming ester bonds predominating by weight.
Copolyester Elastomer (COPE) Granules
Thermoplastic copolyester elastomers like Hytrel, combining hard polyester segments with soft polyether, supplied in primary granules. 3907.99.5050 applies as polyester blocks predominate by weight per classification notes.