Vinyl Ester Resin Flakes (Thermoset)
Thermosetting vinyl ester resin flakes for corrosion-resistant laminates. Classified 3911.90.91.50 as primary thermoset NES.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If thermoplastic polyester variants
Aromatic polycarbodiimide polyesters in 3907.61 if not thermoset.
If pigmented paint varnishes
If prepared as coating material, moves to paints chapter.
If noncellular plates of polymers
Sheets/plates from these resins in 3920.10.
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Import Tips & Compliance
• Peroxide curing agent separate; combined as composite resin shifts classification
• NMR spectra for unsaturation confirming crosslink sites
• DOT shipping papers if MEKP catalyst included
Related Products under HTS 3911.90.91.50
Melamine-Formaldehyde Resin Granules
Thermosetting melamine-formaldehyde resin in granular primary form, used for molding durable laminates and coatings. Classified under HTS 3911.90.91.50 as a thermosetting polymer not elsewhere specified, meeting the criteria where the monomer units contribute over 95% by weight per subheading note (a)(1).
Urea-Formaldehyde Resin Powder
Thermosetting urea-formaldehyde resin powder in primary form for particleboard adhesives and molded products. Falls under 3911.90.91.50 as a thermosetting product NES, compliant with polymer classification rules based on predominant monomer weight.
Epoxy Novolac Resin Pellets
High-performance thermosetting epoxy novolac resin in pellet form for electronics encapsulation. HTS 3911.90.91.50 applies to this NES thermosetting polymer in primary form, where epoxy and novolac units predominate per note (a)(4).
Diallyl Phthalate Resin Granules
Thermosetting diallyl phthalate (DAP) resin granules for high-temperature electrical components. Classified in 3911.90.91.50 as other thermosetting polymers in primary forms not specified elsewhere.
Polyimide Prepolymer Powder
Thermosetting polyimide prepolymer powder in primary form for aerospace composites. Under 3911.90.91.50 as NES thermosetting product, classified by predominant imide monomer units.
Cyanate Ester Resin Flakes
Thermosetting cyanate ester resin flakes for radar-transparent composites. HTS 3911.90.91.50 covers this primary form thermoset NES in Chapter 39.