3903.90.10.00/MBS Impact Modifier Powder (Core-Shell Type)/Japan

MBS Impact Modifier Powder (Core-Shell Type) from Japan

Fine powder form of core-shell MBS copolymer where butadiene core is rubber-modified with MMA/styrene shell, meeting 95% comonomer criteria. Classified under the specific MBS subheading 3903.90.1000 in primary forms. Used in extrusion and injection molding for enhanced toughness.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Document particle size distribution (typically 0.1-5 microns for powders) to prove primary form status

• Use ISCC PLUS certification for sustainable sourcing claims

• Common issue: dust mitigation labeling required for fine powders