Polybutene-1 Resin PB-1
Polybutene-1 (PB-1) is a polyolefin polymer derived from butene-1 monomer, classified under HTS 3902.90.00 as it falls within polymers of other olefins in primary forms (pellets or granules). It meets the subheading note requiring the monomer unit to contribute 95% or more by weight. Used in pipes, films, and sealants due to its flexibility and sealability.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If derived primarily from propylene monomer
Propylene-based polymers like polypropylene are classified under 3902.10, not 'other olefins', per subheading note (a)(1).
If chemically modified or copolymerized with non-olefin monomers dominating
Modifications or copolymers not meeting 95% olefin purity shift to polyethylene series under Chapter 39 heading 3901.
If imported in liquid form without polymerization
Unpolymerized olefin monomers like butene are petrochemicals under Chapter 27, not primary form polymers.
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Import Tips & Compliance
• Verify monomer content exceeds 95% butene-1 via lab testing to confirm classification; provide supplier certificates of analysis for Customs review
• Avoid blending with other polymers over 5% to prevent reclassification
• Ensure proper UN packaging for molten resin shipments
Related Products under HTS 3902.90.00
Polyisobutylene (PIB) Gum
Polyisobutylene is a synthetic rubber-like polyolefin from isobutylene monomer, imported as viscous liquid or granules under HTS 3902.90.00 for other olefin polymers in primary forms. It qualifies as the isobutylene units exceed 95% by weight. Commonly used in chewing gum base, adhesives, and sealants.
Polymethylpentene (PMP) Pellets
Polymethylpentene, a high-clarity polyolefin from 4-methyl-1-pentene monomer, is imported in pellet form under HTS 3902.90.00 as other olefin polymers in primary forms. The monomer contributes over 95% by weight per chapter notes. Ideal for labware, medical devices, and microwave components due to heat resistance.
Poly-4-methyl-1-pentene Granules
Granular poly-4-methyl-1-pentene (TPX) is a semicrystalline olefin polymer used in optical and high-temp applications, classified in HTS 3902.90.00 for primary form olefin polymers beyond propylene. Meets 95% monomer threshold. Offers low density and high transparency.
High-Density Polybutene Pellets
High-density polybutene resin pellets for piping and hot-melt adhesives are olefin polymers under HTS 3902.90.00, as butene-derived in primary granular form with >95% monomer content. Provides superior creep resistance and flexibility.
Isotactic Polybutene Powder
Isotactic polybutene powder, a stereoregular olefin homopolymer, is classified under HTS 3902.90.00 for other olefins in primary powder form suitable for compounding. Monomer purity exceeds chapter note requirements. Applied in sealants and electrical insulation.
Copolymer Polybutene PB-0300 MFI Pellets
PB-0300 copolymer polybutene pellets with 0.3 g/10min MFI for film blowing, classified as other olefin polymers in HTS 3902.90.00 since butene units predominate over 95%. Used in stretch films and medical packaging.