Halogenated Butene Polymer from Japan
Halogenated butene polymer, specifically chlorinated polybutene, is a synthetic polymer in primary form used as a sealant base. It is classified under tariff item 3904.90.00 as 'Other' polymers of halogenated olefins because chlorinated polybutene does not fall under the more specific subheadings for PVC or other named halogenated polymers.
Duty Rate — Japan → Canada
Import Tips
• Confirm that the polymer is in primary form (e.g
• liquid or paste) and not a solution with over 50% solvent, which would shift classification to Chapter 32
• Provide a certificate of analysis showing the chlorine content and monomer distribution to the CBSA
• If the polymer is used as a sealant, ensure it does not contain additives that would reclassify it as a composition under Chapter 39 supplementary notes