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).
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If phenolic resin (phenol-formaldehyde based)
Phenol-formaldehyde polymers are specifically named and covered in 3909.20, taking precedence over 3911.90.
If for unsaturated polyester resins used in composites
Polyesters from dicarboxylic acids fall under heading 3907, not general NES thermosets in 3911.
If imported as finished sheets or plates
Processed into non-primary forms like sheets, classified by end-use shape in 3921, not primary polymers.
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Import Tips & Compliance
• Verify thermosetting nature via DSC testing to confirm no melt flow under heat, distinguishing from thermoplastics
• Provide monomer composition certificates showing 95%+ contribution to avoid reclassification under 'Other' per subheading note (a)(4)
• Ensure primary form (granules/powder) documentation; finished articles shift to Chapter 39 headings like 3920
Related Products under HTS 3911.90.91.50
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.
Bismaleimide Resin Pellets
High-temp bismaleimide (BMI) thermosetting resin pellets for aircraft structures. Primary form classification under 3911.90.91.50 as other thermosets.