MBS Copolymer Resin Pellets
Transparent MBS copolymer resin pellets in primary form, where methyl methacrylate, butadiene, and styrene comonomers contribute 95% or more by weight. These pellets are used as impact modifiers for PVC, offering clarity and toughness. They are classified under tariff item 3903.90.00 as 'Other' styrene polymers, as MBS is not a named copolymer in subheadings 3903.20 or 3903.30.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the styrene content is 95% or more by weight
Homopolymers of styrene are classified in subheading 3903.19, not as copolymers.
If the pellets are extruded into film or sheets
Further processing into semi-finished articles changes the classification to heading 39.20.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the pellets are not printed or surface-worked, as this could move them to Chapter 49 under section note 2
• Verify that the comonomer content meets the 95% threshold to avoid misclassification
• If the pellets are sold with other components as a set, review section note 1 for potential classification as a mixture
Related Products under Tariff item 3903.90.00
Blow Molding Polystyrene BMPS 450
Blow Molding Polystyrene BMPS 450 is a polystyrene resin in primary pellet form, designed for blow molding applications such as bottles. With a styrene monomer content exceeding 95% by weight, it qualifies as a homopolymer of styrene under heading 39.03, and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms.
Clear MBS Copolymer Beads for PVC Toughening
Clear MBS copolymer beads in primary form, composed of methyl methacrylate, butadiene, and styrene with a combined comonomer content of 95% or more by weight. These beads are used as an impact modifier to toughen PVC products, enhancing clarity and durability. They fall under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, since MBS copolymers are not specifically named in other subheadings of heading 39.03.
Crystal Polystyrene GPPS 535H
Crystal Polystyrene GPPS 535H is a clear, general-purpose polystyrene resin in pellet form, composed of over 95% styrene monomer units. It is used for injection molding applications and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as it is a homopolymer not otherwise specified in the subheading.
Electronics Grade Polystyrene EGPS 600
Electronics Grade Polystyrene EGPS 600 is a low-static polystyrene resin in pellet form, with a styrene monomer content exceeding 95% by weight. It is used in electronics applications and falls under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not specifically named in the subheading.
Expandable Polystyrene EPS Beads F400
Expandable Polystyrene EPS Beads F400 are polystyrene beads impregnated with a pentane blowing agent, with styrene monomer content exceeding 95% by weight. Despite being expandable, they are classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as the subheading 3903.11 for expandable polystyrene is not applicable in this tariff structure.
Extrusion Grade Polystyrene PSX 125
Extrusion Grade Polystyrene PSX 125 is a low-viscosity polystyrene resin in pellet form, designed for film extrusion. With a styrene monomer content exceeding 95% by weight, it is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as it is a homopolymer not otherwise specified.