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SITCSection 5
U.S. imports of petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones & other plastics n.e.s. in primary forms (SITC 57596) totaled $51.1M in April 2026, traded with 31 countries.
Importers of Petroleum Resins, Coumarone-Indene Resins, Polyterpenes, Polysulfides, Polysulfones & Other Plastics N.E.S. in Primary Forms paid $5.3M in duties in April 2026 — an effective duty rate of 12% on $42.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataPetroleum hydrocarbon resins — produced by polymerizing C5 and C9 fractions from steam cracking — along with coumarone-indene resins, polyterpenes, polysulfides, and polysulfones, form a commercially diverse group of specialty polymers used as tackifiers in adhesives, modifiers in rubber compounding, and performance additives in coatings and road-marking materials. Polysulfones, including polyethersulfone (PES) and polyphenylsulfone (PPSU), are high-performance engineering thermoplastics used in filtration membranes, medical sterilization equipment, and aerospace components. The breadth of this NES grouping means that the specific resin chemistry — aliphatic versus aromatic, C5 versus C9, sulfone backbone type — is critical for both classification accuracy and end-use specification matching.
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C5 aliphatic resins are derived from the piperylene and isoprene fractions of steam cracker output and are valued for their light color and compatibility with EVA and natural rubber in hot-melt adhesives. C9 aromatic resins come from the vinyltoluene and indene fractions and offer higher softening points and better compatibility with SBS and SIS block copolymers. Both fall within this heading, but buyers specify the fraction type precisely because the two are not interchangeable in most adhesive formulations.
Polysulfones — including PES and PPSU grades — offer continuous-use temperatures well above those of standard engineering plastics, along with inherent hydrolytic stability and transparency, making them suitable for repeated steam sterilization cycles in medical and food-processing equipment. These performance attributes command significant price premiums over commodity resins, and importers should document the specific polymer grade and application to support classification and justify valuation.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| BELGIUM | $356K | $18.2M | +$17.8M |
| CHINA | $4.5M | $12.0M | +$7.4M |
| CANADA | $5.7M | $9.2M | +$3.4M |
| JAPAN | $8.7M | $5.2M | -$3.5M |
| NETHERLANDS | $1.5M | $11.8M | +$10.3M |
Monthly import values over time