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SITCSection 5
U.S. imports of polymers of vinyl esters n.e.s. & other vinyl polymers in primary forms (SITC 57592) totaled $23.7M in April 2026, traded with 24 countries.
Importers of Polymers of Vinyl Esters N.E.S. & Other Vinyl Polymers in Primary Forms paid $2.5M in duties in April 2026 — an effective duty rate of 11% on $22.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Polymers of Vinyl Esters N.E.S. & Other Vinyl Polymers in Primary Forms imports of $23.7M in April 2026 ran 20% above the year-to-date monthly average of $19.8M.
Last updated: April 2026 dataBeyond polyvinyl acetate, a range of vinyl ester polymers — including those based on vinyl propionate, vinyl laurate, and other long-chain vinyl esters — along with miscellaneous vinyl polymers such as polyvinyl formal and polyvinyl butyral (PVB), are captured in this residual category. Polyvinyl butyral is commercially significant as the interlayer resin in laminated safety glass for automotive and architectural applications, making this heading relevant to both the glass and transportation industries. Classification into this NES category requires confirming that the polymer is not more specifically provided for under vinyl acetate, vinyl chloride, or styrene headings. Importers of PVB film or resin should be aware of potential Section 301 tariff applicability on Chinese-origin goods.
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Automotive glazing manufacturers and architectural glass processors are the dominant end-users of PVB resin and film, where it functions as the adhesive interlayer in laminated safety glass. Electronics and photovoltaic module manufacturers also use PVB as an encapsulant, making this a cross-sector industrial input.
The importer should provide a technical data sheet identifying the monomer composition, degree of polymerization, and any copolymer ratios. If the dominant monomer is not vinyl acetate, vinyl chloride, or styrene, and the product is not polyvinyl alcohol, the NES heading is typically appropriate — but a binding ruling from CBP can provide certainty for high-volume shipments.
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Monthly import values over time