Chlorinated Nitrile Butadiene Rubber (HNBR-Cl)
High-performance chlorinated synthetic rubber based on hydrogenated nitrile butadiene rubber, with chlorinated units exceeding 95% by weight. Ideal for automotive seals and gaskets requiring heat and fluid resistance. Falls under 3911.90.70.00 for its primary form chlorinated structure.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for unchlorinated nitrile rubber base
Base synthetic rubbers of acrylonitrile-butadiene are Chapter 40, not chlorinated polymers of Chapter 39.
If polysulfide-based chlorinated rubber
Polysulfides have specific subheadings; classification follows polymer series rules.
If predominantly ethylene-chlorinated copolymer
Ethylene-vinyl acetate copolymers (95%+) go to specific 3901 subheadings per note (a)(2).
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Import Tips & Compliance
• Submit FTIR or NMR test reports proving chlorination meets subheading purity standards
• Ensure declaration specifies 'primary forms' to distinguish from finished articles in 3926
Related Products under HTS 3911.90.70.00
Chlorobutyl Rubber (CIIR)
Chlorinated isobutylene-isoprene rubber (CIIR) in primary pellet or bale form, where chlorinated monomer units predominate >95% by weight. Widely used in tire inner liners and pharmaceutical stoppers for air impermeability. Classified in 3911.90.70.00 as chlorinated synthetic rubber.
Hypalon Chlorinated Rubber (CSM-20)
Chlorosulfonated polyethylene (Hypalon CSM-20), a chlorinated synthetic rubber with >95% polyethylene-derived chlorinated units. Excels in chemical-resistant hoses and cables. Primary form classification under 3911.90.70.00.
Chlorinated Styrene-Butadiene Rubber (Cl-SBR)
Chlorinated copolymer of styrene-butadiene rubber, meeting 95% chlorinated unit threshold. Used in tire treads and conveyor belts for enhanced adhesion. 3911.90.70.00 for this primary chlorinated synthetic rubber.
Baymod CN Chlorinated Rubber
Commercial chlorinated synthetic rubber resin (Baymod CN series) from chlorination of natural/synthetic base, >95% purity. For marine coatings and adhesives. HTS 3911.90.70.00 applies.
Chlorinated Polyisoprene Rubber (Cl-IR)
Chlorinated synthetic polyisoprene rubber in latex or solid form, predominant chlorinated units. Used in medical gloves and seals. Primary form under 3911.90.70.00.
Permalyn Chlorinated Resin
Chlorinated terpene-phenolic synthetic rubber resin for adhesives. 95%+ chlorinated content. 3911.90.70.00.