3907.91.50.00/Vinyl Ester Pre-Polymer Resin/Japan

Vinyl Ester Pre-Polymer Resin from Japan

Methacrylate-capped unsaturated polyester pre-polymer known as vinyl ester for chemical tanks and pipes. Technically an unsaturated polyester derivative in primary form, HTS 3907.91.5000 'other' as it doesn't meet specific copolymer exclusions. Superior hydrolysis resistance.

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

• Differentiate from true epoxies via FTIR if challenged; declare bisphenol-A content; pressure test containers pre-shipment