Polyisobutylene Rubber Vistanex LM-MS
Vistanex LM-MS is a medium molecular weight polyisobutylene polymer used primarily as a tackifier and viscosity modifier in adhesives, sealants, and rubber compounding. It falls under HTS 3902.20.5000 as 'Other' polyisobutylene in primary forms, meeting the subheading note where the isobutylene monomer units contribute over 95% by weight. This non-crosslinked elastomer is imported in pellet or slab form for industrial processing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing butyl rubber (IIR)
Butyl rubber is a copolymer of isobutylene with isoprene (<2%), classified specifically under 3902.10 rather than 'Other' polyisobutylene.
If for chemically modified versions not covered elsewhere
Chemically modified polyisobutylene falls into 'Other' under 3901.90 if not meeting specific polymer criteria in 3902 series.
If vulcanized into synthetic rubber
Vulcanized polyisobutylene rubber is classified as synthetic rubber in Chapter 40, not primary form polymers.
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Import Tips & Compliance
• Verify monomer content exceeds 95% isobutylene per Chapter 39 notes to avoid reclassification; provide supplier certificates of analysis for Customs; watch for blends exceeding 5% other monomers which shift to predominant monomer subheading
Related Products under HTS 3902.20.50.00
Indopol L-100 Polyisobutylene
Indopol L-100 is a low molecular weight liquid polyisobutylene used as a plasticizer and lubricant additive in industrial oils and greases. Classified under HTS 3902.20.5000 as 'Other' polyisobutylene where isobutylene units predominate by weight per subheading notes. Imported in drums as a viscous, colorless primary polymer form.
Oppanol B15 Polyisobutylene Resin
Oppanol B15 is a high molecular weight polyisobutylene resin serving as an adhesive tackifier and chewing gum base component. It qualifies for HTS 3902.20.5000 as 'Other' polyisobutylene with ≥95% isobutylene monomer content in primary slab or pellet form. This thermoplastic polymer is essential for pressure-sensitive adhesives.
Pebax Polyisobutylene Elastomer Pellets
Specialty polyisobutylene elastomer pellets used in medical tubing and seals, meeting 95%+ isobutylene content for HTS 3902.20.5000 classification as 'Other' polyisobutylene in primary forms. These non-crosslinked pellets are processed into flexible medical-grade components.
Liquid Polyisobutylene Napvis 10
Napvis 10 is a low-viscosity liquid polyisobutylene used in cable filling compounds and corrosion inhibitors, classified under HTS 3902.20.5000 as 'Other' with predominant isobutylene monomer units. Supplied in bulk containers as primary polymer liquid.
Hycar Polyisobutylene Adhesive Polymer
Hycar polyisobutylene is a specialty grade for hot-melt adhesives and sealants, meeting HTS 3902.20.5000 criteria as 'Other' polyisobutylene with ≥95% monomer purity in primary pellet form. Used in construction and automotive sealant formulations.
Chewing Gum Base Polyisobutylene
Food-grade polyisobutylene specifically formulated for synthetic chewing gum base, classified under HTS 3902.20.5000 as 'Other' polyisobutylene in primary forms with high monomer purity. This elastomer provides the chewable, non-stick properties essential for gum production.