Elastomeric
Polymers of propylene or of other olefins, in primary forms: > Polyisobutylene: > Elastomeric
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Products classified under HTS 3902.20.10.00
Elastomeric Polyisobutylene Rubber
Elastomeric polyisobutylene is a synthetic rubber polymer where isobutylene monomer units constitute 95% or more by weight, classified under HTS 3902.20.10.00 as elastomeric polyisobutylene in primary form. It is used in manufacturing tires, seals, and adhesives due to its high elasticity and impermeability to gases. This primary form excludes finished articles or compounded products.
Butyl Rubber Vistanex L-100
Vistanex L-100 is a high molecular weight elastomeric polyisobutylene with over 95% isobutylene content, imported in primary pellet form under HTS 3902.20.10.00. Known for tackiness, it serves as a pressure-sensitive adhesive base in tapes and sealants. Its elastomeric nature distinguishes it from rigid polyolefins.
Elastomeric Polyisobutylene Pellets for Tire Inner Liner
These pellets are elastomeric polyisobutylene with 97% isobutylene monomer content, designed for compounding into tire inner liners under HTS 3902.20.10.00. Their gas impermeability and elasticity qualify them as primary form elastomers. Supplied unvulcanized for downstream rubber processing.
Opanols Elastomeric Polyisobutylene Resin
Opanols are medium molecular weight elastomeric polyisobutylene resins meeting the 95% isobutylene criterion for HTS 3902.20.10.00 classification in primary forms like granules. Used in chewing gum bases and cable insulation for elasticity and moisture resistance. Excludes any finished plastic articles.
High Cis Elastomeric Polyisobutylene HMW
High molecular weight (HMW) elastomeric polyisobutylene with high cis content, over 95% isobutylene by weight, imported as primary polymer under HTS 3902.20.10.00. Ideal for sealants, roofing membranes, and vibration dampeners due to superior elasticity. Primary form ensures classification before vulcanization.