3911.90.91.50/Polyimide Prepolymer Powder/Germany

Polyimide Prepolymer Powder from Germany

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.

Duty Rate — Germany → United States

6.5%

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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Import Tips

• Include cure cycle instructions proving thermoset transformation from prepolymer state

• Test for 95% imide content to rule out copolymer shifts per subheading note (a)(2)

• Comply with ITAR if for defense applications; separate from tariff classification

Polyimide Prepolymer Powder from Germany — Import Duty Rate | HTS 3911.90.91.50