Poly(1-butene) Pipe Grade Resin
High-density poly(1-butene) resin for piping applications, classified in HTS 3902.90.0050 as other olefin polymers in primary granular form with >95% 1-butene monomer units. It offers superior creep resistance and flexibility for plumbing and gas pipes. Subheading notes place it in 'Other' after polypropylene specifics.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If extruded into flexible tubes with fittings
Tubes/pipes of plastics, even from butene polymers, classify under 3917.
If propylene copolymer content predominates
Propylene copolymers with specific ratios go to 3902.30.
If imported as liquefied monomer, not polymerized
Unpolymerized olefins remain petrochemicals under Chapter 27.
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Import Tips & Compliance
• Provide density and melt index specs matching 1-butene polymer characteristics
• Avoid bulk packaging that mimics finished pipes (3925 classification risk)
• Certify no plasticizers added, per subheading note for related plastics
Related Products under HTS 3902.90.00.50
Polybutene-1 Resin PB-1
Polybutene-1 (PB-1) is a high-molecular-weight polymer of butene-1, classified under HTS 3902.90.0050 as an 'other' olefin polymer in primary form (pellets or granules) where the butene-1 monomer exceeds 95% by weight. It is used in sealants, hot-melt adhesives, and pipe applications due to its flexibility and sealing properties. This falls into the 'Other' subheading after specific polypropylene and ethylene copolymers.
Polyisobutylene Rubber PIB
Polyisobutylene (PIB) is a synthetic rubber polymer derived from isobutylene monomer, imported in primary pellet form under HTS 3902.90.0050 as 'other' olefin polymers. With isobutylene comprising over 95% by weight, it meets subheading note (a)(1) criteria. Used in chewing gum bases, adhesives, and sealants for its tackiness and impermeability.
Polymethylpentene PMP Resin
Polymethylpentene (PMP), or poly(4-methyl-1-pentene), is a high-clarity olefin polymer imported as granules under HTS 3902.90.0050, classified as 'other' due to its specific 4-methyl-1-pentene monomer (>95% by weight). Known for heat resistance and transparency, it's used in labware, medical devices, and food packaging. Fits Chapter 39 subheading notes for non-polypropylene/non-ethylene olefins.
Isotactic Polybutene Granules
Isotactic polybutene granules, a stereoregular polymer of butene with high crystallinity, fall under HTS 3902.90.0050 as 'other' primary olefin polymers (>95% butene content). Used in films and molded parts for its strength and chemical resistance. Classified per note (a)(1) for named poly- prefixes.
4-Methyl-1-Pentene Copolymer Pellets
Pellets of 4-methyl-1-pentene copolymer where the named monomer predominates by weight, classified under HTS 3902.90.0050 as other olefin polymers not specifically named. Used in high-temperature films and containers. Follows subheading note (a)(4) for predominant monomer rule.
High MW Polyisobutene Pellets
High molecular weight polyisobutene pellets (>95% isobutene units) for asphalt modification and sealants, under HTS 3902.90.0050 as primary 'other' olefins. Its viscosity index makes it ideal for industrial modifiers. Meets strict polymer purity notes.