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.
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 copolymer is primarily acrylonitrile-butadiene-styrene (ABS) rather than MBS
ABS copolymers are specifically named in subheading 3903.30, which takes precedence over the 'Other' subheading.
If the styrene monomer content exceeds 95% by weight
Polymers with a single monomer unit contributing 95% or more are classified as homopolymers in the specific styrene subheading.
If the beads are further processed into plates, sheets, or film
Once converted into semi-finished shapes, the goods fall under Chapter 39's articles rather than primary forms.
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 MBS copolymer beads meet the 95% comonomer content threshold for methyl methacrylate, butadiene, and styrene to qualify for this tariff item
• Provide a certificate of analysis or technical datasheet to the CBSA upon request to verify composition
• Consider applying for a ruling if the exact polymer composition is ambiguous
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.
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.
Flame Retardant Polystyrene FRPS V0
Flame Retardant Polystyrene FRPS V0 is a polystyrene resin containing halogen-free flame retardants, with styrene monomer contributing over 95% by weight of the polymer content. It is in primary form (pellets) and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene, as the flame retardants are considered additives that do not change the polymer's classification.